A hydrogen purification device with adsorption function

Abstract

The utility model discloses a kind of hydrogen purification devices with adsorption function, it is related to hydrogen purification technical field, including inlet pipe, the inlet pipe side end is connected with pretreatment box, the pretreatment box side end is provided with adsorption mechanism, adsorption mechanism includes: first three-way pipe, electric valve is arranged in the first three-way pipe, the first three-way pipe is communicated with pretreatment box;Two structures same gas duct, the first three-way pipe is communicated with two gas ducts respectively;Adsorption tank, the adsorption tank is connected in gas duct;Mounting frame, the mounting frame is inserted in adsorption tank.The device is provided with two gas ducts, adsorption tank, it can be alternately operated under the cooperation of first three-way pipe, second three-way pipe, to this cooperation exhaust pipe, cleaning pipe, air pump, can realize the operation of two adsorption tanks alternately adsorbing and self-cleaning, realizes the continuous operation of hydrogen purification, improves the working efficiency of device.

Description

Technical Field

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

[0002] Hydrogen, as a clean energy source and key industrial raw material, is increasingly widely used in fuel cells, chemical synthesis, and electronic manufacturing. Its purity directly affects product quality, production safety, and energy efficiency. The raw material hydrogen produced in industrial production is usually mixed with various impurity gases such as carbon dioxide, methane, and nitrogen. Among them, carbon dioxide is a highly polar molecule, methane is a non-polar molecule, and nitrogen is a weakly polar small molecule. The presence of these impurities will lead to a decline in hydrogen quality, making it unable to meet the needs of high-precision application scenarios.

[0003] However, traditional hydrogen purification devices generally suffer from insufficient continuity. When the adsorbent is close to saturation in adsorbing impurities, the machine needs to be shut down to clean or replace the adsorbent material. During this process, the hydrogen purification process is interrupted. Moreover, the device lacks an automated cleaning and regeneration mechanism, requiring manual cleaning and replacement of the adsorbent material, which increases labor intensity and seriously affects production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a hydrogen purification device with adsorption function to solve the problems raised in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen purification device with adsorption function, comprising an inlet pipe, a pretreatment box connected to the side end of the inlet pipe, and an adsorption mechanism provided on the side end of the pretreatment box, the adsorption mechanism comprising:

[0006] The first tee pipe is equipped with an electric valve and is connected to the pretreatment box.

[0007] Two identical air guide tubes are connected to the first three-way tube respectively;

[0008] An adsorption box, which is connected inside a gas delivery pipe;

[0009] The mounting frame is inserted into the adsorption box, and the mounting frame is provided with multiple layers of molecular sieves and activated carbon layers.

[0010] The second three-way pipe is equipped with an electric valve and is connected to two air guide pipes respectively.

[0011] The second three-way pipe is connected to a buffer tank at one end, and the buffer tank is connected to an output pipe at one end. An electric valve is connected inside the output pipe.

[0012] Preferably, a dust filter frame is inserted into the pretreatment box, and a dust filter plate is connected inside the dust filter frame.

[0013] Preferably, a water vapor adsorption frame is inserted into the pretreatment box, and air vents are provided at both ends of the water vapor adsorption frame. A desiccant is stored in the water vapor adsorption frame.

[0014] Preferably, one end of the air guide pipe is connected to an exhaust pipe, and the other end is connected to a cleaning pipe. The exhaust pipe is located on both sides of the first three-way pipe, and the cleaning pipe is located on both sides of the second three-way pipe.

[0015] Preferably, a first valve is provided inside the exhaust pipe, and a second valve is provided inside the cleaning pipe.

[0016] Preferably, an air pump is connected to the side end of the cleaning pipe, and a cleaning tank is provided at the side end of the cleaning pipe, with the cleaning tank connected to the air pump.

[0017] Preferably, a heating assembly is connected to the outer end of the adsorption box, and a temperature sensor is installed inside the heating assembly.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This application incorporates molecular sieves and activated carbon within the installation frame. The molecular sieves adsorb highly polar carbon dioxide and small-molecule nitrogen, while the activated carbon adsorbs non-polar methane and weakly polar nitrogen. This process effectively removes impurities from hydrogen, significantly improving its purity. By using two gas guide pipes and adsorption boxes, when the adsorption material in one box approaches saturation and requires cleaning, the gas can be switched to the other normally operating adsorption box via electric valves in the first and second three-way pipes. This eliminates the need for shutdown to wait for cleaning or replacement, ensuring a continuous and stable output of purified hydrogen and greatly improving production efficiency.

[0020] 2. This application, by setting up an exhaust pipe, a cleaning pipe, an air pump, a cleaning tank, and a heating component, allows for automatic cleaning when cleaning the adsorbent material in one of the adsorption boxes. The first and second three-way pipes close the gas guide pipe, while the first and second valves open the exhaust pipe and cleaning pipe. At this time, the air pump and heating component start. The heating component raises the temperature of the adsorbent by heating, weakening the interaction forces between impurities and the adsorbent (such as van der Waals forces and hydrogen bonds), causing the impurities to desorb. The air pump then injects pure hydrogen from the cleaning tank into the gas guide pipe, using pure hydrogen as a carrier gas to carry the desorbed impurities out through the exhaust pipe. This completes the automatic cleaning process. This device allows for continuous hydrogen purification by alternating adsorption and cleaning operations in two adsorption boxes, improving the device's working efficiency.

[0021] 3. This application effectively removes dust and water vapor from hydrogen by installing a dust filter frame and a water vapor adsorption frame inside the pretreatment box. The dust filter plate prevents the pores of the adsorption material from being blocked by dust, thus ensuring that it remains unobstructed and maintains good adsorption capacity. The presence of water vapor may change the crystal structure or chemical properties of the adsorbent, causing it to lose its adsorption activity. The desiccant in the water vapor adsorption frame can effectively remove water vapor from hydrogen, protect the chemical stability of the adsorption material, and enable it to perform adsorption stably for a long time, thereby ensuring the performance and lifespan of the adsorption material. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a hydrogen purification device with adsorption function according to the present invention.

[0023] Figure 2 This is a top view schematic diagram of a hydrogen purification device with adsorption function according to the present invention;

[0024] Figure 3 This is a schematic diagram of the side end structure of a hydrogen purification device with adsorption function according to the present invention.

[0025] Figure 4 This is a schematic cross-sectional view of the pretreatment box structure of a hydrogen purification device with adsorption function according to this utility model.

[0026] Figure 5 This is a schematic cross-sectional view of the gas guide pipe and adsorption box of a hydrogen purification device with adsorption function according to this utility model.

[0027] The following are the labels in the diagram: 1. Inlet pipe; 2. Pretreatment box; 3. First tee pipe; 4. Air guide pipe; 5. Adsorption box; 6. Mounting frame; 7. Second tee pipe; 8. Buffer tank; 9. Output pipe; 10. Dust filter frame; 11. Water vapor adsorption frame; 12. Exhaust pipe; 13. Cleaning pipe; 14. First valve; 15. Second valve; 16. Air pump; 17. Cleaning tank; 18. Heating component. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-5As shown, this utility model provides a technical solution for a hydrogen purification device with adsorption function, including an inlet pipe 1 connected to a raw material hydrogen tank. A pretreatment box 2 is connected to the side of the inlet pipe 1, and an adsorption mechanism is installed on the side of the pretreatment box 2. A dust filter frame 10 is inserted inside the pretreatment box 2, and a dust filter plate is connected inside the dust filter frame 10. The dust filter frame 10 can effectively intercept dust particles in the hydrogen, preventing dust from entering the subsequent adsorption mechanism, extending the service life of the adsorption material, and ensuring the adsorption effect. A water vapor adsorption frame 11 is inserted inside the pretreatment box 2, with vent holes at both ends. A desiccant is stored inside the water vapor adsorption frame 11, which can absorb water vapor in the hydrogen, preventing water vapor from affecting the adsorption material and ensuring the purification effect of the adsorption material.

[0030] The adsorption mechanism includes: a first three-way pipe 3, two identical gas guide pipes 4, an adsorption box 5, a mounting frame 6, and a second three-way pipe 7. The first three-way pipe 3 is connected to the pretreatment box 2, and is also connected to the two gas guide pipes 4. The second three-way pipe 7 is also connected to the two gas guide pipes 4. Both the first three-way pipe 3 and the second three-way pipe 7 are equipped with electric valves. By opening and closing these electric valves, gas can be selectively delivered to different gas guide pipes 4 for adsorption treatment. The adsorption box 5 is connected inside the gas guide pipes 4, and the mounting frame 6 is inserted into the adsorption box 5. The mounting frame 6 is equipped with... Multilayer molecular sieves and activated carbon layers are used. Molecular sieves, with their precise pore size sieving function, have a significant adsorption effect on highly polar carbon dioxide and small nitrogen molecules. For example, 13X molecular sieves have a pore size of about 1 nm, which can efficiently capture carbon dioxide molecules (kinetic diameter 0.33 nm) and nitrogen molecules (kinetic diameter 0.364 nm), while hydrogen molecules (kinetic diameter 0.289 nm) can pass through smoothly. Activated carbon has a rich non-polar microporous structure, which has an outstanding adsorption capacity for non-polar methane (kinetic diameter 0.38 nm) and weakly polar nitrogen.

[0031] The second three-way pipe 7 is connected to a buffer tank 8 on one side, and the buffer tank 8 is connected to an output pipe 9 on the other side. The buffer tank 8 is used to stabilize the gas pressure, so that the output hydrogen pressure is more stable and convenient for subsequent use. The electric valve in the output pipe 9 controls the output of purified hydrogen.

[0032] One end of the air duct 4 is connected to the exhaust pipe 12, and the other end is connected to the cleaning pipe 13. The exhaust pipe 12 is used to discharge the exhaust gas generated during cleaning. The exhaust pipe 12 is located on both sides of the first three-way pipe 3, and the cleaning pipe 13 is located on both sides of the second three-way pipe 7. A first valve 14 is installed inside the exhaust pipe 12, and a second valve 15 is installed inside the cleaning pipe 13.

[0033] A gas pump 16 is connected to the side end of the cleaning pipe 13, and a cleaning tank 17 is provided at the side end of the cleaning pipe 13. The cleaning tank 17 is connected to the gas pump 16 and stores pure hydrogen gas. When only impurity gases need to be removed during processing, inert gas can be stored in the cleaning tank 17. A heating component 18 is connected to the outer end of the adsorption box 5. A temperature sensor is provided in the heating component 18. The temperature of the adsorbent can be increased by heating, which weakens the interaction force between the impurities and the adsorbent (such as van der Waals forces and hydrogen bonds), thereby desorbing the impurities and cleaning them.

[0034] Working principle: Hydrogen first enters the pretreatment box 2 through the inlet pipe 1. In the pretreatment box 2, the hydrogen first passes through the dust filter frame 10. The dust filter plate in the dust filter frame 10 intercepts the dust particles in the hydrogen. Then, the hydrogen passes through the water vapor adsorption frame 11. The desiccant in the water vapor adsorption frame 11 absorbs the water vapor in the hydrogen.

[0035] The pretreated hydrogen gas reaches the first three-way pipe 3. The electric valve in the first three-way pipe 3 distributes the hydrogen gas to one of the gas guide pipes 4 according to the set program (the two gas guide pipes 4 can be used alternately to ensure continuous operation of the device). After entering the gas guide pipe 4, the hydrogen gas flows into the adsorption box 5 connected to the gas guide pipe 4. In the adsorption box 5, the multi-layer molecular sieve and activated carbon layer in the mounting frame 6 adsorb impurities in the hydrogen gas, further improving the purity of the hydrogen gas. After the adsorption treatment, the hydrogen gas reaches the second three-way pipe 7. The electric valve in the second three-way pipe 7 controls the gas flow direction and delivers the purified hydrogen gas to the buffer tank 8. After the buffer tank 8 stabilizes the hydrogen gas pressure, the hydrogen gas is output through the output pipe 9.

[0036] When it is necessary to clean the adsorption box 5 and the gas guide pipe 4, close the electric valves in the corresponding first three-way pipe 3 and second three-way pipe 7, open the second valve 15 in the cleaning pipe 13 and the first valve 14 in the exhaust pipe 12, and then start the heating component 18 and the gas pump 16. The heating component 18 can increase the temperature of the adsorbent by heating, weaken the interaction force between the impurities and the adsorbent (such as van der Waals forces and hydrogen bonds), and cause the impurities to desorb. The gas pump 16 starts to transport the clean gas in the cleaning tank 17 to the adsorption box 5 and the gas guide pipe 4 through the cleaning pipe 13 to purge and clean them. The impurities are discharged from the exhaust pipe 12. This device can perform adsorption and cleaning operations on the two adsorption boxes 5 alternately, realizing the continuous purification of hydrogen.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydrogen gas purification device with adsorption function, comprising a gas inlet pipe (1), characterized in that: The intake pipe (1) is connected to a pretreatment box (2) at one end, and the pretreatment box (2) is provided with an adsorption mechanism at one end. The adsorption mechanism includes: The first three-way pipe (3) is equipped with an electric valve and is connected to the pretreatment box (2). Two identical air guide tubes (4) are connected to the first three-way tube (3) respectively; Adsorption box (5), which is connected inside the gas guide pipe (4); The mounting frame (6) is inserted into the adsorption box (5), and the mounting frame (6) is provided with multiple layers of molecular sieves and activated carbon layers. The second three-way pipe (7) is equipped with an electric valve and is connected to two air guide pipes (4) respectively. The second three-way pipe (7) is connected to a buffer tank (8) at one end, and the buffer tank (8) is connected to an output pipe (9) at one end. An electric valve is connected inside the output pipe (9).

2. The hydrogen gas purification device with adsorption function according to claim 1, characterized in that: A dust filter frame (10) is inserted into the pretreatment box (2), and a dust filter plate is connected inside the dust filter frame (10). 3.The hydrogen gas purification device with adsorption function of claim 1, wherein: A water vapor adsorption frame (11) is inserted into the pretreatment box (2). Both ends of the water vapor adsorption frame (11) are provided with air vents. A desiccant is stored in the water vapor adsorption frame (11).

4. The hydrogen gas purification device with adsorption function according to claim 1, characterized in that: One end of the air guide pipe (4) is connected to the exhaust pipe (12), and the other end is connected to the cleaning pipe (13). The exhaust pipe (12) is located on both sides of the first three-way pipe (3), and the cleaning pipe (13) is located on both sides of the second three-way pipe (7).

5. A hydrogen purification device with adsorption function according to claim 4, characterized in that: The exhaust pipe (12) is provided with a first valve (14), and the cleaning pipe (13) is provided with a second valve (15).

6. The hydrogen gas purification device with adsorption function according to claim 4, characterized in that: An air pump (16) is connected to the side end of the cleaning pipe (13), and a cleaning tank (17) is provided on the side end of the cleaning pipe (13). The cleaning tank (17) is connected to the air pump (16).

7. The hydrogen gas purification device with adsorption function according to claim 1, characterized in that: The adsorption box (5) is connected to a heating component (18) at its outer end, and a temperature sensor is installed inside the heating component (18).

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