Recyclable sewage treatment system for treating complexing copper waste liquid based on physicochemical method
Through the sewage treatment system based on the physical and chemical method, the problem of the difficulty in removing copper ions and organic matter in the complex copper waste liquid containing EDTA is solved in the prior art, efficient removal and resource recovery are achieved, treatment costs and land occupation are reduced, and there are good environmental benefits and application prospects.
Patent Information
- Application Number
- CN202421266735.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-04
AI Technical Summary
The prior art is difficult to effectively remove copper ions and organic matter from complex copper waste liquid containing EDTA, and the treatment facilities are large, the area covers a large area and the operating cost are high, so the waste liquid resource utilization cannot be achieved.
The recyclable sewage treatment system based on the physical and chemical method is adopted to achieve efficient removal of copper ions and EDTA through components such as dosing reaction tanks, dehydrators, filtrate tanks, PH regulation reaction tanks, catalytic self-electrolysis reaction tanks and ozone catalytic oxidation tanks.
The copper ion removal rate in the waste liquid reached 99.9%, the EDTA recovery rate reached 80% to 95%, and the organic matter removal rate reached 98%. At the same time, the investment and operating costs of the treatment facilities were reduced, and it had good environmental benefits and application prospects.
Smart Images
Figure CN222556757U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wastewater treatment, in particular to a recyclable sewage treatment system for treating complex copper waste liquid based on a physical and chemical method. Background Art
[0002] In recent years, with the rapid development of electroplating, printed circuit boards, photovoltaics and other industries in my country, the discharge of heavy metal waste liquid has attracted people's attention, and its wastewater / waste liquid treatment is becoming more and more important. One of the EDTA-containing complex copper waste liquid contains CODCr22000-30000mg / L and a copper concentration of about 5000mg / L. The waste liquid contains high organic matter and extremely high copper concentration, which is of recycling significance. Conventional wastewater treatment uses Fenton advanced oxidation technology to break the complex and release copper ions. Under alkaline conditions, copper ions are removed by precipitation. After the copper ions are removed, the wastewater needs to undergo biochemical treatment to meet the standards. This treatment method cannot realize the resource utilization of waste liquid. At the same time, the treatment facilities require large investment, occupy a large area, and have high operating costs. Utility Model Content
[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model designs a recyclable sewage treatment system based on the physical and chemical method for treating the complex copper waste liquid. The utility model adopts the physical and chemical treatment technology, and has the advantages of simple process composition, stable operation effect, few structures, low investment cost, and easy operation. The specific technical scheme is as follows:
[0004] A recyclable sewage treatment system for treating complex copper waste liquid based on a physicochemical method comprises a dosing reaction tank, wherein the dosing reaction tank is connected to a first dehydrator, the first dehydrator is connected to a first filtrate tank, the first filtrate tank is connected to a pH adjustment reaction tank, the pH adjustment reaction tank is connected to a second dehydrator, the second dehydrator is connected to a second filtrate tank, the second filtrate tank is connected to a residual liquid tank, the residual liquid tank is connected to a catalytic self-electrolysis reaction tank, the catalytic self-electrolysis reaction tank is connected to a first neutralization coagulation sedimentation tank, the first neutralization coagulation sedimentation tank is connected to a filtration system, the filtration system is connected to an ozone catalytic oxidation tank, the ozone catalytic oxidation tank is connected to a second neutralization coagulation sedimentation tank, the second neutralization coagulation sedimentation tank is connected to a third dehydrator, the third dehydrator is connected to a third filtrate tank and the first neutralization coagulation sedimentation tank at the same time, and the third filtrate tank is connected to the first neutralization coagulation sedimentation tank.
[0005] Preferably, a linkage liquid level meter is provided in the second filtrate tank.
[0006] Preferably, the second filtrate tank is connected to the catalytic self-electrolysis reaction tank via a lift pump.
[0007] Preferably, a pH meter is provided in the catalytic self-electrolysis reaction cell.
[0008] Preferably, the filtration system is connected to the ozone catalytic oxidation tank via a lift pump.
[0009] Preferably, a pH meter is provided in the first neutralization coagulation sedimentation tank.
[0010] Preferably, a pH meter is provided in the second neutralization coagulation sedimentation tank.
[0011] Preferably, the pH value in the drug addition reaction tank is 8-10, and the pH value in the pH adjustment reaction tank is 1-2.
[0012] Preferably, the sludge produced by the first dehydrator is copper hydroxide sludge.
[0013] Preferably, the sludge produced by the second dehydrator is EDTA crystallized sludge.
[0014] Compared with the prior art, the beneficial effects of the utility model are:
[0015] The utility model can achieve a copper ion removal rate of 99.9% in waste liquid through a physicochemical method, that is, the copper content in the water of the waste liquid is reduced from 5000mg / L to below 2mg / L after the physicochemical treatment, and further recover high-concentration EDTA in the waste liquid, with an EDTA recovery rate of 80%-95%. At the same time, the organic matter removal rate in the waste liquid can reach 98%, that is, the chemical oxygen demand in the water of the waste liquid is reduced from 22000-30000mg / L to below 500mg / L after the physicochemical treatment. The utility model has the advantages of simple process composition, stable operation effect, few structures, low investment cost, simple operation, etc. It is highly targeted to eligible projects and has good environmental benefits and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0017] Figure 1 It is a process flow diagram of the utility model. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0019] See also Figure 1 , an embodiment provided by the utility model is as follows:
[0020] A recyclable sewage treatment system for treating complex copper waste liquid based on a physicochemical method comprises a dosing reaction tank, the dosing reaction tank is connected to a first dehydrator, the first dehydrator is connected to a first filtrate tank, the first filtrate tank is connected to a pH adjustment reaction tank, the pH adjustment reaction tank is connected to a second dehydrator, the second dehydrator is connected to a second filtrate tank, the second filtrate tank is connected to a residual liquid tank, the residual liquid tank is connected to a catalytic self-electrolysis reaction tank, the catalytic self-electrolysis reaction tank is connected to a first neutralization coagulation sedimentation tank, the first neutralization coagulation sedimentation tank is connected to a filtration system, the filtration system is connected to an ozone catalytic oxidation tank, the ozone catalytic oxidation tank is connected to a second neutralization coagulation sedimentation tank, the second neutralization coagulation sedimentation tank is connected to a third dehydrator, the third dehydrator is connected to a third filtrate tank and the first neutralization coagulation sedimentation tank at the same time, and the third filtrate tank is connected to the first neutralization coagulation sedimentation tank.
[0021] Specific usage:
[0022] The production waste liquid is pumped to the dosing reaction tank through the workshop, and calcium hydroxide is added to the dosing reaction tank to control the pH value at 8-10. After a rapid reaction, it flows to the first dehydrator by gravity for dehydration. The sludge produced is copper hydroxide sludge with high copper content and high recovery value. The filtrate flows to the first filtrate tank by gravity, and the filtrate is pumped to the pH adjustment reaction tank;
[0023] The pH value is controlled at 1-2 by adding sulfuric acid / hydrochloric acid into the pH adjustment reaction tank, and the reaction is carried out for 30 minutes to generate white crystals, which flow to the second dehydrator by gravity for dehydration. The dehydrated white substance is EDTA, which can be recycled after washing with water and has a high recovery value. The filtrate and the washing wastewater are temporarily stored in the second filtrate tank. A liquid level meter is provided in the second filtrate tank. When the liquid level reaches the set value, it is pumped into the residual liquid tank, and dilute sulfuric acid is added to the residual liquid tank to control the pH value, and then pumped to the catalytic self-electrolysis reaction tank;
[0024] The lifting pump lifts the wastewater in the residual liquid pool to the catalytic self-electrolysis reaction pool, where a catalytic oxidation-reduction reaction occurs. The effluent from the catalytic self-electrolysis reaction pool flows by gravity into the first neutralization coagulation sedimentation pool. The first neutralization coagulation sedimentation pool and the second neutralization coagulation sedimentation pool are equipped with a pH meter. Under the automatic monitoring of the pH meter, calcium hydroxide / sodium hydroxide is added to keep the pH of the wastewater at a slightly alkaline environment of about 10. At the same time, polyacrylamide (PAM) is added to gradually aggregate the suspended matter and pollutants in the water to form large suspended matter, thereby accelerating the precipitation of the particles. After precipitation, the bottom sludge flows by gravity to the third dehydrator for dehydration, and the filtrate is sent to the third filtrate pool. The filtered effluent is extracted It is then moved to the ozone catalytic oxidation tank for further treatment. The strong oxidizing property of ozone and the efficient catalytic activity of the catalyst are used to further oxidize and decompose the residual difficult-to-degrade organic matter and complexes in the wastewater. The effluent from the ozone catalytic oxidation tank is sent to the second neutralization coagulation sedimentation tank. Under the automatic monitoring of the pH meter, calcium hydroxide / sodium hydroxide and polyacrylamide (PAM) are added to remove the remaining copper ions. After the reaction is complete, the supernatant is tested to meet the standards. The wastewater is connected to the pipeline network for discharge to meet the standards. The precipitated sludge flows by gravity to the third dewatering machine. The third dewatering machine effluents the filtrate formed by dehydration to the third filtrate tank for temporary storage. The third filtrate tank then pumps the filtrate to the first neutralization coagulation sedimentation tank for multiple cycle treatments.
[0025] At the same time, the sludge is bagged after being dehydrated by the first and second dehydrators and outsourced for regular treatment.
[0026] The utility model has the advantages of simple treatment process, low treatment cost, and not easy to generate secondary pollutants.
[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A recyclable sewage treatment system for treating complex copper waste liquid based on physical and chemical methods, characterized in that: It includes a dosing reaction tank, the dosing reaction tank is connected to a first dehydrator, the first dehydrator is connected to a first filtrate tank, the first filtrate tank is connected to a PH adjustment reaction tank, the PH adjustment reaction tank is connected to a second dehydrator, the second dehydrator is connected to a second filtrate tank, the second filtrate tank is connected to a residual liquid tank, the residual liquid tank is connected to a catalytic self-electrolysis reaction tank, the catalytic self-electrolysis reaction tank is connected to a first neutralization coagulation sedimentation tank, the first neutralization coagulation sedimentation tank is connected to a filtration system, the filtration system is connected to an ozone catalytic oxidation tank, the ozone catalytic oxidation tank is connected to a second neutralization coagulation sedimentation tank, the second neutralization coagulation sedimentation tank is connected to a third dehydrator, the third dehydrator is simultaneously connected to a third filtrate tank and the first neutralization coagulation sedimentation tank, and the third filtrate tank is connected to the first neutralization coagulation sedimentation tank.
2. The recyclable sewage treatment system based on physical and chemical method for treating complex copper waste liquid according to claim 1 is characterized in that: A liquid level meter is provided in the second filtrate tank.
3. The recyclable sewage treatment system based on physical and chemical method for treating complex copper waste liquid according to claim 1 is characterized in that: The residual liquid pool is connected to the catalytic self-electrolysis reaction pool via a lifting pump.
4. The recyclable sewage treatment system based on physical and chemical method for treating complex copper waste liquid according to claim 1 is characterized in that: A pH meter is arranged in the catalytic self-electrolysis reaction cell.
5. The recyclable sewage treatment system based on physical and chemical method for treating complex copper waste liquid according to claim 1 is characterized in that: The filtration system is connected to the ozone catalytic oxidation tank via a lift pump.
6. The recyclable sewage treatment system based on physical and chemical method for treating complex copper waste liquid according to claim 1 is characterized in that: A pH meter is provided in the first neutralization coagulation sedimentation tank.
7. The recyclable sewage treatment system based on physical and chemical method for treating complex copper waste liquid according to claim 1 is characterized in that: A pH meter is provided in the second neutralization coagulation sedimentation tank.