CN211170038U - Device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation - Google Patents
Device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation Download PDFInfo
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- CN211170038U CN211170038U CN201921595870.2U CN201921595870U CN211170038U CN 211170038 U CN211170038 U CN 211170038U CN 201921595870 U CN201921595870 U CN 201921595870U CN 211170038 U CN211170038 U CN 211170038U
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Abstract
The utility model discloses a device for treating chemical wastewater by hydrodynamic cavitation coupling catalytic oxidation, which comprises a sewage lifting pump, a hydrogen peroxide storage tank, a hydrogen peroxide metering pump, an oxidant ejector, a primary oxidation tower, a steam ejector and a normal pressure catalytic oxidation tower, wherein the sewage lifting pump, the oxidant ejector, the primary oxidation tower, the steam ejector and the normal pressure catalytic oxidation tower are communicated in sequence through sewage pipelines; the utility model discloses can make hydrogen peroxide solution and waste water fully mix under hydrodynamic cavitation and carry out preliminary oxidation to waste water, carry out ordinary pressure catalytic oxidation reaction after directly heating waste water through the steam jet ejector, improve the oxidant utilization ratio, reduce the concentration of difficult degradation organic matter in the waste water, improve the biodegradability of waste water, avoid the remains of oxidant, have high efficiency, safety, easy operation, conveniently realize advantages such as automatic control, have positive meaning to environmental protection.
Description
Technical Field
The utility model belongs to the technical field of high concentration difficult degradation organic waste water treatment, especially, relate to a hydrodynamic cavitation coupling catalytic oxidation device for waste water treatment.
Background
With the continuous development of industrialization in China, the pollution of toxic, harmful and refractory organic wastewater becomes serious, and the pollution becomes a very serious environmental problem, so that the research on the treatment method is very important and becomes a hot spot of the current domestic and foreign research. The advanced oxidation technology has the advantages of wide application range, high reaction rate, strong oxidation capacity, no pollution or little pollution, and has better application prospect in the field of water treatment.
In advanced oxidation technology, catalytic oxidation means are mainly adopted to realize effective removal of pollutants. In the pretreatment process of the wastewater, the difficultly biodegradable macromolecular organic matters are decomposed into easily degradable micromolecular organic matters, so that the biodegradability of the wastewater is improved, or in the advanced treatment process, the difficultly biodegradable organic matters are decomposed and mineralized into carbon dioxide and water.
The hydrodynamic cavitation technology is a novel water treatment method, can oxidize pollutants without additional reactants, is an energy-saving and efficient method, cannot cause secondary pollution to the ecological environment, and has great potential in the aspect of treating low-concentration and high-concentration pollutants.
In liquid, when the pressure is reduced to the vapor pressure or even negative pressure, gas dissolved in the fluid is released, meanwhile, the liquid is vigorously vaporized to generate a large amount of cavitation bubbles, the cavitation bubbles expand and grow along with the flow of the liquid, when the pressure around the liquid is recovered, the cavitation bubbles are instantly collapsed, the collapsing process only lasts for a few microseconds, when the cavitation bubbles collapse, 1900-5200K high temperature and high pressure exceeding 5.065 × 107Pa are generated in a very small cavitation range around the cavitation bubbles, the temperature change rate is as high as 109K/s, and strong shock waves and jet flow with the time speed as high as 400km/H are accompanied, the extreme physical and chemical micro environment is enough to thoroughly collapse any organic matters trapped in an area.
At present, the hydrodynamic cavitation technology is used for treating wastewater directly, the treatment effect is better in the advanced treatment of wastewater, but the treatment effect is generally lower in the treatment of high-concentration wastewater. CN204752450U discloses a mild catalytic oxidation device for waste water treatment, add hydrogen peroxide solution into waste water through the line mixer earlier, heat waste water through the preheater, get into the ordinary pressure catalytic oxidation tower and carry out catalytic oxidation reaction, improve catalytic oxidation effect. CN105439322A discloses a method and an apparatus for treating wastewater based on hydrodynamic cavitation, which comprises precipitating suspended particles in wastewater, adding an oxidant into the wastewater, performing cyclic treatment of hydrodynamic cavitation treatment by jet flow, hydrodynamic cavitation treatment by rotational flow and hydrodynamic cavitation treatment by perforated plates in sequence, and generating instantaneous high temperature and high pressure to directly degrade organic substances by three-stage cavitation effect of primary jet flow, secondary rotational flow and three-stage flow limiting, so as to achieve harmless degradation of organic pollutants which are difficult to degrade conventionally.
The normal pressure catalytic oxidation device is not enough in water distribution and oxidant utilization due to equipment design, so that the normal pressure catalytic oxidation effect is difficult to reach the expected effect, and in addition, the catalytic adsorption pollutants are difficult to elute completely during normal pressure catalytic oxidation backwashing, backwashing is frequent, the backwashing effect is not enough, and the overall treatment effect is lower.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a defect to existence among the prior art discloses a device of hydrodynamic cavitation coupling catalytic oxidation treatment chemical waste water, utilizes the utility model discloses the device is with hydrodynamic cavitation technique and catalytic oxidation technique joint treatment waste water, can realize that the two advantage is complementary, improves catalytic oxidation efficiency, when ordinary pressure catalytic oxidation device backwash, utilizes steam to heat and circulate backwash water, improves the backwash effect, reduces the backwash frequency.
The utility model discloses a realize like this:
the utility model discloses a device for treating chemical wastewater by hydrodynamic cavitation coupling catalytic oxidation, which comprises a water inlet tank, a primary oxidation water inlet lift pump, an oxidant ejector, a primary oxidation tower, a steam ejector and a normal pressure catalytic oxidation tower in sequence between a water inlet pipeline valve and a water outlet valve of the normal pressure catalytic oxidation tower; the oxidant ejector is also connected with a hydrogen peroxide storage tank; a first-stage oxidation tower perforated plate is arranged in the first-stage oxidation tower; the steam ejector is communicated with the steam pipeline through a steam pipeline check valve; a catalyst bed layer is arranged in the normal pressure catalytic oxidation tower, and a porous plate of the normal pressure catalytic oxidation tower is arranged at the bottom of the normal pressure catalytic oxidation tower; the normal pressure catalytic oxidation tower is connected with one end of a backwashing water outlet valve of the normal pressure catalytic oxidation tower, and the other end of the backwashing water outlet valve of the normal pressure catalytic oxidation tower is connected between a water inlet pipeline valve and a water inlet tank; and a reflux valve of the normal pressure catalytic oxidation tower is connected between the primary oxidation tower and the normal pressure catalytic oxidation tower. The utility model discloses a lift pump, hydrogen peroxide solution storage tank, hydrogen peroxide solution measuring pump, oxidant ejector, one-level oxidation tower are intake in the one-level oxidation, hydrogen peroxide solution and waste water under the effect of oxidant ejector, oxidant and waste water intensive mixing and under the hydrodynamic cavitation, oxidize organic matter in the waste water.
The one-level oxidation tower, the one-level oxidation elevator pump that intakes, the steam ejector, atmospheric pressure catalytic oxidation tower, the one-level oxidation tower goes out water and steam under the effect of steam ejector, heat waste water and water conservancy cavitation, improve the utilization ratio of steam, waste water after the heating carries out catalytic oxidation reaction in atmospheric pressure catalytic oxidation tower, use remaining hydrogen peroxide solution in the one-level oxidation tower as the oxidant, under the effect of catalyst in the atmospheric pressure catalytic oxidation tower, carry out catalytic oxidation reaction to organic matter in the waste water, waste water after the while heating has improved catalytic oxidation reaction's efficiency, organic matter concentration in the waste water has been reduced.
One-level oxidation tower, one-level oxidation lift pump that intakes, steam ejector, ordinary pressure catalytic oxidation tower through valve control, realize the backwash to ordinary pressure catalytic oxidation tower, utilize steam ejector's effect, temperature when improving the backwash, desorb the organic matter of catalyst absorption under the high temperature and enter backwash aquatic, realize the high temperature backwash to ordinary pressure catalytic oxidation tower, improve the backwash effect.
Further, a hydrogen peroxide pipeline check valve and a hydrogen peroxide metering pump are sequentially arranged between the oxidant ejector and the hydrogen peroxide storage tank.
Furthermore, a backwashing water inlet valve of the primary oxidation tower and a water inlet pump of the normal pressure catalytic oxidation tower are arranged between the primary oxidation tower and the steam jet device; the backwashing water inlet valve of the primary oxidation tower and the water inlet pump of the normal pressure catalytic oxidation tower are connected with one end of a water outlet valve of the primary oxidation tower, and the other end of the water outlet valve of the primary oxidation tower is connected with the primary oxidation tower.
Furthermore, a water inlet valve of the atmospheric catalytic oxidation tower is arranged between the steam ejector and the atmospheric catalytic oxidation tower; the steam ejector and the water inlet valve of the atmospheric catalytic oxidation tower are connected with one end of a water inlet valve (12) of the first atmospheric catalytic oxidation tower, and the other end of the water inlet valve of the atmospheric catalytic oxidation tower is connected with the atmospheric catalytic oxidation tower.
Further, the water inlet valve of the atmospheric catalytic oxidation tower and the reflux valve of the atmospheric catalytic oxidation tower are connected to the upper part of the atmospheric catalytic oxidation tower; the water inlet valve of the atmospheric catalytic oxidation tower and the backwashing water outlet valve of the atmospheric catalytic oxidation tower are connected to the lower part of the atmospheric catalytic oxidation tower.
Further, the primary oxidation tower comprises a tower body; the porous plate of the first-stage oxidation tower is positioned in the middle of the tower body and is connected with the water inlet pipe of the first-stage oxidation tower.
The utility model discloses with prior art's beneficial effect lie in:
1. the hydrodynamic cavitation technology is coupled with the normal pressure catalytic oxidation technology to cooperatively treat the wastewater, so that the phenomenon of insufficient treatment effect of a single technology on the wastewater is improved;
2. by utilizing the function of hollow bubbles of the hydrodynamic cavitation technology, on one hand, water molecules at the interface of gas and liquid in the bubbles are cracked into OH and H, and on the other hand, the efficiency of generating hydroxyl radicals (OH) by H2O2 can be obviously increased by the cavitation effect; the cavitation hydroxyl free radicals generated in the cavitation process are combined with the strong oxidizing property of H2O2, so that the oxidizing effect on refractory organic matters in the wastewater is improved;
3. the jet device is used for mixing steam and wastewater to heat the wastewater, so that the steam heating efficiency is improved, and the heat energy loss is reduced;
4. the heated wastewater is subjected to the action of a normal-pressure catalytic oxidation tower, residual oxidant after hydrodynamic cavitation is subjected to the action of a catalyst in the catalytic oxidation tower, and residual nondegradable macromolecules in the wastewater are decomposed into micromolecular organic matters, so that the concentration of nondegradable organic pollutants in the wastewater is greatly reduced, the biodegradability of the wastewater is improved, organic matters in the wastewater can be mineralized, and the residual oxidant is decomposed;
5. when the normal pressure catalytic oxidation tower is backwashed, the waste water is heated through steam heating, the temperature of the backwashed water is increased, so that the backwashing effect is improved, organic matters adsorbed by the catalyst are desorbed into the waste water, the recovery of the catalytic effect of the catalyst is realized, the backwashing frequency is reduced, and the backwashing effect is improved;
6. the device has no secondary pollution and wide application range, can be used as a pretreatment device before biochemistry and also can be used as an advanced treatment device for effluent of a biochemical system, fully exerts the advantages of treating the organic matters difficult to biodegrade, and simultaneously achieves the purposes of reducing the operation cost and improving the treatment effect.
Drawings
FIG. 1 is a schematic structural diagram of a device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation;
wherein, 1-hydrogen peroxide storage tank; 2-hydrogen peroxide solution metering pump; 3-hydrogen peroxide pipeline check valve; 4-a first-stage oxidation tower perforated plate; 5-a first-stage oxidation tower; 6-water inlet pipeline valve; 7-a water inlet tank; 8-first-stage oxidation water inlet lift pump; 9-an oxidant ejector; 10-a water outlet valve of the first-stage oxidation tower; 11-steam line check valve; 12-a first atmospheric catalytic oxidation tower inlet valve; 13-catalyst bed layer; 14-atmospheric catalytic oxidation tower; 15-backwashing a water outlet valve of the normal pressure catalytic oxidation tower; 16-reflux valve of normal pressure catalytic oxidation tower; 17-a water outlet valve of the normal pressure catalytic oxidation tower; 18-normal pressure catalytic oxidation tower perforated plate; 19-a second atmospheric catalytic oxidation tower inlet valve; 20-a steam jet device; 21-a water inlet pump of the normal pressure catalytic oxidation tower; 22-first stage oxidation tower backwash water inlet valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention can be implemented by, but is not limited to, the following embodiments.
As shown in fig. 1, the utility model discloses a hydrodynamic cavitation coupling catalytic oxidation device for waste water treatment, including one-level oxidation elevator pump 8 that intakes, hydrogen peroxide solution storage tank 1, hydrogen peroxide solution measuring pump 2, oxidant ejector 9, one-level oxidation tower 5, steam ejector 20, ordinary pressure catalytic oxidation tower 14, one-level oxidation elevator pump 8 that intakes, oxidant ejector 9, one-level oxidation tower 5, steam ejector 20, ordinary pressure catalytic oxidation tower 14 communicates through the sewage pipeline in order, hydrogen peroxide solution storage tank 1, hydrogen peroxide solution measurement 2 pump passes through hydrogen peroxide solution pipeline and the inlet of oxidant ejector 9 and communicates in the same order, steam pipeline and the 20 import intercommunication of steam ejector.
The normal pressure catalytic oxidation tower 14 comprises a tower body, a catalyst bed layer 13, a porous plate 18, a water inlet, a water outlet, a backwashing water inlet and a backwashing water outlet, wherein the water inlet and the backwashing water outlet are positioned at the lower part of the tower body, the backwashing water inlet and the outlet are positioned at the upper part of the tower body, and the catalyst bed layer 13 is arranged in the tower body.
The device comprises a primary oxidation water inlet lifting pump 8, a hydrogen peroxide storage tank 1, a hydrogen peroxide metering pump 2, an oxidant ejector 9 and a primary oxidation tower 5, wherein under the action of the oxidant ejector 9, hydrogen peroxide and wastewater are fully mixed, and under the action of hydrodynamic cavitation, organic matters in the wastewater are oxidized.
One-level oxidation tower 5, one-level oxidation intake elevator pump 21, steam ejector 20, ordinary pressure catalytic oxidation tower 14, 5 play water in one-level oxidation tower and steam are under steam ejector 20's effect, heat and water conservancy cavitation waste water, improve the utilization ratio of steam, waste water after the heating carries out catalytic oxidation reaction in ordinary pressure catalytic oxidation tower 14, use remaining hydrogen peroxide solution in one-level oxidation tower 5 as the oxidant, under the effect of catalyst 13 in ordinary pressure catalytic oxidation tower 14, organic matter carries out catalytic oxidation reaction in the waste water, waste water after the concurrent heating has improved catalytic oxidation reaction's efficiency, organic matter concentration in the waste water has been reduced.
The one-level oxidation tower 5, the one-level oxidation water inlet lift pump 21, the steam ejector 20 and the normal pressure catalytic oxidation tower 14 realize backwashing on the normal pressure catalytic oxidation tower through valve control, utilize the effect of the steam ejector 20 to improve the water temperature during backwashing, desorb the organic matter adsorbed by the catalyst into the backwashing water at high temperature, realize high-temperature backwashing on the normal pressure catalytic oxidation tower, and improve the backwashing effect. The utility model discloses a pipeline comprises pipe, valve, flowmeter.
In the specific operation process, firstly, hydrogen peroxide is injected into a hydrogen peroxide storage tank 1 and is communicated with an oxidant ejector 9 through a hydrogen peroxide pipeline and a hydrogen peroxide check valve 3 by a hydrogen peroxide metering pump 2; meanwhile, the wastewater in the water inlet tank 7 is communicated with an oxidant ejector 9 through a wastewater pipeline by a primary oxidation water inlet lifting pump 8, hydrogen peroxide is injected into the wastewater through the oxidation ejector 9, and enters a primary oxidation tower 5 through the wastewater pipeline to be connected with a primary oxidation tower perforated plate 4 in the primary oxidation tower 5, so that the hydrodynamic cavitation is realized, a large amount of hydroxyl free radicals are generated, organic matters in the wastewater are subjected to oxidative decomposition and mineralization in the primary oxidation tower 5, and the concentration and COD value of the organic matters difficult to degrade in the wastewater are reduced; the steam pipeline is communicated with the steam ejector 20 through a steam pipeline check valve 11; the effluent of the primary oxidation tower 5 is communicated with a steam ejector 20 through a primary oxidation tower effluent valve 1 on a waste water pipeline and a normal pressure catalytic oxidation water inlet pump 21, the steam is injected into the waste water through the steam ejector 20, and is connected with a normal pressure catalytic oxidation tower porous plate 18 in a normal pressure catalytic oxidation tower 14 through a waste water pipeline and a second normal pressure catalytic oxidation tower inlet valve 19, the waste water is heated under the hydrodynamic cavitation effect, and the catalytic oxidation reaction of organic matters in the waste water is realized by utilizing the residual oxidant in the waste water under the action of a catalyst 13 in the normal pressure catalytic oxidation tower 14, so that the concentration of the organic matters in the waste water is reduced; the device is used for heating wastewater to 40-80 ℃ when being used for wastewater pretreatment, and heating wastewater to 300-60 ℃ when being used as an advanced treatment device; the effluent of the atmospheric catalytic oxidation tower 14 flows back to the bottom of the primary oxidation tower 5 through a return valve 16 of the atmospheric catalytic oxidation tower, and the effluent of the atmospheric catalytic oxidation tower is discharged through an effluent valve 17; when the normal pressure catalytic oxidation tower 14 is backwashed, wastewater enters the primary oxidation tower 5 from the water inlet tank 7 through the primary oxidation water inlet lift pump 8, the oxidant ejector 9 and the primary oxidation tower porous plate 4 in the primary oxidation tower 5, the wastewater in the primary oxidation tower 5 enters the normal pressure catalytic oxidation tower 14 through the primary oxidation tower backwashing water inlet valve 22, the normal pressure catalytic oxidation tower water inlet pump 21, the steam ejector 20 and the first normal pressure catalytic oxidation tower water inlet valve 12, and the wastewater enters the water inlet tank 7 through the catalytic layer 13 and the normal pressure catalytic oxidation tower backwashing water outlet valve; hydrogen peroxide is added through an oxidant ejector 9 during backwashing, and the flow of a hydrogen peroxide metering pump 2 is 2-4% of the flow of a primary oxidation water inlet pump 8; steam is added into the wastewater through the steam jet device 20 to heat the wastewater, so that the wastewater is heated to 60-80 ℃, and the backwashing time is 1 hour.
Example 1
As a pretreatment device, the used wastewater is pesticide intermediate production wastewater, the COD concentration in the wastewater is 8000-12000 mg/L, and the concentration of volatile phenol is 2000-3000 mg/L. the method specifically comprises the following steps:
in the operation process, the pH of the wastewater is 4-6, the consumption of hydrogen peroxide is 2.3%, the temperature of the wastewater is increased to 50-60 ℃ by using steam, the residence time of a primary oxidation tower is 30min, and the residence time of a catalytic oxidation tower is 60 min.
The treatment effect is that the COD concentration of the effluent is 2500-3000 mg/L, the concentration of the volatile phenol is 50-100 mg/L, and the effluent can reach the national emission requirement after biochemical treatment.
The backwashing method has the advantages that after the device continuously operates for 30 days, the COD concentration of outlet water is increased to 4000-4500 mg/L, the concentration of volatile phenol is increased to 300-500 mg/L, the wastewater treatment operation is stopped, the backwashing system is started for backwashing, the adding amount of hydrogen peroxide is 3%, the temperature of the wastewater is increased to 65-70 ℃, the backwashing time is 1 hour, after the backwashing is finished, the wastewater treatment system of the device is started, the treatment effect is that the COD concentration of the outlet water is 2600-3000 mg/L, the concentration of the volatile phenol of the outlet water is 50-80 mg/L, the system operates stably, and the outlet water can reach the national discharge standard after biochemical treatment.
Example 2
As an advanced treatment device, the used wastewater is biochemical effluent of a sewage treatment station in a chemical industrial park, the COD concentration in the wastewater is 200-300 mg/L, and the specific operation is as follows:
in the operation process, the pH value of the wastewater is 5-6, the consumption of hydrogen peroxide is 0.3%, the temperature of the wastewater is increased to 30-35 ℃ by utilizing steam, the residence time of a primary oxidation tower is 5min, and the residence time of a catalytic oxidation tower is 15 min.
The treatment effect is that the COD concentration of the effluent is 40-60 mg/L, and the effluent meets the national discharge requirement.
The backwashing effect is that after the device continuously operates for 60 days, the COD concentration of the effluent is increased to 80-100 mg/L, the wastewater treatment operation is stopped, the backwashing system is started to perform backwashing, the adding amount of hydrogen peroxide is 1%, the temperature of the wastewater is increased to 60-70 ℃, the backwashing time is 1 hour, and after the backwashing is finished, the wastewater treatment system of the device is started, the treatment effect is that the COD concentration of the effluent is 40-60 mg/L, the system operates stably, and the effluent reaches the national discharge standard.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (6)
1. A device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation is characterized by sequentially comprising a water inlet tank (7), a primary oxidation water inlet lifting pump (8), an oxidant ejector (9), a primary oxidation tower (5), a steam ejector (20) and a normal pressure catalytic oxidation tower (14) between a water inlet pipeline valve (6) and a water outlet valve of the normal pressure catalytic oxidation tower; the oxidant ejector (9) is also connected with a hydrogen peroxide storage tank (1); a first-stage oxidation tower porous plate (4) is arranged in the first-stage oxidation tower (5); the steam ejector (20) is communicated with the steam pipeline through a steam pipeline check valve (11); a catalyst bed layer (13) is arranged in the atmospheric pressure catalytic oxidation tower (14), and an atmospheric pressure catalytic oxidation tower porous plate (18) is arranged at the bottom of the atmospheric pressure catalytic oxidation tower (14); the normal pressure catalytic oxidation tower (14) is connected with one end of a backwashing water outlet valve (15) of the normal pressure catalytic oxidation tower, and the other end of the backwashing water outlet valve (15) of the normal pressure catalytic oxidation tower is connected between the water inlet pipeline valve (6) and the water inlet tank (7); a reflux valve (16) of the atmospheric catalytic oxidation tower is also connected between the primary oxidation tower (5) and the atmospheric catalytic oxidation tower (14).
2. The device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation according to claim 1, wherein a hydrogen peroxide pipeline check valve (3) and a hydrogen peroxide metering pump (2) are sequentially arranged between the oxidant ejector (9) and the hydrogen peroxide storage tank (1).
3. The device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation as claimed in claim 1, wherein a backwash water inlet valve (22) of the primary oxidation tower and a water inlet pump (21) of the atmospheric catalytic oxidation tower are arranged between the primary oxidation tower (5) and the steam jet ejector (20); the back-washing water inlet valve (22) of the primary oxidation tower and the water inlet pump (21) of the normal-pressure catalytic oxidation tower are connected with one end of a water outlet valve (10) of the primary oxidation tower, and the other end of the water outlet valve (10) of the primary oxidation tower is connected with the primary oxidation tower (5).
4. The device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation as claimed in claim 1, wherein a second atmospheric catalytic oxidation tower inlet valve (19) is arranged between the steam jet device (20) and the atmospheric catalytic oxidation tower (14); the steam ejector (20) and the water inlet valve (19) of the second atmospheric catalytic oxidation tower are connected with one end of the water inlet valve (12) of the first atmospheric catalytic oxidation tower, and the other end of the water inlet valve (12) of the first atmospheric catalytic oxidation tower is connected with the atmospheric catalytic oxidation tower (14).
5. The device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation is characterized in that the first atmospheric catalytic oxidation tower water inlet valve (12) and the atmospheric catalytic oxidation tower return valve (16) are connected to the upper part of the atmospheric catalytic oxidation tower (14); the water inlet valve (19) of the second atmospheric catalytic oxidation tower and the backwashing water outlet valve (15) of the atmospheric catalytic oxidation tower are connected to the lower part of the atmospheric catalytic oxidation tower (14).
6. The device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation according to claim 1, wherein the primary oxidation tower (5) comprises a tower body; the porous plate (4) of the first-stage oxidation tower is positioned in the middle of the tower body, and the porous plate (4) of the first-stage oxidation tower is connected with a water inlet pipe of the first-stage oxidation tower.
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| CN201921595870.2U CN211170038U (en) | 2019-09-24 | 2019-09-24 | Device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation |
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| CN201921595870.2U CN211170038U (en) | 2019-09-24 | 2019-09-24 | Device for treating chemical wastewater by hydrodynamic cavitation coupled catalytic oxidation |
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Denomination of utility model: A device for treating chemical wastewater by hydraulic cavitation coupling catalytic oxidation Effective date of registration: 20210817 Granted publication date: 20200804 Pledgee: Wuxi rural commercial bank Limited by Share Ltd. Yixing branch Pledgor: JIANGSU LASON CHEMICAL ENVIRONMENTAL PROTECTION Co.,Ltd. Registration number: Y2021320010315 |
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Date of cancellation: 20221217 Granted publication date: 20200804 Pledgee: Wuxi rural commercial bank Limited by Share Ltd. Yixing branch Pledgor: JIANGSU LASON CHEMICAL ENVIRONMENTAL PROTECTION CO.,LTD. Registration number: Y2021320010315 |