CN217103385U - Electroplating effluent retrieval and utilization and processing system - Google Patents
Electroplating effluent retrieval and utilization and processing system Download PDFInfo
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- CN217103385U CN217103385U CN202220733273.7U CN202220733273U CN217103385U CN 217103385 U CN217103385 U CN 217103385U CN 202220733273 U CN202220733273 U CN 202220733273U CN 217103385 U CN217103385 U CN 217103385U
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Abstract
The utility model relates to an electroplating effluent retrieval and utilization and processing system, its structure includes the former pond, pH adjustment tank, relay groove, many medium filter, safety filter ware, RO reverse osmosis unit, first reaction tank, second reaction tank, coagulating basin, flocculation tank, precipitation tank, pH adjustment tank and the discharge groove that connect gradually through the pipeline, and RO reverse osmosis unit still passes through pipe connection recovery water tank, and the delivery pipe is connected to the discharge groove. The utility model has the advantages that: 1) compared with the prior art, the recycling part reduces the dosage of the medicine, so that the recycling water quality is improved; 2) compared with the prior art, the treated water amount of the wastewater part is greatly reduced, so that the designed water pool is also reduced, and the investment cost is saved; 3) compared with the prior art, the risk that the heavy metal indexes of the RO concentrated water exceed the standard is avoided; 4) compared with other recovery technologies, the method avoids the corrosion of direct reuse to equipment.
Description
Technical Field
The utility model relates to an electroplating wastewater recycling and treating system, which belongs to the technical field of wastewater treatment.
Background
In the prior art, aiming at the recycling treatment of electroplating wastewater, a recycling technical process commonly used in the water treatment industry is a treatment method of chemical precipitation and RO (figure 1), wherein the chemical precipitation method comprises the steps of adding a medicament into the wastewater, converting dissolved heavy metal into a water-insoluble compound for precipitation under the condition that the pH value is more than 8, and separating the compound from water, thereby achieving the purpose of removing the heavy metal. The chemical precipitation effluent is treated by RO to achieve the purpose of recycling.
The above treatment process has the disadvantages that the pH value needs to be adjusted to be more than 8, the dosage is large, so that a large amount of ions are introduced, the TDS concentration entering the RO system is high, and the RO recovery rate is reduced; the RO concentrated water needs to flow back to the front-stage chemical precipitation system for secondary treatment, so that the operation cost and the investment cost are increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electroplating effluent retrieval and utilization and processing system, its purpose aims at overcoming the above-mentioned not enough that prior art exists, realizes electroplating effluent retrieval and utilization and discharge to reach standard, energy saving and emission reduction.
The technical solution of the utility model: the utility model provides an electroplating effluent retrieval and utilization and processing system, its structure includes former pond, pH adjustment tank, relay groove, many medium filter, safety filter ware, RO reverse osmosis unit, first reaction tank, second reaction tank, coagulating basin, flocculation groove, precipitation tank, pH back adjustment groove and the discharge groove that connect gradually through the pipeline, and RO reverse osmosis unit still passes through pipe connection recovery water tank, and the discharge pipe is connected to the discharge groove.
Preferably, a raw water tank delivery pump is arranged on a pipeline between the raw water tank and the pH adjusting tank, a relay tank booster pump is arranged on a pipeline between the relay tank and the multi-media filter, an RO high-pressure pump is arranged on a pipeline between the cartridge filter and the RO reverse osmosis device, and a delivery water pump is arranged on a discharge pipe connected with the discharge tank.
Preferably, the water outlet end of the cartridge filter is provided with a pressure indicator, and the outlet of the delivery water pump is provided with a heavy metal online instrument.
Preferably, the reverse osmosis membrane of the RO reverse osmosis device is a low-pressure composite membrane.
The utility model has the advantages that: 1) compared with the prior art, the recycling part reduces the dosage of the medicine, so that the recycling water quality is improved;
2) compared with the prior art, the treated water amount of the wastewater part is greatly reduced, so that the designed water pool is also reduced, and the investment cost is saved;
3) compared with the prior art, the risk that the heavy metal indexes of the RO concentrated water exceed the standard is avoided;
4) compared with other recovery technologies, the method avoids the corrosion of direct reuse to equipment.
Drawings
FIG. 1 is a schematic view of a system for recycling and treating electroplating wastewater in the prior art.
FIG. 2 is a schematic structural view of the system for recycling and treating electroplating wastewater.
In the figure, 1 is a raw water tank, 2 is a raw water tank transfer pump, 3 is a pH adjustment tank, 4 is a relay tank, 5 is a relay tank booster pump, 6 is a multi-media filter, 7 is a cartridge filter, 8 is an RO high-pressure pump, 9 is an RO reverse osmosis apparatus, 10 is a first reaction tank, 11 is a second reaction tank, 12 is a coagulation tank, 13 is a flocculation tank, 14 is a sedimentation tank, 15 is a pH adjustment tank, 16 is a discharge tank, 17 is a transfer water pump, and 18 is a recovery water tank.
Detailed Description
The present invention will be described in further detail with reference to examples and embodiments.
As shown in fig. 2, the electroplating wastewater recycling and treating system comprises a raw water pond 1, a pH adjusting tank 3, a relay tank 4, a multi-media filter 6, a cartridge filter 7, an RO reverse osmosis device 9, a first reaction tank 10, a second reaction tank 11, a coagulation tank 12, a flocculation tank 13, a sedimentation tank 14, a pH adjusting tank 15 and a discharge tank 16 which are sequentially connected through pipelines, wherein the RO reverse osmosis device 9 is further connected with a recovery water tank 18 through a pipeline, and the discharge tank 16 is connected with a discharge pipe. A raw water pool delivery pump 2 is arranged on a pipeline between the raw water pool 1 and the pH adjusting tank 3, a relay tank booster pump 5 is arranged on a pipeline between the relay tank 4 and the multi-media filter 6, an RO high-pressure pump 8 is arranged on a pipeline between the cartridge filter 7 and the RO reverse osmosis device 9, and a delivery water pump 17 is arranged on a delivery pipe connected with the discharge tank 16.
Examples
According to the structure, when the electroplating wastewater treatment device works, the water quality of raw electroplating wastewater is generally 2-5 in pH value, and the raw electroplating wastewater is strong in corrosivity and is not suitable for direct recovery.
Considering that the pH value is firstly adjusted to be 5-6, the types of electroplating wastewater are more, such as nickel-containing wastewater and copper-containing wastewater, and the pH values of different heavy metal ions converted into water-insoluble compound precipitates are different, and the optimal pH value needs to be determined according to the characteristics of the metal ions to prevent insoluble substances from being generated.
The wastewater is collected by the raw water pool 1 and discharged into the pH adjusting tank 3 to adjust the pH to about 5, and then enters the relay tank 4. The effluent enters a multi-medium filter 6 through a relay tank booster pump 5, and H is added into the pipeline 2 SO 4 NaOH is used for accurately adjusting the pH value, the pH value is kept to be about 6, and the multi-media filter 6 can remove substances such as suspended matters, particles, colloid and the like in raw water. The multi-media filter 6 preferably contains multi-layer filter media with different materials, can completely filter impurities insoluble in water, and ensures SDI<And 5, the strong protective barrier of the later-stage RO. The effluent of the multi-media filter 6 enters a cartridge filter 7 to remove suspended matters with the diameter of more than 5 microns so as to protect the RO membrane from being blocked, a pressure indicator is arranged at an outlet, and the filter element is replaced when the pressure difference is increased to a set value. In order to meet the requirement of RO water inlet, a non-oxidizing bactericide and a reducing agent are preferably added to the raw water before the raw water enters the cartridge filter 7 for sterilization and removal of residual chlorine, and the scale inhibitor is added to effectively inhibit scale under the condition that the LSI index on the RO concentrated water side is less than or equal to 2.3. The outlet water of the cartridge filter 7 passes through an RO high-pressure pump 8And (2) the wastewater enters an RO reverse osmosis device 9, RO is the core part of the desalination of the system, the water after reverse osmosis treatment can remove most of inorganic salts, organic matters, microorganisms and the like, the reverse osmosis membrane preferably adopts the most advanced low-pressure composite membrane, the desalination rate of a single membrane reaches 99.8%, the desalination rate of the system is not less than 95%, and the recovery rate is not less than 50%. The RO produced water enters a recovery water tank 17 for recycling, and the conductivity can reach below 100 us/cm.
The concentrated RO concentrated water enters a first reaction tank 10 and is added with H 2 SO 4 NaOH is used for maintaining the pH value to be about 8-10, and a recapture agent is added into the second reaction tank 11, wherein the recapture agent preferably contains a large number of active groups, sulfur atoms have small electronegativity and large radius, electrons are volatilized and are polarized and deformed, a negative electric field is generated to capture cations and tend to form bonds, and insoluble dithiocarbamate can be generated with heavy metals. Then enters a coagulation tank 12 and a flocculation tank 13 in sequence, and FeSO is added 4 And PAM to remove heavy metal ions. And the effluent of the flocculation tank 13 enters a sedimentation tank 14 for mud-water separation, the residual sludge is discharged into a sludge system on time through a sludge discharge pump, qualified supernatant flows into a wastewater pH adjustment tank 15 to adjust the pH to 6-9 and then enters a drainage tank 16, the wastewater reaching the standard is discharged into other systems or is directly discharged through a drainage tank 16 and a water pump 17, and the outlet of the water pump is provided with a heavy metal online instrument for monitoring the effluent quality.
Aiming at the problems in the prior art, the adopted treatment technology is an RO + RO concentrated water precipitation method. The pH value of the raw water is adjusted to 5-6, the heavy metal reacts with alkali in the process, and water-insoluble compound precipitation is not generated, and the raw water is recycled through an RO membrane. The produced concentrated water reaches the discharge standard through the traditional chemical precipitation method. The water treatment amount and treatment equipment of the chemical precipitation method can be greatly reduced, and the investment cost is reduced.
All the above components are prior art, and those skilled in the art can use any model and existing design that can implement their corresponding functions.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides an electroplating effluent retrieval and utilization and processing system, its characterized in that includes former pond (1), pH adjusting tank (3), relay groove (4), multimedium filter (6), safety filter (7), RO reverse osmosis unit (9), first reaction tank (10), second reaction tank (11), coagulating basin (12), flocculation tank (13), precipitation tank (14), pH adjusting tank (15) and the groove of releasing current (16) that connect gradually through the pipeline, RO reverse osmosis unit (9) still through pipe connection recovery water tank (18), the delivery pipe is connected to the groove of releasing current (16).
2. The electroplating wastewater recycling and treating system according to claim 1, wherein a raw water tank transfer pump (2) is arranged on a pipeline between the raw water tank (1) and the pH adjusting tank (3), a relay tank booster pump (5) is arranged on a pipeline between the relay tank (4) and the multi-media filter (6), an RO high-pressure pump (8) is arranged on a pipeline between the security filter (7) and the RO reverse osmosis device (9), and a delivery water pump (17) is arranged on a discharge pipe connected with the flow discharge tank (16).
3. The electroplating wastewater recycling and treating system as claimed in claim 2, wherein the outlet end of the cartridge filter (7) is provided with a pressure indicator, and the outlet of the delivery water pump (17) is provided with a heavy metal on-line instrument.
4. The recycling and treating system for electroplating wastewater according to any one of claims 1 to 3, wherein the reverse osmosis membrane of the RO reverse osmosis device (9) is a low-pressure composite membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220733273.7U CN217103385U (en) | 2022-03-30 | 2022-03-30 | Electroplating effluent retrieval and utilization and processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220733273.7U CN217103385U (en) | 2022-03-30 | 2022-03-30 | Electroplating effluent retrieval and utilization and processing system |
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| CN217103385U true CN217103385U (en) | 2022-08-02 |
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| CN202220733273.7U Active CN217103385U (en) | 2022-03-30 | 2022-03-30 | Electroplating effluent retrieval and utilization and processing system |
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