A temperature swing adsorption industrial hydrogen purification device

Abstract

The application discloses a kind of variable-temperature adsorption industrial hydrogen purification device, it is related to hydrogen purification technical field, including adsorption tower, including coaxially arranged in adsorption tower's central tube;Between movable adsorption bed layer of central tube and adsorption tower inner wall, it includes fixing frame, and fixed frame has opposite upper ring frame and lower ring frame, and it further includes respectively rotatingly arranged in upper ring frame and lower ring frame upper adsorption plate and lower adsorption plate.The variable-temperature adsorption industrial hydrogen purification device is by setting movable adsorption bed layer, so that raw material gas has two flow paths, raw material gas is under initial flow path by the upper surface of upper adsorption plate and lower adsorption plate to carry out impurity removal, then switch to another flow path again, and then by the lower surface of upper adsorption plate and lower adsorption plate to carry out impurity removal, to avoid the problem of "saturation" caused by single-face adsorbent being blocked by impurities, and simultaneously by swinging can drive adsorbent particle flow and evenly dispersed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen purification, in particular to a temperature swing adsorption industrial hydrogen purification device. BACKGROUND

[0002] A temperature swing adsorption industrial hydrogen purification device is a high-efficiency gas separation system designed based on the principle of temperature swing adsorption (TSA). High-efficiency activated carbon is used as the core adsorbent, and selective adsorption and desorption of impurities in hydrogen are achieved through periodic temperature changes. The device adsorbs impurities at low temperature and high pressure, and regenerates the adsorbent at high temperature and low pressure. The high-efficiency activated carbon significantly improves the adsorption capacity and cycle stability due to its high specific surface area and microporous structure, making it suitable for producing high-purity hydrogen (99.9% or higher) in the fields of refining and chemical industry, and having the advantages of low energy consumption and long service life.

[0003] In combination with the patent CN119367987A, published on January 28, 2025, a hydrogen preparation and purification device is disclosed. By setting a deoxidizer, a pre-drying tower, a first drying tower, a second drying tower, a condenser, a flow regulator, a regeneration gas heater, a regeneration gas condenser, and a plurality of control valves, the device realizes heating adsorption and condensation adsorption of hydrogen, effectively reduces hydrogen consumption, and ensures good purification effect of hydrogen. Since the hydrogen obtained by water electrolysis is relatively pure and has low impurity content, the device uses hydrogen to remove impurity oxygen under the catalytic action of a palladium catalyst, and then uses an active alumina and molecular sieve composite bed for temperature swing adsorption dehydration. The process is reasonable, simple, and low in energy consumption, and is easy to integrate into a system for small and medium-sized purification devices, saving land occupation and investment, and can be widely used in various industrial fields.

[0004] However, in the prior art including the above-mentioned patent, hydrogen often flows through the molecular sieve composite bed in a one-way (axial or radial) manner, and impurities will first fill the side of the molecular sieve that contacts hydrogen. After the voids on the contact surface are filled with impurities, it will be difficult for the impurities to pass through the contact surface to reach the interior of the molecular sieve, i.e., the molecular sieve is saturated only on the contact surface, but other parts of the molecular sieve do not contact hydrogen enough, reducing the overall utilization efficiency of the molecular sieve. SUMMARY

[0005] The present application aims to provide a temperature swing adsorption industrial hydrogen purification device to solve the above problems.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a temperature swing adsorption industrial hydrogen purification device, comprising an adsorption tower and a center pipe coaxially arranged in the adsorption tower;

[0007] The movable adsorption bed between the central pipe and the inner wall of the adsorption tower comprises a fixed frame, and the fixed frame has opposite upper and lower ring frames, and further comprises upper and lower adsorption plates rotatably arranged on the upper and lower ring frames respectively;

[0008] An upper tooth ring rotatably arranged on the upper ring frame and a lower tooth ring rotatably arranged on the lower ring frame;

[0009] A first bevel gear fixedly arranged at the head end of the upper adsorption plate, an upper bevel gear rotatably arranged on the upper ring frame and engaged with the first bevel gear, and an upper pinion fixedly arranged on the upper bevel gear and engaged with the upper tooth ring;

[0010] A second bevel gear fixedly arranged at the head end of the lower adsorption plate, a lower bevel gear rotatably arranged on the lower ring frame and engaged with the second bevel gear, and a lower pinion fixedly arranged on the lower bevel gear and engaged with the lower tooth ring;

[0011] Further comprising a driving mechanism for driving the upper and lower tooth rings to rotate simultaneously;

[0012] The upper and lower adsorption plates are driven to rotate to switch between the cross and parallel states;

[0013] An active pipe slidably arranged at the port of the central pipe, which has two working positions of coupling and decoupling with the central pipe in the active stroke, and the active pipe is connected with a discharge pipe for discharging exhaust gas.

[0014] Preferably, a plug is slidably arranged in the active pipe, and the plug blocks the upper end face of the active pipe in the default state.

[0015] Preferably, a plurality of nest-shaped grooves are formed on the opposite faces of the central pipe and the adsorption tower for swinging of the upper and lower adsorption plates.

[0016] Preferably, the concave surface of the nest-shaped groove abuts against the upper and lower adsorption plates in the cross state.

[0017] Preferably, a plurality of heat transfer fins are circumferentially arranged on the opposite faces of the central pipe and the adsorption tower.

[0018] Preferably, the driving mechanism further comprises a driving motor fixedly arranged on the adsorption tower;

[0019] and a first transmission wheel and a second transmission wheel engaged with the upper and lower tooth rings respectively for transmission;

[0020] A transmission shaft fixedly arranged on the output shaft of the driving motor, and a first transmission belt arranged between the transmission shaft and the first transmission wheel;

[0021] A second transmission wheel rotatably arranged on the upper ring frame, and a second transmission belt arranged between the second transmission wheel and the first transmission wheel.

[0022] Preferably, the first transmission wheel is provided with a trigger for detecting pressure, and the trigger is electrically connected with the driving motor.

[0023] Preferably, the device further comprises a drying layer fixedly arranged at the bottom end of the adsorption tower and used for drying the inlet air.

[0024] Preferably, the device further comprises a liquid suction port arranged on the opposite surface of the central pipe and the adsorption tower.

[0025] Preferably, the bottom end of the central pipe is provided with a converging port.

[0026] In the above technical solution, the variable adsorption bed layer is arranged to make the raw material gas have two flow paths, the raw material gas is purified by the upper surfaces of the upper adsorption plate and the lower adsorption plate in the initial flow path, and then is purified by the lower surfaces of the upper adsorption plate and the lower adsorption plate in the other flow path, so as to avoid the saturation problem caused by the single-face adsorbent being blocked by impurities, and the swing can drive the adsorbent particles to flow and be uniformly dispersed. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0028] Figure 1 The overall three-dimensional schematic diagram provided for the embodiments of the present application;

[0029] Figure 2 The internal cutaway schematic diagram of the adsorption tower provided for the embodiments of the present application;

[0030] Figure 3 The internal cutaway schematic diagram of the adsorption tower provided for the embodiments of the present application;

[0031] Figure 4 The schematic diagram of the movable adsorption bed layer structure provided for the embodiments of the present application;

[0032] Figure 5 The cutaway schematic diagram of the movable adsorption bed layer provided for the embodiments of the present application;

[0033] Figure 6 The schematic diagram of the upper ring frame and the upper adsorption plate structure provided for the embodiments of the present application;

[0034] Figure 7A structure schematic diagram of a lower ring frame and a lower adsorption plate provided by the embodiment of the present application is shown in the figure;

[0035] Figure 8 A schematic diagram of a movable adsorption bed layer cross state in the adsorption link provided by the embodiment of the present application is shown in the figure;

[0036] Figure 9 A schematic diagram of a movable adsorption bed layer parallel state in the adsorption link provided by the embodiment of the present application is shown in the figure;

[0037] Figure 10 A schematic diagram of a movable adsorption bed layer parallel state in the desorption link provided by the embodiment of the present application is shown in the figure;

[0038] Figure 11 A schematic diagram of a movable adsorption bed layer cross state in the desorption link provided by the embodiment of the present application is shown in the figure;

[0039] Figure 12 A structure schematic diagram of a second transmission wheel and a first transmission wheel provided by the embodiment of the present application is shown in the figure; Figure 11

[0040] Figure 13 A structure schematic diagram of a second transmission wheel and a first transmission wheel provided by the embodiment of the present application is shown in the figure;

[0041] Figure 14 A structure schematic diagram of a movable pipe and an electric telescopic rod provided by the embodiment of the present application is shown in the figure;

[0042] Figure 15 A structure schematic diagram of a movable pipe and an electric telescopic rod provided by the embodiment of the present application is shown in the figure.

[0043] Legend of the figures:

[0044] 1, adsorption tower; 11, baffle; 12, bottom port; 13, movable pipe; 131, inlet; 132, blocking block; 133, elastic member; 14, electric telescopic rod; 16, through pipe; 2, air inlet pipe; 21, air inlet valve; 23, air port; 3, fixed frame; 31, upper ring frame; 311, upper tooth 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 tooth ring; 322, lower adsorption plate; 323, second bevel gear; 324, second folding plate; 325, lower bevel gear; 326, lower gear; 33, second transmission wheel; 34, first transmission wheel; 341, first transmission belt; 342, second transmission belt; 343, pressure side; 344, driving side; 345, rotating rod; 35, trigger member; 4, heat transfer fin; 5, nest-shaped groove; 6, driving motor; 61, transmission shaft; 7, drying layer; 8, discharge pipe; 9, center pipe; 91, converging port; 92, upper top port; 93, liquid suction port; 94, liquid outlet port; 95, flow channel. DETAILED DESCRIPTION​

[0045] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0046] As shown in Figures 1-15 A temperature swing adsorption industrial hydrogen purification device, comprising an adsorption tower 1, a central tube 9 coaxially arranged in the adsorption tower 1;

[0047] A movable adsorption bed between the central tube 9 and the inner wall of the adsorption tower 1, comprising a fixing frame 3, and the fixing frame 3 has opposite upper and lower ring frames 31 and 32, and further comprising upper and lower adsorption plates 312 and 322 respectively rotatably arranged on the upper and lower ring frames 31 and 32 (as shown in Figure 4 );

[0048] An upper tooth ring 311 rotatably arranged on the upper ring frame 31 and a lower tooth ring 321 rotatably arranged on the lower ring frame 32;

[0049] The first end of the upper adsorption plate 312 is fixedly provided with a first bevel gear 313, and the upper ring frame 31 is rotatably provided with an upper bevel gear 315 engaged with the first bevel gear 313, and the upper bevel gear 315 is fixedly provided with an upper tooth gear 316 engaged with the upper tooth ring 311 (as shown in Figure 6 );

[0050] 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 engaged with the second bevel gear 323, and the lower bevel gear 325 is fixedly provided with a lower tooth gear 326 engaged with the lower tooth ring 321 (as shown in Figure 7 );

[0051] Further comprising a driving mechanism for driving the upper tooth ring 311 and the lower tooth ring 321 to rotate simultaneously;

[0052] The upper and lower adsorption plates 312 and 322 are driven to rotate to switch between the cross and parallel states;

[0053] A movable tube 13 slidably arranged at the port of the central tube 9, having two working positions of coupling and decoupling with the central tube 9 in the movable stroke of the movable tube 13, and the movable tube 13 is communicated with a discharge pipe 8 for discharging gas.

[0054] Specifically, the fixed frame 3 is detachably arranged in the adsorption tower 1 along a linear array, wherein the upper adsorption plates 312 and the lower adsorption plates 322 are arranged in a circumferential array, and the first flaps 314 are fixedly arranged between the upper adsorption plates 312, and the second flaps 324 are fixedly arranged between the lower adsorption plates 322, the first flaps 314 and the second flaps 324 are used to provide a movement allowance when the adsorption plates (i.e. the upper adsorption plates 312 and the lower adsorption plates 322) swing, so that the plurality of adsorption plates form a whole surface guiding the gas flow. Wherein, the rotating end of the adsorption plate is the head end, and the opposite swinging end is the tail end.

[0055] The steel wire mesh is laid on the adsorption plate, and the aperture of the steel wire mesh is smaller than that of the adsorbent particles. The adsorbent particles can use high-efficiency activated carbon particles. Inert materials are stacked between the steel wire mesh and the adsorbent. The arrangement of the adsorbent and the steel wire mesh is a common technical knowledge for those skilled in the art, which will not be repeated here.

[0056] It also includes an air inlet pipe 2 fixedly arranged at the top end of the adsorption tower 1 for air inlet, which is provided with an air inlet valve 21, and the air inlet pipe 2 is fixedly provided with a gas port 23 extending into the interior of the adsorption tower 1, and the gas port 23 is located between the central pipe 9 and the inner wall of the adsorption tower 1. The bottom of the adsorption tower 1 is fixedly provided with a through pipe 16.

[0057] The central pipe 9 is a hollow cylindrical structure, and the top end of the central pipe 9 is provided with an upper top opening 92. The inner wall of the adsorption tower 1 is fixedly provided with a baffle 11 at the corresponding position of the upper top opening 92.

[0058] Further, by default, the tail end of the upper adsorption plate 312 and the lower adsorption plate 322 is higher than the head end (as shown in Figure 8 The gas port 23 is connected to the raw material gas, and the raw material gas is guided by the cross-arranged upper adsorption plates 312 and lower adsorption plates 322 to flow along a zigzag path from top to bottom (as shown by the gray arrow in Figure 8 Compared with the conventional axial flow, the device plays a role in prolonging the adsorption path and improving the adsorption purification effect.

[0059] The raw material gas reaches the bottom of the adsorption tower 1, part of which flows out along the pipe 16, and the other part enters the bottom end of the center pipe 9 and flows from bottom to top, and finally the part of the raw material gas flows out from the upper top opening 92 and diffuses along the side of the baffle 11, and then flows downward again with the raw material gas in the gas port 23 to form a cycle to thoroughly purify the raw material gas; when the upper adsorption plate 312 and the lower adsorption plate 322 adsorb impurities, the adsorbent particles on the upper surface of the upper adsorption plate 312 and the lower adsorption plate 322 intercept the impurities inside the particles, at this time the weight of the upper adsorption plate 312 and the lower adsorption plate 322 increases, under the influence of gravity, the tail end of the upper adsorption plate 312 and the lower adsorption plate 322 swings downward, and then the upper adsorption plate 312 and the lower adsorption plate 322 rotate to the tail end flush with the head end (for details of the transmission mode, see below), at this time the upper adsorption plate 312 and the lower adsorption plate 322 form a parallel state as shown in Figure 9 . .

[0060] In the parallel state, when the raw material gas flows downward from the gas port 23, it will first flow along the upper surface of the upper adsorption plate 312 from the center to the periphery of the adsorption tower 1, and then turn back and flow along the upper surface of the lower adsorption plate 322 to the center after being blocked at the periphery (as shown by the solid line in Figure 9 ), 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, and then flows along the upper surface of the next level of the 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, which forms an axial-radial flow mode, making the flow mode of the raw material gas more flexible, and making the adsorbent on both the upper and lower surfaces of the upper adsorption plate 312 and the lower adsorption plate 322 fully utilized, avoiding the "saturation" problem caused by the blockage of the single-sided adsorbent by impurities, and because the adsorbent particles are filled in the steel wire mesh on the adsorption plate, when the adsorption plate swings, it drives the adsorbent particles to flow in the steel wire mesh, achieving uniform adsorbent particles.

[0061] It also includes an electric telescopic rod 14 fixedly arranged at the bottom of the adsorption tower 1, the output end of the electric telescopic rod 14 is fixedly connected with the movable pipe 13 (as shown in Figure 14 ), the movable pipe 13 is driven by the electric telescopic rod 14 to move vertically, and the movable pipe 13 is slidingly sleeved at the bottom end of the adsorption tower 1, wherein the movable pipe 13 is tightly attached to the center pipe 9 at the highest point, at this time the movable pipe 13 and the center pipe 9 are in a coupled state and communicate with each other, and after the movable pipe 13 moves downward, it is no longer tightly attached to the center pipe 9, and the two are no longer in communication.

[0062] It also includes a driving motor 6 fixedly arranged on the adsorption tower 1, wherein the upper gear 316 and the lower gear 326 are respectively rotationally arranged at the inner circle of the upper gear ring 311 and the outer circle of the lower gear ring 321 (as shown in 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.

[0063] 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).

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] When the adsorption tower 1 enters the adsorbent regeneration stage, first of all, high-temperature raw material gas needs to be injected through the pipe 16, so that the adsorbent particles in the movable adsorption bed are desorbed and regenerated at high temperature, and then the desorbed impurities are removed under the blowing of the high-temperature raw material gas, and then cooling gas is introduced to help the movable adsorption bed recover to the adsorption state (the above-mentioned technology is the working process of the conventional temperature swing adsorption tower, which will not be repeated here).

[0069] Among them, the bottom end of the adsorption tower 1 is provided with a bottom port 12 communicated with the pipe 16, and the bottom port 12 is fixedly provided with a drying layer 7 to dehydrate and dry the sweeping gas.

[0070] When the high-temperature raw material gas is introduced, the gas inlet valve 21 is closed, so that the gas port 23 is closed, and the movable pipe 13 is driven to rise by the electric telescopic rod 14 until the movable pipe 13 is coupled and communicated with the center pipe 9 (as shown in Figure 10 ), at this time, the protrusion at the bottom end of the center pipe 9 pushes the block 132, so that the block 132 is staggered with the inlet port 131 and no longer blocks the inlet port 131. The high-temperature raw material gas flows from the pipe 16 into the bottom of the adsorption tower 1 and flows upward, and the movable adsorption bed still maintains a horizontal state, that is, the upper adsorption plate 312 and the lower adsorption plate 322 are parallel to each other, and the high-temperature raw material gas flows along the path shown by the dotted line in Figure 10 , wherein the sweeping direction of the high-temperature raw material gas is opposite to the flow direction of the raw material gas in the adsorption link, which is equivalent to sweeping against the original adsorption direction, avoiding the problem that the gas flow in the forward direction further sends the impurities into the interior of the adsorbent particles to block them, and improving the sweeping efficiency. The sweeping high-temperature raw material gas is guided by the baffle 11 to converge into the upper top port 92 after reaching the top end of the adsorption tower 1, and then the sweeping gas flows from top to bottom along the inner wall of the center pipe 9, and the gas flow enters the movable pipe 13 through the inlet port 131, and finally the swept impurities are discharged to the outside through the discharge pipe 8.

[0071] Then cooling gas is introduced again, and the initial flow path of the cooling gas is consistent with that of the raw material gas, as shown by the dotted arrow in Figure 10 , which cools the multiple adsorption plates by layer-by-layer flow. However, since the temperature of the upper adsorption plate 312 and the lower adsorption plate 322 after being swept by the raw material gas is relatively high, when the cooling gas contacts the high-temperature surface, the water vapor remaining in the adsorbent particles will have its temperature reduced below the dew point, forming liquid water, which may cause the adsorbent particles to be damp if not treated.

[0072] In the present application, 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 swing downward again, and the upper adsorption plate 312 and the lower adsorption plate 322 rotate to the tail end lower than the head end (the specific transmission mode is described below), as shown inFigure 11 As shown, at this time, the condensation in the upper adsorption plate 312 and the lower adsorption plate 322 will be affected by the gravity and automatically flow and drop to the tail end of the adsorption plate, until the condensation converges to the bottom end of the adsorption tower 1, and the condensation will flow into the drying layer 7 and be absorbed, so as to avoid the water vapor staying in the adsorption tower 1.

[0073] As another embodiment provided by the present application, a plurality of nest-shaped grooves 5 for swinging the upper adsorption plate 312 and the lower adsorption plate 322 are arranged on the opposite surfaces of the center pipe 9 and the adsorption tower 1.

[0074] Specifically, the concave surface of the nest-shaped groove 5 abuts against the upper adsorption plate 312 and the lower adsorption plate 322 in the cross state. The cross state of the upper adsorption plate 312 and the lower adsorption plate 322 includes two states of the tail end up and the tail end down. When the tail end up, the tail end of the adsorption plate abuts against the upper end of the concave surface, and when the tail end down, the tail end of the adsorption plate abuts against the lower end of the concave surface. The swinging angle of the adsorption plate is limited by the concave surface, and the nest-shaped groove 5 abuts against the adsorption plate in the cross state of the adsorption plate, so as to provide a supporting force for the adsorption plate.

[0075] Further, the curvature of the nest-shaped groove 5 is greater than the curvature of the swinging track of the adsorption plate, so that there is a gap (as shown in Figure 9 and Figure 10 ) between the nest-shaped groove 5 and the tail end of the adsorption plate when the adsorption plate is in the parallel state, so that the airflow can flow through the gap, that is, the airflow diffuses to both sides on one side of the adsorption plate and converges on the other side, so that the airflow "surrounds" the upper and lower sides of the adsorption plate, thereby being fully adsorbed or purged.

[0076] As another embodiment provided by the present application, a plurality of heat transfer fins 4 are circumferentially arranged on the opposite surfaces of the center pipe 9 and the adsorption tower 1.

[0077] Specifically, the heat transfer fins 4 are arranged on the outer wall of the center pipe 9 and the inner wall of the adsorption tower 1, respectively, and the heat transfer fins 4 are arranged between two nest-shaped grooves 5, and the heat transfer fins 4 are made of copper or other materials with good heat conductivity. In the high-temperature purging link, the high-temperature raw material gas rises layer by layer and purges the adsorption plate, and at the same time, the heat transfer fins 4 are heated, and the heat rises through the heat transfer fins 4, and a high-temperature area is formed in the nest-shaped groove 5 in combination with the inner concave surface of the nest-shaped groove 5, which is used to make up for the heat loss of the high-temperature raw material gas in the radial diffusion process, and balances the temperature in the adsorption tower 1. And because the heat transfer fins 4 heat the center pipe 9, the high-temperature raw material gas loses heat in the process of rising from the bottom end to the top end of the adsorption tower 1, and then is heated again by the center pipe 9 when flowing from the top end to the bottom end of the center pipe 9, so as to make up for part of the high-temperature raw material gas, so that the high-temperature raw material gas still has a relatively high temperature after flowing out of the discharge pipe 8, which can be used for other links or after being removed of impurities to be introduced into the adsorption tower 1 again, thereby improving the efficiency of waste heat utilization.

[0078] When cooling, the cooling gas first rises layer by layer and sweeps the adsorption plate, and the high-temperature area formed in the high-temperature sweeping link is cooled by the cooling gas. Since the cooling gas is heavy and the hot gas is light, the hot air in the bottom layer of the high-temperature area rises while being cooled, and the hot air in the upper layer is pushed up, and the hot air in the upper layer is pushed into the central pipe 9 and flows out of the adsorption tower 1, so that the temperature of the adsorption tower 1 gradually decreases from top to bottom, forming a stepped temperature area, and the cooling gas is cooled layer by layer, reducing the thermal stress concentration problem caused by excessive temperature difference.

[0079] In this process, the heat transfer fin 4 again transfers low temperature, so that a low-temperature area is formed in the nest-shaped groove 5. When the upper adsorption plate 312 and the lower adsorption plate 322 swing to the tail end at the same time, the low-temperature area is located at the tail end of the adsorption plate and forms a semi-enclosed space with the nest-shaped groove 5. The flow rate of the low-temperature area is very slow, while the cooling gas flows along the path formed between the front ends of the upper adsorption plate 312 and the lower adsorption plate 322. The flow rate of the cooling gas is faster than that of the low-temperature area, forming a pressure difference, so that the cooling gas in the low-temperature area will automatically supplement into the flowing cooling gas (as shown by the dotted line). Figure 12

[0080] As another embodiment provided by the application, the driving mechanism further comprises a driving motor 6 fixedly arranged on the adsorption tower 1;

[0081] and a first transmission wheel 34 and a second transmission wheel 33 respectively meshing with the upper tooth ring 311 and the lower tooth ring 321 for transmission;

[0082] A transmission shaft 61 is fixedly arranged on the output shaft of the driving motor 6, and a first transmission belt 341 is arranged between the transmission shaft 61 and the first transmission wheel 34.

[0083] The second transmission wheel 33 is rotatably arranged on the upper ring frame 31, and a second transmission belt 342 is arranged between the second transmission wheel 33 and the first transmission wheel 34.

[0084] Specifically, the first transmission wheel 34 is provided with a trigger 35 for detecting pressure, and the trigger 35 is electrically connected with the driving motor 6. Figure 4 As shown in the direction, after starting the driving motor 6, the output shaft of the driving motor 6 drives the transmission shaft 61 to rotate clockwise, thereby driving the first transmission wheel 34 to rotate clockwise through the first transmission belt 341, and driving the second transmission wheel 33 to rotate clockwise through the second transmission belt 342 (the specific transmission mode is described below). That is, the first transmission wheel 34 drives the upper tooth ring 311 to rotate counterclockwise through meshing transmission, and the second transmission wheel 33 drives the lower tooth ring 321 to rotate counterclockwise through meshing transmission. The rotation directions of the upper tooth ring 311 and the lower tooth ring 321 are consistent and synchronous.

[0085] ​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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] Specifically, the flow channel 95 is arranged on the outer wall of the central pipe 9 and the inner wall of the adsorption tower 1, the flow channel 95 is communicated with the liquid suction port 93, the bottom end of the central pipe 9 is provided with a converging port 91, and the converging port 91 is communicated with the liquid outlet 94, and the bottom end of the flow channel 95 on the inner wall of the adsorption tower 1 is communicated with the inside of the adsorption tower 1 (as shown in Figure 12 ).

[0091] In the adsorption link, the raw material gas flows upwards along the converging port 91 after reaching the bottom of the adsorption tower 1, at this time, the cross section of the raw material gas is expanded, so that the speed of the raw material gas is slowed down, and part of the impurities existing in the raw material gas will stay in the central pipe 9 in the process of slow flow, and the part of the impurities will fall in the central pipe 9 under the action of gravity and stay on the inner wall of the converging port 91, in the high-temperature purging link, the part of the impurities will be discharged together.

[0092] In the cooling link, the upper adsorption plate 312 and the lower adsorption plate 322 are rotated to the tail end lower than the head end (as shown in Figure 11 ), at this time, the condensate in the upper adsorption plate 312 and the lower adsorption plate 322 will automatically flow and drop to the tail end of the adsorption plate under the influence of gravity, and a small amount of condensate will approach the nest-shaped groove 5 along the tail end of the adsorption plate and finally enter the liquid suction port 93. The cooling gas in the central pipe 9 flows downwards and is converged by the converging port 91, so that the cross section of the cooling gas is reduced, the flow rate of the cooling gas is increased and the pressure is reduced, so that the lower end of the converging port 91 produces a slight suction effect, which helps to guide the small amount of condensate collected near the liquid suction port 93 to the liquid outlet 94 and take away with the cooling gas flow, and the condensate is collected into the movable pipe 13 together with the cooling gas and discharged, which is mainly used to enhance the liquid discharge capacity of the central pipe 9 region.

[0093] The flow channel 95 arranged on the inner wall of the adsorption tower 1 discharges the condensate to the bottom of the adsorption tower 1, and the part of the condensate finally enters the drying layer 7. The setting of the flow channel 95 on the central pipe 9 can reduce the amount of condensate and reduce the burden of the drying layer 7.

[0094] Working principle: by default, the tail end of the upper adsorption plate 312 and the lower adsorption plate 322 is higher than the head end (as shown in Figure 8 ), the gas port 23 is communicated with the raw material gas, the raw material gas is guided by the cross-arranged upper adsorption plate 312 and lower adsorption plate 322 to flow upwards along the Z-shaped path (as shown in Figure 8 , the gray arrow), compared with the conventional axial flow, the device plays a role in prolonging the adsorption path and improving the adsorption purification effect.

[0095] When the upper adsorption plate 312 and the lower adsorption plate 322 adsorb impurities, the tail end of the upper adsorption plate 312 and the lower adsorption plate 322 swings downwards, and then the upper adsorption plate 312 and the lower adsorption plate 322 are rotated to the tail end and the head end are flush, at this time, the upper adsorption plate 312 and the lower adsorption plate 322 form aFigure 9 parallel state.

[0096] In the parallel state, when the raw gas flows downward from the gas port 23, it will first flow along the upper surface of the upper adsorption plate 312 from the center to the periphery, and then flow along the upper surface of the lower adsorption plate 322 from the periphery to the center after being blocked at the periphery.

[0097] When the high-temperature raw gas is introduced, the inlet valve 21 is closed, so that the gas port 23 is closed, and the movable tube 13 is driven to rise by the electric telescopic rod 14 until the movable tube 13 is coupled and communicated with the central tube 9 (as shown in Figure 10 At this time, the protrusion at the bottom end of the central tube 9 pushes the blocking block 132, so that the blocking block 132 is misaligned with the inlet port 131 and no longer blocks the inlet port 131. The high-temperature raw gas flows upward from the through tube 16 into the bottom of the adsorption tower 1. The movable adsorption bed still maintains a horizontal state, that is, the upper adsorption plate 312 and the lower adsorption plate 322 are parallel to each other, and the high-temperature raw gas will flow along the path shown by the dashed line in Figure 10 .

[0098] Subsequently, the cooling gas is introduced again. The initial flow path of the cooling gas is consistent with that of the high-temperature raw gas, as shown by the dashed arrow in Figure 10 When condensation is generated 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, resulting in a downward swinging tendency of the tail end of the adsorption plate. The upper adsorption plate 312 and the lower adsorption plate 322 are rotated to be lower at the tail end than at the head end. At this time, the condensation in the upper adsorption plate 312 and the lower adsorption plate 322 will automatically flow and drop to the tail end of the adsorption plate under the influence of gravity.

[0099] The flow channel 95 located on the inner wall of the adsorption tower 1 will discharge the condensation into the bottom of the adsorption tower 1, and the condensation in this part will eventually enter the drying layer 7.

[0100] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is not doubted that those of ordinary skill in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present application. Therefore, the above figures and descriptions are illustrative in nature and should not be construed as limiting the scope of protection claimed by the present application.

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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