Hydrolysis hydrogen production and water washing integrated reactor

Abstract

The invention discloses a hydrolysis hydrogen production and water washing integrated reactor which comprises a tank body, a hydrogen production cavity and a water washing cavity are formed in the tank body, a water injection port communicated with the hydrogen production cavity and a gas outlet communicated with the water washing cavity are formed in the top of the tank body, sodium borohydride powder is placed in the hydrogen production cavity, and the water washing cavity is filled with clear water. At least one gas guide pipe is arranged in the washing cavity, one end of the gas guide pipe is communicated with the top of the hydrogen production cavity, and the other end of the gas guide pipe extends to the bottom of the washing cavity and forms a height difference with the inner bottom wall of the tank body. The problems that the reactor and the washing tank are connected through a pipeline connector, particle impurities mixed in hydrogen can be attached to the pipeline and the connector between the reactor and the washing tank along with long-time large-flow hydrogen supply, and the connector and the pipeline are prone to being blocked after long-time operation are solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen production by hydrolysis, and in particular to a water-washing integrated reactor for hydrogen production by hydrolysis. Background Art

[0002] Hydrogen energy is a new type of clean energy that is crucial in the energy revolution. The world's attention to new energy sources is focused on hydrogen. It is worth noting that hydrogen, as a fuel that can provide high energy density, can be used in many fields such as automobiles and rockets. In addition, hydrogen energy has no carbon emissions and does not pollute the environment. Hydrogen energy can be used through fuel cells to generate electricity. The development of the two promotes and influences each other. The source of hydrogen has a greater impact on the development of fuel cells, mainly including: hydrogen production from water electrolysis, photocatalytic hydrogen production, hydrogen production from fossil raw materials, hydrogen production from water, etc.

[0003] The method of producing hydrogen by hydrolysis of sodium borohydride as a hydrogen source has the advantages of safe transportation, short hydrogen production response time, ready-to-use, and high hydrogen purity. It is a very promising method of producing hydrogen. Hydrogen produced by hydrolysis of sodium borohydride is used in long-term hydrogen supply of fuel cells. Its hydrogen supply stability is often controlled by water to ensure the stability of hydrogen supply. In the process of large-flow hydrogen production, due to its fast hydrogen production rate, the reactant hydrogen will carry a large amount of water vapor and wrap particulate impurities (catalysts and reaction by-products). Therefore, a water washing device is generally connected separately at the rear end of the reactor to carry out the first step of product treatment. Since the reactor and the water washing tank are connected by pipelines and interfaces, with the long-term and large-flow hydrogen supply, the particulate impurities mixed in the hydrogen will adhere to the pipelines and interfaces between the two. There is a risk of blockage in the interfaces and pipelines during long-term operation, which seriously affects the normal and stable operation of the reactor. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide an integrated water-washing reactor for hydrogen production by hydrolysis, so as to solve the problem in the prior art that the reactor and the water-washing tank are connected through a pipeline interface. With the long-term and high-flow hydrogen supply, particulate impurities contained in the hydrogen will adhere to the pipeline and interface between the two, and the interface and pipeline are prone to blockage due to long-term operation.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an integrated reactor for producing hydrogen by hydrolysis and water washing, comprising a tank body, wherein a hydrogen production cavity and a water washing cavity are arranged inside the tank body, a water injection port connected to the hydrogen production cavity and an air outlet connected to the water washing cavity are arranged on the top of the tank body, sodium borohydride powder is placed in the hydrogen production cavity, clean water is filled in the water washing cavity, at least one air guide pipe is arranged in the water washing cavity, one end of the air guide pipe is connected to the top of the hydrogen production cavity, and the other end of the air guide pipe extends to the bottom of the water washing cavity and forms a height difference with the inner bottom wall of the tank body. In some embodiments, a partition is fixedly provided in the tank body, and the partition divides the interior of the tank body into a hydrogen production cavity and a water washing cavity, wherein one end of the air duct is fixedly connected to the partition and communicates with the hydrogen production cavity.

[0006] In some embodiments, a feeding port communicating with the hydrogen production cavity is further provided on the top of the tank body, and the feeding port is connected to a cover body, and the feeding port is closed or opened by the cover body.

[0007] In some embodiments, a water inlet communicating with the water washing cavity is further provided at the top of the tank body, a drain port communicating with the water washing cavity is further provided at the bottom of the tank body, and a control valve is provided on the drain port.

[0008] In some embodiments, an exhaust valve is provided on the air outlet.

[0009] In some embodiments, the air duct is arranged along the depth direction of the water washing cavity, and the pipe opening of the air duct corresponds to the inner bottom wall of the tank body.

[0010] In some embodiments, a stirring member is further included, wherein the stirring member is connected to the tank body and is used to stir the clean water in the water washing cavity.

[0011] In some embodiments, a liquid level meter is connected to the tank body, and the liquid level meter is used to detect the liquid level in the water washing cavity.

[0012] In some embodiments, the volume of the sodium borohydride powder does not exceed 1 / 2 of the volume of the hydrogen production cavity.

[0013] In some embodiments, the volume of the water washing cavity is 1 / 2-2 / 3 of the volume of the hydrogen production cavity.

[0014] Compared with the prior art, the present invention provides an integrated reactor for producing hydrogen by hydrolysis and water washing, wherein a hydrogen production cavity and a water washing cavity are provided inside a tank body, a water injection port connected to the hydrogen production cavity and an air outlet connected to the water washing cavity are provided on the top of the tank body, sodium borohydride powder is placed in the hydrogen production cavity, clean water is filled in the water washing cavity, at least one air guide pipe is provided in the water washing cavity, one end of the air guide pipe is connected to the top of the hydrogen production cavity, and the other end of the air guide pipe extends to the bottom of the water washing cavity, and a height difference is formed with the inner bottom wall of the tank body; sodium borohydride powder reacts with water to generate gas, the gas enters the water washing cavity through the air guide pipe, and is discharged through the air outlet after filtering, particulate impurities in the reaction process remain in the water washing cavity, and water vapor impurities are basically left in the generated hydrogen, and the product is purified through subsequent post-processing, and after the reactor and the water washing tank are integrated, the pipeline interface can be reduced, and the blockage of the pipeline and the interface by particulate impurities can be effectively avoided, which is conducive to the long-term stable operation of the hydrogen production reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hydrolysis hydrogen production water washing integrated reactor provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of a hydrolysis hydrogen production water washing integrated reactor provided by an embodiment of the present invention; Figure 3 It is a schematic diagram of the connection between the air duct and the partition provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] In order to connect the reactor and the water washing tank through a pipeline interface, with the long-term and large-flow hydrogen supply, the particulate impurities contained in the hydrogen will adhere to the pipeline and interface between the two, and the interface and pipeline are prone to clogging during long-term operation. The present invention provides an integrated reactor for hydrogen production by hydrolysis and water washing, which can integrate the reactor and the water washing tank, reduce pipelines and interfaces, and ensure that the reactor can operate stably for a long time.

[0018] See also Figure 1-Figure 3 , Figure 1-Figure 3A hydrolysis and water-washing integrated reactor for hydrogen production in one embodiment of the present invention comprises a tank body 1, wherein a hydrogen production cavity 1a and a water-washing cavity 1b are provided inside the tank body 1, a water injection port 11 connected to the hydrogen production cavity 1a, and an air outlet 12 connected to the water-washing cavity 1b are provided on the top of the tank body 1, sodium borohydride powder is placed in the hydrogen production cavity 1a, and clean water is filled in the water-washing cavity 1b, at least one air duct 2 is provided in the water-washing cavity 1b, one end of the air duct 2 is connected to the top of the hydrogen production cavity 1a, and the other end of the air duct 2 extends to the bottom of the water-washing cavity 1b, and forms a height difference with the inner bottom wall of the tank body 1.

[0019] It should be noted that clean water is transported into the hydrogen production cavity 1a through the water injection port 11, so that the sodium borohydride powder can undergo a hydrolysis reaction to produce hydrogen, and the gas enters the water washing cavity 1b through the air duct 2. The gas is filtered by the clean water and then discharged through the gas outlet 12. The particulate impurities in the reaction process remain in the clean water, and the generated hydrogen basically contains water vapor impurities, and the product is purified through subsequent treatment.

[0020] In this specific embodiment, a partition 3 is fixedly provided in the tank body 1, and the partition 3 divides the interior of the tank body 1 into a hydrogen production cavity 1a and a water washing cavity 1b. The volume of the water washing cavity 1b is 1 / 2-2 / 3 of the volume of the hydrogen production cavity, wherein one end of the air duct 2 is fixedly connected to the partition 3 and communicates with the hydrogen production cavity 1a.

[0021] It should be noted that, in order to facilitate the addition of sodium borohydride powder into the hydrogen production cavity 1a, specifically, the top of the tank body 1 is also provided with a feeding port 13 connected to the hydrogen production cavity 1a, and the feeding port 13 is connected to a cover body, and the feeding port 13 is closed or opened by the cover body.

[0022] In addition, the hydrolysis of sodium borohydride to produce hydrogen has a volume expansion phenomenon during the reaction process. Excessive water inlet rate and large volume of sodium borohydride will cause the reaction liquid level to rise rapidly. In actual work, the volume of sodium borohydride powder added to the hydrogen production cavity 1a should not be too much. Generally, the volume of the sodium borohydride powder does not exceed 1 / 2 of the volume of the hydrogen production cavity 1a.

[0023] It should be noted that when the hydrogen production cavity 1a and the water washing cavity 1b are integrated into the tank body, when the water inlet rate is too high, the reaction liquid level can enter the water washing cavity 1b through the air duct 2, thereby improving the safety of the hydrolysis hydrogen production reaction.

[0024] In this specific embodiment, the top of the tank body 1 is also provided with a water inlet 14 connected to the water washing cavity 1b, and the bottom of the tank body 1 is also provided with a drain port 15 connected to the water washing cavity 1b, and a control valve is provided on the drain port 15, wherein the control valve is in a normally closed state, and liquid is transported into the water washing cavity 1b through the water inlet 14, and the lower end of the air guide pipe 2 is ensured to be inserted into the liquid, and the liquid in the water washing cavity 1b can be discharged by opening the control valve.

[0025] It should be noted that an exhaust valve is provided on the gas outlet 12. When the exhaust valve is closed, the flow rate will fluctuate due to the hysteresis of the hydrogen production process by hydrolysis of sodium borohydride. The integration of the hydrogen production cavity 1a and the water washing cavity 1b also has a buffering effect. The hydrogen after water washing is pre-stored in the upper half of the water washing cavity 1b, which can effectively reduce the fluctuation of the flow rate.

[0026] In this specific embodiment, the air duct 2 is arranged along the depth direction of the water washing cavity 1b, and the pipe mouth of the air duct 2 corresponds to the inner bottom wall of the tank body 1, wherein the height difference between the lower end of the air duct 2 and the inner bottom wall of the tank body 1 is 5 cm.

[0027] On the basis of the above scheme, in order to ensure that the gas output through the air duct can fully contact with the liquid, specifically, a stirring member is also included, and the stirring member is connected to the tank body 1, and the stirring member is used to stir the clean water in the water washing cavity 1b.

[0028] In addition, a liquid level meter 4 is connected to the tank body 1, and the liquid level meter 4 is used to detect the liquid level in the water washing cavity 1b.

[0029] In order to better understand the present invention, the following Figures 1 to 3 The technical solution of the present invention is described in detail: Before using the hydrogen production reactor, a certain height of water is injected into the water-washing cavity 1b in advance, sodium borohydride powder is evenly placed at the bottom of the hydrogen production cavity 1a, the feed port 13 is closed through the cover body, and gas is filled in for pressure holding test to complete the pre-reaction preparation work; clean water is injected into the hydrogen production cavity 1a through the water injection port 11, and the water inlet rate is adjusted. After the clean water and sodium borohydride powder come into contact, hydrogen production begins. In the initial stage, the reaction is relatively mild, and particulate impurities do not escape with the gas. As the hydrogen production flow rate increases, a large amount of water vapor and particulate impurities escape with the gas. It is carried out by the hydrogen and flows into the bottom of the water washing cavity 1b through the air guide pipe 2. At this time, the hydrogen moves from the bottom of the water washing cavity 1b to the upper part, and finally flows out from the gas outlet 12. In this process, a large amount of particulate impurities in the hydrogen are washed by water and remain at the bottom of the water washing cavity 1b; as the amount of hydrogen production increases, the water vapor movement in the water washing cavity 1b becomes more intense, and the water washing effect becomes more obvious. After the reaction is completed, water is injected into the water washing cavity 1b through the water inlet 14, and water is discharged from the drain port 15, so that the water washing cavity 1b can be cleaned.

[0030] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A hydrolysis hydrogen production water washing integrated reactor, characterized in that: It comprises a tank body, wherein a hydrogen production cavity and a water washing cavity are arranged inside the tank body, a water injection port connected to the hydrogen production cavity and an air outlet connected to the water washing cavity are arranged on the top of the tank body, sodium borohydride powder is placed in the hydrogen production cavity, the water washing cavity is filled with clean water, at least one air duct is arranged in the water washing cavity, one end of the air duct is connected to the top of the hydrogen production cavity, and the other end of the air duct extends to the bottom of the water washing cavity and forms a height difference with the inner bottom wall of the tank body.

2. The water-washing integrated reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: A partition is fixedly arranged in the tank body, and the partition divides the interior of the tank body into a hydrogen production cavity and a water washing cavity, wherein one end of the air guide pipe is fixedly connected to the partition and communicated with the hydrogen production cavity.

3. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: The top of the tank body is also provided with a feeding port communicating with the hydrogen production cavity, and the feeding port is connected with a cover body, and the feeding port is closed or opened by the cover body.

4. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 3, characterized in that: The top of the tank body is also provided with a water inlet communicated with the water washing cavity, the bottom of the tank body is also provided with a drain port communicated with the water washing cavity, and a control valve is provided on the drain port.

5. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 4, characterized in that: An exhaust valve is arranged on the air outlet.

6. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: The air guide pipe is arranged along the depth direction of the water washing cavity, and the pipe opening of the air guide pipe corresponds to the inner bottom wall of the tank body.

7. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: It also includes a stirring member, which is connected to the tank body and is used to stir the clean water in the water washing cavity.

8. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: The tank body is connected with a liquid level meter, and the liquid level meter is used to detect the liquid level in the water washing cavity.

9. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: The volume of the sodium borohydride powder does not exceed 1 / 2 of the volume of the hydrogen production cavity.

10. The integrated water-washing reactor for producing hydrogen by hydrolysis according to claim 1, characterized in that: The volume of the water washing cavity is 1 / 2-2 / 3 of the volume of the hydrogen production cavity.

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