High-purity washing device and method for non-metal normal-pressure gas-liquid separator

Abstract

The invention discloses a high-purity washing device and method for a non-metal normal-pressure gas-liquid separator, and relates to the technical field of hydrogen production, the high-purity washing device comprises a separation tank, the separation tank is a gas-liquid separator body used for separating hydrogen and electrolyte in a water electrolysis hydrogen production system, and the separation tank is made of a non-metal material; by arranging parts such as a cleaning intubation tube, a drainage intubation tube, a closed piston, a guide tooth row, a linkage valve plate, a flexible air pipe and a sealing air bag, the piston is pushed to move backwards through insertion of the intubation tube, and then the matching relation of mechanical linkage of the tooth row, a gear and a bevel gear and air path linkage of the air pipe air bag is driven; the linkage valve plate can automatically rotate to close a production flow path through transmission of a gear pair, and meanwhile, the sealing air bag can automatically expand to seal an insertion gap through air pressure transfer. The effect that an independent and closed high-purity cleaning loop which is completely physically isolated from a hydrogen production system in operation is constructed for the separator to be cleaned is achieved.

Description

High-purity washing device and method for non-metallic atmospheric pressure gas-liquid separator Technical Field

[0001] This invention relates to the field of hydrogen production technology, specifically to a high-purity washing device and method for non-metallic atmospheric pressure gas-liquid separators. Background Technology

[0002] Electrolysis of water is an important industrial method for producing high-purity hydrogen (purity can reach over 99%). During electrolysis, hydrogen is produced at the cathode and oxygen (or chlorine) at the anode. The generated hydrogen often forms a gas-liquid mixture with the electrolyte (such as potassium hydroxide, sodium hydroxide, or sodium chloride solution). To obtain pure hydrogen, a gas-liquid separator must be used to separate the mixture. Gas-liquid separators made of non-metallic materials (such as FRP, PP, PVC, etc.) are widely used in corrosive electrolyte environments due to their excellent corrosion resistance, lightweight, and cost advantages. However, during continuous operation, salts, alkalis, and trace impurities in the electrolyte will gradually adhere, crystallize, or deposit inside the separator, especially in the airflow channels (such as exhaust pipes) and inner walls. These residues not only reduce separation efficiency but also directly contaminate the subsequently produced hydrogen, causing its purity to decrease and failing to meet the requirements of high-purity applications such as fuel cells and the electronics industry. Therefore, the separator must be cleaned regularly and thoroughly.

[0003] Based on the aforementioned existing technologies, the industry currently generally cleans separators by shutting down and disassembling them, that is, removing the separator entirely from the hydrogen production line and then rinsing it with external spray equipment. This method has obvious drawbacks: First, it severely interrupts production: the disassembly and installation process forces the entire hydrogen production system to shut down, directly affecting hydrogen production capacity and continuity. Second, the cleaning effect and purity are not guaranteed: disassembly-based cleaning may not be able to reach all the complex internal flow channels, leaving cleaning dead spots, resulting in incomplete removal of impurities and affecting the initial hydrogen purity after production resumes. Third, the operation is cumbersome and risky: frequent disassembly and assembly operations can easily cause mechanical damage or fatigue to equipment interfaces and seals, introducing leakage risks, shortening the service life of the equipment under harsh operating conditions, and increasing maintenance costs and safety risks. Fourth, the degree of automation is low: it cannot achieve linkage control with the hydrogen production system and is difficult to integrate into automated production processes.

[0004] Therefore, we propose a high-purity washing device and method for non-metallic atmospheric pressure gas-liquid separators to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide a high-purity washing device and method for non-metallic atmospheric pressure gas-liquid separators, in order to solve the problems in the prior art mentioned in the background, which are cumbersome to operate and have risks: frequent disassembly and assembly operations can easily cause mechanical damage or fatigue to equipment interfaces and seals, introduce leakage risks, shorten the service life of equipment under harsh operating conditions, and increase maintenance costs and safety risks.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-purity washing device and method for a non-metallic atmospheric pressure gas-liquid separator, comprising a separation tank, wherein the separation tank is the main body of a gas-liquid separator used to separate hydrogen gas and electrolyte in a water electrolysis hydrogen production system, and is made of non-metallic material; a separation mechanism for separating gas and liquid from a mixture of hydrogen gas and electrolyte is fixedly connected inside the separation tank; a pressure relief mechanism for depressurizing the inside of the separation tank is also fixedly connected to the bottom end of the separation tank; a sealing mechanism is installed inside the separation mechanism; a linkage mechanism is installed at the rear end of the sealing mechanism; and a linkage mechanism is fixedly connected to the outer wall of the separation tank. The device has a fixing mechanism; a washing mechanism is fixedly connected to the front end of the fixing mechanism; the washing mechanism has a normal operating state of the separator located outside the separation mechanism, and an online cleaning state inserted inside the separation mechanism; when the fixing mechanism drives the washing mechanism to move towards the separation tank side, so that the washing mechanism is in the state of being inserted inside the separation mechanism, the linkage mechanism operates synchronously to switch the production flow path in the separation mechanism to a closed state, and make the washing mechanism form a sealed cleaning circuit, thereby performing high-purity washing inside the gas-liquid separator without interrupting the hydrogen production process, so as to maintain the purity of hydrogen production.

[0007] Preferably, the fixing mechanism includes a connecting support plate, a guide rail, an adjusting push rod, a connecting support, and a connecting arm. Two connecting support plates are symmetrically fixed at the left and right ends of the separation tank. The guide rail is fixed to the outer wall of the connecting support plate, and a transverse groove is formed inside the guide rail. The adjusting push rod is fixedly disposed within the transverse groove in the guide rail. The connecting support is slidably disposed within the guide rail, and one end of the connecting support is fixedly connected to the adjusting push rod. The connecting arm is fixedly disposed on the outer wall of the connecting support. The adjusting push rod is used to push the connecting support and the connecting arm to move along the guide rail.

[0008] Preferably, the washing mechanism includes a mounting base plate, a washing tank, a pressure relief guide plate, an adjusting screw, an ejector baffle, a return pipe, a return pump, a supply pipe, a supply pump, a cleaning pipe, a drain pipe, and a sealing airbag. The mounting base plate is fixedly disposed at the front end of two connecting arms. The washing tank is fixedly disposed at the front end of the mounting base plate and is filled with washing liquid. The pressure relief guide plate is fixedly disposed at the bottom end of the mounting base plate and has a screw hole inside. The adjusting screw is screwed into the screw hole in the pressure relief guide plate. The ejector baffle is fixedly disposed at the rear end of the adjusting screw. The front end of the adjusting screw is fixedly connected to a knob. The return pipe is fixedly installed at the top of the washing tank and communicates with the washing tank. The return pump is fixedly installed on the outer wall of the return pipe. The supply pipe is fixedly installed at the top of the washing tank and communicates with the washing tank. The supply pump is fixedly installed on the outer wall of the supply pipe. The supply pump is used to draw liquid from the inside of the washing tank. The cleaning tube and the drain tube are linearly arrayed and fixedly installed in the mounting base. There are two sealing airbags, which are respectively fixedly installed on the outer walls of the cleaning tube and the drain tube.

[0009] Preferably, the pressure relief mechanism includes a pressure relief pipe, a discharge pipe, a sealing piston, a spring rod, and a limiting guide rod. The pressure relief pipe has an L-shaped structure and is fixedly installed at the bottom end of the separation tank. The discharge pipe is fixedly installed at the bottom end of the outer circumference of the pressure relief pipe and communicates with it. The sealing piston is movably installed inside the pressure relief pipe. The front end of the spring rod is fixedly installed at the front end of the sealing piston. The limiting guide rod is fixedly installed at the front end of the spring rod and extends forward out of the pressure relief pipe. The limiting guide rod matches the adjusting screw and the adjusting ejector baffle. When the ejector baffle is in the state of pushing the limiting guide rod backward, the spring rod is in a state of compression and contraction by the sealing piston and the limiting guide rod. At this time, the sealing piston is in a state of increased repulsive force from the spring rod, that is, the pressure required for pressure relief inside the pressure relief pipe increases.

[0010] Preferably, the separation mechanism includes an inlet pipe, an outlet pipe, an exhaust pipe, and a filter holder. The inlet pipe is fixedly installed at the top right side of the separation tank and is used to receive the hydrogen-electrolyte mixture from the electrolyzer. The outlet pipe is located at the bottom end of the inlet pipe and is used to supply liquid into the separation tank. The exhaust pipe has a U-shaped structure, with the right end inlet located inside the separation tank and the left end outlet extending upwards out of the separation tank to output the separated hydrogen. The filter holder is fixedly installed at the front end of the exhaust pipe and is used to intercept and separate residual electrolyte droplets in the hydrogen.

[0011] Preferably, the sealing mechanism includes a washing conduit, a sealing piston, a guide rod, a return spring, a flexible air tube, and a guide gear rack. The washing conduit has two locations, each fixedly installed at the top extension of the inlet pipe and the outlet pipe, respectively. The sealing piston is movably disposed within the washing conduit. The guide rod is fixedly installed at the rear end of the sealing piston, extending rearward through the rear wall of the washing conduit. One end of the return spring is fixedly installed at the rear end of the sealing piston, and the other end is fixedly connected to the rear end of the inner wall of the washing conduit. A flexible air tube is also fixedly connected to the inner side of the sealing piston and the washing conduit. The flexible air tube is used to shield the return spring and the guide rod, and is filled with gas. The guide gear rack is fixedly installed at the rear end of the guide rod.

[0012] Preferably, the linkage mechanism includes a connecting bracket, a linkage valve plate, a driven bevel gear, a rotating shaft, a driven gear, a driving bevel gear, and a gas guide pipe. Two connecting brackets are provided, arranged in a linear array and fixedly positioned at the rear ends of the liquid inlet pipe and the exhaust pipe. Two linkage valve plates are provided, rotatably positioned within the liquid inlet pipe and the exhaust pipe respectively, used to cut off the hydrogen production flow path during cleaning. Driven bevel gears are fixedly connected to the rear ends of both linkage valve plates. The rotating shaft is rotatably positioned within the connecting bracket. The driven gear is fixedly positioned at the bottom end of the rotating shaft, and the driving bevel gear is fixedly positioned at the top end of the rotating shaft. The driven gear meshes with the guide gear set for transmission, and the driving bevel gear meshes with the driven bevel gear for transmission. One end of the gas guide pipe is fixedly connected to a flexible gas tube, and the other end is fixedly connected to a sealing gasbag.

[0013] Preferably, when the cleaning cannula and the draining cannula are inserted into the inlet pipe and the vent pipe respectively, the sealing piston is in a rearward movement state. When the sealing piston is in a rearward movement state, the guide rod is in a state of meshing transmission with the driven gear through the guide gear row.

[0014] Preferably, when the guide gear is in a meshing transmission state with the driven gear, the driving bevel gear is in a state of being driven to rotate by the rotating shaft and synchronously drives the driven bevel gear meshing with the driving bevel gear to rotate, the linkage valve plate is rotating and in a closed state for the inlet pipe and the exhaust pipe, the flexible air tube is in a compressed state, the gas in the flexible air tube is in a state of entering the sealing airbag through the air guide tube, and the sealing airbag is in an inflated state, the sealing airbag is in a state of sealing the gap between the cleaning tube and the washing conduit installed in the inlet pipe and the gap between the drain tube and the washing conduit installed in the exhaust pipe.

[0015] This invention discloses a method for a high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator, comprising the following steps: S1, during normal operation of the hydrogen production system: the device is in its initial state, the washing mechanism is located outside the separation mechanism, the linkage valve plate of the separation mechanism remains open, and the sealing piston of the pressure relief mechanism is in its initial position; the mixture of hydrogen and electrolyte from the electrolyzer enters through the inlet pipe, is transported to the separation tank through the outlet end to complete the initial gas-liquid separation, and the separated hydrogen is discharged through the exhaust pipe into the subsequent processing unit, where the filter screen at the front end of the exhaust pipe intercepts residual electrolyte droplets in the hydrogen; S2, starting online cleaning and inserting the cleaning unit: the adjusting push rod of the fixing mechanism is activated, and the adjusting push rod is pushed... The connecting support slides along the guide rail towards the separation tank, driving the connecting arm to move. The connecting arm pulls the mounting base and the entire washing mechanism closer to the separation tank, allowing the cleaning tube to extend into the washing conduit of the inlet pipe and the drain tube to extend into the washing conduit of the exhaust pipe. S3, Linkage switching of the production flow path and establishment of a seal: When the cleaning tube and drain tube are inserted, they push the sealing piston of the sealing mechanism to move backward along the washing conduit, compressing the return spring and the flexible air tube. The sealing piston drives the guide rod to move backward, causing the guide gear at the rear end of the guide rod to mesh with the driven gear of the linkage mechanism. The guide gear drives the driven gear to rotate, which in turn drives the drive bevel gear to rotate through the rotating shaft, causing the drive bevel gear to mesh with the driven bevel gear, thus linking the mechanism. The valve plate rotates, thereby sealing the inlet pipe and the outlet pipe, automatically switching the hydrogen production flow path to offline cleaning mode; S4, the airbag seals to form a cleaning circuit: after the flexible gas tube is compressed, the internal gas is transported to the sealing airbag through the gas guide pipe. The sealing airbag expands, sealing the gap between the cleaning tube and the washing tube, and the gap between the drain tube and the washing tube, forming a closed cleaning circuit isolated from the production system; S5, perform online cleaning operation: rotate the knob at the front end of the adjusting screw, the adjusting screw moves backward along the pressure relief guide plate, drives the ejector baffle to press the limit guide rod, pushes the sealing piston to compress the spring rod, and adjusts the pressure relief pressure of the pressure relief pipe to adapt to the cleaning conditions; start the supply pump to draw washing liquid from the washing tank, and through the supply pipe and The cleaning tube is injected into the separator and related pipelines for cleaning; at the same time, the reflux pump is started to recover the cleaning liquid back to the washing tank through the drain tube and reflux pipe to realize the circulation of the washing liquid; S6, cleaning is completed and production is restored: after cleaning, the supply pump and reflux pump are turned off, the control adjustment push rod is reversed to drive the washing mechanism to reset; the sealing piston is reset under the action of the reset spring, the guide gear and driven gear are disengaged, the linkage valve plate is opened, and the hydrogen production flow path is restored; the flexible gas tube is restored to its original state, and the sealing gas bag is deflated and contracted; the sealing piston and limit guide rod of the pressure relief mechanism are reset under the action of the spring rod, the device returns to the normal gas-liquid separation state, and the hydrogen production system can immediately resume continuous production.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the present invention is used, by setting up components such as adjusting push rods, guide rails, connecting supports, and connecting arms, and by adjusting the precise linear drive cooperation between the push rods and guide rails, the washing mechanism on the mounting base plate can accurately insert and remove the washing conduit of the separation mechanism through controllable linear displacement. This device can directly control the intervention and withdrawal of the cleaning unit through an external power unit, realizing the rapid, online isolation and commissioning of a single gas-liquid separator in the hydrogen production system without removing the equipment from the production line, thereby completely avoiding the shutdown of the entire hydrogen production line due to separator cleaning and maintenance, and significantly improving the continuity of hydrogen production and the comprehensive utilization rate of equipment.

[0017] 2. In use, this invention comprises components such as a cleaning intubation tube, a draining intubation tube, a sealing piston, a guide gear rack, a linkage valve plate, a flexible gas tube, and a sealing airbag. Insertion of the intubation tube pushes the piston backward, thereby driving the mechanical linkage of the gear rack, gears, and bevel gears, and the gas path linkage of the gas tube and airbag. This allows the linkage valve plate to automatically rotate and close the production flow path via gear transmission, while the sealing airbag automatically expands and seals the insertion gap through gas pressure transfer. This device can simultaneously complete flow path cutoff and seal establishment through a single insertion action, achieving the effect of constructing an independent, closed, high-purity cleaning circuit completely physically isolated from the operating hydrogen production system for the separator to be cleaned. This ensures that the cleaning liquid does not cross-contaminate with the production media (hydrogen, electrolyte), providing a fundamental guarantee for the stable high purity of hydrogen (e.g., above 99.99%) after production resumption from the equipment level, and greatly improving the safety of the maintenance process.

[0018] 3. In use, this invention employs components such as a supply pump, a return pump, a circulation pipeline, a washing tank, and an adjustable pressure relief mechanism (pressure relief guide plate, adjusting screw, ejector baffle, etc.). Through the cyclical drive of the dual pumps in a closed loop and the coordinated operation of the mechanical pressure regulating mechanism and the safety relief components, the washing liquid can powerfully flush and carry away contaminants from key areas such as the inner wall of the separator, the U-shaped exhaust pipe, and the filter screen seat through directional circulation. Simultaneously, the system's pressure relief threshold can be flexibly adjusted according to the cleaning process. This device, by establishing a precisely controllable external circulation cleaning and pressure adaptation system, achieves thorough, deep cleaning of the separator with minimal chemical consumption, and safely adapts to the pressure requirements of different cleaning stages. Combined with the corrosion-resistant properties of the non-metallic tank, this solution significantly reduces maintenance frequency, labor time, chemical consumption, and equipment wear, substantially lowering the overall lifecycle operation and maintenance costs of the hydrogen production system in the separation and purification stage.

[0019] 4. By using non-metallic materials, which have smooth surfaces and strong chemical inertness, they are less likely to react chemically with the separated gaseous and liquid materials and will not produce metal fragments, thus avoiding material contamination and ensuring the high purity requirements of industries such as food, pharmaceuticals, and electronics. In terms of cost, cement raw materials are widely available and inexpensive, and the manufacturing cost of polymer materials is also lower than that of corrosion-resistant metals such as stainless steel and titanium alloys, and no complex anti-corrosion treatment is required, further reducing the overall cost of production and maintenance. In addition, non-metallic materials have low thermal conductivity and excellent heat insulation performance, which can reduce heat exchange between the inside and outside of the equipment, avoid the impact of temperature changes on separation efficiency, and reduce the cost of laying insulation layers and energy loss. Furthermore, their surfaces are not prone to adsorbing scale, dirt, and material residues, and have good scale resistance. Daily maintenance only requires simple rinsing, resulting in lower maintenance frequency and simpler operation, which can reduce downtime for maintenance. Attached Figure Description

[0020] Figure 1 is a cross-sectional front view of the high-purity washing device and method for the non-metallic atmospheric pressure gas-liquid separator of the present invention; Figure 2 is a schematic diagram of the combined structure of the separation tank 1 and the inlet pipe of the high-purity washing device and method for the non-metallic atmospheric pressure gas-liquid separator of the present invention; Figure 3 is a schematic diagram of the combined structure of the pressure relief pipe and the discharge pipe of the high-purity washing device and method for the non-metallic atmospheric pressure gas-liquid separator of the present invention; Figure 4 is a schematic diagram of the combined structure of the connecting support plate and the guide rail of the high-purity washing device and method for the non-metallic atmospheric pressure gas-liquid separator of the present invention; Figure 5 Figure 6 is a schematic diagram of the mounting base and washing tank assembly structure of the high-purity washing device and method for non-metallic atmospheric pressure gas-liquid separator of the present invention; Figure 7 is a schematic diagram of the high-purity washing device and method for non-metallic atmospheric pressure gas-liquid separator of the present invention from a top view; Figure 8 is an enlarged schematic diagram of point A in Figure 6 of the high-purity washing device and method for non-metallic atmospheric pressure gas-liquid separator of the present invention; In the figures: 1, separation tank; 101, liquid inlet pipe; 1011, Liquid outlet; 1012, Exhaust pipe; 1013, Filter screen holder; 2, Pressure relief pipe; 201, Discharge pipe; 2011, Sealing piston; 2012, Spring rod; 2013, Limiting guide rod; 3, Washing conduit; 301, Sealing piston; 3011, Guide rod; 3012, Return spring; 3013, Flexible air tube; 3014, Guide gear row; 4, Connecting bracket; 401, Linkage valve plate; 4011, Driven bevel gear; 4012, Rotating shaft; 4013, Driven gear; 40 14. Drive bevel gear; 4015. Air guide pipe; 5. Connecting support plate; 501. Guide rail; 5011. Adjusting push rod; 5012. Connecting support; 5013. Connecting support arm; 6. Mounting base plate; 601. Washing tank; 6011. Pressure relief guide plate; 6012. Adjusting screw; 6013. Ejection baffle; 6014. Return pipe; 6015. Return pump; 6016. Supply pipe; 6017. Supply pump; 6018. Cleaning tube; 6019. Drainage tube; 6020. Sealing airbag. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Embodiments

[0022] Please refer to Figures 1-8. This invention provides a technical solution: a high-purity washing device and method for a non-metallic atmospheric pressure gas-liquid separator, comprising a separation tank 1. The separation tank 1 is the main body of a gas-liquid separator used to separate hydrogen and electrolyte in a water electrolysis hydrogen production system, and it is made of non-metallic material. A separation mechanism for separating gas and liquid from a mixture of hydrogen and electrolyte is fixedly connected inside the separation tank 1. A pressure relief mechanism for depressurizing the interior of the separation tank 1 is also fixedly connected to the bottom end of the separation tank 1. A sealing mechanism is installed inside the separation mechanism. A linkage mechanism is installed at the rear end of the sealing mechanism. The exterior of the separation tank 1... A fixing mechanism is fixedly connected to the wall; a washing mechanism is fixedly connected to the front end of the fixing mechanism; the washing mechanism has a normal operating state of the separator located outside the separation mechanism, and an online cleaning state inserted inside the separation mechanism; when the fixing mechanism drives the washing mechanism to move towards the side of the separation tank 1, so that the washing mechanism is in the state of being inserted inside the separation mechanism, the linkage mechanism acts synchronously to switch the production flow path in the separation mechanism to a closed state, and make the washing mechanism form a sealed cleaning circuit, so as to perform high-purity washing inside the gas-liquid separator without interrupting the hydrogen production process, so as to maintain the purity of hydrogen production.

[0023] The fixing mechanism includes a connecting support plate 5, a guide rail 501, an adjusting push rod 5011, a connecting support 5012, and a connecting arm 5013. The connecting support plate 5 is provided in two places, and the two connecting support plates 5 are symmetrically fixed at the left and right ends of the separation tank 1. The guide rail 501 is fixedly installed on the outer wall of the connecting support plate 5. A transverse groove is opened inside the guide rail 501. The adjusting push rod 5011 is fixedly installed in the transverse groove opened in the guide rail 501. The connecting support 5012 is slidably installed in the guide rail 501. One end of the connecting support 5012 is fixedly connected to the adjusting push rod 5011. The connecting arm 5013 is fixedly installed on the outer wall of the connecting support 5012. The adjusting push rod 5011 is used to push the connecting support 5012 and the connecting arm 5013 to move along the guide rail 501.

[0024] The washing mechanism includes a mounting base plate 6, a washing tank 601, a pressure relief guide plate 6011, an adjusting screw 6012, an ejection baffle 6013, a return pipe 6014, a return pump 6015, a supply pipe 6016, a supply pump 6017, a cleaning tube 6018, a drain tube 6019, and a sealing airbag 6020. The mounting base plate 6 is fixedly installed at the front end of two connecting arms 5013. The washing tank 601 is fixedly installed at the front end of the mounting base plate 6 and is filled with washing liquid. The pressure relief guide plate 6011 is fixedly installed at the bottom end of the mounting base plate 6 and has a screw hole inside. The adjusting screw 6012 is screwed into the screw hole in the pressure relief guide plate 6011. The ejection baffle 6013 is fixedly installed on the adjusting screw 6012. At the rear end, a knob is fixedly connected to the front end of the adjusting screw 6012. The return pipe 6014 is fixedly installed at the top of the washing tank 601 and is connected to the washing tank 601. The return pump 6015 is fixedly installed on the outer wall of the return pipe 6014. The supply pipe 6016 is fixedly installed at the top of the washing tank 601 and is connected to the washing tank 601. The supply pump 6017 is fixedly installed on the outer wall of the supply pipe 6016 and is used to draw liquid from the inside of the washing tank 601. The cleaning tube 6018 and the drain tube 6019 are fixedly arranged in a linear array in the mounting base plate 6. There are two sealing airbags 6020, which are fixedly installed on the outer walls of the cleaning tube 6018 and the drain tube 6019, respectively.

[0025] The pressure relief mechanism includes a pressure relief pipe 2, a discharge pipe 201, a sealing piston 2011, a spring rod 2012, and a limiting guide rod 2013. The pressure relief pipe 2 has an L-shaped structure and is fixedly installed at the bottom end of the separation tank 1. The discharge pipe 201 is fixedly installed at the bottom end of the outer circumference of the pressure relief pipe 2 and is connected to the pressure relief pipe 2. The sealing piston 2011 is movably installed inside the pressure relief pipe 2. The front end of the spring rod 2012 is fixedly installed at the front end of the sealing piston 2011. The limiting guide rod 2013 is fixedly installed at the bottom end of the sealing piston 2011. At the front end of the spring rod 2012, the limiting guide rod 2013 extends forward to the pressure relief pipe 2. The limiting guide rod 2013 matches the adjusting screw 6012 and the adjusting ejector baffle 6013. When the ejector baffle 6013 is in the state where the corresponding limiting guide rod 2013 is pushed backward, the spring rod 2012 is in the state of being squeezed and contracted by the sealing piston 2011 and the limiting guide rod 2013. At this time, the sealing piston 2011 is in the state of increased repulsive force from the spring rod 2012, that is, the pressure required for pressure relief inside the pressure relief pipe 2 increases.

[0026] The separation mechanism includes an inlet pipe 101, an outlet end 1011, an exhaust pipe 1012, and a filter holder 1013. The inlet pipe 101 is fixedly installed on the top right side of the separation tank 1 and is used to receive the hydrogen-electrolyte mixture from the electrolyzer. The outlet end 1011 is located at the bottom end of the inlet pipe 101 and is used to supply liquid to the interior of the separation tank 1. The exhaust pipe 1012 has a U-shaped structure, and the right end of the exhaust pipe 1012 is located inside the separation tank 1. The left end of the exhaust pipe 1012 extends upward out of the separation tank 1 and is used to output the separated hydrogen. The filter holder 1013 is fixedly installed at the front end of the exhaust pipe 1012 and is used to intercept and separate residual electrolyte droplets in the hydrogen.

[0027] The sealing mechanism includes a washing conduit 3, a sealing piston 301, a guide rod 3011, a return spring 3012, a flexible air tube 3013, and a guide toothed rack 3014. There are two washing conduits 3, which are respectively fixedly installed at the top extensions of the liquid inlet pipe 101 and the exhaust pipe 1012. The sealing piston 301 is movably installed inside the washing conduit 3. The guide rod 3011 is fixedly installed at the rear end of the sealing piston 301, passing through the rear wall of the washing conduit 3. One end of the return spring 3012 is fixedly installed at the rear end of the sealing piston 301, and the other end is fixedly connected to the rear end of the inner wall of the washing conduit 3. A flexible air tube 3013 is also fixedly connected to the inner side of the sealing piston 301 and the washing conduit 3. The flexible air tube 3013 is used to shield the return spring 3012 and the guide rod 3011. The interior of the flexible air tube 3013 is filled with gas. The guide toothed rack 3014 is fixedly installed at the rear end of the guide rod 3011.

[0028] The linkage mechanism includes a connecting bracket 4, a linkage valve plate 401, a driven bevel gear 4011, a rotating shaft 4012, a driven gear 4013, a driving bevel gear 4014, and a gas guide pipe 4015. Two connecting brackets 4 are provided, and the two connecting brackets 4011 are linearly arrayed and fixed at the rear ends of the liquid inlet pipe 101 and the exhaust pipe 1012. Two linkage valve plates 401 are provided, and the two linkage valve plates 4011 are respectively rotatably installed inside the liquid inlet pipe 101 and the exhaust pipe 1012, used to cut off the hydrogen production flow path during cleaning; the two linkage valve plates 4012... Each of the following components is fixedly connected to a driven bevel gear 4011 at its rear end. The rotating shaft 4012 is rotatably mounted in the connecting bracket 4. The driven gear 4013 is fixedly mounted at the bottom end of the rotating shaft 4012. The driving bevel gear 4014 is fixedly mounted at the top end of the rotating shaft 4012. The driven gear 4013 meshes with the guide gear 3014 for transmission. The driving bevel gear 4014 meshes with the driven bevel gear 4011 for transmission. One end of the air guide tube 4015 is fixedly connected to the flexible air tube 3013, and the other end of the air guide tube 4015 is fixedly connected to the sealing airbag 6020.

[0029] When the cleaning cannula 6018 and the draining cannula 6019 are inserted into the inlet pipe 101 and the vent pipe 1012 respectively, the sealing piston 301 is in a rearward movement state. When the sealing piston 301 is in a rearward movement state, the guide rod 3011 is in a state of meshing transmission with the driven gear 4013 through the guide gear row 3014.

[0030] When the guide gear 3014 is in a meshing transmission state with the driven gear 4013, the drive bevel gear 4014 is in a state of being driven to rotate by the rotating shaft 4012, and simultaneously drives the driven bevel gear 4011 that meshes with the drive bevel gear 4014 to rotate. At this time, the linkage valve plate 401 is rotating and is in a closed state for the liquid inlet pipe 101 and the exhaust pipe 1012. The flexible air pipe 3013 is in a compressed state. The gas in the flexible air pipe 3013 is in a state of entering the sealing airbag 6020 through the air guide pipe 4015. When the sealing airbag 6020 is in an inflated state, the sealing airbag 6020 is in a state of sealing the gap between the cleaning tube 6018 and the washing tube 3 installed in the liquid inlet pipe 101 and the gap between the drain tube 6019 and the washing tube 3 installed in the exhaust pipe 1012.

[0031] This invention discloses a method for a high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator, comprising the following steps: S1, during normal operation of the hydrogen production system: the device is in its initial state, the washing mechanism is located outside the separation mechanism, the linkage valve plate 401 of the separation mechanism remains open, and the sealing piston 2011 of the pressure relief mechanism is in its initial position; the mixture of hydrogen and electrolyte from the electrolyzer enters through the inlet pipe 101, and is transported to the separation tank 1 through the outlet 1011 to complete the initial gas-liquid separation. After separation, the hydrogen is discharged through the exhaust pipe 1012 and enters the subsequent processing unit. The filter seat 1013 at the front end of the exhaust pipe 1012 intercepts residual electrolyte droplets in the hydrogen; S2, starting online cleaning and inserting the cleaning unit: starting the adjustment of the fixing mechanism. The push rod 5011 is adjusted to push the connecting support 5012 to slide along the guide rail 501 towards the separation tank 1. The connecting support 5012 drives the connecting arm 5013 to move. The connecting arm 5013 pulls the mounting base 6 and the entire washing mechanism closer to the separation tank 1, so that the cleaning tube 6018 extends into the washing conduit 3 of the liquid inlet pipe 101, and the drain tube 6019 extends into the washing conduit 3 of the exhaust pipe 1012. S3, linkage switching of production flow path and establishment of seal: When the cleaning tube 6018 and the drain tube 6019 are inserted, the sealing piston 301 of the sealing mechanism is pushed to move backward along the washing conduit 3, compressing the return spring 3012 and the flexible air tube 3013. The sealing piston 301 drives the guide rod 3011 to move backward, so that the guide rod 3011 moves backward. The guide gear 3014 at the rear end of rod 3011 meshes with the driven gear 4013 of the linkage mechanism; the guide gear 3014 drives the driven gear 4013 to rotate, which in turn drives the drive bevel gear 4014 to rotate through the rotating shaft 4012, and the drive bevel gear 4014 meshes with the driven bevel gear 4011, causing the linkage valve plate 401 to rotate, thereby closing the liquid inlet pipe 101 and the exhaust pipe 1012, and automatically switching the hydrogen production flow path to the offline cleaning state; S4, the airbag seal forms the cleaning circuit: after the flexible gas tube 3013 is compressed, the internal gas is transported to the sealing airbag 6020 through the gas guide tube 4015. The sealing airbag 6020 expands, sealing the gap between the cleaning insertion tube 6018 and the washing conduit 3, and the gap between the drain insertion tube 6019 and the washing conduit 3. The gap in conduit 3 forms a closed cleaning loop isolated from the production system; S5, Perform online cleaning operation: Rotate the knob at the front end of the adjusting screw 6012, the adjusting screw 6012 moves backward along the pressure relief guide plate 6011, driving the ejector baffle 6013 to press against the limit guide rod 2013, pushing the sealing piston 2011 to compress the spring rod 2012, adjusting the pressure relief pressure of the pressure relief pipe 2 to adapt to the cleaning conditions; Start the supply pump 6017 to draw washing liquid from the washing tank 601, and inject it into the separation tank 1 and related pipelines through the supply pipe 6016 and the cleaning pipe 6018 for cleaning; At the same time, start the return pump 6015, and recover the cleaned washing liquid back to the washing tank 601 through the drain pipe 6019 and the return pipe 6014 to realize the circulation of washing liquid;S6. Cleaning complete, production restored: After cleaning, shut off the supply pump 6017 and return pump 6015, control the adjusting push rod 5011 to reverse, driving the washing mechanism to reset; the sealing piston 301 resets under the action of the reset spring 3012, the guide gear 3014 disengages from the driven gear 4013, the linkage valve plate 401 opens, restoring the hydrogen production flow path; the flexible gas tube 3013 returns to its original state, and the sealing gas bag 6020 deflates and contracts; the sealing piston 2011 and the limiting guide rod 2013 of the pressure relief mechanism reset under the action of the spring rod 2012, the device returns to the normal gas-liquid separation state, and the hydrogen production system can immediately resume continuous production.

[0032] In this embodiment, during the electrolysis of water to produce hydrogen, direct current is applied to the alkaline or acidic electrolyte solution in the electrolytic cell. Water molecules undergo a reduction reaction at the cathode to generate hydrogen gas, and an oxidation reaction at the anode to generate oxygen gas. The generated hydrogen gas and a large amount of atomized electrolyte form a gas-liquid mixture, which is transported to the separation tank 1 of this device through process pipelines. In normal production mode, the mixture enters the separation tank 1 through the liquid inlet pipe 101. In the tank, preliminary separation is achieved by utilizing the density difference between gas and liquid: hydrogen gas rises, and the entrained droplets are partially separated and fall due to gravity, collision, etc. The preliminarily purified hydrogen gas enters the U-shaped exhaust pipe 1012, and is further intercepted by the filter screen 1013 during the flow process, capturing finer droplets and trace solid impurities, thereby completing the preliminary purification. The hydrogen is then transported to subsequent purification or compression units. After a certain number of cycles, contaminants such as electrolyte crystals and metal ion impurities gradually accumulate inside the separator (especially on the inner wall of the exhaust pipe 1012 and the filter holder 1013), leading to a decrease in separation efficiency and potentially contaminating the output hydrogen, affecting the final purity. At this point, the online cleaning program can be started without stopping the entire hydrogen production system. During cleaning, the adjusting push rod 5011 of the fixing mechanism is activated, driving the connecting support 5012 to slide precisely along the guide rail 501 towards the separation tank 1. This, in turn, drives the entire washing mechanism forward through the connecting support arm 5013. The cleaning tube 6018 and the drain tube 6019 on the mounting base 6 are then precisely aligned and inserted into the top of the inlet pipe 101 and the exhaust pipe 1012. The insertion of the washing conduit 3 directly acts on the sealing piston 301, pushing it backward against the resistance of the return spring 3012. This mechanical displacement generates two parallel linkage paths: the first is a mechanical transmission path, where the backward movement of the sealing piston 301 causes its end guide gear 3014 to mesh with the driven gear 4013 of the linkage mechanism. The power is transmitted through the rotating shaft 4012 to the upper drive bevel gear 4014, which meshes with the driven bevel gear 4011 fixed to the shaft end of the linkage valve plate 401, thus converting linear displacement into rotational torque. This drives the linkage valve plate 401 inside the inlet pipe 101 and the outlet pipe 1012 to rotate synchronously to the closed position, instantly completing the process of switching the separator's inlet and outlet from... The physical shut-off operation in the ongoing hydrogen production process achieves automatic switching and isolation of the production flow path. The second path is a gas path linkage path. The closed piston 301 moves backward, simultaneously compressing its circumferential flexible gas tube 3013. The inert gas sealed within is forced through the connected gas guide tube 4015 into the annular sealing gasbag 6020 on the outer wall of the cleaning tube 6018 and the drain tube 6019. The sealing gasbag 6020 rapidly expands, tightly filling the annular gap between the outer wall of the tube and the inner wall of the washing conduit 3, forming a reliable high-pressure fluid sealing barrier. Thus, through the insertion action, the system automatically completes the flow path closure and dynamic sealing, constructing a completely isolated, sealed external circulation cleaning structure for the separator from the external production system. Subsequently…According to the cleaning process requirements, the operator can fine-tune the back pressure of the sealing piston 2011 by rotating the adjusting screw 6012 to drive the limit guide rod 2013 of the ejector baffle 6013 to press and release the pressure. This allows setting the allowable working pressure of the separator 1 during the cleaning process to meet the needs of different cleaning stages. The operator can also start the supply pump 6017 to pump the pre-prepared high-purity cleaning agent from the washing tank 601 into the cleaning tube 6018 through the supply pipe 6016. The high-pressure injection into the isolated separator 1 allows the cleaning solution to fully soak and flush the inner wall of the separator 1, the inlet pipe 101, and the outlet 1011. The system dissolves and removes electrolyte crystals and impurities from all surfaces that may harbor contaminants, including the inner wall of the exhaust pipe 1012 and the filter holder 1013. Simultaneously, the return pump 6015 is activated, creating negative pressure at the inlet of the drain pipe 6019. This draws the contaminated waste liquid back into the washing tank 601 via the drain pipe 6019 and the return pipe 6014, forming a complete closed-loop cleaning circuit of "injection-rinsing-recovery." The washing tank 601 can be equipped with a filtration or neutralization unit for online regeneration of the recovered liquid, enabling the recycling of the cleaning agent. The number of cycles during the cleaning process can be set according to the degree of contamination. The cleaning process continues until the discharged liquid reaches the required cleanliness level. After cleaning, the supply pump 6017 and return pump 6015 are turned off sequentially. Then, the adjusting push rod 5011 is reversed to pull the entire washing mechanism back to its original position. As the insertion tube is withdrawn, the sealing piston 301 automatically resets under the action of the return spring 3012. The guide gear 3014 disengages from the driven gear 4013, and the linkage valve plate 401 automatically rotates to the open state under reverse transmission, restoring the production flow path to unobstructed flow. At the same time, the flexible air tube 3013 returns to its original position, drawing back the gas from the sealing airbag 6020, causing the sealing airbag 6020 to contract and release the seal. The sealing and pressure relief mechanism also resets to the production set value under the action of spring rod 2012. Within minutes, the entire separator can switch from cleaning to production mode, re-entering the hydrogen production system and immediately restoring its high-purity hydrogen separation function. This working principle cleverly transforms the maintenance requirements in the hydrogen production process into an automatically executed, safely isolated, highly efficient, and clean mechanical and fluid process. This ensures that the core separation equipment maintains optimal working condition without requiring shutdown and disassembly, thus providing crucial equipment support for the continuous, stable, efficient, and high-purity hydrogen production of the entire hydrogen production system.

[0033] It should be noted that the main body of the gas-liquid separator in this application is made of plastic, but it can also be made of concrete through molding, or of materials such as ceramics that have both hardness and plasticity. Its performance is the same as or even better than that of this invention, and all of them should be within the scope of protection of this application.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator, comprising a separation tank (1), characterized in that: The separation tank (1) is the gas-liquid separator body used to separate hydrogen and electrolyte in the water electrolysis hydrogen production system, and it is made of non-metallic material; the separation tank (1) is fixedly connected to a separation mechanism for separating gas and liquid from the mixture of hydrogen and electrolyte; the bottom of the separation tank (1) is also fixedly connected to a pressure relief mechanism for depressurizing the inside of the separation tank (1); a sealing mechanism is installed inside the separation mechanism; a linkage mechanism is installed at the rear end of the sealing mechanism; a fixing mechanism is fixedly connected to the outer wall of the separation tank (1); a washing mechanism is fixedly connected to the front end of the fixing mechanism; the washing mechanism has a normal operating state of the separator located outside the separation mechanism, and an online cleaning state inserted into the separation mechanism; when the fixing mechanism drives the washing mechanism to move to one side of the separation tank (1), so that the washing mechanism is in the state of being inserted into the separation mechanism, the linkage mechanism operates synchronously, switches the production flow path in the separation mechanism to a closed state, and makes the washing mechanism form a sealed cleaning circuit, so as to perform high-purity washing on the inside of the gas-liquid separator without interrupting the hydrogen production process, so as to maintain the purity of hydrogen production.

2. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 1, characterized in that: The fixing mechanism includes a connecting support plate (5), a guide rail (501), an adjusting push rod (5011), a connecting support (5012), and a connecting arm (5013). The connecting support plate (5) is provided in two locations, symmetrically fixed at the left and right ends of the separation tank (1). The guide rail (501) is fixed to the outer wall of the connecting support plate (5), and a transverse groove is provided inside the guide rail (501). The adjusting push rod (5011)... The connecting support (5012) is fixedly installed in the transverse groove opened in the guide rail (501), and is slidably installed in the guide rail (501). One end of the connecting support (5012) is fixedly connected to the adjusting push rod (5011). The connecting arm (5013) is fixedly installed on the outer wall of the connecting support (5012). The adjusting push rod (5011) is used to push the connecting support (5012) and the connecting arm (5013) to move along the guide rail (501).

3. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 1, characterized in that: The washing mechanism includes a mounting base plate (6), a washing tank (601), a pressure relief guide plate (6011), an adjusting screw (6012), an ejection baffle (6013), a return pipe (6014), a return pump (6015), a supply pipe (6016), a supply pump (6017), a cleaning tube (6018), a drain tube (6019), and a sealing airbag (6020). The mounting base plate (6) is fixedly installed at the front end of two connecting arms (5013). The washing tank (601) is fixedly disposed at the front end of the mounting base plate (6). The washing tank (601) is filled with washing liquid. The pressure relief guide plate (6011) is fixedly disposed at the bottom end of the mounting base plate (6). The pressure relief guide plate (6011) has a screw hole inside. The adjusting screw (6012) is screwed into the screw hole in the pressure relief guide plate (6011). The ejection baffle (6013) is fixedly disposed at the rear end of the adjusting screw (6012). The adjusting screw (6012) has a knob fixedly connected to its front end. The return pipe (6014) is fixedly installed at the top of the washing tank (601) and is connected to the washing tank (601). The return pump (6015) is fixedly installed on the outer wall of the return pipe (6014). The supply pipe (6016) is fixedly installed at the top of the washing tank (601) and is connected to the washing tank (601). A pump (6017) is fixedly installed on the outer wall of the supply pipe (6016). The supply pump (6017) is used to draw liquid from the inside of the washing tank (601). The cleaning tube (6018) and the drain tube (6019) are fixedly installed in a linear array inside the mounting base plate (6). There are two sealing airbags (6020). The two sealing airbags (6020) are fixedly installed on the outer walls of the cleaning tube (6018) and the drain tube (6019) respectively.

4. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 1, characterized in that: The pressure relief mechanism includes a pressure relief pipe (2), a discharge pipe (201), a sealing piston (2011), a spring rod (2012), and a limiting guide rod (2013). The pressure relief pipe (2) has an L-shaped structure and is fixedly installed at the bottom end of the separation tank (1). The discharge pipe (201) is fixedly installed at the bottom end of the outer circumference of the pressure relief pipe (2) and is connected to the pressure relief pipe (2). The sealing piston (2011) is movably installed inside the pressure relief pipe (2). The front end of the spring rod (2012) is fixedly installed at the front end of the sealing piston (2011). The limiting guide rod (2013) is fixedly installed at the bottom end of the outer circumference of the pressure relief pipe (2). Located at the front end of the spring rod (2012), the limiting guide rod (2013) extends forward to form a pressure relief pipe (2). The limiting guide rod (2013) is matched with the adjusting screw (6012) and the adjusting ejector baffle (6013). When the ejector baffle (6013) is in the state where the corresponding limiting guide rod (2013) is pushed backward, the spring rod (2012) is in a state of being squeezed and contracted by the sealing piston (2011) and the limiting guide rod (2013). At this time, the sealing piston (2011) is in a state of being subjected to increased repulsive force from the spring rod (2012), that is, the pressure required for pressure relief inside the pressure relief pipe (2) increases.

5. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 1, characterized in that: The separation mechanism includes an inlet pipe (101), an outlet end (1011), an exhaust pipe (1012), and a filter holder (1013). The inlet pipe (101) is fixedly installed on the top right side of the separation tank (1) and is used to receive the hydrogen-electrolyte mixture from the electrolyzer. The outlet end (1011) is installed at the bottom end of the inlet pipe (101) and is used to supply liquid to the interior of the separation tank (1). The main body of the exhaust pipe (1012) is U-shaped, and the air inlet at the right end of the exhaust pipe (1012) is located inside the separation tank (1). The air outlet at the left side of the exhaust pipe (1012) extends upward out of the separation tank (1) and is used to output the separated hydrogen. The filter holder (1013) is fixedly installed at the front end of the exhaust pipe (1012) and is used to intercept and separate residual electrolyte droplets in the hydrogen.

6. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 1, characterized in that: The sealing mechanism includes a washing conduit (3), a sealing piston (301), a guide rod (3011), a return spring (3012), a flexible air tube (3013), and a guide toothed rack (3014). The washing conduit (3) has two locations, which are respectively fixedly installed at the top extensions of the inlet pipe (101) and the outlet pipe (1012). The sealing piston (301) is movably installed inside the washing conduit (3). The guide rod (3011) is fixedly installed at the rear end of the sealing piston (301), and the guide rod (3011) passes rearward through the washing conduit. The rear wall of the tube (3) has one end of the return spring (3012) fixedly disposed at the rear end of the closed piston (301), and the other end of the return spring (3012) fixedly connected to the rear end of the inner wall of the washing conduit (3). The closed piston (301) and the inner side of the washing conduit (3) are also fixedly connected to a flexible air tube (3013). The flexible air tube (3013) is used to shield the return spring (3012) and the guide rod (3011). The interior of the flexible air tube (3013) is filled with gas. The guide tooth row (3014) is fixedly disposed at the rear end of the guide rod (3011).

7. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 1, characterized in that: The linkage mechanism includes a connecting bracket (4), a linkage valve plate (401), a driven bevel gear (4011), a rotating shaft (4012), a driven gear (4013), a driving bevel gear (4014), and a gas guide pipe (4015). The connecting bracket (4) is provided in two locations, and these two locations are linearly arrayed and fixedly installed at the rear ends of the liquid inlet pipe (101) and the exhaust pipe (1012). The linkage valve plate (401) is provided in two locations, and these two linkage valve plates (401) are rotatably installed in the liquid inlet pipe (101) and the exhaust pipe (1012), respectively, for cutting off the hydrogen production flow path during cleaning. The two linkage valve plates (401)... Each rear end is fixedly connected with a driven bevel gear (4011). The rotating shaft (4012) is rotatably mounted in the connecting bracket (4). The driven gear (4013) is fixedly mounted at the bottom end of the rotating shaft (4012). The driving bevel gear (4014) is fixedly mounted at the top end of the rotating shaft (4012). The driven gear (4013) meshes with the guide gear row (3014) for transmission. The driving bevel gear (4014) meshes with the driven bevel gear (4011) for transmission. One end of the air guide tube (4015) is fixedly connected to the flexible air tube (3013). The other end of the air guide tube (4015) is fixedly connected to the sealing airbag (6020).

8. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 3, characterized in that: When the cleaning cannula (6018) and the draining cannula (6019) are inserted into the inlet pipe (101) and the vent pipe (1012) respectively, the sealing piston (301) is in a rearward movement state. When the sealing piston (301) is in a rearward movement state, the guide rod (3011) is in a state of meshing transmission with the driven gear (4013) through the guide gear row (3014).

9. The high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to claim 7, characterized in that: When the guide gear (3014) is in a meshing transmission state with the driven gear (4013), the driving bevel gear (4014) is in a state of being driven to rotate by the rotating shaft (4012), and synchronously drives the driven bevel gear (4011) that meshes with the driving bevel gear (4014) to rotate. At this time, the linkage valve plate (401) is rotating and is in a closed state for the liquid inlet pipe (101) and the exhaust pipe (1012). The flexible air pipe (3013) When the flexible air tube (3013) is in a compressed state, the gas in the flexible air tube (3013) is in a state of entering the sealing air bag (6020) through the air guide tube (4015). When the sealing air bag (6020) is in an inflated state, the sealing air bag (6020) is in the gap between the sealing cleaning tube (6018) and the washing tube (3) installed in the liquid inlet tube (101) and the gap between the drain tube (6019) and the washing tube (3) installed in the exhaust tube (1012).

10. A cleaning method for a high-purity washing device for a non-metallic atmospheric pressure gas-liquid separator according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Normal operation of the hydrogen production system: The device is in its initial state, the entire washing mechanism is located outside the separation mechanism, the linkage valve plate (401) of the separation mechanism remains open, and the sealing piston (2011) of the pressure relief mechanism is in its initial position; the mixture of hydrogen and electrolyte from the electrolyzer enters through the inlet pipe (101) and is transported to the separation tank (1) through the outlet end (1011) to complete the initial gas-liquid separation. After separation, the hydrogen is discharged through the exhaust pipe (1012) into the subsequent processing unit. The filter screen seat (1013) at the front end of the exhaust pipe (1012) intercepts the residual electrolyte droplets in the hydrogen; S2. Start online cleaning and insert the cleaning unit: Start the adjusting push rod (5011) of the fixing mechanism and adjust the push rod. The rod (5011) pushes the connecting support (5012) to slide along the guide rail (501) toward the separation tank (1). The connecting support (5012) drives the connecting arm (5013) to move. The connecting arm (5013) pulls the mounting base (6) and the washing mechanism as a whole closer to the separation tank (1), so that the cleaning tube (6018) extends into the washing conduit (3) of the inlet pipe (101), and the drain tube (6019) extends into the washing conduit (3) of the exhaust pipe (1012). S3, linkage switching of production flow path and establishment of seal: When the cleaning tube (6018) and the drain tube (6019) are inserted, the closing piston (301) of the closing mechanism is pushed to move backward along the washing conduit (3), compressing the reset spring (3). 012) and flexible gas tube (3013); the closed piston (301) drives the guide rod (3011) to move backward, so that the guide gear row (3014) at the rear end of the guide rod (3011) meshes with the driven gear (4013) of the linkage mechanism; the guide gear row (3014) drives the driven gear (4013) to rotate, and drives the drive bevel gear (4014) to rotate through the rotating shaft (4012), and drives the bevel gear (4014) to mesh with the driven bevel gear (4011), so that the linkage valve plate (401) rotates, thereby closing the liquid inlet pipe (101) and the exhaust pipe (1012), and automatically switching the hydrogen production flow path to the offline cleaning state; S4, the gas bag seal forms the cleaning circuit: flexible gas tube (3 013) After compression, the internal gas is transported to the sealing airbag (6020) through the air guide pipe (4015). The sealing airbag (6020) expands, and the gap between the sealing cleaning tube (6018) and the washing tube (3), and the gap between the drain tube (6019) and the washing tube (3) form a closed cleaning circuit isolated from the production system; S5, Perform online cleaning operation: Rotate the knob at the front end of the adjusting screw (6012), and the adjusting screw (6012) moves backward along the pressure relief guide plate (6011), which drives the ejection baffle (6013) to press against the limit guide rod (2013), pushes the sealing piston (2011) to compress the spring rod (2012), and adjusts the pressure relief of the pressure relief pipe (2) to adapt to the cleaning conditions;Start the supply pump (6017) to draw washing liquid from the washing tank (601), and inject it into the separator (1) and related pipelines through the supply pipe (6016) and the cleaning pipe (6018) for cleaning; at the same time, start the return pump (6015) to recover the washed washing liquid back to the washing tank (601) through the drain pipe (6019) and the return pipe (6014) to realize the circulation of washing liquid; S6, cleaning is completed and production is restored: after cleaning is completed, turn off the supply pump (6017) and the return pump (6015), and control the adjusting push rod (5011) to reverse The system operates, causing the washing mechanism to reset; the closed piston (301) resets under the action of the reset spring (3012), the guide gear (3014) disengages from the driven gear (4013), the linkage valve plate (401) opens, restoring the hydrogen production flow path; the flexible gas tube (3013) returns to its original state, and the sealing gas bag (6020) releases and contracts; the sealing piston (2011) and the limiting guide rod (2013) of the pressure relief mechanism reset under the action of the spring rod (2012), the device returns to the normal gas-liquid separation state, and the hydrogen production system can immediately resume continuous production.

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