Electrolyte filter

Abstract

The utility model discloses an electrolyte filter relates to the field of electrolyte filtration technology, which includes the cylinder, installs the top cover at the opening of cylinder, is located in the filter core in the cylinder, still includes the purging mechanism, the purging mechanism includes purging pipeline, installs purging control valve and purging built -in spare on purging pipeline, the purging built -in spare is located in the cylinder and includes the central tube and two gas -drawing pipes, the central tube inserts the filter core and the lateral wall sets up a plurality of pinholes, the gas -drawing pipe one end is located outside the central tube, and the other end inserts the central tube and extends along the length direction of central tube, the purging pipeline is communicated with the central tube and is passed into the top cover, one end of purging pipeline is located outside the cylinder and is communicated with the pump. The application has the effect that the filter can be efficiently cleaned without disassembling the filter, the maintenance efficiency of the electrolyte filter can be improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of electrolyte filtration technology, and in particular to an electrolyte filter. Background Technology

[0002] The core component of the alkaline water electrolysis hydrogen production device is the electrolyzer, which is composed of multiple circular plates connected in series. Small chambers are formed between adjacent circular plates, and the chambers are separated by a diaphragm. The cathode and anode electrodes are also located on both sides of the diaphragm. At the same time, there is a 30% KOH solution in the chamber. During operation, hydrogen and oxygen are generated at the cathode and anode on both sides of the diaphragm by electrolyzing this solution.

[0003] Due to its unique structure, the electrolytic cell requires a high degree of cleanliness for the electrolyte. If impurities enter the cell, they may adhere to the electrodes, affecting their performance, or deposit on the diaphragm, impacting its permeability and creating "parasitic electrodes" that affect the purity of hydrogen and oxygen. Therefore, a filter is typically installed before the electrolyte enters the cell to remove any impurities and ensure the cleanliness of the electrolyte entering the cell.

[0004] An electrolyte filter is a device specifically designed to filter impurities in electrolytes. Its core function is to remove contaminants such as solid particles, colloids, and metal debris from the electrolyte to ensure its purity, thereby improving the stability of related production processes and product quality.

[0005] Reference Figure 1 Most existing electrolyte filters are basket filters, mainly composed of a cylinder and a filter element. The electrolyte enters the filter through the inlet, which connects to the space between the cylinder and the outside of the filter element. The electrolyte flows out of the filter through the outlet, which connects to the space between the cylinder and the inside of the filter element. This allows the electrolyte to pass through the filter element while filtering impurities onto the outside. The filter can be drained periodically by opening the drain port. Although the drain mainly removes impurities that have settled naturally inside the filter, some impurities also accumulate on the surface of the filter element. These impurities are difficult to remove with simple draining, so it is often necessary to periodically open the filter, remove the filter element, rinse it repeatedly with water, and then reinstall it for use.

[0006] Because the filter housing is sealed by a large flange cover and has a large number of fixing bolts, each disassembly involves: removing the flange cover bolts - removing the flange cover - removing the fixing bolts of the filter element - taking out the filter element - rinsing - installing the filter element and its fixing bolts - replacing the flange cover - putting the flange cover back - tightening the bolts. The whole process is time-consuming and labor-intensive, which increases maintenance costs to some extent.

[0007] Therefore, a new technical solution is proposed. Utility Model Content

[0008] In order to improve the maintenance efficiency of electrolyte filters and reduce maintenance costs, this application provides an electrolyte filter.

[0009] This application provides an electrolyte filter, which adopts the following technical solution:

[0010] An electrolyte filter includes a cylinder, a top cover installed at the opening of the cylinder, a filter element located inside the cylinder, and a purging mechanism. The purging mechanism includes a purging pipe, a purging control valve installed on the purging pipe, and a purging internal component. The purging internal component is located inside the cylinder and includes a central tube and two air inlet pipes. The filter element is a hollow tube with an open end near the top cover that extends horizontally and is fixed to the cylinder, while the other end is relatively closed. The area below the horizontal extension of the filter element is the external space of the filter element, and the area inside the filter element and above the horizontal extension is the internal space of the filter element. The central tube is inserted into the filter element and has multiple fine holes on its sidewall. One end of the air inlet pipe is located outside the central tube, and the other end is inserted into the central tube and extends along the length of the central tube. The purging pipe passes through the top cover and is connected to the central tube. The end of the purging pipe outside the cylinder is connected to a pump, and the end of the cylinder away from the top cover is connected to a drain pipe with a drain valve installed on it.

[0011] Optionally, the side wall of the cylinder is connected to an inlet pipe and an outlet pipe. An inlet valve is installed on the inlet pipe, and an outlet valve is installed on the outlet pipe. The inlet pipe is connected to the external space of the cylinder and the filter element, and the outlet pipe is connected to the internal space of the cylinder and the filter element. A bypass pipe is connected between the end of the outlet pipe away from the cylinder and the end of the purge pipe away from the cylinder, and the bypass pipe is equipped with a bypass valve.

[0012] Optionally, the central tube is divided into a thick section and a thin section along its length. The thick section is connected to the air intake tube, and the thin section is provided with fine holes and has a blind plate for sealing away from the thick section.

[0013] Optionally, the upper end of the air intake tube is fitted with a sleeve to prevent blockage. The sleeve extends through the top cover and is slidably connected to the outside of the top cover. A sleeve blind plate is provided at the upper end of the sleeve. A corrugated pipe is provided on the top cover to connect to the sleeve. One end of the corrugated pipe is fixed to the top cover, and the other end is fixed to the outer wall of the sleeve. An electric actuator is provided on the sleeve to drive the sleeve to rise and fall.

[0014] Optionally, a self-resetting switch is provided above the sleeve, and the self-resetting switch is electrically connected to the PLC controller.

[0015] Optionally, the end of the sewage pipe away from the cylinder is connected to an elbow, and the elbow has at least two inflection points with the inflection points facing opposite directions.

[0016] Optionally, a liquid level sensor is installed on the side wall of the cylinder near the top cover, and the liquid level sensor is electrically connected to the PLC controller.

[0017] In summary, this application includes the following beneficial technical effects: When cleaning is required, only the inlet and outlet valves need to be closed, and a portion of the liquid is discharged through the drain pipe. Then, the liquid can be sent into the cylinder through the central tube of the purging internal component. At this time, the air intake pipe can draw in the gas above the cylinder, inflating the liquid in the central tube, and finally spraying the liquid out from the fine holes as water droplets, achieving a large spray rinsing with a small liquid flow. This design can avoid liquid waste and achieve efficient purging. On the other hand, the introduction of gas makes the flow state of the sprayed liquid more irregular, and when it impacts the inner wall of the filter element, the impurities on the outside of the filter element are more easily dislodged. As can be seen from the above, this application can efficiently clean the internal filter element without disassembling the filter, which can improve the maintenance efficiency of the electrolyte filter and reduce maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of existing technology for electrolyte filters.

[0019] Figure 2 This is a structural diagram of this application.

[0020] Figure 3 This is a schematic diagram of the structure of the elbow on the sewage pipe in this application.

[0021] Figure 4 This is a structural schematic diagram of the purge built-in component in this application.

[0022] Figure 5 This is a sectional view of the upper part of the top cover in this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Cylinder; 2. Top cover; 3. Filter element; 4. Inlet pipe; 41. Inlet valve; 42. Inlet pipe flow meter; 5. Outlet pipe; 51. Outlet valve; 52. Outlet pipe flow meter; 6. Drain pipe; 61. Drain valve; 62. Elbow; 7. Purge pipe; 71. Purge control valve; 8. Purge internal components; 81. Central tube; 811. Blind flange; 82. Air vent pipe; 83. Sleeve; 84. Sleeve blind flange; 85. Corrugated pipe; 86. Electric actuator; 87. Self-resetting switch; 88. Liquid level sensor; 9. Bypass pipe; 91. Bypass valve; 10. Pump; 11. Frequency converter; 12. PLC controller; 13. Protective cover. Detailed Implementation

[0024] The following is in conjunction with the appendix Figures 2-5 This application will be described in further detail below.

[0025] This application discloses an electrolyte filter.

[0026] Reference Figure 2 The electrolyte filter includes a cylinder 1 and a top cover 2 installed at the opening of the cylinder 1. The main body of the cylinder 1 is hollow and cylindrical with one end closed. The main view of the closed end is elliptical. The opening end of the inner cavity of the cylinder 1 is the aforementioned opening. The top cover 2 is fixed by welding. The top cover 2 can be extended from the side of the cylinder 1 and has a flange structure to facilitate its connection with other structures and realize the installation of this application.

[0027] Inside the cylinder 1, a filter element 3 is installed along the same central axis. In this embodiment, the filter element 3 is shaped like a hollow tube, with one end near the top cover 2 being open and extending horizontally to be fixed to the cylinder 1, while the other end is relatively closed. The area below the horizontal extension of the filter element 3 is the external space of the filter element 3, and the area inside the filter element 3 and above the horizontal extension is the internal space of the filter element 3. It can be understood that the sidewalls and bottom of the filter element 3 have a large number of microporous structures.

[0028] The side wall of the cylinder 1 is connected to an inlet pipe 4 and an outlet pipe 5. The inlet pipe 4 connects to the external space of the filter element 3, and the outlet pipe 5 connects to the internal space of the filter element 3. Liquid flows into the cylinder 1 from the inlet pipe 4, is filtered by the filter element 3, and then flows out from the outlet pipe 5, thereby achieving the purpose of filtering impurities in the liquid (i.e., electrolyte). An inlet valve 41 is installed at the end of the inlet pipe 4 near the cylinder 1, and an outlet valve 51 is installed at the end of the outlet pipe 5 near the cylinder 1.

[0029] The bottom of the cylinder 1 is connected to a drain pipe 6, and a drain valve 61 is installed on the drain pipe 6. Impurities that do not pass through the filter element 3 will settle at the bottom of the cylinder 1. When there are a lot of impurities, the drain valve 61 can be opened to allow the impurities to flow out through the drain pipe 6, thereby removing the impurities.

[0030] It is understandable that the inlet valve 41, outlet valve 51 and drain valve 61 mentioned above are connected to the pipeline via flange structures on the side near the cylinder, so as to achieve the effect of high-strength sealing and flexible disassembly.

[0031] Reference Figure 3 In one embodiment of this application, the end of the sewage pipe 6 away from the cylinder 1 is connected to a bend 62, which has at least two inflection points and the inflection points face opposite directions; taking two inflection points as an example, it is roughly "S" shaped.

[0032] Elbow 62 is a water trap in the sewage pipe 6. When the sewage valve 61 is opened, a large amount of water will be discharged at once. The water flow is very fast and will generate a siphon effect to carry away all the water in the water trap, thus playing the role of rapid sewage discharge.

[0033] In another embodiment of this application, reference is made to Figure 2 A flange structure is formed at the center of the top cover 2 and is sealed to it with a purge pipe 7. A purge control valve 71 is installed on the purge pipe 7 near the top cover 2. A purge built-in component 8 is set inside the cylinder 1. The purge pipe 7 is connected to the purge built-in component 8 inside the cylinder 1. The purge built-in component 8 is welded and fixed to the top cover 2 through a pre-matched base.

[0034] A pump 10 is connected to the end of the purging pipe 7 away from the cylinder 1. The pump 10 is equipped with a frequency converter 11 and a controller 12. The pump 10 is electrically connected to the frequency converter 11, and the frequency converter 11 is electrically connected to the PLC controller 12. This allows the operator to control the frequency converter 11 through the PLC controller 12 to adjust the power of the pump 10 and change the liquid flow rate.

[0035] refer to Figure 4 The aforementioned purge-integrated component 8 includes a central tube 81 and an air intake tube 82. One end of the central tube 81 is fixed to the purge pipe 7, and the other end is inserted into the filter element 3 and aligned with the central axis. One end of the air intake tube 82 is located outside the central tube 81, and the other end is inserted into the central tube 81 and extends downward. The position where the air intake tube 82 is inserted into the central tube 81 is located near the top cover 2, and the outer section of the air intake tube 82 extends vertically upward. A large number of fine holes are provided on the side wall below the connection point of the central tube 81 and the air intake tube 82. The end of the central tube 81 away from the top cover 2 is sealed with a blind plate 811.

[0036] Specifically, the central tube 81 is divided into a thick section and a thin section in the length direction. The thick section is connected to the air intake tube 82, and the thin section is the part away from the top cover 2. A gradual diameter change is formed at the connection between the thick section and the thin section.

[0037] As described above, this application allows for the following: When cleaning is required, simply close the inlet valve 41 and outlet valve 51, and use the drain pipe 6 to discharge a portion of the liquid. Then, the liquid can be fed into the cylinder 1 through the central tube 81 of the purge unit 8. At this time, the air intake pipe 82 can draw in gas from the upper part of the cylinder 1, aerating the liquid in the central tube 81. Finally, the liquid is sprayed out as water droplets through the fine holes, achieving a large spray rinsing with a relatively small liquid flow. This design avoids liquid waste and achieves efficient purging. Furthermore, the introduction of gas makes the flow of the sprayed liquid more irregular, making it easier for impurities on the outside of the filter element to fall off when impacting the inner wall of the filter element.

[0038] In another embodiment of this application, reference is made to Figure 4 and Figure 5The upper end of the air duct 82 of the purge built-in component 8 is fitted with a sleeve 83. The sleeve 83 penetrates the top cover 2 and extends to the outside of the top cover 2 and is slidably connected to the top cover 2. The uppermost end of the sleeve 83 is sealed with a sleeve blind plate 84.

[0039] The upper part of the top cover 2 is provided with a corrugated pipe 85 that connects to the sleeve 83, with one end of the corrugated pipe 85 fixed to the top cover 2 and the other end fixed to the outer wall of the sleeve 83. An electric actuator 86 is also provided on the side of the sleeve 83, with its extension and retraction direction parallel to the sleeve 83. The main body of the electric actuator 86 is fixed to the top cover 2, and a laterally extending connecting rod is fixed to the end of the actuator to fix the sleeve 83. A lateral connecting rod is fixedly connected at the upper end of the two sleeves 83 to control their synchronous lifting and lowering.

[0040] Based on the above configuration: when the sleeve 83 needs to move up and down within the hole, a gap must exist between the sleeve 83 and the hole wall (otherwise, it cannot move). The bellows 85 itself is an elastic tube with annular pleats, which can expand and contract synchronously with the up and down movement of the tube. It does not hinder the displacement of the tube, and the gap can be completely sealed by fixing at both ends to prevent leakage of liquid inside the cylinder 1. The electric actuator 86 drives the screw / gear structure through a motor, and the lifting and lowering of the sleeve 83 can be controlled by the PLC controller 12. When cleaning the filter element 3, the electric actuator 86 drives the sleeve 83 to move upward, exposing the port of the air inlet pipe 82. When not cleaning, the sleeve 83 completely covers the port of the air inlet pipe 82, which prevents the air inlet pipe from being blocked by impurities. As can be seen from the above, this application can efficiently clean the internal filter element without disassembling the filter, which can improve the maintenance efficiency of the electrolyte filter and reduce maintenance costs.

[0041] Understandably, if the electrolyte is a corrosive solution (such as a 30% KOH solution), then the bellows material needs to be corrosion-resistant, and an alloy bellows with a corrosion-resistant coating is required. If the internal pressure is too high and exceeds the pressure resistance of the existing metal bellows, it can be replaced with a telescopic sleeve structure with a sealed end.

[0042] In another embodiment of this application, an inlet pipe flow meter 42 is installed on the inlet pipe 4 to detect the flow rate of the liquid flowing into the cylinder 1. An outlet pipe flow meter 52 is installed on the outlet pipe 5 to detect the flow rate of the liquid flowing out of the cylinder 1.

[0043] In another embodiment of this application, a bypass pipe 9 is connected to the outlet pipe 5, and the other end of the bypass pipe 9 is connected to the purge pipe 7, with the connection point located at the end of the purge control valve 71 away from the top cover 2. A bypass valve 91 is installed on the bypass pipe 2, which is as follows: Figure 2 As shown.

[0044] Specifically, when equipment on the main pipeline (i.e., inlet pipe 4, outlet pipe 5, sewage pipe 6, and purging pipe 7) malfunctions and requires maintenance, the bypass valve 91 is slowly opened to allow liquid to gradually flow into the bypass pipe. At this time, the main pipeline is still running, and the pressure and flow differences between the bypass pipe 9 and the main pipeline are gradually balanced through "small-flow diversion." Next, the upstream and downstream isolation valves of the equipment to be maintained on the main pipeline, such as inlet valve 41 and outlet valve 51, are completely closed to ensure the equipment is completely disconnected from the system before maintenance is performed on the isolated equipment. During this time, the system medium continues to flow through the bypass pipe 9, without affecting overall operation. After maintenance, the upstream and downstream isolation valves of the equipment to be maintained on the main pipeline are slowly opened to allow liquid to gradually flow back to the main equipment to balance pressure and avoid shocks, while simultaneously observing the equipment's operating status. Then, the bypass valve 91 is slowly closed. Once the flow and pressure in the main pipeline return to normal, the bypass valve 91 is completely closed, and the system returns to its original operating path. By using bypass pipe 9, continuous operation of the system can be ensured, system shutdown and overload caused by excessive motor starting current can be avoided, and the reliability of the system and the safety of maintenance can be improved.

[0045] In another embodiment of this case, a liquid level sensor 88 is installed on the side wall of the cylinder 1 near the top cover 2. Its main body is fixed to the top cover 2, and the detection part extends into the inside of the top cover 2 to sense the liquid level in the cylinder 1. The liquid level sensor 88 is electrically connected to the PLC controller 12.

[0046] Based on the above, the operator can configure the PLC controller 12 so that if the liquid level detected by the liquid level sensor 88 drops to a preset cleaning trigger threshold, the electric actuator will pull the sleeve 83 upward, closing the inlet valve 41 and opening the purge control valve 71 and the pump 10. It is understood that the above can also be achieved manually by the operator controlling the PLC controller 12.

[0047] Furthermore, a self-reset switch 87 is provided above the sleeve 83. An example of the self-reset switch 87 is shown below.

[0048] A vertical mounting rod is fixed on the top cover 2, and a horizontal plate is fixed on the mounting rod. The self-reset switch 87 is installed at the bottom of the horizontal plate with the pressing surface facing the top cover 2. The self-reset switch 87 is electrically connected to the PLC controller 12.

[0049] Based on the above settings, the operator can configure the PLC controller 12 to:

[0050] If a signal is received from the self-reset switch 87 back to the PLC controller 12 (i.e., the signal generated when the sleeve 83 moves up and presses the self-reset switch 87), then the electric push rod 83 is stopped.

[0051] Subsequently, if the liquid level detection value fed back by the liquid level sensor 88 rises to the preset full liquid level trigger threshold, it is determined that one flushing is completed. At this time, the electric push rod 86 can be reset to drive the sleeve 83 to descend again and cover the upper end of the air venting tube 82.

[0052] It is understandable that the above can also be manually controlled by staff throughout the process, with the liquid level detection value provided for observation and judgment of the working nodes; the electric actuator 86 can be controlled by the corresponding drive controller and driver program, which is existing technology and will not be described in detail here.

[0053] Furthermore, above the top cover 2 is a protective cover 13 consisting of a cover sleeve 83, a corrugated pipe 85, an electric actuator 86, and a self-resetting switch 87. The top center of the cover has an opening corresponding to the direction of the purge pipe 7, and the opening diameter is adapted to the outer diameter of the pipe, ensuring that the purge pipe 7 can pass through the opening. In addition, for ease of equipment maintenance, the protective cover 13 can be a split structure, using snap-fit ​​or bolt connections. Disassembly only requires loosening the snap-fit ​​or unscrewing a few fixing bolts to separate the cover and expose the entire equipment for maintenance. The protective cover 13 protects the devices exposed above the top cover 2, extending the equipment's service life and improving operational stability.

[0054] When in use, the operator configures the PLC controller 12 to operate in the following manner:

[0055] If the filter element 3 has a lot of impurities during use, it needs to be cleaned.

[0056] At this point, the PLC controller 12 issues a command to close the filter inlet valve 41 and outlet valve 51, while simultaneously slowly opening the drain valve 61 to slightly discharge some impurities from the bottom. This process also appropriately reduces the liquid level and pressure inside the filter, creating a partial gas space at the top of the filter. Then, the filter drain valve 61 is closed, and the purge control valve 71 is opened.

[0057] Next, the frequency converter 11 is controlled to adjust the speed of the pump 10 to control the liquid flow rate to meet the cleaning requirements. The sleeve 83 is raised by the electric actuator 86, moving it away from the vent pipe 82. Due to the self-resetting switch 87, the electric actuator 86 stops when the sleeve 83 rises to the point of contact with it. Because the corrugated pipe 85 is fixed between the vent pipe 82 and the top cover 2, the pressurized alkaline solution will not flow out from the openings in the top cover 2.

[0058] During cleaning, when pressurized alkaline solution flows into the central tube 81 through the purge control valve 71, the flow velocity increases due to the narrowing of the flow channel at the diameter change point of the central tube 81, generating a Bernoulli effect. This causes a pressure drop at the diameter change point, creating a negative pressure. This negative pressure, combined with the air intake pipe 82 located inside the central tube 81, draws gas from the space above the filter into the central tube 81 through the air intake pipe 82. The gas mixes with the alkaline solution and is sprayed out through the fine holes, impacting the inner side of the filter element 3, thus achieving a cleaning effect. The intake of air from above is equivalent to aerating the liquid, breaking the liquid sprayed from the fine holes into intermittent droplets. This achieves a large spray rinsing volume with a small liquid flow rate. On the one hand, it avoids wasting alkaline solution and achieves efficient purging; on the other hand, the introduction of gas makes the flow of the sprayed liquid more irregular, making it easier for impurities on the outside of the filter element 3 to detach when impacting the inner wall of the filter element 3.

[0059] In addition, the rinsing process is also a process of injecting liquid into the cylinder 1. Therefore, as the pressure inside the cylinder 1 increases, no more liquid will enter the cylinder 1 through the purge control valve 71, which is considered as the rinsing being completed. At this time, the liquid level detection value fed back by the liquid level sensor 88 rises to the preset full liquid level trigger threshold, which is determined to be the completion of one rinsing. Then, the liquid level sensor 88 sends a signal to the PLC controller 12, and the PLC controller 12 sends a command to control the electric push rod 86 to reset, so that the sleeve 83 can be lowered again to cover the upper end of the air inlet pipe 82. Then, the purge control valve 71 is closed and the drain valve 61 is opened. The impurities that have been purged off can be quickly discharged through the siphon effect generated by the elbow 62. Then, the drain valve 61 is closed, the filter inlet valve 41 and the outlet valve 51 are opened, and the bypass valve 91 is closed, thus completing the cleaning of the filter.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electrolyte filter, comprising a cylindrical body (1), a top cover (2) installed at the opening of the cylindrical body, and a filter element (3) located inside the cylindrical body, characterized in that: It also includes a purging mechanism, which includes a purging pipe (7), a purging control valve (71) installed on the purging pipe, and a purging built-in component (8). The purging built-in component (8) is located in the cylinder (1) and includes a central tube (81) and two air intake tubes (82). The filter element (3) is a hollow tube with one end near the top cover (2) open and extending horizontally to be fixed to the cylinder (1), and the other end is relatively closed. The area below the horizontal extension of the filter element (3) is the external space of the filter element (3), and the area inside the filter element (3) and above the horizontal extension is the internal space of the filter element (3). The central tube (81) is inserted into the filter element (3) and has multiple fine holes on its side wall. One end of the air intake tube (82) is located outside the central tube (81), and the other end is inserted into the central tube (81) and extends along the length of the central tube (81). The purge pipe (7) passes through the top cover (2) and is connected to the central tube (81). One end of the purge pipe (7) located outside the cylinder (1) is connected to a pump (10). One end of the cylinder (1) away from the top cover (2) is connected to a drain pipe (6). A drain valve (61) is installed on the drain pipe (6).

2. The electrolyte filter according to claim 1, characterized in that: The side wall of the cylinder (1) is connected to an inlet pipe (4) and an outlet pipe (5). An inlet valve (41) is installed on the inlet pipe (4), and an outlet valve (51) is installed on the outlet pipe (5). The inlet pipe (4) is connected to the external space of the cylinder (1) and the filter element (3), and the outlet pipe (5) is connected to the internal space of the cylinder (1) and the filter element (3). A bypass pipe (9) is connected between the end of the outlet pipe (5) away from the cylinder (1) and the end of the purge pipe (7) away from the cylinder (1). A bypass valve (91) is provided on the bypass pipe (9).

3. The electrolyte filter according to claim 1, characterized in that: The central tube (81) is divided into a thick tube section and a thin tube section in the length direction. The thick tube section is connected to the air intake tube (82). The thin tube section is provided with a fine hole, and the thin tube is far away from the thick tube section and has a blind plate (811) for sealing.

4. The electrolyte filter according to claim 1, characterized in that: The upper end of the air intake tube (82) is fitted with a sleeve (83) for preventing blockage. The sleeve (83) extends through the top cover (2) and is slidably connected to the outside of the top cover (2). A sleeve blind plate (84) is provided at the upper end of the sleeve (83). A corrugated pipe (85) is provided on the top cover (2) to connect to the sleeve (83). One end of the corrugated pipe (85) is fixed to the top cover (2), and the other end is fixed to the outer wall of the sleeve (83). An electric push rod (86) is provided on the sleeve (83) for driving the sleeve to rise and fall.

5. The electrolyte filter according to claim 4, characterized in that: A self-reset switch (87) is provided above the sleeve (83), and the self-reset switch (87) is electrically connected to the PLC controller (12).

6. The electrolyte filter according to claim 1, characterized in that: The sewage pipe (6) is connected to a bend (62) at the end away from the cylinder (1), and the bend (62) has at least two inflection points and the inflection points face opposite directions.

7. The electrolyte filter according to claim 6, characterized in that: A liquid level sensor (88) is installed on the side wall of the cylinder (1) near the top cover (2), and the liquid level sensor (88) is electrically connected to the PLC controller (12).

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