Electronickelling recycled water recycling device

Abstract

The utility model relates to the technical field of wastewater treatment and recycling, in particular to a recycling device for electroplating nickel recycled water, which improves the recycling efficiency and reduces the resource waste. Comprising a recovery tank, a filter, an ion exchanger, a pure water storage tank, a regenerant storage tank, an electrodialyzer and a wastewater collection tank, the recovery tank is connected with the filter through a pipeline, the filter is connected with the ion exchanger through a pipeline, the pure water storage tank is respectively connected with the filter and the ion exchanger through pipelines, and the regenerant storage tank is connected with the ion exchanger through a pipeline. The wastewater collecting tank comprises a first collecting tank and a second collecting tank, the first collecting tank is respectively connected with the ion exchanger and the electrodialyzer through pipelines, and the second collecting tank is connected with the electrodialyzer through a pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment and recycling, and in particular to a device for recycling and reusing electroplated nickel recovery water. Background Technology

[0002] Electroplating is a surface treatment technology that deposits a layer of metal onto the surface of another material through an electrolytic process. Nickel, as an important electroplating material, is widely used in many industries due to its excellent corrosion resistance, hardness, and appearance properties. In the nickel electroplating process, nickel exists in ionic form in the plating solution. When an electric current passes through, nickel ions are reduced at the cathode and deposited as a metallic nickel layer. However, not all nickel is completely deposited on the object to be plated; some nickel ions remain in the plating solution and flow into the wastewater with the rinsing water. The electroplating industry generates a large amount of nickel-containing wastewater every year; direct discharge of this wastewater is not only a waste of resources but also causes serious environmental pollution.

[0003] Existing nickel wastewater recovery devices typically only perform simple filtration, resulting in low nickel concentration and purification rates. Furthermore, the treated wastewater cannot be reused for further production and must be discharged, failing to achieve the goal of energy conservation. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a device for recycling and reusing electroplated nickel recovery water to improve recycling efficiency and reduce resource waste.

[0005] The present invention relates to a device for recycling and reusing electroplated nickel recovery water, comprising a recovery tank, a filter, an ion exchanger, a pure water storage tank, a regenerant storage tank, an electrodialysis unit, and a wastewater collection tank. The recovery tank is connected to the filter via a pipeline, the filter is connected to the ion exchanger via a pipeline, the pure water storage tank is connected to both the filter and the ion exchanger via pipelines, the regenerant storage tank is connected to the ion exchanger via a pipeline, and the wastewater collection tank comprises a first collection tank and a second collection tank. The first collection tank is connected to both the ion exchanger and the electrodialysis unit via pipelines, and the second collection tank is connected to the electrodialysis unit via a pipeline.

[0006] Furthermore, the inlet and outlet of the filter are respectively located on its upper and lower sides, and a filter screen assembly is installed inside the filter.

[0007] Furthermore, the filter assembly includes a plurality of filters distributed in the longitudinal direction, and the number of filters is set to at least one.

[0008] Furthermore, the ion exchanger includes at least two ion exchange columns.

[0009] Furthermore, the regenerant storage tank includes an acid regenerant storage tank and an alkali regenerant storage tank, both of which are connected to the ion exchange column.

[0010] Furthermore, transfer pumps are installed on the pipelines between the recovery tank and the filter, between the electrodialysis unit and the first collection tank, and between the electrodialysis unit and the second collection tank.

[0011] Furthermore, solenoid valves are installed on each pipeline.

[0012] Furthermore, it also includes a control cabinet. An EC sensor, a pH sensor, and a flow sensor are installed on the pipeline connecting the ion exchanger and the first collection tank. The control cabinet uses the data transmitted by the EC sensor, pH sensor, and flow sensor to control the start and stop of the delivery pump and solenoid valve.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] By combining multi-stage filtration, ion exchange, and electrodialysis through filters, ion exchangers, and electrodialysis, high concentration and effective recovery of nickel ions are achieved, significantly improving the recovery rate of nickel resources, reducing metal waste, and allowing the treated liquid to be reused in the production process, reducing dependence on external water sources. Through control cabinets and various sensors, automated management and real-time monitoring are achieved, reducing the need for manual intervention and improving operational accuracy and system stability. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram of the electrodialysis device of this utility model;

[0018] Figure 3 This is a schematic diagram of the filter structure of this utility model;

[0019] Figure 4 This is a connection diagram of the control cabinet of this utility model;

[0020] The following labels are used in the attached diagram: 1. Recovery tank; 2. Filter; 21. Filter assembly; 3. Ion exchanger; 31. Anode plate; 32. Cathode plate; 33. Cation unidirectional membrane; 34. Compartment; 4. Pure water storage tank; 5. Regenerant storage tank; 51. Acid regenerant storage tank; 52. Alkali regenerant storage tank; 6. Electrodialysis unit; 7. Wastewater collection tank; 71. First collection tank; 72. Second collection tank; 8. Transfer pump; 9. Solenoid valve; 10. Control cabinet; 11. EC sensor; 12. pH sensor; 13. Flow sensor. Detailed Implementation

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] like Figures 1 to 4 As shown, the electroplating nickel recovery water recycling device of this utility model includes a recovery tank 1, a filter 2, an ion exchanger 3, a pure water storage tank 4, a regenerant storage tank 5, an electrodialysis unit 6, and a wastewater collection tank 7. The recovery tank 1 is connected to the filter 2 through a pipeline, the filter 2 is connected to the ion exchanger 3 through a pipeline, the pure water storage tank 4 is connected to the filter 2 and the ion exchanger 3 through pipelines, the regenerant storage tank 5 is connected to the ion exchanger 3 through a pipeline, and the wastewater collection tank 7 includes a first collection tank 71 and a second collection tank 72. The first collection tank 71 is connected to the ion exchanger 3 and the electrodialysis unit 6 through pipelines, and the second collection tank 72 is connected to the electrodialysis unit 6 through a pipeline.

[0023] Nickel-containing wastewater from the electroplating tank is collected in recovery tank 1. During operation, the wastewater in recovery tank 1 is sent to filter 2 for physical filtration to remove large particulate impurities and other non-dissolved substances, protecting subsequent treatment units and improving overall treatment efficiency. The pre-filtered liquid enters ion exchanger 3, which uses a specific resin to selectively adsorb nickel ions in the solution, effectively separating nickel from other components. The liquid output from ion exchanger 3 is sent to the first collection tank 71 for further treatment, either for discharge or reuse. When ion exchanger 3 is saturated, it needs to be regenerated using regenerant in regenerant storage tank 5 for reuse. The regeneration eluent contains a large amount of metallic nickel ions, which are used to further improve nickel content. To improve the recovery rate, the regenerated eluent is fed into an electrodialysis unit 6 for selective separation and concentration. The electrodialysis unit 6 consists of an anode plate 31, a cathode plate 32, and a cation exchange membrane 33. The cation exchange membrane 33 divides the electrodialysis unit 6 into two compartments 34. When a DC voltage is applied, an electric field is formed between the electrodes. Nickel ions in the solution are attracted by the electric field and move towards the cathode, passing through the cation exchange membrane 33 and entering the concentration chamber. The liquid in the concentration chamber contains a high concentration of nickel ions. This part of the liquid can be collected by the second collection tank 72 and reused for plating solution replenishment. The liquid in the dilution chamber is purified water, which is sent to the first collection tank 71 for further treatment. Therefore, resource recycling is achieved, and the demand for external water sources is reduced.

[0024] The inlet and outlet of the filter 2 are respectively located on its upper and lower sides, and the filter 2 is equipped with a filter screen assembly 21. After the liquid enters the filter 2 from the top, it flows downward under the action of gravity. This design helps to ensure that the liquid is completely filtered by the filter screen assembly 21, increases the chance of intercepting fine particles, improves the filtration accuracy, and can more effectively remove tiny suspended matter and other impurities.

[0025] The preferred filter assembly 21 includes a plurality of filter screens distributed in the longitudinal direction, and the number of filter screens is set to at least one; multi-stage filtration is achieved by setting different types of filter screens; the diameter of the filter screens decreases from top to bottom, first using coarser filter screens to remove large particulate impurities, and then gradually using finer filter screens for fine filtration, thereby enhancing the filtration accuracy.

[0026] The preferred ion exchanger 3 includes at least two ion exchange columns; multiple ion exchange columns can be used in parallel or in series, and the total throughput can be adjusted as needed; under high load conditions, the system throughput can be increased by increasing the effective processing volume; while under low load conditions, some columns can be selectively shut down to save energy.

[0027] The preferred regenerant storage tank 5 includes an acid regenerant storage tank 51 and an alkali regenerant storage tank 52, both of which are connected to the ion exchange column. By separately configuring acidic and alkaline regenerants, an appropriate regenerant can be selected as needed to restore the function of the ion exchange resin. The acid and alkali regenerants are stored separately and independently connected to their respective ion exchange columns, avoiding possible mixing or reaction of the two chemicals during the regeneration process. This ensures the safety and effectiveness of the regeneration process, protects the equipment from potential damage, facilitates management and monitoring of their respective usage, simplifies daily maintenance, reduces the risk of misoperation, and improves the reliability and stability of the system.

[0028] A transfer pump 8 is installed on the pipelines between the preferred recovery tank 1 and the filter 2, between the electrodialysis unit 6 and the first collection tank 71, and between the electrodialysis unit 6 and the second collection tank 72. The transfer pump 8 can provide a constant fluid pressure to ensure that the liquid passes through each processing unit at a stable flow rate, avoiding problems such as low processing efficiency or equipment damage caused by flow rate fluctuations. By adjusting the operating parameters of the transfer pump 8, the flow rate can be flexibly adjusted according to actual needs to adapt to the operating requirements under different load conditions and optimize resource utilization.

[0029] Ideally, each pipeline is equipped with a solenoid valve 9; the solenoid valve 9 provides fluid control capability for the entire device, ensuring that each processing unit works according to the predetermined program and avoiding unnecessary waste of resources; at the same time, the solenoid valve 9 serves as a safety shut-off device, immediately cutting off the liquid flow in an emergency to prevent the accident from escalating, ensuring the stable operation of the system and reducing potential risks.

[0030] To further improve control accuracy, the device also includes a control cabinet 10. An EC sensor 11, a pH sensor 12, and a flow sensor 13 are installed on the pipeline connecting the ion exchanger 3 and the first collection tank 71. The control cabinet 10 uses data transmitted from the EC sensor 11, pH sensor 12, and flow sensor 13 to control the start and stop of the transfer pump 8 and the solenoid valve 9. The control cabinet 10 integrates a PLC control system, which can automatically adjust operating parameters based on the data provided by the sensors, achieving fully automated management, reducing manual intervention, and improving system stability and reliability. The EC sensor 11 is used to measure conductivity, reflecting the ion concentration in the water. The pH sensor 12 monitors the acidity or alkalinity of the solution, and the flow sensor 13 records the liquid flow rate. When the ion exchange resin becomes saturated and ineffective, the ion concentration increases and the conductivity rises, requiring regeneration of the ion exchange resin. After regeneration, the conductivity should decrease to a specific value, indicating that the resin has been fully regenerated. If the pH sensor 12 indicates that the pH value deviates from the normal range, the control cabinet 10 adjusts the amount of acid-base regenerator added by controlling the solenoid valve 9 to restore the ideal pH level. If the flow sensor 13 reports that the flow rate is too low, the control cabinet 10 can increase the workload of the delivery pump 8 or check for problems such as blockage.

[0031] The electroplating nickel recovery water recycling device of this utility model first enters the recovery tank 1 during operation, and then is sent to the filter 2 by the transfer pump 8. The filter screen assembly 21 in the filter 2 removes large particulate impurities and other suspended solids to ensure the safe operation of the subsequent treatment unit. After preliminary filtration, the wastewater enters the ion exchanger 3, which contains at least two ion exchange columns. The wastewater flows through these columns sequentially or in parallel, and the nickel ions in the solution are removed by selective adsorption to achieve water purification. The liquid flowing out of the ion exchanger 3 enters the first collection tank 71 for discharge or reuse after meeting the standards.

[0032] Once the ion exchange resin reaches saturation, the system switches to regeneration mode. The acid regenerator storage tank 51 and the alkali regenerator storage tank 52 provide appropriate regenerators, respectively. The regeneration process is completed by controlling the solenoid valve 9 and the transfer pump 8 through the control cabinet 10, restoring the exchange capacity of the ion exchange resin and ensuring its continued effective operation. The regenerated eluent enters the electrodialysis unit 6, which uses a DC electric field to further concentrate the nickel ions in the solution. The nickel ions enter the concentration chamber, and the high-concentration nickel solution is collected by the second collection tank 72 and reused for plating solution replenishment. The liquid in the dilution chamber is sent to the first collection tank 71 for further processing.

[0033] The electroplating nickel recovery water recycling device of this utility model can be installed, connected or set up in a common mechanical way, and can be implemented as long as it can achieve its beneficial effect.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for recycling and reusing water from nickel plating, characterized in that, The system includes a recovery tank (1), a filter (2), an ion exchanger (3), a pure water storage tank (4), a regenerant storage tank (5), an electrodialysis unit (6), and a wastewater collection tank (7). The recovery tank (1) is connected to the filter (2) via a pipeline. The filter (2) is connected to the ion exchanger (3) via a pipeline. The pure water storage tank (4) is connected to both the filter (2) and the ion exchanger (3) via pipelines. The regenerant storage tank (5) is connected to the ion exchanger (3) via a pipeline. The wastewater collection tank (7) includes a first collection tank (71) and a second collection tank (72). The first collection tank (71) is connected to both the ion exchanger (3) and the electrodialysis unit (6) via pipelines. The second collection tank (72) is connected to the electrodialysis unit (6) via a pipeline.

2. The electroplating nickel recovery water recycling device as described in claim 1, characterized in that, The inlet and outlet of the filter (2) are respectively located on its upper and lower sides, and a filter screen assembly (21) is provided inside the filter (2).

3. The electroplating nickel recovery water recycling device as described in claim 2, characterized in that, The filter assembly (21) includes a plurality of filters distributed in the longitudinal direction, and the number of filters is at least one.

4. The electroplating nickel recovery water recycling device as described in claim 1, characterized in that, The ion exchanger (3) includes at least two ion exchange columns.

5. The electroplating nickel recovery water recycling device as described in claim 4, characterized in that, The regenerant storage tank (5) includes an acid regenerant storage tank (51) and an alkali regenerant storage tank (52), both of which are connected to the ion exchange column.

6. The electroplating nickel recovery water recycling device as described in claim 1, characterized in that, A delivery pump (8) is installed on the pipeline between the recovery tank (1) and the filter (2), between the electrodialysis unit (6) and the first collection tank (71), and between the electrodialysis unit (6) and the second collection tank (72).

7. The electroplating nickel recovery water recycling device as described in claim 6, characterized in that, Each of the pipelines is equipped with a solenoid valve (9).

8. The electroplating nickel recovery water recycling device as described in claim 7, characterized in that, It also includes a control cabinet (10), on which an EC sensor (11), a pH sensor (12) and a flow sensor (13) are installed on the pipeline connecting the ion exchanger (3) and the first collection tank (71). The control cabinet (10) controls the start and stop of the delivery pump (8) and the solenoid valve (9) through the data transmitted by the EC sensor (11), the pH sensor (12) and the flow sensor (13).

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