Self-cleaning alkali liquor filter of water electrolysis hydrogen production system

Abstract

The utility model discloses a self-cleaning alkali liquor filter of a water electrolysis hydrogen production system. The self-cleaning alkali liquor filter comprises an outer cylinder and a filtering device, wherein the filtering device is connected with the inner wall of the outer cylinder and divides the outer cylinder into a filtering area and an unfiltered area; an automatic cleaning device is arranged on the outer wall of the filtering device, a flushing device for assisting in cleaning the filtering device is arranged in the automatic cleaning device, and a magnetic device is arranged at the bottom. The automatic cleaning device is driven by the impact force of the liquid inlet to automatically clean the filtering barrel efficiently in real time; high-pressure water of the flushing device flushes outwards from the inside of the filter cartridge to assist in cleaning the filter cartridge; the magnetic suction device is used for removing metal impurities and preventing the metal impurities from flowing to the filter cartridge to cause abrasion of the outer wall of the filter cartridge; the cleaned dirt is collected in a conical collecting barrel of the automatic cleaning device and conveyed to the bottom of the barrel under the action of centrifugal force, so that the dirt is prevented from flowing to the filter cartridge again, and the cleaning efficiency is further ensured; starting of the flushing device is controlled through pressure difference, cleaning efficiency is guaranteed, energy consumption is reduced, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a water electrolysis hydrogen production device, in particular to a self-cleaning alkali solution filter of a water electrolysis hydrogen production system. Background Art

[0002] As a clean, efficient and sustainable hydrogen production technology, water electrolysis hydrogen production technology has received widespread attention worldwide in recent years under the background of energy transformation and low-carbon development. Among them, alkaline water electrolysis hydrogen production technology is currently the most mature and widely used water electrolysis hydrogen production technology, with the advantages of low cost, simple equipment, large hydrogen production and stable performance. Alkaline water electrolysis hydrogen production system usually uses 30% KOH solution as electrolyte. Under the action of direct current, the electrolyzer produces hydrogen and oxygen. Because the impurities in the electrolyte have a great influence on the electrolysis efficiency of water, such as Ca 2+ Mg 2+ Excessive electrolyte concentrations can lead to crystallization, potentially forming carbonate precipitates that can clog the liquid inlet and gas outlet holes. Mechanical impurities such as iron filings and diaphragm lint in the pipes adhere to the diaphragm and cathode, increasing the cell voltage and reducing electrolysis efficiency. To ensure proper electrolyte circulation, alkali filters are typically installed in the electrolyte pipes to remove most mechanical impurities. However, the structure of common alkali filters is relatively simple. Alkali enters the filter from the side, passes through a layer of nickel mesh, and then exits from the side or top. Mechanical impurities removed by the mesh tend to cling to the filter. Over extended operation, the mesh can clog, increasing the pressure differential between the filter inlet and outlet, necessitating shutdown for maintenance and cleaning. Some methods add front and rear manual valves and bypass valves to the filter to allow for continuous cleaning. However, this increases the investment cost of the pipe valves. Furthermore, when the bypass is switched, the unfiltered alkali flows directly into the electrolytic cell, contaminating the cell and reducing electrolysis efficiency. Therefore, to improve the continuous operation efficiency of the equipment, reduce system downtime caused by filter blockage, save the manpower and material costs of filter installation and removal, and improve the automation level of the system, a lye filter that can automatically clean and eliminate downtime for maintenance is needed. Some existing filter products can automatically clean impurities, but most require external power such as an electric motor, which invisibly increases system energy consumption and equipment investment costs. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to achieve high-efficiency and automatic cleaning of the filter without increasing the energy consumption of the electrolysis water hydrogen production system, and to provide a self-cleaning alkali solution filter for the electrolysis water hydrogen production system.

[0004] Technical solution: The self-cleaning alkaline liquid filter of the electrolysis water hydrogen production system described in the utility model includes an outer cylinder and a filtering device connected to the inner wall of the outer cylinder to divide the outer cylinder into a filtered area and an unfiltered area; the outer wall of the filtering device is provided with an automatic cleaning device that uses the flow force of the water inlet as power; the automatic cleaning device includes a turbine arranged in the same horizontal direction as the water inlet, and a conical collecting cylinder connected to the turbine for collecting and cleaning dirt, the top end of the conical collecting cylinder is connected to a U-shaped brush rack vertically arranged between the filtering device and the inner wall of the outer cylinder, and the U-shaped brush rack is provided with a brush for cleaning the outer wall of the filtering device to prevent clogging.

[0005] Furthermore, a magnetic device for removing metal impurities is provided at the bottom of the inner wall of the outer cylinder, thereby ensuring filtration efficiency while preventing metal impurities from flowing into the filter cartridge and causing wear on the outer wall of the filter cartridge during the self-cleaning process.

[0006] Furthermore, the filtering device includes a filter cartridge, a filter screen wrapped on the outer wall of the filter cartridge, and a filter cartridge bracket sealingly connected to the inner wall of the outer cartridge. A flushing device for spraying the filtering device from the inside out is provided in the filter cartridge.

[0007] Furthermore, the flushing device includes a water inlet pipe and multiple flushing pipes connected to the water inlet pipe and vertically arranged in the filter cartridge. The flushing pipes are provided with flushing holes for increasing water pressure to flush the filter cartridge. High-pressure water flushes from the inside of the filter cartridge to the outside, assisting the automatic cleaning device to clean the filter cartridge.

[0008] Furthermore, the flushing device also includes a pressure detection device that detects the pressure between the water inlet and the water outlet and starts its operation, and uses the pressure difference to control the opening of the flushing device, thereby reducing energy consumption and production costs while ensuring cleaning efficiency.

[0009] Furthermore, a connecting rod is provided on the turbine, and the connecting rod is fixedly connected to the outer cylinder through a crossbeam, so as to ensure that the automatic cleaning device is in a balanced state during operation when the turbine rotates, thereby reducing disturbance to the filtering device.

[0010] Furthermore, the connection between the turbine and the conical collecting cylinder is provided with a guide port for conveying the collected dirt to the bottom of the outer cylinder. The cleaned dirt is gathered in the collecting cylinder under the action of centrifugal force and then conveyed to the bottom of the cylinder through the guide port, preventing the dirt from flowing to the filter cylinder again, thereby further ensuring the cleaning efficiency.

[0011] Furthermore, a sewage outlet is provided at the bottom of the outer cylinder to facilitate regular cleaning of dirt; an air outlet valve is provided at the top to adjust the internal pressure, and an inspection port is provided to facilitate regular inspection of the internal device.

[0012] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. The impact force of the liquid inlet is used to drive the automatic cleaning device to realize real-time and efficient automatic cleaning of the filter barrel; 2. A flushing device is provided in the filter cartridge, and high-pressure water is flushed from the inside of the filter cartridge to the outside to assist the automatic cleaning device in cleaning the filter cartridge; 3. A magnetic suction device is provided at the bottom of the cylinder to remove metal impurities and prevent metal impurities from flowing into the filter cartridge and causing wear on the outer wall of the filter cartridge during the self-cleaning process; 4. A conical collecting barrel is provided under the filter barrel. The cleaned dirt is gathered in the collecting barrel under the action of centrifugal force and then transported to the bottom of the cylinder to prevent the dirt from flowing into the filter cartridge again, thereby further ensuring the cleaning efficiency; 5. The opening of the flushing device is controlled by the pressure difference, thereby reducing energy consumption and production costs while ensuring cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic structural diagram of the new automatic cleaning device of the present invention. DETAILED DESCRIPTION

[0015] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 The self-cleaning alkaline liquid filter of the electrolysis water hydrogen production system shown includes an outer cylinder 107 and a filtering device 3 connected to the inner wall of the outer cylinder 107 to divide the outer cylinder 107 into a filtered area and an unfiltered area; the filtering device 3 includes a filter cartridge 302, a filter screen 301 wrapped on the outer wall of the filter cartridge 302, and a filter cartridge bracket 303 sealingly connected to the inner wall of the outer cylinder 107. The outer wall of the filter screen 301 is provided with an automatic cleaning device 2 powered by the flow force of the water inlet 101.

[0017] like Figure 2 As shown, the automatic cleaning device 2 includes a turbine 201 arranged in the same horizontal direction as the water inlet 101, a conical collecting cylinder 206 connected to the turbine 201 for collecting and cleaning dirt, the top of the conical collecting cylinder 206 is connected to a U-shaped brush rack 204 vertically arranged between the filter device 3 and the inner wall of the outer cylinder 107, and a brush 205 for cleaning the outer wall of the filter device 3 to prevent clogging is provided on the U-shaped brush rack 204. A guide port 207 for transporting the collected dirt to the bottom of the outer cylinder 107 is provided at the connection between the turbine 201 and the conical collecting cylinder 206, and a connecting rod 203 is provided on the turbine 201, which is fixedly connected to the outer cylinder 107 through a crossbeam 208.

[0018] A flushing device 4 is installed within the filter cartridge 302 for spraying the filter device 3 from the inside out. This flushing device 4 includes a water inlet pipe 105 and multiple flushing pipes 401 connected to the water inlet pipe 105 and vertically arranged within the filter cartridge 302. The flushing pipes 401 are provided with flushing holes that increase water pressure for flushing the filter cartridge 302. The pressure detection device 108 activates the flushing device 4 by detecting the pressure between the water inlet 101 and the water outlet 102, spraying the filter device 3 from the inside out.

[0019] A magnetic device 304 for removing metal impurities and a sewage outlet 103 are provided at the bottom of the inner wall of the outer cylinder 107 , and an air outlet valve 106 and an inspection port 104 are provided at the top.

[0020] During use, alkali liquid enters through the water inlet 101, and magnetic impurities are collected by the magnetic device 304 at the bottom. After being filtered by the filter device 3, the liquid flows out from the water outlet 102 at the top of the cylinder. The impact of the alkali liquid flow drives the turbine 201 to rotate, which in turn drives the brush 205 to clean the outer wall of the filter device 3. Under the action of centrifugal force, the cleaned dirt is transported to the bottom of the cylinder along the conical collection cylinder 206 and the guide port 207 for regular treatment. The pressure detection device 108 activates the flushing device 4 by detecting the pressure between the water inlet 101 and the water outlet 102, spraying the filter device 3 from the inside out, further ensuring the cleanliness of the filter device 3 and improving its filtration efficiency, thereby improving the working efficiency of the electrolytic cell.

Claims

1. A self-cleaning alkali solution filter for a water electrolysis hydrogen production system, comprising an outer cylinder (107) and a filtering device (3) connected to the inner wall of the outer cylinder (107) to divide the outer cylinder (107) into a filtered area and an unfiltered area; characterized in that: An automatic cleaning device (2) is provided on the outer wall of the filtering device (3) and is powered by the fluid of the water inlet (101); the automatic cleaning device (2) comprises a turbine (201) arranged in the same horizontal direction as the water inlet (101), a conical collecting cylinder (206) connected to the turbine (201) and used for collecting and cleaning dirt, the top end of the conical collecting cylinder (206) being connected to a U-shaped brush holder (204) vertically arranged between the filtering device (3) and the inner wall of the outer cylinder (107), and a brush (205) for cleaning the outer wall of the filtering device (3) and preventing clogging is provided on the U-shaped brush holder (204).

2. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 1, characterized in that: A magnetic attraction device (304) for removing metal impurities is provided at the bottom of the inner wall of the outer cylinder (107).

3. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 1, characterized in that: The filtering device (3) comprises a filter cartridge (302), a filter screen (301) wrapped around the outer wall of the filter cartridge (302), and a filter cartridge bracket (303) sealingly connected to the inner wall of the outer cylinder (107).

4. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 3, characterized in that: The filter cartridge (302) is provided with a flushing device (4) for spraying and washing the filter device (3) from the inside out.

5. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 4, characterized in that: The flushing device (4) comprises a water inlet pipe (105) and a plurality of flushing pipes (401) connected to the water inlet pipe (105) and vertically arranged in the filter cartridge (302); the flushing pipes (401) are provided with flushing holes for increasing water pressure to flush the filter cartridge (302).

6. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 4, characterized in that: The flushing device (4) further comprises a pressure detection device (108) for detecting the pressure between the water inlet (101) and the water outlet (102) and starting the operation thereof.

7. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 1, characterized in that: A connecting rod (203) is provided on the turbine (201), and the connecting rod (203) is fixedly connected to the outer cylinder (107) via a crossbeam (208).

8. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 1 or 7, characterized in that: A guide port (207) is provided at the connection between the turbine (201) and the conical collecting cylinder (206) for conveying the collected dirt to the bottom of the outer cylinder (107).

9. The self-cleaning alkali solution filter of the electrolysis water hydrogen production system according to claim 1, characterized in that: The outer cylinder (107) is provided with a sewage outlet (103) at the bottom and an air outlet valve (106) and an inspection port (104) at the top.

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