A hydrogen purification device with adsorption function

Abstract

The utility model provides a kind of hydrogen purification device with adsorption function belongs to hydrogen purification device field, including adsorption tower, adsorption subassembly and flushing subassembly;The bottom of adsorption tower is equipped with inlet pipe, and the top of adsorption tower is equipped with outlet pipe;The utility model: multiple adsorbent beds are equipped in the inside of adsorption tower, and adsorbent bed is sequentially from bottom to top: bottom layer: place active alumina, can effectively adsorb moisture and part macromolecular hydrocarbon impurity in raw material gas, middle layer: fill molecular sieve, raw material gas after active alumina preliminary processing enters molecular sieve layer, these small molecule impurities will be adsorbed by molecular sieve, further improve the purity of hydrogen, upper layer: adopt activated carbon, activated carbon can adsorb trace hydrocarbon, organic matter and other impurities remaining in raw material gas, carry out last refining to hydrogen, ensure that product hydrogen reaches high-purity requirement, improve the adsorption effect to impurity by being equipped with multiple adsorbent layers.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen purification devices, specifically a hydrogen purification device with adsorption function. Background Technology

[0002] Hydrogen, as an important industrial raw material and clean energy source, is widely used in various industries such as petrochemicals, metallurgy, electronics, and fuel cells. With the rapid development of the hydrogen energy industry, the demand for high-purity hydrogen is increasing. Currently, common hydrogen purification methods include solution absorption, membrane separation, and pressure swing adsorption (PSA). Among them, PSA has become the mainstream process for hydrogen purification due to its advantages of simple operation, low operating cost, and high product purity. However, existing PSA hydrogen purification devices still have certain shortcomings in terms of adsorbent regeneration effect, hydrogen recovery rate, and device operation stability, which need to be further improved. Utility Model Content

[0003] The purpose of this invention is to provide a hydrogen purification device with adsorption function to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen purification device with adsorption function, comprising an adsorption tower, an adsorption assembly, and a rinsing assembly;

[0005] Wherein: an air inlet pipe is installed at the bottom of the adsorption tower, and an air outlet pipe is installed at the top of the adsorption tower;

[0006] The adsorption assembly includes several layers of adsorbent beds arranged axially inside the adsorption tower. Activated alumina is placed on the surface of the bottom adsorbent bed, molecular sieves are placed on the surface of the middle adsorbent bed, and activated carbon is placed on the surface of the top adsorbent bed.

[0007] The flushing assembly includes a multi-layer support installed inside the adsorption tower, the support being arranged between several layers of adsorbent beds, a main pipeline installed at the bottom of the support, multiple branch pipes installed on both sides of the main pipeline, flushing air nozzles installed at the bottom of the branch pipes, and an air supply pipe installed on the surface of the adsorption tower.

[0008] As a preferred embodiment of this utility model: a high-pressure storage tank is provided on one side of the adsorption tower, and a low-pressure storage tank is provided on one side of the high-pressure storage tank. A pressure pipe is connected to the bottom of the high-pressure storage tank and the low-pressure storage tank respectively. A connecting pipe is connected to the bottom of the adsorption tower, and both pressure pipes are connected to the connecting pipe.

[0009] As a preferred embodiment of this utility model, solenoid valves are installed at the connection ends of both pressure pipes and connecting pipes.

[0010] As a preferred embodiment of this utility model: a backup tower is provided on one side of the adsorption tower, and a control valve is provided at the bottom of the backup tower where it connects to the air inlet pipe.

[0011] As a preferred embodiment of this utility model: a backup pipe is connected to one side of the bottom of the backup tower, one end of the backup pipe is connected to a connecting pipe, and an on / off valve is installed on the surface of the backup pipe.

[0012] As a preferred embodiment of this utility model: the top of the backup tower is connected to the gas outlet pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The adsorption tower is equipped with multiple adsorbent beds. The adsorbent beds are arranged from bottom to top as follows: bottom layer: activated alumina is placed. Activated alumina has a large specific surface area and good mechanical strength. It can effectively adsorb moisture and some large molecular hydrocarbon impurities in the raw gas. As the first layer of adsorbent, it can initially purify the raw gas and reduce the burden on subsequent adsorbents; middle layer: molecular sieve is filled. Molecular sieve has a high selective adsorption capacity for small molecular gases such as carbon dioxide, carbon monoxide, and nitrogen. After the raw gas is initially treated by activated alumina, it enters the molecular sieve layer. These small molecular impurities will be adsorbed by the molecular sieve, further improving the purity of hydrogen; top layer: activated carbon is used. Activated carbon can adsorb trace amounts of residual hydrocarbons, organic matter and other impurities in the raw gas. It can perform final purification of hydrogen to ensure that the product hydrogen meets the high purity requirements. The adsorption effect of impurities is improved by setting multiple layers of adsorbent.

[0015] (2) Through the flushing effect, when the pressure inside the adsorption tower is reduced, the adsorbed impurity gas is desorbed from the surface of the adsorbent. The gas is delivered into the main pipeline at the bottom of the support through the gas delivery pipe, and enters the branch pipe through the main pipeline. The airflow is blown out through the flushing nozzle to wash the adsorbent on the surface of the adsorbent bed, accelerate the evaporation of water in the adsorbent, and thus shorten the adsorbent recovery time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the adsorption component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the flushing assembly structure of this utility model.

[0020] In the diagram: 1. Adsorption tower; 2. Inlet pipe; 3. Outlet pipe; 4. Adsorption assembly; 41. Adsorbent bed; 42. Activated alumina; 43. Molecular sieve; 44. Activated carbon; 5. Flushing assembly; 51. Support; 52. Main pipeline; 53. Branch pipe; 54. Flushing nozzle; 55. Gas supply pipe; 6. High-pressure storage tank; 7. Low-pressure storage tank; 8. Pressure pipeline; 9. Connecting pipe; 10. Solenoid valve; 11. Backup tower; 12. Control valve; 13. Backup pipeline; 14. On / off valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, 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 scope of protection of this utility model.

[0022] Please see Figures 1-4 A hydrogen purification device with adsorption function includes: an adsorption tower 1, an adsorption assembly 4 and a rinsing assembly 5; an inlet pipe 2 is installed at the bottom of the adsorption tower 1 and an outlet pipe 3 is installed at the top of the adsorption tower 1.

[0023] Please see Figure 1 , Figure 3 The adsorption assembly 4 includes several layers of adsorbent beds 41 installed inside the adsorption tower 1 along the axial direction. Activated alumina 42 is placed on the surface of the bottom adsorbent bed 41, molecular sieves 43 are placed on the surface of the middle adsorbent bed 41, and activated carbon 44 is placed on the surface of the top adsorbent bed 41.

[0024] In practical use: The adsorption tower 1 contains multiple layers of adsorbent beds 41. From bottom to top, the adsorbent beds 41 are as follows: Bottom layer: Activated alumina 42 is placed inside. Activated alumina 42 has a large specific surface area and good mechanical strength, effectively adsorbing moisture and some large molecular hydrocarbon impurities in the raw gas. As the first layer of adsorbent, it can initially purify the raw gas and reduce the burden on subsequent adsorbents. Middle layer: Filled with molecular sieves 43. Molecular sieves 43 have a high selective adsorption capacity for small molecule gases such as carbon dioxide, carbon monoxide, and nitrogen. After the raw gas has been pre-treated by activated alumina 42, it enters the molecular sieve 43 layer, where these small molecule impurities are adsorbed, further improving the purity of hydrogen. Top layer: Activated carbon 44 is used. Activated carbon 44 can adsorb residual trace amounts of hydrocarbons, organic matter, and other impurities in the raw gas, performing final purification of the hydrogen to ensure that the product hydrogen meets high purity requirements. The multiple layers of adsorbents enhance the adsorption effect on impurities.

[0025] Please see Figure 1 , Figure 4 The rinsing assembly 5 includes a multi-layer support 51 installed inside the adsorption tower 1. The support 51 is arranged between several layers of adsorbent beds 41. A main pipeline 52 is installed at the bottom of the support 51. Multiple branch pipes 53 are installed on both sides of the surface of the main pipeline 52. A rinsing nozzle 54 is installed at the bottom of the branch pipes 53. An air supply pipe 55 is installed on the surface of the adsorption tower 1.

[0026] In practical use: After the pressure inside the adsorption tower 1 is reduced, the adsorbed impurity gas is released from the surface of the adsorbent. The gas supply pipe 55 delivers the gas into the main pipe 52 at the bottom of the support 51, and then into the branch pipe 53 through the main pipe 52. The gas flow is blown out through the flushing nozzle 54 to wash the adsorbent on the surface of the adsorbent bed 41, accelerate the evaporation of moisture in the adsorbent, and thus shorten the adsorbent recovery time.

[0027] Please see Figure 1 , Figure 2 A high-pressure storage tank 6 is provided on one side of the adsorption tower 1, and a low-pressure storage tank 7 is provided on one side of the high-pressure storage tank 6. A pressure pipe 8 is connected to the bottom of the high-pressure storage tank 6 and the low-pressure storage tank 7 respectively. A connecting pipe 9 is connected to the bottom of the adsorption tower 1. Both pressure pipes 8 are connected to the connecting pipe 9. Solenoid valves 10 are installed at the connection ends of the two pressure pipes 8 and the connecting pipe 9.

[0028] In practical use: A high-pressure storage tank 6 and a low-pressure storage tank 7 are provided on one side of the adsorption tower 1. The high-pressure storage tank 6 and the low-pressure storage tank 7 are connected to the connecting pipe 9 at the bottom of the adsorption tower 1 through pressure pipes 8. Solenoid valves 10 are installed at the connection points of the two pressure pipes 8 and the connecting pipe 9 to control the independent connection status of the high-pressure storage tank 6 and the low-pressure storage tank 7 with the adsorption tower 1. The high-pressure storage tank 6 pressurizes the adsorption tower 1. Under higher pressure, the adsorbent's adsorption capacity for impurity gases is enhanced, while its adsorption capacity for hydrogen is weaker. When the raw gas passes through the adsorbent bed 41, the impurity gases are adsorbed, and the hydrogen is gradually separated to achieve purification. When the adsorbent adsorbs impurities to a certain extent, the low-pressure storage tank 7 plays a role in depressurization. By reducing the internal pressure of the adsorption tower 1, the adsorbed impurity gases are desorbed from the surface of the adsorbent, thereby restoring the adsorbent to a state where it can carry out the next round of adsorption, ensuring the continuous availability of the adsorbent.

[0029] Please see Figure 1 A backup tower 11 is provided on one side of the adsorption tower 1, and a control valve 12 is provided at the bottom of the backup tower 11 where it is connected to the air inlet pipe 2.

[0030] In practical use: A backup tower 11 is provided on one side of the adsorption tower 1. The bottom of the backup tower 11 is connected to the inlet pipe 2 by a control valve 12. When the adsorption tower 1 is depressurized and stopped, hydrogen purification is completed by the backup tower 11. The continuous hydrogen purification is ensured by the mutual replacement of the two towers.

[0031] Please see Figure 2 A backup pipe 13 is connected to one side of the bottom of the backup tower 11. One end of the backup pipe 13 is connected to the connecting pipe 9. An on / off valve 14 is installed on the surface of the backup pipe 13.

[0032] In practical use: the backup pipeline 13 connected to one side of the backup tower 11 is connected to the connecting pipe 9 through the on / off valve 14, so that the high-pressure storage tank 6 and the low-pressure storage tank 7 are connected to the backup tower 11.

[0033] Please see Figure 1 , Figure 2 The top of the backup tower 11 is connected to the gas outlet pipe 3.

[0034] In practical use: the top of the backup tower 11 is connected to the gas outlet pipe 3, so that the two towers share the same gas outlet pipe 3.

[0035] The adsorption tower 1 contains a multi-layered adsorbent bed 41. From bottom to top, the adsorbent bed 41 consists of: a bottom layer containing activated alumina 42, which has a large specific surface area and good mechanical strength, effectively adsorbing moisture and some large-molecule hydrocarbon impurities from the raw gas; a middle layer containing molecular sieves 43, which have high selective adsorption capacity for small-molecule gases such as carbon dioxide, carbon monoxide, and nitrogen; and an upper layer containing activated carbon 44, which adsorbs residual trace amounts of hydrocarbons and organic matter from the raw gas, performing final purification of the hydrogen and ensuring high purity. The multi-layered adsorbent bed enhances the adsorption effect on impurities.

[0036] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrogen purification device with adsorption function, characterized in that, include: An adsorption tower (1) is provided with an inlet pipe (2) at the bottom and an outlet pipe (3) at the top. Adsorption component (4), the adsorption component (4) includes several layers of adsorbent bed (41) installed inside the adsorption tower (1) and arranged axially. The bottom adsorbent bed (41) is covered with activated alumina (42), the middle adsorbent bed (41) is covered with molecular sieve (43), and the top adsorbent bed (41) is covered with activated carbon (44). The flushing assembly (5) includes a multi-layer support (51) installed inside the adsorption tower (1). The support (51) is arranged between several layers of adsorbent beds (41). A main pipeline (52) is installed at the bottom of the support (51). Multiple branch pipes (53) are installed on both sides of the surface of the main pipeline (52). A flushing nozzle (54) is installed at the bottom of the branch pipe (53). An air supply pipe (55) is installed on the surface of the adsorption tower (1).

2. The hydrogen purification device with adsorption function according to claim 1, characterized in that: A high-pressure storage tank (6) is provided on one side of the adsorption tower (1), and a low-pressure storage tank (7) is provided on one side of the high-pressure storage tank (6). A pressure pipe (8) is connected to the bottom of the high-pressure storage tank (6) and the low-pressure storage tank (7). A connecting pipe (9) is connected to the bottom of the adsorption tower (1). Both pressure pipes (8) are connected to the connecting pipe (9).

3. The hydrogen purification device with adsorption function according to claim 2, characterized in that: Solenoid valves (10) are installed at the connection ends of the two pressure pipes (8) and the connecting pipe (9).

4. The hydrogen purification device with adsorption function according to claim 1, characterized in that: A backup tower (11) is provided on one side of the adsorption tower (1), and a control valve (12) is provided at the bottom of the backup tower (11) where it is connected to the air inlet pipe (2).

5. A hydrogen purification device with adsorption function according to claim 4, characterized in that: The backup tower (11) is connected to a backup pipe (13) on one side of its bottom. One end of the backup pipe (13) is connected to a connecting pipe (9). A shut-off valve (14) is installed on the surface of the backup pipe (13).

6. The hydrogen purification device with adsorption function according to claim 4, characterized in that: The top of the backup tower (11) is connected to the gas outlet pipe (3).

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