CN111620434A - Wastewater treatment device and method and application thereof - Google Patents
Wastewater treatment device and method and application thereof Download PDFInfo
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- CN111620434A CN111620434A CN202010514826.5A CN202010514826A CN111620434A CN 111620434 A CN111620434 A CN 111620434A CN 202010514826 A CN202010514826 A CN 202010514826A CN 111620434 A CN111620434 A CN 111620434A
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 35
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- 239000003054 catalyst Substances 0.000 claims abstract description 101
- 238000006243 chemical reaction Methods 0.000 claims abstract description 99
- 239000002351 wastewater Substances 0.000 claims abstract description 78
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 59
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- 239000013530 defoamer Substances 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 34
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 description 26
- 230000003197 catalytic effect Effects 0.000 description 22
- 238000012856 packing Methods 0.000 description 14
- 230000009471 action Effects 0.000 description 12
- 238000006385 ozonation reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000005243 fluidization Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
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- 238000011161 development Methods 0.000 description 2
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- 150000003384 small molecules Chemical class 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 150000002989 phenols Chemical class 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The embodiment of the invention provides a wastewater treatment device and method and application thereof, relating to the technical field of wastewater treatment. The wastewater treatment device comprises a first water flow circulation reaction part, a second water flow circulation reaction part and a complete catalytic reaction part; the first water flow circulation reaction part comprises a first shell, a first catalyst container and a baffling connecting pipe, and the second water flow circulation reaction part comprises a second shell, a second catalyst container and a baffling baffle; the first catalyst container and the first shell enclose a first water flow circulation channel; and a second water flow circulation channel is enclosed by the second catalyst container and the second shell, a water flow conveying channel is enclosed between the outer wall of the baffling baffle and the second shell, and the water flow conveying channel is communicated with the complete catalytic reaction part. The wastewater treatment method comprises the step of treating wastewater by adopting the device. The device and the method have the advantages of high ozone utilization rate, high oxidation reaction efficiency, high wastewater treatment degree and low energy consumption, and are very suitable for being applied to pretreatment of refractory wastewater or advanced treatment of biochemical wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment device and method and application thereof.
Background
With the rapid development of industry, the discharge amount of industrial wastewater is increasing day by day, the components are more complex, and the water contains a plurality of organic matters which are difficult to degrade, such as phenols, cyanogen compounds, polycyclic aromatic hydrocarbon compounds, heterocyclic compounds, polychlorinated biphenyl and the like, so that the pollution of natural water is aggravated, the health of people is seriously threatened, and the development of social economy is restricted. The industrial wastewater comprises pharmaceutical wastewater, coal chemical wastewater, pulping wastewater, oil refining wastewater and the like, has the characteristics of high biotoxicity, antibacterial substance content, poor biodegradability and the like, and is difficult to treat organic wastewater with poor biodegradability and relatively high molecular mass by using the conventional biological treatment method. The Advanced Oxidation Process (AOP) can directly mineralize the organic matters or improve the biodegradability of pollutants through oxidation, has great advantages in the aspect of processing trace harmful chemical substances such as environmental hormones and the like, can completely mineralize or decompose most organic matters, and has good application prospects. The advanced oxidation technique generally includes a photocatalytic oxidation method, a Fenton oxidation method, an electrochemical oxidation method, an ozone oxidation method, a catalytic wet oxidation method, a radiation oxidation method, etc., depending on the oxidizing agent used and the catalytic conditions.
The ozone oxidation method is an advanced oxidation method which is widely applied in the wastewater treatment at present, and is divided into a direct oxidation method and an indirect oxidation method, wherein the direct oxidation method is that dissolved ozone molecules directly react with organic pollutants, has higher selectivity and low oxidation efficiency, and is difficult to thoroughly purify the wastewater; the indirect oxidation method is also called an ozone catalytic oxidation method, and is characterized in that ozone forms hydroxyl radicals under the action of a catalyst, and the hydroxyl radicals have higher reaction rate with organic matters, stronger oxidability and no selectivity. The catalytic ozonation technology is divided into homogeneous catalytic ozonation and heterogeneous catalytic ozonation. Heterogeneous catalysis ozonation is the organic combination of three processes of pure ozonation, catalyst adsorption and catalysis for generating hydroxyl radicals to remove pollutants, pollutants with different polarities and different reaction activities can be treated respectively, the defects of strong selectivity and high cost of hydroxyl radical oxidation of pure ozonation are overcome, and the method has the advantages of low treatment cost, good effect and no secondary pollution.
In China, research aiming at catalytic ozone oxidation mostly focuses on the aspects of catalyst research and development and optimization technology, most reaction towers still adopt conventional packed towers, bubble towers and other equipment, the mass transfer rate of ozone is not high enough, the problems of blockage, foam and the like are easy to occur, the actual utilization rate of ozone is low, and the treatment cost is high.
In view of this, the present application is specifically made.
Disclosure of Invention
The invention aims to provide a wastewater treatment device and method and application thereof.
Embodiments of the invention may be implemented as follows:
in a first aspect, the invention provides a wastewater treatment device, which comprises a reaction tower, wherein the reaction tower comprises a multistage catalytic reaction part and a complete catalytic reaction part which are communicated with each other from bottom to top, the multistage catalytic reaction part comprises at least two water flow circulation reaction parts which are communicated in sequence, and the multistage catalytic reaction part comprises a first water flow circulation reaction part positioned at the lowermost end of the reaction tower and a second water flow circulation reaction part communicated with the complete catalytic reaction part;
the first water flow circulation reaction part comprises a first shell, a first catalyst container and a horn-shaped baffling connecting pipe, the baffling connecting pipe is provided with a large head end and a small head end, and the second water flow circulation reaction part comprises a second shell, a second catalyst container and a conical baffling baffle;
the first catalyst container is positioned in the first shell, a first water flow circulating channel is defined by the outer wall of the first catalyst container and the inner wall of the first shell, the big end of the baffling connecting pipe is covered above the first catalyst container, a first water flow circulating gap is formed between the big end of the baffling connecting pipe and the upper edge of the first catalyst container, the first water flow circulating gap is communicated with the first water flow circulating channel, the first water flow circulating channel is communicated with the bottom of the first catalyst container, and the small end of the baffling connecting pipe is communicated with the bottom of the second catalyst container;
the second catalyst container is positioned in the second shell, a second water flow circulation channel is enclosed by the outer wall of the second catalyst container and the inner wall of the second shell, the baffle plate covers the second catalyst container and forms a second water flow circulation gap with the upper edge of the second catalyst container, the second water flow circulation gap is communicated with the second water flow circulation channel, the second water flow circulation channel is communicated with the bottom of the second catalyst container, a water flow conveying channel is enclosed between the outer wall of the baffle plate and the second shell and is communicated with the complete catalytic reaction part, and the water flow conveying channel is also communicated with the second water flow circulation channel.
In an optional embodiment, the bottom of the reaction tower is provided with a water distributor, and a water outlet of the water distributor is communicated with the lower end of the first catalyst container;
in an optional embodiment, the wastewater treatment device further comprises an ozone generator, a gas-liquid mixing pump and a wastewater inlet pipe, wherein the ozone generator and the wastewater inlet pipe are communicated with the gas-liquid mixing pump, and the gas-liquid mixing pump is communicated with the water distributor.
In an optional embodiment, a water outlet is arranged on the side wall of the top of the complete catalytic reaction part, and a water collector is arranged on the top of the complete catalytic reaction part and communicated with the water outlet.
In an alternative embodiment, the wastewater treatment apparatus further comprises an ozone destructor in communication with the top of the complete catalytic reaction section.
In an alternative embodiment, the top of the complete catalytic reaction section is also provided with a defoamer;
in an alternative embodiment, the top of the complete catalytic reaction section is also provided with a pressure equalization valve.
In an alternative embodiment, the upper portion of the side wall of each water circulation reaction part and the upper portion of the side wall of the complete catalytic reaction part are provided with sampling ports.
In a second aspect, embodiments of the present invention provide a wastewater treatment method, including performing wastewater treatment by using the wastewater treatment apparatus provided in any of the above embodiments.
In an alternative embodiment, a wastewater treatment process comprises:
filling an ozone catalyst in each water flow circulation reaction part and each complete catalytic reaction part to form a catalyst filling layer;
introducing a gas-liquid mixture of ozone and wastewater to the bottom of the first water flow circulation reaction part;
discharging treated water from the upper part of the complete catalytic reaction part;
in an alternative embodiment, the ozone is present in the gas-liquid mixture in bubble sizes of 20-60 μm.
In an alternative embodiment, the particle size of the catalyst filled in the first water circulation reaction part is larger than that of the catalyst filled in the second water circulation reaction part;
in an alternative embodiment, the catalyst filled in the first water circulation reaction part has a particle size of 5 to 8mm, and the catalyst filled in the second water circulation reaction part has a particle size of 3 to 5 mm.
In a third aspect, the present invention provides a wastewater treatment device and a wastewater treatment method provided by any of the above embodiments, and provides applications of the wastewater treatment device and the wastewater treatment method provided by any of the above embodiments in pretreatment of refractory wastewater or advanced treatment of wastewater after biochemical treatment;
in alternative embodiments, the refractory wastewater BOD/COD is less than 0.1;
in an alternative embodiment, the post-biochemical wastewater COD is less than 200 mg/L.
The embodiment of the invention has the beneficial effects that:
according to the wastewater treatment device obtained through the design, part of wastewater forms an internal circulation fluidization state under the action of the outer wall of the first catalyst container and the baffling connecting pipe in the first water flow circulation reaction part, part of wastewater forms an internal circulation fluidization state under the action of the outer wall of the second catalyst container and the baffling baffle in the second water flow circulation reaction part, and ozone molecules can fully participate in the reaction under the condition of segmented multistage treatment, so that the ozone utilization rate is improved, the oxidation reaction efficiency is improved, and the wastewater can be completely oxidized in a catalytic mode. The structure of the device provided by the invention ensures that the internal circulation of the water flow does not need additional power, and the treatment cost of the whole system is not increased while the full catalytic oxidation of the wastewater is ensured. The wastewater treatment method designed by the invention has the advantages because the device provided by the invention is used for wastewater treatment. The wastewater treatment device and the method provided by the invention are very suitable for pretreatment of refractory wastewater or advanced treatment of biochemical wastewater.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of a wastewater treatment apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a wastewater treatment apparatus according to an embodiment of the present invention.
Icon: 100-a wastewater treatment plant; 101-a reaction tower; 102-an ozone generator; 103-gas-liquid mixing pump; 104-a wastewater inlet pipe; 105-a catalyst packing layer; 110-a multi-stage catalytic reaction part; 110 a-a first water flow circulation reaction part; 110 b-a second water-circulating reaction part; 111-a first housing; 112-a first catalyst container; 113-a baffling connecting pipe; 114-first water flow circulation gap; 115-a first water circulation channel; 121-a second housing; 122-a second catalyst vessel; 123-baffle plate; 124-second water circulation gap; 125-a second water circulation channel; 126-water flow delivery channel; 130-complete catalytic reaction section; 131-a water outlet; 132-a defoamer; 133-a pressure balancing valve; 140-a water distributor; 150-a water collector; 160-ozone destructor; 170-a sampling port; 180-a sewage draining outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 and fig. 2, the present embodiment provides a wastewater treatment apparatus 100, in which a reaction tower 101 includes, from bottom to top, a multi-stage catalytic reaction part 110 and a complete catalytic reaction part 130 which are communicated with each other, the multi-stage catalytic reaction part 110 includes at least two water circulation reaction parts which are sequentially communicated with each other, and the multi-stage catalytic reaction part includes a first water circulation reaction part 110a located at the lowermost end of the reaction tower and a second water circulation reaction part 110b communicated with the complete catalytic reaction part 130;
the first water circulation reaction part 110a includes a first housing 111, a first catalyst container 112, and a baffle connection pipe 113 having a horn shape, the baffle connection pipe 113 having a large head end and a small head end. The second water circulation reaction part 110b includes a second housing 121, a second catalyst container 122, and a baffle 123 having a tapered shape;
the first catalyst container 112 is positioned in the first shell 111, a first water flow circulation channel 115 is enclosed by the outer wall of the first catalyst container 112 and the inner wall of the first shell 111, the large end of the baffling connecting pipe 113 is capped above the first catalyst container 112, a first water flow circulation gap 114 is formed between the large end of the baffling connecting pipe 113 and the upper edge of the first catalyst container 112, the first water flow circulation gap 114 is communicated with the first water flow circulation channel 115, the first water flow circulation channel 115 is communicated with the bottom of the first catalyst container 112, and the small end of the baffling connecting pipe 113 is communicated with the bottom of the second catalyst container 122;
the second catalyst container 122 is located in the second housing 121, a second water circulation channel 125 is defined by the outer wall of the second catalyst container 122 and the inner wall of the second housing 121, the baffle plate 123 covers the second catalyst container 122, a second water circulation gap 124 is formed between the upper edge of the second catalyst container 122 and the outer wall of the second catalyst container 122, the second water circulation gap 124 is communicated with the second water circulation channel 125, the second water circulation channel 125 is communicated with the bottom of the second catalyst container 122, a water transport channel 126 is defined between the outer wall of the baffle plate 123 and the second housing 121, the water transport channel 126 is communicated with the complete catalytic reaction part 130, and the water transport channel 126 is further communicated with the second water circulation channel 125.
In the preferred embodiment of the present invention, the multi-stage catalytic reaction part 110 includes only two water circulation reaction parts, i.e., the first water circulation reaction part 110a and the second water circulation reaction part 110b, in order to save process flow and simplify the apparatus under the condition of ensuring that the water treatment meets the requirement of the effluent quality.
In other embodiments of the present invention, the multi-stage catalytic reaction part 110 may further include three or more water circulation reaction parts sequentially connected to each other, and the water circulation reaction parts other than the second water circulation reaction part 110b connected to the complete catalytic reaction part 130 are all connected to the first water circulation reaction part 110 a. The specific setting data of the water circulation reaction part can be selected according to the actual treated wastewater quantity and the wastewater quality condition.
The device provided by the invention is mainly used for carrying out pretreatment on refractory wastewater or advanced treatment on biochemical wastewater by an ozone oxidation method. In use, the first water circulation reaction part 110a, the second water circulation reaction part 110b and the complete catalytic reaction part 130 are filled with a catalyst packing. Introducing a gas-liquid mixture of ozone and wastewater into the reaction tower 101, wherein the gas-liquid mixture firstly passes through the catalyst packing layer 105 (reaction zone I) of the first water flow circulation reaction part 110a, one part of the wastewater subjected to the primary catalytic oxidation reaction flows back to the lower end of the first catalyst container 112 from the first water flow circulation gap 114 through the first water flow circulation channel 115 and enters the catalyst packing layer 105 again for circular catalytic oxidation, and the other part enters the second water flow circulation reaction part 110b through the small end of the baffling connecting pipe 113; the wastewater entering the second water circulation reaction part 110b passes through the corresponding catalyst packing layer 105 (reaction zone ii) and is catalytically oxidized again under the action of ozone, a part of the wastewater subjected to the secondary oxidation treatment flows back to the lower end of the second catalyst container 122 from the second water circulation gap 124 through the second water circulation channel 125 and enters the catalyst packing layer 105 again for cyclic catalytic oxidation, the other part of the wastewater enters the complete catalytic reaction part 130 through the water flow conveying channel 126, and the wastewater is discharged after being completely catalytically oxidized through the catalyst packing layer 105 (reaction zone iii) in the complete catalytic reaction part 130.
The surface of the large-particle-size ozone catalyst can adsorb macromolecular organic matters and ozone molecules, the ozone molecules are catalyzed into high-oxidability hydroxyl radicals, and the hydroxyl radicals can rapidly oxidize the macromolecular organic matters into micromolecular organic matters or directly mineralize small parts into CO2And water. The reaction zone I is mainly used for converting macromolecular organic matters into micromolecular organic matters. The micromolecular organic matter in the wastewater in the reaction zone II and hydroxyl free radicals converted by ozone molecules under the action of the catalyst are subjected to oxidation reaction to generate CO2And water. The reaction zone III is mainly used for completely mineralizing the incompletely reacted organic matters and converting the incompletely reacted organic matters into CO2And water.
The specific structure arrangement in the device provided by the invention is that partial waste water forms an internal circulation fluidization state under the action of the outer wall of the first catalyst container 112 and the baffling connecting pipe 113 in the first water flow circulation reaction part 110a, partial waste water forms an internal circulation fluidization state under the action of the outer wall of the second catalyst container 122 and the baffling baffle 123 in the second water flow circulation reaction part 110b, and ozone molecules can fully participate in the reaction under the condition of sectional multi-stage treatment, so that the ozone utilization rate is improved, the oxidation reaction efficiency is improved, and the waste water can be ensured to be completely oxidized in a catalytic manner. The structure of the device provided by the invention ensures that the internal circulation of the water flow does not need additional power, and the treatment cost of the whole system is not increased while the full catalytic oxidation of the wastewater is ensured.
Specifically, in a preferred embodiment, the reaction column 101 is divided into three sections, namely: a first water circulation reaction part 110a, a second water circulation reaction part 110b, and a complete catalytic reaction part 130. The three sections are connected by flanges. The height to diameter ratio of the reaction column 101 is generally 6 to 10.
Further, a water distributor 140 is disposed at the bottom of the reaction tower 101, and a water outlet of the water distributor 140 is communicated with the lower end of the first catalyst container 112. The gas-liquid mixture of the wastewater and the ozone is distributed into the first catalyst container 112 through the water distributor to ensure that the wastewater can be uniformly and sufficiently catalytically oxidized by the ozone.
Further, the wastewater treatment device also comprises an ozone generator 102, a gas-liquid mixing pump 103 and a wastewater inlet pipe 104, wherein the ozone generator 102 and the wastewater inlet pipe 104 are communicated with the gas-liquid mixing pump 103, and the gas-liquid mixing pump 103 is communicated with the water distributor 140. The air is converted into ozonized air under the action of the ozone generator 102, the ozonized air and the wastewater are uniformly dispersed in the wastewater in the form of micro-bubbles of 20-60 mu m to form a gas-liquid mixture under the action of the gas-liquid mixing pump 103, and the gas-liquid mixture is introduced into the water distributor 140.
Further, a water outlet 131 is provided at a top side wall of the complete catalytic reaction part 130, and a water collector 150 is provided at a top of the complete catalytic reaction part 130, and the water collector 150 is communicated with the water outlet 131. The treated water that has been completely catalytically reacted by the complete catalytic reaction unit 130 is collected by the sump 150 and discharged from the water outlet 131.
Further, the wastewater treatment apparatus 100 further includes an ozone destructor 160, and the ozone destructor 160 is in communication with the top of the complete catalytic reaction part 130. The ozone introduced from the bottom of the device may not be completely reacted, and the ozone destructor 160 is provided to convert the residual ozone into oxygen to be discharged into the air, so as to prevent the ozone from discharging polluted air and causing personal injury to operators.
Further, a defoamer 132 is further provided on the top of the complete catalytic reaction part 130. When the catalytic oxidation reaction is performed, bubbles may be generated above the catalyst packing layer in the complete catalytic reaction unit 130, and when bubbles are generated, the defoamer 132 performs a defoaming function.
Further, a pressure balance valve 133 is provided at the top of the complete catalytic reaction part 130. In the wastewater treatment process, the internal pressure of the reaction tower 101 can change all the time, and in order to ensure the normal and efficient operation of the device, a pressure balance valve 133 is arranged to adjust the internal pressure of the reaction tower 101.
Further, the upper portion of the sidewall of each water circulation reaction part and the upper portion of the sidewall of the complete catalytic reaction part 130 are provided with sampling ports 170, so that an operator can obtain water samples of water treated by each treatment unit, the water quality conditions of the water samples can be detected, and the operation of the device can be conveniently regulated.
After the wastewater treatment apparatus 100 is operated for a plurality of cycles, it is necessary to clean the inside of the apparatus. Further, a drain outlet 180 is formed in the bottom of the reaction tower 101, and sewage in the cleaning device can be discharged from the drain outlet 180.
The embodiment of the invention provides a wastewater treatment method, which comprises the step of treating wastewater by using the wastewater treatment device 100 provided by the invention.
The method specifically comprises the following steps:
in each water circulation reaction part and the complete catalytic reaction part 130, an ozone catalyst is filled to form a catalyst packing layer 105.
Introducing a gas-liquid mixture of ozone and wastewater to the bottom of the first water circulation reaction part 110 a;
a part of the wastewater passing through the catalyst packing layer 105 of the first water circulation reaction part 110a flows back to the lower end of the first catalyst container 112 from the first water circulation gap 114 through the first water circulation channel 115, enters the catalyst packing layer 105 again for catalytic oxidation, and the other part enters the second water circulation reaction part 110b through the small end of the baffling connecting pipe 113; the wastewater entering the second water circulation reaction part 110b passes through the catalyst packing layer 105 in the second water circulation reaction part 110b, a part of the wastewater flows back to the lower end of the second catalyst container 122 from the second water circulation gap 124 through the second water circulation channel 125 and enters the catalyst packing layer 105 again for catalytic oxidation, the other part of the wastewater enters the complete catalytic reaction part 130 through the water flow conveying channel 126, and the wastewater is discharged from the upper part after being completely catalytically oxidized through the catalyst packing layer 105 in the complete catalytic reaction part 130.
Preferably, the particle size of the catalyst filled in the first water circulation reaction part 110a is larger than that of the catalyst filled in the second water circulation reaction part 110 b. When the particle size of the catalyst is larger, the specific surface area is relatively smaller, macromolecular organic matters can be more effectively adsorbed, ozone molecules are converted into hydroxyl free radicals on the surface of the catalyst, and the hydroxyl free radicals with strong oxidizability convert the macromolecular organic matters into micromolecular organic matters; when the particle size of the catalyst is small, the specific surface area is large, organic matters with small molecules can be effectively adsorbed, and the ozone molecules further convert the small-molecule organic matters under the action of the catalystIs CO2And water.
Preferably, in order to ensure better catalytic oxidation effect, the particle size of the catalyst filled in the first water flow circulation reaction part is 5-8mm, and the particle size of the catalyst filled in the second water flow circulation reaction part is 3-5 mm.
Further preferably, the particle size of the catalyst filled in the complete catalytic reaction unit 130 is on the same order as the particle size of the catalyst filled in the second water-circulation reaction unit.
The embodiment of the invention also provides application of the wastewater treatment device 100 and the wastewater treatment method in pretreatment of refractory wastewater or advanced treatment of biochemical wastewater.
Preferably, when the difficultly degraded wastewater is pretreated, the treatment effect is obvious when BOD/COD of the difficultly degraded wastewater is less than 0.1.
Preferably, when the biochemical wastewater is treated, the treatment effect is remarkable when the COD of the biochemical wastewater is less than 200 mg/L.
The features and properties of the present invention are described in further detail below in connection with the examples of application.
Application example 1: the biochemical effluent of the ethylene glycol wastewater is subjected to advanced treatment pilot plant, the treatment capacity is 200L/h, and raw water CODcr120 to 180mg/L (B/C)<0.1). After the catalytic ozonation treatment by the method provided by the invention, the effluent CODcrLess than 40mg/L and energy consumption of about 1.4 kW.h/m3。
Application example 2: the biochemical effluent advanced treatment pilot plant of the Purified Terephthalic Acid (PTA) wastewater has the treatment capacity of 200L/h and the COD of raw watercr120 to 200mg/L (B/C)<0.1). After the catalytic ozonation treatment by the method provided by the invention, the effluent CODcrLess than 50mg/L and energy consumption of about 1.5 kW.h/m3。
Application example 3: the biochemical effluent of the oil refining wastewater is subjected to advanced treatment pilot plant with the treatment capacity of 200L/h and raw water COD cr100 to 200mg/L (B/C)<0.1). After the catalytic ozonation treatment by the method provided by the invention, the effluent CODcrLess than 50mg/L and energy consumption of about 1.2 kW.h/m3。
In summary, the wastewater treatment apparatus provided by the present invention forms part of wastewater into an internal circulation fluidized state under the action of the outer wall of the first catalyst container and the baffle connecting pipe in the first water circulation reaction part, forms part of wastewater into an internal circulation fluidized state under the action of the outer wall of the second catalyst container and the baffle in the second water circulation reaction part, and enables ozone molecules to fully participate in the reaction under the condition of the segmented multi-stage treatment, thereby improving the ozone utilization rate, improving the oxidation reaction efficiency, and ensuring that the wastewater is completely oxidized by catalysis. The structure of the device provided by the invention ensures that the internal circulation of the water flow does not need additional power, and the treatment cost of the whole system is not increased while the full catalytic oxidation of the wastewater is ensured.
The wastewater treatment method provided by the invention adopts the device provided by the invention to treat wastewater, and the method enables ozone molecules to fully participate in the reaction, thereby improving the ozone utilization rate, improving the oxidation reaction efficiency, ensuring that the wastewater is completely catalytically oxidized, and not increasing the treatment cost of the whole system while the wastewater is fully catalytically oxidized.
The wastewater treatment device and the method provided by the invention are very suitable for pretreatment of refractory wastewater or advanced treatment of biochemical wastewater.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A wastewater treatment device is characterized by comprising a reaction tower, wherein the reaction tower comprises a multistage catalytic reaction part and a complete catalytic reaction part which are communicated with each other from bottom to top, the multistage catalytic reaction part comprises at least two water flow circulation reaction parts which are communicated in sequence, and the multistage catalytic reaction part comprises a first water flow circulation reaction part positioned at the lowermost end of the reaction tower and a second water flow circulation reaction part communicated with the complete catalytic reaction part;
the first water flow circulation reaction part comprises a first shell, a first catalyst container and a horn-shaped baffling connecting pipe, the baffling connecting pipe is provided with a large head end and a small head end, and the second water flow circulation reaction part comprises a second shell, a second catalyst container and a conical baffling baffle;
the first catalyst container is positioned in the first shell, a first water flow circulation channel is defined by the outer wall of the first catalyst container and the inner wall of the first shell, a large end of the baffling connecting pipe is capped above the first catalyst container, a first water flow circulation gap is formed between the large end of the baffling connecting pipe and the upper edge of the first catalyst container, the first water flow circulation gap is communicated with the first water flow circulation channel, the first water flow circulation channel is communicated with the bottom of the first catalyst container, and a small end of the baffling connecting pipe is communicated with the bottom of the second catalyst container;
the second catalyst container is located in the second casing, the outer wall of second catalyst container with the inner wall of second casing encloses into second rivers circulation channel, baffling baffle lid in second catalyst container top, with form second rivers circulation clearance between the upper edge of second catalyst container, second rivers circulation clearance with second rivers circulation channel intercommunication, second rivers circulation channel with the bottom intercommunication of second catalyst container, baffling baffle's outer wall with enclose into rivers transfer passage between the second casing, rivers transfer passage with complete catalytic reaction portion intercommunication, rivers transfer passage still with second rivers circulation channel intercommunication.
2. The wastewater treatment device according to claim 1, wherein a water distributor is arranged at the bottom of the reaction tower, and a water outlet of the water distributor is communicated with the lower end of the first catalyst container;
preferably, the wastewater treatment device further comprises an ozone generator, a gas-liquid mixing pump and a wastewater inlet pipe, wherein the ozone generator and the wastewater inlet pipe are communicated with the gas-liquid mixing pump, and the gas-liquid mixing pump is communicated with the water distributor.
3. The wastewater treatment apparatus according to claim 1, wherein a water outlet is provided on a top side wall of the complete catalytic reaction section, and a water collector is provided on a top of the complete catalytic reaction section, the water collector communicating with the water outlet.
4. The wastewater treatment apparatus according to claim 1, further comprising an ozone destructor in communication with a top of the complete catalytic reaction section.
5. The wastewater treatment apparatus according to any of claims 1 to 4, wherein a defoamer is further disposed on the top of the complete catalytic reaction section;
preferably, the top of the complete catalytic reaction part is also provided with a pressure balance valve.
6. The wastewater treatment apparatus according to any one of claims 1 to 4, wherein a sampling port is provided in an upper portion of a side wall of each of the water circulation reaction section and the complete catalytic reaction section.
7. A method for treating wastewater, comprising treating wastewater with the wastewater treatment apparatus according to any one of claims 1 to 6.
8. The wastewater treatment method according to claim 7, characterized by comprising:
filling an ozone catalyst in each water flow circulation reaction part and the complete catalytic reaction part to form a catalyst filling layer;
introducing a gas-liquid mixture of ozone and wastewater to the bottom of the first water flow circulation reaction part;
discharging treated water from an upper portion of the complete catalytic reaction section;
preferably, the ozone in the gas-liquid mixture is present in a bubble particle size of 20-60 μm.
9. The wastewater treatment method according to claim 7, wherein the particle size of the catalyst filled in the first water circulation reaction part is larger than the particle size of the catalyst filled in the second water circulation reaction part;
preferably, the particle size of the catalyst filled in the first water flow circulation reaction part is 5-8mm, and the particle size of the catalyst filled in the second water flow circulation reaction part is 3-5 mm.
10. Use of the wastewater treatment apparatus according to claims 1 to 6 and the wastewater treatment method according to any one of claims 7 to 9 for pretreatment of refractory wastewater or advanced treatment of wastewater after biochemical treatment;
preferably, BOD/COD of the refractory wastewater is less than 0.1;
preferably, the COD of the biochemical wastewater is less than 200 mg/L.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816541A (en) * | 2021-10-26 | 2021-12-21 | 中国石油化工股份有限公司 | Sewage treatment method and device |
| CN115504562A (en) * | 2022-10-20 | 2022-12-23 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Catalytic ozonation reactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0436409A1 (en) * | 1989-12-07 | 1991-07-10 | Anjou Recherche (Groupement D'interet Economique Dit:) | Method for ozonizing water by means of heterogeneous catalyst activation |
| CN102001767A (en) * | 2010-10-26 | 2011-04-06 | 中国矿业大学(北京) | Advanced treatment system of coking wastewater |
| CN204298130U (en) * | 2014-11-13 | 2015-04-29 | 中国石油大学(北京) | Utilize the device of oil refining waste catalyst and ozone treatment oil refining saline sewage |
| CN208916893U (en) * | 2018-06-22 | 2019-05-31 | 哈尔滨工业大学（深圳） | A kind of catalytic ozonation stirring reactor |
-
2020
- 2020-06-08 CN CN202010514826.5A patent/CN111620434A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0436409A1 (en) * | 1989-12-07 | 1991-07-10 | Anjou Recherche (Groupement D'interet Economique Dit:) | Method for ozonizing water by means of heterogeneous catalyst activation |
| CN102001767A (en) * | 2010-10-26 | 2011-04-06 | 中国矿业大学(北京) | Advanced treatment system of coking wastewater |
| CN204298130U (en) * | 2014-11-13 | 2015-04-29 | 中国石油大学(北京) | Utilize the device of oil refining waste catalyst and ozone treatment oil refining saline sewage |
| CN208916893U (en) * | 2018-06-22 | 2019-05-31 | 哈尔滨工业大学（深圳） | A kind of catalytic ozonation stirring reactor |
Non-Patent Citations (1)
| Title |
|---|
| 朱静平等: "《污水处理工程实践》", 31 January 2010, 西南交通大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113816541A (en) * | 2021-10-26 | 2021-12-21 | 中国石油化工股份有限公司 | Sewage treatment method and device |
| CN113816541B (en) * | 2021-10-26 | 2022-07-19 | 中国石油化工股份有限公司 | Sewage treatment method and device |
| CN115504562A (en) * | 2022-10-20 | 2022-12-23 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Catalytic ozonation reactor |
| WO2024082835A1 (en) * | 2022-10-20 | 2024-04-25 | 哈尔滨工业大学 | Catalytic ozonation reactor |
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