Treatment device and treatment process for efficiently recovering nickel and phosphorus from nickel plating waste liquid

Abstract

The treatment device comprises a treatment assembly, a nickel recovery assembly, an adding assembly and a phosphorus recovery assembly, the nickel recovery assembly is arranged on the periphery of the treatment assembly, the adding assembly is arranged on the periphery of the nickel recovery assembly, and the phosphorus recovery assembly is arranged on the periphery of the nickel recovery assembly. The phosphorus recovery assembly is arranged on the periphery of the nickel recovery assembly, the nickel recovery assembly comprises a rectifier, a catholyte circulation bin, an anolyte circulation bin, a second pump body, two first PH detection probes, two first wireless transmitters, an electrolysis bin, a cathode plate, an anode film frame, an anode plate, a third pump body, a fourth pump body and a fifth pump body, and the rectifier is arranged on the periphery of the treatment assembly. The treatment device for efficiently recovering nickel and phosphorus from the nickel plating waste liquid and the treatment process thereof provided by the invention have the advantages that the transportation and emission risks in the outward transportation treatment process of the nickel-containing waste liquid are reduced, nickel and phosphorus resources are recovered, the treatment cost of the waste liquid is reduced, and meanwhile, the pollution to the environment and the damage to the ecology are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electroplating, and in particular to a treatment device and a treatment process for efficiently recovering nickel and phosphorus from nickel plating waste liquid. Background Art

[0002] Nickel-gold immersion is a surface treatment process widely used in the circuit board industry. This process first chemically plates a layer of nickel on the copper surface of the circuit board, and then immerses a layer of gold on the nickel. There are a large number of organic substances such as nickel ions, sodium phosphite, sodium hypophosphite, pH buffers and stabilizers in the chemical nickel plating waste liquid. When the chemical nickel plating solution ages and becomes chemical nickel plating waste liquid, the waste liquid still contains up to 2000~5000mg / L of nickel, 80000~200000mg / L of phosphorus and high concentrations of COD and ammonia nitrogen, which are the main sources of nickel and phosphorus pollution in circuit board companies. It has been confirmed that heavy metal nickel has carcinogenic and sensitizing effects, which can cause skin cancer, lung cancer and nasal cancer, etc. Various soluble nickel compounds also have obvious toxic effects on organisms in the environment. The "Electroplating Pollutant Emission Standard" lists heavy metal nickel and its compounds as a type of pollutant, which needs to be controlled first. The wastewater after nickel plating will contain nickel and phosphorus. Nickel is a relatively expensive metal resource, and phosphorus is well-known as one of the main pollution factors causing eutrophication of water bodies.

[0003] However, in the prior art, when discharging nickel plating wastewater, the pH value of the wastewater is mostly adjusted, and the wastewater is treated and discharged after the adjustment. There is a lack of recovery of nickel and phosphorus in the nickel plating wastewater, and more reagents need to be added when adjusting the pH value of the wastewater, which easily causes waste and makes the composition of the wastewater more complicated, affecting the subsequent wastewater evolution treatment. Summary of the invention The purpose of the present invention is to provide a treatment device and a treatment process for efficiently recovering nickel and phosphorus from nickel plating waste liquid, which has the advantages of reducing the transportation and discharge risks in the process of external treatment of nickel-containing waste liquid, recovering nickel and phosphorus resources, reducing the treatment cost of waste liquid, and reducing pollution to the environment and damage to the ecology, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a treatment device and a treatment process for efficiently recovering nickel and phosphorus from nickel plating waste liquid, comprising a treatment component, a nickel recovery component, an addition component and a phosphorus recovery component, wherein the nickel recovery component is arranged on the periphery of the treatment component, the addition component is arranged on the periphery of the nickel recovery component, and the phosphorus recovery component is arranged on the periphery of the nickel recovery component.

[0005] Furthermore, the nickel recovery component includes a rectifier, a cathode liquid circulation bin, an anode liquid circulation bin, a pump body 2, two pH detection probes 1, two wireless transmitters 1, an electrolysis bin, a cathode plate, an anode membrane frame, an anode plate, a pump body 3, a pump body 4 and a pump body 5. The rectifier is arranged on the periphery of the processing component, the cathode liquid circulation bin is fixedly installed at the bottom of the rectifier, the anode liquid circulation bin is fixedly installed at the bottom of the rectifier, the pump body 2 is fixedly installed on one side outer wall of the cathode liquid circulation bin through a connecting pipe, and the two pH detection probes 1 are respectively fixedly installed on the cathode liquid circulation bin and the anode membrane frame. On the liquid circulation tank, the two wireless transmitters are respectively fixedly installed on the top of the two PH detection probes, the electrolysis tank is fixedly installed on the bottom of the rectifier, the cathode plates are evenly distributed in the electrolysis tank, the anode membrane frames are evenly distributed in the electrolysis tank, the anode plates are fixedly installed on the inner wall of the anode membrane frame, the pump body three is fixedly installed on the anode liquid circulation tank and the electrolysis tank through a connecting pipe, the pump body four is fixedly installed on the anode liquid circulation tank through a connecting pipe, the pump body five is fixedly installed on the cathode liquid circulation tank and the electrolysis tank through a connecting pipe, and the rectifier is electrically connected to the cathode plate and the anode plate.

[0006] Further, the processing component includes a waste liquid storage tank, a pump body, a low-temperature evaporator, a concentrated liquid collection tank, an anode liquid storage tank, three nickel adsorption resin tanks, a sulfuric acid tank, an alkali liquid tank and an electromagnetic valve. The pump body is fixedly installed on the waste liquid storage tank through a connecting pipe, the low-temperature evaporator is fixedly installed on the pump body through a connecting pipe, the concentrated liquid collection tank is arranged on the periphery of the waste liquid storage tank, the anode liquid storage tank is fixedly installed on the pump body through a connecting pipe, the three nickel adsorption resin tanks are all arranged on the periphery of the anode liquid storage tank, the three nickel adsorption resin tanks are interconnected through a connecting pipe, the corresponding nickel adsorption resin tanks are fixedly connected to the anode liquid storage tank through a connecting pipe, the sulfuric acid tank is fixedly installed on the nickel adsorption resin tank through a connecting pipe, the alkali liquid tank is fixedly installed on the nickel adsorption resin tank through a connecting pipe, the nickel adsorption resin tank, the sulfuric acid tank and the alkali liquid tank are fixedly connected to the pump body through a connecting pipe, and the electromagnetic valve is arranged between the alkali liquid tank and the nickel adsorption resin tank.

[0007] Furthermore, a condenser pipe is fixedly mounted on the low-temperature evaporator, and the low-temperature evaporator is fixedly connected to the concentrated liquid collecting tank via a connecting pipe.

[0008] Furthermore, the added component includes a base, three fixed boxes, three four-way pipes, three solenoid valves 2, a rectangular plate and a storage bin, the base is arranged on the periphery of the rectifier, the three fixed boxes are fixedly installed on the top of the base, the three four-way pipes are respectively fixedly installed in the three fixed boxes, the three solenoid valves 2 are respectively fixedly installed on the three four-way pipes, the rectangular plates are evenly distributed in the three fixed boxes, the storage bin is fixedly installed on the top of the rectangular plate, the storage bin is fixedly connected to the four-way pipe, and the corresponding two four-way pipes are respectively fixedly connected to the cathode liquid circulation bin and the anode liquid circulation bin.

[0009] Furthermore, the phosphorus recovery component includes a reaction component and a filtering component, the filtering component is fixedly installed on the reaction component, the reaction component includes a reactor, a second PH detection probe, a second wireless transmitter, a motor and a stirring rod, the reactor is fixedly connected to a third pump body through a connecting pipe, the second PH detection probe is fixedly installed on the reactor, the second wireless transmitter is fixedly installed on the top of the second PH detection probe, the motor is fixedly installed on the top of the reactor, the stirring rod is rotatably installed on the reactor, and the motor is fixedly connected to the top of the stirring rod.

[0010] Furthermore, the filter assembly includes a filter press and a third solenoid valve, the filter press is arranged on the periphery of the reactor, and the third solenoid valve is fixedly installed on the filter press and fixedly connected to the reactor through a connecting pipe.

[0011] Furthermore, the reactor is fixedly connected to the corresponding four-way pipe through a connecting pipe.

[0012] The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid are characterized by comprising the following steps: S1, liquid concentration, the chemical nickel plating aging waste liquid and the resin regeneration nickel-containing waste liquid are poured into the waste liquid storage tank, an appropriate amount of defoaming agent is added to the waste liquid storage tank and the pump body is started, the waste liquid in the waste liquid storage tank is pumped into the low-temperature evaporator for reduced pressure evaporation, the low-temperature evaporator concentrates the waste liquid to evaporate excess water, the concentrated liquid is discharged into the concentrated liquid collection tank nickel through the low-temperature evaporator, and the condensed water is discharged through the condenser. The reduction and concentration of the waste liquid are completed in this stage.

[0013] S2, electrolysis, start pump body 2, pump body 2 pumps out the concentrated liquid in the concentrated liquid collection tank and injects it into the cathode liquid circulation bin, start solenoid valve 2 to open the storage bin, add NaOH to the cathode liquid circulation bin through the four-way pipe, so that the pH value of the concentrated liquid is adjusted to 7-9, and the concentrated liquid is preliminarily heated to 35-40°C through an external heating device, start pump body 5, pump the concentrated liquid into the electrolytic cell, turn on the rectifier to energize the cathode plate and the anode plate, so that the cathode plate, the anode plate and the concentrated liquid form a loop and electrolysis is carried out to precipitate nickel metal on the cathode plate.

[0014] S3. Adjust the discharge, pump the waste liquid into the nickel adsorption resin tank, reduce it to below 0.5ppm after 2~3 levels of nickel ion chelating resin adsorption, and discharge it into the nickel anode liquid storage tank. When the primary resin is nearly saturated or the nickel-containing waste water is higher than 0.5ppm, regenerate the first-level resin tank, and convert the secondary resin tank into the primary resin tank for use. The regenerated acid and alkali are prepared in the alkali liquid tank and the sulfuric acid tank. After the nickel ion accumulation in the acid liquid tank reaches 10~20g / L, it is pumped into the waste liquid storage tank for treatment, and the waste liquid in the alkali liquid tank is discharged into the wastewater station for treatment.

[0015] S4, second magnetic electrolysis, start pump body four, pump the waste liquid in the anode liquid storage bin into the anode liquid circulation bin, start solenoid valve two to open the storage bin, the storage bin adds hydrogen peroxide, sodium chloride and the like to the anode liquid circulation bin through a four-way pipe to adjust the electrolyte composition and pH value, the waste liquid in the adjusted anode liquid circulation bin is pumped into the electrolysis bin through pump body five and circulated electrolyzed in the anode membrane frame and anode plate, the electrolysis is stopped when the hypophosphite is oxidized by more than 95% during the circulating electrolysis process, and the waste liquid is pumped from the electrolysis bin into the anode liquid circulation bin through pump body three.

[0016] S5, filtration and recovery, the waste liquid in the anode liquid circulation bin is pumped into the reactor through pump body three, and reagents such as calcium chloride, ferric sulfate, polyacrylamide, etc. are added to the reactor through the storage bin box. The motor is started, and the motor drives the stirring rod to rotate to stir, precipitate and flocculate the waste liquid. The solenoid valve three is started to open the reactor, and the reactor pours the waste liquid into the filter press. The filter press dehydrates the waste liquid. The recovered phosphate precipitate can be used as fertilizer, and the filtrate is discharged into the external wastewater pool.

[0017] In summary, due to the adoption of the above technology, the beneficial effects of the present invention are: The present invention arranges a nickel recovery component, starts pump body 2, pump body 2 pumps out concentrated liquid in a concentrated liquid collection tank and injects it into a cathode liquid circulation bin, starts electromagnetic valve 2 to open a storage bin, and the storage bin adds NaOH to the cathode liquid circulation bin through a four-way pipe, so that the pH value of the concentrated liquid is adjusted to 7-9, and the concentrated liquid is preliminarily heated to 35-40° C. through an external heating device, starts pump body 5, pumps the concentrated liquid into an electrolytic cell, turns on a rectifier to energize a cathode plate and an anode plate, so that the cathode plate, the anode plate and the concentrated liquid form a loop and perform electrolysis, and nickel metal is precipitated on the cathode plate and recovered. The present invention has the advantages of reducing the transportation and discharge risks in the process of external transportation of nickel-containing waste liquid, reducing the treatment cost of the waste liquid, and reducing pollution to the environment and ecological damage.

[0018] The present invention arranges a phosphorus recovery component, and waste liquid in the anode liquid circulation bin is pumped into the reactor through pump body three, and reagents such as calcium chloride, ferric sulfate, polyacrylamide, etc. are added into the reactor through the storage bin box, and a motor is started, and the motor drives a stirring rod to rotate to stir, precipitate and flocculate the waste liquid, and electromagnetic valve three is started to open the reactor, and the reactor pours the waste liquid into a filter press, and the filter press dehydrates the waste liquid, and the recovered phosphate precipitate can be used as a fertilizer, and the filtrate is discharged into an external wastewater pool, which has the advantages of stirring and flocculating the waste liquid and recovering phosphorus by filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of the working process structure of a device for efficiently recovering nickel and phosphorus from nickel plating waste liquid and its processing process; Figure 2 It is a schematic cross-sectional structural diagram of the nickel recovery component in the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the added components in the present invention; Figure 4 is a schematic cross-sectional structural diagram of a phosphorus recovery assembly in the present invention; Figure 5 It is a schematic diagram of the assembly structure of the pressure filter and the solenoid valve three in the present invention; Figure 6 The invention discloses a processing device for efficiently recovering nickel and phosphorus from nickel plating waste liquid and a principle framework of the processing technology thereof.

[0020] In the figure: 1. Processing component; 101. Waste liquid storage tank; 102. Pump body 1; 103. Low temperature evaporator; 104. Concentrate collection tank; 105. Anode liquid storage tank; 106. Nickel adsorption resin tank; 107. Sulfuric acid tank; 108. Alkaline liquid tank; 109. Solenoid valve 1; 2. Nickel recovery component; 201. Rectifier; 202. Cathode liquid circulation tank; 203. Anode liquid circulation tank; 204. Pump body 2; 205. PH detection probe 1; 206. Wireless transmitter 1; 207. Electrolysis tank; 2 08, cathode plate; 209, anode membrane frame; 210, anode plate; 211, pump body three; 212, pump body four; 213, pump body five; 3, additional components; 301, base; 302, fixed box; 303, four-way pipe; 304, solenoid valve two; 305, rectangular plate; 306, storage bin; 4, phosphorus recovery component; 401, reactor; 402, PH detection probe two; 403, wireless transmitter two; 404, motor; 405, stirring rod; 406, filter press; 407, solenoid valve three. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] The present invention provides Figure 1-Figure 6 As shown, a processing device and a processing process for efficiently recovering nickel and phosphorus from nickel plating waste liquid, comprising a processing component 1, a nickel recovery component 2, an addition component 3 and a phosphorus recovery component 4, wherein the nickel recovery component 2 is arranged at the periphery of the processing component 1, the addition component 3 is arranged at the periphery of the nickel recovery component 2, and the phosphorus recovery component 4 is arranged at the periphery of the nickel recovery component 2. In addition, the nickel recovery component 2 includes a rectifier 201, a cathode liquid circulation bin 202, an anode liquid circulation bin 203, a pump body 204, two pH detection probes 205, two wireless transmitters 206, an electrolysis bin 207, a cathode plate 208, an anode membrane frame 209, an anode plate 210, a pump body 3 211, a pump body 4 212 and a pump body 5 213. The rectifier 201 is arranged at the periphery of the processing component 1, the cathode liquid circulation bin 202 is fixedly installed at the bottom of the rectifier 201, the anode liquid circulation bin 203 is fixedly installed at the bottom of the rectifier 201, and the pump body 204 is connected to the cathode liquid circulation bin 202 by a plurality of channels. The connecting pipe is fixedly installed on one side outer wall of the cathode liquid circulation chamber 202, the two PH detection probes 205 are respectively fixedly installed on the cathode liquid circulation chamber 202 and the anode liquid circulation chamber 203, the two wireless transmitters 206 are respectively fixedly installed on the top of the two PH detection probes 205, the electrolysis chamber 207 is fixedly installed on the bottom of the rectifier 201, the cathode plates 208 are evenly distributed in the electrolysis chamber 207, the anode membrane frames 209 are evenly distributed in the electrolysis chamber 207, the anode plates 210 are fixedly installed on the inner wall of the anode membrane frame 209, and the pump body 211 is fixedly installed on the inner wall of the anode membrane frame 209. The connecting pipe is fixedly installed on the anode liquid circulation bin 203 and the electrolysis bin 207, the pump body 212 is fixedly installed on the anode liquid circulation bin 203 through the connecting pipe, the pump body 5 213 is fixedly installed on the cathode liquid circulation bin 202 and the electrolysis bin 207 through the connecting pipe, the rectifier 201 is electrically connected to the cathode plate 208 and the anode plate 210, more specifically, start the pump body 204, the pump body 204 pumps out the concentrated liquid in the concentrated liquid collection tank 104 and injects it into the cathode liquid circulation bin 202, start the solenoid valve 204 to open the storage bin 306, the storage bin 306 is connected to the cathode liquid circulation bin 202 through the four-way pipe 303 NaOH is added to the cathode liquid circulation bin 202 to adjust the pH value of the concentrated solution to 7-9, and the concentrated solution is preliminarily heated to 35-40°C by an external heating device, and the pump body 5 213 is started to pump the concentrated solution into the electrolytic cell 5, and the rectifier 201 is turned on to energize the cathode plate 208 and the anode plate 210, so that the cathode plate 208, the anode plate 210 and the concentrated solution form a loop and perform electrolysis, and nickel metal is precipitated on the cathode plate 208 and recovered, which has the advantages of reducing the transportation and discharge risks of nickel-containing waste liquid during the external treatment process, reducing the waste liquid treatment cost, and reducing environmental pollution and ecological damage.

[0023] like Figure 1As shown, the processing component 1 includes a waste liquid storage tank 101, a pump body 102, a low-temperature evaporator 103, a concentrated liquid collection tank 104, an anolyte storage tank 105, three nickel adsorption resin tanks 106, a sulfuric acid warehouse 107, an alkali liquid warehouse 108 and a solenoid valve 109, the pump body 102 is fixedly installed on the waste liquid storage tank 101 through a connecting pipe, the low-temperature evaporator 103 is fixedly installed on the pump body 102 through a connecting pipe, the concentrated liquid collection tank 104 is arranged on the periphery of the waste liquid storage tank 101, the anolyte storage tank 105 is fixedly installed on the pump body 212 through a connecting pipe, the three nickel adsorption resin tanks 106 are all arranged on the periphery of the anolyte storage tank 105, the three nickel adsorption resin tanks 106 are interconnected through connecting pipes, the corresponding nickel adsorption resin tanks 106 are fixedly connected to the anolyte storage tank 105 through connecting pipes, and the sulfuric acid warehouse 10 7 is fixedly installed on the nickel adsorption resin tank 106 through a connecting pipe, the alkali liquid tank 108 is fixedly installed on the nickel adsorption resin tank 106 through a connecting pipe, the nickel adsorption resin tank 106, the sulfuric acid tank 107 and the alkali liquid tank 108 are fixedly connected to the pump body 5 213 through a connecting pipe, and the solenoid valve 109 is arranged between the alkali liquid tank 108 and the nickel adsorption resin tank 106. More specifically, the chemical nickel plating aging waste liquid and the resin regeneration nickel-containing waste liquid are concentrated and poured into the waste liquid storage tank 101, an appropriate amount of defoaming agent is added to the waste liquid storage tank 101 and the pump body 102 is started, the waste liquid in the waste liquid storage tank 101 is pumped into the low-temperature evaporator 103 for reduced pressure evaporation, the low-temperature evaporator 103 concentrates the waste liquid to evaporate excess water, the concentrate is discharged into the concentrate collection tank 104 nickel through the low-temperature evaporator 103, and the condensed water is discharged through the condenser, which has the advantages of concentrating the waste liquid and reducing the volume of the waste liquid.

[0024] In addition, a condenser pipe is fixedly installed on the low-temperature evaporator 103, and the low-temperature evaporator 103 is fixedly connected to the concentrated liquid collection tank 104 through a connecting pipe.

[0025] like Figure 1 As shown, in some embodiments, the added component 3 includes a base 301, three fixed boxes 302, three four-way pipes 303, three solenoid valves 2 304, a rectangular plate 305 and a storage bin 306, the base 301 is arranged on the periphery of the rectifier 201, the three fixed boxes 302 are fixedly installed on the top of the base 301, the three four-way pipes 303 are respectively fixedly installed in the three fixed boxes 302, the three solenoid valves 2 304 are respectively fixedly installed on the three four-way pipes 303, the rectangular plates 305 are evenly distributed in the three fixed boxes 302, the storage bin 306 is fixedly installed on the top of the rectangular plate 305, the storage bin 306 is fixedly connected to the four-way pipe 303, and the corresponding two four-way pipes 303 are respectively fixedly connected to the cathode liquid circulation bin 202 and the anode liquid circulation bin 203.

[0026] like Figure 1 As shown, in some embodiments, the phosphorus recovery component 4 includes a reaction component and a filtering component, the filtering component is fixedly installed on the reaction component, the reaction component includes a reactor 401, a PH detection probe 2 402, a wireless transmitter 2 403, a motor 404 and a stirring rod 405, the reactor 401 is fixedly connected to the pump body 3 211 through a connecting pipe, the PH detection probe 2 402 is fixedly installed on the reactor 401, the wireless transmitter 2 403 is fixedly installed on the top of the PH detection probe 2 402, the motor 404 is fixedly installed on the top of the reactor 401, the stirring rod 405 is rotatably installed on the reactor 401, and the motor The motor 404 is fixedly connected to the top of the stirring rod 405. More specifically, the waste liquid in the anode liquid circulation bin 203 is pumped into the reactor 401 through the pump body three 211, and reagents such as calcium chloride, ferric sulfate, and polyacrylamide are added to the reactor 401 through the storage bin 306. The motor 404 is started, and the motor 404 drives the stirring rod 405 to rotate to stir, precipitate, and flocculate the waste liquid. The solenoid valve three 407 is started to open the reactor 401. The reactor 401 pours the waste liquid into the filter press 406, and the filter press 406 dehydrates the waste liquid. The recovered phosphate precipitate can be used as a fertilizer, and the filtrate is discharged into the external wastewater pool. It has the advantages of stirring and flocculating the waste liquid and recovering phosphorus by filtering.

[0027] In addition, the filtering assembly includes a filter press 406 and a solenoid valve 407. The filter press 406 is arranged on the periphery of the reactor 401. The solenoid valve 407 is fixedly installed on the filter press 406 and is fixedly connected to the reactor 401 through a connecting pipe.

[0028] In some embodiments, the reactor 401 is fixedly connected to the corresponding cross-way pipe 303 via a connecting pipe.

[0029] A treatment device and a treatment process for efficiently recovering nickel and phosphorus from nickel plating waste liquid include the following steps: S1, liquid concentration, the chemical nickel plating aging waste liquid and the resin regeneration nickel-containing waste liquid are poured into the waste liquid storage tank 101, an appropriate amount of defoaming agent is added to the waste liquid storage tank 101 and the pump body 102 is started, the waste liquid in the waste liquid storage tank 101 is pumped into the low-temperature evaporator 103 for reduced pressure evaporation, the low-temperature evaporator 103 concentrates the waste liquid to evaporate excess water, the concentrated liquid is discharged into the concentrated liquid collection tank 104 nickel through the low-temperature evaporator 103, and the condensed water is discharged through the condenser. The reduction and concentration of the waste liquid are completed in this stage.

[0030] S2, electrolysis, start pump body 204, pump body 204 pumps out the concentrated liquid in the concentrated liquid collection tank 104 and injects it into the cathode liquid circulation bin 202, start solenoid valve 204 to open the storage bin 306, storage bin 306 adds NaOH to the cathode liquid circulation bin 202 through the four-way pipe 303, so that the pH value of the concentrated liquid is adjusted to 7-9, and the concentrated liquid is preliminarily heated to 35-40°C through an external heating device, start pump body 5 213, pump the concentrated liquid into the electrolytic cell 5, turn on the rectifier 201 to energize the cathode plate 208 and the anode plate 210, so that the cathode plate 208, the anode plate 210 and the concentrated liquid form a loop and perform electrolysis, and nickel metal is precipitated on the cathode plate 208.

[0031] S3, adjust the discharge, pump the waste liquid into the nickel adsorption resin tank 106, reduce it to below 0.5ppm after 2~3 levels of nickel ion chelating resin adsorption, and discharge it into the anode liquid storage tank 105 nickel, when the primary resin is nearly saturated or the nickel-containing waste water is higher than 0.5ppm, regenerate the first-level resin tank, and convert the secondary resin tank into the primary resin tank for use. The regenerated acid and alkali are prepared in the alkali liquid tank 108 and the sulfuric acid tank 107. After the nickel ion accumulation in the acid liquid tank reaches 10~20g / L, it is pumped into the waste liquid storage tank 101 for treatment, and the waste liquid in the alkali liquid tank is discharged into the wastewater station for treatment.

[0032] S4, second magnetic electrolysis, start pump body four 212, pump the waste liquid in the anode liquid storage bin 105 into the anode liquid circulation bin 203, start solenoid valve two 304 to open the storage bin 306, the storage bin 306 adds hydrogen peroxide, sodium chloride and the like to the anode liquid circulation bin 203 through the four-way pipe 303 to adjust the electrolyte composition and pH value, the waste liquid in the adjusted anode liquid circulation bin 203 is pumped into the electrolysis bin 207 through pump body five 213, and is circulated and electrolyzed in the anode membrane frame 209 and the anode plate 210, and the electrolysis is stopped when the hypophosphite is oxidized by more than 95% during the circulation electrolysis process, and the waste liquid is pumped from the electrolysis bin 207 into the anode liquid circulation bin 203 through pump body three 211.

[0033] S5, filtering and recycling, the waste liquid in the anode liquid circulation bin 203 is pumped into the reactor 401 through the pump body three 211, and reagents such as calcium chloride, ferric sulfate, polyacrylamide, etc. are added into the reactor 401 through the storage bin 306 box, and the motor 404 is started. The motor 404 drives the stirring rod 405 to rotate to stir, precipitate and flocculate the waste liquid, and the solenoid valve three 407 is started to open the reactor 401. The reactor 401 pours the waste liquid into the filter press 406, and the filter press 406 dehydrates the waste liquid. The recovered phosphate precipitate can be used as a fertilizer, and the filtrate is discharged into the external wastewater pool.

[0034] Working principle: Step 1: Concentrate the waste liquid. Pour the chemical nickel plating aging waste liquid and the resin regeneration nickel-containing waste liquid into the waste liquid storage tank 101. Add an appropriate amount of defoaming agent into the waste liquid storage tank 101 and start the pump body 102. Pump the waste liquid in the waste liquid storage tank 101 into the low-temperature evaporator 103 for reduced-pressure evaporation. The low-temperature evaporator 103 concentrates the waste liquid to evaporate excess water. The concentrated liquid is discharged into the concentrated liquid collection tank 104 through the low-temperature evaporator 103. The condensed water is discharged through the condenser to reduce and concentrate the waste liquid.

[0035] Step 2: Electrolytic precipitation, start pump body 204, pump body 204 pumps out the concentrated liquid in the concentrated liquid collection tank 104 and injects it into the cathode liquid circulation bin 202, start solenoid valve 204 to open the storage bin 306, storage bin 306 adds NaOH to the cathode liquid circulation bin 202 through the four-way pipe 303, so that the pH value of the concentrated liquid is adjusted to 7~9, and the concentrated liquid is preliminarily heated to 35~40℃ through an external heating device, start pump body 5 213, pump the concentrated liquid into the electrolytic cell 5, turn on the rectifier 201 to energize the cathode plate 208 and the anode plate 210, so that the cathode plate 208, the anode plate 210 and the concentrated liquid form a loop and perform electrolysis, and nickel metal is precipitated on the cathode plate 208.

[0036] Step three: secondary electrolysis, start pump body four 212, pump the waste liquid in the anode liquid storage bin 105 into the anode liquid circulation bin 203, start solenoid valve two 304 to open the storage bin 306, and the storage bin 306 adds hydrogen peroxide, sodium chloride, etc. to the anode liquid circulation bin 203 through the four-way pipe 303 to adjust the electrolyte composition and pH value. The adjusted waste liquid in the anode liquid circulation bin 203 is pumped into the electrolysis bin 207 through pump body five 213 and circulated electrolyzed in the anode membrane frame 209 and the anode plate 210. During the circulatory electrolysis, the electrolysis is stopped when the hypophosphite is oxidized by more than 95%, and the waste liquid is pumped from the electrolysis bin 207 into the anode liquid circulation bin 203 through pump body three 211.

[0037] Step 4: Filtration and recovery. The waste liquid in the anode liquid circulation bin 203 is pumped into the reactor 401 through the pump body three 211. Calcium chloride, ferric sulfate, polyacrylamide and other reagents are added to the reactor 401 through the storage bin 306. The motor 404 is started. The motor 404 drives the stirring rod 405 to rotate to stir, precipitate and flocculate the waste liquid. The solenoid valve three 407 is started to open the reactor 401. The reactor 401 pours the waste liquid into the filter press 406. The filter press 406 dehydrates the waste liquid. The recovered phosphate precipitate can be used as a fertilizer, and the filtrate is discharged into the external wastewater pool.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid, characterized in that: It comprises a processing component, a nickel recovery component, an addition component and a phosphorus recovery component. The nickel recovery component is arranged on the periphery of the processing component, the addition component is arranged on the periphery of the nickel recovery component, and the phosphorus recovery component is arranged on the periphery of the nickel recovery component.

2. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 1, characterized in that: The nickel recovery component includes a rectifier, a cathode liquid circulation bin, an anode liquid circulation bin, a pump body 2, two PH detection probes 1, two wireless transmitters 1, an electrolysis bin, a cathode plate, an anode membrane frame, an anode plate, a pump body 3, a pump body 4 and a pump body 5. The rectifier is arranged on the periphery of the processing component, the cathode liquid circulation bin is fixedly installed at the bottom of the rectifier, the anode liquid circulation bin is fixedly installed at the bottom of the rectifier, the pump body 2 is fixedly installed on one side outer wall of the cathode liquid circulation bin through a connecting pipe, and the two PH detection probes 1 are respectively fixedly installed on the cathode liquid circulation bin and the anode liquid circulation bin. The two wireless transmitters are respectively fixedly mounted on the tops of the two PH detection probes, the electrolysis chamber is fixedly mounted on the bottom of the rectifier, the cathode plates are evenly distributed in the electrolysis chamber, the anode membrane frames are evenly distributed in the electrolysis chamber, the anode plates are fixedly mounted on the inner walls of the anode membrane frames, the pump body three is fixedly mounted on the anode liquid circulation chamber and the electrolysis chamber through a connecting pipe, the pump body four is fixedly mounted on the anode liquid circulation chamber through a connecting pipe, the pump body five is fixedly mounted on the cathode liquid circulation chamber and the electrolysis chamber through a connecting pipe, and the rectifier is electrically connected to the cathode plates and the anode plates.

3. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 2, characterized in that: The processing component includes a waste liquid storage tank, a pump body, a low-temperature evaporator, a concentrated liquid collection tank, an anolyte storage tank, three nickel adsorption resin tanks, a sulfuric acid bin, an alkali liquid bin and a solenoid valve. The pump body is fixedly installed on the waste liquid storage tank through a connecting pipe, the low-temperature evaporator is fixedly installed on the pump body through a connecting pipe, the concentrated liquid collection tank is arranged on the periphery of the waste liquid storage tank, the anolyte storage tank is fixedly installed on the pump body through a connecting pipe, the three nickel adsorption resin tanks are all arranged on the periphery of the anolyte storage tank, the three nickel adsorption resin tanks are interconnected through a connecting pipe, the corresponding nickel adsorption resin tanks are fixedly connected to the anolyte storage tank through a connecting pipe, the sulfuric acid bin is fixedly installed on the nickel adsorption resin tank through a connecting pipe, the alkali liquid bin is fixedly installed on the nickel adsorption resin tank through a connecting pipe, the nickel adsorption resin tank, the sulfuric acid bin and the alkali liquid bin are fixedly connected to the pump body through a connecting pipe, and the solenoid valve is arranged between the alkali liquid bin and the nickel adsorption resin tank.

4. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 3, characterized in that: A condenser pipe is fixedly mounted on the low-temperature evaporator, and the low-temperature evaporator is fixedly connected to a concentrated liquid collecting tank via a connecting pipe.

5. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 2, characterized in that: The added components include a base, three fixed boxes, three four-way pipes, three solenoid valves 2, a rectangular plate and a storage bin. The base is arranged on the periphery of the rectifier, the three fixed boxes are fixedly installed on the top of the base, the three four-way pipes are respectively fixedly installed in the three fixed boxes, the three solenoid valves 2 are respectively fixedly installed on the three four-way pipes, the rectangular plates are evenly distributed in the three fixed boxes, the storage bin is fixedly installed on the top of the rectangular plate, the storage bin is fixedly connected to the four-way pipe, and the corresponding two four-way pipes are respectively fixedly connected to the cathode liquid circulation bin and the anode liquid circulation bin.

6. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 5, characterized in that: The phosphorus recovery component includes a reaction component and a filter component, the filter component is fixedly installed on the reaction component, the reaction component includes a reactor, a second PH detection probe, a second wireless transmitter, a motor and a stirring rod, the reactor is fixedly connected to a third pump body through a connecting pipe, the second PH detection probe is fixedly installed on the reactor, the second wireless transmitter is fixedly installed on the top of the second PH detection probe, the motor is fixedly installed on the top of the reactor, the stirring rod is rotatably installed on the reactor, and the motor is fixedly connected to the top of the stirring rod.

7. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 6, characterized in that: The filter assembly includes a filter press and a third solenoid valve. The filter press is arranged on the periphery of the reactor. The third solenoid valve is fixedly installed on the filter press and is fixedly connected to the reactor through a connecting pipe.

8. The device and process for efficiently recovering nickel and phosphorus from nickel plating waste liquid according to claim 6, characterized in that: The reactor is fixedly connected to the corresponding four-way pipe through a connecting pipe.

9. The device and process for efficiently recovering nickel and phosphorus from nickel plating wastewater according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, liquid concentration, the chemical nickel plating aging waste liquid and the resin regeneration nickel-containing waste liquid are concentrated into the waste liquid storage tank, an appropriate amount of defoaming agent is added to the waste liquid storage tank and the pump body is started, the waste liquid in the waste liquid storage tank is pumped into the low-temperature evaporator for reduced pressure evaporation, the low-temperature evaporator concentrates the waste liquid to evaporate excess water, the concentrated liquid is discharged into the concentrated liquid collection tank nickel through the low-temperature evaporator, and the condensed water is discharged through the condenser tube. The reduction and concentration of the waste liquid are completed in this stage; S2, electrolysis, start pump body 2, pump body 2 pumps out the concentrated liquid in the concentrated liquid collection tank and injects it into the cathode liquid circulation bin, start solenoid valve 2 to open the storage bin, the storage bin adds NaOH to the cathode liquid circulation bin through the four-way pipe, so that the pH value of the concentrated liquid is adjusted to 7-9, and the concentrated liquid is preliminarily heated to 35-40° C. through an external heating device, start pump body 5, pump the concentrated liquid into the electrolytic cell, turn on the rectifier to energize the cathode plate and the anode plate, so that the cathode plate, the anode plate and the concentrated liquid form a loop and perform electrolysis, and nickel metal is precipitated on the cathode plate; S3, adjust the discharge, pump the waste liquid into the nickel adsorption resin tank, reduce it to below 0.5ppm after 2~3 levels of nickel ion chelating resin adsorption, and discharge it into the nickel anode liquid storage tank. When the primary resin is nearly saturated or the nickel-containing waste water is higher than 0.5ppm, regenerate the first-level resin tank, and convert the secondary resin tank to the primary resin tank for use. The regenerated acid and alkali are prepared in the alkali tank and the sulfuric acid tank. After the nickel ion accumulation in the acid tank reaches 10~20g / L, it is pumped into the waste liquid storage tank for treatment, and the waste liquid in the alkali tank is discharged into the wastewater station for treatment; S4, second magnetic electrolysis, start pump body four, pump the waste liquid in the anode liquid storage bin into the anode liquid circulation bin, start solenoid valve two to open the storage bin, the storage bin adds hydrogen peroxide, sodium chloride and the like to the anode liquid circulation bin through a four-way pipe to adjust the electrolyte composition and pH value, the waste liquid in the adjusted anode liquid circulation bin is pumped into the electrolysis bin through pump body five and circulated electrolyzed in the anode membrane frame and anode plate, the electrolysis is stopped when the hypophosphite is oxidized by more than 95% during the circulated electrolysis, and the waste liquid is pumped from the electrolysis bin into the anode liquid circulation bin through pump body three; S5, filtration and recovery, the waste liquid in the anode liquid circulation bin is pumped into the reactor through pump body three, and reagents such as calcium chloride, ferric sulfate, polyacrylamide, etc. are added to the reactor through the storage bin box. The motor is started, and the motor drives the stirring rod to rotate to stir, precipitate and flocculate the waste liquid. The solenoid valve three is started to open the reactor, and the reactor pours the waste liquid into the filter press. The filter press dehydrates the waste liquid. The recovered phosphate precipitate can be used as fertilizer, and the filtrate is discharged into the external wastewater pool.

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