Hydrogen purification process and equipment

Abstract

The invention relates to the technical field of hydrogen purification, in particular to a hydrogen purification process and equipment, which comprises a gas-water separator, a deaerator, a cooler, a water separator, a drying tower, a filter and a cooling and water-gas separator, the gas-water separator is communicated with the deaerator; the deaerator is communicated with the cooler; the cooler is communicated with the water separator; the water separator is communicated with three groups of drying towers which are arranged in parallel; the three groups of drying towers are communicated with the filter; the cooling and water-gas separator is communicated with the three groups of drying towers; the hydrogen purification and the regeneration effect of the hydrogen on the drying tower are realized, and the regenerated hydrogen is recycled, purified and reused, so that the waste of the hydrogen is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of hydrogen purification, and in particular to a hydrogen purification process and equipment. Background Technology

[0002] As the global energy structure shifts towards low-carbon and clean energy, hydrogen energy, with its zero carbon emissions, high energy density, and renewability, is considered one of the most promising clean energy sources of the 21st century. In the electronics industry, high-purity hydrogen is an essential raw material for key processes such as semiconductor manufacturing and optical fiber production; in the chemical industry, pure hydrogen can improve the selectivity and yield of reactions such as ammonia synthesis and methanol synthesis. Therefore, hydrogen purification technology is the core support for the large-scale application of hydrogen energy, and its development level directly restricts breakthroughs in the economic viability of hydrogen energy.

[0003] Currently, among existing hydrogen purification devices, such as the patent with publication number CN221514044U, this utility model provides a hydrogen purification device. The hydrogen purification device provided by this utility model includes a working tower, a hydrogen pipeline, and an evaporation pipeline; the working tower is connected to both the hydrogen pipeline and the evaporation pipeline; the working tower includes a hydrogen purification mode and a regeneration mode.

[0004] During the use of existing equipment, it was found that after the existing equipment absorbs moisture from the hydrogen, the regeneration of the adsorbent or molecular sieve in the equipment is not convenient. It is not convenient to recover, purify, dry and reuse the regenerated hydrogen, which increases the waste of hydrogen and production costs. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a hydrogen purification process and equipment that purifies hydrogen, utilizes hydrogen to regenerate a drying tower, and recycles and purifies the regenerated hydrogen for reuse, thereby reducing hydrogen waste and lowering production costs.

[0006] The present invention provides a hydrogen purification device, comprising a gas-water separator, a deoxygenator, a cooler, a water separator, a drying tower, a filter, and a cooling and water-gas separator; The gas-liquid separator is connected to the deaerator; The deaerator is connected to the cooler; The cooler is connected to the water separator; The water separator is connected to three sets of drying towers arranged in parallel; The three drying towers are connected to the filters; The cooling and water-gas separator is connected to three sets of drying towers. Raw material hydrogen from the alkaline water electrolysis unit is introduced into the gas-water separator, which removes entrained liquid water and some mist-like moisture, yielding pre-dehydrated raw material hydrogen. This raw material hydrogen is then sent to a deoxygenator, where, under the action of a catalyst, the oxygen in the hydrogen reacts with the hydrogen to generate water vapor, yielding deoxygenated wet hydrogen. This wet hydrogen is then sent to a cooler for cooling, condensing the water vapor into saturated water. Subsequently, a water separator separates the condensate from the hydrogen, yielding desaturated hydrogen. This desaturated hydrogen is then sent to the operating drying tower among the three parallel drying towers. The molecular sieves within the operating drying tower are used to precipitate the hydrogen... The residual moisture in the product hydrogen is adsorbed, and then the product hydrogen is filtered through a filter before being discharged. 20% of the product hydrogen is sent as regeneration gas to the drying tower in the regeneration state to regenerate the drying tower. After regeneration, the 20% hydrogen discharged from the regeneration is cooled and separated from the water by a water-gas separator before being sent to the drying tower in the auxiliary state. The drying tower in the auxiliary state removes moisture from the regenerated hydrogen, thus enabling the regeneration gas to be recycled into product hydrogen. By having the three sets of drying towers alternately switch between different working states, regeneration states, and auxiliary states, the purification of hydrogen and the regeneration effect of hydrogen on the drying tower are achieved. The regenerated hydrogen is also recycled, purified, and reused, reducing hydrogen waste and lowering production costs.

[0007] Preferably, the drying tower includes an air intake and exhaust assembly, a sealing device, a vibration device, a cylinder, a heat-conducting inner liner, an electric heating tube, a breathable mesh box, a corrugated pipe, and a collection box; The cylinder has openings at both the top and bottom ends; The heat-conducting inner liner is located inside the cylinder; The heating element is installed between the heat-conducting inner liner and the cylinder. The breathable mesh box is slidably installed on the inner wall of the heat-conducting inner liner. Two sets of corrugated pipes are connected and installed at the upper and lower ends of the ventilated mesh box, respectively. The upper corrugated pipe is connected to the top opening of the cylinder, and the lower corrugated pipe is connected to the bottom opening of the cylinder. The collection box is located at the bottom of the cylinder, and the collection box is connected to the bottom opening of the cylinder; The intake and exhaust assembly is connected and installed on the cylinder, and the intake and exhaust assembly is used to transport hydrogen. The sealing device is installed at the opening at the top of the cylinder; A vibration device is installed between the cylinder and the permeable mesh box. Molecular sieves are introduced into the permeable mesh box through the top opening of the cylinder. Hydrogen gas saturated with water is then transported into the cylinder via the air intake and exhaust assembly. The desaturated hydrogen gas then passes through the permeable mesh box, where the molecular sieve adsorbs and removes moisture. The desaturated hydrogen gas is then discharged through the air intake and exhaust assembly, thus purifying the hydrogen. When regeneration of the molecular sieves in the permeable mesh box is required, the heat-conducting inner liner is heated via an electric heating element, allowing heat conduction between the inner liner and the permeable mesh box. Molecular sieves are heated, releasing adsorbed moisture. After regeneration, 20% hydrogen is introduced from the bottom of the cylinder as regeneration gas. The hydrogen passes through the inside of the cylinder to cool it down, while simultaneously carrying away the released moisture, thus completing the cooling and regeneration of the drying tower. The discharged hydrogen gas containing moisture enters the drying tower in an auxiliary state, where the molecular sieves in the auxiliary drying tower are used again to remove moisture, thus completing the use of regeneration gas. The sealing device is opened periodically to facilitate the removal and replacement of the molecular sieves in the permeable mesh box.

[0008] Preferably, the intake and exhaust assembly includes a first annular exhaust pipe, a second annular exhaust pipe, a first tee pipe, a first valve, a delivery pipe, a second valve, a second tee pipe, a third valve, and a fourth valve; The first annular exhaust pipe and the second annular exhaust pipe are respectively installed at the bottom of the cylinder; The output end of the first three-way pipe is connected to the first annular exhaust pipe; The two sets of first valves are connected and installed at the input end of the first tee pipe; The output end of the delivery pipe is connected to the second annular exhaust pipe; The second valve is connected to the delivery pipe; The second three-way pipe and the fourth valve are respectively connected and installed at the top of the cylinder; Two sets of third valves are respectively connected to the output end of the second three-way pipe; hydrogen gas with saturated water removed is transported to the inside of the first annular exhaust pipe through the first three-way pipe and the first set of first valves. Then, the hydrogen gas with saturated water removed passes through the cylinder to remove moisture and is discharged through the second three-way pipe and the first set of third valves. When the drying tower is regenerated, regenerated gas is transported to the inside of the cylinder through the conveying pipe and the second valve. Then, the regenerated gas with water is discharged through the fourth valve. When the drying tower is in auxiliary state, the regenerated gas with water is transported to the inside of the cylinder through the first three-way pipe and the second set of first valves. After the regenerated gas with water is dried in the cylinder, it is discharged through the second three-way pipe and the second set of third valves, thus realizing the convenience of discharging different gases separately under different working conditions.

[0009] Preferably, the vibration device includes a support, a tie rod, a spring, and a vibration motor; Multiple support brackets are installed at the top of the ventilated mesh cage; The tops of multiple sets of tie rods are connected to the inner side wall of the cylinder, and multiple sets of brackets are slidably installed on the multiple sets of tie rods. Multiple sets of springs are respectively fitted onto multiple sets of tie rods; Multiple sets of vibration motors are installed on the outer wall of the breathable mesh box. By turning on the multiple sets of vibration motors, the multiple sets of vibration motors drive the breathable mesh box to vibrate up and down through the springs, which improves the smoothness of the molecular sieve discharge in the breathable mesh box, and at the same time facilitates the vibration and compaction of the molecular sieve added to the breathable mesh box.

[0010] Preferably, the sealing device includes a sealing cover, a worm gear, a worm, and a drive motor; The sealing cap is installed at the top opening of the cylinder and is rotated onto the outer wall of the cylinder. The worm gear is mounted on the rotating end of the sealing cover; The worm gear is rotatably mounted on the cylinder and meshes with the worm wheel; The drive motor is mounted on the cylinder and connected to the worm gear; the drive motor drives the worm gear to rotate, which in turn drives the sealing cover to rotate and open via the worm wheel, thus facilitating the addition of molecular sieves into the breathable mesh box.

[0011] Preferably, it also includes a baffle and an electric cylinder; The baffle is slidably installed at the bottom end of the cylinder and is located at the bottom opening of the cylinder; The electric cylinder is installed on the outer wall of the cylinder, and the moving end of the electric cylinder is connected to the baffle. By controlling the extension and retraction of the electric cylinder, the electric cylinder drives the baffle to slide, which improves the convenience of opening and closing the bottom opening of the cylinder. After the bottom opening of the cylinder is opened, the molecular sieve in the breathable mesh box is discharged through the collection box, which improves the convenience of discharging and replacing the molecular sieve in the breathable mesh box.

[0012] Preferably, it also includes a base and a telescopic rod; Multiple bases are installed on the inner side wall of the cylinder; Multiple sets of telescopic rods are installed between multiple bases and the bottom of the breathable mesh box; when the breathable mesh box vibrates up and down, it is guided and supported by multiple sets of telescopic rods, thereby improving the guiding stability of the breathable mesh box.

[0013] Preferably, it also includes a cover; The cover is installed at the top of the cylinder and covers the worm gear, worm, and drive motor to improve their protection.

[0014] Preferably, a hydrogen purification process includes the following steps: S1. The raw material hydrogen from the alkaline water electrolysis device is introduced into the gas-liquid separator. The gas-liquid separator removes the liquid water and some mist water entrained in the raw material hydrogen to obtain preliminarily dehydrated raw material hydrogen. S2. The obtained raw hydrogen gas is transported to the deoxygenator. Under the action of the catalyst, the oxygen contained in the hydrogen gas reacts with the hydrogen gas to generate water vapor, and the deoxygenated wet hydrogen gas is obtained. S3. The wet hydrogen gas is delivered to the cooler for cooling, so that the water vapor in it condenses into saturated water. S4. The condensate and hydrogen are separated by a water separator to obtain hydrogen gas with saturated water removed. S5. The hydrogen gas after removing saturated water is transported to the working drying tower of the three parallel drying towers. The molecular sieve in the working drying tower is used to adsorb the residual water in the hydrogen gas. Then the product hydrogen gas is discharged after being filtered by the filter. S6. 20% of the product hydrogen is transported as regeneration gas to the drying tower in the regeneration state for regeneration of the drying tower. S7. After regeneration is completed, the 20% hydrogen emitted during regeneration is cooled and separated from the water by a water-gas separator before being transported to a drying tower in an auxiliary state. The drying tower in an auxiliary state removes the moisture from the regenerated hydrogen, thereby enabling the regenerated gas to be recycled into product hydrogen.

[0015] Preferably, in step S5, moisture is adsorbed by the molecular sieve, and the dew point of hydrogen is reduced to -70°C, meeting the requirements of continuous production.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 20% of the product hydrogen is transported as regeneration gas to the drying tower in the regeneration state for regeneration of the drying tower. After regeneration, the 20% hydrogen emitted during regeneration is cooled and separated into gas and water by a water-gas separator before being transported to the drying tower in the auxiliary state. The moisture in the regenerated hydrogen is removed by the drying tower in the auxiliary state, thereby forming product hydrogen from the regenerated gas for recycling. By having the three sets of drying towers alternately switch between different working states, regeneration states, and auxiliary states, the purification of hydrogen and the regeneration effect of hydrogen on the drying tower are achieved. The hydrogen after regeneration is recycled, purified, and reused, reducing hydrogen waste and lowering production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 It is an isometric structural diagram of the connection between the cylinder and the collection box, etc. Figure 3 This is an isometric structural diagram of the connection between the cylinder and the heat-conducting inner liner, etc. Figure 4 This is a partial isometric structural diagram of the connection between the breathable mesh box and the corrugated pipe, etc. Figure 5 This is a partial isometric structural diagram of the connection between the sealing cover and the worm gear, etc. Figure 6 This is a partial isometric structural diagram of the connection between the delivery pipe and the second valve, etc. Figure 7 This is a partial isometric structural diagram of the connection between the first annular exhaust pipe and the first tee pipe, etc. Figure 8 This is a partial isometric structural diagram of the connection between the baffle and the electric cylinder, etc. Figure 9 This is an isometric structural diagram of the connection between the first valve and the first tee pipe, etc. Figure 10 This is a partial isometric structural diagram showing the connection between the base and the telescopic rod, etc.

[0018] In the attached diagram, the following labels are used: 101, gas-water separator; 102, deaerator; 103, cooler; 104, water separator; 105, drying tower; 106, filter; 107, cooling and water-gas separator; 201, cylinder; 202, heat-conducting inner liner; 203, electric heating element; 204, breathable mesh box; 205, corrugated pipe; 206, collection box; 301, first annular exhaust pipe; 302, second annular exhaust pipe; 303, first tee pipe. 304. First valve; 305. Conveying pipe; 306. Second valve; 307. Second tee pipe; 308. Third valve; 309. Fourth valve; 401. Support; 402. Pull rod; 403. Spring; 404. Vibration motor; 501. Sealing cover; 502. Worm gear; 503. Worm; 504. Drive motor; 601. Baffle; 602. Electric cylinder; 701. Base; 702. Telescopic rod; 801. Cover. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0020] Example 1 like Figures 1 to 10 As shown, a hydrogen purification device of the present invention includes a gas-water separator 101, a deoxygenator 102, a cooler 103, a water separator 104, a drying tower 105, a filter 106, and a cooling and water-gas separator 107. The gas-liquid separator 101 is connected to the deaerator 102; Deaerator 102 is connected to cooler 103; Cooler 103 is connected to water separator 104; Water separator 104 is connected to three sets of drying towers 105 arranged in parallel; The three drying towers 105 are connected to the filter 106; The cooling and water-air separator 107 is connected to three sets of drying towers 105; The drying tower 105 includes an air intake and exhaust assembly, a sealing device, a vibration device, a cylinder 201, a heat-conducting inner liner 202, an electric heating tube 203, a breathable mesh box 204, a corrugated pipe 205, and a collection box 206. The cylinder 201 has openings at both the top and bottom ends; The heat-conducting inner liner 202 is located inside the cylinder 201; The heating element 203 is disposed between the heat-conducting inner liner 202 and the cylinder 201; The breathable mesh box 204 is slidably installed on the inner wall of the heat-conducting inner liner 202; Two sets of corrugated pipes 205 are respectively connected to the upper and lower ends of the ventilated mesh box 204. The upper corrugated pipe 205 is connected to the top opening of the air cylinder 201, and the lower corrugated pipe 205 is connected to the bottom opening of the cylinder 201. The collection box 206 is located at the bottom of the cylinder 201, and the collection box 206 is connected to the bottom opening of the cylinder 201; The intake and exhaust assembly is connected to the cylinder 201 and is used to transport hydrogen. The sealing device is installed at the top opening of the cylinder 201; The vibration device is installed between the cylinder 201 and the ventilated mesh box 204; In this embodiment, raw hydrogen from an alkaline water electrolysis device is introduced into a gas-liquid separator 101. The gas-liquid separator 101 removes liquid water and some mist-like moisture entrained in the raw hydrogen, obtaining pre-dehydrated raw hydrogen. The obtained raw hydrogen is then transported to a deoxygenator 102, where, under the action of a catalyst, the oxygen contained in the hydrogen reacts with the hydrogen to generate water vapor, resulting in deoxygenated wet hydrogen. The wet hydrogen is then transported to a cooler 103 for cooling, causing the water vapor to condense into saturated water. Subsequently, the condensate is separated from the hydrogen by a water separator 104, obtaining desaturated hydrogen. The desaturated hydrogen is then transported to one of three parallel drying towers 105 in operation. The molecular sieve within the operating drying tower 105 is used to remove residual water from the hydrogen. The hydrogen is adsorbed and then filtered through filter 106 before being discharged. 20% of the product hydrogen is used as regeneration gas and sent to the drying tower 105 in the regeneration state to regenerate the drying tower 105. After regeneration, the 20% hydrogen discharged from the regeneration is cooled and separated into gas and water by water separator 107 before being sent to the drying tower 105 in the auxiliary state. The drying tower 105 in the auxiliary state removes the moisture from the regenerated hydrogen, thus forming product hydrogen for recycling. By having the three sets of drying towers 105 alternately switch between different working states, regeneration states, and auxiliary states, the purification of hydrogen and the regeneration effect of hydrogen on the drying tower 105 are achieved. The regenerated hydrogen is also recycled, purified, and reused, reducing hydrogen waste and lowering production costs.

[0021] Example 2 Based on Example 1, the present invention provides a hydrogen purification device, wherein the inlet and outlet components include a first annular exhaust pipe 301, a second annular exhaust pipe 302, a first three-way pipe 303, a first valve 304, a delivery pipe 305, a second valve 306, a second three-way pipe 307, a third valve 308, and a fourth valve 309. The first annular exhaust pipe 301 and the second annular exhaust pipe 302 are respectively installed at the bottom of the inner cylinder 201; The output end of the first three-way pipe 303 is connected to the first annular exhaust pipe 301; Two sets of first valves 304 are connected and installed on the input end of the first tee pipe 303; The output end of the delivery pipe 305 is connected to the second annular exhaust pipe 302; The second valve 306 is connected to the delivery pipe 305; The second three-way pipe 307 and the fourth valve 309 are respectively connected and installed at the top of the cylinder 201; The two sets of third valves 308 are respectively connected to the output end of the second three-way pipe 307; The vibration device includes a bracket 401, a pull rod 402, a spring 403, and a vibration motor 404; Multiple sets of brackets 401 are all installed at the top of the ventilated mesh box 204; The tops of multiple sets of tie rods 402 are all connected to the inner wall of the cylinder 201, and multiple sets of brackets 401 are slidably installed on the multiple sets of tie rods 402 respectively. Multiple sets of springs 403 are respectively fitted onto multiple sets of pull rods 402; Multiple sets of vibration motors 404 are installed on the outer wall of the ventilated mesh box 204; The sealing device includes a sealing cover 501, a worm gear 502, a worm 503, and a drive motor 504; The sealing cover 501 is installed on the top opening of the cylinder 201 and is rotatably installed on the outer wall of the cylinder 201. The worm gear 502 is mounted on the rotating end of the sealing cover 501; The worm gear 503 is rotatably mounted on the cylinder 201 and meshes with the worm wheel 502; The drive motor 504 is mounted on the cylinder 201 and connected to the worm gear 503; It also includes baffle 601 and electric cylinder 602; The baffle 601 is slidably installed at the bottom end of the cylinder 201 and is located at the bottom opening of the cylinder 201; The electric cylinder 602 is installed on the outer wall of the cylinder 201, and the moving end of the electric cylinder 602 is connected to the baffle 601. It also includes a base 701 and a telescopic rod 702; Multiple sets of bases 701 are installed on the inner wall of the cylinder 201; Multiple sets of telescopic rods 702 are respectively installed between multiple sets of bases 701 and the bottom of the breathable mesh box 204; It also includes the cover 801; The cover 801 is installed on the top of the cylinder 201 and covers the outside of the worm gear 502, worm 503 and drive motor 504; In this embodiment, the molecular sieve is introduced into the breathable mesh box 204 through the top opening of the cylinder 201. Hydrogen gas saturated with water is transported into the cylinder 201 through the air intake and exhaust assembly. The desaturated hydrogen gas then passes through the breathable mesh box 204, where the molecular sieve adsorbs and removes moisture. The desaturated hydrogen gas is then discharged through the air intake and exhaust assembly, thus purifying the hydrogen. When regeneration of the molecular sieve in the breathable mesh box 204 is required, the heat is transferred through the heating element 203. The inner liner 202 is heated, and the heat-conducting inner liner 202 and the breathable mesh box 204 are heated through the heat-conducting molecular sieve. After the molecular sieve is heated, it releases the adsorbed moisture. After the molecular sieve is regenerated, 20% hydrogen gas is introduced from the bottom of the cylinder 201 as regeneration gas. The hydrogen gas passes through the inside of the cylinder 201 to cool it down, and at the same time, the hydrogen gas carries away the released moisture, thus completing the cooling and regeneration of the drying tower 105. The discharged hydrogen gas containing moisture enters the drying tower 105 in the auxiliary state, and the auxiliary state drying gas is used again. Molecular sieves inside drying tower 105 remove moisture, thus enabling the use of regenerated gas. Periodically opening the sealing device facilitates the removal and replacement of the molecular sieves in the permeable mesh box 204. Hydrogen gas, after saturation removal, is transported to the first annular exhaust pipe 301 via the first three-way pipe 303 and the first set of first valves 304. Subsequently, the dehydrated hydrogen gas passes through the cylinder 201 to remove moisture and is discharged via the second three-way pipe 307 and the first set of third valves 308. When drying tower 105 is regenerating, regenerated gas is transported to the cylinder 201 via the conveying pipe 305 and the second valve 306. The regenerated gas containing water is then discharged via the fourth valve 309. When drying tower 105 is in auxiliary mode, regenerated gas containing water is transported to the cylinder 201 via the first three-way pipe 303 and the second set of first valves 304. After drying inside the cylinder 201, the regenerated gas containing water is discharged via the second three-way pipe 307 and the second set of third valves 308, thus achieving the convenience of discharging different gases separately under different operating conditions.

[0022] Example 3 The present invention provides a hydrogen purification process, comprising the following steps: S1. The raw material hydrogen from the alkaline water electrolysis device is introduced into the gas-water separator 101. The gas-water separator 101 removes the liquid water and some mist water entrained in the raw material hydrogen to obtain preliminarily dehydrated raw material hydrogen. S2. The obtained raw hydrogen gas is transported to the deoxidizer 102. Under the action of the catalyst, the oxygen contained in the hydrogen gas reacts with the hydrogen gas to generate water vapor, and the deoxygenated wet hydrogen gas is obtained. S3. The wet hydrogen gas is delivered to the cooler 103 for cooling, so that the water vapor in it is condensed into saturated water. S4. The condensate and hydrogen are separated by the water separator 104 to obtain hydrogen gas with saturated water removed. S5. The hydrogen gas after removing saturated water is transported to the working drying tower 105 in one of the three parallel drying towers 105. The molecular sieve in the working drying tower 105 is used to adsorb the residual water in the hydrogen gas. Then the product hydrogen gas is discharged after being filtered by the filter 106. S6. 20% of the product hydrogen is transported as regeneration gas to the drying tower 105 in the regeneration state for regeneration of the drying tower 105. S7. After regeneration is completed, the 20% hydrogen emitted during regeneration is cooled and separated from the water by the water-gas separator 107 and then transported to the drying tower 105 in the auxiliary state. The drying tower 105 in the auxiliary state removes the moisture from the regenerated hydrogen, thereby forming product hydrogen from the regenerated gas for recycling. In step S5, moisture is adsorbed by the molecular sieve, and the dew point of hydrogen is reduced to -70°C, meeting the requirements of continuous production.

[0023] The main functions achieved by this invention are: 1. The 20% hydrogen emitted during regeneration is cooled and separated into gas and water by the gas-water separator 107, and then transported to the drying tower 105 in the auxiliary state. The drying tower 105 removes the moisture from the regenerated hydrogen, thereby enabling the regenerated gas to be recycled into product hydrogen, reducing hydrogen waste and lowering production costs. 2. Improve the convenience of molecular sieve replacement operations.

[0024] The vibration motor 404, drive motor 504, and electric cylinder 602 of the hydrogen purification process and equipment of the present invention are commercially available. Technical personnel in the industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0025] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A hydrogen purification device, characterized in that, It includes a gas-water separator (101), a deaerator (102), a cooler (103), a water separator (104), a drying tower (105), a filter (106), and a cooling and water-gas separator (107). The gas-liquid separator (101) is connected to the deaerator (102); The deaerator (102) is connected to the cooler (103); The cooler (103) is connected to the water separator (104); The water separator (104) is connected to three sets of drying towers (105) arranged in parallel; The three drying towers (105) are connected to the filter (106); The cooling and water-air separator (107) is connected to three sets of drying towers (105).

2. The hydrogen purification device as described in claim 1, characterized in that, The drying tower (105) includes an air intake and exhaust assembly, a sealing device, a vibration device, a cylinder (201), a heat-conducting inner liner (202), an electric heating tube (203), a breathable mesh box (204), a corrugated pipe (205), and a collection box (206). The cylinder (201) has openings at both the top and bottom ends; A heat-conducting inner liner (202) is installed inside the cylinder (201); The heating element (203) is disposed between the heat-conducting inner liner (202) and the cylinder (201); The breathable mesh box (204) is slidably installed on the inner wall of the heat-conducting inner liner (202); Two sets of corrugated pipes (205) are respectively connected to the upper and lower ends of the ventilated mesh box (204). The upper corrugated pipe (205) is connected to the top opening of the cylinder (201), and the lower corrugated pipe (205) is connected to the bottom opening of the cylinder (201). The collection box (206) is located at the bottom of the cylinder (201), and the collection box (206) is connected to the bottom opening of the cylinder (201); An intake and exhaust assembly is connected to the cylinder (201) and is used to transport hydrogen. The sealing device is installed at the top opening of the cylinder (201); The vibration device is installed between the cylinder (201) and the ventilated mesh box (204).

3. The hydrogen purification device as described in claim 2, characterized in that, The intake and exhaust assembly includes a first annular exhaust pipe (301), a second annular exhaust pipe (302), a first three-way pipe (303), a first valve (304), a delivery pipe (305), a second valve (306), a second three-way pipe (307), a third valve (308), and a fourth valve (309). The first annular exhaust pipe (301) and the second annular exhaust pipe (302) are respectively installed at the bottom of the cylinder (201); The output end of the first three-way pipe (303) is connected to the first annular exhaust pipe (301); The two sets of first valves (304) are connected and installed at the input end of the first tee pipe (303); The output end of the delivery pipe (305) is connected to the second annular exhaust pipe (302); The second valve (306) is connected to the delivery pipe (305); The second three-way pipe (307) and the fourth valve (309) are respectively connected to the top of the cylinder (201); The two sets of third valves (308) are respectively connected to the output end of the second three-way pipe (307).

4. The hydrogen purification device as described in claim 2, characterized in that, The vibration device includes a bracket (401), a pull rod (402), a spring (403), and a vibration motor (404). Multiple sets of supports (401) are all set at the top of the ventilated mesh box (204); The top ends of multiple sets of tie rods (402) are all connected to the inner side wall of the cylinder (201), and multiple sets of brackets (401) are slidably installed on the multiple sets of tie rods (402) respectively; Multiple sets of springs (403) are respectively fitted onto multiple sets of tie rods (402); Multiple sets of vibration motors (404) are installed on the outer wall of the ventilated mesh box (204).

5. The hydrogen purification device as described in claim 2, characterized in that, The sealing device includes a sealing cover (501), a worm gear (502), a worm (503), and a drive motor (504). The sealing cap (501) is installed at the top opening of the cylinder (201) and is rotated on the outer wall of the cylinder (201); The worm gear (502) is mounted on the rotating end of the sealing cover (501); The worm (503) is rotatably mounted on the cylinder (201) and meshes with the worm wheel (502); The drive motor (504) is mounted on the cylinder (201) and connected to the worm gear (503).

6. The hydrogen purification device as described in claim 2, characterized in that, It also includes a baffle (601) and an electric cylinder (602); The baffle (601) is slidably installed at the bottom end of the cylinder (201) and is located at the bottom opening of the cylinder (201); The electric cylinder (602) is installed on the outer wall of the cylinder (201), and the moving end of the electric cylinder (602) is connected to the baffle (601).

7. The hydrogen purification device as described in claim 2, characterized in that, It also includes a base (701) and a telescopic rod (702); Multiple sets of bases (701) are installed on the inner wall of the cylinder (201); Multiple sets of telescopic rods (702) are installed between multiple sets of bases (701) and the bottom of the breathable mesh box (204).

8. The hydrogen purification device as described in claim 5, characterized in that, It also includes the cover (801); The cover (801) is installed on the top of the cylinder (201) and covers the outside of the worm gear (502), worm (503) and drive motor (504).

9. A hydrogen purification process, characterized in that, Includes the following steps: S1. The raw material hydrogen from the alkaline water electrolysis device is introduced into the gas-water separator (101). The gas-water separator (101) removes the liquid water and some mist water entrained in the raw material hydrogen to obtain preliminarily dehydrated raw material hydrogen. S2. The obtained raw hydrogen gas is transported to the deoxygenator (102). Under the action of the catalyst, the oxygen contained in the hydrogen gas reacts with the hydrogen gas to generate water vapor, and the deoxygenated wet hydrogen gas is obtained. S3. The wet hydrogen gas is delivered to the cooler (103) for cooling, so that the water vapor in it is condensed into saturated water; S4. The condensate and hydrogen are separated by a water separator (104) to obtain hydrogen gas with saturated water removed. S5. The hydrogen gas after removing saturated water is transported to the working drying tower (105) of the three parallel drying towers (105). The molecular sieve in the working drying tower (105) is used to adsorb the residual water in the hydrogen gas. Then the product hydrogen gas is discharged after being filtered by the filter (106). S6. 20% of the product hydrogen is transported as regeneration gas to the drying tower (105) in the regeneration state for regeneration of the drying tower (105); S7. After regeneration is completed, the 20% hydrogen emitted during regeneration is cooled and separated into gas and water by a water-gas separator (107) and then transported to a drying tower (105) in an auxiliary state. The drying tower (105) in an auxiliary state removes the moisture from the regenerated hydrogen, thereby enabling the regenerated gas to be recycled into product hydrogen.

10. A hydrogen purification process as described in claim 9, characterized in that, In step S5, moisture is adsorbed by the molecular sieve, and the dew point of hydrogen is reduced to -70°C, meeting the requirements of continuous production.

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