CN211688632U - System for treating wastewater - Google Patents

System for treating wastewater Download PDF

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Publication number
CN211688632U
CN211688632U CN201921389962.5U CN201921389962U CN211688632U CN 211688632 U CN211688632 U CN 211688632U CN 201921389962 U CN201921389962 U CN 201921389962U CN 211688632 U CN211688632 U CN 211688632U
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electrolytic
plate
optionally
pipeline
electrode
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孙宁磊
刘苏宁
曹敏
李诺
彭建华
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China ENFI Engineering Corp
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China ENFI Engineering Corp
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Abstract

The utility model discloses a system for handle waste water, include: the device comprises a pressurization oxidation unit, an electrolytic air flotation oxidation unit, an electrolytic flocculation unit, a first pipeline, a second pipeline, a third pipeline, a detection device, a fourth pipeline, a fifth pipeline and a control device, wherein the first pipeline is connected with the pressurization oxidation unit and the electrolytic air flotation oxidation unit and is provided with a first reversing valve; the second pipeline is connected with the electrolytic air flotation oxidation unit and the electrolytic flocculation unit and is provided with a second reversing valve; the third pipeline is connected with the pressure oxidation unit and the electrolytic flocculation unit and is provided with a third reversing valve; the detection device comprises a wastewater inlet and a wastewater outlet; the fourth pipeline is connected with the wastewater outlet and the pressure oxidation unit and is provided with a fourth reversing valve; the fifth pipeline is connected with the wastewater outlet and the electrolytic air flotation oxidation unit and is provided with a fifth reversing valve; the control device is connected with the detection device, the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve and the fifth reversing valve.

Description

System for treating wastewater
Technical Field
The utility model belongs to the waste water treatment field, concretely relates to system for handle waste water.
Background
Various industries relate to wastewater treatment, such as evaporative crystallization mother liquor, biochemical garbage leachate and the like, high COD (chemical oxygen demand) content, high oil content and the like are caused, the treatment is extremely difficult, a single method cannot be basically achieved at one time, and a large amount of medicaments are required to be added in the traditional Fenton method and the like, so that a large amount of waste residues are generated, and secondary pollution is caused.
Thus, the existing wastewater treatment technologies are in need of further improvement.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, an object of the utility model is to provide a system for handle waste water, adopt COD and heavy metal in this system treatment waste water that can different quality of water, can not bring secondary pollution to area is little, and the cost is with low costs.
In one aspect of the present invention, a system for treating wastewater is provided. According to the utility model discloses an embodiment, the system includes:
a pressure oxidation unit;
an electrolytic air flotation oxidation unit;
an electrolytic flocculation unit;
the first pipeline is respectively connected with the pressurization oxidation unit and the electrolytic air flotation oxidation unit, and a first reversing valve is arranged in the first pipeline;
the second pipeline is respectively connected with the electrolytic air flotation oxidation unit and the electrolytic flocculation unit, and a second reversing valve is arranged in the second pipeline;
the third pipeline is respectively connected with the pressure oxidation unit and the electrolytic flocculation unit, and a third reversing valve is arranged in the third pipeline;
a detection device comprising a wastewater inlet and a wastewater outlet;
the fourth pipeline is respectively connected with the wastewater outlet and the pressure oxidation unit, and a fourth reversing valve is arranged in the fourth pipeline;
and the fifth pipeline is respectively connected with the wastewater outlet and the electrolytic air flotation oxidation unit, and a fifth reversing valve is arranged in the fifth pipeline.
And the control device is connected with the detection device, the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve and the fifth reversing valve, and controls the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve and the fifth reversing valve to be opened and closed based on the display of the detection device.
According to the utility model discloses system for handle waste water is through setting up detection device, this detection device detects the COD content in the influent water, and feed back the detection data to controlling means, this controlling means is based on opening and closing of the valve on the COD detected value control pipeline in the waste water, thereby can select different treatment methods according to different quality of water, for example, when detection device shows that the COD value is higher than 20000ppm, controlling means closes fifth switching-over valve and third switching-over valve, open fourth switching-over valve, first switching-over valve and second switching-over valve, even make waste water get into pressurization oxidation unit, electrolysis air supporting oxidation unit and electrolysis flocculation unit after detection device in proper order and handle; when the COD value displayed by the detection device is lower than 5000, the control device closes the fourth reversing valve, the first reversing valve and the third reversing valve, and opens the fifth reversing valve and the second reversing valve, so that the wastewater passes through the detection device and then sequentially enters the electrolytic air flotation oxidation unit and the electrolytic flocculation unit for treatment; when the detection device displays that the COD value is 15000-20000 ppm, the control device closes the fourth reversing valve and the second reversing valve, opens the fifth reversing valve, the first reversing valve and the third reversing valve, and then the wastewater passes through the detection device and then sequentially enters the electrolytic air flotation oxidation unit, the pressurization oxidation unit and the electrolytic flocculation unit for treatment; when the COD value of the detection device is 5000-10000 ppm, the detection device does not contain 10000ppm, the control device closes the fifth reversing valve, the first reversing valve and the third reversing valve, and opens the fourth reversing valve and the third reversing valve, namely, the wastewater passing through the detection device sequentially enters the pressure oxidation unit and the electrolytic flocculation unit for treatment; and when the detection device displays that the COD value is 10000-15000 ppm, the COD value does not include 15000ppm, the control device closes the fifth reversing valve, the second reversing valve and the third reversing valve, and opens the fourth reversing valve and the first reversing valve, namely, the wastewater passing through the detection device sequentially enters the pressurization oxidation unit and the electrolysis air flotation oxidation unit for treatment. Therefore, the system is adopted to treat COD and heavy metals in wastewater with different water qualities, secondary pollution is avoided, the occupied area is small, and the manufacturing cost is low.
In addition, the system for treating wastewater according to the above embodiment of the present invention may further have the following additional technical features:
optionally, when the detection device displays that the COD value is higher than 20000ppm, the control device closes the fifth directional valve and the third directional valve, and opens the fourth directional valve, the first directional valve and the second directional valve.
Optionally, when the detection device displays that the COD value is lower than 5000ppm, the control device closes the fourth directional valve, the first directional valve and the third directional valve, and opens the fifth directional valve and the second directional valve.
Optionally, when the detection device displays that the COD value is 15000-20000 ppm, the control device closes the fourth reversing valve and the second reversing valve, and opens the fifth reversing valve, the first reversing valve and the third reversing valve.
Optionally, when the detection device displays that the COD value is 5000-10000 ppm, 10000ppm is not included, the control device closes the fifth reversing valve, the first reversing valve and the third reversing valve, and opens the fourth reversing valve and the third reversing valve.
Optionally, when the detection device displays that the COD value is 10000-15000 ppm, the detection device does not include 15000ppm, the control device closes the fifth reversing valve, the second reversing valve and the third reversing valve, and opens the fourth reversing valve and the first reversing valve.
Optionally, the pressure oxidation unit comprises a preheating device, an autoclave and a flash evaporation device which are connected in sequence, the preheating device is connected with the first pipeline and the fourth pipeline, and the flash evaporation device is connected with the preheating device, the third pipeline and the first pipeline.
Optionally, the electrolytic gas flotation oxidation unit comprises: the top of the first tank body is provided with a first water inlet, the side wall of the first tank body is provided with a water outlet, the bottom of the first tank body is provided with a sludge discharge port, the first water inlet is connected with the first pipeline and the fifth pipeline, and the first water outlet is connected with the first pipeline and the second pipeline; the first electrode plate is arranged in the first tank body and comprises a first electrode plate and a second electrode plate, the first electrode plate and the second electrode plate extend from the side wall of the first tank body to the center of the first tank body, and the first electrode plate and the second electrode plate are alternately arranged to form a ring shape; the stirrer is arranged in a ring surrounded by the first electrode plate, and a stirring paddle is arranged on the stirrer; a first power source having a positive electrode and a negative electrode periodically switched and the positive electrode is periodically electrically connected to one of the first and second plates and the negative electrode is periodically electrically connected to the other of the first and second plates.
Optionally, the first tank body comprises a reaction zone and a settling zone from top to bottom, the first electrode plate is arranged in the reaction zone, the water inlet is arranged at the top of the reaction zone, and the water outlet is arranged on the side wall of the settling zone.
Optionally, the cross-sectional area of the reaction zone decreases gradually in a direction from top to bottom, and the sludge discharge port is provided at a lower end of the settling zone.
Optionally, the first plate and the second plate are mesh-shaped or porous.
Optionally, the first electrode plate and the second electrode plate are made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surface.
Optionally, the first electrode plate further includes a first conductive ring and a second conductive ring, the first conductive ring is disposed around the ring formed by the first electrode plate and the second electrode plate, and the first conductive ring is electrically connected to the first electrode plate, the second conductive ring is disposed around the ring formed by the first electrode plate and the second electrode plate, the second conductive ring is electrically connected to the second electrode plate, the positive electrode is periodically electrically connected to one of the first conductive ring and the second conductive ring, and the negative electrode is periodically electrically connected to the other of the first conductive ring and the second conductive ring.
Optionally, the first electrode plate is disposed coaxially with the agitator.
Optionally, the stirrer is connected with a stirring motor through a coupler.
Optionally, the stirrer is provided with a plurality of layers of stirring paddles along the length direction of the stirrer, and each layer of stirring paddles comprises a plurality of stirring paddles arranged along the circumferential direction of the stirrer at intervals.
Optionally, the electrolytic gas flotation oxidation unit comprises: a second water inlet is formed in the front end of the second tank body, a second water outlet is formed in the rear end of the second tank body, the second water inlet is connected with the first pipeline and the fifth pipeline, and the second water outlet is connected with the first pipeline and the second pipeline; the second electrode plate is arranged in the second tank body and comprises a third electrode plate and a fourth electrode plate, the third electrode plate and the fourth electrode plate are alternately arranged at intervals along the length direction of the second tank body, and openings are formed in the third electrode plate and the fourth electrode plate; and the positive electrode of the second power supply is electrically connected with one of the third polar plate and the fourth polar plate, and the negative electrode of the second power supply is electrically connected with the other one of the third polar plate and the fourth polar plate.
Optionally, the third plate and the fourth plate are mesh-shaped or porous.
Optionally, the third electrode plate and the fourth electrode plate are made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surfaces.
Optionally, the second power supply is a commutation power supply, a positive electrode of the commutation power supply is periodically and electrically connected with one of the third plate and the fourth plate, and a negative electrode of the commutation power supply is periodically and electrically connected with the other of the third plate and the fourth plate.
Optionally, the electrolytic gas flotation oxidation unit comprises: the first cover plate is provided with a water inlet nozzle, and the water inlet nozzle is connected with the first pipeline and the fifth pipeline; the second cover plate is opposite to the first cover plate and arranged at intervals, a water outlet nozzle is arranged on the second cover plate, and the water outlet nozzle is connected with the first pipeline and the second pipeline; a fifth polar plate, wherein a first hole area is formed on the fifth polar plate; a gasket is arranged between the sixth polar plate and the fifth polar plate, the fifth polar plate and the sixth polar plate are alternately arranged between the first cover plate and the second cover plate, a second hole area is formed on the sixth polar plate, the first hole area and the second hole area jointly define an electrolysis channel, and the electrolysis channel is communicated with the water inlet nozzle and the water outlet nozzle; a third power supply electrically connected with the fifth plate and the sixth plate.
Optionally, the fifth electrode plate comprises a first circular electrolysis portion and a first electrode lug portion which are connected, and the first hole region is arranged in the center of the first circular electrolysis portion.
Optionally, the sixth polar plate comprises a second circular electrolytic portion and a second polar ear portion connected, and the second hole region is arranged in the center of the second circular electrolytic portion.
Optionally, the first pole ear portion and the second pole ear portion are provided on one side or both sides of the electrolysis channel.
Optionally, the gasket mates with the first circular electrolytic portion or the second circular electrolytic portion.
Optionally, the fifth electrode plate and the sixth electrode plate are made of stainless steel, titanium, copper or titanium plated with noble metal or coated with a catalyst.
Optionally, the third power source is a dc commutating power source, and a positive electrode of the dc commutating power source is periodically electrically connected to one of the fifth plate and the sixth plate, and a negative electrode of the dc commutating power source is periodically electrically connected to the other of the fifth plate and the sixth plate.
Optionally, the electrolytic gas flotation oxidation unit further comprises: a fastening bolt connecting the first cover plate and the second cover plate.
Optionally, the electrolytic flocculation unit comprises: a third water inlet is formed in the top of the third tank body, a third water outlet is formed in the bottom of the third tank body, and the third water inlet is connected with the second pipeline and the third pipeline; the first electrolysis basket is arranged in the third tank body along the circumferential direction, is hollow and is filled with electrolysis materials, and is provided with an opening; the metal stirrer is arranged in the ring of the first electrolysis basket, and a stirring paddle is arranged on the metal stirrer; and the positive electrode of the fourth power supply is electrically connected with the first electrolytic basket, and the negative electrode of the fourth power supply is electrically connected with the metal stirrer.
Optionally, the first electrolytic basket is a ring-column-shaped structure with a hollow interior, and the opening is formed in the inner side wall and the outer side wall of the ring-column-shaped structure.
Optionally, the first electrolytic basket is disposed along the third cell body inner wall.
Optionally, the first electrolytic basket is made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surface.
Optionally, the first stirring basket is disposed coaxially with the metal stirrer.
Optionally, the electrolytic material is iron, copper, iron carbon alloy or aluminum.
Optionally, the metal stirrer is connected with a stirring motor through a coupler.
Optionally, the negative electrode of the fourth power source is electrically connected to the metal stirrer through a brush.
Optionally, a plurality of layers of the stirring paddles are arranged on the metal stirrer along the length direction of the metal stirrer, and each layer of the stirring paddles comprises a plurality of stirring paddles arranged along the circumferential direction of the metal stirrer at intervals.
Optionally, the electrolytic flocculation unit comprises: a fourth water inlet is formed in the front end of the fourth tank body, a fourth water outlet is formed in the rear end of the fourth tank body, and the fourth water inlet is connected with the second pipeline and the third pipeline;
the seventh polar plate is arranged inside the fourth groove body; the second electrolytic basket is arranged in the fourth tank body and positioned above the seventh polar plate, the second electrolytic basket is hollow and filled with electrolytic materials, and an opening is formed in the second electrolytic basket; and the positive electrode of the fifth power supply is electrically connected with the second electrolytic basket, and the negative electrode of the fifth power supply is electrically connected with the seventh polar plate.
Optionally, the seventh plate is mesh-like or porous.
Optionally, the seventh polar plate is made of stainless steel, titanium, copper or graphite.
Optionally, the second electrolytic basket is made of titanium or titanium alloy and then made of graphite.
Optionally, the electrolytic feed material includes at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy.
Optionally, the seventh plate is arranged inside the fourth tank body along the bottom parallel to the fourth tank body, and the seventh plate and the second electrolytic basket are arranged in parallel and at intervals.
Optionally, in the height direction of the fourth tank body, the fourth water inlet is arranged below the fourth water outlet.
Optionally, the electrolytic flocculation unit comprises: a fifth tank body, wherein a fifth water inlet is arranged at the front end of the fifth tank body, a fifth water outlet is arranged at the rear end of the fifth tank body, and the fifth water inlet is connected with the second pipeline and the third pipeline; the conductive piece group is arranged in the groove body and comprises a first conductive piece and a second conductive piece, the first conductive piece and the second conductive piece are arranged alternately at intervals along the length direction of the groove body, and open holes are formed in the first conductive piece and the second conductive piece; a sixth power supply, a positive electrode of which is electrically connected to one of the first conductive member and the second conductive member, and a negative electrode of which is electrically connected to the other of the first conductive member and the second conductive member, wherein the first conductive member is a third electrolytic basket, and the second conductive member is an eighth electrode plate; or the first conductive piece and the second conductive piece are both fourth electrolytic baskets.
Optionally, the eighth plate is mesh-shaped or porous.
Optionally, the eighth polar plate is made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surface.
Optionally, the third and fourth electrode baskets are hollow inside and filled with electrolytic material.
Optionally, the third and fourth electrolytic baskets are made of stainless steel, titanium alloy, copper, graphite or titanium plated noble metal.
Optionally, the electrolytic feed material includes at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy.
Optionally, in the height direction of the fifth tank body, the fifth water inlet is arranged below the fifth water outlet.
Optionally, the sixth power source is a commutating power source, a positive electrode of the commutating power source is periodically and electrically connected to one of the first conducting member and the second conducting member, and a negative electrode of the commutating power source is periodically and electrically connected to the other of the first conducting member and the second conducting member.
Optionally, the electrolytic flocculation unit comprises: a sixth water inlet is formed in the front end of the sixth tank body, a sixth water outlet is formed in the rear end of the sixth tank body, and the sixth water inlet is connected with the second pipeline and the third pipeline; the electrode plate group is arranged at the upstream in the sixth tank body and comprises ninth electrode plates and tenth electrode plates which are alternately arranged at intervals along the water flow direction in the sixth tank body, and first openings are formed in the ninth electrode plates and the tenth electrode plates; the electrolytic basket group is arranged in the sixth tank body and is positioned at the downstream of the electrode plate group, the electrolytic basket group comprises fifth electrolytic baskets and sixth electrolytic baskets, the fifth electrolytic baskets and the sixth electrolytic baskets are arranged at intervals and alternately, the fifth electrolytic baskets and the sixth electrolytic baskets are hollow and filled with electrolytic materials, and second openings are formed in the fifth electrolytic baskets and the sixth electrolytic baskets; a first commutating power supply, wherein the positive pole of the first commutating power supply is periodically and electrically connected with one of the ninth polar plate and the tenth polar plate, and the negative pole of the first commutating power supply is periodically and electrically connected with the other of the ninth polar plate and the tenth polar plate; a second reversing power supply having a positive electrode periodically electrically connected to one of the fifth and sixth electrolysis baskets and a negative electrode periodically electrically connected to the other of the fifth and sixth electrolysis baskets.
Optionally, the ninth plate and the tenth plate are mesh-shaped or porous.
Optionally, the ninth electrode plate and the tenth electrode plate are made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surfaces.
Optionally, the fifth and sixth electrolytic baskets are made of stainless steel, titanium alloy, copper, graphite or titanium plated noble metal.
Optionally, the electrolytic feed material includes at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy.
Optionally, the electrode plate group includes a plurality of the ninth electrode plates and a plurality of the tenth electrode plates, the plurality of ninth electrode plates are electrically connected to the first commutation power supply through a first circuit, and the plurality of tenth electrode plates are electrically connected to the first commutation power supply through a second circuit.
Optionally, the electrolysis basket set comprises a plurality of the fifth electrolysis baskets electrically connected to the second reversing power supply by a third circuit and a plurality of the sixth electrolysis baskets electrically connected to the second reversing power supply by a fourth circuit.
Optionally, the first circuit, the second circuit, the third circuit, and the fourth circuit are pure copper wires.
Optionally, in the height direction of the sixth tank body, the sixth water inlet is arranged below the sixth water outlet.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a system for treating wastewater according to one embodiment of the present invention;
FIG. 2 is a schematic view of a longitudinal sectional structure of an electrolytic air flotation oxidation unit in a system for treating wastewater according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a first electrode plate of an electrolytic air flotation oxidation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 4 is a schematic top view of an electrolytic air flotation oxidation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 5 is a schematic view showing a longitudinal sectional structure of an electrolytic air flotation oxidation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 6 is a schematic view showing the cross-sectional structure of an electrolytic air flotation oxidation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 7 is a schematic view of a fifth plate of an electrolytic air flotation oxidation unit in a system for treating wastewater according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a sixth plate of the electrolytic air flotation oxidation unit in the system for treating wastewater according to one embodiment of the present invention;
FIG. 9 is a schematic view of a gasket between a fifth plate and a sixth plate of an electrolytic air flotation oxidation unit in a system for treating wastewater according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a longitudinal cross-sectional structure of an electrolytic flocculation unit in a system for treating wastewater according to an embodiment of the present invention;
FIG. 11 is a schematic top view of an electrolytic flocculation unit in a system for treating wastewater according to yet another embodiment of the present invention;
FIG. 12 is a schematic view showing a longitudinal sectional structure of an electrolytic flocculation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 13 is a schematic top view of an electrolytic flocculation unit in a system for treating wastewater according to yet another embodiment of the present invention;
FIG. 14 is a schematic top view of an electrolytic flocculation unit in a system for treating wastewater according to yet another embodiment of the present invention;
FIG. 15 is a schematic top view of an electrolytic flocculation unit in a system for treating wastewater according to yet another embodiment of the present invention;
FIG. 16 is a schematic view showing a longitudinal sectional structure of an electrolytic flocculation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 17 is a schematic top view of an electrolytic flocculation unit in a system for treating wastewater according to yet another embodiment of the present invention;
FIG. 18 is a schematic view showing a longitudinal sectional structure of an electrolytic flocculation unit in a system for treating wastewater according to still another embodiment of the present invention;
FIG. 19 is a schematic top view of an electrolytic flocculation unit in a system for treating wastewater according to yet another embodiment of the present invention;
fig. 20 is a schematic view showing a longitudinal sectional structure of an electrolytic flocculation unit in a system for treating wastewater according to still another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In one aspect of the present invention, a system for treating wastewater is provided. According to an embodiment of the present invention, referring to fig. 1, the system includes: the device comprises a pressurization oxidation unit 100, an electrolytic air flotation oxidation unit 200, an electrolytic flocculation unit 300, a first pipeline 400, a second pipeline 500, a third pipeline 600, a detection device 700, a fourth pipeline 800, a fifth pipeline 900 and a control device 1000, wherein the first pipeline 400 is respectively connected with the pressurization oxidation unit 100 and the electrolytic air flotation oxidation unit 200, a first reversing valve 40 is arranged in the first pipeline 400, the second pipeline 500 is respectively connected with the electrolytic air flotation oxidation unit 200 and the electrolytic flocculation unit 300, and a second reversing valve 50 is arranged in the second pipeline 500; the third pipeline 600 is respectively connected with the pressure oxidation unit 100 and the electrolytic flocculation unit 300, and a third reversing valve 60 is arranged in the third pipeline 600; the detection device 700 comprises a waste water inlet 701 and a waste water outlet 702; the fourth pipeline 800 is respectively connected with the wastewater outlet 702 and the pressure oxidation unit 100, and a fourth reversing valve 80 is arranged in the fourth pipeline 800; the fifth pipeline 900 is respectively connected with the wastewater outlet 702 and the electrolytic air-flotation oxidation unit 200, and a fifth reversing valve 90 is arranged in the fifth pipeline 900; the control device 1000 is connected to the detection device 700, the first direction valve 40, the second direction valve 50, the third direction valve 60, the fourth direction valve 80, and the fifth direction valve 90, and the control device 1000 controls opening and closing of the first direction valve 40, the second direction valve 50, the third direction valve 60, the fourth direction valve 80, and the fifth direction valve 90 based on the display of the detection device 700. For example, when the detection device displays that the COD value is higher than 20000ppm, the control device closes the fifth reversing valve and the third reversing valve, and opens the fourth reversing valve, the first reversing valve and the second reversing valve, so that the wastewater passes through the detection device and then sequentially enters the pressure oxidation unit, the electrolytic air flotation oxidation unit and the electrolytic flocculation unit for treatment; when the detection device displays that the COD value is lower than 5000ppm, the control device closes the fourth reversing valve, the first reversing valve and the third reversing valve, and opens the fifth reversing valve and the second reversing valve, namely, the wastewater passes through the detection device and then sequentially enters the electrolytic air flotation oxidation unit and the electrolytic flocculation unit for treatment; when the detection device displays that the COD value is 15000-20000 ppm, the control device closes the fourth reversing valve and the second reversing valve, opens the fifth reversing valve, the first reversing valve and the third reversing valve, and then the wastewater passes through the detection device and then sequentially enters the electrolytic air flotation oxidation unit, the pressurization oxidation unit and the electrolytic flocculation unit for treatment; when the COD value of the detection device is 5000-10000 ppm, the detection device does not contain 10000ppm, the control device closes the fifth reversing valve, the first reversing valve and the third reversing valve, and opens the fourth reversing valve and the third reversing valve, namely, the wastewater passing through the detection device sequentially enters the pressure oxidation unit and the electrolytic flocculation unit for treatment; and when the detection device displays that the COD value is 10000-15000 ppm, the COD value does not include 15000ppm, the control device closes the fifth reversing valve, the second reversing valve and the third reversing valve, and opens the fourth reversing valve and the first reversing valve, namely, the wastewater passing through the detection device sequentially enters the pressurization oxidation unit and the electrolysis air flotation oxidation unit for treatment. It should be noted that the detection device is any device capable of directly detecting the COD of the wastewater on line in the prior art, and the control device is any device capable of controlling the opening of the valve in view of the display of the detection device, which is not repeated herein.
According to an embodiment of the present invention, the pressure oxidation unit 100 includes a preheating device (not shown), an autoclave (not shown), and a flash evaporation device (not shown) connected in sequence, the preheating device (not shown) being connected to the first pipe 400 and the fourth pipe 800, and the flash evaporation device (not shown) being connected to the preheating device 11, the third pipe 600, and the first pipe 400. Specifically, the autoclave is a vertical autoclave or a bedroom autoclave, wastewater supplied to a pressurized oxidation unit 100 firstly enters a preheating device 11 (any existing heat exchange device can be used for preheating), the wastewater is preheated and then is pumped into the autoclave through a pressure pump, and oxygen and an auxiliary agent are introduced for oxidation reaction, wherein the reaction temperature in the process is 110-250 ℃, the oxygen partial pressure is 0.1-1.0 MPa, the auxiliary agent is one or more selected from calcium hydroxide, potassium hydroxide, sodium hydroxide, magnesium hydroxide, calcium oxide, magnesium oxide, lithium hydroxide, hydrogen peroxide, sodium persulfate, sodium hypochlorite, sodium chlorate, potassium permanganate and the like, the addition amount of the auxiliary agent is 0.1-10 kg per ton of wastewater, the reaction time is controlled to be 0.5-3 hours, organic matters in the wastewater are oxidized into water and carbon dioxide, the obtained reacted liquid is supplied to a flash evaporation device for flash evaporation treatment, and (3) supplying steam (about 250 ℃) obtained after flash evaporation to a preheating device to be used as an indirect heating medium, and enabling the temperature of the wastewater after flash evaporation to be lower than 100 ℃ to enter the next operation flow.
According to an embodiment of the present invention, referring to fig. 2, the electrolytic air-flotation oxidation unit 200 includes a first tank body 1, a first electrode plate 2, a stirrer 3, and a power source 4.
The electrolytic air flotation oxidation unit 200 according to an embodiment of the present invention will be described in detail with reference to fig. 2 to 3.
According to the utility model discloses an embodiment, 1 top of first cell body is equipped with first water inlet 101, and the lateral wall of first cell body 101 is equipped with first delivery port 102, and 1 bottom of first cell body is equipped with mud discharging port 103, and first water inlet 101 links to each other with first pipeline 400 and fifth pipeline 900, and first delivery port 102 links to each other with first pipeline 400 and second pipeline 500. According to a specific embodiment of the present invention, referring to fig. 2, the first tank body 1 includes a reaction zone 14 and a settling zone 15 from top to bottom, and the first water inlet 101 is disposed at the top of the reaction zone 14. Specifically, the material of the first tank 1 is not particularly limited as long as the insulation effect can be achieved, for example, the FPR tank, the PVC tank, or the steel-lined rubber tank, and the shape of the first tank 1 is not particularly limited, for example, the reaction zone 14 may be cylindrical, the cross-sectional area of the settling zone 15 is gradually reduced, that is, the settling zone 15 is conical, and the sludge discharge port 103 is provided at the lower end of the settling zone 15. And referring to fig. 2, the lower part of the first tank body 1 is also provided with supporting legs 13.
According to the embodiment of the present invention, referring to fig. 2 and 3, the first electrode plate 2 is disposed in the first tank 1, the first electrode plate 2 includes the first electrode plate 21 and the second electrode plate 22, and the first electrode plate 21 and the second electrode plate 22 are both extended from the first tank 1 to the center of the first tank 1, and the first electrode plate 21 and the second electrode plate 22 are alternately disposed to form a ring. The inventor finds that the COD in the wastewater can be effectively removed by adopting the electrolytic pole plates which comprise the first pole plates and the second pole plates and are alternately arranged to form a ring, matching with a power supply, and enabling the wastewater fed into the first tank body to flow through the electrolytic pole plates under the action of the stirrer, namely the wastewater is subjected to electrolytic catalytic oxidation through the adjacent first pole plates and the adjacent second pole plates. Preferably, the first electrode plate 2 is disposed in the reaction zone 12. According to an embodiment of the present invention, the first plate 21 and the second plate 22 are net-shaped or porous, and are thus configured as net-shaped or porous plates, so that the wastewater can flow between the first plate and the second plate, thereby increasing the fluidity of the wastewater and electrolyzing the organic substances in the wastewater more thoroughly. Further, the first electrode plate 21 and the second electrode plate 22 are made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surface. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, noble metal, nickel oxide, or titanium oxide. The inventor finds that the polar plate made of the material does not generate chemical reaction and has good adaptability to waste water
According to the embodiment of the present invention, the stirrer 3 is disposed in the ring enclosed by the first electrode plate 2, and the stirring paddle 31 is disposed on the stirrer 3. Specifically, the stirrer 3 is arranged in a ring enclosed by the first electrode plate 2 and extends to the settling zone 15, and under the action of the stirrer, the wastewater supplied into the first tank body flows through the electrolysis electrode plate, that is, the wastewater is subjected to electrolytic catalytic oxidation through the adjacent first electrode plate and the second electrode plate, so that COD in the wastewater is effectively removed. Preferably, the agitator 3 is connected to an agitator motor 33 via a coupling 32. Further, be equipped with multilayer stirring rake 31 along its length direction on the agitator 3, every layer of stirring rake 31 includes a plurality of stirring rakes 31 of arranging along agitator circumference interval, all is equipped with stirring rake 31 in the length direction and the week of agitator 3 promptly to make the waste water that supplies to first cell body 1 under the effect of agitator 3 to flow through first polar plate 21 and second polar plate 22 and take place electrochemical reaction, effectively get rid of COD in the waste water. Further, referring to fig. 3, the first electrode plate 2 is coaxially disposed with the stirrer 3.
According to an embodiment of the present invention, the positive pole 41 and the negative pole 42 of the first power source 4 are periodically switched, and the positive pole 41 is periodically electrically connected to one of the first pole plate 21 and the second pole plate 22, and the negative pole 42 is periodically electrically connected to the other of the first pole plate 21 and the second pole plate 22. Specifically, the first power source 4 is a direct current power source with reversed positive and negative poles, the positive pole 41 of the first power source 4 is electrically connected with the first pole plate 21, the negative pole 42 of the first power source 4 is electrically connected with the second pole plate 22, during electrolysis, the first pole plate connected with the positive pole can oxidize organic matters in the wastewater to degrade the organic matters into small molecular substances and finally generate water and carbon dioxide, the second pole plate connected with the negative pole generates hydrogen, when reversing is needed (specifically, the adjustment can be carried out according to different wastewater qualities, such as 10-90 min), the positive pole 41 and the negative pole 42 of the first power source 4 are switched to enable the positive pole 41 of the first power source 4 to be electrically connected with the second pole plate 22, the negative pole 42 of the first power source 4 is electrically connected with the first pole plate 21, the first pole plate connected with the negative pole of the power source generates hydrogen, and the bubbles can clean the organic matters and other impurities adhered on the first pole plate, and the second polar plate connected with the positive pole of the power supply performs oxidation action on organic matters in the wastewater, and the steps are repeated and alternated.
Further, referring to fig. 3, the first electrode plate 2 further includes a first conductive ring 23 and a second conductive ring 24, the first conductive ring 23 is disposed around a ring surrounded by the first electrode plate 21 and the second electrode plate 22, and the first conductive ring 23 is electrically connected to the first electrode plate 21, the second conductive ring 24 is disposed around a ring surrounded by the first electrode plate 21 and the second electrode plate 22, and the second conductive ring 24 is electrically connected to the second electrode plate 22, that is, the first electrode plate 2 includes a plurality of first electrode plates 21 and a plurality of second electrode plates 22, the first conductive ring 23 is disposed around and electrically connected to the plurality of first electrode plates 21, the second conductive ring 24 is disposed around and electrically connected to the plurality of second electrode plates 22, the positive electrode 41 is periodically electrically connected to one of the first conductive ring 23 and the second conductive ring 24, and the negative electrode 42 is periodically electrically connected to the other of the first conductive ring 23 and the second conductive ring 24.
Specifically, after the device operates for a period of time, detect the COD of waste water in the first cell body, when it reduces below discharge standard, close the power, open first cell body bottom mud discharging port, discharge waste water.
According to still another embodiment of the present invention, referring to fig. 4, the electrolytic air-flotation oxidation unit 200 may include a second tank 5, a second electrode plate 6, and a second power supply 7.
The electrolytic air flotation oxidation unit 200 according to still another embodiment of the present invention will be described in detail with reference to FIGS. 4 to 5.
According to the utility model discloses an embodiment, second cell body 5 front end is equipped with second water inlet 501, the rear end of second cell body 5 is equipped with second delivery port 502, second water inlet 501 links to each other with first pipeline 400 and fifth pipeline 900, second delivery port 103 links to each other with first pipeline 400 and second pipeline 500, preferably, in the direction of height of second cell body 5, second water inlet 501 is established in second delivery port 502 below, waste water is advanced from top to bottom in second cell body 5 promptly, make waste water through establish in second water inlet 501 entering second cell body 5 of 5 anterior segments of second cell body bottom and cross flow second electrode board 6 in proper order, then discharge the cell body through establishing second delivery port 502 of 5 rear end upper ends of second cell body. According to the utility model discloses a specific embodiment, the material of second cell body 5 does not have special requirement, as long as can realize insulating effect can, for example for resin cell body, PVC cell body or concrete cell body.
According to the utility model discloses an embodiment, second electrode board 6 is established in second cell body 5, second electrode board 6 includes third polar plate 61 and fourth polar plate 62, third polar plate 61 and fourth polar plate 62 are along the length direction interval of cell body and arrange in turn to be equipped with trompil (not shown) on third polar plate 61 and the fourth polar plate 62, the waste water that gets into second cell body 5 through second water inlet 501 promptly crosses and flows second electrode board 6, and waste water is crossing third polar plate 61 and fourth polar plate 62 in-process and is reacted, thereby effectively reduce the COD in the waste water or get rid of impurity such as heavy metal in the waste water. According to a specific embodiment of the present invention, the second electrode plate 6 includes a plurality of third electrode plates 61 and a plurality of fourth electrode plates 62, that is, the openings of the plurality of third electrode plates 61 and the plurality of fourth electrode plates 62 jointly define the through-flow channel formed in the second electrode plate 6, and the third electrode plates 61 and the fourth electrode plates 62 are parallel to the front end or the rear end of the second groove 5.
Further, the third plate 61 and the fourth plate 62 are net-shaped or porous, that is, the grids and/or holes of the third plate 61 and the fourth plate 62 together form a flow passage, and the third plate 61 and the fourth plate 62 are made of stainless steel, titanium, copper, graphite or titanium-plated noble metal or coated with a catalyst on the surface. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, nickel oxide, or titanium oxide. The inventor finds that the electrode plate made of the material does not generate chemical reaction and has good adaptability to waste water.
According to an embodiment of the present invention, the positive electrode 71 of the second power source 7 is electrically connected to one of the third plate 61 and the fourth plate 62, and the negative electrode 72 of the second power source 7 is electrically connected to the other of the third plate 61 and the fourth plate 62. In accordance with one embodiment of the present invention, a reverse power supply, preferably a reverse power supply, is employed as the second power supply 7 in order to maintain the electrolytic activity of the group of conductive elements, as desired. Specifically, the anode 71 of the reversing power supply is electrically connected with the third polar plate 61, the cathode 72 of the second power supply 7 is electrically connected with the fourth polar plate 62, in the electrolysis process, oxygen generated by the third polar plate connected with the anode of the power supply can oxidize organic matters in the wastewater to generate water and carbon dioxide, the fourth polar plate connected with the cathode generates hydrogen, when the reversing is needed (specifically, the anode 71 and the cathode 72 of the second power supply 7 can be adjusted according to the wastewater quality, for example, 5-30 min), the anode 71 of the second power supply 7 is electrically connected with the fourth polar plate 62, the cathode 72 of the second power supply 7 is electrically connected with the third polar plate 61, the third polar plate connected with the cathode of the power supply generates hydrogen, the bubbles can clean the organic matters and other impurities adhered on the third polar plate, and the fourth polar plate connected with the anode of the power supply generates oxygen to oxidize the organic matters in the wastewater, this is repeated alternately.
According to still another embodiment of the present invention, referring to fig. 6, the electrolytic air flotation oxidation unit 200 may include a first cover plate 16, a second cover plate 17, a fifth polar plate 18, a sixth polar plate 19, and a third power supply 25.
The electrolytic air flotation oxidation unit 200 according to still another embodiment of the present invention will be described in detail with reference to FIGS. 6 to 9.
According to the utility model discloses an embodiment is equipped with into water injection well choke 161 on the first apron 16, and into water injection well choke 161 links to each other with first pipeline 400 and fifth pipeline 900, and is preferred, and into water injection well choke 161 establishes at the center of first apron 16 to first apron 16 can be PVC apron or metal covering board, can select according to actual need to this technical personnel in the field.
According to the utility model discloses an embodiment, second apron 17 and first apron 16 are relative and interval arrangement, and be equipped with out water injection well choke 171 on the second apron 17, it links to each other with first pipeline 400 and second pipeline 500 to go out water injection well choke 171, preferably, it establishes at the center of second apron 17 to go out water injection well choke 171, and first apron 16 and second apron 17 parallel arrangement, more preferably, water injection well choke 161 and play water injection well choke 171 position correspond, water injection well choke 161 and play water injection well choke 171 are for the regional symmetrical setting between first apron 16 and the second apron 17 promptly, and second apron 17 can be PVC apron or metal covering board, to this technical staff in the art can select according to actual need.
According to the embodiment of the present invention, the fifth plate 18 is formed with the first hole area 181, and specifically, the first hole area 181 may be a net or porous to ensure that the wastewater entering through the water inlet nozzle 161 flows through. According to an embodiment of the present invention, referring to fig. 7, the fifth plate 18 includes a first circular electrolytic portion 182 and a first lug portion 183 connected to each other, the first hole portion 181 is disposed at the center of the first circular electrolytic portion 182, and further, the fifth plate 18 is made of stainless steel, titanium, copper or titanium plated with noble metal or is surface-coated with catalyst. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, nickel oxide, or titanium oxide.
According to the embodiment of the utility model, be equipped with between sixth polar plate 19 and the fifth polar plate 18 gasket 184 and sixth polar plate 19 and fifth polar plate 18 and set up in turn between first apron 16 and second apron 17, form second hole region 191 on the sixth polar plate 19 to first hole region 181 and second hole region 191 are injectd electrolysis passageway 192 jointly, and electrolysis passageway 192 communicates with water injection well choke 161 and water outlet well choke 171. Specifically, the first cover plate 16 and the second cover plate 17 are provided with a plurality of fifth pole plates 18 and a plurality of sixth pole plates 19, the fifth pole plates 18 and the sixth pole plates 19 are alternately arranged, and a gasket 184 is arranged between the connected fifth pole plates 18 and the sixth pole plates 19. Like the fifth plate 18, the second hole area 191 of the sixth plate 19 may be a mesh or porous to ensure that the wastewater entering through the inlet nozzle 161 flows through. According to an embodiment of the present invention, referring to fig. 8, in the same way as the fifth pole plate 18, the sixth pole plate 19 includes a second circular electrolytic portion 193 and a second pole ear portion 194 connected to each other, the second hole area 191 is formed in the center of the second circular electrolytic portion 193, and further, the sixth pole plate 19 is made of stainless steel, titanium, copper or titanium plated with noble metal or is surface-coated with catalyst. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, nickel oxide, or titanium oxide. Preferably, the fifth polar plate 18 and the sixth polar plate 19 have the same structure, that is, the first hole area 181 of the fifth polar plate 18 and the second hole area 191 of the sixth polar plate 19 have the same size, and the first hole area 181 of the fifth polar plate 18 and the second hole area 191 of the sixth polar plate 19 correspondingly form an electrolysis channel 192, when the wastewater enters the electrolysis channel 192 through the water inlet nozzle 161 and flows through the electrolysis channel 192, the electrolysis catalytic oxidation occurs between the adjacent fifth polar plate 18 and sixth polar plate 19, so as to effectively remove the COD in the wastewater, and the wastewater after removal of the COD is discharged through the water outlet nozzle 171.
Further, referring to fig. 9, the gasket 184 is matched with the first circular electrolytic portion 182 or the second circular electrolytic portion 193, that is, the middle of the gasket 184 is provided with an opening 185 corresponding to the first hole region 181 and the second hole region 191, so as to insulate, space and seal the adjacent fifth pole plate 18 and the adjacent sixth pole plate 19, and the gasket is made of an insulating material conventionally used in the prior art, and a sealing material is provided between the fifth pole plate 18 or the sixth pole plate 19 adjacent to the first cover plate 16 and the first cover plate 16, and a sealing material is also provided between the fifth pole plate 18 or the sixth pole plate 19 adjacent to the second cover plate 17 and the second cover plate 17, so as to ensure the sealing performance of the device.
Further, referring to fig. 6, in order to fix the fifth pole plate 18 and the sixth pole plate 19, a fastening bolt 195 is used to connect the first cover plate 16 and the second cover plate 17, and the fastening bolt 195 may be plural, so that the fifth pole plate 18 and the sixth pole plate 19 are fixed therebetween by fixing the first cover plate 16 and the second cover plate 17.
Further, a first pole ear 183 and a second pole ear 194 are provided at one side or both sides of the electrolytic bath 192, and preferably, the first pole ear 183 and the second pole ear 194 are provided at both sides of the electrolytic bath 192, respectively.
According to the utility model discloses an embodiment, third power 25 is connected with fifth polar plate 18 and sixth polar plate 19 electricity to the messenger carries out electrolytic catalytic oxidation to the waste water of through-flow electrolysis passageway 192 under the power supply effect, thereby gets rid of the COD in the waste water.
According to a specific embodiment of the present invention, the third power source 25 is a dc commutating power source, the positive electrode 251 and the negative electrode 252 of the dc commutating power source are periodically switched, and the positive electrode 251 is periodically electrically connected to one of the fifth pole plate 18 and the sixth pole plate 19, and the negative electrode 252 is periodically electrically connected to the other of the fifth pole plate 18 and the sixth pole plate 19. Specifically, the anode 251 of the third power supply 25 is electrically connected with the fifth pole plate 18, the cathode 252 of the third power supply 25 is electrically connected with the sixth pole plate 19, during the electrolysis process, the oxygen generated by the fifth pole plate connected with the anode of the power supply can oxidize the organic matters in the wastewater to generate water and carbon dioxide, the sixth pole plate connected with the cathode generates hydrogen, when the direction needs to be changed (specifically, the direction can be adjusted according to the wastewater quality, for example, 5-90 min), the anode 251 and the cathode 252 of the third power supply 25 are switched to enable the anode 251 of the third power supply 25 to be electrically connected with the sixth pole plate 19, the cathode 252 of the third power supply 25 to be electrically connected with the fifth pole plate 18, the fifth pole plate connected with the cathode of the power supply generates hydrogen, the bubbles can clean the organic matters and other impurities adhered to the fifth pole plate, and the sixth pole plate connected with the anode of the power supply generates oxygen to oxidize the organic matters in the wastewater, this is repeated alternately.
According to an embodiment of the present invention, referring to fig. 10, the electrolytic flocculation unit 300 includes: a third tank 26, a first electrolytic basket 27, a metal stirrer 28 and a fourth power supply 29.
The electrolytic flocculation unit 300 according to an embodiment of the present invention is described in detail below with reference to fig. 10 to 11.
According to the utility model discloses an embodiment, third cell body 26 top is equipped with third inlet 261, and third cell body 26 bottom is equipped with third delivery port 262, and third inlet 261 links to each other with second pipeline 500 and third pipeline 600. Referring to fig. 10, in particular, the third water inlet 261 and the third water outlet 262 are oppositely arranged in the third tank 26, that is, the wastewater supplied through the third water inlet 261 is ensured to flow through the first electrolytic basket 27 and then is discharged through the third water outlet 262. According to a specific embodiment of the present invention, the material of the third groove 26 has no special requirement as long as the insulation effect can be achieved, for example, FPR groove, PVC groove or steel-lined rubber groove, and the shape of the third groove 26 is not particularly limited, for example, it may be a cylinder.
According to the utility model discloses an embodiment, first electrolysis basket 27 is established in third cell body 26 along the hoop, and the inside cavity of first electrolysis basket 27 and fill the electrolysis material, be equipped with trompil 271 on first electrolysis basket 27, even make waste water get into in the third cell body 26 back through the first electrolysis basket 27 of trompil 271 cross-flow, this electrolysis basket is under the effect of power positive pole, the electrolysis material wherein constantly dissolves out and combines to generate the adsorbent with the hydroxyl that the negative pole produced, impurity such as heavy metal in this adsorbent can effectively adsorb the waste water, thereby impurity such as heavy metal in the waste water is effectively got rid of. According to a specific embodiment of the present invention, the first electrolytic basket 27 is a hollow ring-shaped cylindrical structure, the electrolytic material is filled in the hollow structure, i.e. between the inner and outer side walls, the opening 271 is disposed on the inner and outer side walls of the ring-shaped cylindrical structure, and a plurality of openings 271 are disposed on the inner and outer side walls, thereby ensuring that the wastewater supplied to the third tank 26 can smoothly flow through the electrolytic basket through the plurality of openings 271 on the first electrolytic basket 27, preferably, the first electrolytic basket 27 is disposed along the inner wall of the third tank 26. Further, the first electrolytic basket 27 is made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with catalyst. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, nickel oxide, or titanium oxide. The inventor finds that the electrolytic basket made of the material does not generate chemical reaction per se and has good adaptability to waste water. In addition, the electrolytic material in the first electrolytic basket 27 is iron, copper, iron-carbon alloy or aluminum. Therefore, under the action of the positive electrode of the power supply, the electrolytic material in the substance is continuously dissolved out to react with the cathode to generate the adsorbent, and the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater.
According to the utility model discloses an embodiment, metal agitator 28 is established in first electrolysis basket 27's intra-annular to be equipped with stirring rake 281 on the metal agitator 28, thereby make the absorbent that produces in the electrolysis basket and impurity such as heavy metal in the waste water fully contact and in time discharge the result, keep the electrolytic activity of electrolysis unit. Preferably, the metal agitator 28 is connected to an agitator motor 283 via a shaft coupling 282. Further, be equipped with multilayer stirring rake 281 along its length direction on the metal agitator 28, every layer of stirring rake 281 includes a plurality of stirring rakes 281 along metal agitator circumference interval arrangement, all is equipped with the stirring rake promptly in the length direction and the week of metal agitator 28 upwards to guarantee that impurity such as heavy metal in adsorbent and the waste water fully contacts and in time discharges the result. Further, referring to fig. 11, the first electrolytic basket 27 is coaxially disposed with the metal stirrer 28. It should be noted that, those skilled in the art can select the material of the metal stirrer according to actual needs, as long as the conductive function is achieved.
According to an embodiment of the present invention, the positive pole 291 of the fourth power supply 29 is electrically connected to the first electrolytic basket 27 and the negative pole 292 of the power supply is electrically connected to the metal stirrer 28. Specifically, the metal agitator 28 serves as a cathode of the electrolysis device, where a reduction reaction occurs to generate hydroxyl ions, the first electrolysis basket 27 serves as an anode, the first electrolysis basket 27 is under the action of the anode 291 of the fourth power supply 29, the electrolytic material therein is continuously dissolved out to combine with the hydroxyl generated by the cathode to generate an adsorbent, for example, the electrolytic material is iron, the iron is under the action of the anode of the power supply to generate an oxidation reaction to obtain ferrous ions, the ferrous ions are combined with the hydroxyl generated by the cathode to form ferrous hydroxide, the ferrous hydroxide can effectively adsorb impurities such as heavy metals in the wastewater, and the product is timely discharged under the stirring action of the metal agitator, so as to maintain the electrolytic activity of the electrolysis unit, effectively reduce the tank voltage, enter the aeration device through the water outlet to be aerated, and fully adsorb the impurities such as heavy metals in the wastewater. Preferably, the negative pole 292 of the fourth power supply 29 is electrically connected to the metal stirrer 28 through a brush 293. Therefore, the stirring function of the metal stirrer can be realized, and the metal stirrer can be used as an electrolytic cathode, so that the cost of the device is saved. Specifically, the power supply may be a direct current power supply conventionally used in the art.
According to an embodiment of the present invention, referring to fig. 12, the electrolytic flocculation unit 300 includes: a fourth trough 34, a seventh plate 35, a second electrolytic basket 36 and a fifth power supply 37.
The electrolytic flocculation unit 300 according to still another embodiment of the present invention will be described in detail with reference to fig. 12 to 13.
According to the utility model discloses an embodiment, fourth cell body 34 front end is equipped with fourth water inlet 341, and the rear end of fourth cell body 34 is equipped with fourth delivery port 342, and fourth water inlet 341 links to each other with second pipeline 500 and third pipeline 600. Preferably, in the height direction of the fourth tank 34, the fourth water inlet 341 is disposed below the fourth water outlet 342, that is, the wastewater enters and goes out from the fourth tank 34, so that the wastewater enters the fourth tank 34 through the fourth water inlet 341 disposed at the bottom of the front section of the fourth tank 34 and sequentially flows between the seventh plate 35 and the second electrolytic basket 36, and then is discharged from the tank through the fourth water outlet 342 disposed at the upper end of the rear end of the fourth tank 34 to enter the aeration device for aeration and adsorption of impurities such as heavy metals. According to the utility model discloses a specific embodiment, the material of fourth cell body 34 does not have special requirement, as long as can realize insulating effect can, for example for resin cell body, PVC cell body or concrete cell body.
According to the embodiment of the present invention, the seventh plate 35 is disposed inside the fourth groove 34, preferably, the seventh plate 35 is disposed inside the fourth groove 34 along the bottom parallel to the fourth groove 34, and during the electrolysis process, the seventh plate 35 is connected to the negative electrode of the power supply and the water around the seventh plate 35 is subjected to a reduction reaction to generate hydrogen and hydroxyl ions (2H)2O+2e-＝H2+2OH-) And the hydroxide ions and metal ions which are continuously dissolved out from the electrolytic material generated in the electrolytic basket are combined to generate an adsorbent, the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater, and the hydrogen generated by the electrode plate forms an air floatation effect, so that the adsorbent adsorbing the impurities such as the heavy metals floats upwards along with the gas, and the electrolytic activity of the electrolytic basket is maintained.
Further, the seventh plate 35 is mesh-shaped or porous. Specifically, the net-shaped or porous electrode plate is beneficial to the flow of water, so that the electrolysis process is more thorough and the efficiency is higher. And the seventh polar plate 35 is made of stainless steel, titanium, copper, or graphite.
According to the utility model discloses an embodiment, second electrolysis basket 36 is established inside fourth cell body 34 and is located seventh polar plate 35 top, and the inside cavity of second electrolysis basket 36 and fill the electrolysis material, be equipped with trompil 361 on second electrolysis basket 36, the electrolysis material in the production constantly dissolves out the hydroxyl that produces with the negative pole and combines to generate the adsorbent, this adsorbent can effectively adsorb impurity such as heavy metal in the waste water, and the hydrogen that the plate electrode produced forms the air supporting effect, thereby make the adsorbent that adsorbs impurity such as heavy metal float up along with gas, finally get into aeration equipment aeration and adsorb impurity such as heavy metal from the delivery port.
Specifically, the second electrolytic basket 36 is a square structure with a hollow inside, and electrolytic material is filled in the hollow structure, and the second electrolytic basket 36 is arranged in parallel and spaced with the seventh plate 35, and a plurality of openings 361 are locally provided on each face of the second electrolytic basket 36.
Further, the second electrolytic basket 36 is made of titanium or titanium alloy and then made of graphite. The electrolytic basket of this type does not itself react chemically and is highly adaptable to wastewater and the electrolytic material in the second electrolytic basket 36 comprises at least one of pure aluminum, pure iron, pure zinc, carbon steel and iron-carbon alloy. Therefore, under the action of the positive electrode of the power supply, the electrolytic material in the substance is continuously dissolved out to react with the cathode to generate the adsorbent, and the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater. According to an embodiment of the present invention, the positive pole 371 of the fifth power source 37 is electrically connected to the second electrolytic basket 36, and the negative pole 372 of the fifth power source 37 is electrically connected to the seventh plate 35. Specifically, the power supply may be a direct current power supply conventionally used in the art.
According to a further embodiment of the present invention, with reference to fig. 14, the electrolytic flocculation unit 300 comprises: a fifth slot 43, a set of conductive elements 44 and a sixth power supply 45.
A further embodiment of an electrolytic flocculation unit 300 is described in detail below with reference to figures 14-18.
According to the utility model discloses an embodiment, fifth cell body 43 front end is equipped with fifth water inlet 431, and the rear end of fifth cell body 43 is equipped with fifth delivery port 432, and fifth water inlet 431 links to each other with second pipeline 500 and third pipeline 600. Preferably, in the height direction of the fifth tank 43, the fifth water inlet 431 is arranged below the fifth water outlet 432, that is, the wastewater enters and exits from the inside of the fifth tank 43 from bottom to top, so that the wastewater enters the fifth tank 43 through the fifth water inlet 431 arranged at the bottom of the front section of the fifth tank 43 and sequentially flows through the conductive element group 44, and then is discharged out of the tank through the fifth water outlet 432 arranged at the upper end of the rear end of the fifth tank 43. According to the utility model discloses a specific embodiment, the material of fifth cell body 43 does not have special requirement, as long as can realize insulating effect can, for example for resin cell body, PVC cell body or concrete cell body.
According to the utility model discloses an embodiment, the conducting element group 44 is established in fifth cell body 43, conducting element group 44 includes first electrically conductive 441 and second electrically conductive 442, first electrically conductive 441 and second electrically conductive 442 are along the length direction interval of cell body and arrange in turn to be equipped with trompil (not shown) on first electrically conductive 441 and the second electrically conductive 442, the waste water that gets into fifth cell body 43 through fifth water inlet 431 flows conducting element group 44 promptly, and waste water is in the first electrically conductive 441 of flow-through and the second electrically conductive 442 in-process takes place the reaction, thereby effectively reduce COD in the waste water or get rid of impurity such as heavy metal in the waste water. According to an embodiment of the present invention, the conductive member group 44 includes a plurality of first conductive members 441 and a plurality of second conductive members 442, that is, the openings of the plurality of first conductive members 441 and the plurality of second conductive members 442 jointly define a through-flow channel in the conductive member group 44, and the first conductive members 441 and the second conductive members 442 are both parallel to the front end or the rear end of the fifth slot 43.
According to another embodiment of the present invention, referring to fig. 15-16, the first conductive member 441 is a third electrolytic basket 443, the second conductive member 442 is an eighth electrode plate 444, the third electrolytic basket 443 connected to the positive electrode of the sixth power supply 45 is under the action of the positive electrode of the power supply, the electrolytic material therein is continuously dissolved out and combined with hydroxyl generated by the eighth electrode plate 444 as the negative electrode to generate an adsorbent, the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater, and the wastewater flowing through the third electrolytic basket 443 can timely take away reaction products, thereby maintaining the activity of the conductive member group.
According to another embodiment of the present invention, referring to fig. 17-18, the first conductive member 441 and the second conductive member 442 are the third electrolytic basket 443, that is, the wastewater flows through the conductive member set 44, the wastewater flows through the third electrolytic basket 443, the electrolytic basket connected to the positive electrode of the sixth power supply 45 is under the action of the positive electrode of the power supply, the electrolytic material therein is continuously dissolved out and combined with hydroxyl generated by the electrolytic basket as the negative electrode to generate an adsorbent, the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater, and the flowing wastewater can timely take away the reaction product, thereby maintaining the activity of the electrolytic basket.
Furthermore, the eighth electrode plate 444 is mesh-shaped or porous, that is, the meshes and/or holes on the eighth electrode plate 444 together form flow channels, and the eighth electrode plate 444 is made of stainless steel, titanium, copper, graphite or titanium-plated noble metal or is coated with a catalyst on the surface. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, nickel oxide, or titanium oxide. The inventor finds that the electrode plate made of the material does not generate chemical reaction and has good adaptability to waste water.
Further, the third electrolytic basket 443 is a square structure with a hollow interior, the electrolytic material is filled in the hollow structure, and the third electrolytic basket 443 is made of stainless steel, titanium alloy, copper, graphite or titanium-plated noble metal. The inventors have found that the electrolytic basket of this type does not react chemically by itself and is highly adaptable to waste water and that the electrolytic material in the third electrolytic basket 443 comprises at least one of pure aluminum, pure iron, pure zinc, carbon steel and iron-carbon alloy. Therefore, under the action of the positive electrode of the power supply, the electrolytic material in the substance is continuously dissolved out to react with the cathode to generate the adsorbent, and the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater.
According to an embodiment of the present invention, the positive electrode 31 of the sixth power source 45 is electrically connected to one of the first and second conductive members 441 and 442, and the negative electrode 32 of the sixth power source 45 is electrically connected to the other of the first and second conductive members 441 and 442. According to an embodiment of the present invention, in order to maintain the electrolytic activity of the conductive member group, a reverse power may be used as needed, and preferably, when the first conductive member 441 and the second conductive member 442 are both the third electrolytic basket 443, a reverse power is used.
Specifically, taking the first conducting device 441 and the second conducting device 442 as an example of the third electrolysis basket 443, the sixth power supply 45 is a direct current power supply with reversed polarity, the positive electrode 31 of the sixth power supply 45 is electrically connected with the third electrolysis basket 443 as the first conducting device 441, the negative electrode 32 of the sixth power supply 45 is electrically connected with the third electrolysis basket 443 as the second conducting device 442, the electrolytic material in the third electrolysis basket 443 as the first conducting device 441 is dissolved and combined with hydroxyl ions generated from the third electrolysis basket 443 as the second conducting device 442 to form a flocculating agent, the flocculating agent adsorbs impurities such as heavy metals in the wastewater, after 5-30 min, the positive electrode 451 and the negative electrode 452 of the sixth power supply 45 are switched, so that the positive electrode 451 of the sixth power supply 45 is electrically connected with the third electrolysis basket 443 as the first conducting device 441, the negative electrode 452 of the sixth power supply 45 is electrically connected with the third electrolysis basket 443 as the second conducting device 442, the electrolytic material in the third electrolytic basket 443 as the first conductive member 441 dissolves and combines with the hydroxyl ions generated from the third electrolytic basket 443 as the second conductive member 442 to form a flocculating agent, and the impurities such as heavy metals in the wastewater are continuously adsorbed. When the first conductive member 441 is the third electrolytic basket 443 and the second conductive member 442 is the eighth electrode plate 444, the positive electrode 451 of the sixth power supply 45 is always electrically connected to the third electrolytic basket 443, and the negative electrode 452 of the sixth power supply 45 is always electrically connected to the eighth electrode plate 444.
According to another embodiment of the present invention, referring to fig. 19, the electrolytic flocculation unit 300 comprises: a sixth tank 53, an electrode plate group 54, an electrolysis basket group 55, a first reversing power supply 56 and a second reversing power supply 57.
An electrolytic flocculation unit 300 according to another embodiment of the present invention is described in detail below with reference to fig. 19 to 20.
According to the utility model discloses an embodiment, sixth cell body 53 front end is equipped with sixth water inlet 531, and the rear end of sixth cell body 53 is equipped with sixth delivery port 532, and sixth water inlet 531 links to each other with second pipeline 500 and third pipeline 600. Preferably, in the height direction of the sixth tank 53, the sixth water inlet 531 is arranged below the sixth water outlet 532, that is, the wastewater enters and goes out from the sixth tank 53, so that the wastewater enters the sixth tank 53 through the sixth water inlet 531 arranged at the bottom of the front section of the sixth tank 53 and sequentially flows through the electrode plate group 54 and the electrolytic basket group 55, and then is discharged out of the tank through the sixth water outlet 532 arranged at the upper end of the rear end of the sixth tank 53 to enter the aeration device for aeration and adsorption of impurities such as heavy metals. According to the utility model discloses a specific embodiment, the material of sixth cell body 53 does not have special requirement, as long as can realize insulating effect can, for example for resin cell body, PVC cell body or concrete cell body.
According to the utility model discloses an embodiment, the upper reaches of electrode plate group 54 in sixth cell body 53 are established, this electrode plate group 54 is close to sixth water inlet 531 setting promptly, electrode plate group 54 includes along the interior rivers direction interval of sixth cell body 53 and alternate arrangement's ninth polar plate 541 and tenth polar plate 542, and have on ninth polar plate 541 and the tenth polar plate 542 and be equipped with first trompil (not shown), the waste water that gets into sixth cell body 53 through sixth water inlet 531 at first flows through electrode plate group 54, and waste water takes place electrolytic catalytic oxidation in the process of flowing through ninth polar plate 541 and tenth polar plate 542, thereby effectively get rid of the COD in the waste water. According to a specific embodiment of the present invention, the electrode plate group 54 includes a plurality of ninth electrode plates 541 and a plurality of tenth electrode plates 542, that is, the openings of the plurality of ninth electrode plates 541 and the plurality of tenth electrode plates 542 jointly define the flow through channel in the electrode plate group 54, and the ninth electrode plates 541 and the tenth electrode plates 542 are net-shaped or porous, and the ninth electrode plates 541 and the tenth electrode plates 542 are parallel to the front end or the rear end of the sixth groove 53.
Further, the ninth electrode plate 541 and the tenth electrode plate 542 are made of stainless steel, titanium, copper, graphite, or titanium plated with a noble metal, or coated with a catalyst. The catalyst may be any substance that does not participate in the reaction, such as lead dioxide, nickel oxide, or titanium oxide. The inventor finds that the polar plate made of the material does not generate chemical reaction and has good adaptability to waste water.
According to the embodiment of the present invention, the electrolytic basket set 55 is disposed in the sixth trough 53 and located at the downstream of the electrode plate set 54, the electrolytic basket set 55 comprises a fifth electrolytic basket 551 and a sixth electrolytic basket 552, the fifth electrolytic basket 551 and the sixth electrolytic basket 552 are spaced and arranged alternately, and the fifth and sixth electrolysis baskets 551 and 552 are hollow and filled with electrolytic materials, the fifth and sixth electrolysis baskets 551 and 552 are provided with second openings (not shown), that is, the wastewater passing through the current passing electrode plate group 54 passes through the electrolytic basket group, and the wastewater passes through the fifth electrolytic basket 551 and the second electrode basket 32, and the electrolytic basket connected with the positive electrode of the power supply is under the action of the positive electrode of the power supply, the electrolytic material is continuously dissolved out and combined with hydroxide radicals generated by an electrolytic basket serving as a cathode to generate an adsorbent, and the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater. Therefore, the device can obviously reduce COD of the wastewater and remove impurities such as heavy metals in the wastewater.
According to an embodiment of the present invention, the electrolysis basket group 55 comprises a plurality of fifth electrolysis baskets 551 and a plurality of sixth electrolysis baskets 552, i.e. the openings of the plurality of fifth electrolysis baskets 551 and the plurality of sixth electrolysis baskets 552 together define a flow through channel within the electrolysis basket group 55. Specifically, the fifth and sixth electrolysis baskets 551 and 552 have a square structure with a hollow interior, the electrolytic material is filled in the hollow structure, and the fifth and sixth electrolysis baskets 551 and 552 are parallel to the ninth and tenth electrode plates 541 and 542.
Further, the fifth and sixth electrolytic baskets 551 and 552 are made of stainless steel, titanium alloy, copper, graphite, or titanium-plated noble metal. The inventor finds that the electrolytic basket made of the material is stable in chemical property, does not participate in reaction and is low in cost. In addition, the electrolytic material in the fifth and sixth electrolytic baskets 551 and 552 includes at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy. Therefore, under the action of the positive electrode of the power supply, the electrolytic material in the substance is continuously dissolved out to react with the cathode to generate the adsorbent, and the adsorbent can effectively adsorb impurities such as heavy metals in the wastewater.
According to an embodiment of the present invention, the positive electrode 561 of the first commutation power source 56 is periodically electrically connected to one of the ninth plate 541 and the tenth plate 542, and the negative electrode 562 of the first commutation power source 56 is periodically electrically connected to the other of the ninth plate 541 and the tenth plate 542. Specifically, the first reversing power supply 56 is a direct current power supply with reversed positive and negative poles, the positive pole 561 of the first reversing power supply 56 is electrically connected with the ninth pole plate 541, the negative pole 562 of the first reversing power supply 56 is electrically connected with the tenth pole plate 542, during electrolysis, oxygen generated by the ninth pole plate connected with the positive pole of the power supply can oxidize organic matters in the wastewater to generate water and carbon dioxide, the tenth pole plate connected with the negative pole generates hydrogen, when reversing is needed (specifically, the reversing can be adjusted according to different wastewater qualities, such as 5-90 min), the positive pole 561 and the negative pole 562 of the first reversing power supply 56 are switched, so that the positive pole 561 of the first reversing power supply 56 is electrically connected with the tenth pole plate 542, the negative pole 562 of the first reversing power supply 56 is electrically connected with the ninth pole plate 541, hydrogen is generated by the ninth pole plate connected with the negative pole of the power supply, and the bubbles can clean organic matters and other impurities adhered to the ninth pole plate, and the tenth electrode plate connected with the positive electrode of the power supply generates oxygen to oxidize organic matters in the wastewater, and the steps are repeated and alternated.
Further, the electrode plate group 54 includes a plurality of ninth electrode plates 541 and a plurality of tenth electrode plates 542, the plurality of ninth electrode plates 541 are electrically connected to the first commutation power source 56 through the first circuit 543, the plurality of tenth electrode plates 542 are electrically connected to the first commutation power source 56 through the second circuit 544, and the first circuit 543 and the second circuit 544 are both pure copper wires.
According to an embodiment of the present invention, the positive pole 571 of the second reverse power supply 57 is periodically electrically connected to one of the fifth electrolysis basket 551 and the sixth electrolysis basket 552, and the negative pole 572 of the second reverse power supply 57 is periodically electrically connected to the other of the fifth electrolysis basket 551 and the sixth electrolysis basket 552. Specifically, the second reversing power supply 57 is a direct current power supply with reversed positive and negative poles, the positive pole 571 of the second reversing power supply 57 is electrically connected with the fifth electrolysis basket 551, the negative pole 572 of the second reversing power supply 57 is electrically connected with the sixth electrolysis basket 552, the electrolytic material in the fifth electrolysis basket 551 is dissolved and combined with hydroxide ions generated by the sixth electrolysis basket 552 to form a flocculant, the flocculant adsorbs impurities such as heavy metals in the wastewater, when reversing is required (specifically, the reversing can be adjusted according to the quality of the wastewater, for example, for 5 to 90min), the positive pole 571 and the negative pole 572 of the second reversing power supply 57 are switched, so that the positive pole 571 of the second reversing power supply 57 is electrically connected with the sixth electrolysis basket 552, the negative pole 572 of the second reversing power supply 57 is electrically connected with the fifth electrolysis basket 551, at this time, the electrolytic material in the sixth electrolysis basket 552 is dissolved and combined with the hydroxide ions generated by the fifth electrolysis basket 551 to form the flocculant, continuously adsorbing impurities such as heavy metals in the wastewater.
Further, the electrolytic basket group 55 comprises a plurality of fifth electrolytic baskets 551 and a plurality of sixth electrolytic baskets 552, the plurality of fifth electrolytic baskets 551 is electrically connected to the second reversal power source 57 through a third circuit 553, and the plurality of sixth electrolytic baskets 552 is electrically connected to the second reversal power source 57 through a fourth circuit 554.
The direct current density in the electrolytic air-flotation oxidation unit is 50-1000A/m2The retention time of the wastewater is 0.5 to 3 hours, and the direct current density in the electrolytic flocculation unit is 50 to 1000A/m2The retention time of the wastewater is 0.5-3 hours.
According to the utility model discloses system for handle waste water is through setting up detection device, this detection device detects the COD content in the influent water, and feed back the detection data to controlling means, this controlling means is based on opening and closing of the valve on the COD detected value control pipeline in the waste water, thereby can select different treatment methods according to different quality of water, for example, when detection device shows that the COD value is higher than 20000ppm, controlling means closes fifth switching-over valve and third switching-over valve, open fourth switching-over valve, first switching-over valve and second switching-over valve, even make waste water get into pressurization oxidation unit, electrolysis air supporting oxidation unit and electrolysis flocculation unit after detection device in proper order and handle; when the detection device displays that the COD value is lower than 5000ppm, the control device closes the fourth reversing valve, the first reversing valve and the third reversing valve, and opens the fifth reversing valve and the second reversing valve, namely, the wastewater passes through the detection device and then sequentially enters the electrolytic air flotation oxidation unit and the electrolytic flocculation unit for treatment; when the detection device displays that the COD value is 15000-20000 ppm, the control device closes the fourth reversing valve and the second reversing valve, opens the fifth reversing valve, the first reversing valve and the third reversing valve, and then the wastewater passes through the detection device and then sequentially enters the electrolytic air flotation oxidation unit, the pressurization oxidation unit and the electrolytic flocculation unit for treatment; when the COD value of the detection device is 5000-10000 ppm, the detection device does not contain 10000ppm, the control device closes the fifth reversing valve, the first reversing valve and the third reversing valve, and opens the fourth reversing valve and the third reversing valve, namely, the wastewater passing through the detection device sequentially enters the pressure oxidation unit and the electrolytic flocculation unit for treatment; and when the detection device displays that the COD value is 10000-15000 ppm, the COD value does not include 15000ppm, the control device closes the fifth reversing valve, the second reversing valve and the third reversing valve, and opens the fourth reversing valve and the first reversing valve, namely, the wastewater passing through the detection device sequentially enters the pressurization oxidation unit and the electrolysis air flotation oxidation unit for treatment. Therefore, the system is adopted to treat COD and heavy metals in wastewater with different water qualities, secondary pollution is avoided, the occupied area is small, and the manufacturing cost is low.
It should be noted that, a person skilled in the art can select the electrolytic air flotation oxidation unit and the electrolytic flocculation unit according to the above requirements, and any combination of the above types of the electrolytic air flotation oxidation unit and the electrolytic flocculation unit also falls within the protection scope of the present application.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Example 1
And (3) treating the garbage leachate before biochemistry: and (3) supplying the wastewater to a detection device, wherein the detection device displays that the COD value is 24000ppm, the control device closes the fifth reversing valve and the third reversing valve, opens the fourth reversing valve, the first reversing valve and the second reversing valve, and the wastewater sequentially enters a pressurization oxidation unit, an electrolysis air flotation oxidation unit and an electrolysis flocculation unit for treatment after passing through the detection device.
(1) The pressure oxidation unit includes: the system comprises a preheating device, an autoclave and a flash evaporation device which are sequentially connected, wherein the autoclave is a vertical autoclave, wastewater supplied to a pressure oxidation unit firstly enters the preheating device to be preheated, the wastewater is preheated and then is pumped into the autoclave through a pressure pump, and oxygen and an auxiliary agent are introduced to carry out oxidation reaction, wherein the reaction temperature in the process is 150 ℃, the oxygen partial pressure is 6MPa, the auxiliary agent is sodium hydroxide, the addition amount of the auxiliary agent is 1kg per ton of wastewater, the reaction time is controlled to be 0.5h, so that organic matters in the wastewater are oxidized into water and carbon dioxide, the obtained reacted liquid is supplied to the flash evaporation device to carry out flash evaporation treatment, steam (about 250 ℃) obtained after flash evaporation is supplied to the preheating device to serve as an indirect heating medium, and the temperature of the wastewater after flash evaporation is lower than 100 ℃;
(2) an electrolytic air flotation oxidation unit: the structure is shown in FIG. 4, wherein the third and fourth plates are both cathode and anode coated with Ru or Ir in titanium mesh with current density of 300A/m2The electrolysis time is 0.5 h;
(3) electrolytic flocculation unit: the structure is shown in figure 10, the first electrolytic basket is made of carbon steel, and the current density is 100A/m2The electrolysis time is 0.5h, and the aeration time is 10 min. Finally discharging COD in the wastewater through an outlet of the electrolytic air-flotation oxidation unit<50ppm。
Example 2
Treating anhydrous sodium sulphate crystallization mother liquor: supplying the wastewater to a detection device, wherein the detection device displays that the COD value is 18000ppm, the control device closes the fourth reversing valve and the second reversing valve, opens the fifth reversing valve, the first reversing valve and the third reversing valve, and the wastewater sequentially enters the electrolytic air flotation oxidation unit, the pressurization oxidation unit and the electrolytic flocculation unit for treatment after passing through the detection device
(1) An electrolytic air flotation oxidation unit: the structure is shown in FIG. 4, wherein the third plate and the fourth plate are both cathode and anode coated with ruthenium and iridium in titanium mesh, and the current density is 800A/m2The electrolysis time is 2 h;
adopting groove type electrolysis, wherein the cathode and the anode are both titanium meshes coated with ruthenium and iridium, the current density is 800A/m2, and the electrolysis time is 2h
(2) The pressure oxidation unit includes: the system comprises a preheating device, an autoclave and a flash evaporation device which are sequentially connected, wherein the autoclave is a vertical autoclave, wastewater supplied to a pressure oxidation unit firstly enters the preheating device to be preheated, the wastewater is preheated and then is pumped into the autoclave through a pressure pump, and oxygen and an auxiliary agent are introduced to carry out oxidation reaction, wherein the reaction temperature in the process is 150 ℃, the oxygen partial pressure is 4MPa, the auxiliary agent is sodium hydroxide, the addition amount of the auxiliary agent is 1kg per ton of wastewater, the reaction time is controlled to be 0.5h, so that organic matters in the wastewater are oxidized into water and carbon dioxide, the obtained reacted liquid is supplied to the flash evaporation device to be subjected to flash evaporation treatment, steam (about 250 ℃) obtained after flash evaporation is supplied to the preheating device to serve as an indirect heating medium, and the temperature of the wastewater after flash evaporation is lower than 100 ℃;
(3) electrolytic flocculation unit: the structure is shown in figure 12, the second electrolytic basket is made of carbon steel, the electrolytic material is iron, the seventh polar plate is made of stainless steel, and the current density is 100A/m2The electrolysis time is 0.5h, and the aeration time is 10 min. Finally discharging COD in the wastewater through an outlet of the electrolytic air-flotation oxidation unit<50ppm。
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A system for treating wastewater, comprising:
a pressure oxidation unit;
an electrolytic air flotation oxidation unit;
an electrolytic flocculation unit;
the first pipeline is respectively connected with the pressurization oxidation unit and the electrolytic air flotation oxidation unit, and a first reversing valve is arranged in the first pipeline;
the second pipeline is respectively connected with the electrolytic air flotation oxidation unit and the electrolytic flocculation unit, and a second reversing valve is arranged in the second pipeline;
the third pipeline is respectively connected with the pressure oxidation unit and the electrolytic flocculation unit, and a third reversing valve is arranged in the third pipeline;
a detection device comprising a wastewater inlet and a wastewater outlet;
the fourth pipeline is respectively connected with the wastewater outlet and the pressure oxidation unit, and a fourth reversing valve is arranged in the fourth pipeline;
the fifth pipeline is respectively connected with the wastewater outlet and the electrolytic air flotation oxidation unit, and a fifth reversing valve is arranged in the fifth pipeline;
and the control device is connected with the detection device, the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve and the fifth reversing valve, and controls the first reversing valve, the second reversing valve, the third reversing valve, the fourth reversing valve and the fifth reversing valve to be opened and closed based on the display of the detection device.
2. The system according to claim 1, wherein the control device is adapted to selectively control the opening or closing of the first, second, third, fourth and fifth directional valves according to the COD value displayed by the detection device.
3. The system according to claim 1 or 2, wherein the pressure oxidation unit comprises a preheating device, an autoclave and a flashing device connected in sequence, the preheating device being connected to the first pipeline and the fourth pipeline, and the flashing device being connected to the preheating device, the third pipeline and the first pipeline.
4. The system according to claim 1 or 2, characterized in that said electrolytic gas-flotation oxidation unit comprises:
the top of the first tank body is provided with a first water inlet, the side wall of the first tank body is provided with a first water outlet, the bottom of the first tank body is provided with a sludge discharge port, the first water inlet is connected with the first pipeline and the fifth pipeline, and the first water outlet is connected with the first pipeline and the second pipeline;
the first electrode plate is arranged in the first tank body and comprises a first electrode plate and a second electrode plate, the first electrode plate and the second electrode plate extend from the side wall of the first tank body to the center of the first tank body, and the first electrode plate and the second electrode plate are alternately arranged to form a ring shape;
the stirrer is arranged in a ring surrounded by the first electrode plate, and a stirring paddle is arranged on the stirrer;
a first power source, the positive and negative electrodes of which are periodically switched and the positive electrode is periodically electrically connected with one of the first and second plates, and the negative electrode is periodically electrically connected with the other of the first and second plates;
optionally, the first tank body comprises a reaction zone and a settling zone from top to bottom, the first electrode plate is arranged in the reaction zone, the first water inlet is arranged at the top of the reaction zone, and the first water outlet is arranged on the side wall of the settling zone;
optionally, the cross-sectional area of the reaction zone is gradually reduced along the direction from top to bottom, and the sludge discharge port is arranged at the lower end of the settling zone;
optionally, the first plate and the second plate are mesh-shaped or porous;
optionally, the first polar plate and the second polar plate are made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with catalysts on the surfaces;
optionally, the first electrode plate further comprises a first conductive ring and a second conductive ring, the first conductive ring is disposed around the ring formed by the first electrode plate and the second electrode plate, and the first conductive ring is electrically connected with the first electrode plate, the second conductive ring is disposed around the ring formed by the first electrode plate and the second electrode plate, the second conductive ring is electrically connected with the second electrode plate, the positive electrode is periodically electrically connected with one of the first conductive ring and the second conductive ring, and the negative electrode is periodically electrically connected with the other of the first conductive ring and the second conductive ring;
optionally, the first electrode plate is disposed coaxially with the agitator;
optionally, the stirrer is connected with a stirring motor through a coupler;
optionally, the stirrer is provided with a plurality of layers of stirring paddles along the length direction of the stirrer, and each layer of stirring paddles comprises a plurality of stirring paddles arranged along the circumferential direction of the stirrer at intervals.
5. The system according to claim 1 or 2, characterized in that said electrolytic gas-flotation oxidation unit comprises:
a second water inlet is formed in the front end of the second tank body, a second water outlet is formed in the rear end of the second tank body, the second water inlet is connected with the first pipeline and the fifth pipeline, and the second water outlet is connected with the first pipeline and the second pipeline;
the second electrode plate is arranged in the second tank body and comprises a third electrode plate and a fourth electrode plate, the third electrode plate and the fourth electrode plate are alternately arranged at intervals along the length direction of the second tank body, and openings are formed in the third electrode plate and the fourth electrode plate;
a second power supply, wherein the positive electrode of the second power supply is electrically connected with one of the third polar plate and the fourth polar plate, and the negative electrode of the second power supply is electrically connected with the other of the third polar plate and the fourth polar plate;
optionally, the third plate and the fourth plate are mesh-shaped or porous;
optionally, the third polar plate and the fourth polar plate are made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with catalysts on the surfaces;
optionally, the second power supply is a commutation power supply, a positive electrode of the commutation power supply is periodically and electrically connected with one of the third plate and the fourth plate, and a negative electrode of the commutation power supply is periodically and electrically connected with the other of the third plate and the fourth plate.
6. The system according to claim 1 or 2, characterized in that said electrolytic gas-flotation oxidation unit comprises:
the first cover plate is provided with a water inlet nozzle, and the water inlet nozzle is connected with the first pipeline and the fifth pipeline;
the second cover plate is opposite to the first cover plate and arranged at intervals, a water outlet nozzle is arranged on the second cover plate, and the water outlet nozzle is connected with the first pipeline and the second pipeline;
a fifth polar plate, wherein a first hole area is formed on the fifth polar plate;
a gasket is arranged between the sixth polar plate and the fifth polar plate, the fifth polar plate and the sixth polar plate are alternately arranged between the first cover plate and the second cover plate, a second hole area is formed on the sixth polar plate, the first hole area and the second hole area jointly define an electrolysis channel, and the electrolysis channel is communicated with the water inlet nozzle and the water outlet nozzle;
a third power supply electrically connected to the fifth and sixth electrode plates;
optionally, the fifth electrode plate comprises a first circular electrolysis part and a first electrode lug part which are connected, and the first hole area is arranged at the center of the first circular electrolysis part;
optionally, the sixth polar plate comprises a second circular electrolytic part and a second polar lug part which are connected, and the second hole area is arranged at the center of the second circular electrolytic part;
optionally, the first pole lug part and the second pole lug part are arranged on one side or two sides of the electrolysis channel;
optionally, the gasket mates with the first circular electrolytic portion or the second circular electrolytic portion;
optionally, the fifth polar plate and the sixth polar plate are made of stainless steel, titanium, copper or titanium plated with noble metal or coated with a catalyst on the surface respectively and independently;
optionally, the third power source is a dc commutating power source, and a positive electrode of the dc commutating power source is periodically electrically connected to one of the fifth plate and the sixth plate, and a negative electrode of the dc commutating power source is periodically electrically connected to the other of the fifth plate and the sixth plate;
optionally, the electrolytic gas flotation oxidation unit further comprises: a fastening bolt connecting the first cover plate and the second cover plate.
7. The system according to claim 1 or 2, wherein the electrolytic flocculation unit comprises:
a third water inlet is formed in the top of the third tank body, a third water outlet is formed in the bottom of the third tank body, and the third water inlet is connected with the second pipeline and the third pipeline;
the first electrolysis basket is arranged in the third tank body along the circumferential direction, is hollow and is filled with electrolysis materials, and is provided with an opening;
the metal stirrer is arranged in the ring of the first electrolysis basket, and a stirring paddle is arranged on the metal stirrer;
a fourth power supply having a positive electrode electrically connected to the first electrolytic basket and a negative electrode electrically connected to the metal agitator;
optionally, the first electrolytic basket is of an annular cylindrical structure with a hollow interior, and the opening is formed in the inner side wall and the outer side wall of the annular cylindrical structure;
optionally, the first electrolytic basket is disposed along the third tank inner wall;
optionally, the first electrolytic basket is made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surface;
optionally, the first electrolysis basket is disposed coaxially with the metal agitator;
optionally, the electrolytic material is iron, copper, iron-carbon alloy or aluminum;
optionally, the metal stirrer is connected with a stirring motor through a coupler;
optionally, the negative electrode of the fourth power source is electrically connected to the metal stirrer through a brush;
optionally, a plurality of layers of the stirring paddles are arranged on the metal stirrer along the length direction of the metal stirrer, and each layer of the stirring paddles comprises a plurality of stirring paddles arranged along the circumferential direction of the metal stirrer at intervals.
8. The system according to claim 1 or 2, wherein the electrolytic flocculation unit comprises:
a fourth water inlet is formed in the front end of the fourth tank body, a fourth water outlet is formed in the rear end of the fourth tank body, and the fourth water inlet is connected with the second pipeline and the third pipeline;
the seventh polar plate is arranged inside the fourth groove body;
the second electrolytic basket is arranged in the fourth tank body and positioned above the seventh polar plate, the second electrolytic basket is hollow and filled with electrolytic materials, and an opening is formed in the second electrolytic basket;
a fifth power supply, wherein the positive electrode of the fifth power supply is electrically connected with the second electrolytic basket, and the negative electrode of the fifth power supply is electrically connected with the seventh polar plate;
optionally, the seventh plate is mesh-shaped or porous;
optionally, the seventh polar plate is made of stainless steel, titanium, copper and graphite;
optionally, the second electrolytic basket is made of titanium or titanium alloy and then made of graphite;
optionally, the electrolytic feed material comprises at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy;
optionally, the seventh plate is arranged inside the fourth tank body along the bottom parallel to the fourth tank body, and the seventh plate and the second electrolytic basket are arranged in parallel and at intervals;
optionally, in the height direction of the fourth tank body, the fourth water inlet is arranged below the fourth water outlet.
9. The system according to claim 1 or 2, wherein the electrolytic flocculation unit comprises:
a fifth tank body, wherein a fifth water inlet is arranged at the front end of the fifth tank body, a fifth water outlet is arranged at the rear end of the fifth tank body, and the fifth water inlet is connected with the second pipeline and the third pipeline;
the conductive piece group is arranged in the groove body and comprises a first conductive piece and a second conductive piece, the first conductive piece and the second conductive piece are arranged alternately at intervals along the length direction of the groove body, and open holes are formed in the first conductive piece and the second conductive piece;
a sixth power supply having a positive electrode electrically connected to one of the first and second conductive members and a negative electrode electrically connected to the other of the first and second conductive members,
the first conductive piece is a third electrolytic basket, and the second conductive piece is an eighth polar plate; or
The first conductive piece and the second conductive piece are fourth electrolytic baskets;
optionally, the eighth plate is mesh-shaped or porous;
optionally, the eighth polar plate is made of stainless steel, titanium, copper, graphite or titanium plated with noble metal or coated with a catalyst on the surface;
optionally, the third and fourth electrolysis baskets are hollow inside and filled with electrolytic material;
optionally, the third and fourth electrolytic baskets are made of stainless steel, titanium alloy, copper, graphite or titanium plated noble metal;
optionally, the electrolytic feed material comprises at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy;
optionally, in the height direction of the fifth tank body, the fifth water inlet is arranged below the fifth water outlet;
optionally, the sixth power source is a commutating power source, a positive electrode of the commutating power source is periodically and electrically connected to one of the first conducting member and the second conducting member, and a negative electrode of the commutating power source is periodically and electrically connected to the other of the first conducting member and the second conducting member.
10. The system according to claim 1 or 2, wherein the electrolytic flocculation unit comprises:
a sixth water inlet is formed in the front end of the sixth tank body, a sixth water outlet is formed in the rear end of the sixth tank body, and the sixth water inlet is connected with the second pipeline and the third pipeline;
the electrode plate group is arranged at the upstream in the sixth tank body and comprises ninth electrode plates and tenth electrode plates which are alternately arranged at intervals along the water flow direction in the sixth tank body, and first openings are formed in the ninth electrode plates and the tenth electrode plates;
the electrolytic basket group is arranged in the sixth tank body and is positioned at the downstream of the electrode plate group, the electrolytic basket group comprises fifth electrolytic baskets and sixth electrolytic baskets, the fifth electrolytic baskets and the sixth electrolytic baskets are arranged at intervals and alternately, the fifth electrolytic baskets and the sixth electrolytic baskets are hollow and filled with electrolytic materials, and second openings are formed in the fifth electrolytic baskets and the sixth electrolytic baskets;
a first commutating power supply, wherein the positive pole of the first commutating power supply is periodically and electrically connected with one of the ninth polar plate and the tenth polar plate, and the negative pole of the first commutating power supply is periodically and electrically connected with the other of the ninth polar plate and the tenth polar plate;
a second reversing power supply, a positive electrode of the second reversing power supply being periodically electrically connected to one of the fifth and sixth electrolysis baskets, and a negative electrode of the first reversing power supply being periodically electrically connected to the other of the fifth and sixth electrolysis baskets;
optionally, the ninth plate and the tenth plate are mesh-shaped or porous;
optionally, the ninth polar plate and the tenth polar plate are made of stainless steel, titanium, copper, graphite or titanium plated with noble metals or coated with catalysts on the surfaces;
optionally, the fifth and sixth electrolysis baskets are made of stainless steel, titanium alloy, copper, graphite or titanium plated noble metal;
optionally, the electrolytic feed material comprises at least one of pure aluminum, pure iron, pure zinc, carbon steel, and iron-carbon alloy;
optionally, the electrode plate group includes a plurality of ninth electrode plates and a plurality of tenth electrode plates, the plurality of ninth electrode plates are electrically connected to the first commutation power supply through a first circuit, and the plurality of tenth electrode plates are electrically connected to the first commutation power supply through a second circuit;
optionally, the electrolysis basket set comprises a plurality of the fifth electrolysis baskets electrically connected to the second reversing power supply by a third circuit and a plurality of the sixth electrolysis baskets electrically connected to the second reversing power supply by a fourth circuit;
optionally, the first circuit, the second circuit, the third circuit, and the fourth circuit are pure copper wires;
optionally, in the height direction of the sixth tank body, the sixth water inlet is arranged below the sixth water outlet.
CN201921389962.5U 2019-08-23 2019-08-23 System for treating wastewater Active CN211688632U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110436681A (en) * 2019-08-23 2019-11-12 中国恩菲工程技术有限公司 The system for handling waste water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110436681A (en) * 2019-08-23 2019-11-12 中国恩菲工程技术有限公司 The system for handling waste water
CN110436681B (en) * 2019-08-23 2024-05-28 中国恩菲工程技术有限公司 System for treating wastewater

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