CN117303474A - Process for recycling water and nonferrous metal main salt solution and extracting nonferrous metal in water washing tank - Google Patents
Process for recycling water and nonferrous metal main salt solution and extracting nonferrous metal in water washing tank Download PDFInfo
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- CN117303474A CN117303474A CN202311283568.4A CN202311283568A CN117303474A CN 117303474 A CN117303474 A CN 117303474A CN 202311283568 A CN202311283568 A CN 202311283568A CN 117303474 A CN117303474 A CN 117303474A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 164
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 158
- 239000002184 metal Substances 0.000 title claims abstract description 158
- 238000004064 recycling Methods 0.000 title claims abstract description 74
- 239000012266 salt solution Substances 0.000 title claims abstract description 64
- 238000005406 washing Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000008569 process Effects 0.000 title claims abstract description 39
- 238000011084 recovery Methods 0.000 claims abstract description 67
- 238000000926 separation method Methods 0.000 claims abstract description 57
- 150000003839 salts Chemical class 0.000 claims abstract description 44
- 238000009713 electroplating Methods 0.000 claims abstract description 29
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 239000010865 sewage Substances 0.000 claims abstract description 23
- 239000000243 solution Substances 0.000 claims abstract description 22
- 239000002351 wastewater Substances 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000007781 pre-processing Methods 0.000 claims abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 98
- 229910052759 nickel Inorganic materials 0.000 claims description 49
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 21
- 238000004070 electrodeposition Methods 0.000 claims description 14
- 239000012141 concentrate Substances 0.000 claims description 12
- 238000005363 electrowinning Methods 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 abstract description 16
- 239000000126 substance Substances 0.000 description 9
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 229910001453 nickel ion Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
- C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a process for recycling water, nonferrous metal main salt solution and extracting nonferrous metals from a water washing tank, and relates to the technical field of efficient recycling of electroplating wastewater. The process for recycling water, nonferrous metal main salt solution and extracting nonferrous metals in the water washing tank comprises the following steps: s1, preparing a workpiece, and placing the workpiece into an electroplating mother tank; s2, establishing a nonferrous metal main salt solution and water recycling part of the single-point recovery tank; s3, preprocessing and filtering the nonferrous metal main salt solution in the single-point position recovery tank; s4, conveying the filtered main salt solution to a separation membrane group for separation to obtain recycled water and high-concentration nonferrous metal main salt concentrated solution, wherein the purity of the purified metal reaches more than 99%, and the recovery rate of the nonferrous metal reaches more than 99%, so that the metal is sold according to futures of raw materials. Greatly reduces the running water consumption and sewage treatment cost of enterprises, greatly reduces the discharge loss of nonferrous metals, and greatly reduces the running cost of the enterprises.
Description
Technical Field
The invention relates to the technical field of high-efficiency recycling of electroplating wastewater, in particular to a process for recycling water, nonferrous metal main salt solution and extracting nonferrous metals in a water washing tank.
Background
Currently, the treatment methods for electroplating cleaning wastewater mainly include a chemical method, an ion exchange method, an evaporation concentration method, and the like, and among them, the chemical method is most widely used. The core of the chemical method is a coagulating sedimentation process, namely nickel hydroxide sediment is formed by utilizing chemical reaction of Ni2+ in the wastewater, and then the sediment is removed by a solid-liquid separation device, so that the purpose of removing nickel is achieved. If sodium hydroxide is adopted to adjust the pH value, the concentration of Ni2+ can be reduced to 1.2 mg/L according to the concentration of Ni2+ in the wastewater and when the pH value is more than 9.2; when the pH value is regulated to 10-12, ni2+ is removed more thoroughly, the concentration can be reduced to 0.2 mg/L, and then the concentration can be reduced to below 0.1 mg/L by being matched with a heavy metal capturing agent, so that the standard emission is realized. The ion exchange method can recover nonferrous metal ions, but the medicament consumption and the water consumption are large, and the recovery efficiency is not very high. The evaporation concentration method belongs to indiscriminate recovery, can not remove auxiliary additives and harmful components, can not be recycled, can only reduce emission, and has larger energy consumption. The prior art mainly solves the problem of standard discharge of enterprises, but causes the waste of resources: 1. the water resource is not reasonably recovered, and the wastewater after chemical treatment has the problem of high operation cost due to the addition of flocculant in the chemical treatment process, so that many enterprise water recovery devices are in a stagnation state, and water investment waste is caused. 2. The nickel ions, which are pollutants in the chemical treatment process, form nickel hydroxide sludge, which belongs to dangerous wastes, and are difficult to recycle and reuse due to the need of landfill disposal, so that the process for recycling water, nonferrous metal main salt solution and extracting nonferrous metals in the water washing tank is provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a process for recycling water, nonferrous metal main salt solution and extracting nonferrous metals in a water washing tank, which solves the problems that water resources are not reasonably recycled, and the wastewater after chemical treatment has high running cost due to the recycling utilization caused by adding flocculant in the chemical treatment process, so that water recycling equipment of a plurality of enterprises is in a stagnation state, and water investment is wasted. 2. The nickel ions as pollutants in the chemical treatment process form nickel hydroxide sludge, which belongs to dangerous waste, and is difficult to recycle and reuse due to the need of landfill disposal, thus causing the problem of noble metal resource waste.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the process for recycling water, nonferrous metal main salt solution and extracting nonferrous metal in the water washing tank comprises the following steps:
s1, preparing a workpiece, and placing the workpiece into an electroplating mother tank;
s2, establishing a nonferrous metal main salt solution and water recycling part of a single-point recovery tank, wherein the nonferrous metal main salt solution and water recycling part of the single-point recovery tank comprises a recovery tank, a pretreatment filtering and separation module;
s3, recycling the nonferrous metal main salt solution in the electroplating mother tank through the recycling tank, and preprocessing and filtering the nonferrous metal main salt solution in the single-point recycling tank and the nonferrous metal main salt solution in the water recycling part;
s4, conveying the filtered nonferrous metal main salt solution to a separation membrane group for separation to obtain reuse water and high-concentration nonferrous metal main salt concentrated solution;
s5, conveying the recycled water obtained after separation into the recovery tank, and conveying the high-concentration nonferrous metal main salt concentrated solution obtained after separation into an electroplating main tank for use;
s6, selecting whether water is added into the recovery tank according to the water level in the recovery tank.
Preferably, the type of the electroplating mother tank comprises nickel preplating, watt nickel, semi-bright nickel, bright nickel and pearl nickel, and the separation module is only used for concentrating and separating nonferrous metal main salt with high added value.
Preferably, the auxiliary additive used at the separation membrane group is not concentrated through the membrane, the physicochemical properties of the raw materials are not changed, and the concentration of the high-concentration nonferrous metal main salt concentrated solution is between 150 and 250 g/L.
Preferably, the amount of water added to the recovery tank is generally between 0 and 5%, and the recovery efficiency of the high-concentration nonferrous metal main salt concentrate separated at the separation module is between 0 and 5%.
Preferably, after the nonferrous metal main salt solution and the water recycling part of the single-point recycling tank are established, all the mixed water recycling of the recycling tank and the water washing tank is established, and the nonferrous metal resource part is extracted, wherein the mixed water recycling of the recycling tank and the water washing tank and the nonferrous metal resource part comprises a first flowing water washing tank, a second flowing water washing tank, a pretreatment filter tank, a separation membrane group, a nickel electrodeposition system, a recycling pure water tank, a sewage treatment system and a sewage pipe network.
Preferably, the nickel electro-deposition system in the mixed water recycling and non-ferrous metal resource extracting part of all the recovery tanks and the water washing tank is connected with the non-ferrous metal main salt solution of the single-point recovery tank and the separation membrane group in the water recycling part, and the non-ferrous metal main salt concentrated solution filtered by the separation membrane group in the non-ferrous metal main salt solution of the single-point recovery tank and the water recycling part is discharged into the nickel electro-deposition system in the mixed water recycling and non-ferrous metal resource extracting part of all the recovery tanks and the water washing tank when the electroplating mother tank is abnormal.
Preferably, the conductivity of the recycled pure water in the recycled pure water tank is below 5us/cm, and the purity of the nonferrous metal deposited in the nickel electrowinning system is above 99%.
Preferably, the concentration of nonferrous metal main salt contained in the wastewater generated by the electro-deposition in the nickel electro-deposition system is below 0.1g/L, and the wastewater is discharged from the nickel electro-deposition system to a sewage treatment system for reaching the treatment standard and then discharged into a sewage pipe network.
The invention provides a process for recycling water and nonferrous metal main salt solution and extracting nonferrous metals from a water washing tank. Compared with the prior art, the method has the following beneficial effects:
(1) The water washing tank can recycle water, nonferrous metal main salt solution and process for extracting nonferrous metals, and can recycle water resources, nonferrous metal main salt solution and new process for extracting nonferrous metal resources on line, thereby realizing efficient recycling of water and nickel resources.
(2) The concentration of main salt after concentration and separation is 150-250g/l, the concentrated main salt solution returns to the corresponding mother tank for continuous use, the consumption of main nonferrous metal salt corresponding to the mother tank raw material is greatly reduced, the lower main metal salt concentration in the recovery tank is maintained, the consumption of main nonferrous metal salt is greatly reduced, and the main salt recovery efficiency is more than 95%. The separated pure water is directly returned to the recovery tank, and only a trace amount of pure water is needed to be replenished every day, and the tank is not needed to be discharged frequently.
(3) The water washing tank is used for recovering water, nonferrous metal main salt solution and a process for extracting nonferrous metals, and after concentration and separation, the mixed concentrated solution with the concentration of 150-250g/l is used for extracting high-purity nonferrous metals, the purity of the purified metal reaches more than 99%, the recovery rate of the nonferrous metals is more than 99%, and the nonferrous metals are sold according to the price of the futures. Greatly reduces the running water consumption and sewage treatment cost of enterprises, greatly reduces the discharge loss of nonferrous metals, and greatly reduces the running cost of the enterprises.
Drawings
FIG. 1 is a process flow diagram of the nickel electroplating process of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides the following technical solutions:
example 1
The process for recycling water, nonferrous metal main salt solution and extracting nonferrous metal in the water washing tank comprises the following steps:
s1, preparing a workpiece, and placing the workpiece into an electroplating mother tank;
s2, establishing a nonferrous metal main salt solution and water recycling part of a single-point recovery tank, wherein the nonferrous metal main salt solution and water recycling part of the single-point recovery tank comprises a recovery tank, a pretreatment filtering and separating module;
s3, recycling the nonferrous metal main salt solution in the electroplating mother tank through the recycling tank, and preprocessing and filtering the nonferrous metal main salt solution in the single-point recycling tank and the nonferrous metal main salt solution in the water recycling part;
s4, conveying the filtered nonferrous metal main salt solution to a separation membrane group for separation to obtain reuse water and high-concentration nonferrous metal main salt concentrated solution;
s5, conveying the recycled water obtained after separation into the recovery tank, and conveying the high-concentration nonferrous metal main salt concentrated solution obtained after separation into an electroplating main tank for use;
s6, selecting whether water is added into the recovery tank according to the water level in the recovery tank.
The type of the electroplating mother tank comprises nickel preplating, watt nickel, semi-bright nickel, pearl nickel and the like, the separation module only concentrates and separates nonferrous metal main salt with high added value, the auxiliary additive used at the separation module is not concentrated through a membrane and does not change the physicochemical property of the raw materials, the concentration of the high-concentration nonferrous metal main salt concentrated solution is between 150 and 250g/L, the water adding amount in the recovery tank is usually between 0 and 5 percent, the recovery efficiency of the high-concentration nonferrous metal main salt concentrated solution separated at the separation module is between 0 and 5 percent, and the volume of the recycled water separated at the separation module is above 95 percent.
Example two
The process for recycling water, nonferrous metal main salt solution and extracting nonferrous metal in the water washing tank comprises the following steps:
s1, preparing a workpiece, and placing the workpiece into an electroplating mother tank;
s2, establishing all recovery tanks and washing tank mixed water for recycling and extracting nonferrous metal resource parts, wherein the recovery tanks and washing tank mixed water for recycling and extracting nonferrous metal resource parts comprise a first flowing washing tank, a second flowing washing tank, a pretreatment filter tank, a separation membrane group, a nickel electrodeposition system, a recycling pure water tank, a sewage treatment system and a sewage pipe network;
s3, pre-treating and filtering nonferrous metal main salt solution in the first flowing water washing tank;
s4, conveying the filtered nonferrous metal main salt solution to a separation membrane group for separation to obtain reuse water and high-concentration nonferrous metal main salt concentrated solution;
s5, conveying the recycled water obtained after separation to the second flowing water washing tank and the first flowing water washing tank after passing through the recycled pure water tank, and conveying the high-concentration nonferrous metal main salt concentrated solution obtained after separation to the electroplating main tank for use;
s6, selecting whether water is added into the reuse pure water tank according to the water level in the reuse pure water tank.
The type of the electroplating mother tank comprises nickel preplating, watt nickel, semi-bright nickel, pearl nickel and the like, the separation module only concentrates and separates nonferrous metal main salt with high added value, auxiliary additives used at the separation module are not concentrated through a membrane and do not change the physicochemical properties of the raw materials, the concentration of the high-concentration nonferrous metal main salt concentrate is between 150 and 250g/L, the water adding amount in the recovery tank is usually between 0 and 5 percent, the recovery efficiency of the high-concentration nonferrous metal main salt concentrate separated at the separation module is between 0 and 5 percent, the volume of the recycled water separated at the separation module is above 95 percent, the nonferrous metal main salt concentrate filtered by the separation module is discharged into the nickel electrodeposition system when the nonferrous metal main salt concentrate is returned to the electroplating mother tank, the concentration of the nonferrous metal main salt concentrate is over 250g/L, the recycled pure water in the recycled pure water is below 5us metal/cm, the deposited nonferrous metal in the nickel electrodeposition system is above 99 percent, the nickel deposition system is discharged into the sewage system to reach the standard after the sewage is discharged into the sewage treatment system from the sewage treatment system to the sewage treatment system with the concentration of which reaches the standard of 0.1.
Example III
The process for recycling water, nonferrous metal main salt solution and extracting nonferrous metal in the water washing tank comprises the following steps:
s1, preparing a workpiece, and placing the workpiece into an electroplating mother tank;
s2, establishing nonferrous metal main salt solution of a single-point recovery tank, a water recycling part and mixed water recycling of all recovery tanks and washing tanks, and extracting nonferrous metal resource parts;
s3, preprocessing and filtering nonferrous metal main salt solution in the single-point recovery tank, all recovery tanks and the washing tank;
s4, conveying the filtered nonferrous metal main salt solution to a separation membrane group for separation to obtain reuse water and high-concentration nonferrous metal main salt concentrated solution;
s5, conveying the recycled water obtained after separation into the recovery tank and the flowing water washing tank group, and conveying the high-concentration nonferrous metal main salt concentrated solution obtained after separation into an electroplating main tank for use;
s6, selecting whether water is added into the recovery tank according to the water level in the recovery tank.
The type of the electroplating mother tank comprises nickel preplating, watt nickel, semi-bright nickel, pearl nickel and the like, the separation module only concentrates and separates nonferrous metal main salt with high added value, the auxiliary additive used at the separation membrane module is not concentrated through a membrane and does not change the physicochemical property of the raw materials, the concentration of the high-concentration nonferrous metal main salt concentrated solution is between 150 and 250g/L, the water adding amount in the recovery tank is usually between 0 and 5 percent, the recovery efficiency of the high-concentration nonferrous metal main salt concentrated solution separated at the separation module is between 0 and 5 percent, the volume of the recycled water separated at the separation module is more than 95 percent, the nonferrous metal main salt solution and the water recycling part of the single-point recovery tank comprise recovery tanks, pretreatment filtration and separation modules, the nonferrous metal main salt solution in the electroplating mother tank is recovered through the recovery tanks, the non-ferrous metal main salt solution in the single-point recovery tank and the non-ferrous metal main salt solution in the water recycling part are pretreated and filtered, the mixed water recycling of all the recovery tanks and the water washing tanks, the non-ferrous metal resource extracting part comprises a first flowing water washing tank, a second flowing water washing tank, a pretreatment filtering tank, a separation membrane group, a nickel electro-deposition system, a recycling pure water tank, a sewage treatment system and a sewage pipe network, the mixed water recycling of all the recovery tanks and the water washing tanks, the nickel electro-deposition system in the non-ferrous metal resource extracting part is connected with the separation membrane group in the non-ferrous metal main salt solution and the water recycling part of the single-point recovery tank, and the non-ferrous metal main salt concentrate filtered by the separation membrane group in the non-ferrous metal main salt solution and the water recycling part is discharged into the mixed water recycling tank and the water washing tank when the non-ferrous metal main salt concentrate is recycled to the electroplating mother tank is abnormal, in a nickel electrowinning system for extracting nonferrous metal resources, the conductivity of recycled pure water in a recycled pure water tank is below 5us/cm, the purity of nonferrous metal deposited in the nickel electrowinning system is above 99%, the concentration of nonferrous metal main salt contained in wastewater generated by electrowinning in the nickel electrowinning system is below 0.1g/L, and the wastewater is discharged from the nickel electrowinning system to a sewage treatment system for treatment reaching standards and then discharged into a sewage pipe network.
Other nonferrous metals such as copper acid may be plated in addition to nickel plating.
And selling the nonferrous metals electrodeposited in the electrodeposition system according to the price of the raw material futures. Greatly reduces the running water consumption and sewage treatment cost of enterprises, greatly reduces the discharge loss of nonferrous metals, and greatly reduces the running cost of the enterprises; the separated pure water directly returns to the recovery tank, only a trace amount of pure water is needed to be supplemented every day, the frequent draining is not needed, the amount of sewage is reduced, the concentrated main salt solution returns to the corresponding mother tank to be used continuously, the amount of nonferrous metal main salt corresponding to the mother tank raw material is greatly reduced, the lower raw material metal main salt concentration in the recovery tank is maintained, and the consumption of nonferrous metal main salt is greatly reduced.
Based on the influence of different manufacturer technical conditions, the solution recovered by the recovery tank in the non-ferrous metal main salt solution and water recycling part of the single-point recovery tank is not conveyed back to the electroplating mother tank for use after being circularly separated in the part, but is directly conveyed to the first or pretreatment filtering part of the flowing water washing tank in the mixed water recycling and water washing tank of all the recovery tanks and the non-ferrous metal resource part, and is conveyed to the nickel electrodeposition system for non-ferrous metal deposition after being circularly carried out by the part.
And all that is not described in detail in this specification is well known to those skilled in the art.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The process for recycling water, nonferrous metal main salt solution and extracting nonferrous metal in the water washing tank is characterized by comprising the following steps of:
s1, preparing a workpiece, and placing the workpiece into an electroplating mother tank;
s2, establishing a nonferrous metal main salt solution and water recycling part of a single-point recovery tank, wherein the nonferrous metal main salt solution and water recycling part of the single-point recovery tank comprises a recovery tank, a pretreatment filtering and separation module;
s3, recycling the nonferrous metal main salt solution in the electroplating mother tank through the recycling tank, and preprocessing and filtering the nonferrous metal main salt solution in the single-point recycling tank and the nonferrous metal main salt solution in the water recycling part;
s4, conveying the filtered nonferrous metal main salt solution to a separation membrane group for separation to obtain reuse water and high-concentration nonferrous metal main salt concentrated solution;
s5, conveying the recycled water obtained after separation into the recovery tank, and conveying the high-concentration nonferrous metal main salt concentrated solution obtained after separation into an electroplating main tank for use;
s6, selecting whether water is added into the recovery tank according to the water level in the recovery tank.
2. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 1, wherein the process is characterized in that: the electroplating mother tank comprises nickel preplating, watt nickel, semi-bright nickel, bright nickel and pearl nickel, and the separation module is only used for concentrating and separating nonferrous metal main salt with high added value.
3. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 1, wherein the process is characterized in that: the auxiliary additive used at the separation membrane group is not concentrated through the membrane, the physicochemical properties of the raw materials are not changed, and the concentration of the high-concentration nonferrous metal main salt concentrated solution is between 150 and 250 g/L.
4. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 1, wherein the process is characterized in that: the water is added to the recovery tank in an amount of 0-5% and the recovery efficiency of the high-concentration nonferrous metal main salt concentrate separated at the separation module is 95-100%.
5. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 1, wherein the process is characterized in that: after the nonferrous metal main salt solution and the water recycling part of the single-point position recycling tank are established, the mixed water recycling of all the recycling tank and the water washing tank and the nonferrous metal resource part are established, wherein the mixed water recycling of all the recycling tank and the water washing tank and the nonferrous metal resource part comprises a flowing water washing tank I, a flowing water washing tank II, a pretreatment filter tank, a separation membrane group, a nickel electrodeposition system, a recycling pure water tank, a sewage treatment system and a sewage pipe network.
6. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 5, wherein the process is characterized in that: the nickel electrowinning system in the mixed water recycling and non-ferrous metal resource extracting part of all the recovery tanks and the water washing tank is connected with the non-ferrous metal main salt solution of the single-point recovery tank and the separation membrane group in the water recycling part, and the non-ferrous metal main salt concentrated solution filtered by the separation membrane group in the non-ferrous metal main salt solution of the single-point recovery tank and the water recycling part is discharged into the nickel electrowinning system in the mixed water recycling and non-ferrous metal resource extracting part of all the recovery tanks and the water washing tank when the electroplating mother tank is abnormal.
7. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 5, wherein the process is characterized in that: the conductivity of the recycled pure water in the recycled pure water tank is below 5us/cm, and the purity of the nonferrous metal deposited in the nickel electrowinning system is above 99%.
8. The process for recovering water, nonferrous metal main salt solution and extracting nonferrous metal from a water washing tank according to claim 5, wherein the process is characterized in that: the concentration of nonferrous metal main salt contained in the wastewater generated by the electrowinning in the nickel electrowinning system is below 0.1g/L, and the wastewater is discharged from the nickel electrowinning system to a sewage treatment system for reaching the treatment standard and then discharged into a sewage pipe network.
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