Multi-dryer alternative selective hydrogen purification system

Abstract

The invention relates to the technical field of hydrogen purification, in particular to a multi-dryer alternative selective hydrogen purification system, which comprises an impurity removal assembly, a gas-water separation component, a deoxidization piece connected with the gas-water separation component, and a hydrogen cooling piece connected with the deoxidization piece; a plurality of groups of drying assemblies are arranged, and each group of drying assembly comprises a regeneration cooling piece connected with the hydrogen cooling piece and a drying part connected with the regeneration cooling piece; and the switching assembly is arranged between the hydrogen cooling piece and the multiple sets of drying assemblies, different working states formed by the multiple sets of drying box bodies are utilized, so that different levels of operation is conducted on hydrogen purification, and the hydrogen purification efficiency and the purification yield are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen purification, and in particular to a multi-dryer alternating selective hydrogen purification system. BACKGROUND

[0002] In the existing hydrogen purification technology matched with water electrolysis, most of them adopt the processing mode of "single-stage drying + simple oxygen removal": the crude hydrogen gas is directly introduced into the drying device filled with silica gel for dehydration after being preliminarily removed by the ordinary filter screen, and the oxygen removal link only relies on the metal oxide adsorbent at room temperature to remove trace oxygen, and the drying device is mostly designed as a single unit, which needs to be replaced with adsorbent for regeneration at regular intervals, and cannot work continuously.

[0003] At the same time, in the prior art, the gas-liquid separation of crude hydrogen gas is only completed by a simple gravity settling tank, and the free water is not completely removed, which causes the subsequent deoxidizing adsorbent to be easily dampened and invalid; and the system does not set a special regeneration cooling link, and the drying adsorbent needs to be naturally cooled to room temperature before being re-used after replacement, which not only prolongs the downtime, but also causes the adsorption capacity to rapidly decrease due to the repeated cold and hot alternation of the adsorbent. SUMMARY

[0004] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the above problems existing in the prior art of the multi-dryer alternating selective hydrogen purification system, the present application is proposed.

[0006] Therefore, the purpose of the present application is to provide a multi-dryer alternating selective hydrogen purification system.

[0007] To solve the above technical problems, the present application provides the following technical scheme: a multi-dryer alternating selective hydrogen purification system, comprising: a removal component, including a gas-water separation part, a deoxidizing part connected with the gas-water separation part, and a hydrogen cooling part connected with the deoxidizing part; a drying component, the drying component is provided with a plurality of groups, each group of the drying component includes a regeneration cooling part connected with the hydrogen cooling part, and a drying part connected with the regeneration cooling part; a switching component, the switching component is arranged between the hydrogen cooling part and the plurality of drying components.

[0008] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the gas-water separation component comprises a gas-water separation tank connected with the hydrogen conveying pipeline and a water drain arranged at the bottom of the gas-water separation tank; the deoxidizing element comprises a palladium catalyst deoxidizer connected with the gas-water separation tank and a catalyst adding device arranged on the palladium catalyst deoxidizer; the hydrogen cooling element comprises a cooling condenser connected with the palladium catalyst deoxidizer, and an outer connecting bracket is arranged on the cooling condenser; the switching assembly and the drying assembly are arranged on the outer connecting bracket.

[0009] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the regeneration cooling element comprises a main switching pipeline connected with the switching assembly and a regeneration cooler connected with the main switching pipeline; the drying component comprises a drying box connected with the regeneration cooler and an adsorption dryer arranged in the drying box; a plurality of connecting ports are arranged on the drying box; gas conveying pipelines are connected with the drying box; the gas conveying pipelines are connected with a centralized discharge pipeline; a dust remover is arranged on the centralized discharge pipeline; and a buffer tank is arranged on the dust remover.

[0010] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the switching assembly comprises a first connecting valve arranged on the outer connecting bracket, a plurality of connecting pipelines arranged on the first connecting valve, and a gas detector arranged on the plurality of connecting pipelines; the plurality of connecting pipelines comprise a first connecting pipeline connected with the first connecting valve and a plurality of second connecting pipelines connected with the first connecting pipeline; each regeneration cooler is arranged on a second connecting pipeline; and a switching component is arranged on the outer connecting bracket.

[0011] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the switching component comprises a main plate connected with the plurality of connecting pipelines, a first telescopic rod arranged on the main plate, a first replacement ring arranged on the first telescopic rod, a connecting cylinder rotatably connected with the first replacement ring, and a replacement sector plate extending from the connecting cylinder; a gear is arranged on the side wall of the replacement sector plate; a first locking gear is engaged with the replacement sector plate; a first rotating gear is engaged with the first locking gear; and the first rotating gear is connected with the lower end of the adsorption dryer.

[0012] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the first telescopic rod is provided with a second replacement ring coaxially arranged with the first replacement ring, a connecting barrel is rotationally connected in the second replacement ring, a driving barrel is arranged in the connecting barrel, an arc-shaped slot is arranged on the driving barrel, a replacement sector plate is arranged on the connecting barrel, a second locking gear is engaged on the replacement sector plate on the connecting barrel, a second rotation gear is engaged on the second locking gear, and the second rotation gear is connected with another adsorption dryer.

[0013] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the arc-shaped slot is arranged in a ring shape on the driving barrel and ascends, a clamping strip matched with the arc-shaped slot is arranged on the connecting barrel at the second replacement ring, an operating member is arranged at the upper end of the first telescopic rod, an operating rod is rotationally connected on the first telescopic rod, and a second telescopic rod is hingedly connected to the middle section of the operating rod.

[0014] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, a guide rod is rotationally connected on the central exhaust pipe and the second connecting pipe, a sealing ball is arranged at the lower end of the guide rod, a through hole is arranged on the sealing ball, and a motor for controlling the rotation of the guide rod is arranged on the central exhaust pipe and the second connecting pipe.

[0015] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, the operating member comprises a control baffle arranged on an outer connecting support, the control baffle is arranged in an arc shape, a horizontal slot and a plurality of vertical slots are arranged on the control baffle, the plurality of vertical slots are equidistantly arranged on the control baffle and are in communication with the horizontal slot, a tray is arranged on the outer connecting support, a bent track is arranged on the tray, a plurality of outer teeth are arranged on the bent track, a moving gear is slidably arranged on the tray, the moving gear is always engaged with the plurality of outer teeth, a stepping motor is arranged on the moving gear, an outer frame is arranged on the stepping motor, a driving cylinder connected with the operating rod is arranged at the upper end of the outer frame, and the upper end of the driving cylinder is hingedly connected with the operating rod.

[0016] As a preferred scheme of the multi-dryer alternating selective hydrogen purification system, an intermediate pipe is arranged on the outer connecting support, a telescopic end pipe is slidably connected on the connecting port, a top strip is slidably connected on the connecting port, and a cam abutting against the top strip is rotationally connected on the connecting port.

[0017] The beneficial effects of the present application: when the first working state runs for 24 hours, the switching assembly automatically controls each drying assembly to switch to the second working state (group B performs the main drying work, group C performs the regeneration work, and group A performs the adsorption work), wherein the drying box body in group A and the drying box body in group B need to be controlled to rotate to connect with each other to form different working states, complete a complete cycle period, and ensure that the molecular sieve adsorption capacity of each drying assembly is fully recovered, thereby maintaining the stable drying effect of the system.

[0018] Different working states are formed by using multiple drying box bodies, so that different levels of operation are performed on the purification of hydrogen, thereby increasing the efficiency and yield of hydrogen purification. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor. Among them:

[0020] Figure 1 It is a schematic diagram of the overall structure of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0021] Figure 2 It is a schematic diagram of the overall structure of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0022] Figure 3 It is a schematic diagram of the upper structure of the external connecting support of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0023] Figure 4 It is a schematic diagram of the switching component of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0024] Figure 5 It is a schematic diagram of the bottom of the switching component of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0025] Figure 6 It is a schematic diagram of the control baffle of the switching component of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0026] Figure 7 It is a schematic diagram of the drying box body of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0027] Figure 8 It is a schematic diagram of the drying box body of the multiple-dryer alternating selective hydrogen purification system of the present application. Figure 7

[0028] ​Figure 9 The rear view schematic diagram of the switching component of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0029] Figure 10 The upper structure schematic diagram of the connecting port of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0030] Figure 11 The driving cylinder structure schematic diagram of the multiple-dryer alternating selective hydrogen purification system of the present application.

[0031] The figure mark explanation: 100, impurity removing assembly; 101, gas-water separation component; 102, deoxidizing piece; 103, hydrogen cooling piece; 200, drying assembly; 201, regeneration cooling piece; 202, drying component; 1011, gas-water separation tank body; 1012, water drainer; 1021, palladium catalyst deoxidizer; 1022, catalyst adder; 1031, cooling condenser; 1032, outer connecting support; 2011, main switching pipeline; 2012, regeneration cooler; 2022, adsorption dryer; 2021, drying box body; 20211, connecting port; 2023, gas sending pipeline; 2024, centralized discharge pipe; 2025, dust remover; 2026, buffer tank body; 300, switching assembly; 301, first connecting valve body; 302, multiple connecting pipeline; 3021, first connecting pipe; 3022, second connecting pipe; 400, switching component; 4001, main body plate piece; 401, first telescopic rod; 402, first replacement ring; 403, connecting cylinder; 404, replacement sector plate; 405, gear tooth; 406, first locking gear; 407, first rotating gear; 500, second replacement ring; 501, driving cylinder; 502, arc-shaped groove; 503, second locking gear; 504, second rotating gear; 505, clamping strip; 507, operating rod; 508, second telescopic rod; 600, operating piece; 601, control baffle; 602, transverse groove; 603, longitudinal groove; 604, tray; 605, bent track; 6051, outer tooth; 606, moving gear; 607, stepping motor; 608, driving cylinder; 700, intermediate pipe; 701, telescopic end pipe; 702, top strip; 703, cam; 704, guide rod; 705, sealing ball; 706, through hole. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings of the specification.

[0033] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0034] Second, the "one embodiment" or "an embodiment" appearing in the specification herein indicates that a specific feature, structure, or characteristic can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification herein does not all refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments.

[0035] Third, the present application is described in detail in conjunction with the schematic diagrams. In the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of illustration, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width, and depth should be included in actual production.

[0036] Reference Figures 1-11 For the first embodiment of the present application, a multi-dryer alternating selective hydrogen purification system is provided, which comprises a removal component 100. The removal component 100 is used as a pretreatment structure for hydrogen purification, for removing free water, impurity oxygen, and part of heat in the raw hydrogen. The removal component 100 comprises a gas-water separation part 101, a deoxidizing part 102, and a hydrogen cooling part 103, which are connected in series to form a complete pretreatment process.

[0037] Further, in the present embodiment, the gas-water separation part 101 comprises a gas-water separation tank 1011 made of stainless steel, which is internally provided with a baffle-type demisting plate for enhancing the gas-liquid separation effect. The gas-water separation tank 1011 is connected to the hydrogen outlet pipeline of the water electrolysis hydrogen production device through a flange at the gas inlet, and is connected to the deoxidizing part 102 through a seamless steel pipe at the gas outlet.

[0038] Further, a water drainer 1012 is arranged at the bottom of the gas-water separation tank 1011. The water drainer 1012 adopts an automatic floating ball structure. When the free water in the tank reaches the set liquid level, the floating ball floats up, so that the water drainer 1012 is opened to drain the accumulated water, and thus the free water in the tank can be removed by the water drainer 1012.

[0039] Further, in the embodiment, the deoxidizer 102 comprises a palladium catalyst deoxidizer 1021 and a catalyst adding device 1022 connected to the gas-water separation tank 1011, the palladium catalyst deoxidizer 1021 is filled with palladium-platinum composite catalyst, the height of the internal catalyst layer is 3:1 of the diameter of the tank of the palladium catalyst deoxidizer 1021, so as to ensure that the raw hydrogen is in sufficient contact with the palladium-platinum composite catalyst, the catalyst adding device 1022 is connected to the top of the palladium catalyst deoxidizer 1021 through a flange, a filter screen is arranged at the connection between the catalyst adding device 1022 and the palladium catalyst deoxidizer 1021, the gas outlet of the palladium catalyst deoxidizer 1021 is connected to the gas outlet of the gas-water separation tank 1011, and the gas outlet is connected to the hydrogen cooling device 103 through a pipeline.

[0040] Further, in the embodiment, the hydrogen cooling device 103 comprises a cooling condenser 1031 and an external connecting bracket 1032 connected to the palladium catalyst deoxidizer 1021, the cooling condenser 1031 adopts a shell-and-tube structure, the gas inlet of the cooling condenser 1031 is connected to the gas outlet of the palladium catalyst deoxidizer 1021, and the external connecting bracket 1032 is mainly used for fixing the cooling condenser 1031 and installing other structures, the external connecting bracket 1032 is welded by a plurality of shaped steels to form a rectangular frame shape, and the operator sets the switching assembly 300 and the drying assembly 200 on the external connecting bracket 1032.

[0041] Further, the application further comprises a drying assembly 200, which is used for removing water in the hydrogen and achieving complete drying of the hydrogen, in the embodiment, the drying assembly 200 is provided in three groups, each group of the drying assembly 200 comprises a regenerative cooling device 201 and a drying component 202 connected to the hydrogen cooling device 103, and the three groups of the drying assembly 200 are arranged on the external connecting bracket 1032.

[0042] Further, in the embodiment, the regenerative cooling device 201 comprises a main switching pipeline 2011 connected to the switching assembly 300 and a regenerative cooler 2012 connected to the main switching pipeline 2011, the regenerative hydrogen to be cooled is introduced into the regenerative cooler 2012, and then cooling water is introduced to perform heat exchange cooling, the gas inlet of the regenerative cooler 2012 is connected to the switching assembly 300 through a pipeline, the gas outlet is connected to the drying component 202, and a flow regulating valve is arranged on the regenerative cooler 2012 to control the flow of the regenerative hydrogen.

[0043] In the embodiment, the drying component 202 comprises a drying box 2021 connected with the regenerative cooler 2012 and an adsorption dryer 2022 arranged in the drying box 2021, wherein the drying box 2021 is a cylindrical pressure container, the drying box 2021 is filled with molecular sieve, the height of the molecular sieve layer is two-thirds of the height of the drying box 2021, the top of the drying box 2021 is connected with the gas outlet of the regenerative cooler 2012, a plurality of drying through holes are arranged on the drying box 2021, and a gas delivery pipeline 2023 is arranged on the drying box 2021, and the plurality of gas delivery pipelines 2023 are connected to a centralized exhaust pipe 2024.

[0044] Preferably, the gas delivery pipelines 2023 of the drying boxes 2021 in the three groups of drying components 202 are connected to the centralized exhaust pipe 2024, and a dust remover 2025 and a buffer tank 2026 are arranged at the end of the centralized exhaust pipe 2024 away from the drying box 2021, and the dust remover 2025 is used to remove the molecular sieve dust in the hydrogen.

[0045] Further, the switching assembly 300 is used to control the flow direction of the hydrogen among the different drying assemblies 200, so as to realize the alternate work, regeneration and adsorption of the drying assemblies 200. In the embodiment, the switching assembly 300 comprises a first connection valve body 301 arranged on the outer connection support 1032, a plurality of connection pipelines 302 arranged on the first connection valve body 301, and a gas detector arranged on the plurality of connection pipelines 302.

[0046] Preferably, the first connection valve body 301 is a pneumatic three-way ball valve, which has three interfaces, namely an inlet, a first outlet and a second outlet, the inlet is connected with the cooling condenser 1031, the first outlet and the second outlet are connected with the plurality of connection pipelines 302 respectively, a pneumatic actuator is arranged on the first connection valve body 301, the pneumatic actuator is electrically controlled and can be controlled by an operator to switch the valve and realize the rapid adjustment of the hydrogen flow direction, and the gas detector is mainly used to detect the gas passing through the first connection valve body 301, and mainly detects the gas pressure in the plurality of connection pipelines 302.

[0047] Preferably, in the embodiment, the plurality of connection pipelines 302 comprise a first connection pipeline 3021 connected with the first connection valve body 301, a joint and a plurality of second connection pipelines 3022, the first connection pipeline 3021 is a stainless steel seamless steel pipe, one end of which is connected with the outlet of the first connection valve body 301, the joint has a multi-way structure and is provided with three outlets connected with the three second connection pipelines 3022 respectively, a gas detector is arranged on each second connection pipeline 3022 for monitoring the hydrogen flow and purity of each pipeline, so as to ensure the stability of the gas parameters in the switching process, the regenerative cooler 2012 is arranged at the middle section of the second connection pipeline 3022, and a stop valve is arranged on each second connection pipeline 3022 for facilitating the individual maintenance of any one group of drying assemblies 200.

[0048] Further, the switching component 400 is arranged on the outer connecting support 1032, in the embodiment, the switching component 400 comprises a main plate 4001 arranged on the outer connecting support 1032, a first telescopic rod 401 arranged on the main plate 4001, a first replacement ring 402 arranged on the first telescopic rod 401, a connecting barrel 403 rotatably connected to the first replacement ring 402, the first telescopic rod 401 is arranged in a vertical direction, the outer diameter of the connecting barrel 403 is matched with the inner diameter of the first replacement ring 402, a replacement fan plate 404 is arranged on the connecting barrel 403, the replacement fan plate 404 is arranged in a horizontal direction, a gear 405 is arranged on the outermost arc side of the replacement fan plate 404, a first locking gear 406 is arranged on the outer connecting support 1032, the first locking gear 406 is also arranged in a horizontal direction, and the rotation of the replacement fan plate 404 drives the rotation of the first locking gear 406.

[0049] Further, the second replacement ring 500 is arranged on the first telescopic rod 401, the second replacement ring 500 is coaxially arranged with the first replacement ring 402, and the second replacement ring 500 is arranged in alignment with the first replacement ring 402, the connecting barrel 403 is rotatably connected in the second replacement ring 500, the rotation plane of the connecting barrel 403 is arranged vertically, and the driving barrel 501 is arranged in the connecting barrel 403, the driving barrel 501 is sleeved with the connecting barrel 403, the rotation of the driving barrel 501 can drive the rotation of the connecting barrel 403, the replacement fan plate 404 is arranged on the connecting barrel 403, and the second locking gear 503 is engaged with the replacement fan plate 404 on the connecting barrel 403, the second locking gear 503 is also arranged on the outer connecting support 1032.

[0050] As preferred, the first rotating gear 407 engaged with the first locking gear 406 is arranged at the lower end of one of the drying box bodies 2021, and the second rotating gear 504 engaged with the second locking gear 503 is arranged at the lower end of the adjacent drying box body 2021, and the rotation of the first rotating gear 407 and the second rotating gear 504 can respectively drive the rotation of the two drying box bodies 2021.

[0051] Further, the driving barrel 501 is sleeved with the end of the first telescopic rod 401, the arc-shaped groove 502 is arranged on the driving barrel 501, the arc-shaped groove 502 is arranged in a ring shape along the driving barrel 501, the clamping strip 505 matched with the arc-shaped groove 502 is arranged on the connecting barrel 403 at the second replacement ring 500, and the arc-shaped groove 502 is arranged on the driving barrel 501 in a ring shape, so that when the first telescopic rod 401 slides, the driving barrel 501 is rotated in a vertical plane by the cooperation of the clamping strip 505 and the arc-shaped groove 502, thereby driving the rotation of the replacement fan plate 404 and the second locking gear 503.

[0052] The operating rod 507 is rotatably connected to the first telescopic rod 401, and the second telescopic rod 508 is hingedly connected to the middle section of the operating rod 507, and the second telescopic rod 508 is also arranged in the horizontal direction, and the end of the second telescopic rod 508 is connected to the connecting cylinder 403, and the purpose of arranging the second telescopic rod 508 is to fix the position of the connecting cylinder 403.

[0053] Further, the operating member 600 is arranged at the upper end of the first telescopic rod 401, and in the embodiment, the operating member 600 includes the control baffle 601 arranged on the outer connecting support 1032, the control baffle 601 is arranged in an arc shape, the horizontal slot 602 and a plurality of vertical slots 603 are arranged on the control baffle 601, the vertical slots 603 are equidistantly arranged on the control baffle 601 and are in communication with the horizontal slot 602, the operating rod 507 passes through the horizontal slot 602, the tray 604 is arranged on the outer connecting support 1032, the bent track 605 is arranged on the tray 604, a plurality of outer teeth 6051 are arranged on the bent track 605, the moving gear 606 is slidably arranged on the tray 604, the moving gear 606 is always in engagement with the plurality of outer teeth 6051, and the stepping motor 607 is arranged on the moving gear 606, the stepping motor 607 drives the rotation of the moving gear 606, and at the same time, the outer frame is arranged on the stepping motor 607, the drive air cylinder 608 connected to the operating rod 507 is arranged at the upper end of the outer frame, and the upper end of the drive air cylinder 608 is hingedly connected to the operating rod 507.

[0054] The hydrogen gas collecting tank is directly connected to the dust collector 2025, and the pump body is arranged between the dust collector 2025 and the hydrogen gas collecting tank.

[0055] Further, a plurality of connecting ports 20211 are arranged on each drying box body 2021, the telescopic end pipe 701 is slidably connected to each connecting port 20211, the intermediate pipe 700 is arranged on the outer connecting support 1032, the telescopic end pipe 701 is slidably connected to the connecting port 20211, the top strip 702 is slidably connected to the connecting port 20211, the cam 703 abutting against the top strip 702 is rotatably connected to the connecting port 20211, the cam 703 is driven by the motor, the elastic pull strip is arranged between the top strip 702 and the connecting port 20211, the elastic pull strip always pulls the top strip 702 to move in the direction of the cam 703, the rotation of the cam 703 drives the forward and backward sliding of the top strip 702, and further drives the forward and backward sliding of the telescopic end pipe 701, so that the telescopic end pipe 701 is connected to the adjacent drying box body 2021.

[0056] Further, a guide rod 704 is rotatably connected to the central exhaust pipe 2024 and the second connecting pipe 3022, a sealing ball 705 is arranged at the lower end of the guide rod 704, a through hole 706 is arranged on the sealing ball 705, and a motor for controlling the rotation of the guide rod 704 is arranged on the central exhaust pipe 2024 and the second connecting pipe 3022.

[0057] Operation process: The raw hydrogen first enters the gas-water separation tank 1011 of the gas-water separation component 101, under the action of the baffle demister, the free water in the hydrogen is intercepted and flows into the drain 1012 at the bottom of the tank wall to realize gas-liquid separation, then the hydrogen enters the palladium catalyst deoxidizer 1021 of the deoxidizing component 102, under the catalytic action of the palladium platinum catalyst, the impurity oxygen in the hydrogen reacts with the hydrogen to reduce the oxygen content in the hydrogen, and the reacted hydrogen carries the generated water vapor into the cooling condenser 1031 of the hydrogen cooling component 103, under the cooling action of the pipe cooling water, the water vapor is condensed into liquid water and discharged through the drain valve at the bottom of the cooling condenser 1031.

[0058] The three groups of drying assemblies 200 are controlled by the switching assembly 300 and alternately in the "working", "regeneration" and "adsorption" states, each switching cycle is 24 hours, and the continuous operation of the system is ensured. Taking the first working state (in which the three groups of drying assemblies 200 are divided into three groups of A, B and C, the group A performs the main drying work, the group B performs the regeneration work, and the group C performs the adsorption work) as an example, the specific working process is as follows:

[0059] The drying assembly 200 of the group A (working state): the switching assembly 300 controls the first connecting valve 301 to introduce the cooled hydrogen into the regeneration cooler 2012 of the group A, the hydrogen is further cooled in the regeneration cooler 2012 and then enters the adsorption dryer 2022 in the drying box 2021 of the group A, the adsorption dryer 2022 adsorbs the moisture, the dried hydrogen flows out from the gas outlet of the drying box 2021 of the group A, enters the central exhaust pipe 2024 through the gas delivery pipe 2023, most of the hydrogen is sent to the subsequent process as product hydrogen, then the sealing ball 705 is used to close the central exhaust pipe 2024, then the switching component 400 is used to rotate the drying box 2021, and then a small part of the hydrogen in the drying box 2021 is divided into the drying assembly 200 of the group B as regeneration gas.

[0060] When the drying assembly 200 is sent to the B group, the operator drives the cylinder 608 to drive the operating rod 507 in a linear direction, so that the operating rod 507 drives the first telescopic rod 401 to slide, so that the driving cylinder 501 outside the first telescopic rod 401 slides together, and when sliding, the clamping strip 505 moves in the arc-shaped slot 502, so that the moving path of the clamping strip 505 is forward rotation or backward rotation, so as to drive the connecting cylinder 403 located in the second replacement ring 500 to rotate, so that the linear displacement of the first telescopic rod 401 becomes the rotation of the connecting cylinder 403, thereby driving the rotation of the second locking gear 503, and then driving the rotation of the second rotating gear 504, so that the drying box body 2021 of the A group rotates to be connected with the drying box body 2021 of the B group.

[0061] The regenerated gas (dry hydrogen) branched from the A group enters the adsorption dryer 2022 of the B group, and the electric heater in the adsorption dryer 2022 of the B group is started to raise the temperature in the dryer to 200-230°C, so that the water adsorbed by the molecular sieve is desorbed at high temperature. The regenerated gas after desorption enters the regenerative cooler 2012 of the B group, and the desorbed water vapor is condensed into liquid water under the cooling action of the cooling water and is discharged through a drain valve. When the temperature at the top of the adsorption dryer 2022 in the drying box body 2021 of the B group reaches a limited temperature, the cooling blowing stage is entered, the electric heater in the adsorption dryer 2022 is turned off, and the regenerated gas continues to be introduced to take away the heat in the dryer.

[0062] Then the regenerated gas flowing out of the regenerative cooler 2012 of the B group enters the adsorption dryer 2022 of the C group. The operator controls the rotation of the stepping motor 607 to drive the rotation of the connecting cylinder 403 in the first replacement ring 402 by the rotation of the first telescopic rod 401, thereby driving the rotation of the replacement fan plate 404, and then driving the rotation of the first locking gear 406, thereby driving the rotation of the first rotating gear 407, and then making the drying box body 2021 of the B group rotate, so that the drying box body 2021 of the B group is connected with the drying box body 2021 of the C group. At this time, the heater in the adsorption dryer 2022 of the C group does not work, and a small amount of water in the regenerated gas is adsorbed by the molecular sieve of the C group, so as to further purify the regenerated gas. The adsorbed regenerated gas returns to the gas inlet of the gas-water separation component 101 to re-enter the purification process, so as to realize the recycling of the regenerated gas (refer to Figure 2 The arrow direction shown in the middle figure is the gas flow direction).

[0063] When the first working state runs for 24 hours, the switching assembly 300 automatically controls each drying assembly 200 to switch to the second working state (the B group performs the main drying work, the C group performs the regeneration work, and the A group performs the adsorption work), wherein, the drying box bodies 2021 in the A group and the drying box bodies 2021 in the B group need to be controlled to rotate, so as to be connected with each other to adapt to the collective working state, complete a complete cycle period, and ensure that the molecular sieve adsorption capacity of each drying assembly 200 is fully recovered, thereby maintaining the stable drying effect of the system.

[0064] Different working states are formed by using the multiple drying box bodies 2021, so that different levels of operations are performed on the purification of hydrogen, thereby increasing the efficiency and product rate of hydrogen purification.

[0065] Importantly, it should be noted that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in the application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of discrete elements or positions can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the application. The order or sequence of any process or method steps can be changed or re-sequenced without departing from the generality of the application. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functions and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims. Accordingly, the application is not limited to the particular embodiments described and illustrated herein, but extends to all structures that fall within the scope of the appended claims.

[0066] Furthermore, in an effort to provide a concise description of exemplary embodiments, all features of an actual implementation can not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the application, or those unrelated to enabling the claimed application).

[0067] It should be understood that numerous specific implementations can be made within the scope of the present application without departing from the spirit of the application. For example, although specific configurations of the various components have been described, other configurations of the components, including the division of the components between systems or devices, can be used. Moreover, certain terminology has been used to describe embodiments of the application.

[0068] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the protection scope of the present application.

Claims

1. A multi-dryer alternating selective hydrogen purification system, characterized by: The application relates to a hydrogen purification device. The hydrogen purification device comprises a purifying assembly (100), a drying assembly (200) and a switching assembly (300). The purifying assembly (100) comprises a gas-water separation component (101), a deoxidizing element (102) connected with the gas-water separation component (101) and a hydrogen cooling element (103) connected with the deoxidizing element (102). The gas-water separation component (101) comprises a gas-water separation tank (1011) connected with a hydrogen conveying pipeline and a water drain (1012) arranged at the bottom of the gas-water separation tank (1011).

2. The multiple dryer alternating selective hydrogen purification system of claim 1, wherein: The deoxidizing element (102) comprises a palladium catalyst deoxidizer (1021) connected with the gas-water separation tank (1011), a catalyst adder (1022) arranged on the palladium catalyst deoxidizer (1021).

3. The multiple dryer alternating selective hydrogen purification system of claim 2, wherein: The hydrogen cooling element (103) comprises a cooling condenser (1031) connected with the palladium catalyst deoxidizer (1021), and an outer connecting support (1032) is arranged on the cooling condenser (1031).

4. The multiple dryer alternating selective hydrogen purification system of claim 3, wherein: The switching assembly (300) and the drying assembly (200) are arranged on the outer connecting support (1032). The drying assembly (200) comprises a regenerative cooling element (201) connected with the switching assembly (300) and a drying component (202) connected with the regenerative cooling element (201). The regenerative cooling element (201) comprises a main switching pipeline (2011) connected with the switching assembly (300) and a regenerative cooler (2012) connected with the main switching pipeline (2011). The drying component (202) comprises a drying box (2021) connected with the regenerative cooler (2012) and an adsorption dryer (2022) arranged in the drying box (2021). The drying box (2021) is provided with a plurality of connecting ports (20211), and a gas delivery pipeline (2023) is connected to the drying box (2021). The gas delivery pipeline (2023) is connected to a centralized exhaust pipeline (2024), and a dust remover (2025) is arranged on the centralized exhaust pipeline (2024). The dust remover (2025) is provided with a buffer tank (2026). The switching assembly (300) comprises a first connecting valve (301) arranged on the outer connecting support (1032), a plurality of connecting pipelines (302) arranged on the first connecting valve (301) and a gas detector arranged on the connecting pipelines (302). The plurality of connecting pipelines (302) comprise a first connecting pipeline (3021) connected with the first connecting valve (301) and a plurality of second connecting pipelines (3022) connected with the first connecting pipeline (3021). Each regenerative cooler (2012) is arranged on the second connecting pipeline (3022). The outer connecting support (1032) is provided with a switching component (400).

5. The multiple dryer alternating selective hydrogen purification system of claim 4, wherein: The switching component (400) comprises a main plate (4001) connected with the multi-connection pipeline (302), a first telescopic rod (401) arranged on the main plate (4001), a first replacement ring (402) arranged on the first telescopic rod (401), a connecting cylinder (403) rotatably connected with the first replacement ring (402), and a replacement fan plate (404) extending from the connecting cylinder (403), wherein a gear (405) is arranged on the side wall of the replacement fan plate (404), the replacement fan plate (404) is engaged with a first locking gear (406), the first locking gear (406) is engaged with a first rotating gear (407), and the first rotating gear (407) is connected with the lower end of the adsorption dryer (2022).

6. The multiple dryer alternating selective hydrogen purification system of claim 5, wherein: The first telescopic rod (401) is provided with a second replacement ring (500), the second replacement ring (500) is coaxially arranged with the first replacement ring (402), the connecting cylinder (403) is also rotatably connected in the second replacement ring (500), a driving cylinder (501) is arranged in the connecting cylinder (403), an arc-shaped groove (502) is arranged on the driving cylinder (501), the connecting cylinder (403) is also provided with a replacement fan plate (404), the replacement fan plate (404) on the connecting cylinder (403) is engaged with a second locking gear (503), the second locking gear (503) is engaged with a second rotating gear (504), and the second rotating gear (504) is connected with another adsorption dryer (2022).

7. The multiple dryer alternating selective hydrogen purification system of claim 6, wherein: The arc-shaped groove (502) rises along the driving cylinder (501), the connecting cylinder (403) at the second replacement ring (500) is provided with a clamping strip (505) matched with the arc-shaped groove (502), the upper end of the first telescopic rod (401) is provided with an operating member (600), the first telescopic rod (401) is rotatably connected with an operating rod (507), and the middle segment of the operating rod (507) is hingedly connected with a second telescopic rod (508).

8. The multiple dryer alternating selective hydrogen purification system of claim 4, wherein: The centralized discharge pipe (2024) and the second connecting pipe (3022) are rotatably connected with a guide rod (704), the guide rod (704) extends into the lower end and is provided with a sealing ball (705), the sealing ball (705) is provided with a through hole (706), and the centralized discharge pipe (2024) and the second connecting pipe (3022) are provided with a motor for controlling the rotation of the guide rod (704).

9. The multiple dryer alternating selective hydrogen purification system of claim 7, wherein: The operating part (600) comprises a control baffle (601) arranged on the outer connecting support (1032), the control baffle (601) is arranged in an arc shape, a horizontal groove (602) and a plurality of vertical grooves (603) are arranged on the control baffle (601), the plurality of vertical grooves (603) are equidistantly arranged on the control baffle (601) and are in communication with the horizontal groove (602), a tray (604) is arranged on the outer connecting support (1032), a bent track (605) is arranged on the tray (604), a plurality of outer teeth (6051) are arranged on the bent track (605), a moving gear (606) is slidably arranged on the tray (604), the moving gear (606) is always engaged with the plurality of outer teeth (6051), a stepping motor (607) is arranged on the moving gear (606), an outer frame is arranged on the stepping motor (607), a driving cylinder (608) connected with the operating rod (507) is arranged on the outer frame, and the upper end of the driving cylinder (608) is hingedly connected with the operating rod (507).

10. The multiple dryer alternating selective hydrogen purification system of claim 3, wherein: An intermediate pipe (700) is arranged on the outer connecting support (1032), a telescopic end pipe (701) is slidably connected to the connecting port (20211), a top strip (702) is slidably connected to the connecting port (20211), and a cam (703) abutting against the top strip (702) is rotatably connected to the connecting port (20211).

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