CN213357049U - Sewage ozone catalytic oxidation processing system - Google Patents
Sewage ozone catalytic oxidation processing system Download PDFInfo
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- CN213357049U CN213357049U CN202021826169.XU CN202021826169U CN213357049U CN 213357049 U CN213357049 U CN 213357049U CN 202021826169 U CN202021826169 U CN 202021826169U CN 213357049 U CN213357049 U CN 213357049U
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Abstract
The utility model provides a sewage ozone catalytic oxidation processing system, including unit, ozone catalytic oxidation unit, play water unit, tail gas processing unit of intaking, be equipped with water collection area, ozone catalytic oxidation region, water distribution gas distribution region from top to bottom in proper order in the ozone catalytic oxidation unit. The utility model provides a pair of sewage ozone catalytic oxidation processing system through forming liquid stream cocurrent route, liquid stream countercurrent path, air current route, back flush route, realizes the intensive mixing contact of ozone and sewage, improves ozone catalytic oxidation efficiency, again can make full use of ozone, and no secondary pollution produces, and it is applicable to the sewage ozone catalytic oxidation treatment of various scales, has characteristics such as nimble being suitable for, can be used to the ozone catalytic oxidation preliminary treatment or the degree of depth processing of various sewage.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, a sewage ozone catalytic oxidation processing system is related to.
Background
With the increasing strictness of the national environmental protection policy, the sewage discharge standard is increasingly strict. The upgrading and transformation of sewage plants and the near-zero and zero discharge of industrial wastewater become the development trend of the sewage treatment industry. The removal of the refractory organic matters is a main problem in the upgrading and transformation of sewage plants, near-zero and zero discharge of industrial wastewater and the like.
At present, methods for removing refractory organic matters mainly comprise an adsorption method and an advanced oxidation method. The adsorption method is to utilize solid particles with large surface area to adsorb colloid substances and solute in sewage, when water flows through the adsorption method, pollutants in wastewater can be adsorbed onto the particles, and the solid particles are used as adsorption media to adsorb the pollutants so as to realize water purification. However, the adsorption method has the problems of high treatment cost, limited capability of removing part of refractory organic matters and the like, and is usually arranged at the tail end of a sewage treatment system to be used as a guarantee process to ensure that the sewage reaches the standard and is discharged. The advanced oxidation method is a method for removing refractory organic matters in sewage by utilizing the strong oxidation action of hydroxyl radicals, the hydroxyl radicals have no selectivity and can almost oxidize all organic pollutants, and a Fenton oxidation method, an ozone catalytic oxidation method, a photocatalytic oxidation method and the like are commonly used.
The Fenton oxidation method is to oxidize Fe by hydrogen peroxide2+Generate hydroxyl free radical under the catalysis of the catalyst, and further oxidize most organic matters. The Fenton oxidation method usually carries out the reaction under the acidic condition, and sulfuric acid and sulfur are addedFerrous acid, sodium hydroxide and other substances are common methods for removing refractory organic matters. The Fenton oxidation method introduces sulfate radicals, sodium ions and other ions while removing most organic matters, which is unfavorable for desalting sewage, and also generates a large amount of iron mud, thereby increasing the treatment cost of the sludge. The photocatalytic oxidation method is characterized in that under the excitation of light, electron-hole pairs are generated on the surface of a catalyst, and then the electron-hole pairs react with oxygen in air or water and water to generate hydroxyl radicals, so that organic pollutants in wastewater can be degraded into small molecular substances. Photocatalytic oxidation process often uses O2、O3、H2O2Titanium dioxide is used as an auxiliary oxidant and a catalyst. But the photocatalytic oxidation method has few cases of being applied to sewage treatment in a modeling way. The catalytic ozonation method is a method for generating hydroxyl radicals by utilizing ozone under the action of a catalyst, and has the advantages of good organic pollutant removal effect, no introduction of ions, capability of eliminating ozone from ozone tail gas through a tail gas destruction device so as to avoid secondary pollution and the like.
The Chinese invention patent (CN201910331170.0) introduces an ozone catalytic oxidation sewage treatment device. The device realizes intaking and the mixing of ozone through installing the ejector additional on the inlet tube, intercepts, deposits the suspended solid that ozone catalytic oxidation in-process produced through setting up sedimentation tank and suspended solid baffle, establishes ties in order to increase the ozone utilization ratio through setting up two-stage ozone reaction tank. The device realizes the full mixing of the inlet water and the ozone through the jet device, but the ozone adding amount is limited by the type of the jet device, the ozone adding amount cannot be flexibly adjusted, and the applicability of the device is limited; the suspended matter baffle and the sedimentation tank intercept the suspended matters of the effluent and also intercept the suspended matters washed out in the backwashing process, which is not beneficial to the effluent quality; the device does not have the water distribution device to go out water, the short-term flow easily appears.
Currently designed ozone catalytic oxidation devices are mostly tower-shaped and are difficult to be applied to the treatment of sewage with larger scale.
SUMMERY OF THE UTILITY MODEL
In view of the above disadvantages of the prior art, the present invention provides a catalytic ozonation treatment system for wastewater, which can fully utilize ozone and wastewater while fully mixing ozone and wastewater, and has no secondary pollution; the method is suitable for catalytic ozonation treatment of sewage of various scales, has the characteristics of flexibility, applicability and the like, and can be used for catalytic ozonation pretreatment or advanced treatment of various sewage.
In order to achieve the above and other related objects, the present invention provides a sewage ozone catalytic oxidation treatment system, which comprises a water inlet unit, an ozone catalytic oxidation unit, a water outlet unit, and a tail gas treatment unit, wherein the ozone catalytic oxidation unit is internally provided with a water collecting region, an ozone catalytic oxidation region, and a water and gas distributing region from top to bottom;
the water inlet unit and/or the water outlet unit are communicated with the water distribution and air distribution area along the water inlet direction, and the water collection area is communicated with the water outlet unit along the water outlet direction to form a liquid flow downstream passage;
the water inlet unit is communicated with the water collecting area along the water inlet direction, and the water distribution and air distribution area is communicated with the water outlet unit along the water outlet direction to form a liquid flow countercurrent passage;
the water outlet unit and/or the water collecting area are/is communicated with the tail gas treatment unit along the gas outlet direction to form a gas flow passage;
the water outlet unit is communicated with the water distribution and gas distribution area along the backwashing water inlet direction to form a backwashing passage.
Preferably, the water inlet unit is a water inlet tank.
Preferably, be linked together through the inlet tube between water inlet unit and the ozone catalytic oxidation unit, the inlet tube is equipped with first water inlet branch pipe, intake pump, second water inlet branch pipe along the direction of intaking in proper order, be equipped with first water intaking valve on the first water inlet branch pipe, be equipped with the second water intaking valve on the second water inlet branch pipe.
More preferably, in the liquid flow concurrent flow passage, a water ejector is arranged on the second water inlet branch pipe, and the water ejector is externally connected with an ozone inlet pipe.
Further preferably, the water ejector is arranged on a second water inlet branch pipe between the water inlet pump and the second water inlet valve.
Preferably, the ozone catalytic oxidation unit is a closed tank body.
Preferably, a water distribution and air distribution pipe is arranged in the water distribution and air distribution area, and the water distribution and air distribution pipe is selected from one of a single water distribution and air distribution pipe or a composite air distribution pipe; in the liquid flow downstream passage, the water distribution and air distribution pipe is a single water distribution and air distribution pipe; in the liquid flow countercurrent passage, the water distribution and air distribution pipe is a composite air distribution pipe.
More preferably, the bottom of the single water and air distributing pipe is provided with a plurality of perforations.
More preferably, one end of the single water distribution and air distribution pipe is communicated with the second water inlet branch pipe, the other end of the single water distribution and air distribution pipe is externally connected with a backwashing air inlet pipe, and the backwashing air inlet pipe is provided with a backwashing air inlet valve and is connected with an air blower.
More preferably, the composite gas distribution pipe comprises a first gas distribution branch pipe and a second gas distribution branch pipe, the first gas distribution branch pipe is externally connected with an ozone inlet pipe, and the ozone inlet pipe is provided with an ozone inlet valve; and the second gas distribution branch pipe is externally connected with a backwashing gas inlet pipe, and the backwashing gas inlet pipe is provided with a backwashing gas inlet valve and is connected with an air blower.
Further preferably, a plurality of ozone gas distribution discs are arranged on the first gas distribution branch pipe, and a plurality of through holes are formed in the bottom of the second gas distribution branch pipe.
Preferably, be equipped with catalyst packing layer, cloth water cloth gas layer, backup pad from top to bottom in the ozone catalytic oxidation region in proper order, be equipped with a plurality of water caps in the backup pad.
More preferably, the height ratio of the catalyst packing layer, the water and gas distribution layer and the support plate is 20-40: 2-4: 1 to 2.
Preferably, a water collecting channel is arranged in the water collecting area.
More preferably, the water collecting channel is communicated with the backwashing wastewater collecting channel, a backwashing wastewater gate is arranged between the water collecting channel and the backwashing wastewater collecting channel, and the backwashing wastewater collecting channel is externally connected with a backwashing wastewater pipe.
More preferably, the water collecting channel communicates with a second water inlet branch pipe in the liquid flow reverse flow path.
Preferably, the water outlet unit is a closed water outlet contact tank.
Preferably, a plurality of galleries are arranged in the water outlet unit.
More preferably, a spacing is maintained between adjacent galleries.
More preferably, in the liquid flow forward flow path, the water outlet unit is communicated with the first water inlet branch pipe through a circulation pipe, the circulation pipe includes a main circulation pipe and a plurality of branch circulation pipes, one end of each branch circulation pipe is communicated with the water outlet unit, the other end of each branch circulation pipe is communicated with the main circulation pipe, the main circulation pipe is further communicated with the first water inlet branch pipe, and the branch circulation pipes are provided with circulation valves.
Preferably, the water outlet unit is communicated with the ozone catalytic oxidation unit through a water outlet pipe, and a water outlet valve is arranged on the water outlet pipe.
More preferably, in the liquid flow downstream passage, the water outlet unit is communicated with a water collecting channel through a water outlet pipe; in the liquid flow countercurrent passage, the water outlet unit is communicated with the water distribution and gas distribution area through a water outlet pipe.
Preferably, the water outlet unit is communicated with the water and gas distribution area through a backwashing water pipe, the backwashing water pipe is sequentially provided with a first backwashing water branch pipe, a backwashing water pump and a second backwashing water branch pipe along a backwashing water inlet direction, the first backwashing water branch pipe is provided with a first backwashing water valve, and the second backwashing water branch pipe is provided with a second backwashing water valve.
Preferably, the tail gas treatment unit is a tail gas destructor.
Preferably, the tail gas treatment unit is communicated with the water outlet unit through a first tail gas collecting pipe, a second tail gas collecting pipe is externally connected to the first tail gas collecting pipe, one end of the second tail gas collecting pipe is communicated with the water collecting area, and the other end of the second tail gas collecting pipe is communicated with the first tail gas collecting pipe.
More preferably, a first tail gas collecting valve is arranged on the first tail gas collecting pipe, and a second tail gas collecting valve is arranged on the second tail gas collecting pipe.
As mentioned above, the utility model provides a pair of sewage ozone catalytic oxidation processing system has following beneficial effect:
(1) the utility model provides a pair of sewage ozone catalytic oxidation processing system and method both can adopt the operation of gas-liquid countercurrent contact mode, can adopt the operation of gas-liquid following current contact mode again, and the operation mode is nimble various.
(2) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method directly lets in ozone through among water dart or the liquid stream adverse current passageway in the liquid stream cocurrent passageway, realizes ozone and the intensive mixing of intaking, when improving ozone catalytic oxidation effect, increases ozone utilization efficiency.
(3) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method sets up water and gas distribution layer in ozone catalytic oxidation unit for the catalyst that drops is held back to equal gas distribution, water, improves reaction efficiency and extension catalyst life.
(4) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method through forming liquid stream following current route, when realizing ozone and water intensive mixing, through controlling inflow and circulating water volume, can realize sewage treatment of various scales and throwing of various dosage ozone, have wide adaptability.
(5) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method, through forming liquid stream following current route, through the circulating pipe that sets up out the water unit, realize going out the reuse that carries tail gas in the water, improve ozone utilization efficiency.
(6) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method realizes the baffling reciprocating motion of going out water through setting up out the water unit, makes the ozone tail gas that carries in going out water spill over, avoids disturbing the normal operating of follow-up system.
(7) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method, through setting up electric gate, electric valve, can realize the full automatic operation of system, operation management is convenient.
(8) The utility model provides a pair of sewage ozone catalytic oxidation processing system and method through setting up tail gas processing unit, realizes ozone tail gas's collection, ozonolysis destruction, has avoided secondary pollution.
Drawings
FIG. 1 is a schematic view showing the operation of the liquid flow forward flow path, the air flow path and the back flush path of the catalytic ozonation treatment system for sewage according to the present invention.
FIG. 2 is a schematic view showing the operation of the liquid flow countercurrent passage, the air flow passage and the back flush passage of the catalytic ozonation treatment system of the present invention.
FIG. 3 is a schematic diagram of a first gas distribution branch pipe in a liquid flow countercurrent passage of a sewage ozone catalytic oxidation treatment system according to the present invention.
Reference numerals
1 Water intake Unit
2 ozone catalytic oxidation unit
21 water collection area
211 collecting canal
22 ozone catalytic oxidation zone
221 catalyst packing layer
222 water and gas distribution layer
223 support plate
224 water cap
23 water distribution and air distribution area
231 single water-distributing and air-distributing pipe
232 first gas distribution branch pipe
233 second gas distribution branch pipe
234 ozone gas distribution plate
3 water outlet unit
31 corridor
4 tail gas treatment unit
5 water inlet pipe
51 first water inlet branch pipe
52 water inlet pump
53 second water inlet branch pipe
54 first water inlet valve
55 second water inlet valve
6 water ejector
7 ozone inlet pipe
71 ozone inlet valve
81 backwash air inlet pipe
82 backwashing air inlet valve
83 blower
9 backwashing wastewater collection channel
91 backwashing wastewater gate
92 backwashing wastewater pipe
101 circulating main pipe
102 circulation branch pipe
103 circulating valve
111 outlet pipe
112 water outlet valve
121 first backwash water branch pipe
122 backwash water pump
123 second backwash water branch pipe
124 first backwash water valve
125 second backwash water valve
131 first exhaust collecting pipe
132 second exhaust gas collecting pipe
133 first tail gas collecting valve
134 second exhaust gas collecting valve
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 3. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The utility model provides a sewage ozone catalytic oxidation treatment system, as shown in figure 1-2, comprising a water inlet unit 1, an ozone catalytic oxidation unit 2, a water outlet unit 3 and a tail gas treatment unit 4, wherein the ozone catalytic oxidation unit 2 is internally provided with a water collecting area 21, an ozone catalytic oxidation area 22 and a water and gas distributing area 23 from top to bottom in sequence;
the water inlet unit 1 and/or the water outlet unit 3 are communicated with the water distribution and air distribution area 23 along the water inlet direction, and the water collection area 21 is communicated with the water outlet unit 3 along the water outlet direction to form a liquid flow downstream passage;
the water inlet unit 1 is communicated with the water collecting area 21 along the water inlet direction, and the water distribution and air distribution area 23 is communicated with the water outlet unit 3 along the water outlet direction to form a liquid flow countercurrent passage;
the water outlet unit 3 and/or the water collecting area 21 are/is communicated with the tail gas treatment unit 4 along the air outlet direction to form an air flow passage;
the water outlet unit 3 is communicated with the water and gas distribution area 23 along the backwashing water inlet direction to form a backwashing passage.
In the catalytic ozonation treatment system for sewage provided by the invention, the water inlet unit 1 is a water inlet tank.
In the catalytic ozonation treatment system for sewage provided by the invention, as shown in fig. 1-2, the water inlet unit 1 is communicated with the catalytic ozonation unit 2 through a water inlet pipe 5, the water inlet pipe 5 is sequentially provided with a first water inlet branch pipe 51, a water inlet pump 52 and a second water inlet branch pipe 53 along the water inlet direction, the first water inlet branch pipe 51 is provided with a first water inlet valve 54, and the second water inlet branch pipe 53 is provided with a second water inlet valve 55. The first and second water inlet valves 54 and 55 are used to control the amount of water inlet.
In a preferred embodiment, as shown in fig. 1, in the liquid flow downstream path, the second water inlet branch pipe 53 is provided with a water ejector 6, and the water ejector 6 is externally connected with an ozone inlet pipe 7. The water injector 6 is combined with the water inlet pump 52, so that the ozone input through the ozone inlet pipe 7 and the sewage input through the water inlet unit 1 can realize gas-liquid mixing.
In the liquid flow concurrent flow path, the inlet water flows from the water inlet unit 1 into the ozone catalytic oxidation unit 2 in a pressure flow.
Specifically, as shown in fig. 1, the water ejector 6 is provided on the second water inlet branch pipe 53 between the water inlet pump 52 and the second water inlet valve 55.
In the sewage catalytic ozonation treatment system provided by the invention, the ozone catalytic ozonation unit 2 is a closed tank body.
In the ozone catalytic oxidation treatment system for sewage provided by the invention, a water distribution and air distribution pipe is arranged in the water distribution and air distribution area 23, and is selected from one of a single water distribution and air distribution pipe 231 or a composite air distribution pipe; as shown in fig. 1, in the liquid flow downstream passage, the water distribution and air distribution pipe is a single water distribution and air distribution pipe 231; as shown in fig. 2, in the liquid flow countercurrent passage, the water and gas distribution pipe is a composite gas distribution pipe.
In a preferred embodiment, the bottom of the single water/air distribution pipe 231 is provided with a plurality of perforations. Used for water distribution and gas distribution.
In a preferred embodiment, as shown in fig. 1, one end of the single water distribution and distribution pipe 231 is communicated with the second water inlet branch pipe 53, the other end of the single water distribution and distribution pipe 231 is externally connected with a backwash air inlet pipe 81, and the backwash air inlet pipe 81 is provided with a backwash air inlet valve 82 and is connected with a blower 83.
The single water and gas distribution pipe 231 can input backwash gas into the water and gas distribution area 23 through the blower 83.
In a preferred embodiment, as shown in fig. 2, the composite gas distribution pipe comprises a first gas distribution branch pipe 232 and a second gas distribution branch pipe 233, the first gas distribution branch pipe 232 is externally connected with an ozone inlet pipe 7, and the ozone inlet pipe 7 is provided with an ozone inlet valve 71; the second gas distribution branch pipe 233 is externally connected with a backwashing gas inlet pipe 81, and the backwashing gas inlet pipe 81 is provided with a backwashing gas inlet valve 82 and is connected with an air blower 83.
Specifically, as shown in fig. 3, the first gas distribution branch pipe 232 is provided with a plurality of ozone distribution disks 234, and the bottom of the second gas distribution branch pipe 232 is provided with a plurality of through holes.
The first gas distribution branch pipe 232 enables ozone input through the ozone inlet pipe 7 to be uniformly distributed in the ozone catalytic oxidation unit 2, and the second gas distribution branch pipe 233 enables gas generated by the air blower 83 during backwashing to uniformly enter the ozone catalytic oxidation unit 2.
In the present invention, as shown in fig. 1-2, a catalyst packing layer 221, a water and gas distribution layer 222, and a support plate 223 are sequentially disposed from top to bottom in the catalytic ozonation region 22, and a plurality of water caps 224 are disposed on the support plate 223.
In a preferred embodiment, the catalyst filler layer 221 is selected from one of an alumina-based multimetallic catalyst, a ceramic-based multimetallic catalyst, or an iron-based catalyst. The catalyst filler is a conventional existing catalyst and can be purchased from the market.
The catalyst filler can enable ozone to generate hydroxyl radicals under the catalytic action of the catalyst, and organic pollutants which are difficult to degrade in sewage are removed through the strong oxidizing property of the hydroxyl radicals.
In a preferred embodiment, the water and gas distribution layer 222 is a gravel layer or a quartz sand layer. The catalyst is used for uniformly distributing gas and water and intercepting the fallen catalyst, so that the reaction efficiency is improved and the service life of the catalyst is prolonged.
In a preferred embodiment, the ratio of the heights of the catalyst packing layer 221, the water and gas distribution layer 222 and the support plate 223 is 20-40: 2-4: 1 to 2.
Specifically, the height of the catalyst filler layer 221 is 2-4 m, the height of the water and air distribution layer 222 is 0.2-0.4 m, and the height of the support plate 223 is 0.1-0.2 m.
In a preferred embodiment, the water cap 224 is made of ABS plastic. The water caps 224 can uniformly distribute water in or collect produced water, and short flow of the ozone catalytic oxidation unit is avoided.
In the present invention, as shown in fig. 1-2, a water collecting channel 211 is provided in the water collecting area 21.
In a preferred embodiment, as shown in fig. 1-2, the water collecting channel 211 is communicated with a backwashing wastewater collecting channel 9, a backwashing wastewater gate 91 is arranged between the water collecting channel 211 and the backwashing wastewater collecting channel 9, and the backwashing wastewater collecting channel 9 is externally connected with a backwashing wastewater pipe 92. Is used for collecting the backwashing wastewater generated by the ozone catalytic oxidation unit 2 and discharging the backwashing wastewater out of the backwashing wastewater pipe 92.
In a preferred embodiment, as shown in FIG. 2, the catchment channel 211 communicates with the second inlet leg 53 in the flow counterflow path.
In the flow counterflow path, the influent flows from the influent unit to the catalytic ozonation unit 2 via the collection channel 211 in a gravity flow.
In the catalytic ozonation treatment system for sewage provided by the invention, the water outlet unit 3 is a closed water outlet contact tank.
In the present invention, as shown in fig. 1-2, a plurality of galleries 31 are provided in the effluent unit 3. The corridor 31 realizes separation of water and ozone tail gas through baffling reciprocating motion of water flow, and avoids influence of water on a subsequent system.
In a preferred embodiment, as shown in fig. 1-2, a spacing is maintained between adjacent galleries 31.
In a preferred embodiment, as shown in fig. 1, in the liquid flow forward flow path, the water outlet unit 3 is communicated with the first water inlet branch pipe 51 through a circulation pipe, the circulation pipe comprises a main circulation pipe 101 and a plurality of branch circulation pipes 102, one end of the branch circulation pipe 102 is communicated with the water outlet unit 3, the other end of the branch circulation pipe 102 is communicated with the main circulation pipe 101, the main circulation pipe 101 is further communicated with the first water inlet branch pipe 51, and a circulation valve 103 is arranged on the branch circulation pipe 102. The circulating valve 103 is used for controlling the amount of circulating water.
In the catalytic ozonation treatment system for sewage provided by the invention, as shown in fig. 1-2, the water outlet unit 3 is communicated with the catalytic ozonation unit 2 through a water outlet pipe 111, and the water outlet pipe 111 is provided with a water outlet valve 112.
In a preferred embodiment, as shown in fig. 1, in the liquid flow downstream path, the water outlet unit 3 is communicated with a water collecting channel 211 through a water outlet pipe 111; as shown in fig. 2, in the liquid flow reverse flow path, the water outlet unit 3 is communicated with the water and gas distribution area 23 through the water outlet pipe 111. For collecting the water produced by the catalytic ozonation unit 2.
In the ozone catalytic oxidation treatment system for sewage, as shown in fig. 1-2, the water outlet unit 3 is communicated with the water and gas distribution region 23 through a backwash water pipe, the backwash water pipe is sequentially provided with a first backwash water branch pipe 121, a backwash water pump 122 and a second backwash water branch pipe 123 along a backwash water inlet direction, the first backwash water branch pipe 121 is provided with a first backwash water valve 124, and the second backwash water branch pipe 123 is provided with a second backwash water valve 125.
In the sewage catalytic ozonation treatment system provided by the invention, the tail gas treatment unit 4 is a tail gas destructor. The tail gas destructor is an ozone tail gas destructor sold in the market, and catalytic decomposition or thermal decomposition is adopted for ozone in the tail gas. And the tail gas treatment unit 4 decomposes and destroys ozone, so that the tail gas is discharged up to the standard.
In the present invention, as shown in fig. 1-2, the tail gas treatment unit 4 is communicated with the water outlet unit 3 through a first tail gas collection pipe 131, a second tail gas collection pipe 132 is externally connected to the first tail gas collection pipe 131, one end of the second tail gas collection pipe 132 is communicated with the water collection area 21, and the other end of the second tail gas collection pipe 132 is communicated with the first tail gas collection pipe 131.
In a preferred embodiment, as shown in fig. 1-2, a first exhaust gas collecting valve 133 is disposed on the first exhaust gas collecting pipe 131, and a second exhaust gas collecting valve 134 is disposed on the second exhaust gas collecting pipe 132.
The valves are all electrically operated valves. The gates are all electric gates.
The following describes the use of a sewage ozone catalytic oxidation treatment system according to the present invention with reference to fig. 1-3.
After obtaining the sewage ozone catalytic oxidation treatment system, a user can operate according to a liquid flow downstream passage and an air flow passage shown in fig. 1, the water inlet in the water inlet unit 1 is input into the first water inlet branch pipe 51 through the water inlet pump 52, the return water in the water outlet unit 3 flowing out through the circulating pipe is also input into the first water inlet branch pipe 51, the water inlet and the return water are mixed in the first water inlet branch pipe 51 and then input into the second water inlet branch pipe 53, the ozone input through the ozone inlet pipe 7 enters the second water inlet branch pipe 52 through the water injector 6 and then input into the water and water distribution and gas distribution area 23 through the single water and gas distribution pipe 231, and therefore the ozone, the water inlet and the return water are fully mixed.
Then, the mixture is distributed by water through a water cap 224 on a support plate 223 in the ozone catalytic oxidation area 22, and then enters a catalyst packing layer 221 through a water distribution and gas distribution layer 222 made of gravel or quartz sand, so that the ozone generates hydroxyl radicals under the catalytic action of the catalyst, and the refractory organic pollutants in the sewage are removed through strong oxidation. And then the ozone tail gas and the outlet water containing the ozone tail gas are collected in the water collecting area 21, and the outlet water containing the ozone tail gas is collected by the water collecting channel 211.
The ozone tail gas accumulated in the water collecting area 21 is input into the tail gas treatment unit 4 through the second tail gas collecting pipe 132 to decompose and destroy ozone, so that the tail gas reaches the standard and is discharged.
The outlet water containing ozone tail gas is input into the outlet unit 3 through the outlet pipe 111, and the ozone tail gas in the outlet water is discharged in the outlet unit 3 through the baffling reciprocating motion of the water flow in the gallery 31 and is separated into the ozone tail gas and the outlet water. Ozone tail gas is input into the tail gas treatment unit 4 through the first tail gas collecting pipe 131, and the ozone is decomposed and destroyed, so that the tail gas reaches the standard and is discharged. In the water outlet unit 3, the water outlet part is used as return water and then is input into the first water inlet branch pipe 51 through a circulating pipe to form circulation.
After obtaining the sewage ozone catalytic oxidation treatment system, the user also operates according to the liquid flow reverse flow path and the air flow path shown in fig. 2, and the water inlet in the water inlet unit 1 is input into the first water inlet branch pipe 51 and then input into the second water inlet branch pipe 52 through the water inlet pump 52, and then input into the water collecting channel 211 in the water collecting area 21 of the ozone catalytic oxidation unit 2.
The feed water flows from the water collection channel 211 to the catalytic ozonation zone 22 from top to bottom. Ozone is input into the water and gas distribution area 23 through the ozone inlet pipe 7 and the first gas distribution branch pipe 232 in the composite gas distribution pipe in sequence and flows into the ozone catalytic oxidation area 22 from bottom to top. The inlet water and the ozone are mixed and reacted in the ozone catalytic oxidation area 22, namely the ozone sequentially passes through the water cap 224 on the support plate 223 in the ozone catalytic oxidation area 22, then passes through the water distribution and gas distribution layer 222 made of gravel or quartz sand, and enters the catalyst packing layer 221, so that the ozone generates hydroxyl radicals under the catalytic action of the catalyst, organic pollutants which are difficult to degrade in the inlet water are removed through strong oxidation, and ozone tail gas and outlet water containing the ozone tail gas are formed.
Ozone tail gas flows into the water collecting area 21 from bottom to top to be accumulated, and is input into the tail gas treatment unit 4 through the second tail gas collecting pipe 132 to decompose and destroy ozone, so that the tail gas reaches the standard and is discharged.
The outlet water containing ozone tail gas flows into the water distribution and gas distribution area 23 from top to bottom, then is input into the water outlet unit 3 through the water outlet pipe 51, and the ozone tail gas in the outlet water is discharged in the water outlet unit 3 through the baffling reciprocating motion of the water flow in the gallery 31, so that the ozone tail gas and the outlet water are separated. Ozone tail gas is input into the tail gas treatment unit 4 through the first tail gas collecting pipe 131, and the ozone is decomposed and destroyed, so that the tail gas reaches the standard and is discharged.
When the sewage ozone catalytic oxidation treatment system runs for a period of time according to a liquid flow concurrent flow passage or a liquid flow countercurrent flow passage, the backwashing operation is carried out after the catalyst packing layer 221 in the ozone catalytic oxidation unit 2 is found to be polluted and blocked. The second water inlet valve 55 on the second water inlet branch pipe 53 and the water outlet valve 112 on the water outlet pipe 111 are automatically closed, the backwashing wastewater gate 91 and the backwashing air inlet valve 82 on the backwashing air inlet pipe 81 are firstly opened, and the backwashing gas is input into the water and gas distribution area 23 through the backwashing air inlet pipe 81 by the air blower 83. After a period of time, the first backwash water valve 124 on the first backwash water branch pipe 121 and the second backwash water valve 125 on the second backwash water branch pipe 123 are opened, and the water outlet unit 3 inputs backwash water to the water and gas distribution area 23 through the first backwash water branch pipe 121 and the second backwash water branch pipe 123 under the action of the backwash water pump 122. After a period of time, the blower 83 and backwash air inlet valve 82 are closed, and finally the first backwash water valve 124, the second backwash water valve 125 and the backwash water pump 122 are closed. Waste liquid generated by gas washing, gas water washing and water washing of the ozone catalytic oxidation unit 2 is collected by the water collecting channel 211 of the water collecting area 21 and is discharged from the backwashing waste water pipe 92 through the backwashing waste water collecting channel 9, so that the problem of pollution and blockage of the catalyst packing layer is solved.
The biochemical effluent of pharmaceutical wastewater is treated by adopting a gas-liquid countercurrent passage. The COD of raw water is 120-200 mg/L, the COD is 55-100 mg/L after the treatment of the system, the removal rate of the COD is 55-60%, and the removal amount of ozone/COD is 1.1-1.5. The wastewater is treated by the system to obtain good COD removal effect and ozone utilization efficiency.
To sum up, the utility model provides a sewage ozone catalytic oxidation processing system, through forming liquid flow cocurrent flow path, liquid flow countercurrent flow path, airflow path, back flush path, realize ozone and sewage fully mixed contact, improve ozone catalytic oxidation efficiency; the ozone and the sewage can be fully mixed, the ozone can be fully utilized, and no secondary pollution is generated; the method is suitable for catalytic ozonation treatment of sewage of various scales, has the characteristics of flexibility, applicability and the like, and can be used for catalytic ozonation pretreatment or advanced treatment of various sewage. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A sewage ozone catalytic oxidation treatment system is characterized by comprising a water inlet unit (1), an ozone catalytic oxidation unit (2), a water outlet unit (3) and a tail gas treatment unit (4), wherein a water collecting area (21), an ozone catalytic oxidation area (22) and a water and gas distributing area (23) are sequentially arranged in the ozone catalytic oxidation unit (2) from top to bottom;
the water inlet unit (1) and/or the water outlet unit (3) are communicated with the water distribution and air distribution area (23) along the water inlet direction, and the water collection area (21) is communicated with the water outlet unit (3) along the water outlet direction to form a liquid flow downstream passage;
the water inlet unit (1) is communicated with the water collecting area (21) along the water inlet direction, and the water distribution and gas distribution area (23) is communicated with the water outlet unit (3) along the water outlet direction to form a liquid flow countercurrent passage;
the water outlet unit (3) and/or the water collecting area (21) are/is communicated with the tail gas treatment unit (4) along the gas outlet direction to form a gas flow passage;
the water outlet unit (3) is communicated with the water and gas distribution area (23) along the backwashing water inlet direction to form a backwashing passage.
2. The sewage ozone catalytic oxidation treatment system according to claim 1, wherein the water inlet unit (1) is communicated with the ozone catalytic oxidation unit (2) through a water inlet pipe (5), the water inlet pipe (5) is sequentially provided with a first water inlet branch pipe (51), a water inlet pump (52) and a second water inlet branch pipe (53) along a water inlet direction, the first water inlet branch pipe (51) is provided with a first water inlet valve (54), and the second water inlet branch pipe (53) is provided with a second water inlet valve (55); in the liquid flow downstream passage, a water ejector (6) is arranged on the second water inlet branch pipe (53), and an ozone inlet pipe (7) is externally connected with the water ejector (6).
3. The catalytic ozonation treatment system for sewage according to claim 1, wherein a water distribution and air distribution pipe is arranged in the water distribution and air distribution area (23), and the water distribution and air distribution pipe is selected from one of a single water distribution and air distribution pipe (231) or a composite air distribution pipe; in the liquid flow downstream passage, the water distribution and air distribution pipe is a single water distribution and air distribution pipe (231); in the liquid flow countercurrent passage, the water distribution and air distribution pipe is a composite air distribution pipe.
4. The sewage ozone catalytic oxidation treatment system according to claim 3, wherein one end of the single water distribution and air distribution pipe (231) is communicated with the second water inlet branch pipe (53), the other end of the single water distribution and air distribution pipe (231) is externally connected with a backwashing air inlet pipe (81), and the backwashing air inlet pipe (81) is provided with a backwashing air inlet valve (82) and is connected with an air blower (83).
5. The sewage ozone catalytic oxidation treatment system according to claim 3, wherein the composite gas distribution pipe comprises a first gas distribution branch pipe (232) and a second gas distribution branch pipe (233), the first gas distribution branch pipe (232) is externally connected with an ozone inlet pipe (7), and an ozone inlet valve (71) is arranged on the ozone inlet pipe (7); the second gas distribution branch pipe (233) is externally connected with a backwashing gas inlet pipe (81), and a backwashing gas inlet valve (82) is arranged on the backwashing gas inlet pipe (81) and is connected with an air blower (83); the first gas distribution branch pipe (232) is provided with a plurality of ozone gas distribution discs (234), and the bottom of the second gas distribution branch pipe (233) is provided with a plurality of through holes.
6. The sewage ozone catalytic oxidation treatment system according to claim 1, wherein a catalyst packing layer (221), a water and gas distribution layer (222) and a support plate (223) are sequentially arranged in the ozone catalytic oxidation area (22) from top to bottom, and a plurality of water caps (224) are arranged on the support plate (223).
7. The catalytic ozonation treatment system according to claim 1, wherein a water collection channel (211) is provided in the water collection region (21); the water collecting channel (211) is communicated with the backwashing wastewater collecting channel (9), a backwashing wastewater gate (91) is arranged between the water collecting channel (211) and the backwashing wastewater collecting channel (9), and the backwashing wastewater collecting channel (9) is externally connected with a backwashing wastewater pipe (92).
8. The catalytic ozonation treatment system of sewage according to claim 1, wherein a plurality of galleries (31) are provided in the effluent unit (3); in the liquid flow forward flow passage, the water outlet unit (3) is communicated with a first water inlet branch pipe (51) through a circulating pipe, the circulating pipe comprises a main circulating pipe (101) and a plurality of branch circulating pipes (102), one end of each branch circulating pipe (102) is communicated with the water outlet unit (3), the other end of each branch circulating pipe (102) is communicated with the main circulating pipe (101), the main circulating pipe (101) is also communicated with the first water inlet branch pipe (51), and a circulating valve (103) is arranged on each branch circulating pipe (102).
9. The sewage ozone catalytic oxidation treatment system according to claim 1, wherein the water outlet unit (3) is communicated with the ozone catalytic oxidation unit (2) through a water outlet pipe (111), and a water outlet valve (112) is arranged on the water outlet pipe (111); the water outlet unit (3) is communicated with the water and gas distribution area (23) through a backwashing water pipe, the backwashing water pipe is sequentially provided with a first backwashing water branch pipe (121), a backwashing water pump (122) and a second backwashing water branch pipe (123) along a backwashing water inlet direction, the first backwashing water branch pipe (121) is provided with a first backwashing water valve (124), and the second backwashing water branch pipe (123) is provided with a second backwashing water valve (125).
10. The sewage ozone catalytic oxidation treatment system according to claim 1, wherein the tail gas treatment unit (4) is communicated with the water outlet unit (3) through a first tail gas collecting pipe (131), a second tail gas collecting pipe (132) is externally connected to the first tail gas collecting pipe (131), one end of the second tail gas collecting pipe (132) is communicated with the water collecting area (21), and the other end of the second tail gas collecting pipe (132) is communicated with the first tail gas collecting pipe (131).
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| CN111943348A (en) * | 2020-08-27 | 2020-11-17 | 上海中耀环保实业有限公司 | Sewage ozone catalytic oxidation treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111943348A (en) * | 2020-08-27 | 2020-11-17 | 上海中耀环保实业有限公司 | Sewage ozone catalytic oxidation treatment system and method |
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