A hydrogen separation and purification device and method for hydrogen production by high-temperature water electrolysis

Abstract

This invention belongs to the field of hydrogen separation and purification, specifically relating to a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production. It includes a pre-compression cylinder housed within the inner cavity of a separation cylinder. A hammer baffle assembly is fitted inside the pre-compression cylinder, with the hammer head of the baffle assembly fitted against the inner wall of the pre-compression cylinder and slidably connected within the cylinder's inner cavity. A hammer head and a baffle are fixedly connected to both ends of a crossbar, respectively. The top of the pre-compression cylinder is connected to an inlet pipe, and a support cylinder is fixedly connected to the bottom of the pre-compression cylinder. The baffle is fitted against the inner wall of the support cylinder and slidably connected within its inner cavity. This invention avoids instability in air pressure and flow rate when the high-temperature mixed gas from the electrolyzer is fed into the condensation space due to fluctuations in electrolysis conditions, enhancing the stability of condensation temperature control and improving condensation efficiency. It also ensures that impurity gases are fully condensed before being carried out, improving the purity of the separated hydrogen.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen separation and purification, specifically relating to a hydrogen separation and purification device and method for high-temperature water electrolysis hydrogen production. Background Technology

[0002] Hydrogen is considered an ideal secondary energy source due to its cleanliness, high efficiency, and ease of storage and transportation. It is widely used in fuel cell vehicles, the electronics industry, and the chemical industry. As a secondary energy source, hydrogen needs to be produced from other energy sources. Common hydrogen production methods include coal gasification, natural gas reforming, biomass fermentation, and water electrolysis. In order to obtain relatively pure hydrogen, hydrogen separation is required during the hydrogen production process to remove impurities from the hydrogen-rich gas. Therefore, hydrogen separation devices are needed.

[0003] Chinese invention patent application number CN202011616376.7 discloses a high-purity hydrogen separation device, including a housing of the hydrogen separation device, a first accommodating cavity for holding water inside the housing, a first water inlet on the upper end face of the housing communicating with the first accommodating cavity, a first water outlet pipe at the bottom of the first accommodating cavity communicating with an electrolytic separation device, and the electrolytic separation device communicating with the interior of the first accommodating cavity through a second water outlet pipe, a first groove on the outer wall of the upper end of the housing, a first float slidably connected in the first groove, a first through hole communicating with the first accommodating cavity on the bottom surface of the first groove, a first end cap sealing the first groove at the upper opening, a second accommodating cavity for holding gas between the lower end face of the first end cap and the upper end face of the first float, the electrolytic separation device communicating with the second accommodating cavity through a third water outlet pipe, a first gas outlet on the lower end face of the first end cap for venting gas from the second accommodating cavity, and a control unit for controlling the drainage of the first accommodating cavity inside the first accommodating cavity, the control unit being higher than the bottom surface of the first groove.

[0004] However, existing hydrogen purification devices and methods for water electrolysis to produce hydrogen typically involve directly passing a high-temperature mixed gas into a cooling device for gradual condensation. This process condenses the oxygen, water vapor, gaseous impurities, and nitrogen mixed in the gas before releasing the purified hydrogen. The pressure and flow rate of the high-temperature mixed gas exiting the electrolyzer fluctuate with the electrolysis conditions. Directly introducing this fluctuating gas flow into the condensation chamber leads to unstable temperature control and low condensation efficiency. Furthermore, the continuous ventilation at the gas inlet results in insufficient residence time for some impurity gases within the condensation chamber, causing them to be carried out before full condensation and reducing hydrogen purity. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production. Through the coordination of a collection tank, an annular water tank, a mixing tank, and a connecting pipe mechanism, this invention reduces the volatilization of volatile organic compounds (VOCs) in the brine during collection and prevents blockages caused by excessively high brine concentrations. Furthermore, the coordination of a control mechanism with the connecting pipe mechanism and mixing tank avoids blockages caused by excessively high brine concentrations while ensuring that the brine concentration is not too low during collection, thus preventing interference with VOC collection. This invention, through the coordination of the control mechanism, connecting pipe mechanism, and mixing tank, is suitable for collecting organic matter from brine of unknown concentration.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hydrogen separation and purification device for high-temperature water electrolysis hydrogen production includes a pre-compression cylinder housed within the inner cavity of a separation cylinder. A hammer baffle assembly is fitted within the inner cavity of the pre-compression cylinder. The hammer head of the hammer baffle assembly is fitted against the inner wall of the pre-compression cylinder and slidably connected within the inner cavity of the pre-compression cylinder. A hammer head and a baffle are fixedly connected to both ends of a crossbar, respectively. The top of the pre-compression cylinder is connected to an inlet pipe, and the bottom of the pre-compression cylinder is fixedly connected to a support cylinder. The baffle is fitted against the inner wall of the support cylinder and slidably connected within the inner cavity of the support cylinder. The separation cylinder includes an inner cylinder and an outer cylinder. The outer wall of the inner cylinder is fixedly connected to the bottom of the outer cylinder, and a cooling cylinder is fixedly connected to the outer wall of the outer cylinder. The height of the outer cylinder is greater than the height of the inner cylinder. The space enclosed by the inner walls of the inner and outer cylinders together with the outer wall of the pre-compression cylinder forms a ventilation chamber. The space enclosed by the outer walls of the inner and outer cylinders forms a condensation chamber. The top of the outer cylinder is connected to an outlet pipe. The preload cylinder has multiple vent holes on its inner wall near the support cylinder, which are connected to the ventilation chamber.

[0007] Furthermore, six telescopic springs are circumferentially fixedly connected to the side of the baffle facing away from the crossbar, of which three telescopic springs are fixedly connected to the fixed semicircular plate of the pressure regulating component at the ends away from the baffle, and the outer edge of the fixed semicircular plate is fixedly connected to the inner wall of the support cylinder.

[0008] Furthermore, the pressure regulating assembly includes a rotating semicircular plate, the center of which is fixedly connected to one end of a rotating rod, the center of which is rotatably connected to one end of a rotating rod, and the other end of the rotating rod extends out of the bottom surface of the support cylinder and is fixedly connected to the center of the pressure regulating knob.

[0009] Furthermore, the pressure regulating knob is a hexagonal prism, and each of the six sides of the pressure regulating knob has a through hole.

[0010] Furthermore, the interlayer between the cooling cylinder and the outer cylinder is a liquid nitrogen chamber, the height of which is lower than the height of the condensation chamber, and the liquid nitrogen chamber is connected to a liquid nitrogen control pump.

[0011] Furthermore, the length of the vent hole is less than the length of the hammer head, and the sliding distance of the baffle along the support cylinder is greater than the length of the crossbar.

[0012] Furthermore, the separator includes a vent valve, and the top of the outer cylinder is connected to the vent pipe via the vent valve.

[0013] Furthermore, the separating cylinder includes a cylinder cover, which is sealed to the top of the separating cylinder. The cylinder cover has through holes for the air inlet pipe and the air outlet pipe to pass through. The air inlet pipe passes through the cylinder cover and connects to the top of the pre-compression cylinder.

[0014] Furthermore, the bottom of the support cylinder is circumferentially fixedly connected with three support legs.

[0015] This invention also claims a separation and purification method using the above-described hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production, comprising the following steps: S101: Rotate the pressure adjustment knob to the set angle. The rotating rod rotates, causing the rotating semicircular plate to rotate, changing the number of telescopic springs that oppose the rotating semicircular plate. S102: The mixed gas produced by high-temperature water electrolysis to produce hydrogen is continuously introduced into the upper space of the pre-compression cylinder through the air inlet pipe. The mixed gas squeezes and pushes the hammer baffle assembly, and the hammer head in the pre-compression cylinder slides downward along the length of the pre-compression cylinder. S103: When the hammer head slides to the vent hole at the bottom of the pre-compression cylinder, the vent chamber begins to connect with the upper part of the inner cavity of the pre-compression cylinder, and the mixed gas with a certain pre-compression is introduced into the vent chamber of the separator. S104: The mixed gas continues to flow inside the separator and from the ventilation chamber to the condensation chamber. Start the liquid nitrogen control pump to introduce liquid nitrogen into the liquid nitrogen chamber and cool the mixed gas in the condensation chamber. S105: The amount of liquid nitrogen flowing into the liquid nitrogen chamber is controlled by the temperature control and electrical control valve on the liquid nitrogen control pump, thereby accurately maintaining the temperature of the condensation chamber, so that various impurity gases in the hydrogen mixture condense while hydrogen does not condense. S106: During the condensation process, the gas pressure in the ventilation chamber, condensation chamber and pre-compression cylinder will gradually decrease until the pressure of the gas pressure on the top of the hammer head is less than the pressure of the crossbar on the bottom of the hammer head. Then the hammer head will slide upward, making the ventilation chamber and condensation chamber become a closed space again and no longer allow mixed gas to enter. S107: After condensing the various impurity gases in the mixed gas, open the valve of the gas outlet pipe at the top of the separator through the vent valve, and the purified hydrogen gas is discharged from the gas outlet pipe and introduced into the hydrogen tank for storage.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) This invention can achieve automatic pre-pressure when introducing mixed gas, avoiding the instability of air pressure and flow rate when the high-temperature mixed gas from the electrolytic cell is sent into the condensation space due to fluctuations in the electrolysis conditions, thus enhancing the control stability of the condensation temperature and improving the condensation efficiency; because before introducing the mixed gas, the rotating rod rotates, causing the rotating semicircular plate to rotate, changing the number of extension springs that abut against the rotating semicircular plate. The more extension springs that abut against the rotating semicircular plate, the larger the set automatic pre-pressure value; then the mixed gas produced by high-temperature water electrolysis to produce hydrogen is... The gas is continuously introduced into the pre-compression cylinder cavity through the inlet pipe, compressing and pushing the hammer baffle assembly. This causes the hammer head in the pre-compression cylinder cavity to slide downwards. When the hammer head slides to the vent at the bottom of the pre-compression cylinder, the venting chamber begins to connect with the upper part of the pre-compression cylinder cavity. The mixed gas with a certain pre-pressure is introduced into the venting chamber of the separator cylinder. The mixed gas continues to flow inside the separator cylinder and from the venting chamber to the condensation chamber. Liquid nitrogen is introduced into the liquid nitrogen chamber to cool the mixed gas in the condensation chamber. The gas first enters the closed space at the top of the pre-compression cylinder to accumulate pressure. This pressure build-up process smooths out upstream flow fluctuations. Only when the pressure is sufficient to overcome the preset resistance of the pressure regulating spring can the hammer baffle assembly be pushed downwards, and the vent is opened. This ensures that the gas entering the separation system has a stable initial pressure, providing stable pressure and flow for the subsequent condensation process, enhancing the control stability of the condensation temperature, and improving condensation efficiency.

[0017] (2) The present invention can ensure that the mixed gas has sufficient residence time in the condensation space while maintaining a continuous flow of mixed gas, so that the impurity gas is fully condensed and then carried out, thereby improving the purity of the hydrogen after separation. During the condensation process of the mixed gas entering the condensation chamber, the gas pressure in the ventilation chamber, condensation chamber, and pre-compression cylinder gradually decreases until the pressure on the top of the hammer is less than the pressure on the bottom of the hammer by the crossbar. At this point, the hammer slides upward, making the ventilation chamber and condensation chamber a sealed space again, preventing the introduction of mixed gas. This achieves automated batch processing in the hydrogen separation and purification process. In the gas inlet stage, after the gas pressure reaches the target, the hammer baffle assembly is pushed open, allowing the vent to open rapidly. Then, the high-pressure mixed gas quickly flows into the condensation chamber. In the closed condensation stage, after the gas enters the ventilation chamber and condensation chamber, condensation causes the gas volume inside the chamber to shrink drastically and the pressure to drop rapidly. When the pressure inside the chamber drops below the return force of the extension spring, the hammer baffle assembly automatically moves upward, closing the vent. At this point, the condensation chamber becomes a completely sealed reactor, allowing impurities sufficient time to condense and separate from the gas by gravity. This avoids the problem of impurity gas escaping in continuous flow mode. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention; Figure 2This is a schematic diagram of the overall structure of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention. Figure 3 This is a schematic diagram of the exploded structure of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention. Figure 4 This is a partial cross-sectional schematic diagram of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention. Figure 5 This is a partial exploded structural diagram of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention. Figure 1 ; Figure 6 This is a partial exploded structural diagram of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the pre-compression cylinder structure of a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to the present invention; Figure 8 This is a flowchart of a hydrogen separation and purification method using a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production, according to the present invention.

[0019] The attached figures are labeled as follows: 100. Pre-compression cylinder; 101. Air inlet pipe; 103. Vent hole; 200. Hammer stop assembly; 201. Hammer head; 202. Crossbar; 203. Baffle; 204. Telescopic spring; 300. Pressure regulating component; 301. Fixed semicircular plate; 302. Rotating semicircular plate; 303. Rotating rod; 304. Pressure regulating knob; 400. Support sleeve; 401. Support leg; 500. Separation cylinder; 501. Inner cylinder; 502. Outer cylinder; 503. Ventilation chamber; 504. Condensation chamber; 505. Cooling cylinder; 506. Liquid nitrogen chamber; 507. Vent pipe; 508. Vent valve; 509. Cylinder cover; 510. Liquid nitrogen control pump; 511. Drain pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0022] Example like Figures 1-8 As shown, a hydrogen separation and purification device for high-temperature water electrolysis hydrogen production includes a pre-compression cylinder 100, which is housed in the inner cavity of a separation cylinder 500. A hammer baffle assembly 200 is sleeved in the inner cavity of the pre-compression cylinder 100. The hammer head 201 of the hammer baffle assembly 200 is attached to the inner wall of the pre-compression cylinder 100 and slidably connected to the inner cavity of the pre-compression cylinder 100. The two ends of a crossbar 202 are respectively fixedly connected to the hammer head 201 and a baffle 203. The top of the pre-compression cylinder 100 is connected to an air inlet pipe 101. The bottom of the pre-compression cylinder 100 is fixedly connected to a support cylinder 400. The baffle 203 is attached to the inner wall of the support cylinder 400 and slidably connected to the inner cavity of the support cylinder 400. The separation cylinder 500 includes an inner cylinder 501 and an outer cylinder 502. The outer wall of the inner cylinder 501 is fixedly connected to the bottom of the outer cylinder 502. The outer wall of the outer cylinder 502 is fixedly connected to a cooling cylinder 505. The height of the outer cylinder 502 is higher than that of the inner cylinder 501. The space enclosed by the inner walls of the inner cylinder 501 and the outer wall of the outer cylinder 502 together with the outer wall of the pre-compression cylinder 100 is a venting chamber 503. The space enclosed by the outer walls of the inner cylinder 501 and the outer wall of the outer cylinder 502 is a condensation chamber 504. The top of the outer cylinder 502 is connected to an outlet pipe 507. The inner wall of the pre-compression cylinder 100 near the support cylinder 400 has multiple vent holes 103 circumferentially opened, which are connected to the venting chamber 503.

[0023] In this invention, the unstable air pressure and flow rate of the high-temperature mixed gas from the electrolytic cell when it is sent into the condensing space due to fluctuations in the electrolysis conditions can be avoided, thus enhancing the control stability of the condensing temperature and improving the condensing efficiency. Before introducing the mixed gas, the pressure regulating knob 304 is rotated to a set angle, causing the rotating rod 303 to rotate and drive the rotating semicircular plate 302 to rotate, changing the number of telescopic springs 204 that abut against the rotating semicircular plate 302. The more telescopic springs 204 that abut against the rotating semicircular plate 302, the larger the set automatic pre-pressure value. Then, the mixed gas generated by high-temperature water electrolysis for hydrogen production is continuously introduced into the upper space of the pre-pressure cylinder 100 through the air inlet pipe 101. The mixed gas does not directly enter the condensing chamber 504, but first compresses and pushes the baffle assembly 2. 00, causing the hammer 201 in the inner cavity of the pre-compression cylinder 100 to slide downward along the length of the pre-compression cylinder 100. At this time, the vent 103 is still blocked by the side of the hammer 201 and is not connected to the vent chamber 503. When the hammer 201 slides to the vent 103 at the lower part of the pre-compression cylinder 100, the vent chamber 503 begins to connect with the upper part of the inner cavity of the pre-compression cylinder 100. The mixed gas with a certain pre-compression is introduced into the vent chamber 503 of the separation cylinder 500. The mixed gas continues to flow inside the separation cylinder 500 and flows from the vent chamber 503 to the condensation chamber 504. The liquid nitrogen control pump 510 is started to introduce liquid nitrogen into the liquid nitrogen chamber 506 and cool the mixed gas in the condensation chamber 504. The gas first enters the closed space at the upper part of the pre-compression cylinder 100 and accumulates pressure. This pressure-holding process smooths out upstream flow fluctuations. Only when the pressure is sufficient to overcome the preset resistance of the pressure regulating spring 204 can the baffle assembly 200 be pushed down, and the vent 103 be opened. This ensures that the gas entering the separation system has a stable initial pressure, providing stable pressure and flow for the subsequent condensation process, enhancing the stability of condensation temperature control, and improving condensation efficiency.

[0024] Furthermore, six telescopic springs 204 are circumferentially fixedly connected to the side of the baffle 203 facing away from the crossbar 202, wherein three of the telescopic springs 204 are fixedly connected to the fixed semicircular plate 301 of the pressure regulating component 300 at the ends away from the baffle 203, and the outer edge of the fixed semicircular plate 301 is fixedly connected to the inner wall of the support cylinder 400.

[0025] Furthermore, the pressure regulating assembly 300 includes a rotating semicircular plate 302, the center of which is fixedly connected to one end of a rotating rod 303, the center of which is rotatably connected to one end of a fixed semicircular plate 301, and the other end of the rotating rod 303 extends out of the bottom surface of the support cylinder 400 and is fixedly connected to the center of the pressure regulating knob 304.

[0026] In this invention, while maintaining a continuous flow of mixed gas, it is possible to ensure that the mixed gas has sufficient residence time in the condensation space, allowing impurities to be fully condensed before being carried out, thus improving the purity of the separated hydrogen. Because during the condensation process of the mixed gas entering the condensation chamber 504, the gas pressure in the ventilation chamber 503, condensation chamber 504, and pre-compression cylinder 100 gradually decreases until the pressure on the top of the hammer 201 is less than the pressure on the bottom of the hammer by the crossbar 202. At this point, the hammer 201 slides upwards, causing the ventilation chamber 503 and condensation chamber 504 to become sealed spaces again, preventing further gas flow. This achieves automated batch processing in the hydrogen separation and purification process. During the gas inlet stage, once the gas pressure reaches the target, the baffle assembly 200 is pushed open, allowing the ventilation holes to... 103 is opened, and then the high-pressure mixed gas rushes into the condensation chamber 504. During the closed condensation stage, after the gas enters the venting chamber 503 and the condensation chamber 504, condensation causes the gas volume inside the chamber to shrink sharply and the pressure to drop rapidly. When the pressure inside the chamber drops below the rebound force of the telescopic spring 204, the baffle assembly 200 automatically moves upward and closes the vent. At this time, the condensation chamber 504 becomes a completely sealed reactor, and impurities have sufficient time to condense and separate from the gas by gravity. This avoids the problem of impurity gas escaping in continuous flow mode. The purified hydrogen is discharged through the outlet pipe 507 after the vent valve 508 is opened, and the pressure inside the chamber is further reduced. Subsequently, the upstream mixed gas accumulates pressure again in the pre-compression cylinder 100 and begins the next cycle.

[0027] Furthermore, the pressure regulating knob 304 is a hexagonal prism, and each of the six sides of the pressure regulating knob 304 has a through hole.

[0028] Furthermore, the interlayer between the cooling cylinder 505 and the outer cylinder 502 is a liquid nitrogen chamber 506, the height of which is lower than the height of the condensation chamber 504, and the liquid nitrogen chamber 506 is connected to the liquid nitrogen control pump 510.

[0029] In this invention, the height of the liquid nitrogen chamber 506 is lower than the height of the condensation chamber 504, so that the condensation process can occur in the condensation chamber 504 between the inner wall of the outer cylinder 502 and the outer wall of the inner cylinder 501. The condensed impurity liquid and impurity solid can be discharged from the hole at the bottom of the condensation chamber 504 that connects to the drain pipe 511.

[0030] Furthermore, the length of the vent 103 is less than the length of the hammer 201, and the sliding distance of the baffle 203 along the support cylinder 400 is greater than the length of the crossbar 202.

[0031] In this invention, the length of the vent hole 103 is less than the length of the hammer head 201, and the sliding distance of the baffle 203 along the support cylinder 400 is greater than the length of the crossbar 202, so as to ensure that the vent hole 103 can be connected to the vent chamber 503 after the hammer head 201 is pushed down.

[0032] Furthermore, the separating cylinder 500 includes a vent valve 508, and the top of the outer cylinder 502 is connected to the vent pipe 507 through the vent valve 508.

[0033] Furthermore, the separating cylinder 500 includes a cylinder cover 509, which is sealed to the top of the separating cylinder 500. The cylinder cover 509 has a through hole for the air inlet pipe 101 and the air outlet pipe 507 to pass through. The air inlet pipe 101 passes through the cylinder cover 509 and connects to the top of the pre-compression cylinder 100.

[0034] Furthermore, the bottom of the support cylinder 400 is circumferentially fixedly connected with three support legs 401.

[0035] A separation and purification method using the above-mentioned hydrogen separation and purification device for high-temperature water electrolysis hydrogen production includes the following steps: S101: Rotate the pressure adjustment knob 304 to the set angle. The rotating rod 303 rotates, causing the rotating semicircular plate 302 to rotate, thus changing the number of telescopic springs 204 that are against the rotating semicircular plate 302. S102: The mixed gas generated by high-temperature water electrolysis to produce hydrogen is continuously introduced into the upper space of the pre-compression cylinder 100 through the air inlet pipe 101. The mixed gas squeezes and pushes the hammer assembly 200, and the hammer head 201 in the pre-compression cylinder 100 slides downward along the length of the pre-compression cylinder 100. S103: When the hammer 201 slides to the vent 103 at the lower part of the pre-compression cylinder 100, the vent chamber 503 begins to connect with the upper part of the inner cavity of the pre-compression cylinder 100, and the mixed gas with a certain pre-compression is introduced into the vent chamber 503 of the separator 500. S104: The mixed gas continues to flow inside the separator 500 and flows from the ventilation chamber 503 to the condensation chamber 504. The liquid nitrogen control pump 510 is started to introduce liquid nitrogen into the liquid nitrogen chamber 506 and cool the mixed gas in the condensation chamber 504. S105: The amount of liquid nitrogen flowing into the liquid nitrogen chamber 506 is controlled by the temperature control and electrical control valve on the liquid nitrogen control pump 510, thereby accurately maintaining the temperature of the condensation chamber 504, so that various impurity gases in the hydrogen mixture condense while hydrogen does not condense. S106: During the condensation process, the air pressure in the ventilation chamber 503, the condensation chamber 504 and the pre-compression cylinder 100 will gradually decrease until the air pressure on the top of the hammer 201 is less than the pressure of the crossbar 202 on the bottom of the hammer. Then the hammer 201 slides upward, making the ventilation chamber 503 and the condensation chamber 504 become closed spaces again and no longer allow mixed gas to enter. S107: After the condensation of various impurity gases in the mixed gas is completed, the valve of the gas outlet pipe 507 at the top of the separator 500 is opened through the gas venting valve 508, and the purified hydrogen gas is discharged from the gas outlet pipe 507 and introduced into the hydrogen tank for storage.

[0036] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A hydrogen separation and purification device for high-temperature water electrolysis hydrogen production, characterized in that, The device includes a pre-compression cylinder (100), which is housed in the inner cavity of a separation cylinder (500). A hammer baffle assembly (200) is fitted inside the pre-compression cylinder (100). The hammer head (201) of the hammer baffle assembly (200) is attached to the inner wall of the pre-compression cylinder (100) and slidably connected to the inner cavity of the pre-compression cylinder (100). The two ends of the crossbar (202) are respectively fixedly connected to the hammer head (201) and the baffle (203). The top of the pre-compression cylinder (100) is connected to the air inlet pipe (101). The bottom of the pre-compression cylinder (100) is fixedly connected to the support cylinder (400). The baffle (203) is attached to the inner wall of the support cylinder (400) and slidably connected to the inner cavity of the support cylinder (400). The separation cylinder (500) includes an inner cylinder (501) and an outer cylinder (502). The outer wall of the inner cylinder (501) is fixedly connected to the bottom of the outer cylinder (502). The outer wall of the outer cylinder (502) is fixedly connected to a cooling cylinder (505). The height of the outer cylinder (502) is higher than the height of the inner cylinder (501). The space enclosed by the inner wall of the inner cylinder (501) and the inner wall of the outer cylinder (502) together with the outer wall of the pre-compression cylinder (100) is a ventilation chamber (503). The space enclosed by the outer wall of the inner cylinder (501) and the inner wall of the outer cylinder (502) is a condensation chamber (504). The top of the outer cylinder (502) is connected to the exhaust pipe (507). The pre-compression cylinder (100) has multiple vent holes (103) on the inner wall of the side near the support cylinder (400) that are connected to the ventilation chamber (503).

2. The hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to claim 1, characterized in that, The baffle (203) is circumferentially fixedly connected to six telescopic springs (204) on the side facing away from the crossbar (202). Three of the telescopic springs (204) are fixedly connected to the fixed semicircular plate (301) of the pressure regulating component (300) at the end away from the baffle (203). The outer edge of the fixed semicircular plate (301) is fixedly connected to the inner wall of the support cylinder (400).

3. The hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to claim 2, characterized in that, The pressure regulating assembly (300) includes a rotating semicircular plate (302), the center of which is fixedly connected to one end of a rotating rod (303), the center of which is rotatably connected to one end of a fixed semicircular plate (301), and the other end of the rotating rod (303) extends out of the bottom surface of the support cylinder (400) and is fixedly connected to the center of the pressure regulating knob (304).

4. The hydrogen separation and purification device for high-temperature water electrolysis hydrogen production according to claim 3, characterized in that, The pressure regulating knob (304) is a hexagonal prism, and each of the six sides of the pressure regulating knob (304) has a through hole.

5. The hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production according to claim 1, characterized in that, The interlayer between the cooling cylinder (505) and the outer cylinder (502) is a liquid nitrogen chamber (506). The height of the liquid nitrogen chamber (506) is lower than the height of the condensation chamber (504). The liquid nitrogen chamber (506) is connected to the liquid nitrogen control pump (510).

6. The hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production according to claim 1, characterized in that, The length of the vent (103) is less than the length of the hammer (201), and the sliding distance of the baffle (203) along the support cylinder (400) is greater than the length of the crossbar (202).

7. The hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production according to claim 1, characterized in that, The separator (500) includes a vent valve (508), and the top of the outer cylinder (502) is connected to the vent pipe (507) through the vent valve (508).

8. The hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production according to claim 1, characterized in that, The separating cylinder (500) includes a cylinder cover (509), which is sealed to the top of the separating cylinder (500). The cylinder cover (509) has a through hole for the air inlet pipe (101) and the air outlet pipe (507) to pass through. The air inlet pipe (101) passes through the cylinder cover (509) and connects to the top of the pre-compression cylinder (100).

9. The hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production according to claim 1, characterized in that, The bottom of the support cylinder (400) is fixedly connected with three legs (401).

10. A separation and purification method using the hydrogen separation and purification apparatus for high-temperature water electrolysis hydrogen production as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S101: Rotate the pressure adjustment knob (304) to the set angle, the rotating rod (303) rotates and drives the rotating semicircular plate (302) to rotate, changing the number of extension springs (204) that are against the rotating semicircular plate (302); S102: The mixed gas generated by high-temperature water electrolysis to produce hydrogen is continuously introduced into the upper space of the pre-compression cylinder (100) through the air inlet pipe (101). The mixed gas squeezes and pushes the hammer assembly (200). The hammer head (201) in the pre-compression cylinder (100) slides downward along the length of the pre-compression cylinder (100). S103: When the hammer (201) slides to the vent (103) at the bottom of the pre-compression cylinder (100), the vent chamber (503) begins to connect with the upper part of the inner cavity of the pre-compression cylinder (100), and the mixed gas with a certain pre-compression is introduced into the vent chamber (503) of the separator (500); S104: The mixed gas continues to flow inside the separator (500) and flows from the ventilation chamber (503) to the condensation chamber (504). The liquid nitrogen control pump (510) is started to introduce liquid nitrogen into the liquid nitrogen chamber (506) and cool the mixed gas in the condensation chamber (504). S105: The amount of liquid nitrogen flowing into the liquid nitrogen chamber (506) is controlled by the temperature control and electrical control valve on the liquid nitrogen control pump (510), thereby accurately maintaining the temperature of the condensation chamber (504) so ​​that various impurity gases in the hydrogen mixture condense while hydrogen does not condense. S106: During the condensation process, the gas pressure in the ventilation chamber (503), condensation chamber (504) and pre-compression cylinder (100) will gradually decrease until the pressure of the gas pressure on the top of the hammer (201) is less than the pressure of the crossbar (202) on the bottom of the hammer. Then the hammer (201) slides upward, making the ventilation chamber (503) and condensation chamber (504) become closed spaces again and no longer allow mixed gas to enter. S107: After the condensation of various impurity gases in the mixed gas is completed, the valve of the gas outlet pipe (507) at the top of the separator (500) is opened through the gas inlet valve (508), and the purified hydrogen gas is discharged from the gas outlet pipe (507) and introduced into the hydrogen tank for storage.

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