Electrolysis equipment for recycling micro-etching tail liquid

Abstract

A plurality of ionic membrane positive electrode frames are mounted in an electrolysis cylinder, the ionic membrane positive electrode frames are positive electrode areas, the two sides of each ionic membrane positive electrode frame are negative electrode areas, positive electrode plates are mounted in the ionic membrane positive electrode frames, negative electrode plates are mounted in the negative electrode areas, the positive electrode plates are connected with a rectifier through positive electrode copper bars, and the negative electrode plates are connected with the rectifier through negative electrode copper bars; the positive electrode area is communicated with the positive electrode liquid storage cylinder through a positive electrode liquid circulation assembly, the negative electrode area is communicated with the negative electrode liquid storage cylinder through a negative electrode liquid circulation system, an exhaust assembly is arranged outside the positive electrode liquid storage cylinder, and the exhaust mechanism is used for exhausting gas generated in the electrolysis process. Solutions in the positive and negative electrode areas are separated by adopting the ionic membrane positive electrode frame, so that the influence of a positive electrode solution on a negative electrode or a negative electrode solution on a positive electrode is avoided, and the electrolysis efficiency is improved; due to the independent liquid storage cylinder system and the liquid supplementing assembly, continuous circulation and balance of the electrolyte are ensured, and sufficient electrolysis of the micro-etching tail liquid is ensured; and the safety and the stability of the reaction process are ensured by a perfect exhaust system.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-etching electrolysis recycling, in particular to electrolysis equipment for recycling micro-etching tail liquid. Background Art

[0002] The PCB industry is fundamental to the electronics, information, and home appliance industries. In recent years, my country has maintained an annual growth rate of approximately 10% to 12%. Currently, there are nearly 5,000 PCB companies of various sizes nationwide, with an annual output of nearly 150 million square meters of PCB boards. During PCB production, micro-etching takes place in micro-etching tanks, generating large amounts of micro-etching tail fluids. These tail fluids contain chemical components such as sulfuric acid, sodium persulfate, copper sulfate, and sodium sulfate. The copper content in these tail fluids can be as high as 20 to 40 g / L.

[0003] The prior art uses electrochemical oxidation to electrolytically redox the micro-etching tail solution, wherein an oxidation reaction occurs at the anode and sulfate in the micro-etching tail solution is Oxidized to persulfate The electrolysis reaction mechanism is as follows:

[0004] ①H2O-e - → OH+H +

[0005]

[0006] A reduction reaction occurs at the cathode, and copper is deposited on the cathode surface. The reaction mechanism is as follows:

[0007] Cu 2+ +2e - →Cu

[0008] By utilizing the above reaction mechanism, the copper ions in the micro-etching tail solution can be electrolytically precipitated, and the sodium sulfate in the micro-etching tail solution can be converted into sodium persulfate, so that the solution can restore its micro-etching ability and can be reused in the micro-etching production process.

[0009] In existing applications, most micro-etching tail liquid recovery and recycling devices place several electrolytic plates within an electrolytic cell. When powered on, they electrolyze the copper ions from the micro-etching tail liquid. However, these existing solutions still suffer from the same or similar drawbacks: insufficient electrolysis of the micro-etching tail liquid within the cell, resulting in low micro-etching tail liquid regeneration efficiency. Summary of the Invention

[0010] In response to the problems raised in the background technology, the purpose of the present invention is to propose an electrolysis device for recycling micro-etching tail liquid, which solves the problems of insufficient electrolysis and low regeneration efficiency of micro-etching tail liquid in existing micro-etching tail liquid electrolysis devices.

[0011] To achieve this purpose, the present invention adopts the following technical solutions:

[0012] An electrolysis device for recycling micro-etching tail liquid, comprising an electrolysis tank, a cathode liquid storage tank, a cathode liquid storage tank, a rectifier, a cathode copper busbar, a cathode copper busbar, and an exhaust mechanism;

[0013] Several ion membrane positive electrode frames are installed in the electrolysis cylinder, the ion membrane positive electrode frame is the positive electrode area, and both sides of the ion membrane positive electrode frame are negative electrode areas. Positive plates are installed in the ion membrane positive electrode frame, and negative plates are installed in the negative electrode area. The positive copper busbar and the negative copper busbar are respectively installed on the top of the electrolysis cylinder. The positive plate is connected to the rectifier through the positive copper busbar, and the negative plate is connected to the rectifier through the negative copper busbar.

[0014] The positive electrode area is connected to the positive electrode liquid storage tank through a positive electrode liquid circulation component, the negative electrode area is connected to the negative electrode liquid storage tank through a negative electrode liquid circulation system, the positive electrode liquid storage tank is connected to the negative electrode liquid storage tank through a liquid replenishing component, and an external discharge component is provided on the outside of the positive electrode liquid storage tank;

[0015] The exhaust mechanism is respectively connected to the electrolysis cylinder, the cathode liquid storage cylinder and the cathode liquid storage cylinder, and is used to discharge the gas generated during the electrolysis process.

[0016] Preferably, the ion membrane positive electrode frame includes a frame body, two inner separators, two ion membranes and two outer separators;

[0017] The inner partition, the ion membrane and the outer partition are sequentially arranged on both sides of the frame from the inside to the outside, and the inner partition and the outer partition are respectively provided with a plurality of electrolytic sensing ports, and the electrolytic sensing ports of the inner partition correspond to the electrolytic sensing ports of the outer partition one by one;

[0018] The frame is provided with an installation port, a positive liquid inlet and a positive liquid outlet, and the installation port, the positive liquid inlet and the positive liquid outlet are respectively communicated with the interior of the frame, the installation port is provided at the top of the frame, and the installation port is used to install the positive plate, the positive liquid inlet is connected to the positive liquid storage cylinder through a positive liquid inlet pipe, the positive liquid outlet is connected to the positive liquid storage cylinder through a positive liquid outlet pipe, the positive liquid inlet pipe is provided with a positive liquid circulation pump, and the positive liquid inlet pipe, the positive liquid outlet pipe and the positive liquid circulation pump constitute the positive liquid circulation assembly.

[0019] Preferably, the cathode liquid inlet is provided at the lower portion of the front end of the frame, and the cathode liquid outlet is provided at the upper portion of the rear end of the frame;

[0020] A liquid guide tube is further provided on the outside of the frame. The liquid guide tube is extended along the height direction of the frame. The cathode liquid inlet is connected to the cathode liquid inlet tube through the liquid guide tube.

[0021] Preferably, the positive electrode plate comprises a positive copper bar, a titanium skeleton and a plurality of BDD electrode sheets;

[0022] The titanium skeleton includes a connecting main frame and two mounting sub-frames, the two mounting sub-frames are arranged parallel to each other and are respectively connected to the connecting main frame, the connecting main frame is connected to the positive copper bar, and the positive copper bar is installed and connected to the positive copper busbar;

[0023] Several BDD electrode sheets are respectively installed on the two mounting sub-frames.

[0024] Preferably, when the positive electrode plate is installed in the ion membrane positive electrode frame, the positive electrode copper bar is located on the top of the frame, and the position of the BDD electrode sheet corresponds one-to-one to the position of the electrolysis sensing port.

[0025] Preferably, the negative electrode plate comprises a negative copper bar and a cathode titanium plate;

[0026] The area of ​​the cathode titanium plate is the same as that of the frame. The top of the cathode titanium plate is connected to the negative copper bar, and the negative copper bar is installed and connected to the negative copper busbar.

[0027] Preferably, the electrolysis cylinder is a cylinder body with an open top, and the cylinder body is composed of a front wall, a rear wall, a bottom wall and two side walls;

[0028] The front wall is provided with a negative liquid inlet, the rear wall is provided with a negative liquid outlet, the negative liquid inlet is connected to the negative liquid storage cylinder via a negative liquid inlet pipe, the negative liquid outlet is connected to the negative liquid storage cylinder via a negative liquid outlet pipe, the negative liquid inlet pipe is provided with a negative liquid circulation pump, and the negative liquid inlet pipe, the negative liquid outlet pipe and the negative liquid circulation pump constitute a negative liquid circulation assembly;

[0029] The front wall and the rear wall are further provided with a plurality of cathode liquid pipeline openings, the liquid guide pipe is connected to the cathode liquid inlet pipe through the cathode liquid pipeline openings, and the cathode liquid outlet pipe is connected to the cathode liquid outlet through the cathode liquid pipeline openings.

[0030] Preferably, the rehydration assembly includes a rehydration tube and a control valve, one end of the rehydration tube is connected to the negative electrode liquid circulation pump, and the other end of the rehydration tube is connected to the positive electrode liquid storage cylinder, and the control valve is installed on the rehydration tube, and the control valve is used to control the opening and closing of the rehydration tube.

[0031] Preferably, six ion membrane positive electrode frames and seven negative electrode plates are installed in the electrolysis cylinder.

[0032] Preferably, it comprises a plurality of independent electrolysis cylinders, and the plurality of electrolysis cylinders are arranged along the same straight line.

[0033] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0034] The utility model adopts an ion membrane positive electrode frame to separate the electrolyte solution in the positive electrode area and the negative electrode area, avoiding the direct impact of the positive electrode liquid on the negative electrode (plate) or the negative electrode liquid on the positive electrode (plate), thereby improving the electrolysis efficiency; secondly, the independent liquid storage cylinder system and liquid replenishing component ensure the continuous circulation and balance of the electrolyte, ensuring more complete electrolysis of the micro-etching tail liquid; finally, the perfect exhaust system ensures the safety and stability of the reaction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of an embodiment of the utility model;

[0036] Figure 2 is another schematic diagram of an embodiment of the present utility model;

[0037] Figure 3 Schematic diagram of an ion membrane positive electrode frame according to a new embodiment of the present invention;

[0038] Figure 4 This is an exploded view of an ion membrane positive electrode frame according to a new embodiment of the present invention;

[0039] Figure 5 Schematic diagram of a positive plate according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the assembly of the positive electrode plate and the ion membrane positive electrode frame according to one embodiment of the present invention;

[0041] Figure 7 Schematic diagram of a negative electrode plate according to an embodiment of the present invention;

[0042] Figure 8 The utility model is a structural diagram of an ion membrane positive electrode frame, a positive electrode plate and a negative electrode plate in one embodiment.

[0043] Wherein: electrolytic cylinder 10, ion membrane positive electrode frame 11, frame 111, installation port 1111, positive electrode liquid inlet 1112, positive electrode liquid outlet 1113, inner partition 112, ion membrane 113, outer partition 114, electrolysis sensor port 115, liquid guide tube 116, positive electrode plate 110, positive electrode copper strip 1101, titanium skeleton 1102, connecting main frame 11021, installation sub-frame 11022, BDD electrode sheet 1103, negative electrode plate 120, negative electrode copper strip 1201, Cathode titanium plate 1202, front wall 12, negative liquid inlet 121, rear wall 13, negative liquid outlet 131, positive liquid storage cylinder 21, negative liquid storage cylinder 22, rectifier 30, exhaust mechanism 40, positive liquid inlet pipe 51, positive liquid outlet pipe 52, positive liquid circulation pump 53, negative liquid inlet pipe 61, negative liquid outlet pipe 62, negative liquid circulation pump 63, positive copper busbar 71, negative copper busbar 72, rehydration assembly 80, rehydration pipe 81, control valve 82 and external discharge assembly 9. DETAILED DESCRIPTION

[0044] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0046] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features being referred to. Thus, a feature identified as "first," "second," and "third" may explicitly or implicitly include one or more of the features.

[0047] It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0048] The following is combined with Figures 1 to 8 The technical solution of the utility model is further illustrated through specific implementation methods.

[0049] An electrolysis device for recycling micro-etching tail liquid includes an electrolysis cylinder 10, a cathode liquid storage cylinder 21, a cathode liquid storage cylinder 22, a rectifier 30, a cathode copper busbar 71, a cathode copper busbar 72, and an exhaust mechanism 40;

[0050] Several ion membrane positive electrode frames 11 are installed in the electrolysis cylinder 10. The ion membrane positive electrode frame 11 is a positive electrode area. Both sides of the ion membrane positive electrode frame 11 are negative electrode areas. A positive electrode plate 110 is installed in the ion membrane positive electrode frame 11, and a negative electrode plate 120 is installed in the negative electrode area. The positive copper bus 71 and the negative copper bus 72 are respectively installed on the top of the electrolysis cylinder 10. The positive electrode plate 110 is connected to the rectifier 30 through the positive copper bus 71, and the negative electrode plate 120 is connected to the rectifier 30 through the negative copper bus 72.

[0051] The positive electrode area is connected to the positive electrode liquid storage tank 21 through a positive electrode liquid circulation component, and the negative electrode area is connected to the negative electrode liquid storage tank 22 through a negative electrode liquid circulation system. The positive electrode liquid storage tank 21 is connected to the negative electrode liquid storage tank 22 through a liquid replenishing component 80. An external discharge component 9 is provided on the outside of the positive electrode liquid storage tank 21;

[0052] The exhaust mechanism 40 is in communication with the electrolysis cylinder 10 , the cathode solution storage cylinder 21 , and the cathode solution storage cylinder 22 , respectively, for exhausting gas generated during the electrolysis process.

[0053] The present invention proposes an innovative micro-etching tail liquid recycling electrolysis equipment, including core components such as an electrolysis cylinder 10, a cathode liquid storage cylinder 21, a cathode liquid storage cylinder 22, a rectifier 30, a positive copper bus 71, a negative copper bus 72 and an exhaust mechanism 40. A plurality of ion membrane positive electrode frames 11 are installed in the electrolysis cylinder 10, forming a unique "sandwich" structure, so that the positive electrode area is surrounded by the negative electrode areas on both sides. This structure not only increases the reaction area, but also ensures sufficient contact and reaction of the electrolyte. The positive plate 110 and the negative plate 120 are respectively installed in the positive electrode area and the negative electrode area, and are connected to the rectifier 30 through the positive copper bus 71 and the negative copper bus 72, forming an efficient circuit system. To ensure the electrolysis efficiency of the micro-etching tail liquid, the positive liquid circulation assembly circulates the positive liquid in the positive electrode area through the positive liquid storage tank 21, and the negative liquid in the negative electrode area through the negative liquid circulation assembly 60, ensuring sufficient electrolysis of the micro-etching waste liquid. In addition, the positive liquid storage tank 21 and the negative liquid storage tank 22 are interconnected through the liquid replenishment assembly 80, ensuring the stability and controllability of the electrolytic reaction in the electrolysis tank 10, and ensuring the circulation and balance of the electrolyte (micro-etching tail liquid).

[0054] In actual application, the micro-etching tail liquid is first added to the positive liquid storage tank 21 and the negative liquid storage tank 22. During the power supply operation of the equipment, the micro-etching tail liquid in the positive liquid storage tank 21 enters the positive electrode area (ion membrane positive electrode frame 11) through the positive liquid circulation component, and the micro-etching tail liquid in the negative liquid storage tank 22 enters the negative electrode area through the negative liquid circulation component 60. Under the power-up action of the rectifier 30, an oxidation reaction occurs in the positive electrode area to convert sulfate Oxidized to persulfate A reduction reaction occurs in the negative electrode, converting copper ions Cu 2+ It is reduced to metallic copper and deposited on the negative plate 120. This partitioning design not only improves the reaction efficiency, but also avoids the mutual interference of the positive and negative electrode reactions. During the electrolytic reaction, the positive electrode area and the negative electrode area continuously circulate the micro-etching tail liquid through the positive liquid circulation component and the negative liquid circulation component 60, so that the micro-etching tail liquid stored in the positive liquid storage cylinder 21 is continuously circulated for a sufficient oxidation reaction. When the sodium persulfate in the positive liquid is increased to a certain concentration, the external discharge component 9 is used to discharge the "regenerated" micro-etching liquid in the positive liquid storage cylinder 21, so that the micro-etching liquid can be put into the production of PCB boards again. After the solution in the positive liquid storage cylinder 21 is discharged, the solution in the negative liquid storage cylinder 22 is transferred to the positive liquid storage cylinder 21 through the rehydration component 80, and the electrolytic reaction continues, so that the reaction of the micro-etching tail liquid is more sufficient. As the reaction proceeds, gas is generated during the electrolysis process. The exhaust mechanism 40 is connected to the electrolysis cylinder 10, the cathode liquid storage cylinder 21 and the cathode liquid storage cylinder 22, which not only ensures the safety of the reaction process, but also helps to maintain a stable reaction environment and further improve the efficiency.

[0055] Compared with traditional micro-etching tail liquid electrolysis recycling equipment, the utility model uses an ion membrane positive electrode frame to separate the electrolytic solutions in the positive and negative electrode areas, avoiding the direct impact of the positive electrode liquid on the negative electrode (plate) or the negative electrode liquid on the positive electrode (plate), thereby improving the electrolysis efficiency; secondly, the independent liquid storage tank system and liquid replenishment component ensure the continuous circulation and balance of the electrolyte, ensuring more complete electrolysis of the micro-etching tail liquid; finally, the perfect exhaust system ensures the safety and stability of the reaction process.

[0056] The micro-etching tail liquid recycling electrolysis equipment of this utility model can significantly improve the sufficiency and efficiency of the electrolysis reaction. In practical applications, this equipment can more effectively treat the micro-etching tail liquid generated during the PCB production process, not only improving the copper recovery rate but also enabling the recycling of the micro-etching liquid. This not only reduces production costs but also reduces environmental pollution, providing strong support for the sustainable development of the PCB industry.

[0057] Furthermore, the ion membrane positive electrode frame 11 includes a frame body 111, two inner separators 112, two ion membranes 113 and two outer separators 114;

[0058] The inner partition 112, the ion membrane 113 and the outer partition 114 are sequentially arranged on both sides of the frame 111 from the inside to the outside. The inner partition 112 and the outer partition 114 are respectively provided with a plurality of electrolytic sensing ports 115. The electrolytic sensing ports 115 of the inner partition 112 correspond to the electrolytic sensing ports 115 of the outer partition 114 one-to-one.

[0059] The frame 111 is provided with an installation port 1111, a positive liquid inlet 1112 and a positive liquid outlet 1113. The installation port 1111, the positive liquid inlet 1112 and the positive liquid outlet 1113 are respectively connected to the interior of the frame 111. The installation port 1111 is provided at the top of the frame 111. The installation port 1111 is used to install the positive electrode plate 110. The positive liquid inlet 1112 is connected to the positive liquid storage cylinder 21 through the positive liquid inlet pipe 51. The positive liquid outlet 1113 is connected to the positive liquid storage cylinder 21 through the positive liquid outlet pipe 52. The positive liquid inlet pipe 51 is provided with a positive liquid circulation pump 53. The positive liquid inlet pipe 51, the positive liquid outlet pipe 52 and the positive liquid circulation pump 53 constitute the positive liquid circulation component.

[0060] By adding an inner separator 112 and an outer separator 114 to the ion membrane positive electrode frame 11 and sandwiching the ion membrane 113 in between, a more rigorous electrolytic isolation structure is formed. This allows the electrolyte solution between the positive and negative electrode regions to be more effectively separated, reducing direct contact and neutralization reactions between positive and negative ions, thereby improving the selectivity and efficiency of the electrolytic reaction.

[0061] The design of multiple electrolysis sensing ports 115 is respectively provided on the inner partition 112 and the outer partition 114, which solves the bulging phenomenon of the ion membrane 113 caused by the difference in liquid level inside and outside the positive electrode frame. Among them, the role of the outer partition 114 is to prevent the liquid level inside the frame from being higher than the liquid level outside the frame, and the high and low liquid level difference causes the ion membrane 113 to expand and bulge outward, contacting the negative electrode plate 120, affecting electrolysis; and the role of the inner partition 112 is to prevent the liquid level outside the frame from being higher than the liquid level inside the frame, and the high and low liquid level difference causes the ion membrane 113 to shrink into the frame (bulge inward), contacting the positive electrode plate 110, affecting electrolysis. At the same time, the electrolysis sensing ports 115 on the inner and outer partitions correspond one to one, making the electrolysis sensing port 115 of the ion membrane positive electrode frame 11 more open, and its own electrolysis sensing port will not be covered by other structures, affecting the electrolysis effect, ensuring that the ion exchange during the electrolysis process is more efficient.

[0062] The frame 111 is provided with a cathode liquid inlet 1112 and a cathode liquid outlet 1113, and is connected to the cathode liquid inlet pipe 51 ( Figure 1 and Figure 2 green pipe in the middle) and cathode liquid outlet pipe 52 ( Figure 2 The blue pipe in the figure is connected to the cathode liquid storage cylinder 21. This allows the cathode liquid to circulate during the electrolysis process, which not only improves the utilization rate of the cathode liquid but also helps maintain the concentration and temperature of the electrolyte in the electrolysis cylinder, thereby further improving the stability and efficiency of the electrolysis reaction. The cathode liquid circulation pump 53 allows the circulation of the cathode liquid to be precisely regulated by pump control, thereby optimizing the electrolysis process and improving the flexibility and controllability of the equipment.

[0063] By optimizing the structure and design of the ion membrane positive electrode frame 11, the improved electrolysis equipment has significantly improved electrolysis efficiency, resource utilization, stability, and controllability. Compared with traditional electrolysis devices, this design not only increases the radiation range of the electric field between the electrodes, but also improves the overall electrolysis speed and effect through improvements to the circulation system, thereby solving the problems of insufficient electrolysis reaction and low regeneration efficiency in traditional equipment.

[0064] Furthermore, the cathode liquid inlet 1112 is provided at the lower portion of the front end of the frame 111, and the cathode liquid outlet 1113 is provided at the upper portion of the rear end of the frame 111;

[0065] A liquid guide tube 116 is further provided on the outside of the frame 111 . The liquid guide tube 116 extends along the height direction of the frame 111 . The cathode liquid inlet 1112 is connected to the cathode liquid inlet pipe 51 through the liquid guide tube 116 .

[0066] The positioning of the cathode liquid inlet 1112 and cathode liquid outlet 1113, as well as the arrangement of the liquid conduit 116, optimizes the liquid flow path, allowing the cathode liquid to enter and exit the frame more efficiently, thereby improving electrolysis efficiency and the overall performance of the device. The cathode liquid inlet 1112 is located at the lower portion of the front end, and the cathode liquid outlet 1113 is located at the upper portion of the rear end as an overflow port, which helps to form natural convection or forced convection, so that the cathode liquid can be better distributed and mixed within the frame 111.

[0067] To further illustrate, since the ion membrane positive electrode frame 11 is arranged in the electrolysis cylinder 10, in order to facilitate the positive electrode liquid to enter the frame from the positive electrode liquid inlet located at the lower part of the frame 111, a liquid guide tube 116 extending along the height direction of the frame is provided to further optimize the liquid flow path.

[0068] By optimizing the cathode solution's flow path and distribution, we can mitigate issues such as electrolysis reaction instability or decreased efficiency caused by uneven cathode solution distribution. This design helps ensure stable electrolysis efficiency and performance during operation, thereby improving the stability and reliability of the equipment.

[0069] Furthermore, the positive electrode plate 110 includes a positive copper bar 1101, a titanium skeleton 1102 and a plurality of BDD electrode sheets 1103;

[0070] The titanium skeleton 1102 includes a connecting main frame 11021 and two mounting sub-frames 11022. The two mounting sub-frames 11022 are arranged parallel to each other and are respectively connected to the connecting main frame 11021. The connecting main frame 11021 is connected to the positive copper bar 1101, and the positive copper bar 1101 is installed and connected to the positive copper busbar 71.

[0071] Several BDD electrode sheets 1103 are respectively installed on the two mounting sub-racks 11022.

[0072] By designing the positive electrode plate 110 into a structure including a positive copper strip 1101, a titanium skeleton 1102 and a BDD electrode sheet 1103, the conductivity and structural stability of the positive electrode plate 110 are improved. Using a BDD electrode sheet 1103 (Boron-Doped Diamond) as the active part of the positive electrode plate 110, the BDD electrode sheet 1103 has excellent electrochemical properties, such as high oxygen evolution overpotential, low background current and high stability. This enables the BDD electrode sheet 1103 to catalyze the reaction more effectively during the electrolysis process, thereby improving the electrolysis efficiency. The titanium skeleton 1102 serves as the supporting structure of the BDD electrode sheet 1103, and has high strength, corrosion resistance and good conductivity. The ingenious design of the connecting main frame 11021 and two mounting subframes 11022 ensures that the BDD electrode sheets 1103 remain stable during installation and use, preventing them from falling off or deforming. Furthermore, the titanium skeleton structure reduces the overall resistance of the positive plate 110, effectively preventing localized overcurrent on the positive plate from causing overheating and affecting electrolysis. Finally, the titanium skeleton's corrosion resistance helps extend the service life of the entire positive plate. The positive copper strips 1101 are directly connected to the connecting main frame 11021 of the titanium skeleton 1102 and are connected to the rectifier 30 via the positive copper busbar 71. This ensures even current distribution across the positive plate 110, minimizing the risk of reduced electrolysis efficiency or electrode damage caused by uneven current distribution. Because the BDD electrode sheets 1103 are mounted to the titanium skeleton 1102 via the mounting subframes 11022, they can be easily removed and replaced when needed, reducing equipment maintenance costs and time.

[0073] Compared with traditional electrolysis equipment, one of the advantages of the electrolysis equipment of the present invention is that by optimizing the structure of the positive plate, the conductivity and structural stability during the electrolysis process are significantly improved, thereby improving the efficiency and effectiveness of the electrolysis equipment. The use of the titanium skeleton 1102 ensures that the deformation of the positive plate 110 in the electrolyte is minimal, while the excellent electrochemical performance of the BDD electrode sheet 1103 greatly improves the efficiency of the electrolysis reaction. The connection design between the positive copper strip 1101 and the positive copper busbar 71 ensures smooth conduction of current and reduces power loss. The overall design not only improves the performance of the electrolysis equipment, but also extends the service life of the equipment and reduces maintenance costs.

[0074] Furthermore, when the positive electrode plate 110 is installed in the ion membrane positive electrode frame 11 , the positive electrode copper strip 1101 is located at the top of the frame 111 , and the position of the BDD electrode sheet 1103 corresponds to the position of the electrolysis sensing port 115 .

[0075] When the positive electrode plate 110 is installed in the ion membrane positive electrode frame 11, the positive copper strip 1101 is located at the top of the frame 111. This design facilitates efficient current conduction. The position of the positive copper strip 1101 ensures the reliability of current transmission, thereby providing a good current source for the subsequent electrochemical reaction on the BDD electrode sheet 1103. In addition, the position of the BDD electrode sheet 1103 corresponds one-to-one with the position of the electrolysis induction port 115. Through this matching design, the uniform distribution of current and electric field radiation during the electrolysis process can be ensured. This is crucial for improving electrolysis efficiency, ensuring sufficient copper deposition, and regenerating and reusing the micro-etching tail liquid.

[0076] Specifically, a plurality of ion membrane positive electrode frames 11 are arranged at intervals in the electrolysis cylinder 10. The area of ​​each ion membrane positive electrode frame 11 is the positive electrode area, and the positive electrode plate 110 is connected to the positive electrode copper bar 71 through a fastener such as a titanium screw via a positive electrode copper bar 1101, so that the positive electrode plate 110 is suspended inside the ion membrane positive electrode frame 11. When the positive electrode area is filled with electrolyte, the positive electrode plate 110 is immersed in the electrolyte. The areas on both sides of the positive electrode area are the negative electrode area, and the negative electrode plate 120 is connected to the negative electrode copper bar 72 through a fastener such as a titanium screw, so that the negative electrode plate 120 is suspended and arranged in the negative electrode area. The electrolysis cylinder provided with the positive electrode plate and the negative electrode plate is as shown in FIG. Figure 7 As shown, the positive electrode plate 110 and the negative electrode plate 120 are spaced apart from each other.

[0077] Furthermore, the negative electrode plate 120 includes a negative copper bar 1201 and a cathode titanium plate 1202;

[0078] The area of ​​the cathode titanium plate 1202 is the same as that of the frame 111 . The top of the cathode titanium plate 1202 is connected to the negative copper bar 1201 . The negative copper bar 1201 is installed and connected to the negative copper bus 72 .

[0079] The negative electrode plate 120 consists of a negative copper strip 1201 and a cathode titanium plate 1202. The area of ​​the cathode titanium plate 1202 is the same as that of the frame 111, ensuring even current distribution in the negative region during electrolysis and improving electrolysis efficiency. The top of the cathode titanium plate 1202 is connected to the negative copper strip 1201, which in turn is connected to the negative copper busbar 72. This design shortens and makes the current transfer from the negative copper busbar 72 to the negative electrode plate 120 more direct, reducing resistance losses and enhancing conductivity during electrolysis.

[0080] Furthermore, cathode titanium plate 1202 is made of titanium, which offers excellent corrosion resistance, high strength, and low density. This allows the negative plate to maintain stable performance over extended periods of operation. Furthermore, the tight connection between negative copper strip 1201 and cathode titanium plate 1202 enhances the overall structural strength of the negative plate, improving its durability.

[0081] Furthermore, the electrolysis cylinder 10 is a cylinder body with an open top, and the cylinder body is composed of a front wall 12, a rear wall 13, a bottom wall and two side walls.

[0082] The front wall 12 is provided with a negative liquid inlet 121, and the rear wall 13 is provided with a negative liquid outlet 131. The negative liquid inlet 121 is connected to the negative liquid storage cylinder 22 via a negative liquid inlet pipe 61, and the negative liquid outlet 131 is connected to the negative liquid storage cylinder 22 via a negative liquid outlet pipe 62. The negative liquid inlet pipe 61 is provided with a negative liquid circulation pump 63. The negative liquid inlet pipe 61, the negative liquid outlet pipe 62 and the negative liquid circulation pump 63 constitute a negative liquid circulation assembly 60;

[0083] The front wall 12 and the rear wall 13 are further provided with a plurality of cathode liquid pipeline openings, the liquid guide tube 116 is connected to the cathode liquid inlet pipe 51 through the cathode liquid pipeline openings, and the cathode liquid outlet pipe 52 is connected to the cathode liquid outlet 1113 through the cathode liquid pipeline openings.

[0084] The electrolytic cylinder 10 is a cylinder body with an open top, which is convenient for holding the electrolytic reaction solution and installing the ion membrane positive electrode frame 11, the positive electrode plate 110 and the negative electrode plate 120. The cylinder body is surrounded by a front wall 12, a rear wall 13, a bottom wall 14 and two side walls. A negative electrode liquid inlet 121 is provided on the front wall 12 and a negative electrode liquid inlet 121 is provided on the rear wall 13 to facilitate the circulation of negative electrode liquid between the negative electrode liquid storage cylinder 22 and the electrolytic cylinder 10. Specifically, the negative electrode liquid inlet 121 is connected to the negative electrode liquid inlet pipe 61 ( Figure 1 and Figure 2 The purple-red pipe in the middle) is connected to the cathode liquid storage cylinder 22, and the cathode liquid outlet 131 is connected to the cathode liquid outlet pipe 62 ( Figure 2 The red pipe in the figure) is connected to the cathode liquid storage cylinder 22, forming an electrolysis cylinder 10 connected to the cathode liquid storage cylinder 22, and the cathode liquid circulation is realized by the cathode liquid circulation pump 63.

[0085] The front wall 12 is also provided with a number of cathode liquid pipeline openings. These cathode liquid pipeline openings are located on one side of the inner wall of the cylinder body and are connected to the port of the liquid guide tube 116 located on the upper part of the ion membrane positive electrode frame 11; and the cathode liquid pipeline opening is located on one side of the outer wall of the cylinder body and is connected to the cathode liquid inlet pipe 51. The other end of the cathode liquid inlet pipe 51 is connected to the cathode liquid storage cylinder 21, forming a cathode liquid supply circuit. This design ensures that the cathode liquid can enter the positive plate area in the electrolysis cylinder evenly and quickly, which helps to improve the uniformity and efficiency of the electrolysis reaction. The cylinder body is provided with a cathode liquid pipeline opening for installing the liquid guide tube 116, providing an additional mounting structure for the ion membrane positive electrode frame 11, making the ion membrane positive electrode frame 11 more stable in the electrolysis cylinder 10.

[0086] The unique design of the electrolysis cylinder 10 addresses the issues of insufficient electrolysis reaction and low regeneration efficiency found in conventional electrolysis equipment. This electrolysis equipment further improves circulation and processing efficiency, resulting in more uniform and stable copper ion deposition and effectively avoiding interference between the cathode and cathode solutions.

[0087] Furthermore, the rehydration component 80 includes a rehydration tube 81 and a control valve 82, one end of the rehydration tube 81 is connected to the negative electrode liquid circulation pump 63, and the other end of the rehydration tube 81 is connected to the positive electrode liquid storage cylinder 21, and the control valve 82 is installed on the rehydration tube 81, and the control valve 82 is used to control the opening and closing of the rehydration tube 81.

[0088] The refill assembly 80 can achieve refill balance between the cathode liquid and the cathode liquid when needed through the cooperation of the refill tube 81 and the control valve 82. Figure 2 The yellow pipe (in the figure) connects the cathode liquid circulation pump 63 and the cathode liquid storage tank 21, ensuring that the cathode liquid can be replenished into the cathode liquid storage tank 21 when the cathode liquid is insufficient. The control valve 82 is used to adjust the opening and closing of the refill pipe 81, ensuring the controllability and accuracy of the refill process. This design improves the operating stability and efficiency of the electrolysis equipment by achieving liquid balance and ensures the effective reuse of the micro-etching tail liquid.

[0089] The rehydration assembly 80 can be implemented not only with a mechanically controlled valve, but also with a variety of different valve types, such as electric valves and pneumatic valves, to achieve more precise control. Furthermore, as needed, the rehydration tube 81 can be equipped with a flow regulator or sensor to monitor and adjust the rehydration rate, further improving the system's operating efficiency and stability. The material of the rehydration tube can be selected to suit different working environments, ensuring its long-term, efficient operation with various corrosive liquids.

[0090] By using these technical means to maintain a balanced replenishment of the positive and negative electrolytes, compared to existing technologies, this not only ensures the circulation and balance of the electrolyte, improving the stability of the electrolysis process, but also helps maintain the long-term and efficient operation of the equipment, further enhancing the practical effect of micro-etching tail liquid reuse. This design not only solves the problem caused by imbalance between the positive and negative electrolytes, but also makes the electrolysis equipment more efficient and stable when handling micro-etching tail liquid, resulting in lower operating costs and more significant results for the entire system.

[0091] Furthermore, six ion membrane positive electrode frames 11 and seven negative electrode plates 120 are installed in the electrolysis cylinder 10 .

[0092] By installing six ion membrane positive electrode frames 11 (positive plates 110) and seven negative plates 120 inside the electrolysis cylinder 10, the distribution of current and electrolysis area during the electrolysis process is optimized, which helps to improve the uniformity and efficiency of the electrolysis reaction. The positive plate 110 and the negative plate 120 are installed in the positive and negative electrode regions, respectively, and form an efficient circuit system with the rectifier 30 through the positive copper bus 71 and the negative copper bus 72. When the electrolysis reaction begins, an oxidation reaction will occur in the positive electrode region, and the negative electrode region will reduce copper ions, precipitating copper and depositing it on the negative plate 120. This design not only increases the reaction rate, but also effectively avoids mutual interference between the positive and negative electrode reactions.

[0093] In practice, the micro-etching tail liquid is first introduced into the positive and negative regions of the electrolysis cylinder, where the reaction is driven by the voltage provided by the rectifier. As the electrolysis reaction proceeds, the generated gas is promptly discharged through the exhaust mechanism 40, maintaining safe and stable operation of the system.

[0094] The entire system includes independent cathode liquid storage tanks 21 and cathode liquid storage tanks 22, interconnected by a refill assembly 80 to ensure electrolyte circulation and balance. Furthermore, an external discharge assembly 9 is provided outside the cathode liquid storage tank 21. When the sodium persulfate concentration in the cathode liquid reaches a certain level, the micro-etching tail liquid in the cathode liquid storage tank 21 is "regenerated" and can be discharged to resume production.

[0095] Furthermore, it comprises a plurality of independent electrolysis cylinders 10, and the plurality of electrolysis cylinders 10 are arranged along the same straight line.

[0096] By utilizing several independent electrolytic cylinders 10 arranged along a single line, the equipment achieves a modular design, facilitating the design of shared piping. This design allows each electrolytic cylinder 10 to operate independently without interfering with each other, thereby improving the electrolysis efficiency of the entire equipment. The number and status of the independent electrolytic cylinders 10 can be flexibly adjusted based on actual demand. When production demand increases, more electrolytic cylinders can be activated to meet demand; conversely, when production demand decreases, some can be shut down to save energy and costs.

[0097] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. An electrolysis device for recycling micro-etching tail liquid, characterized by: It comprises an electrolysis cylinder (10), a cathode liquid storage cylinder (21), a cathode liquid storage cylinder (22), a rectifier (30), a cathode copper busbar (71), a cathode copper busbar (72), and an exhaust mechanism (40); A plurality of ion membrane positive electrode frames (11) are installed in the electrolysis cylinder (10), the ion membrane positive electrode frame (11) is a positive electrode area, and both sides of the ion membrane positive electrode frame (11) are negative electrode areas. A positive electrode plate (110) is installed in the ion membrane positive electrode frame (11), and a negative electrode plate (120) is installed in the negative electrode area. The positive electrode copper bar (71) and the negative electrode copper bar (72) are respectively installed on the top of the electrolysis cylinder (10), the positive electrode plate (110) is connected to the rectifier (30) through the positive electrode copper bar (71), and the negative electrode plate (120) is connected to the rectifier (30) through the negative electrode copper bar (72); The positive electrode region is in communication with the positive electrode liquid storage cylinder (21) via a positive electrode liquid circulation component, the negative electrode region is in communication with the negative electrode liquid storage cylinder (22) via a negative electrode liquid circulation system, the positive electrode liquid storage cylinder (21) is in communication with the negative electrode liquid storage cylinder (22) via a liquid replenishing component (80), and an external discharge component (9) is provided on the outside of the positive electrode liquid storage cylinder (21); The exhaust mechanism (40) is respectively connected to the electrolysis cylinder (10), the cathode liquid storage cylinder (21) and the cathode liquid storage cylinder (22) and is used for discharging gas generated during the electrolysis process.

2. The electrolysis equipment for recycling micro-etching tail liquid according to claim 1, characterized in that: The ion membrane positive electrode frame (11) comprises a frame body (111), two inner separators (112), two ion membranes (113) and two outer separators (114); The inner partition (112), the ion membrane (113) and the outer partition (114) are sequentially arranged on both sides of the frame (111) from the inside to the outside, and the inner partition (112) and the outer partition (114) are respectively provided with a plurality of electrolytic sensing ports (115), and the electrolytic sensing ports (115) of the inner partition (112) correspond to the electrolytic sensing ports (115) of the outer partition (114) one by one; The frame (111) is provided with a mounting port (1111), a positive electrode liquid inlet (1112) and a positive electrode liquid outlet (1113); the mounting port (1111), the positive electrode liquid inlet (1112) and the positive electrode liquid outlet (1113) are respectively communicated with the interior of the frame (111); the mounting port (1111) is provided at the top of the frame (111); and the mounting port (1111) is used to mount the positive electrode plate (110). The positive liquid inlet (1112) is connected to the positive liquid storage cylinder (21) via a positive liquid inlet pipe (51); the positive liquid outlet (1113) is connected to the positive liquid storage cylinder (21) via a positive liquid outlet pipe (52); the positive liquid inlet pipe (51) is provided with a positive liquid circulation pump (53); the positive liquid inlet pipe (51), the positive liquid outlet pipe (52) and the positive liquid circulation pump (53) constitute the positive liquid circulation assembly.

3. The electrolysis equipment for recycling micro-etching tail liquid according to claim 2, characterized in that: The cathode liquid inlet (1112) is provided at the lower portion of the front end of the frame (111), and the cathode liquid outlet (1113) is provided at the upper portion of the rear end of the frame (111); A liquid guide tube (116) is further provided on the outside of the frame (111), and the liquid guide tube (116) is extended along the height direction of the frame (111), and the cathode liquid inlet (1112) is connected to the cathode liquid inlet tube (51) through the liquid guide tube (116).

4. The electrolysis equipment for recycling micro-etching tail liquid according to claim 3, characterized in that: The positive electrode plate (110) comprises a positive copper bar (1101), a titanium skeleton (1102) and a plurality of BDD electrode sheets (1103); The titanium skeleton (1102) comprises a connecting main frame (11021) and two mounting sub-frames (11022), the two mounting sub-frames (11022) are arranged in parallel with each other and are respectively connected to the connecting main frame (11021), the connecting main frame (11021) is connected to the positive copper bar (1101), and the positive copper bar (1101) is mounted and connected to the positive copper busbar (71); Several BDD electrode sheets (1103) are respectively installed on the two mounting sub-racks (11022).

5. The electrolysis equipment for recycling micro-etching tail liquid according to claim 4, characterized in that: When the positive electrode plate (110) is installed in the ion membrane positive electrode frame (11), the positive electrode copper strip (1101) is located at the top of the frame (111), and the position of the BDD electrode sheet (1103) corresponds one-to-one to the position of the electrolysis sensing port (115).

6. The electrolysis equipment for recycling micro-etching tail liquid according to any one of claims 3 to 5, characterized in that: The negative electrode plate (120) comprises a negative electrode copper strip (1201) and a cathode titanium plate (1202); The area of ​​the cathode titanium plate (1202) is the same as that of the frame (111), the top of the cathode titanium plate (1202) is connected to the negative copper bar (1201), and the negative copper bar (1201) is installed and connected to the negative copper busbar (72).

7. The electrolysis equipment for recycling micro-etching tail liquid according to claim 6, characterized in that: The electrolysis cylinder (10) is a cylinder body with an open top, and the cylinder body is composed of a front wall (12), a rear wall (13), a bottom wall and two side walls. The front wall (12) is provided with a negative electrode liquid inlet (121), and the rear wall (13) is provided with a negative electrode liquid outlet (131). The negative electrode liquid inlet (121) is connected to the negative electrode liquid storage cylinder (22) via a negative electrode liquid inlet pipe (61), and the negative electrode liquid outlet (131) is connected to the negative electrode liquid storage cylinder (22) via a negative electrode liquid outlet pipe (62). The negative electrode liquid inlet pipe (61) is provided with a negative electrode liquid circulation pump (63). The negative electrode liquid inlet pipe (61), the negative electrode liquid outlet pipe (62) and the negative electrode liquid circulation pump (63) constitute a negative electrode liquid circulation assembly (60); The front wall (12) and the rear wall (13) are further provided with a plurality of cathode liquid pipeline openings, the liquid guide tube (116) is connected to the cathode liquid inlet pipe (51) through the cathode liquid pipeline openings, and the cathode liquid outlet pipe (52) is connected to the cathode liquid outlet (1113) through the cathode liquid pipeline openings.

8. The electrolysis equipment for recycling micro-etching tail liquid according to claim 7, characterized in that: The rehydration assembly (80) includes a rehydration tube (81) and a control valve (82), one end of the rehydration tube (81) is connected to the cathode liquid circulation pump (63), and the other end of the rehydration tube (81) is connected to the cathode liquid storage cylinder (21), and the control valve (82) is installed on the rehydration tube (81), and the control valve (82) is used to control the opening and closing of the rehydration tube (81).

9. The electrolysis equipment for recycling micro-etching tail liquid according to claim 8, characterized in that: Six ion membrane positive electrode frames (11) and seven negative electrode plates (120) are installed in the electrolysis cylinder (10).

10. The electrolysis equipment for recycling micro-etching tail liquid according to any one of claims 7 to 9, characterized in that: It comprises a plurality of independent electrolysis cylinders (10), wherein the plurality of electrolysis cylinders (10) are arranged along the same straight line.

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