Temperature swing adsorption industrial hydrogen purification device

Abstract

The invention discloses a temperature swing adsorption industrial hydrogen purification device, and relates to the technical field of hydrogen purification, the temperature swing adsorption industrial hydrogen purification device comprises an adsorption tower, and a central pipe coaxially arranged in the adsorption tower; the movable adsorption bed layer is positioned between the central pipe and the inner wall of the adsorption tower and comprises a fixed frame, the fixed frame is provided with an upper ring frame and a lower ring frame which are opposite to each other, and the movable adsorption bed layer further comprises an upper adsorption plate and a lower adsorption plate which are rotationally arranged on the upper ring frame and the lower ring frame respectively. According to the temperature swing adsorption industrial hydrogen purification device, the movable adsorption bed layer is arranged, so that feed gas has two flowing paths, the feed gas is subjected to impurity removal through the upper surfaces of the upper adsorption plate and the lower adsorption plate under the initial flowing path, then is switched to the other flowing path, and is subjected to impurity removal through the lower surfaces of the upper adsorption plate and the lower adsorption plate; therefore, the problem of saturation caused by the fact that a single-face adsorbent is blocked by impurities is avoided, and meanwhile adsorbent particles can be driven to flow and be evenly dispersed through swinging.

Description

Technical Field

[0001] This invention relates to the field of hydrogen purification technology, and more specifically to a temperature-switching adsorption industrial hydrogen purification device. Background Technology

[0002] A temperature-switching adsorption (TSA) industrial hydrogen purification device is a highly efficient gas separation system designed based on the TSA principle. It uses high-efficiency activated carbon as the core adsorbent, achieving selective adsorption and desorption of impurities in hydrogen through periodic temperature changes. The device adsorbs impurities during a low-temperature, high-pressure phase and regenerates the adsorbent during a high-temperature, low-pressure phase. The high-efficiency activated carbon, with its high specific surface area and microporous structure, significantly enhances adsorption capacity and cycle stability. It is suitable for producing high-purity hydrogen (above 99.9%) in refining, chemical, and other fields, and also offers advantages such as low energy consumption and long lifespan.

[0003] Based on publication number CN119367987A, published on 2025-01-28, a hydrogen preparation and purification device is disclosed. This device utilizes a deoxygenator, a pre-drying tower, a first drying tower, a second drying tower, a condenser, a flow regulator, a regenerated gas heater, a regenerated gas condenser, and several control valves to achieve both heating and condensation adsorption of hydrogen, effectively reducing hydrogen consumption and ensuring good hydrogen purification results. Furthermore, since the hydrogen obtained through water electrolysis is relatively pure with low impurity content, the process of removing impurity oxygen using hydrogen under palladium catalyst catalysis, followed by temperature-switching adsorption dehydration using a composite bed of activated alumina and molecular sieves, is quite reasonable. This process is simple, energy-efficient, and easily integrated into skid-mounted systems for small and medium-sized purification devices, saving space and investment, and is widely applicable to various industrial fields.

[0004] However, in the prior art, including the aforementioned patent, hydrogen often flows through the molecular sieve composite bed in a unidirectional (axial or radial) manner. Impurities will first fill the side of the molecular sieve that is in contact with hydrogen. Once the gaps on the contact surface are filled with impurities, it will be difficult for the impurities to pass through the contact surface and reach the interior of the molecular sieve. In other words, the molecular sieve is only saturated on the contact surface, but other parts of the molecular sieve do not have enough contact with hydrogen, thus reducing the overall utilization efficiency of the molecular sieve. Summary of the Invention

[0005] The purpose of this invention is to provide a temperature-switching adsorption industrial hydrogen purification device to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temperature-switching adsorption industrial hydrogen purification device, comprising an adsorption tower and a central tube coaxially disposed within the adsorption tower; The movable adsorption bed located between the central tube and the inner wall of the adsorption tower includes a fixed frame, and the fixed frame has an upper ring frame and a lower ring frame opposite to each other, and also includes an upper adsorption plate and a lower adsorption plate respectively rotatably disposed on the upper ring frame and the lower ring frame; An upper toothed ring rotatably mounted on an upper ring frame and a lower toothed ring rotatably mounted on a lower ring frame; The first bevel gear is fixedly provided at the first end of the upper adsorption plate, and an upper bevel gear that meshes with the first bevel gear is rotatably provided on the upper ring frame. An upper gear that meshes with the upper gear ring is fixedly provided on the upper bevel gear. A second bevel gear is fixedly installed at the first end of the lower adsorption plate, and a lower bevel gear that meshes with the second bevel gear is rotatably installed on the lower ring frame. A lower gear that meshes with the lower gear ring is fixedly installed on the lower bevel gear. It also includes a drive mechanism for driving the upper and lower gear rings to rotate simultaneously; The upper and lower adsorption plates are driven to rotate to switch between two states: cross and parallel. The movable tube, which is slidably set at the port of the central tube, has two stations during its movement: one coupled to the central tube and the other disengaged. The movable tube is also connected to a discharge tube for venting.

[0007] Preferably, a blocking block is movably provided inside the active tube, and the blocking block seals the upper end face of the active tube by default.

[0008] Preferably, the central tube and the adsorption tower have multiple recessed grooves on their opposite surfaces for the upper and lower adsorption plates to swing.

[0009] Preferably, the concave surface of the trough abuts against the upper and lower adsorption plates in the cross-state.

[0010] Preferably, the central tube and the adsorption tower are provided with a plurality of heat transfer fins arranged in a circumferential array on their opposite surfaces.

[0011] Preferably, the driving mechanism further includes a drive motor fixedly mounted on the adsorption tower; And a first transmission wheel and a second transmission wheel that mesh with the upper and lower toothed rings respectively; A transmission shaft is fixedly mounted on the output shaft of the drive motor, and a first transmission belt is provided between the transmission shaft and the first transmission wheel. A second transmission wheel is rotatably mounted on the upper ring frame, and a second transmission belt is provided between the second transmission wheel and the first transmission wheel.

[0012] Preferably, the first transmission wheel is provided with a trigger for detecting pressure, and the trigger is electrically connected to the drive motor.

[0013] Preferably, a drying layer is also included, which is fixedly disposed at the bottom of the adsorption tower and used for drying the intake air.

[0014] Preferably, a liquid extraction port is also provided on the opposite side of the central tube and the adsorption tower.

[0015] Preferably, the bottom end of the central tube is provided with a converging port.

[0016] In the above technical solution, the present invention provides a temperature-switching adsorption industrial hydrogen purification device, which has the following beneficial effects: by setting a movable adsorption bed, the raw gas has two flow paths. The raw gas passes through the upper surface of the upper and lower adsorption plates for impurity removal in the initial flow path, and then switches to another flow path to pass through the lower surface of the upper and lower adsorption plates for impurity removal. This avoids the "saturation" problem caused by impurities clogging the adsorbent on one side. At the same time, the oscillation can drive the adsorbent particles to flow and disperse evenly. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is an overall three-dimensional schematic diagram provided for an embodiment of the present invention; Figure 2 This is a cross-sectional view of the adsorption tower provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the adsorption tower provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the movable adsorption bed structure provided in an embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the movable adsorption bed provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the upper ring frame and upper adsorption plate structure provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the lower ring frame and lower adsorption plate structure provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the cross-state of the movable adsorption bed in the adsorption process provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the parallel state of the movable adsorption bed in the adsorption process provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the parallel state of the movable adsorption bed in the desorption process provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the cross-state of the movable adsorption bed in the desorption process provided in an embodiment of the present invention; Figure 12 Provided for embodiments of the present invention Figure 11Enlarged schematic diagram of structure A in the middle; Figure 13 This is a schematic diagram of the structure of the second transmission wheel and the first transmission wheel provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of the movable tube and electric telescopic rod structure provided in an embodiment of the present invention; Figure 15 This is a schematic diagram of the internal blockage structure of the active tube provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Adsorption tower; 11. Baffle; 12. Bottom port; 13. Movable pipe; 131. Inlet; 132. Block; 133. Elastic element; 14. Electric telescopic rod; 16. Through pipe; 2. Inlet pipe; 21. Inlet valve; 23. Air port; 3. Fixing frame; 31. Upper ring frame; 311. Upper gear ring; 312. Upper adsorption plate; 313. First bevel gear; 314. First folding plate; 315. Upper bevel gear; 316. Upper gear; 32. Lower ring frame; 321. Lower gear ring; 322. Lower adsorption plate; 323. 324. Second bevel gear; 325. Lower bevel gear; 326. Lower gear; 33. Second transmission wheel; 34. First transmission wheel; 341. First transmission belt; 342. Second transmission belt; 343. Pressing side; 344. Driving side; 345. Rotating rod; 35. Trigger; 4. Heat transfer fins; 5. Socket groove; 6. Drive motor; 61. Transmission shaft; 7. Drying layer; 8. Discharge pipe; 9. Central pipe; 91. Converging port; 92. Top opening; 93. Liquid extraction port; 94. Liquid outlet; 95. Flow channel. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-15 As shown, a temperature-switching adsorption industrial hydrogen purification device includes an adsorption tower 1 and a central tube 9 coaxially disposed within the adsorption tower 1. The movable adsorption bed located between the central tube 9 and the inner wall of the adsorption tower 1 includes a fixed frame 3, which has an upper ring frame 31 and a lower ring frame 32 facing each other. It also includes an upper adsorption plate 312 and a lower adsorption plate 322 respectively rotatably disposed on the upper ring frame 31 and the lower ring frame 32. Figure 4 (as shown) The upper toothed ring 311 is rotatably mounted on the upper ring frame 31 and the lower toothed ring 321 is rotatably mounted on the lower ring frame 32; A first bevel gear 313 is fixedly mounted at the first end of the upper adsorption plate 312. An upper bevel gear 315, which meshes with the first bevel gear 313, is rotatably mounted on the upper ring frame 31. An upper gear 316, which meshes with the upper gear ring 311, is fixedly mounted on the upper bevel gear 315. Figure 6 (as shown) A second bevel gear 323 is fixedly mounted at the first end of the lower adsorption plate 322. A lower bevel gear 325 that meshes with the second bevel gear 323 is rotatably mounted on the lower ring frame 32. A lower gear 326 that meshes with the lower gear ring 321 is fixedly mounted on the lower bevel gear 325. Figure 7 (as shown) It also includes a drive mechanism for driving the upper gear ring 311 and the lower gear ring 321 to rotate simultaneously; The upper adsorption plate 312 and the lower adsorption plate 322 are driven to rotate to switch between two states: cross and parallel. The movable tube 13, which is slidably disposed at the port of the central tube 9, has two working positions during its movement: coupling with the central tube 9 and disengaging from it. The movable tube 13 is also connected to the discharge tube 8 for venting.

[0022] Specifically, the fixing frame 3 is detachably arranged in a linear array within the adsorption tower 1. The upper adsorption plate 312 and the lower adsorption plate 322 are both arranged in a circumferential array. A first folding plate 314 is fixedly arranged between the upper adsorption plates 312, and a second folding plate 324 is fixedly arranged between the lower adsorption plates 322. The first folding plate 314 and the second folding plate 324 provide a margin of movement when the adsorption plates (i.e., the upper adsorption plate 312 and the lower adsorption plate 322) swing, so that the multiple adsorption plates form a unified surface guiding the airflow. The rotating end of the adsorption plate is the head end, and the opposite swinging end is the tail end.

[0023] A wire mesh is laid on the adsorption plate, and the pore size of the wire mesh is smaller than that of the adsorbent particles. The adsorbent particles can be high-efficiency activated carbon particles. Inert materials are stacked between the wire mesh and the adsorbent. The arrangement of the adsorbent and the wire mesh are common technical knowledge known to those skilled in the art, and will not be described in detail here.

[0024] It also includes an air inlet pipe 2 fixedly installed at the top of the adsorption tower 1 for air intake, an air inlet valve 21 is provided on it, and an air port 23 extending into the interior of the adsorption tower 1 is fixedly installed on the air inlet pipe 2, and the air port 23 is located between the central pipe 9 and the inner wall of the adsorption tower 1. A through pipe 16 is fixedly installed at the bottom of the adsorption tower 1.

[0025] The central tube 9 is a hollow cylindrical structure, and the top of the central tube 9 is provided with an upper opening 92. A baffle 11 is fixedly installed on the inner wall of the adsorption tower 1 at the corresponding part of the upper opening 92.

[0026] Furthermore, by default, the tail ends of the upper adsorption plate 312 and the lower adsorption plate 322 are higher than the head ends (e.g., Figure 8As shown), the raw material gas is introduced through the gas inlet 23. The raw material gas is guided by the cross-arranged upper adsorption plate 312 and lower adsorption plate 322 and flows from top to bottom along a Z-shaped path (as shown). Figure 8 (As shown by the gray arrow in the middle) Compared with conventional axial flow, this device extends the adsorption path and improves the adsorption and purification effect.

[0027] After the raw gas reaches the bottom of the adsorption tower 1, a portion flows out along the through pipe 16, while the other portion enters the bottom of the central pipe 9 and flows from bottom to top. This portion of the raw gas eventually flows out from the top opening 92 and diffuses along the side of the baffle 11, then flows downwards again with the raw gas in the gas inlet 23, forming a cycle to thoroughly purify the raw gas. When the upper adsorption plate 312 and lower adsorption plate 322 adsorb impurities, the adsorbent particles on the upper surface of the upper and lower adsorption plates 312 and 322 trap the impurities inside the particles. At this time, the weight of the upper and lower adsorption plates 312 and 322 increases. Under the influence of their own weight, the tail ends of the upper and lower adsorption plates 312 and 322 swing downwards. Subsequently, the upper and lower adsorption plates 312 and 322 rotate until the tail ends are flush with the head ends (see below for specific transmission methods). At this time, the upper and lower adsorption plates 312 and 322 form a... Figure 9 The parallel state shown.

[0028] In a parallel state, when the raw material gas flows downward from the gas inlet 23, it will first flow along the upper surface of the upper adsorption plate 312 from the center of the adsorption tower 1 to the circumference. After being blocked at the circumference, it will turn back and flow along the upper surface of the lower adsorption plate 322 towards the center (e.g., Figure 9 (As shown by the solid line in the middle) At this time, the raw material gas flows through the lower surface of the upper adsorption plate 312 and is adsorbed by the adsorbent on the lower surface of the upper adsorption plate 312. When it flows along the upper surface of the next level upper adsorption plate 312, the raw material gas flows through the lower surface of the lower adsorption plate 322 and is adsorbed by the adsorbent on the lower surface of the lower adsorption plate 322. This achieves an axial-radial coordinated flow mode, making the flow mode of the raw material gas more flexible. It also ensures that the adsorbent on both the upper and lower surfaces of the upper adsorption plate 312 and the lower adsorption plate 322 can be fully utilized, avoiding the "saturation" problem caused by impurities clogging the adsorbent on one side. Furthermore, since the adsorbent particles are filled in the wire mesh on the adsorption plate, when the adsorption plate swings, it drives the adsorbent particles to flow in the wire mesh, which plays a role in uniformly adsorbing the adsorbent particles.

[0029] It also includes an electric telescopic rod 14 fixedly installed at the bottom of the adsorption tower 1, the output end of which is fixedly connected to the movable tube 13 (e.g., Figure 14As shown, the movable tube 13 is driven to move vertically by the electric telescopic rod 14, and the movable tube 13 is slidably sleeved at the bottom of the adsorption tower 1. At the highest point, the movable tube 13 is in close contact with the central tube 9. At this time, the movable tube 13 and the central tube 9 are in a coupled state and are connected to each other. After the movable tube 13 moves down, it is no longer in close contact with the central tube 9, and the two are no longer connected.

[0030] It also includes a drive motor 6 fixedly mounted on the adsorption tower 1, wherein the upper gear 316 and the lower gear 326 are respectively rotatably mounted on the inner ring of the upper gear ring 311 and the outer ring of the lower gear ring 321 (e.g., Figure 4 (As shown), and the first bevel gear 313 and the second bevel gear 323 are respectively disposed on the same side of the upper adsorption plate 312 and the lower adsorption plate 322, so as to Figure 6 and Figure 7 The direction indicated by the middle arrow is counterclockwise. The first bevel gear 313 and the second bevel gear 323 are respectively located on the clockwise side of the upper adsorption plate 312 and the clockwise side of the lower adsorption plate 322.

[0031] The drive mechanism drives the upper gear ring 311 and the lower gear ring 321 to rotate in the same direction and keep them synchronized (see below for details of the transmission method), so that the upper gear ring 311 and the lower gear ring 321 rotate counterclockwise synchronously (e.g., Figure 6 and Figure 7 (As indicated by the middle arrow).

[0032] by Figure 6 and Figure 7 As shown, the upper gear ring 311 then drives the upper gear 316 to rotate counterclockwise, and the lower gear ring 321 drives the lower gear 326 to rotate clockwise, thereby causing the upper bevel gear 315 and the lower bevel gear 325 to rotate in opposite directions. The counterclockwise rotating upper bevel gear 315 drives the first bevel gear 313 to rotate counterclockwise, and the upper adsorption plate 312 swings downward (as shown). Figure 6 (As indicated by the middle arrow), and the clockwise rotating lower bevel gear 325 will drive the second bevel gear 323 to rotate, thereby causing the lower adsorption plate 322 to swing downwards synchronously (as shown by the middle arrow). Figure 7 (As indicated by the middle arrow), the upper adsorption plate 312 and the lower adsorption plate 322 can swing downwards or upwards simultaneously, ensuring that the rotation angle of the upper adsorption plate 312 and the lower adsorption plate 322 is controllable.

[0033] In the above technology, by setting a movable adsorption bed, the raw gas has two flow paths. The raw gas passes through the upper surfaces of the upper adsorption plate 312 and the lower adsorption plate 322 for impurity removal in the initial flow path, and then switches to another flow path to pass through the lower surfaces of the upper adsorption plate 312 and the lower adsorption plate 322 for impurity removal. This avoids the "saturation" problem caused by impurities clogging the adsorbent on one side. At the same time, the swinging motion can drive the adsorbent particles to flow and disperse evenly.

[0034] As a further embodiment of the present invention, a blocking block 132 is movably disposed inside the movable tube 13 (e.g., ...). Figure 12 As shown), and the block 132 blocks the upper surface of the active pipe 13 by default.

[0035] Specifically, the top of the movable tube 13 has a funnel-shaped inlet 131, and a plug 132 is located inside the inlet 131. Multiple elastic elements 133 are fixedly installed on the plug 132 to ensure that the plug 132 fits tightly against the inner wall of the inlet 131 (e.g., ...). Figure 15 As shown), at this time, block 132 blocks the inlet 131.

[0036] When the adsorption tower 1 enters the adsorbent regeneration stage, high-temperature raw material gas is first injected through the pipe 16 so that the adsorbent particles in the movable adsorption bed are desorbed and regenerated at high temperature. Then, the desorbed impurities are removed by the purging of the high-temperature raw material gas, and then cooling gas is introduced to help the movable adsorption bed return to the adsorption state (the above technology is the conventional working process of the variable temperature adsorption tower, which will not be described in detail here).

[0037] The bottom end of the adsorption tower 1 is provided with a bottom port 12 that is connected to the through pipe 16. A drying layer 7 is fixedly provided on the bottom port 12 to dehydrate and dry the purge gas.

[0038] When high-temperature raw material gas is introduced, the inlet valve 21 is closed, causing the gas port 23 to close. Simultaneously, the movable pipe 13 is driven upwards via the electric telescopic rod 14 until the movable pipe 13 is coupled and connected to the central pipe 9 (e.g., Figure 10 As shown), at this time, the protrusion at the bottom of the central tube 9 pushes against the blocking block 132, causing the blocking block 132 to be misaligned from the inlet 131 and no longer blocking the inlet 131. The high-temperature raw material gas enters the bottom of the adsorption tower 1 from the through pipe 16 and flows upward. The movable adsorption bed remains in a horizontal state, that is, the upper adsorption plate 312 and the lower adsorption plate 322 are parallel to each other. The high-temperature raw material gas will flow along the... Figure 10 The path shown by the dashed line indicates that the purging direction of the high-temperature raw material gas is opposite to the flow direction of the raw material gas in the adsorption stage. This is equivalent to purging against the original adsorption direction, avoiding the problem of the airflow blowing in the same direction further sending impurities into the adsorbent particles and causing blockage, thus improving purging efficiency. After reaching the top of the adsorption tower 1, the purging high-temperature raw material gas is guided by the baffle 11 to converge at the top opening 92. Then, the purging gas flows from top to bottom along the inner wall of the central tube 9. The purging airflow then enters the movable tube 13 through the inlet 131, and finally discharges the purged impurities to the outside through the outlet pipe 8.

[0039] Then cooling gas is introduced, and the initial flow path of the cooling gas is the same as that of the feed gas, such as... Figure 10As shown by the dashed arrows, multiple adsorption plates are cooled by layer-by-layer flow. However, since the upper adsorption plate 312 and the lower adsorption plate 322 are at a high temperature after being purged by the raw material gas, when the cooling gas comes into contact with the high-temperature surface, the temperature of the residual gaseous moisture inside the adsorbent particles drops below the dew point, forming liquid water. If this is not treated, the adsorbent particles may become damp.

[0040] In this invention, when condensation occurs in the upper adsorption plate 312 and the lower adsorption plate 322, the weight of the upper adsorption plate 312 and the lower adsorption plate 322 increases, causing the tail end of the adsorption plate to tend to swing downward again. The upper adsorption plate 312 and the lower adsorption plate 322 rotate until the tail end is lower than the head end (see below for details of the specific transmission method). Figure 11 As shown, at this time, the condensation in the upper adsorption plate 312 and the lower adsorption plate 322 will automatically flow and drip to the tail end of the adsorption plate due to its own weight, until the condensation gathers at the bottom of the adsorption tower 1. The condensation will flow into the drying layer 7 and be absorbed, thus preventing water vapor from remaining in the adsorption tower 1.

[0041] As another embodiment of the present invention, a plurality of recessed grooves 5 are provided on the opposite surfaces of the central tube 9 and the adsorption tower 1 for the upper adsorption plate 312 and the lower adsorption plate 322 to swing.

[0042] Specifically, the concave surface of the groove 5 abuts against the upper adsorption plate 312 and the lower adsorption plate 322 in the crossed state. The crossed state of the upper adsorption plate 312 and the lower adsorption plate 322 includes two states: tail end on top and tail end on bottom. When the tail end is on top, the tail end of the adsorption plate abuts against the upper end of the concave surface; when the tail end is on bottom, the tail end of the adsorption plate abuts against the lower end of the concave surface. The concave surface restricts the swing angle of the adsorption plate, and in the crossed state of the adsorption plates, the groove 5 abuts against the adsorption plate, thereby providing support for the adsorption plate.

[0043] Furthermore, the curvature of the trough 5 is greater than the curvature of the adsorption plate's oscillation trajectory. Therefore, when the adsorption plate is in a parallel state, there is a gap between the trough 5 and the tail end of the adsorption plate (e.g., Figure 9 and Figure 10 As shown in the figure, this allows the airflow to flow through the gap, that is, the airflow diffuses to both sides on one side of the adsorption plate and then converges on the other side. The airflow will "surround" the upper and lower sides of the adsorption plate, thereby performing sufficient adsorption or purging.

[0044] As another embodiment of the present invention, a plurality of heat transfer fins 4 are arranged in a circumferential array on the opposite surfaces of the central tube 9 and the adsorption tower 1.

[0045] Specifically, heat transfer fins 4 are respectively installed on the outer wall of the central tube 9 and the inner wall of the adsorption tower 1, and are positioned between two recessed grooves 5. The heat transfer fins 4 are made of materials with good thermal conductivity, such as copper. During the high-temperature purging stage, the high-temperature raw material gas rises layer by layer and purges the adsorption plates, while simultaneously conducting heat to the heat transfer fins 4. The heat from the heat transfer fins 4 rises, and combined with the concave surface of the recessed grooves 5, a high-temperature zone is formed within the recessed grooves 5. This zone compensates for the heat loss of the high-temperature raw material gas during radial diffusion in each layer, thus uniformly balancing the temperature within the adsorption tower 1. Furthermore, because the heat transfer fins 4 heat the central tube 9, the high-temperature raw material gas loses heat as it rises from the bottom to the top of the adsorption tower 1. When it flows from the top to the bottom of the central tube 9, it is reheated within the central tube 9, compensating for some of the heat loss. This ensures that the high-temperature raw material gas retains a relatively high temperature after flowing out along the discharge pipe 8, allowing it to be used in other stages or reintroduced into the adsorption tower 1 after impurity removal, thereby improving the efficiency of waste heat utilization.

[0046] During the cooling process, the cooling gas first rises layer by layer and blows through the adsorption plates, cooling down the high-temperature areas formed during the high-temperature blowing process. Since the cold air is heavier and the hot air is lighter, the hot air in the bottom high-temperature area rises while being cooled, pushing the hot air in the next layer up. The hot air in the upper layer is squeezed into the central pipe 9 and flows out of the adsorption tower 1, thus causing the temperature of the adsorption tower 1 to gradually decrease from top to bottom, forming a stepped temperature zone. The cold air cools layer by layer, reducing the problem of thermal stress concentration caused by excessive temperature difference.

[0047] During this process, the heat transfer fins 4 transfer low temperatures again, creating a low-temperature region within the recessed groove 5. When the upper adsorption plate 312 and lower adsorption plate 322 swing down to their tail ends, this low-temperature region is located at the tail end of the adsorption plates and forms a semi-enclosed space with the recessed groove 5. The flow velocity in the low-temperature region is very slow, while the cold air flows along the path formed between the head ends of the upper adsorption plate 312 and lower adsorption plate 322. The flow velocity of the cold air is faster than that in the low-temperature region, creating a pressure difference. This causes the cold air in the low-temperature region to automatically replenish the flowing cold air (e.g., Figure 12 (As shown by the dashed line).

[0048] As another embodiment of the present invention, the driving mechanism further includes a driving motor 6 fixedly disposed on the adsorption tower 1; And a first transmission wheel 34 and a second transmission wheel 33 that mesh with the upper toothed ring 311 and the lower toothed ring 321 respectively; A transmission shaft 61 is fixedly mounted on the output shaft of the drive motor 6, and a first transmission belt 341 is provided between the transmission shaft 61 and the first transmission wheel 34. A second transmission wheel 33 is rotatably mounted on the upper ring frame 31, and a second transmission belt 342 is provided between the second transmission wheel 33 and the first transmission wheel 34.

[0049] Specifically, a trigger element 35 for detecting pressure is provided inside the first transmission wheel 34, and the trigger element 35 is electrically connected to the drive motor 6. Figure 4 With the indicated direction as a reference, after starting the drive motor 6, the output shaft of the drive motor 6 drives the transmission shaft 61 to rotate clockwise, thereby driving the first transmission wheel 34 to rotate clockwise via the first transmission belt 341. Simultaneously, the first transmission wheel 34 drives the second transmission wheel 33 to rotate clockwise via the second transmission belt 342 (see below for details of the transmission method). That is, the first transmission wheel 34 drives the upper toothed ring 311 to rotate counterclockwise through meshing transmission, while the second transmission wheel 33 drives the lower toothed ring 321 to rotate counterclockwise through meshing transmission. The rotation directions of the upper toothed ring 311 and the lower toothed ring 321 are the same and remain synchronized.

[0050] The first transmission wheel 34 is rotatably connected to the rotating rod 345 (e.g., Figure 13 As shown), a semi-circular plate is provided on the rotating rod 345, and a chamber for the semi-circular plate to rotate is opened in the first transmission wheel 34. The chamber has a pressure-resistant side 343 and a driving side 344. A trigger 35 is provided on the pressure-resistant side 343, which is the pressure measuring part of the pressure sensor.

[0051] by Figure 7 The indicated direction is for reference. When the lower adsorption plate 322 experiences a weight change due to adsorbing impurities or condensation, it tends to swing downwards. The lower adsorption plate 322 drives the second bevel gear 323 to rotate. At this time, the second bevel gear 323 drives the lower bevel gear 325 to rotate clockwise, that is, the lower gear 326 rotates clockwise. The lower gear 326 then drives the lower gear ring 321 to rotate counterclockwise. The lower gear ring 321 drives the second transmission wheel 33 to rotate clockwise. The second transmission wheel 33 then drives the rotating rod 345 to rotate clockwise via the second transmission belt 342 (e.g., Figure 13 As shown), the rotating rod 345 drives the semi-circular plate closer to the pressure side 343, at which time the trigger 35 is subjected to pressure.

[0052] When the pressure reaches a certain threshold, the pressure sensor transmits the pressure signal to the controller, which then starts the drive motor 6. The drive motor 6 drives the transmission shaft 61 to output a fixed torque. At this time, the transmission shaft 61 drives the first transmission wheel 34 to continue rotating clockwise through the first transmission belt 341, thereby causing the upper adsorption plate 312 to swing down and causing the drive side 344 to rotate. This causes the drive side 344 to drive the rotating rod 345 to rotate clockwise through the blocking semi-circular plate. Figure 13 (The direction shown is for reference). The rotating rod 345 then drives the second transmission wheel 33 to rotate through the second transmission belt 342, thereby causing the lower adsorption plate 322 to swing down further.

[0053] With the above structure, the weight change on the lower adsorption plate 322 can be fed back to the second transmission wheel 33, which then drives the rotating rod 345 to rotate and press the trigger 35. The trigger 35 transmits the signal to the pressure sensor, and then the controller starts the drive motor 6. The drive motor 6 drives the two adsorption plates to swing down further, controlling the angle of each adsorption plate swing. After all the steps are completed, the drive motor 6 drives the adsorption plates to reset.

[0054] As another embodiment of the present invention, it also includes a liquid extraction port 93 disposed on the opposite surface of the central tube 9 and the adsorption tower 1.

[0055] Specifically, it also includes flow channels 95 disposed on the outer wall of the central tube 9 and the inner wall of the adsorption tower 1, wherein the flow channels 95 are connected to the liquid extraction port 93, the bottom end of the central tube 9 is provided with a converging port 91, and a liquid outlet 94 is provided between the converging port 91 and the flow channels 95, and the bottom end of the flow channels 95 on the inner wall of the adsorption tower 1 is connected to the interior of the adsorption tower 1 (e.g., Figure 12 (As shown).

[0056] In the adsorption stage, after the raw gas reaches the bottom of the adsorption tower 1, it flows upward along the converging port 91. At this time, the cross-section of the raw gas expands, which slows down the speed of the raw gas. Some impurities present in it will remain in the central tube 9 during the slow flow. These impurities fall down in the central tube 9 under the action of gravity and then remain on the inner wall of the converging port 91. In the high-temperature purging stage, these impurities will be discharged together.

[0057] During the cooling process, the upper adsorption plate 312 and the lower adsorption plate 322 rotate until the tail end is lower than the head end, such as... Figure 11 As shown, at this time, the condensate in the upper adsorption plate 312 and the lower adsorption plate 322 will automatically flow and drip towards the tail end of the adsorption plate due to its own weight. A small amount of condensate will move towards the pitted groove 5 along the tail end of the adsorption plate and eventually enter the liquid extraction port 93. The cooling gas in the central tube 9 is constricted by the converging port 91 during its downward flow, which reduces the cross-section of the cooling gas, increases the flow rate of the cooling gas, and decreases the pressure. This causes a slight suction effect at the lower end of the converging port 91, which helps to guide the small amount of condensate that has gathered near the liquid extraction port 93 to the liquid outlet 94 and carry it away with the cooling airflow. The condensate then flows into the movable tube 13 with the cooling gas and is discharged. This is mainly used to enhance the drainage capacity of the central tube 9 area.

[0058] The flow channel 95 located on the inner wall of the adsorption tower 1 discharges the condensate into the bottom of the adsorption tower 1, and this portion of the condensate eventually enters the drying layer 7. The flow channel 95 on the central pipe 9 can reduce the amount of condensate and reduce the burden on the drying layer 7.

[0059] Working principle: By default, the tail ends of the upper adsorption plate 312 and the lower adsorption plate 322 are higher than the head ends (e.g., Figure 8As shown), the raw material gas is introduced through the gas inlet 23. The raw material gas is guided by the cross-arranged upper adsorption plate 312 and lower adsorption plate 322 and flows from top to bottom along a Z-shaped path (as shown). Figure 8 (As shown by the gray arrow in the middle) Compared with conventional axial flow, this device extends the adsorption path and improves the adsorption and purification effect.

[0060] After the upper adsorption plate 312 and the lower adsorption plate 322 adsorb impurities, their tail ends swing downwards. Then, the upper adsorption plate 312 and the lower adsorption plate 322 rotate until their tail ends are flush with their head ends. At this point, the upper adsorption plate 312 and the lower adsorption plate 322 form a... Figure 9 The parallel state shown.

[0061] In a parallel state, when the raw material gas flows downward from the gas inlet 23, it will first flow along the upper surface of the upper adsorption plate 312 from the center to the circumference. After being blocked at the circumference, it will turn back and flow along the upper surface of the lower adsorption plate 322 towards the center.

[0062] When high-temperature raw material gas is introduced, the inlet valve 21 is closed, causing the gas port 23 to close. Simultaneously, the movable pipe 13 is driven upwards via the electric telescopic rod 14 until the movable pipe 13 is coupled and connected to the central pipe 9 (e.g., Figure 10 As shown), at this time, the protrusion at the bottom of the central tube 9 pushes against the blocking block 132, causing the blocking block 132 to be misaligned from the inlet 131 and no longer blocking the inlet 131. The high-temperature raw material gas enters the bottom of the adsorption tower 1 from the through pipe 16 and flows upward. The movable adsorption bed remains in a horizontal state, that is, the upper adsorption plate 312 and the lower adsorption plate 322 are parallel to each other. The high-temperature raw material gas will flow along the... Figure 10 The path flow is indicated by the dashed line.

[0063] Then cooling gas is introduced, and the initial flow path of the cooling gas is the same as that of the high-temperature raw material gas, such as... Figure 10 As shown by the dashed arrow, when condensation occurs in the upper adsorption plate 312 and the lower adsorption plate 322, the weight of the upper adsorption plate 312 and the lower adsorption plate 322 increases, causing the tail end of the adsorption plate to tend to swing downwards. The upper adsorption plate 312 and the lower adsorption plate 322 rotate until the tail end is lower than the head end. At this time, the condensation in the upper adsorption plate 312 and the lower adsorption plate 322 will automatically flow and drip to the tail end of the adsorption plate due to its own weight.

[0064] The flow channel 95 located on the inner wall of the adsorption tower 1 discharges the condensate into the bottom of the adsorption tower 1, and the condensate in this part eventually enters the drying layer 7.

[0065] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A temperature-switching adsorption industrial hydrogen purification device, comprising an adsorption tower (1), characterized in that, Including the central tube (9) coaxially disposed within the adsorption tower (1); The movable adsorption bed located between the central tube (9) and the inner wall of the adsorption tower (1) includes a fixed frame (3), and the fixed frame (3) has an upper ring frame (31) and a lower ring frame (32) opposite to each other, and also includes an upper adsorption plate (312) and a lower adsorption plate (322) respectively rotatably disposed on the upper ring frame (31) and the lower ring frame (32). The upper toothed ring (311) is rotatably mounted on the upper ring frame (31) and the lower toothed ring (321) is rotatably mounted on the lower ring frame (32). The first bevel gear (313) is fixedly provided at the first end of the upper adsorption plate (312), and the upper bevel gear (315) that meshes with the first bevel gear (313) is rotatably provided on the upper ring frame (31), and the upper gear (316) that meshes with the upper gear ring (311) is fixedly provided on the upper bevel gear (315). The first end of the lower adsorption plate (322) is fixedly provided with a second bevel gear (323), and the lower ring frame (32) is rotatably provided with a lower bevel gear (325) that meshes with the second bevel gear (323). The lower bevel gear (325) is fixedly provided with a lower gear (326) that meshes with the lower gear ring (321). It also includes a drive mechanism for driving the upper gear ring (311) and the lower gear ring (321) to rotate simultaneously; The upper adsorption plate (312) and the lower adsorption plate (322) are driven to rotate to switch between two states: cross and parallel. The movable tube (13) is slidably set at the port of the central tube (9). During its active stroke, it has two stations: coupling with the central tube (9) and dissociation. The movable tube (13) is connected to the discharge tube (8) for exhaust.

2. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, A blocking block (132) is movably installed inside the active tube (13), and the blocking block (132) blocks the upper surface of the active tube (13) by default.

3. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, Multiple recessed grooves (5) are provided on the opposite surfaces of the central tube (9) and the adsorption tower (1) for the upper adsorption plate (312) and the lower adsorption plate (322) to swing.

4. The temperature-switching adsorption industrial hydrogen purification device according to claim 3, characterized in that, The concave surface of the trough (5) abuts against the upper adsorption plate (312) and the lower adsorption plate (322) in the cross state.

5. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, Multiple heat transfer fins (4) are arranged in a circumferential array on the opposite surfaces of the central tube (9) and the adsorption tower (1).

6. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, The driving mechanism also includes a drive motor (6) fixedly mounted on the adsorption tower (1). And a first transmission wheel (34) and a second transmission wheel (33) that mesh with the upper toothed ring (311) and the lower toothed ring (321) respectively. A transmission shaft (61) is fixedly provided on the output shaft of the drive motor (6), and a first transmission belt (341) is provided between the transmission shaft (61) and the first transmission wheel (34). The upper ring frame (31) is rotatably provided with a second transmission wheel (33), and a second transmission belt (342) is provided between the second transmission wheel (33) and the first transmission wheel (34).

7. The temperature-switching adsorption industrial hydrogen purification device according to claim 6, characterized in that, The first transmission wheel (34) is provided with a trigger (35) for detecting pressure, and the trigger (35) is electrically connected to the drive motor (6).

8. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, It also includes a drying layer (7) that is fixedly installed at the bottom of the adsorption tower (1) and used to dry the intake air.

9. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, It also includes a liquid extraction port (93) located on the opposite side of the central tube (9) and the adsorption tower (1).

10. The temperature-switching adsorption industrial hydrogen purification device according to claim 1, characterized in that, The bottom end of the central tube (9) is provided with a converging port (91).

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