Electrolyte Turbidity Monitoring and Product Treatment and Recycling System and Method

Abstract

The present invention discloses an electrolyte turbidity monitoring and product treatment and recycling system and method, which relates to the field of electrochemical machining. The system includes an on-line electrolyte monitoring device, an integrated control system and a product recovery and treatment device. A turbidity analyzer (2) and a metal element analyzer monitor the electrolyte turbidity and the content of related metal elements in real time; when the electrolyte turbidity reaches the threshold value, a filter press (11) starts to work, compresses the flocculent products in the electrolyte into solid cake materials, and completes the continuous actions of pressure filtration, blanking and collection; when the cumulative metal element content in the products of the filter press (11) reaches the recoverable target value, the product recovery and treatment device starts to work to complete drying, metal recovery and harmless treatment. The present invention ensures the cleanliness of the electrolyte during the electrochemical machining process, thereby ensuring the stability of the electrolyte conductivity, improving the stability and machining quality of the electrochemical machining; completes the recovery of precious metal elements in the electrolysis products to save metal resources and achieve green production.

Description

Technical Field

[0001] The present invention relates to the field of electrochemical machining, and particularly to a system and method for monitoring the turbidity of electrolyte and treating and recycling products. Background Art

[0002] As a special machining method, electrochemical machining has important applications in the machining of difficult-to-cut materials and has broad application prospects in fields such as aerospace. The electrolyte is a key factor in the electrochemical machining process. The turbidity of the solution affects the conductivity, and the magnitude of the conductivity directly affects the machining quality and machining accuracy. Therefore, real-time monitoring of the turbidity of the solution to ensure the stability of the conductivity of the electrolyte is a key point for ensuring the quality of electrochemical machining.

[0003] The products of electrochemical machining contain precious metals such as chromium and nickel. Directly discarding and treating them will cause waste of resources. Recycling and reusing the products can obtain considerable economic benefits. At the same time, the heavy metals in the electrolysis products are often unfriendly to the environment. By harmlessly treating the products, the environment can be protected and green machining can be achieved.

[0004] Chinese Patent CN202122698409.3 discloses an on-line analysis and monitoring device for turbidity water quality. The device includes a cabinet body and a control module, a power supply module, an information processing module, a spectral monitoring unit, a stock solution tank, a first water pump and a second water pump arranged in the cabinet body. The main advantages of this patent are that its new cabinet body can protect the devices and improve the service life; by reasonably arranging each device, the monitoring device has a small volume; it includes a data transmission module to realize user interaction; the inner wall of the detection tank uses black light-absorbing materials to reduce stray light and improve the detection accuracy. Although this patent can be industrialized, it only involves on-line monitoring of turbidity and cannot set a threshold according to the turbidity value to automatically process the water body turbidity, resulting in untimely treatment of water quality problems.

[0005] Chinese Patent CN201210393387.2 discloses an electrochemical machining electrolyte circulation filtration system and its control method. Two loops are used in parallel to filter the electrolyte, and the cleanliness of the electrolyte input into the machining area is high; an electrolyte filtration monitoring device is used to monitor the secondary filter and the plate and frame filter press in real time; an electrolyte component control device is used to monitor the pH value and conductivity of the electrolyte in real time; an industrial control computer is used to control the on-off of the solenoid valve corresponding to the liquid adjustment tank to ensure the stability of the pH value and conductivity of the electrolyte during the electrochemical machining process. However, this method lacks the monitoring of the turbidity of the electrolyte and cannot timely judge the state of the electrolyte according to the turbidity and automatically control the pressure filtration.

[0006] Chinese Patent CN202111260037.4 discloses an SDS desulfurization by - product recovery system and its recovery method. By adopting steps such as pretreatment purification, metathesis reaction, ammonium bicarbonate cycle, ammonium sulfate crystallization, and cooling precipitation, the recovery of sodium bicarbonate and the manufacture of ammonium sulfate are completed. High - purity baking soda can be obtained, and the self - circulation of sodium and sulfate radicals in the factory can be achieved. However, the technological process involved in this patent is complex, and the process system can only perform recovery treatment for specific target products.

[0007] Chinese Patent CN201610728732.1 discloses a waste salt reuse and recovery system. The waste salt can be simply filtered and then sent to an electrolytic cell for electrolysis without multiple refining treatments of the brine. The gas generated by electrolysis is collected and used, which can be used to produce basic chemical raw materials and reduce the emission of waste salt. However, this patent only separates gas - liquid and cannot further achieve solid - liquid separation to obtain directly usable solid chemical raw materials.

[0008] Currently, there is no green treatment and resource reuse system for electrolysis processing products. With the increasingly wide application of electrolysis processing in the aerospace field, it is extremely important to invent an electrolysis product treatment system. Summary of the Invention

[0009] The purpose of the present invention is to provide a complete integrated electrolyte turbidity monitoring and product treatment and recycling system and method in view of the deficiencies of the current electrolysis processing system.

[0010] The technical solution adopted by the present invention is: an electrolyte turbidity monitoring and product treatment and recycling system, characterized in that it includes an electrolyte tank, a turbidity analyzer, a metal element analyzer, an integrated control system, a filter press, and a product recovery and treatment device; the above - mentioned turbidity analyzer and metal element analyzer are respectively connected to the electrolyte tank through sampling pipelines; the above - mentioned filter press is respectively connected to the electrolyte tank through a liquid - extraction pipeline equipped with a check valve and a reflux pipeline equipped with a check valve; the inlet of the product recovery and treatment device is connected to the outlet of the filter press; the signal input end of the above - mentioned integrated control system is connected to the signal output ends of the turbidity analyzer and the metal element analyzer; the signal output end of the integrated control system is connected to the signal input end of the filter press and the signal input end of the product recovery and treatment device.

[0011] Working method of electrolyte turbidity monitoring and product treatment and recycling system, characterized by including the following processes: Step 1, a turbidity analyzer and a metal element analyzer monitor the electrolyte turbidity and the content of relevant metal elements in real time, and output signals to an integrated control system; Step 2, when the electrolyte turbidity reaches the threshold, the integrated control system outputs a control signal to a filter press, and the filter press starts to work, compressing the flocculent products in the electrolyte into solid cake materials, and completing the continuous actions of pressure filtration, blanking, and collection; Step 3, by monitoring the content of metal elements in the electrolyte in real time, calculate the content of metal elements in the flocculent products in the solution, and obtain the cumulative metal element content in the filter press products; when the cumulative metal element content in the filter press products reaches the recoverable target value, the integrated control system outputs a control signal to the product recovery and treatment device, and the product recovery and treatment device starts to work, and completes drying, metal recovery, and harmless treatment.

[0012] After the electrolyte turbidity reaches the threshold, full-automatic processing is carried out by the integrated control system to keep the turbidity within a certain range all the time, so as to ensure the stability of the conductivity and improve the stability and processing quality of electrolytic machining.

[0013] An online turbidity analyzer is adopted to monitor the turbidity in real time, preventing the untimely update of data from affecting the quality of the electrolyte and further affecting the processing quality.

[0014] The metal element analyzer includes a chromium content analyzer and a nickel content analyzer. Other metal element analyzers can be added according to specific usage requirements.

[0015] The product recovery and treatment device successively includes a drying device, a metal smelting device, and a harmless treatment device.

[0016] The recycling of the product is to dry the electrolytic mud, extract and recover precious metals such as chromium and nickel in the electrolytic products, and realize resource regeneration. The remaining products are subjected to harmless treatment to realize green processing.

[0017] The electrolyte turbidity monitoring and product treatment and recycling system integrates turbidity monitoring, metal content detection, collection, and recycling, forming a complete post-treatment system for electrolytic machining.

[0018] The filter press adopted has a signal interface, the equipment runs automatically throughout the process, monitors the operating status online, and can automatically stop and protect in case of a failure, realizing unattended operation.

[0019] The beneficial effects of the present invention are:

[0020] By measuring the content of metal elements in the workpiece and the content of metal elements in the monitored solution, calculate the content of metal elements in the products that are difficult to directly measure, which is beneficial to judging the recovery value of the products for recycling and reuse.

[0021] In response to the traditional method of directly discarding or burying the products of electrolytic machining, a product recycling and treatment device is introduced to recycle some heavy metals in the products, bringing economic benefits; and the remaining products are harmlessly treated to achieve the purpose of green machining.

[0022] Online monitoring and control of the electrolyte turbidity are realized. After the turbidity reaches the threshold value, automatic pressure filtration can be carried out in a timely manner to ensure the cleanliness of the solution, improving the stability and machining quality of electrolytic machining.

[0023] The turbidity monitoring and control, metal content detection, collection, and recycling systems are highly integrated to form a complete electrolytic product treatment solution. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the present invention;

[0025] In the figure: 1 electrolyte tank; 2 turbidity analyzer; 3 chromium analyzer; 4 nickel analyzer; 5 circuit control line; 6 integrated control system; 7 harmless treatment equipment; 8 metal smelting equipment; 9 drying equipment; 10 product transportation pipeline; 11 filter press; 12 reflux pipeline; 13 liquid extraction pipeline; 14 sampling pipeline. Detailed Embodiment

[0026] The implementation process will be described in detail below in conjunction with the drawings of the present invention.

[0027] The turbidity analyzer 2 extracts an electrolyte sample from the electrolyte tank 1 through the sampling pipeline 14 to detect the turbidity. When the turbidity reaches the threshold value, a signal is output to the integrated control system 6. After each detection, the electrolyte is then refluxed back to the electrolyte tank 1.

[0028] The filter press 11 is a plate and frame filter press. The chromium analyzer 3 and nickel analyzer 4 extract an electrolyte sample from the electrolyte tank 1 through the sampling pipeline 14 to detect the chromium and nickel contents in the solution respectively, calculate the chromium and nickel contents in the flocculent products in the solution, and obtain the cumulative chromium and nickel contents in the products of the filter press 11; when the cumulative chromium and nickel contents in the products of the filter press 11 reach the recoverable target value, the integrated control system 6 outputs a control signal to the product recycling and treatment device, and the product recycling and treatment device starts to work to complete drying, metal recovery, and harmless treatment.

[0029] The turbidity analyzer 2, chromium analyzer 3, nickel analyzer 4, and plate and frame filter press are connected to the integrated control system 6 through the circuit control line 5. Signals are output to the integrated control system 6 in real time for analysis and storage. At the same time, when the plate and frame filter press receives the signal output by the integrated control system 6, it can automatically perform operations such as pressure filtration.

[0030] The electrolyte tank 1 is connected to the plate and frame filter press through the liquid extraction pipeline 13 and the reflux pipeline 12. Check valves are installed on the two pipelines respectively to prevent the mixing of the electrolyte before and after filtration.

[0031] After the plate and frame filter press finishes filtration, it automatically discharges materials and collects the products onto the bottom conveyor, and then sends them to the drying equipment 9 through the product transportation pipeline 10 for drying treatment.

[0032] Part of the electrolytic products after drying, after being processed by the metal smelting equipment 8, are heavy metal materials such as chromium and nickel with high economic value; the remaining products, after being processed by the harmless treatment equipment 7, are environmentally friendly and harmless, and can be used as building materials or buried.

Claims

1. An electrolyte turbidity monitoring and product treatment and recycling system, characterized in that : It includes an electrolyte tank (1), a turbidity analyzer (2), a metal element analyzer, an integrated control system (6), a filter press (11), and a product recovery and treatment device; The above-mentioned turbidity analyzer (2) and metal element analyzer are respectively connected to the electrolyte tank (1) through sampling pipelines; the metal element analyzer includes a chromium analyzer (3) and a nickel analyzer (4); The above-mentioned filter press (11) is respectively connected to the electrolyte tank (1) through a liquid extraction pipeline equipped with a check valve and a reflux pipeline equipped with a check valve; the inlet of the product recovery and treatment device is connected to the outlet of the filter press (11); the product recovery and treatment device sequentially includes a drying device (9), a metal smelting device (8), and a harmless treatment device (7); The signal input end of the above-mentioned integrated control system (6) is connected to the signal output ends of the turbidity analyzer (2) and the metal element analyzer; the signal output end of the integrated control system (6) is connected to the signal input end of the filter press (11) and the signal input end of the product recovery and treatment device; The turbidity analyzer (2), chromium analyzer (3), nickel analyzer (4), and plate and frame filter press are connected to the integrated control system (6) through a circuit control line (5), and the signals are output to the integrated control system (6) in real time for analysis and storage. At the same time, when the plate and frame filter press receives the signal output by the integrated control system (6), it can automatically perform the filter pressing operation; the electrolyte tank (1) is connected to the plate and frame filter press through a liquid extraction pipeline (13) and a reflux pipeline (12), and check valves are installed on both pipelines. After the plate and frame filter press finishes filter pressing, it automatically discharges the material and collects the product onto the bottom conveyor, and then sends it to the drying device (9) through the product transportation pipeline (10) for drying treatment.

2. The working method of the electrolyte turbidity monitoring and product treatment and recycling system according to claim 1, characterized in that It includes the following processes: Step 1: The turbidity analyzer (2) and the metal element analyzer monitor the turbidity of the electrolyte and the content of relevant metal elements in real time, and output the signals to the integrated control system (6); Step 2: When the turbidity of the electrolyte reaches the threshold value, the integrated control system (6) outputs a control signal to the filter press (11), and the filter press starts to work, compressing the flocculent product in the electrolyte into a solid cake, and completing the continuous actions of filter pressing, discharging, and collecting; Step 3: Through the real-time monitoring of the metal element content in the electrolyte, calculate the metal element content in the flocculent product in the solution, and obtain the cumulative metal element content in the product of the filter press (11); when the cumulative metal element content in the product of the filter press (11) reaches the recoverable target value, the integrated control system (6) outputs a control signal to the product recovery and treatment device, and the product recovery and treatment device starts to work to complete drying, metal recovery, and harmless treatment.

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