A flow varying purifying device for a hydrogen gas purifying adsorption tower

Abstract

The application discloses a variable-flow type purification device of a hydrogen purification adsorption tower and belongs to the technical field of hydrogen purification. The variable-flow type purification device of the hydrogen purification adsorption tower comprises a tower body, vacuum extraction pipes and gas inlet pipes are connected to the lower outer side of the tower body, an exhaust pipe is connected to the top of the tower body, first and second positioning screens are fixedly arranged on the inner side of the tower body, a fixing seat is fixedly installed on the upper inner side of the tower body, an elastic lifting connection is formed between the upper part of the fixing seat and a movable seat, a sealing plate is also fixedly installed on the upper inner side of the tower body, a rubber cylinder body for adjusting air pressure is fixedly connected between the movable seat and the sealing plate, and a flushing pipe is connected to the outer side of the upper part of the tower body. The variable-flow type purification device of the hydrogen purification adsorption tower can realize real-time regulation and control of the gas flow rate according to the purity of hydrogen purification, ensures the purification efficiency and the purity, and can realize efficient desorption in a combined manner, so that effective adsorption and purification of the adsorption tower are ensured.

Description

Technical Field

[0001] This invention relates to the field of hydrogen purification technology, specifically to a variable flow purification device for a hydrogen purification adsorption tower. Background Technology

[0002] Hydrogen, as a clean and efficient secondary energy source, plays an irreplaceable and important role in fields such as chemical synthesis, fuel cells, and aerospace. In order to improve the purity of hydrogen production, adsorption towers are needed to adsorb and remove impurities in hydrogen.

[0003] The prior art (Chinese patent publication number: CN119075585A, publication date: 2024-12-06) discloses a novel hydrogen recovery adsorption tower for absorbing hydrogen impurities, including a recovery adsorption tower body, a molecular sieve storage chamber, a partition, a molecular sieve inlet, a molecular sieve outlet, a water storage chamber, an air inlet, an air outlet, a cleaning brush, and a water spray distribution head; a partition is fixedly connected to the lower end of the inner side of the recovery adsorption tower body; the upper end of the partition is set as a molecular sieve storage chamber for storing molecular sieve raw materials; a molecular sieve inlet is installed at the top of the recovery adsorption tower body; the air inlet and outlet of the adsorption tower are designed on the side, and the inlet and outlet of the molecular sieve are designed on the top and lower side of the tank body. The overall structure realizes that the pipeline installation and molecular sieve replacement do not affect each other. By using a perforated plate to separate the molecular sieve, the molecular sieve and the adsorbed water are cleverly isolated. After a period of accumulation, the water can be discharged through the bottom ball valve;

[0004] The prior art (Chinese patent announcement number: CN222855014U, publication date: 2025-05-13) discloses a hydrogen adsorption tower regeneration device, including hydrogen adsorption tower A and hydrogen adsorption tower B. The hydrogen inlets of hydrogen adsorption tower A and hydrogen adsorption tower B are respectively connected to hydrogen inlet pipeline one and hydrogen inlet pipeline two. Inlet valve one and inlet valve two are respectively installed on hydrogen inlet pipeline one and hydrogen inlet pipeline two. When regenerating the hydrogen adsorption tower, the hydrogen adsorption tower is first depressurized, and then water vapor is used to desorb the organic phase in the hydrogen adsorption tower. At the same time, the desorbed regenerated material is recycled and reused through a material recovery unit. Then, the hydrogen adsorption tower is purged with hot nitrogen and cold nitrogen in sequence. Finally, qualified hydrogen is used to balance the hydrogen inlet of the hydrogen adsorption tower, thus completing the regeneration of the hydrogen adsorption tower and ensuring the stable operation of hydrogen adsorption.

[0005] Existing hydrogen purification adsorption towers only use pressure reduction or uniform backflushing during desorption. However, due to the tight bonding of the molecular sieves, simple pressure reduction and backflushing cannot effectively promote the desorption and reduction of the molecular sieves, thereby reducing the efficiency of equipment desorption and subsequent re-adsorption, which has certain defects in use. Summary of the Invention

[0006] The purpose of this invention is to provide a variable flow purification device for a hydrogen purification adsorption tower, in order to solve the problem mentioned in the background art that the purification devices of hydrogen purification adsorption towers on the market only use pressure reduction or uniform backflushing during desorption. However, due to the tight bonding of the molecular sieve, simple pressure reduction and backflushing cannot effectively promote the desorption and reduction of the molecular sieve, thereby reducing the efficiency of equipment desorption and subsequent re-adsorption.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a variable flow purification device for a hydrogen purification adsorption tower, comprising a tower body, a vacuum pipe and an inlet pipe connected to the lower outer side of the tower body, and an exhaust pipe connected to the top of the tower body; a first positioning screen and a second positioning screen fixedly installed on the inner side of the tower body, with molecular sieves filling the space between the first and second positioning screens; a fixed seat fixedly installed on the upper inner side of the tower body, with a movable seat elastically and vertically connected above the fixed seat; a sealing plate fixedly installed on the upper inner side of the tower body, with a pressure-regulating rubber cylinder fixedly connected between the movable seat and the sealing plate; a flushing pipe connected to the upper outer side of the tower body, with a diverter pipe connected between the tower body and the flushing pipe; a fixed pipe connected to the tower body, with a pulse flushing mechanism rotatably installed at the outlet end of the fixed pipe; and the pulse flushing mechanism is rotated and adjusted by a transmission component during the lifting and lowering of the movable seat.

[0008] Preferably, the inlet pipe and the outlet pipe are connected to flow regulating valves, and a purity monitor for detecting the purity of hydrogen is fixedly installed on the top of the tower.

[0009] Preferably, the movable seat, sealing plate, and rubber sleeve form a sealed structure with the tower body, and the rubber sleeve deforms and shrinks under negative pressure when the vacuum tube extracts gas from inside the tower body.

[0010] Preferably, during the deformation of the rubber cylinder, the movable seat is pulled down. A first spring is fixedly connected between the movable seat and the fixed seat. The movable seat and the tower body are axially slidably connected by a sliding key. The upper part of the movable seat is cylindrical and is sealed against the inner wall of the tower body. At the same time, the movable seat blocks the flushing pipe in the initial position. When the movable seat moves down to the lowest position, the flushing pipe is connected to the inside of the tower body to realize air intake.

[0011] Preferably, both the diversion pipe and the fixed pipe are equipped with a one-way valve structure. When the rubber cylinder is retracted, the diversion pipe introduces hydrogen into the tower body and the rubber cylinder. When the rubber cylinder is restored, the hydrogen between the tower body and the rubber cylinder is discharged through the fixed pipe.

[0012] Preferably, the pulse flushing mechanism includes a damped rotatable movable tube mounted on the outlet end of the fixed tube, and a fixed purge seat is fixedly connected to the lower end of the movable tube, with the outlet end of the fixed purge seat facing the molecular sieve.

[0013] Preferably, two push rods are symmetrically and elastically rotatably arranged on the outer side of the movable tube. The push rods are arranged in a V-shape, and both ends of the push rods are provided with a ball structure. At the same time, the ball at the upper end of the push rod is attached to the inner wall of the rubber tube. When the rubber tube contracts, it pushes the push rod to rotate elastically. The part of the rubber tube that is attached to the push rod is thinner than other parts, ensuring that the thinner part of the rubber tube contracts first to push the push rod to rotate.

[0014] Preferably, the fixed purge seat is slidably and telescopically connected to a movable purge seat at both ends, and a push plate is fixedly provided on the upper surface of the movable purge seat. The upper part of the push plate is inclined. A second spring is fixedly connected between the push plate and the fixed purge seat. During the rotation of the push rod, the ball at its lower end adheres to and pushes the push plate, driving the fixed purge seat and the movable purge seat to elastically extend and retract. The fixed purge seat and the movable purge seat are provided with connected purge holes at their lower ends. During the retraction of the fixed purge seat and the movable purge seat, the purge holes on the two gradually partially overlap to reduce the purge hole diameter.

[0015] Preferably, a striking element is fixedly installed at the lower end of the movable purging seat, and vibrating tubes are evenly arranged through the second positioning screen. Each vibrating tube is connected by a vibration guide seat, which is arranged in a ring structure. During the movement of the movable purging seat, the striking element strikes the vibration guide seat, driving the vibrating tubes to vibrate.

[0016] Preferably, the transmission assembly includes a lifting sleeve fixedly installed on the movable seat, and a ball bearing is embedded in the inner wall of the lifting sleeve. The movable sleeve is rotatably installed on the upper outer side of the movable tube through a one-way bearing, and a spiral guide groove is opened on the outer wall of the movable sleeve. The lifting sleeve is slidably sleeved on the outer side of the movable sleeve. During the lifting and sliding process of the lifting sleeve, the ball bearing slides back and forth along the guide groove, driving the movable sleeve to rotate back and forth, and at the same time driving the movable tube to rotate and adjust.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the variable flow purification device of the hydrogen purification adsorption tower can adjust the gas flow rate in real time according to the purity of hydrogen purification, ensuring both purification efficiency and purity, and can use multiple methods to achieve efficient desorption, ensuring the effective adsorption and purification of the adsorption tower, as detailed below.

[0018] 1. Equipped with a movable seat and a rubber sleeve, when desorption is required, the vacuum tube is controlled to extract gas from the inside of the tower, causing the internal gas pressure to decrease in a gradient manner. As the gas pressure gradually decreases, the rubber sleeve will contract under negative pressure, causing the upper end of the rubber sleeve to pull the movable seat downward. When the movable seat releases the blockage of the flushing pipe, clean hydrogen gas in the flushing pipe enters the inside of the tower, realizing backwashing of the molecular sieve material. When hydrogen gas enters, the pressure inside the tower increases, causing the movable seat to reset under the action of the first spring, thereby re-blocking the flushing pipe, thus realizing intermittent flushing.

[0019] 2. It is equipped with a diversion pipe and a fixed pipe. As the rubber cylinder shrinks and recovers, the diversion pipe can draw hydrogen from the inside of the flushing pipe and deliver it to the movable pipe, fixed purge seat, and movable purge seat through the fixed pipe to achieve pressurized flushing of the local molecular sieve.

[0020] Furthermore, a push rod is also provided. As the rubber sleeve contracts, it pushes the push rod to rotate elastically, causing the lower end of the push rod to push the movable purge seat away from the fixed purge seat. When the rubber sleeve returns to its original position, the fixed purge seat and the movable purge seat will contract and reset, causing the purge orifice diameter to gradually decrease. This further ensures the gas pressure during local flushing, improves the flushing effect, and can effectively improve the desorption effect.

[0021] Furthermore, a lifting sleeve and a movable sleeve are provided. As the movable seat reciprocates, it can drive the lifting sleeve to reciprocate. At this time, the balls on the inner side of the lifting sleeve will roll along the guide groove on the outer side of the movable sleeve, thereby driving the movable sleeve to rotate back and forth. Since the movable sleeve and the movable tube are connected by a one-way bearing, the movable sleeve can drive the movable tube to rotate in one direction for adjustment. This allows the fixed purging seat and the movable purging seat to pressurize and flush the local molecular sieves at different locations.

[0022] 3. It is equipped with a striking element, a vibrating tube, and a vibration guide seat. As the movable purge seat elastically extends and retracts, the striking element on the movable purge seat can strike the vibration guide seat, which in turn causes the vibrating tube to drive the molecular sieve to vibrate slightly, thereby promoting further desorption of the molecular sieve and ensuring the subsequent adsorption and purification effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the main cross-sectional structure of the tower body of the present invention;

[0025] Figure 3 This is a schematic cross-sectional view of the tower body of the present invention;

[0026] Figure 4This is a schematic diagram of the installation structure of the movable seat and the rubber sleeve of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is a schematic diagram of the connection structure of the fixed tube, movable tube, and fixed purging seat of the present invention;

[0029] Figure 7 This is a schematic diagram of the connection structure between the fixed purge base and the movable purge base of the present invention;

[0030] Figure 8 For the present invention Figure 4 Enlarged structural diagram at point B;

[0031] Figure 9 This is a cross-sectional view of the fixed purge seat and the movable purge seat of the present invention;

[0032] Figure 10 This is a schematic diagram of the installation structure of the vibration tube and the vibration guide seat of the present invention.

[0033] In the diagram: 1. Tower body; 101. Vacuum tube; 2. Inlet pipe; 3. Exhaust pipe; 4. First positioning screen; 5. Second positioning screen; 6. Purity monitor; 7. Fixed seat; 8. First spring; 9. Movable seat; 10. Sealing plate; 11. Rubber cylinder; 12. Flushing pipe; 13. Diverter pipe; 14. Fixed pipe; 15. Movable pipe; 16. Fixed purging seat; 17. Movable purging seat; 18. Push plate; 19. Second spring; 20. Push rod; 21. Striking component; 22. Vibration tube; 23. Vibration guide seat; 24. Lifting sleeve; 25. Ball bearing; 26. Movable sleeve; 27. Guide groove. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: In existing hydrogen purification adsorption towers, the gas delivery flow rate remains constant during operation, making it impossible to effectively adsorb impurities after the subsequent molecular sieve adsorption capacity decreases. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-2As shown; a flow-changing purification device for a hydrogen purification adsorption tower includes a tower body 1. A vacuum pipe 101 and an inlet pipe 2 are connected to the lower outer side of the tower body 1, and an exhaust pipe 3 is connected to the top of the tower body 1. Flow regulating valves are connected to the inlet pipe 2 and the exhaust pipe 3. A purity monitor 6 for detecting the purity of hydrogen is fixedly installed on the top of the tower body 1. A first positioning sieve 4 and a second positioning sieve 5 are fixedly arranged on the inner side of the tower body 1, and molecular sieves are filled between the first positioning sieve 4 and the second positioning sieve 5.

[0036] Raw material gas is supplied to the lower part of the tower body 1 through the inlet pipe 2. The gas is purified by adsorption through the molecular sieve between the first positioning sieve 4 and the second positioning sieve 5. The purified hydrogen is discharged from the tower through the exhaust pipe 3. At the same time, the purity monitor 6 can monitor the purity of the discharged hydrogen in real time. As the adsorption time of the molecular sieve increases, its adsorption effect gradually decreases, so the purity monitor 6 can detect the change in hydrogen purity. Then, the controller controls the flow regulating valve connected to the inlet pipe 2 to reduce the gas input flow rate, so as to prolong the time of gas passing through the molecular sieve. By changing the flow input, the hydrogen purification effect is ensured.

[0037] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Existing hydrogen purification adsorption towers use a single rinsing method during desorption, which cannot ensure sufficient desorption of the molecular sieve. To further solve this technical problem, this example discloses the following technical content: Figures 2-8As shown; a fixed seat 7 is fixedly installed on the upper inner side of the tower body 1, and a movable seat 9 is elastically lifted and connected above the fixed seat 7. A sealing plate 10 is also fixedly installed on the upper inner side of the tower body 1, and a pressure-regulating rubber cylinder 11 is fixedly connected between the movable seat 9 and the sealing plate 10. The rubber cylinder 11 is made of high-strength elastic silicone rubber or fluororubber commonly used in chemical equipment. A flushing pipe 12 is connected to the upper outer side of the tower body 1, and a diversion pipe 13 is connected between the tower body 1 and the flushing pipe 12. A fixed pipe 14 is also connected to the tower body 1, and a pulse flushing mechanism is rotatably installed at the outlet end of the fixed pipe 14. During the lifting and lowering process, the movable seat 9 drives the pulse flushing mechanism to rotate and adjust through a transmission component. The movable seat 9, the sealing plate 10, and the rubber cylinder 11 are connected to the tower body. A sealed structure is formed between the two parts. When the vacuum tube 101 extracts gas from the inside of the tower body 1, the rubber sleeve 11 deforms and retracts under negative pressure. During the deformation of the rubber sleeve 11, the movable seat 9 is pulled down. A first spring 8 is fixedly connected between the movable seat 9 and the fixed seat 7. The movable seat 9 and the tower body 1 are axially slidably connected by a sliding key. The upper part of the movable seat 9 is cylindrical and is sealed against the inner wall of the tower body 1. At the same time, the movable seat 9 blocks the flushing pipe 12 in the initial position. When the movable seat 9 moves down to the lowest position, the flushing pipe 12 is connected to the inside of the tower body 1 to realize air intake. Both the diversion pipe 13 and the fixed pipe 14 are equipped with one-way valve structures. When the rubber sleeve 11 retracts, the diversion pipe 13 flows into the tower body 1 and the rubber sleeve. Hydrogen gas is introduced into the cylinder 11. When the cylinder 11 is restored, the hydrogen gas between the tower body 1 and the cylinder 11 is discharged through the fixed pipe 14. The pulse flushing mechanism includes a movable pipe 15 that is damped and rotatably installed at the outlet end of the fixed pipe 14. The lower end of the movable pipe 15 is fixedly connected to a fixed purge seat 16. The movable pipe 15 is sealed and connected to both the fixed pipe 14 and the fixed purge seat 16, ensuring that hydrogen gas can enter the fixed purge seat 16 through the fixed pipe 14 and the movable pipe 15. The outlet end of the fixed purge seat 16 faces the molecular sieve. Two push rods 20 are symmetrically and elastically rotatably arranged on the outside of the movable pipe 15. The push rods 20 are arranged in a V-shape, and both ends of the push rods 20 are provided with spherical structures. At the same time, the spherical structures at the upper end of the push rods 20 are attached to the rubber. The inner wall of the cylinder 11 is thinner than other parts when the cylinder 11 contracts, which pushes the push rod 20 to rotate elastically. The thinner part of the cylinder 11 that is in contact with the push rod 20 is thinner than other parts, ensuring that the thinner part of the cylinder 11 contracts first to push the push rod 20 to rotate. The two ends of the fixed purge seat 16 are slidably connected to the movable purge seat 17, and the upper surface of the movable purge seat 17 is fixedly provided with a push plate 18, and the upper part of the push plate 18 is inclined. A second spring 19 is fixedly connected between the push plate 18 and the fixed purge seat 16. At the same time, during the rotation of the push rod 20, the ball at its lower end contacts and pushes the push plate 18, driving the fixed purge seat 16 and the movable purge seat 17 to elastically extend and retract. The lower ends of the fixed purge seat 16 and the movable purge seat 17 are provided with connected purge holes.Furthermore, during the retraction of the fixed purge seat 16 and the movable purge seat 17, the purge holes on both gradually overlap to reduce the purge hole diameter. The transmission assembly includes a lifting sleeve 24 fixedly mounted on the movable seat 9, with ball bearings 25 embedded in the inner wall of the lifting sleeve 24. A movable sleeve 26 is rotatably mounted on the upper outer side of the movable tube 15 via a one-way bearing, and a spiral guide groove 27 is formed on the outer wall of the movable sleeve 26. The lifting sleeve 24 is slidably sleeved on the outer side of the movable sleeve 26. During the lifting and sliding process of the lifting sleeve 24, the ball bearings 25 slide back and forth along the guide groove 27, driving the movable sleeve 26 to rotate back and forth, and simultaneously driving the movable tube 15 to rotate and adjust.

[0038] When desorption is required, the flow regulating valves on the inlet pipe 2 and the outlet pipe 3 are closed, and the vacuum equipment is controlled to extract the gas inside the tower body 1 through the vacuum pipe 101, causing the gas pressure inside the tower body 1 to decrease in a gradient manner. As the gas pressure gradually decreases, the molecular sieve will gradually desorb. The external atmospheric pressure of the rubber cylinder 11 is greater than its internal gas pressure, and the resulting pressure difference will act on both the radial and axial sides of the rubber cylinder 11. Under the action of negative pressure, the rubber cylinder 11 will undergo radial contraction, that is, the rubber cylinder 11 will deform and stretch inward. Since the movable seat 9 and the tower body 1 are axially slidably connected by a sliding key, the movable seat 9... Both the movable seat 9 and the tower body 1 can only be adjusted vertically. The pressure difference is transmitted to both ends through the deformation of the rubber sleeve 11. Since one end is fixed and the other is movable, the axial component of the pressure difference cannot be constrained and canceled out, thus pulling the movable seat 9 downward to achieve axial contraction. When the movable seat 9 releases the blockage of the flushing pipe 12, the clean hydrogen gas in the flushing pipe 12 enters the inside of the tower body 1 to achieve backwashing of the molecular sieve material. When the hydrogen gas enters the tower body 1, the pressure inside the tower increases. At this time, the rubber sleeve 11 will automatically recover, causing the movable seat 9 to reset under the action of the first spring 8, thereby... The flushing pipe 12 is resealed to achieve intermittent flushing. As the rubber sleeve 11 contracts and recovers, the diversion pipe 13 can extract the hydrogen gas transported inside the flushing pipe 12 and transport it to the movable pipe 15 through the fixed pipe 14. The fixed purge seat 16 and the movable purge seat 17 achieve pressurized flushing of the local molecular sieve. As the gas pressure changes, because the part of the rubber sleeve 11 that is in contact with the push rod 20 is thinner than other parts, the part of the rubber sleeve 11 that is in contact with the push rod 20 contracts more significantly. At the same time, it pushes the push rod 20 to rotate elastically, causing the push rod 20 to move downwards. The movable purge seat 17 is pushed away from the fixed purge seat 16. Due to the limited elastic tension at the thinner part of the rubber sleeve 11, it will continue to transmit the tension to the movable seat 9 when it can no longer deform. When the rubber sleeve 11 returns to its original position (at this time, the movable tube 15 delivers gas), the fixed purge seat 16 and the movable purge seat 17 will retract and reset. At this time, the purge holes on the fixed purge seat 16 and the movable purge seat 17 gradually overlap, so that the purge hole diameter gradually decreases, thereby further ensuring the gas pressure during local flushing, improving the flushing effect, and effectively improving the desorption effect.

[0039] As the movable seat 9 reciprocates, it drives the lifting sleeve 24 to reciprocate on the outside of the movable sleeve 26. At this time, the balls 25 on the inner side of the lifting sleeve 24 roll along the spiral guide groove 27 on the outer side of the movable sleeve 26, thereby driving the movable sleeve 26 to rotate reciprocally. Since the movable sleeve 26 and the movable tube 15 are rotatably connected by a one-way bearing, the movable sleeve 26 can drive the movable tube 15 to rotate in one direction. That is, when the one-way bearing cannot rotate, the movable sleeve 26 will drive the movable tube 15 to rotate synchronously. When the movable sleeve 26 rotates in the opposite direction, the one-way bearing can rotate, allowing the movable tube 15 and the movable sleeve 26 to rotate in one direction. The fixed tube 14 and the movable tube 15 are connected by a damped rotation, which keeps the movable tube 15 in position under the action of damping. This allows the fixed purge seat 16 and the movable purge seat 17 to pressurize and flush the local molecular sieves at different positions. At the same time, with the repeated reciprocating rotation of the movable sleeve 26, the movable tube 15 can be driven to rotate in one direction multiple times, so that the fixed purge seat 16 and the movable purge seat 17 can pass over the molecular sieves at different positions. After the fixed purge seat 16 and the movable purge seat 17 have rotated one revolution, the flushing of all molecular sieves is completed. Therefore, it is not affected by the lifting stroke of the lifting sleeve 24.

[0040] Example 3: The technical content disclosed in this example is a further improvement based on Example 2 above. Existing hydrogen purification adsorption tower purification devices only rely on airflow to promote molecular sieve desorption during desorption. However, some molecular sieves are tightly bonded, preventing the airflow from fully reaching all gaps in the molecular sieves, thus failing to ensure desorption efficiency. To further solve this technical problem, this example discloses the following technical content: Figures 9-10 As shown, a striking element 21 is fixedly installed at the lower end of the movable purge seat 17, and a vibrating tube 22 is evenly arranged through the second positioning screen 5. Each vibrating tube 22 is connected through a vibration guide seat 23. The vibration guide seat 23 is arranged in a ring structure. During the movement of the movable purge seat 17, the striking element 21 strikes the vibration guide seat 23, driving the vibrating tube 22 to vibrate.

[0041] With the elastic extension and retraction adjustment of the movable purge seat 17, the striking element 21 on the movable purge seat 17 can strike the vibration guide seat 23, thereby causing the vibration tube 22 to vibrate. This causes the vibration tube 22 to drive the molecular sieve to vibrate slightly, thereby promoting further desorption of the molecular sieve and ensuring the subsequent adsorption and purification effect.

[0042] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flow-changing purification device for a hydrogen purification adsorption tower, comprising a tower body (1), wherein a vacuum pipe (101) and an inlet pipe (2) are respectively connected to the lower outer side of the tower body (1), and an exhaust pipe (3) is connected to the top of the tower body (1), and a first positioning screen (4) and a second positioning screen (5) are fixedly arranged on the inner side of the tower body (1), while a molecular sieve is filled between the first positioning screen (4) and the second positioning screen (5); Its features are, A fixed seat (7) is fixedly installed on the upper inner side of the tower body (1), and a movable seat (9) is elastically lifted and connected above the fixed seat (7). A sealing plate (10) is also fixedly installed on the upper inner side of the tower body (1), and a rubber cylinder (11) for adjusting air pressure is fixedly connected between the movable seat (9) and the sealing plate (10). A flushing pipe (12) is connected to the upper outer side of the tower body (1), and a diversion pipe (13) is connected between the tower body (1) and the flushing pipe (12). A fixed pipe (14) is also connected to the tower body (1), and a pulse flushing mechanism is rotatably installed at the air outlet end of the fixed pipe (14). The pulse flushing mechanism is rotated and adjusted by the transmission component during the lifting and lowering of the movable seat (9). The movable seat (9), sealing plate (10) and rubber sleeve (11) form a sealed structure with the tower body (1), and when the vacuum tube (101) extracts the gas inside the tower body (1), the rubber sleeve (11) deforms and shrinks under negative pressure. During the deformation of the rubber cylinder (11), the movable seat (9) is pulled down. A first spring (8) is fixedly connected between the movable seat (9) and the fixed seat (7). The movable seat (9) and the tower body (1) are axially slidably connected by a sliding key. The upper part of the movable seat (9) is cylindrical. The upper part of the movable seat (9) is sealed against the inner wall of the tower body (1). At the same time, the movable seat (9) blocks the flushing pipe (12) when it is in the initial position. When the movable seat (9) moves down to the lowest position, the flushing pipe (12) and the interior of the tower body (1) are connected to achieve air intake. Both the diversion pipe (13) and the fixed pipe (14) are equipped with a one-way valve structure. When the rubber cylinder (11) is retracted, the diversion pipe (13) inputs hydrogen into the tower body (1) and the rubber cylinder (11). When the rubber cylinder (11) is restored, the hydrogen between the tower body (1) and the rubber cylinder (11) is discharged through the fixed pipe (14).

2. The variable flow purification device for a hydrogen purification adsorption tower according to claim 1, characterized in that: The inlet pipe (2) and the outlet pipe (3) are connected to flow regulating valves, and a purity monitor (6) for detecting the purity of hydrogen is fixedly installed on the top of the tower body (1).

3. The variable flow purification device for a hydrogen purification adsorption tower according to claim 1, characterized in that: The pulse flushing mechanism includes a movable tube (15) that is damped and rotatably installed at the outlet end of the fixed tube (14), and a fixed purge seat (16) is fixedly connected to the lower end of the movable tube (15), and the outlet end of the fixed purge seat (16) faces the molecular sieve.

4. The variable flow purification device for a hydrogen purification adsorption tower according to claim 3, characterized in that: Two push rods (20) are symmetrically and elastically rotated on the outer side of the active tube (15). The push rods (20) are arranged in a V-shape, and both ends of the push rods (20) are provided with spherical structures. At the same time, the spherical structure at the upper end of the push rod (20) is attached to the inner wall of the rubber sleeve (11). When the rubber sleeve (11) contracts, it pushes the push rods (20) to rotate elastically. The part of the rubber sleeve (11) that is attached to the push rods (20) is thinner than other parts, ensuring that the thinned part of the rubber sleeve (11) contracts first to push the push rods (20) to rotate.

5. The variable flow purification device for a hydrogen purification adsorption tower according to claim 4, characterized in that: The fixed purge seat (16) is slidably telescopically connected to the two ends of the movable purge seat (17), and a push plate (18) is fixedly provided on the upper surface of the movable purge seat (17). The upper part of the push plate (18) is inclined. A second spring (19) is fixedly connected between the push plate (18) and the fixed purge seat (16). At the same time, during the rotation of the push rod (20), the ball at its lower end adheres to and pushes the push plate (18), driving the fixed purge seat (16) and the movable purge seat (17) to elastically telescopically adjust. The fixed purge seat (16) and the movable purge seat (17) have interconnected purge holes at their lower ends. During the contraction of the fixed purge seat (16) and the movable purge seat (17), the purge holes on the two gradually partially overlap to reduce the purge hole diameter.

6. The variable flow purification device for a hydrogen purification adsorption tower according to claim 5, characterized in that: The lower end of the movable purge seat (17) is fixedly installed with a striking element (21), and a vibrating tube (22) is evenly arranged through the second positioning screen (5). Each vibrating tube (22) is connected through a guide seat (23), which is arranged in a ring structure. During the movement of the movable purge seat (17), the striking element (21) strikes the guide seat (23), driving the vibrating tube (22) to vibrate.

7. The variable flow purification device for a hydrogen purification adsorption tower according to claim 3, characterized in that: The transmission assembly includes a lifting sleeve (24) fixedly installed on the movable seat (9), and a ball bearing (25) is embedded in the inner wall of the lifting sleeve (24). The upper outer side of the movable tube (15) is rotatably installed with a movable sleeve (26) through a one-way bearing. The outer wall of the movable sleeve (26) is provided with a spiral guide groove (27). The lifting sleeve (24) is slidably sleeved on the outer side of the movable sleeve (26). During the lifting and sliding process of the lifting sleeve (24), the ball bearing (25) slides back and forth along the guide groove (27), driving the movable sleeve (26) to rotate back and forth, and at the same time driving the movable tube (15) to rotate and adjust.

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