Hydrogen pressure swing adsorption purification rotary valve with filtering structure

Abstract

The utility model relates to the technical field of purification rotary valves, and discloses a hydrogen pressure swing adsorption purification rotary valve with a filtering structure, which comprises a rotary valve body, the outer wall of the rotary valve body is fixedly connected with two connecting flanges, one connecting flange is fixedly connected with a filtering pipe, and the other connecting flange is fixedly connected with a pipeline. The inner wall of the end of the filter pipe is fixedly connected with a moisture absorption plate, a filter assembly is arranged in the filter pipe and used for filtering hydrogen, and a sealing assembly is arranged in the filter pipe. The hydrogen pressure swing adsorption purification rotary valve disclosed by the utility model effectively solves the problems that solid particles, oil mist or water easily and directly enter an adsorption tower to pollute or block an adsorbent, so that the adsorption effect is reduced and the service life of the adsorbent is shortened, and achieves the effects of efficiently filtering, effectively filtering hydrogen and improving the purification efficiency. And the gas entering the adsorption bed is ensured to be clean, so that the purity of hydrogen is improved.

Description

Technical Field

[0001] This utility model relates to the field of purification rotary valve technology, specifically to a hydrogen pressure swing adsorption purification rotary valve with a filter structure. Background Technology

[0002] The rotary valve in a hydrogen pressure swing adsorption (PSA) purification system is a key component. It primarily switches the gas flow between different adsorption beds, controlling the alternation of adsorption and desorption processes to achieve hydrogen separation and purification. Through efficient gas flow switching, the rotary valve ensures continuous operation across multiple adsorption towers, guaranteeing high hydrogen purity. Since hydrogen may carry impurities such as solid particles and oil mist as it flows through the rotary valve and adsorption towers, these impurities can damage the adsorbent or affect the normal operation of the rotary valve. Therefore, a design with a filter structure is necessary in the rotary valve. The filter structure effectively removes these impurities, preventing them from entering the rotary valve and adsorption system, avoiding system blockage, reduced hydrogen purity, or shortened equipment lifespan, thereby improving the efficiency and reliability of the PSA system.

[0003] Traditional hydrogen pressure swing adsorption (PSA) purification rotary valves achieve alternating adsorption and desorption processes by switching gas flow between multiple adsorption beds. In hydrogen PSA systems, rotary valves typically use mechanical rotation or electric actuation to control the gas flow from one adsorption tower to another. The basic principle is to adjust the gas pressure so that the adsorbent in the adsorption beds adsorbs impurity gases under high pressure and releases hydrogen under low pressure. The rotary valve, through precise gas flow switching, ensures that each adsorption bed operates alternately under different pressure conditions, guaranteeing continuous system operation and high hydrogen purity. Traditional rotary valve designs usually include multiple sealed channels and valves to ensure that gas leakage or mixing does not occur during switching, thus effectively maintaining the system's high efficiency and stability.

[0004] Traditional rotary valve designs for hydrogen pressure swing adsorption purification mainly focus on fluid switching functions. Their internal structure typically includes multiple sealed channels and valve seats, making it difficult to filter hydrogen. This allows solid particles, oil mist, or moisture to easily enter the adsorption tower, contaminating or clogging the adsorbent, thereby reducing adsorption efficiency and shortening the adsorbent's lifespan. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hydrogen pressure swing adsorption purification rotary valve with a filtration structure. It aims to improve the problem that traditional hydrogen pressure swing adsorption purification rotary valves are unable to filter hydrogen, which allows solid particles, oil mist, or moisture to easily enter the adsorption tower, causing pollution or blockage of the adsorbent, thereby reducing the adsorption effect and shortening the service life of the adsorbent.

[0006] To achieve the above objectives, this utility model provides a hydrogen pressure swing adsorption purification rotary valve with a filtration structure, comprising a rotary valve body, two connecting flanges fixedly disposed on the outer side wall of the rotary valve body, one of which is fixedly connected to a filter tube, and the other of which is fixedly connected to a pipe, a moisture-absorbing plate being fixedly connected to the interior of the filter tube at the end away from the rotary valve body, and a filter assembly for filtering hydrogen being disposed inside the filter tube; the filter assembly includes a coarse filter plate, a fine filter plate, and an activated carbon filter plate, which are arranged sequentially from left to right inside the connecting flange, and a flow divider is disposed between the coarse filter plate and the fine filter plate.

[0007] Furthermore, the filter tube is also provided with a sealing assembly for preventing hydrogen leakage. The sealing assembly includes a sealing frame, which is slidably disposed inside the filter tube. The outer walls of the coarse filter plate, the diverter plate, the fine filter plate, and the activated carbon filter plate are all fixedly connected to the inner wall of the sealing frame. A sealing ring is fixedly connected to the outer wall of the sealing frame.

[0008] Furthermore, the outer wall of the sealing ring is attached to the inner wall of the filter tube, and the sealing ring is used to seal the filter tube and the sealing frame.

[0009] Furthermore, a hinge is fixedly connected to one side of the filter tube, and a sealing cap is fixedly connected to the outer wall of the hinge. A connecting block is fixedly connected to one end of the sealing cap and the other end of the filter tube. A rotating shaft is rotatably connected inside one of the connecting blocks. A limiting component for limiting the rotation of the rotating shaft is provided on the upper part of the rotating shaft. A handle is fixedly connected to the top of the rotating shaft. A locking block is fixedly connected to the bottom of the rotating shaft. A torsion spring is sleeved on the lower part of the rotating shaft.

[0010] Furthermore, the limiting component includes a limiting ring fixedly disposed on the upper part of the rotating shaft, the limiting ring being slidably disposed in a groove inside the connecting block, the groove being used to limit the rotation of the limiting ring.

[0011] Furthermore, the locking block is disposed inside the connecting block, and the locking block is used to connect and fix the two connecting blocks.

[0012] Furthermore, one end of the torsion spring is fixedly connected inside the connecting block, and the torsion spring is used to drive the rotating shaft to rotate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) In the hydrogen pressure swing adsorption purification rotary valve of this utility model, the rotary valve body is first started to transport hydrogen with the connecting flange, filter tube and pipeline. During this process, moisture is absorbed by the moisture absorption plate, and then the flow is divided by the flow divider plate. Finally, it is filtered efficiently with the coarse filter plate, fine filter plate and activated carbon filter plate. During this process, the sealing frame and sealing ring are used to seal and prevent leakage. This solves the problem that solid particles, oil mist or moisture can easily enter the adsorption tower directly, causing pollution or blockage of the adsorbent, thereby reducing the adsorption effect and shortening the service life of the adsorbent. It achieves efficient filtration and can effectively filter hydrogen to ensure that the gas entering the adsorption bed is clean, thereby improving the purity of hydrogen.

[0015] (2) In the hydrogen pressure swing adsorption purification rotary valve of this utility model, the drive handle first drives the rotating shaft to rotate, and then the limiting ring, the sliding groove and the torsion spring drive the locking block to rotate 90 degrees inside the connecting block. Then, the sealing cover and the hinge facilitate the removal of the internal coarse filter plate, the diverter plate, the fine filter plate and the activated carbon filter plate for cleaning. The filter structure can be disassembled and cleaned regularly to effectively remove accumulated impurities, avoid loss of performance due to blockage and extend its service life.

[0016] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a three-dimensional structural diagram of a rotary valve for hydrogen pressure swing adsorption purification with a filtration structure proposed in this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the filter tube of a rotary valve for hydrogen pressure swing adsorption purification with a filtration structure proposed in this utility model.

[0020] Figure 3 A schematic diagram of the structure below the sealing cover of a rotary valve for hydrogen pressure swing adsorption purification with a filtration structure proposed in this utility model.

[0021] Figure 4 A schematic diagram of the internal structure of the connecting block of a rotary valve for hydrogen pressure swing adsorption purification with a filtration structure proposed in this utility model.

[0022] The components are as follows: 1-rotary valve body; 2-connecting flange; 3-filter pipe; 4-moisture-absorbing plate; 5-sealing frame; 6-coarse filter plate; 7-diverter plate; 8-fine filter plate; 9-activated carbon filter plate; 10-sealing ring; 11-pipe; 12-sealing cover; 13-hinge; 14-connecting block; 15-rotating shaft; 16-locking block; 17-torsion spring; 18-limiting ring; 19-handle; 20-slide groove. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0024] Please see Figures 1 to 3 This utility model provides a hydrogen pressure swing adsorption purification rotary valve with a filtration structure, including a rotary valve body 1. Two connecting flanges 2 are symmetrically fixedly connected to the left and right sides of the outer side wall of the rotary valve body 1. One connecting flange 2 is fixedly connected to a filter tube 3, and the other connecting flange 2 is fixedly connected to a pipe 11. The two sides of the rotary valve body 1 are connected to the filter tube 3 and the pipe 11 respectively through the connecting flanges 2. A moisture-absorbing plate 4 is fixedly connected to the inner wall of the end of the filter tube 3. The moisture-absorbing plate 4 absorbs moisture and removes water and oil mist from the hydrogen. The filter tube 3 is provided with a filter assembly for filtering hydrogen and a sealing assembly for preventing hydrogen leakage.

[0025] In one specific embodiment, the filter assembly includes a coarse filter plate 6, a fine filter plate 8, and an activated carbon filter plate 9. These three plates are arranged sequentially from left to right inside the connecting flange 2. A flow divider 7 is positioned between the coarse filter plate 6 and the fine filter plate 8, dispersing and evenly distributing hydrogen gas within the filter tube 3. This ensures sufficient contact between the hydrogen gas and the coarse filter plate 6, fine filter plate 8, and activated carbon filter plate 9, achieving efficient filtration. The sealing assembly includes a sealing frame 5. The outer wall of the sealing frame 5 is slidably connected to the inside of the filter tube 3. The outer walls of the coarse filter plate 6, flow divider 7, fine filter plate 8, and activated carbon filter plate 9 are all fixedly connected to the inner wall of the sealing frame 5. A sealing ring 10 is fixedly connected to the outer wall of the sealing frame 5, securing the coarse filter plate 6, flow divider 7, fine filter plate 8, and activated carbon filter plate 9 to the inner wall of the sealing frame 5 for easy placement and removal, while simultaneously preventing leakage through the sealing ring 10.

[0026] See Figure 1 and Figure 4A hinge 13 is fixedly connected to one side of the outer wall of the filter tube 3. A sealing cover 12 is fixedly connected to the outer wall of the hinge 13. Pulling the sealing cover 12 allows one end to rotate around the hinge 13, thereby opening and closing the filter tube 3. A connecting block 14 is fixedly connected to one end of the sealing cover 12 and the other end of the filter tube 3. A rotating shaft 15 is rotatably connected inside one of the connecting blocks 14. The sealing cover 12 and the filter tube 3 are positioned by the two connecting blocks 14. A limit component is provided on the upper side of the outer wall of the rotating shaft 15 to limit the rotation of the rotating shaft 15. A handle 19 is fixedly connected to the top of the rotating shaft 15, and a locking block 16 is fixedly connected to the bottom of the rotating shaft 15. A torsion spring 17 is sleeved on the lower side of the outer wall of the rotating shaft 15. Driving the handle 19 causes the locking block 16 to rotate, and at the same time, the torsion spring 17 torsion. When the locking block 16 rotates to a certain angle, it can move inside the connecting block 14. In addition, when the handle 19 is released, the torsion spring 17 rebounds. The device can drive the locking block 16 back to its initial state. The limiting component includes a limiting ring 18. The inner wall of the limiting ring 18 is fixedly connected to the upper side of the outer wall of the rotating shaft 15. The outer wall of the limiting ring 18 is slidably connected to the inside of the connecting block 14. The connecting block 14 has a sliding groove 20 inside. When the rotating shaft 15 rotates, it will drive the protrusion on one side of the outer wall of the limiting ring 18 to slide inside the sliding groove 20. At the same time, the design of the sliding groove 20 allows the limiting ring 18 to rotate only 90 degrees, thus achieving the limiting. The outer wall of the locking block 16 is set inside the connecting block 14. The locking block 16 is used to connect and fix the two connecting blocks 14. One end of the torsion spring 17 is fixedly connected to the inside of the connecting block 14. The torsion spring 17 is used to drive the rotating shaft 15 to rotate. The outer wall of the sealing ring 10 is attached to the inner wall of the filter tube 3. The sealing ring 10 is used to seal between the filter tube 3 and the sealing frame 5. The outer wall of the limiting ring 18 is slidably connected to the inside of the sliding groove 20. The sliding groove 20 is used to limit the rotation of the limiting ring 18.

[0027] The working principle of the hydrogen pressure swing adsorption purification rotary valve with a filtration structure of this utility model is as follows: When the hydrogen pressure swing adsorption purification rotary valve is needed, the rotary valve body 1 is first started, so that hydrogen is transported through the filter tube 3, the rotary valve body 1 and the pipeline 11. During this process, the moisture-absorbing plate 4 reduces the pollutants such as moisture and oil mist in the hydrogen, improving the efficiency of subsequent filtration. Then, the coarse filter plate 6 removes large solid particles, and then the flow divider plate 7 divides the flow so that the hydrogen is evenly distributed inside the filter tube 3, so that the hydrogen can come into more full contact with the fine filter plate 8 and the activated carbon filter plate 9. At this time, the fine filter plate 8 and the activated carbon filter plate 9 further remove small particles and adsorb organic impurities, oily substances and other harmful components in the gas. Finally, the sealing ring 10 can prevent leakage, achieving efficient filtration.

[0028] In addition, the drive handle 19 drives the rotating shaft 15, the limiting ring 18 and the locking block 16 to rotate. Due to the protrusion on one side of the limiting ring 18 cooperating with the limiting of the slide groove 20, the rotating shaft 15 can only rotate 90 degrees, which in turn causes the locking block 16 to rotate 90 degrees. The torsion spring 17 then twists. After the locking block 16 has rotated, the connecting block 14 can be pulled to separate the two connecting blocks 14. This causes the sealing cover 12 to rotate around the hinge 13. Then, the coarse filter plate 6, the diverter plate 7, the fine filter plate 8 and the activated carbon filter plate 9 can be taken out through the sealing frame 5 for cleaning or replacement. During installation, simply put the hinge 13 and the connecting block 14 back in their original positions. At this time, the rotation of the torsion spring 17 drives the locking block 16 to rotate to the initial state, and the two connecting blocks 14 are fixed again.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rotary valve for hydrogen pressure swing adsorption purification with a filtration structure, comprising a rotary valve body (1), characterized in that, Two connecting flanges (2) are fixedly installed on the outer wall of the rotary valve body (1). One of the connecting flanges (2) is fixedly connected to a filter tube (3), and the other connecting flange (2) is fixedly connected to a pipe (11). A moisture-absorbing plate (4) is fixedly connected inside the end of the filter tube (3) away from the rotary valve body (1). A filter assembly for filtering hydrogen is installed inside the filter tube (3). The filter assembly includes a coarse filter plate (6), a fine filter plate (8), and an activated carbon filter plate (9). The coarse filter plate (6), the fine filter plate (8), and the activated carbon filter plate (9) are arranged from left to right inside the connecting flange (2). A flow divider plate (7) is provided between the coarse filter plate (6) and the fine filter plate (8).

2. The hydrogen pressure swing adsorption purification rotary valve according to claim 1, characterized in that, The filter tube (3) is also provided with a sealing assembly for preventing hydrogen leakage. The sealing assembly includes a sealing frame (5), which is slidably disposed inside the filter tube (3). The outer walls of the coarse filter plate (6), the diverter plate (7), the fine filter plate (8), and the activated carbon filter plate (9) are all fixedly connected to the inner wall of the sealing frame (5). A sealing ring (10) is fixedly connected to the outer wall of the sealing frame (5).

3. The hydrogen pressure swing adsorption purification rotary valve according to claim 2, characterized in that, The outer wall of the sealing ring (10) is attached to the inner wall of the filter tube (3), and the sealing ring (10) is used to seal the filter tube (3) and the sealing frame (5).

4. The hydrogen pressure swing adsorption purification rotary valve according to claim 1, characterized in that, A hinge (13) is fixedly connected to one side of the filter tube (3). A sealing cover (12) is fixedly connected to the outer wall of the hinge (13). A connecting block (14) is fixedly connected to one end of the sealing cover (12) and the other end of the filter tube (3). A rotating shaft (15) is rotatably connected inside one of the connecting blocks (14). A limiting component for limiting the rotation of the rotating shaft (15) is provided on the upper part of the rotating shaft (15). A handle (19) is fixedly connected to the top of the rotating shaft (15). A locking block (16) is fixedly connected to the bottom of the rotating shaft (15). A torsion spring (17) is sleeved on the lower part of the rotating shaft (15).

5. The hydrogen pressure swing adsorption purification rotary valve according to claim 4, characterized in that, The limiting component includes a limiting ring (18) fixedly disposed on the upper part of the rotating shaft (15). The limiting ring (18) is slidably disposed in the groove (20) inside the connecting block (14). The groove (20) is used to limit the rotation of the limiting ring (18).

6. The hydrogen pressure swing adsorption purification rotary valve according to claim 4, characterized in that, The locking block (16) is disposed inside the connecting block (14), and the locking block (16) is used to connect and fix the two connecting blocks (14).

7. The hydrogen pressure swing adsorption purification rotary valve according to claim 4, characterized in that, One end of the torsion spring (17) is fixedly connected inside the connecting block (14), and the torsion spring (17) is used to drive the rotating shaft (15) to rotate.

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