High-concentration organic wastewater treatment system

Abstract

The utility model provides a high-concentration organic wastewater treatment system. The high-concentration organic wastewater treatment system comprises a reaction water unit, an electro-catalysis membrane group unit and a heat exchanger unit, the reaction water unit is connected with an organic wastewater pipeline, a diluted gas pipeline and a gas outlet pipeline; the lower part of the reaction water unit is also connected with a security filter through a circulating pump and then communicated with the electro-catalysis membrane group unit; the electro-catalysis membrane group passes through the heat exchanger unit through a pipeline and is circularly connected to the reaction water unit; the heat exchanger unit is connected with a cooling water pipeline; according to the utility model, the heat exchanger is utilized to control the reaction temperature of the electrocatalytic oxidation system, so that the degradation efficiency of high-concentration organic wastewater is improved. Meanwhile, the concentration of hydrogen in the reactor is diluted by the diluent gas supplementing device, and potential safety hazards caused by concentration overrun are prevented.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment, in particular to a high-concentration organic wastewater treatment system. Background Art

[0002] At present, supercritical oxidation, Fenton oxidation, plasma cracking and other methods are mostly used for this type of high-concentration organic wastewater. However, the supercritical oxidation method has high investment cost, high temperature and high pressure, high risk, serious equipment corrosion and poor operation stability. The Fenton oxidation method has low treatment efficiency, large amount of sludge and serious secondary pollution. The plasma cracking method has low treatment capacity, high energy consumption and high investment and operation costs.

[0003] The utility model adds temperature control on the basis of the traditional electrocatalytic oxidation method, effectively improving the reaction efficiency. At the same time, it is equipped with a gas dilution and treatment device. The built-in dilution gas replenishment device in the reaction box is linked with the hydrogen concentration monitoring instrument to automatically replenish gas and dilute, preventing hydrogen enrichment from exceeding the explosion limit and avoiding safety hazards. The dilution gas is sucked into the spray tower for absorption and treatment through the fan, effectively preventing secondary pollution of the gas. Utility Model Content

[0004] The utility model proposes a high-concentration organic wastewater treatment system, which uses a heat exchanger to control the reaction temperature of the electrocatalytic oxidation system to improve the degradation efficiency of high-concentration organic wastewater. At the same time, a dilution gas replenishment device is used to dilute the hydrogen concentration inside the reactor to prevent safety hazards caused by excessive concentration.

[0005] The specific plan is as follows:

[0006] A high-concentration organic wastewater treatment system comprises a reaction water unit, an electrocatalytic membrane unit and a heat exchanger unit; the reaction water unit is connected to an organic wastewater pipeline and a dilution gas pipeline, and is also connected to an outlet pipeline; the lower part of the reaction water unit is also connected to a safety filter through a circulation pump, and then connected to the electrocatalytic membrane unit; the electrocatalytic membrane unit passes through the heat exchanger unit through a pipeline, and is then circulated and connected to the reaction water unit; the heat exchanger unit is connected to a cooling water pipeline; and the circulation pump is also connected to a qualified water drainage pipeline.

[0007] The reaction water unit is provided with a liquid level meter, a pressure transmitter A, a temperature monitor A, a COD monitor, and a hydrogen concentration detector.

[0008] A flow meter is arranged at the rear section of the circulation pump.

[0009] A temperature monitor B is provided at the rear end of the heat exchanger unit through the pipeline connecting the catalytic membrane group; a temperature monitor C is provided at the front end of the cooling water pipeline entering the heat exchanger unit.

[0010] A pressure transmitter B is installed at the rear section of the safety filter.

[0011] The electrocatalytic membrane group unit is composed of multiple electrode assemblies. A transparent water inlet sight glass is provided at the water inlet of each electrode assembly, which can observe the water inlet situation of the electrode assembly and the color change of the wastewater in real time.

[0012] The gas outlet pipeline is connected to the absorption tower, and the absorption tower is connected to the fan.

[0013] Compared with the existing technology, the advantages of this utility model patent technology are:

[0014] The system adds a heat exchange unit and controls the reaction temperature to improve reaction efficiency, save energy and reduce operating costs. The reaction water unit is connected to the dilution gas pipeline and equipped with hydrogen concentration monitoring to avoid safety hazards. The system adopts an electrocatalytic oxidation process to convert COD into carbon dioxide and water using electrical energy, without adding any reagents and without secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 .Schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, a high-concentration organic wastewater treatment system includes a reaction water unit 1, an electrocatalytic membrane unit 2, and a heat exchanger unit 3; the reaction water unit 1 is connected to an organic wastewater pipeline 4 and a dilution gas pipeline 5, and is also connected to an outlet pipeline 6, the outlet pipeline 6 is connected to an absorption tower 7, and the absorption tower 7 is connected to a fan 8; the lower part of the reaction water unit 1 is also connected to a safety filter 9 through a circulation pump 8, and then connected to an electrocatalytic membrane unit 10; the electrocatalytic membrane unit 10 passes through a heat exchanger unit 14 through a pipeline, and is recirculated and connected to the reaction water unit 1; the heat exchanger unit 14 is connected to a cooling water pipeline 15; the circulation pump 8 is also connected to a qualified water drainage pipeline 16.

[0017] The reaction water unit 1 is provided with a liquid level meter 17, a pressure transmitter A18, a temperature monitor A19, a COD monitor 20, and a hydrogen concentration detector 21, which can monitor the liquid level, pressure, temperature, COD, and hydrogen concentration of the reaction water unit 1 in real time; a flow meter 22 is provided at the rear section of the circulation pump 8, which can monitor the flow of the treated wastewater in real time; a temperature monitor B23 is provided at the rear end of the pipeline connecting the catalytic membrane group unit 10 through the heat exchanger unit 14, and a temperature monitor C24 is provided at the front end of the cooling water pipeline 15 entering the heat exchanger unit 14, which can monitor the heat exchange temperature of the heat exchanger unit 14 in real time; a pressure transmitter B25 is provided at the rear section of the security filter 9, which can monitor the pressure of the wastewater before entering the electrocatalytic membrane group unit 2 in real time.

[0018] The electrocatalytic membrane group unit 2 is composed of a plurality of electrode assemblies. A transparent water inlet viewing mirror 26 is provided at the water inlet of each electrode assembly, so that the water inlet condition of the electrode assembly and the color change of the wastewater can be observed in real time.

[0019] High-concentration organic wastewater enters the reaction water unit through the organic wastewater pipeline, is filtered through the security filter through the circulation pump, and then enters the various electrode components of the electrocatalytic membrane unit for electrolysis, converting the COD in the organic wastewater into carbon dioxide and water, and then enters the heat exchanger unit, uses cooling water for heat exchange, and then circulates to the reaction water unit; when the COD monitor of the reaction water unit detects that the COD of the wastewater reaches the discharge index, it can be discharged to the drainage pipeline through the circulation pump.

[0020] In this system, the waste gas generated during the COD degradation of organic wastewater will be enriched in the upper space of the reaction water unit, diluted by air supplementation through the dilution gas pipeline, and then enter the absorption tower under the suction action of the fan for treatment and discharge after meeting the standards.

[0021] The above descriptions are only some of the preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-concentration organic wastewater treatment system, characterized in that: It includes a reaction water unit, an electrocatalytic membrane unit, and a heat exchanger unit; the reaction water unit is connected to the organic wastewater pipeline and the dilution gas pipeline, and is also connected to the gas outlet pipeline; the lower part of the reaction water unit is also connected to the safety filter through a circulation pump, and then connected to the electrocatalytic membrane unit; the electrocatalytic membrane unit passes through the heat exchanger unit through a pipeline, and is then circulated and connected to the reaction water unit; the heat exchanger unit is connected to the cooling water pipeline; the circulation pump is also connected to the standard water drainage pipeline.

2. The high-concentration organic wastewater treatment system according to claim 1, characterized in that: The reaction water unit is provided with a liquid level meter, a pressure transmitter A, a temperature monitor A, a COD monitor, and a hydrogen concentration detector.

3. The high-concentration organic wastewater treatment system according to claim 1, characterized in that: A flow meter is arranged at the rear section of the circulation pump.

4. The high-concentration organic wastewater treatment system according to claim 1, characterized in that: A temperature monitor B is provided at the rear end of the heat exchanger unit through the pipeline connecting the catalytic membrane group; a temperature monitor C is provided at the front end of the cooling water pipeline entering the heat exchanger unit.

5. The high-concentration organic wastewater treatment system according to claim 1, characterized in that: A pressure transmitter B is installed at the rear section of the safety filter.

6. The high-concentration organic wastewater treatment system according to claim 1, characterized in that: The electrocatalytic membrane group unit is composed of a plurality of electrode assemblies, and a transparent water inlet sight glass is arranged at the water inlet of each electrode assembly.

7. The high-concentration organic wastewater treatment system according to claim 1, characterized in that: The gas outlet pipeline is connected to the absorption tower, and the absorption tower is connected to the fan.

Images