Treatment system for treating ammonia-containing high-concentration organic wastewater through cooperation of ozone and electrocatalytic oxidation
By adopting ozone synergistic electrocatalytic oxidation technology in the organic wastewater treatment system with high ammonia-containing concentration, combined with temperature control and gas purification units, the problems of low treatment efficiency, high energy consumption and difficult to control ammonia volatility in the existing technology are solved, and efficient and environmentally friendly wastewater treatment effect is achieved.
Patent Information
- Application Number
- CN202421935495.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-12
AI Technical Summary
When treating organic wastewater with high concentrations of ammonia, the use of ozone oxidation or electrocatalytic oxidation alone has problems such as low efficiency, high energy consumption and difficult to control ammonia volatility, resulting in secondary pollution.
The ozone synergistic electrocatalytic oxidation treatment system is adopted, combining the ozone generator and the electrocatalytic membrane group, and temperature control and gas purification units are added to the system to degrade high concentration COD through the synergistic action of ozone and electrocatalysis, while effectively controlling ammonia volatility.
It improves the reaction efficiency of wastewater treatment, reduces energy consumption, and achieves efficient treatment effects without agent addition and secondary pollution.
Smart Images
Figure CN223016589U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wastewater treatment, and particularly relates to a wastewater treatment system for treating high-concentration ammonia-containing organic wastewater by ozone synergistic electrocatalytic oxidation. Background Art
[0002] At present, high-concentration ammonia-containing organic wastewater mainly comes from industries such as chemical engineering and pharmaceuticals. Its treatment is difficult and costly, and direct discharge will cause serious pollution to the environment. Among the existing wastewater treatment technologies, ozone oxidation and electrocatalytic oxidation technologies each have their own advantages, but there are problems such as low efficiency and high energy consumption when used alone, and the volatilization of ammonia gas during the reaction cannot be effectively controlled, which is likely to cause secondary pollution. Content of the Utility Model
[0003] The utility model provides a wastewater treatment system for treating high-concentration ammonia-containing organic wastewater by ozone synergistic electrocatalytic oxidation, which uses the ozone synergistic electrocatalytic oxidation process to degrade high-concentration COD, and adds temperature control on the basis of the traditional electrocatalytic oxidation method, effectively improving the reaction efficiency while reducing energy consumption.
[0004] The specific scheme is as follows:
[0005] A wastewater treatment system for treating high-concentration ammonia-containing organic wastewater by ozone synergistic electrocatalytic oxidation includes an ozone reaction water tank, an electrocatalytic membrane group, and a heat exchanger unit; the ozone aeration disc at the lower part of the ozone reaction water tank is connected to an ozone generator, and the top is connected to an organic wastewater pipeline and an air outlet pipeline; the lower part of the ozone reaction water tank is also connected to the electrocatalytic membrane group through a circulation pump, the electrocatalytic membrane group passes through the heat exchanger unit through a pipeline, and then is recycled and connected to the ozone reaction water tank; the heat exchanger unit is connected to a cooling water pipeline; the circulation pump is also connected to a qualified water drainage pipeline, and the air outlet pipeline is connected to a gas purification unit.
[0006] The ozone reaction water tank is provided with a liquid level gauge, a pressure transmitter, and a COD monitor.
[0007] A temperature monitor A is arranged at the rear end of the pipeline connecting the electrocatalytic membrane group passing through the heat exchanger unit; a temperature monitor B is arranged at the front end of the cooling water pipeline entering the heat exchanger unit.
[0008] The gas purification unit includes a spray absorption tower connected to the air outlet pipeline. The top of the spray absorption tower is connected to an exhaust pipe, and the exhaust pipe is provided with an ammonia nitrogen on-line monitor and an ozone destroyer; the spray absorption tower is connected to an absorption liquid pipeline and is also connected to the ozone reaction water tank through a lift pump.
[0009] The utility model adopts the ozone synergistic electrocatalytic oxidation process technology, uses the strong oxidation property of ozone and electric energy to remove organic matter and ammonia nitrogen in the wastewater, converts COD into carbon dioxide and water, does not need to add any chemicals, and has no secondary pollution; a gas purification unit is configured to prevent secondary pollution of the volatilized ammonia gas during the reaction process. Brief Description of the Drawings
[0010] Figure 1 . Schematic structural diagram of the present utility model. Detailed Description of the Preferred Embodiments
[0011] As Figure 1 shown, an ozone-assisted electrocatalytic oxidation system for treating high-concentration ammonia-containing organic wastewater includes an ozone reaction water tank 1, an electrocatalytic membrane module 2, and a heat exchanger unit 3; an ozone aeration disk 4 at the lower part of the ozone reaction water tank 1 is connected to an ozone generator 5, multiple catalytic packing layers 6 are arranged at the upper part, and the top is connected to an organic wastewater pipeline 7 and an air outlet pipeline 8; the lower part of the ozone reaction water tank 1 is also connected to the electrocatalytic membrane module 2 through a circulation pump 9, and the electrocatalytic membrane module 2 passes through the heat exchanger unit 3 through a pipeline and then is recycled and connected to the ozone reaction water tank 1; the heat exchanger unit 3 is connected to a cooling water pipeline 12; the circulation pump 9 is also connected to a qualified water drainage pipeline 13, and the air outlet pipeline 8 is connected to a gas purification unit.
[0012] The ozone reaction water tank 1 is provided with a liquid level gauge 15, a pressure transmitter 16, and a COD monitor 17.
[0013] A temperature monitor A18 is arranged at the rear end of the pipeline connecting the electrocatalytic membrane module 2 passing through the heat exchanger unit 3; a temperature monitor B19 is arranged at the front end where the cooling water pipeline 12 enters the heat exchanger unit 3.
[0014] A flow meter 10 is arranged at the rear section of the circulation pump 9.
[0015] The gas purification unit includes a spray absorption tower 14 connected to the air outlet pipeline 8. The top of the spray absorption tower 14 is connected to an exhaust pipe 20, and the exhaust pipe 20 is provided with an ammonia nitrogen on-line monitor 21 and an ozone destructor 22; the spray absorption tower 14 is connected to an absorption liquid pipeline 23 and is also connected to the ozone reaction water tank 1 through a lift pump 24.
[0016] The high-ammonia-concentration organic wastewater enters the ozone reaction water tank 1 through the organic wastewater pipeline 7. The ozone generator 5 releases ozone through the ozone aeration disk 4, and a strong oxidation reaction occurs in the catalytic packing layer 6. Then, it passes through the circulation pump 9 to the electrode assembly of the electrocatalytic membrane module 2 for COD degradation, and then enters the heat exchanger unit 11 for heat exchange and cooling treatment. After that, it returns to the ozone reaction water tank 1 for a strong oxidation reaction. Through such cyclic reaction treatment, finally, after the COD monitor 17 in the ozone reaction water tank 1 monitors that the COD meets the standard, it is discharged through the circulation pump 9 from the qualified water discharge pipeline 13. During the degradation process of the high-ammonia-concentration organic wastewater, the volatilized ammonia gas mixed with excessive ozone accumulates at the top of the ozone reaction water tank 1. The pressure is monitored by the pressure transmitter 16, and the waste gas enters the spray absorption tower 14 through the exhaust gas pipeline 8. After the ammonia gas in the waste gas is absorbed by the absorption liquid in the spray absorption tower 14, the ammonia-nitrogen on-line monitor 21 monitors the discharged gas to meet the standard for discharge, and the excessive ozone in the purification process is eliminated by the ozone destructor 22. The absorption liquid in the spray absorption tower 14 is sent to the ozone reaction water tank 1 through the lift pump 24 for treatment and then discharged after meeting the standard.
[0017] The above are only some preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A system for treating high-concentration organic wastewater containing ammonia by using ozone and electrocatalytic oxidation, characterized in that: It includes an ozone reaction water tank, an electrocatalytic membrane group, and a heat exchanger unit; the ozone explosion plate at the bottom of the ozone reaction water tank is connected to the ozone generator, and the top is connected to the organic wastewater pipeline and the air outlet pipeline; the bottom of the ozone reaction water tank is also connected to the electrocatalytic membrane group through a circulation pump, and the electrocatalytic membrane group passes through the heat exchanger unit through the pipeline and is recirculated to the ozone reaction water tank; the heat exchanger unit is connected to the cooling water pipeline; the circulation pump is also connected to the standard water drainage pipeline, and the air outlet pipeline is connected to the gas purification unit.
2. The ozone-assisted electrocatalytic oxidation treatment system for ammonia-containing high-concentration organic wastewater according to claim 1 is characterized in that: The ozone reaction water tank is provided with a liquid level meter, a pressure transmitter and a COD monitor.
3. The ozone-assisted electrocatalytic oxidation treatment system for ammonia-containing high-concentration organic wastewater according to claim 1 is characterized in that: A temperature monitor A is set at the rear end of the heat exchanger unit through the pipeline connecting the electrocatalytic membrane group; a temperature monitor B is set at the front end of the cooling water pipeline entering the heat exchanger unit.
4. The ozone-assisted electrocatalytic oxidation treatment system for ammonia-containing high-concentration organic wastewater according to claim 1 is characterized in that: The gas purification unit comprises a spray absorption tower connected to the gas outlet pipeline, the top of the spray absorption tower is connected to an exhaust pipe, the exhaust pipe is provided with an ammonia nitrogen online monitor and an ozone destructor; the spray absorption tower is connected to the absorption liquid pipeline and is connected to the ozone reaction water tank through a lifting pump.