CN216737830U - Nickel recovery processing system of nickeliferous waste water - Google Patents
Nickel recovery processing system of nickeliferous waste water Download PDFInfo
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- CN216737830U CN216737830U CN202122617528.1U CN202122617528U CN216737830U CN 216737830 U CN216737830 U CN 216737830U CN 202122617528 U CN202122617528 U CN 202122617528U CN 216737830 U CN216737830 U CN 216737830U
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Abstract
The utility model provides a nickel recovery processing system of nickeliferous waste water, including the raw water tank, the bag filter, the resin tank that embeds there is nickel adsorption column, regeneration system and PLC control system, raw water tank bottom is equipped with the delivery port and links to each other with the bag filter water inlet, the resin tank upper end is equipped with the water inlet and links to each other with the bag filter delivery port, regeneration system includes regeneration acid case, be equipped with the sulphuric acid entry on the resin tank and be connected with regeneration acid case, be equipped with neutral nickel sulfate export on the resin tank, acid nickel sulfate export and acid tail liquid export, the sulphuric acid regeneration is passed through after the nickel adsorption column saturation, the regeneration produces neutral nickel sulfate and carries to plating bath recycle, regeneration acid nickel sulfate recycles in returning to raw water tank after the PH regulation, regeneration acid tail liquid is used for repeated regeneration. The utility model has reasonable structural design, good recovery effect and basically no nickel loss, solves the problem of recycling heavy metal ion nickel by using the nickel electroplating rinse solution, reduces the production cost, and reduces the pollution discharge and the resource waste.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, relates to an electroplating wastewater recovery system, and particularly relates to a nickel recovery treatment system for nickel-containing wastewater.
Background
Electroplating is one of three major pollution industries, the problems of wastewater discharge and wastewater treatment are more and more emphasized, energy conservation and emission reduction of electroplating wastewater are targets continuously pursued by the industry, particularly, Ni2+ or nickel complex ions in nickel-containing electroplating wastewater have great harm to the environment, and a large amount of heavy metal nickel ions are contained in a nickel-electroplating rinsing solution of a battery steel shell and need to be discharged or recycled after reaching the standard through reasonable treatment.
The traditional treatment method of the nickel electroplating rinsing liquid is simple concentration treatment, and then the nickel electroplating rinsing liquid is disposed as hazardous waste without recycling the concentrated liquid. However, the concentrated solution contains a large amount of nickel ions (the content of nickel sulfate is 10-20 g/L), and if the concentrated solution is disposed of as hazardous waste, great waste is caused; if the concentrated solution is directly recycled into the plating solution, the concentrated solution contains a large amount of organic impurities and other metal impurities, which bring about a lot of poor electroplating and affect the product quality.
According to the investigation, the traditional Chinese patent CN201220153317.5, namely a nickel-containing electroplating wastewater zero-discharge concentration treatment system, comprises a nickel-containing wastewater collecting tank, a concentration water tank, a circulating pump, a TMF (Tetramethylbenzidine) filtering device, a purification water tank, a first security filter, a first-stage RO (reverse osmosis) concentration system, a second-stage RO concentration water tank, a booster water pump, a second security filter, a third-stage RO concentration system, a third-stage RO concentration water tank and an evaporator which are sequentially connected through a pipeline; the TMF filtering device is connected back to the concentrated water tank through another pipeline; also comprises a first pH adjusting device and a second pH adjusting device. The treatment can realize zero discharge of electroplating wastewater, and can also recover salts, but the recovered salts evaporate liquid into solid, the energy consumption of the evaporator is large, the recovered salts still have the problem of sale, the structural design is not reasonable enough, and the cost is also high.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide a nickel recovery treatment system for nickel-containing wastewater, which has simple and reasonable structural design and good recovery effect, resin adsorption is adopted, the recovered regenerated liquid is used as electroplating liquid for supplement, and the whole system is controlled by a PLC.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a nickel recovery processing system of nickeliferous waste water which characterized in that: the system comprises a raw water tank for containing a nickel-containing wastewater concentrated solution, a bag filter, a resin tank with a built-in nickel adsorption column, a regeneration system and a PLC (programmable logic controller) control system, wherein a water outlet is formed in the bottom of the raw water tank and is connected with a water inlet of the bag filter, a water inlet is formed in the upper end of the resin tank and is connected with a water outlet of the bag filter, the regeneration system comprises a regeneration acid tank with 5% -20% of sulfuric acid built in, a sulfuric acid inlet is formed in the resin tank and is connected with the regeneration acid tank, a neutral nickel sulfate outlet, an acidic nickel sulfate outlet and an acidic tail solution outlet are formed in the resin tank, the nickel adsorption column is saturated and regenerated by sulfuric acid, the neutral nickel sulfate generated by regeneration is conveyed to an electroplating bath for recycling, the regenerated acidic nickel sulfate is regulated by PH and then returned to the raw water tank for recycling, and the regenerated acidic tail solution is returned to the regeneration acid tank for repeated regeneration.
As the improvement, nickel recovery processing system still includes acid nickel case, neutral nickel case and waste water tank, and the upper end of acid nickel case is equipped with the acid nickel sulfate export of import and resin jar and is connected, and the lower extreme of acid nickel case is equipped with the export and is connected with former water tank, and the upper end of neutral nickel case is equipped with the neutral nickel sulfate export of import and resin jar and is connected, and the lower extreme of resin jar is equipped with the waste water export and is connected with the waste water tank.
Furthermore, a booster lift pump and a raw water control valve are arranged on a pipeline between the raw water tank and the cloth bag filter.
Furthermore, the water flow direction of the concentrated solution in the resin tank is from top to bottom, and the water inlet flow is controlled to be 0.5-1 t/h.
Furthermore, the regeneration system also comprises a regenerated alkali box connected with the sulfuric acid inlet on the resin tank, the upper end of the resin tank is also provided with a clear water inlet, and the clear water inlet is connected with a clear water box. Furthermore, an acid liquor lift pump and an acid liquor control valve are arranged on a pipeline between the regenerated acid tank and the sulfuric acid inlet of the resin tank.
Furthermore, a clear water lifting pump and a clear water control valve are arranged on a pipeline between the clear water inlet and the clear water tank.
Further, an acid nickel lift pump and an acid nickel control valve are arranged on a pipeline between the acid nickel tank and the raw water tank; control valves are arranged on pipelines among the acid nickel box, the neutral nickel box and the resin tank.
Compared with the prior art, the utility model has the advantages that: the resin tank and the regeneration system are arranged, nickel in the wastewater is adsorbed through the nickel adsorption column, organic impurities and other harmful substances can be reduced by more than 90%, the wastewater is regenerated by using 5-20% sulfuric acid after adsorption saturation, and the regenerated liquid is used as effective supplement of electroplating liquid and basically does not cause adverse effect on the electroplating bath, so that the aim of recycling is fulfilled; the whole system adopts a PLC control system to operate fully automatically. The utility model has reasonable structural design, good recovery effect and no nickel loss basically, effectively solves the problem of recycling heavy metal ion nickel by the nickel electroplating rinse solution, greatly reduces the production cost and the pollution emission, and reduces the resource waste.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a process flow diagram of an embodiment of the utility model.
Detailed Description
The utility model is described in further detail below with reference to the following examples of the drawings.
As shown in figures 1 and 2, a nickel recovery processing system for nickel-containing wastewater comprises a raw water tank 1 for containing nickel-containing wastewater concentrated solution, a cloth bag filter 2, a resin tank 3 with a nickel adsorption column arranged therein, an acidic nickel tank 5, a neutral nickel tank 6, a wastewater tank 7, a regeneration system and a PLC control system, wherein the bottom of the raw water tank 1 is provided with a water outlet connected with a water inlet of the cloth bag filter 2, the upper end of the resin tank 3 is provided with a water inlet connected with a water outlet of the cloth bag filter 2, the regeneration system comprises a regenerated acid tank 4 and a regenerated alkali tank 9, 5% -20% sulfuric acid is arranged in the regenerated acid tank 4, a sulfuric acid inlet arranged on the resin tank 3 is connected with the regenerated acid tank 4 and the regenerated alkali tank 9, the resin tank 3 is provided with a neutral nickel sulfate outlet, an acidic tail solution outlet and a wastewater outlet, the upper end of the acidic nickel tank 5 is provided with an inlet connected with the acidic nickel sulfate outlet of the resin tank 3, the lower extreme of acid nickel case 5 is equipped with the export and is connected with former water tank 1, and the upper end of neutral nickel case 6 is equipped with the neutral nickel sulfate export of import and resin jar 3 and is connected, and the waste water outlet of the lower extreme of resin jar 3 is connected with waste water tank 7, and the acid tail liquid export of resin jar 3 is connected with regeneration acid case 4. A booster lift pump 10 and a raw water control valve are arranged on a pipeline between the raw water tank 1 and the cloth bag filter 2. The upper end of the resin tank 3 is also provided with a clear water inlet which is connected with a clear water tank 8; a clear water lifting pump 12 and a clear water control valve are arranged on a pipeline between the clear water inlet and the clear water tank 8; an acid liquor lift pump 11 and an acid liquor control valve are arranged on a pipeline between the regenerated acid tank 4 and the sulfuric acid inlet of the resin tank 3; an acid nickel lift pump 13 and an acid nickel control valve are arranged on a pipeline between the acid nickel tank 5 and the raw water tank 1; control valves are arranged on pipelines between the acid nickel box 5, the neutral nickel box 6 and the resin tank 3.
The PLC control system has two modes of program control and maintenance, the whole system runs in a full-automatic mode in the program control mode without manual intervention, and the system can be switched to the maintenance mode when the system breaks down or is stopped for maintenance.
The process flow is as follows:
the nickel electroplating rinsing liquid is primarily concentrated by a reverse osmosis system and enters a raw water tank 1, and the concentrated liquid passes through a booster lift pump 10 from the raw water tank 1, passes through a cloth bag filter 2 and enters a resin tank 3; the water flow direction of the concentrated solution in the resin tank 3 is from top to bottom, the water inlet flow is controlled to be 0.5-1 t/h, when the adsorption of the nickel adsorption column is saturated, a valve between the regenerated acid tank 4 and the resin tank 3 is opened, the nickel adsorption column is washed by 5% -20% sulfuric acid for regeneration, and neutral nickel sulfate and acidic nickel sulfate are regenerated (the content of nickel sulfate in the regenerated solution can reach more than 200 g/L). The regenerated neutral nickel sulfate flows into a neutral nickel box 6 for storage, and is conveyed to an electroplating bath through a metering pump for liquid level supplement (recycling); the regenerated acidic nickel sulfate flows into an acidic nickel tank 5 for storage, and returns to the original water tank 1 for recycling after pH adjustment; the regenerated acid tail liquid enters a regenerated acid box 4 to be used for repeated regeneration. After acid regeneration, resin needs to be replaced by alkali transformation, 5% -10% sodium hydroxide solution is prepared, and the resin is regenerated by adopting a treatment mode of soaking circulation. In general, the alkali transformation and replacement process is to prepare 5-10% sodium hydroxide solution and cool to normal temperature. 2. And (4) air flushing, namely flushing the water in the resin tank to a water discharge tank. 3. The alkali may be fed from top to bottom or from bottom to top. The alkali enters the resin tank 3 from the alkali cleaning water tank and then flows back to the alkali cleaning water tank. Soaking for a period of time, circulating for a period of time, soaking again, and circulating. Generally about 2 h. The pH value of the water can be found according to the judgment (between 10 and 12). 4. And after the air flushing and the alkali washing are finished, flushing residual alkali back to an alkali washing water tank.
The waste water can reduce organic impurities and other harmful substances by more than 90 percent after being adsorbed by the resin in the resin tank, thereby solving the problem that organic substances and other harmful substances in the electroplating recovery liquid enter a plating tank and eliminating adverse factors to the plating tank, and the content of the nickel sulfate in the treated recovery liquid is basically equivalent to that of the nickel sulfate in the plating tank.
The system of the embodiment has the advantages that:
firstly, resin adsorption is adopted, the adsorption effect is good, the cost is low, and organic impurities and other harmful substances can be reduced by more than 90%;
and secondly, other on-line recycling is carried out, more options are provided for the heavy metal part, valuable nickel and copper are replaced by ion exchange, electrolytic copper and electrolytic nickel are prepared by electrolysis (the electrolysis part of many enterprises is set, and concentrated solution containing copper or nickel is replaced), and the concentrated solution is sold for the outside, wherein the concentrated solution for the outside is also related to hazardous waste transfer, so that certain risk exists, the process adopted by the system can eliminate unnecessary links for the outside sales, and the generated regenerated solution directly returns to the electroplating bath, so that the economic benefit is better.
And thirdly, the whole system adopts a PLC control system to carry out full-automatic operation, and has obvious advantages.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a nickel recovery processing system of nickeliferous waste water which characterized in that: the system comprises a raw water tank for containing a nickel-containing wastewater concentrated solution, a bag filter, a resin tank with a built-in nickel adsorption column, a regeneration system and a PLC (programmable logic controller) control system, wherein a water outlet is formed in the bottom of the raw water tank and is connected with a water inlet of the bag filter, a water inlet is formed in the upper end of the resin tank and is connected with a water outlet of the bag filter, the regeneration system comprises a regeneration acid tank with 5% -20% of sulfuric acid built in, a sulfuric acid inlet is formed in the resin tank and is connected with the regeneration acid tank, a neutral nickel sulfate outlet, an acidic nickel sulfate outlet and an acidic tail solution outlet are formed in the resin tank, the nickel adsorption column is saturated and regenerated by sulfuric acid, the neutral nickel sulfate generated by regeneration is conveyed to an electroplating bath for recycling, the regenerated acidic nickel sulfate is regulated by PH and then returned to the raw water tank for recycling, and the regenerated acidic tail solution is returned to the regeneration acid tank for repeated regeneration.
2. The nickel recovery processing system of claim 1, wherein: the nickel recovery processing system still includes acid nickel case, neutral nickel case and waste water tank, and the upper end of acid nickel case is equipped with the acid nickel sulfate export of import and resin jar and is connected, and the lower extreme of acid nickel case is equipped with the export and is connected with former water tank, and the upper end of neutral nickel case is equipped with the neutral nickel sulfate export of import and resin jar and is connected, and the lower extreme of resin jar is equipped with the waste water export and is connected with the waste water tank.
3. The nickel recovery processing system of claim 1, wherein: and a booster lift pump and a raw water control valve are arranged on a pipeline between the raw water tank and the cloth bag filter.
4. The nickel recovery processing system of claim 1, wherein: the water flow direction of the concentrated solution in the resin tank is from top to bottom, and the water inlet flow is controlled to be 0.5-1 t/h.
5. The nickel recovery processing system according to claim 1, further comprising a regenerated caustic soda tank connected to the sulfuric acid inlet of the resin tank, wherein the upper end of the resin tank is further provided with a clean water inlet connected to the clean water tank.
6. The nickel recovery processing system of claim 1, wherein: and an acid liquor lift pump and an acid liquor control valve are arranged on a pipeline between the regenerated acid tank and the sulfuric acid inlet of the resin tank.
7. The nickel recovery processing system of claim 5, wherein: and a clear water lifting pump and a clear water control valve are arranged on a pipeline between the clear water inlet and the clear water tank.
8. The nickel recovery processing system of claim 2, wherein: an acid nickel lifting pump and an acid nickel control valve are arranged on a pipeline between the acid nickel tank and the raw water tank; control valves are arranged on pipelines among the acid nickel box, the neutral nickel box and the resin tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122617528.1U CN216737830U (en) | 2021-10-27 | 2021-10-27 | Nickel recovery processing system of nickeliferous waste water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122617528.1U CN216737830U (en) | 2021-10-27 | 2021-10-27 | Nickel recovery processing system of nickeliferous waste water |
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| CN216737830U true CN216737830U (en) | 2022-06-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105860A (en) * | 2022-07-21 | 2022-09-27 | 成都德傲生物科技有限公司 | Protein purification nickel column regeneration method and system |
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2021
- 2021-10-27 CN CN202122617528.1U patent/CN216737830U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105860A (en) * | 2022-07-21 | 2022-09-27 | 成都德傲生物科技有限公司 | Protein purification nickel column regeneration method and system |
| CN115105860B (en) * | 2022-07-21 | 2024-01-09 | 成都德傲生物科技有限公司 | Protein purification nickel column regeneration method and system |
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