Pressure swing adsorption hydrogen purification device

Abstract

The utility model relates to the technical field of pressure swing adsorption equipment, in particular to a pressure swing adsorption hydrogen purification device which comprises a raw material gas pipeline, a plurality of flow dividing connectors are arranged on the raw material gas pipeline, an input connector is arranged at one end of the raw material gas pipeline, and a compressor, a filter and a heater are arranged between the input connector and the flow dividing connectors; the product gas pipeline is provided with gas collecting interfaces corresponding to the shunting interfaces, and one end of the product gas pipeline is provided with an output interface; the bottom side wall of the adsorption tower is provided with a gas inlet connector, the top side wall of the adsorption tower is provided with a gas production connector, the top end of the adsorption tower is provided with a sealing cover, and an adsorption part is arranged inside the adsorption tower; and the gas production interfaces of the adsorption towers are respectively communicated with the gas collection interfaces through second valves. According to the utility model, the first valve and the second valve are managed, so that the plurality of adsorption towers work asynchronously, and the adsorption parts of the adsorption towers which are not put into work can be replaced in a non-stop state, so that the uninterrupted operation of equipment is ensured, and the quality of purified hydrogen is ensured.

Description

Technical Field

[0001] This utility model relates to the field of pressure swing adsorption (PSA) equipment technology, specifically to a PSA hydrogen purification device. Background Technology

[0002] To improve the purity of hydrogen and meet the demands of high-precision industrial applications, hydrogen must undergo purification. Currently, the most common hydrogen purification process is pressure swing adsorption (PSA), which involves adsorbing carbon dioxide and carbon monoxide from a mixed gas using adsorption tubes. However, when the adsorption tubes become saturated, the hydrogen purification effect is affected, requiring maintenance and replacement of the adsorption components. This method undoubtedly reduces the efficiency of hydrogen production and purification. Utility Model Content

[0003] This invention provides a pressure swing adsorption (PSA) hydrogen purification device. By managing the first and second valves, multiple adsorption towers can operate asynchronously. Therefore, adsorption components of adsorption towers that are not in operation can be replaced without shutting down the system, thus ensuring uninterrupted operation of the equipment and guaranteeing the quality of the purified hydrogen.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure swing adsorption (PSA) hydrogen purification device, comprising: a raw material gas pipeline, wherein the raw material gas pipeline is provided with multiple branch interfaces and an input interface at one end, and a compressor, a filter, and a heater are provided between the input interface and the branch interfaces; a product gas pipeline, wherein the product gas pipeline is provided with a gas collection interface corresponding to each branch interface, and an output interface at one end; an adsorption tower, wherein the bottom side wall of the adsorption tower is provided with an inlet interface, the top side wall of the adsorption tower is provided with a gas production interface, the top of the adsorption tower is provided with a sealing cap, and an adsorption component is provided inside; multiple adsorption towers are arranged, and the inlet interface of each adsorption tower is connected to the branch interface through a first valve, and the gas production interface of each adsorption tower is connected to the gas collection interface through a second valve.

[0005] Preferably, the adsorption component includes a carbon monoxide adsorption tube and a carbon dioxide adsorption tube.

[0006] Preferably, it also includes a flushing pipeline and a desorption pipeline; the bottom end of the adsorption tower is provided with a flushing gas pipe and a desorption gas pipe corresponding to the adsorption component, the flushing gas pipe is connected to the flushing pipeline through a third valve, and the desorption gas pipe is connected to the desorption pipeline through a fourth valve.

[0007] Preferably, it also includes an intermediate tank, which is provided with a first interface and a second interface. The first interface is connected to the product gas pipeline through a fifth valve, and the second interface is connected to the flushing pipeline.

[0008] Preferably, a conical positioning block is fixedly provided at the center of the bottom of the adsorption tower, and the flushing gas pipe and the desorption gas pipe respectively pass through the conical positioning block; the sealing cover is threadedly engaged with the top of the adsorption tower, and an elastic gasket is provided at the bottom of the sealing cover corresponding to the adsorption component.

[0009] The beneficial effects of this invention are as follows: The raw material gas is connected to the raw material gas pipeline, compressed, filtered, and heated before being sent to the adsorption tower. Carbon monoxide and carbon dioxide in the raw material gas are adsorbed, achieving hydrogen purification. Finally, the purified hydrogen is sent to a storage device for storage via the product gas pipeline. During the hydrogen purification process, the management of the first and second valves allows multiple adsorption towers to operate asynchronously. Therefore, adsorption components in adsorption towers not in operation can be replaced without shutting down the system, ensuring uninterrupted operation of the equipment and guaranteeing the quality of the purified hydrogen. The intermediate tank stores a portion of purified hydrogen, which can then be used as a rewash gas source to clean and reduce some of the adsorption components within the adsorption tower, thereby extending the service life of the carbon monoxide and carbon dioxide adsorption tubes. During the cleaning process, the intermediate tank is brought under positive pressure by opening the fifth valve. Then, the third and fourth valves are opened, allowing the hydrogen from the intermediate tank to be injected into the carbon monoxide and carbon dioxide adsorption tubes through the rinsing gas pipe. Finally, the hydrogen is discharged into the desorption pipeline through the desorption gas pipe and then sorted and processed by subsequent equipment. After rinsing, the third and fourth valves are closed, and the first and second valves are opened, allowing the adsorption tower to resume operation. Conical positioning rubber blocks position and seal the bottom of the carbon monoxide and carbon dioxide adsorption tubes. When installing the sealing cap, the tightening pressure of the sealing cap presses the elastic rubber gasket against the top of the carbon monoxide and carbon dioxide adsorption tubes, thus clamping and fixing them, sealing the internal space of the carbon monoxide and carbon dioxide adsorption tubes, and meeting the rinsing requirements. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a cross-sectional view of the internal structure of the adsorption tower of this utility model.

[0013] In the diagram: 1. Raw material gas pipeline; 2. Compressor; 3. Filter; 4. Heater; 5. Product gas pipeline; 6. Adsorption tower; 7. Sealing cap; 8. First valve; 9. Second valve; 10. Carbon monoxide adsorption tube; 11. Carbon dioxide adsorption tube; 12. Flushing pipeline; 13. Desorption pipeline; 14. Flushing gas pipe; 15. Desorption gas pipe; 16. Third valve; 17. Fourth valve; 18. Intermediate tank; 19. Fifth valve; 20. Conical positioning rubber block; 21. Elastic rubber pad. Detailed Implementation

[0014] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] according to Figure 1 , Figure 2 As shown, a pressure swing adsorption (PSA) hydrogen purification device includes: a raw gas pipeline 1, which has multiple branch ports and an input port at one end, and a compressor 2, a filter 3, and a heater 4 are provided between the input port and the branch ports; a product gas pipeline 5, which has a gas collection port corresponding to each branch port and an output port at one end; and an adsorption tower 6, which has an inlet port on its bottom side wall, a gas production port on its top side wall, a sealing cap 7 at its top, and adsorption components inside; multiple adsorption towers 6 are arranged, and the inlet port of each adsorption tower 6 is connected to the branch ports through a first valve 8, and the gas production port of each adsorption tower 6 is connected to the gas collection port through a second valve 9. The adsorption components include a carbon monoxide adsorption tube 10 and a carbon dioxide adsorption tube 11.

[0016] In the above design, the raw gas is connected to the raw gas pipeline 1, and after compression, filtration, and heating, it is sent to the adsorption tower 6 to adsorb carbon monoxide and carbon dioxide in the raw gas, thereby purifying the hydrogen. Finally, the purified hydrogen is sent to the storage device for storage via the product gas pipeline 5. During the hydrogen purification process, the first valve 8 and the second valve 9 are managed to allow multiple adsorption towers 6 to operate asynchronously. Therefore, the adsorption components of adsorption towers 6 that are not in operation can be replaced without shutting down the system, thus ensuring uninterrupted operation of the equipment and guaranteeing the quality of the purified hydrogen.

[0017] It also includes a flushing pipeline 12 and a desorption pipeline 13; the bottom end of the adsorption tower 6 is provided with a flushing gas pipe 14 and a desorption gas pipe 15 corresponding to the adsorption component. The flushing gas pipe 14 is connected to the flushing pipeline 12 through a third valve 16, and the desorption gas pipe 15 is connected to the desorption pipeline 13 through a fourth valve 17. It also includes an intermediate tank 18, which is provided with a first interface and a second interface. The first interface is connected to the product gas pipeline 5 through a fifth valve 19, and the second interface is connected to the flushing pipeline 12.

[0018] Through the above design, the intermediate tank 18 stores a portion of purified hydrogen, which can then be used as a rewash gas source to clean and reduce some of the adsorption components in the adsorption tower 6, thereby improving the service life of the carbon monoxide adsorption tube 10 and the carbon dioxide adsorption tube 11. During the cleaning process, the intermediate tank 18 is brought to a positive pressure state by opening the fifth valve 19, and then the third valve 16 and the fourth valve 17 are opened to allow the hydrogen in the intermediate tank 18 to be sprayed into the carbon monoxide adsorption tube 10 and the carbon dioxide adsorption tube 11 through the flushing gas pipe 14. Finally, it is discharged into the desorption pipeline 13 through the desorption gas pipe 15 and then classified and processed by subsequent equipment. After the flushing is completed, the third valve 16 and the fourth valve 17 are closed, and the first valve 8 and the second valve 9 are opened to allow the flushed adsorption tower 6 to continue to operate.

[0019] A conical positioning rubber block 20 is fixedly provided at the center of the bottom of the adsorption tower 6. The flushing air pipe 14 and the desorption air pipe 15 respectively pass through the conical positioning rubber block 20. The sealing cover 7 is threadedly engaged with the top of the adsorption tower 6, and an elastic rubber pad 21 is provided at the bottom of the sealing cover 7 corresponding to the adsorption component.

[0020] With this setup, the conical positioning rubber block 20 positions and seals the bottom of the carbon monoxide adsorption tube 10 and the carbon dioxide adsorption tube 11. When installing the sealing cover 7, the tightening pressure of the sealing cover 7 presses the elastic rubber pad 21 onto the top of the carbon monoxide adsorption tube 10 and the carbon dioxide adsorption tube 11, thereby completing the clamping and fixing, sealing the internal space of the carbon monoxide adsorption tube 10 and the carbon dioxide adsorption tube 11, and meeting the rinsing requirements.

[0021] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A pressure swing adsorption hydrogen purification apparatus, characterized by, It includes: Raw gas pipeline (1), the raw gas pipeline (1) is provided with a plurality of shunt interfaces, and one end is provided with an input interface, and the input interface is provided with a compressor (2), a filter (3) and a heater (4) between the shunt interface; Product gas pipeline (5), the product gas pipeline (5) is provided with a gas collection interface corresponding to each shunt interface, and one end is provided with an output interface; Adsorption tower (6), the adsorption tower (6) is provided with an air inlet interface on the bottom side wall, and is provided with a gas outlet interface on the top side wall, the adsorption tower (6) is provided with a sealing cover (7) at the top end, and is provided with an adsorption component inside; The adsorption tower (6) is provided with a plurality of adsorption towers (6), and the air inlet interface of each adsorption tower (6) is communicated with the shunt interface through a first valve (8), and the gas outlet interface of each adsorption tower (6) is communicated with the gas collection interface through a second valve (9).

2. A pressure swing adsorption hydrogen purification apparatus according to claim 1, characterized by: The adsorption component includes a carbon monoxide adsorption tube (10) and a carbon dioxide adsorption tube (11).

3. A pressure swing adsorption hydrogen purification apparatus according to claim 1, characterized by: It also includes a flushing pipeline (12) and a desorption pipeline (13); the adsorption tower (6) is provided with a flushing gas pipe (14) and a desorption gas pipe (15) at the bottom end corresponding to the adsorption component, the flushing gas pipe (14) is communicated with the flushing pipeline (12) through a third valve (16), and the desorption gas pipe (15) is communicated with the desorption pipeline (13) through a fourth valve (17).

4. A pressure swing adsorption hydrogen purification apparatus according to claim 3, wherein: It also includes an intermediate tank (18), the intermediate tank (18) is provided with a first interface and a second interface, the first interface is communicated with the product gas pipeline (5) through a fifth valve (19), and the second interface is communicated with the flushing pipeline (12).

5. A pressure swing adsorption hydrogen purification apparatus according to claim 3, wherein: The adsorption tower (6) is fixedly provided with a conical positioning rubber block (20) at the bottom, the flushing gas pipe (14) and the desorption gas pipe (15) penetrate the conical positioning rubber block (20) respectively; the sealing cover (7) is threadedly connected with the top of the adsorption tower (6), and the sealing cover (7) is provided with an elastic rubber pad (21) at the bottom corresponding to the adsorption component.

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