Hydrogen production device and hydrogen production method for hydrolyzing sodium aluminum hydride paste to release hydrogen

Abstract

The hydrogen production device comprises a raw material conveying unit, a hydrogen release unit and a purification unit, and the raw material conveying unit comprises a pressure gas conveying pipeline, a sodium aluminum hydride paste storage tank, a pipeline static mixer, a water storage tank and water conveying equipment; the hydrogen release unit comprises a hydrogen release tank, a three-way valve, a gas compressor, a gas storage tank and a byproduct storage tank; the purification unit comprises a water washing device and a purification tower, and the materials are stirred by utilizing gas produced by the system, so that a stirring device is reduced, the energy consumption is reduced, and the maintenance is easier; a demanded amount of sodium aluminum hydride paste is stored in advance through the storage tank, the problem of large-scale hydrogen release is solved, gas produced by the system is used for stirring materials, stirring devices are reduced, energy consumption is reduced, and maintenance is easier; the method has the characteristics of high efficiency, safety, stability and the like, and can meet different scene requirements. The invention further discloses a hydrogen production method of the hydrogen production device for hydrolyzing the sodium aluminum hydride paste to release hydrogen.

Description

Technical Field

[0001] The present invention belongs to the field of hydrogen storage and hydrogen production, and relates to a hydrogen production device and a hydrogen production method for hydrogen evolution by hydrolysis of sodium alanate paste. Background Art

[0002] In the current world's energy field, the consumption of fossil energy is increasing day by day, and fossil energy is non-renewable. Against this background, the development of various new energy sources to replace traditional fossil energy has become a research hotspot in the current technical field. Hydrogen energy, as a new type of energy, has attracted much attention.

[0003] Hydrogen is rich in reserves on the earth and mainly exists in the form of chemical compounds. Hydrogen gas needs to be produced by various means. At present, the storage and transportation methods of hydrogen gas mostly rely on high-pressure gaseous state and low-temperature liquid state. Among them, high-pressure gaseous hydrogen storage has high requirements for equipment materials and the like, and the effective hydrogen storage capacity is small. Liquid hydrogen storage requires low-temperature storage, not only with high energy consumption, but also with large losses during the storage and transportation process.

[0004] Metal hydrides mostly exist in solid forms such as powders and granules, and can be stored and transported at normal temperature and pressure.

[0005] Solid-state hydrogen storage of metal hydrides has a high theoretical hydrogen storage capacity, and usually provides hydrogen gas in two ways: hydrogen evolution by thermal decomposition and hydrogen evolution by hydrolysis. Among them, hydrogen evolution by thermal decomposition requires high initial energy consumption, and currently, effective energy output cannot be achieved. The method of hydrogen production by hydrolysis is relatively simple, without the need for a catalyst or heating.

[0006] The use of metal hydrides has certain disadvantages. When stored in air, they are prone to react with oxygen, moisture, etc. In severe cases, combustion and explosion may occur. Metal hydrides mostly exist in the form of powders and granules, and there are certain difficulties in transporting them into a positive-pressure container for hydrogen production.

[0007] At present, the general form of hydrogen evolution from metal hydrides is to pre-place them in a hydrogen storage tank and start hydrogen evolution by delivering water into the tank according to demand. The amount of hydrogen gas produced by this method is very limited, and the hydrogen evolution raw materials cannot be continuously and massively added. Therefore, the application scenarios are restricted.

[0008] Therefore, a technical means is needed to solve the problems of the safety of storing metal hydrides such as sodium alanate in air and the difficulty of transportation. Summary of the Invention

[0009] The object of the present invention is to overcome the defects of the safety of storing sodium alanate and the difficulties in transportation in the prior art, and provide a hydrogen production device for hydrogen evolution by hydrolysis of sodium alanate paste. By pre-storing the required amount of sodium alanate paste in a storage tank, the problem of large-scale hydrogen evolution is solved; the system itself is also used to generate gas to stir the materials, reducing the stirring device, lowering the energy consumption, and being easier to maintain; it has the characteristics of high efficiency, safety, stability, etc., and can meet different scenario requirements.

[0010] Another object of the present invention is to provide a hydrogen production method for a hydrogen production device that hydrolyzes and releases hydrogen from a sodium aluminum hydride paste.

[0011] One technical solution to achieve the above object is: a hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, including a raw material transportation unit, a hydrogen release unit, and a purification unit. The raw material transportation unit includes a pressure gas transportation pipeline, a sodium aluminum hydride paste storage tank, a pipeline static mixer, a water storage tank, and a water transportation device; the hydrogen release unit includes a hydrogen release tank, a three-way valve, a gas compressor, a gas storage tank, and a by-product storage tank; the purification unit includes a water washing device and a purification tower, wherein:

[0012] The pressure gas transportation pipeline is connected to the sodium aluminum hydride paste storage tank. The sodium aluminum hydride paste storage tank is connected to the hydrogen release tank through a paste discharge channel, and the pipeline static mixer is arranged on the paste discharge channel; the water storage tank is connected to the hydrogen release tank through the water transportation device; the gas outlet of the hydrogen release tank is connected to the water washing device, the gas outlet of the water washing device is connected to the three-way valve, and one outlet of the three-way valve, the gas compressor, the gas storage tank, and the bottom return port of the hydrogen release tank are connected in sequence; the other outlet of the three-way valve is connected to the purification tower; the bottom discharge port of the hydrogen release tank is connected to the by-product storage tank.

[0013] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, the sodium aluminum hydride paste is formed by mixing sodium aluminum hydride powder and an organic carrier.

[0014] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, the mixing method is stirring or co-grinding.

[0015] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, the particle size range of the sodium aluminum hydride powder is between 0.07 mm and 0.15 mm.

[0016] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, the organic carrier has the following properties: it does not react with sodium aluminum hydride, cannot dissolve sodium aluminum hydride, and effectively wraps the sodium aluminum hydride powder.

[0017] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, the organic carrier uses cyclohexane or toluene.

[0018] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, a valve is arranged on the pressure gas pipeline.

[0019] In the above hydrogen production device for hydrolyzing and releasing hydrogen from a sodium aluminum hydride paste, the gas in the pressure gas transportation pipeline is an inert gas.

[0020] The present invention also provides a hydrogen production method for hydrolyzing and dehydrogenating sodium alanate paste, which uses the above hydrogen production device for hydrolyzing and dehydrogenating sodium alanate paste, and includes the following steps:

[0021] S1, preparing a paste-like mixture of sodium alanate and an organic carrier to obtain a fluid sodium alanate paste, and placing the sodium alanate paste in a sodium alanate paste storage tank;

[0022] S2, the gas in the pressure gas delivery pipeline drives the sodium alanate paste in the sodium alanate paste storage tank to enter the hydrogen release tank through the pipeline static mixer on the paste discharge channel; the water in the water storage tank enters the hydrogen release tank through the water delivery equipment;

[0023] S3, the sodium alanate paste and water contact and undergo a hydrolysis reaction in the hydrogen release tank to release hydrogen. The generated hydrogen is preliminarily purified through a water washing device, and then is divided into two paths at the three-way valve. One path of hydrogen is pressurized by the gas compressor and enters the gas storage tank, and then returns to the hydrogen release tank from the bottom return port of the hydrogen release tank; the other path of hydrogen is transported along the gas pipeline to the purification tower for impurity removal and then used by the hydrogen-consuming equipment;

[0024] S4, the hydrolysis reaction by-products in the hydrogen release tank are transported to the by-product storage tank through the bottom discharge port of the hydrogen release tank for temporary storage.

[0025] In the above hydrogen production method for hydrolyzing and dehydrogenating sodium alanate paste, in step S3, hydrogen returns to the hydrogen release tank from the bottom return port of the hydrogen release tank, and the mixing of the reaction materials in the hydrogen release tank is intensified by the air flow, so that the mixing of the sodium alanate paste and water is more uniform without a stirring device, and the hydrolysis reaction is more rapid and complete.

[0026] The technical solutions of the hydrogen production device and hydrogen production method for hydrolyzing and dehydrogenating sodium alanate paste of the present invention have the characteristics of high efficiency, safety, stability, etc., and can meet different scenario requirements. Specifically, the following beneficial effects are achieved:

[0027] (1) The device is simple and easy to maintain, solving the disadvantages of small hydrogenation devices with low hydrogen production and short endurance time;

[0028] (2) Solving the disadvantage of difficult transportation of solid hydrogen storage materials, making its transportation stable and controllable;

[0029] (3) Through the interlocking effect between the raw material transportation unit, hydrogen release unit, and purification unit, continuous and stable external hydrogen supply is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of a hydrogen production device for hydrolyzing and dehydrogenating sodium alanate paste of the present invention;

[0031] Figure 2 Hydrogen release data graph of the sodium aluminum hydride paste for Example 2;

[0032] Figure 3 Hydrogen release data graph of the sodium aluminum hydride paste for Example 3;

[0033] Figure 4 Hydrogen release data graph of the sodium aluminum hydride paste for Example 4;

[0034] Figure 5 Hydrogen release data graph of the sodium aluminum hydride paste for Example 5. Detailed implementation manners

[0035] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0036] It should be noted that in the description of the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that technicians may use different terms to refer to the same component. The specification and claims of the present invention do not use the difference in terms as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction. As mentioned throughout the specification and claims, the term "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". The subsequent description of the specification is for the purpose of implementing the preferred embodiments of the present invention, but the description is for the general principle of the specification and is not intended to limit the scope of the present invention. The protection scope of the present invention shall be determined by the scope defined by the appended claims.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", etc. is the orientation or positional relationship based on the working state of the present invention, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] For the convenience of understanding the embodiments of the present invention, the following will further explain with specific embodiments as examples in conjunction with the accompanying drawings, and each accompanying drawing does not constitute a limitation on the embodiments of the present invention.

[0039] Please refer to Figure 1, an embodiment of the present invention, a hydrogen production device for hydrolysis of sodium alanate paste to release hydrogen, comprising a raw material transportation unit, a hydrogen release unit and a purification unit. The raw material transportation unit includes a pressure gas transportation pipeline 1, a sodium alanate paste storage tank 2, a pipeline static mixer 5, a water storage tank 3 and a water transportation device 4; the hydrogen release unit includes a hydrogen release tank 6, a three-way valve 9, a gas compressor 10, a gas storage tank 12 and a by-product storage tank 8; the purification unit includes a water washing device 7 and a purification tower 11.

[0040] The pressure gas transportation pipeline 1 is connected to the sodium alanate paste storage tank 2. The sodium alanate paste storage tank 2 is connected to the hydrogen release tank 6 through a paste discharge channel. The pipeline static mixer 5 is arranged on the paste discharge channel; the water storage tank 3 is connected to the hydrogen release tank 6 through the water transportation device 4; the gas outlet of the hydrogen release tank 6 is connected to the water washing device 7. The gas outlet of the water washing device 7 is connected to the three-way valve 9. One outlet of the three-way valve 9, the gas compressor 10, the gas storage tank 12 and the bottom return port of the hydrogen release tank 6 are connected in sequence; the other outlet of the three-way valve 9 is connected to the purification tower 11; the bottom discharge port of the hydrogen release tank 6 is connected to the by-product storage tank 8.

[0041] The pressure gas transportation pipeline 1 is installed on the sodium alanate paste storage tank 2. A valve is configured on the pressure gas transportation pipeline 1 to control the gas path pressure and opening / closing, aiming to control the start / stop and rate of sodium alanate paste transportation.

[0042] The feeding rate and start / stop of the water in the water storage tank 3 are controlled through the water transportation device 4. The water transportation device 4 can be a type of device such as a centrifugal pump or a diaphragm pump.

[0043] The sodium alanate paste is composed of sodium alanate powder and an organic carrier mixed together. The mixing method adopts stirring or co-grinding. The particle size range of the sodium alanate powder is between 0.07 mm and 0.15 mm. The organic carrier has the following properties: it does not react with sodium alanate, cannot dissolve sodium alanate, and can effectively wrap the sodium alanate powder. For example, the organic carrier adopts cyclohexane or toluene, etc. The gas in the pressure gas transportation pipeline 1 is an inert gas, such as nitrogen or argon and other inert gases, but is not limited to these two gases.

[0044] Sodium alanate needs to be ground before preparing the paste, and after grinding, it is sieved to control the particle size range between 0.07 mm and 0.15 mm, and then stirred and mixed evenly with the organic carrier to prepare the sodium alanate paste. The organic carrier can be selected from alkane or aromatic hydrocarbon substances, which do not react with sodium alanate and can form an effective coating on sodium alanate to avoid sodium alanate contacting with oxygen and moisture in the air. By preparing the paste, the unsafe situation of sodium alanate placed in the air can be solved, and the problem of difficult transportation of solid particles to a positive pressure system can also be solved.

[0045] The present invention also provides a hydrogen production method for hydrolyzing sodium alanate paste to release hydrogen. The hydrogen production device described above is used for hydrolyzing sodium alanate paste to release hydrogen, and the method includes the following steps:

[0046] S1, Prepare a paste-like mixture of sodium alanate and an organic carrier to obtain a flowable sodium alanate paste, and place the sodium alanate paste in the sodium alanate paste storage tank 2;

[0047] S2, The gas in the pressure gas delivery pipeline 1 drives the sodium alanate paste in the sodium alanate paste storage tank 2 to enter the hydrogen release tank through the pipeline static mixer 5 on the paste discharge channel; the water in the water storage tank 3 enters the hydrogen release tank through the water delivery device 4;

[0048] S3, The sodium alanate paste contacts with water in the hydrogen release tank to undergo a hydrolysis reaction to release hydrogen:

[0049] NaAlH4 + 4H2O → NaOH + Al(OH)3 + 4H2↑

[0050] The generated hydrogen is preliminarily purified through the water washing device 7, and then is divided into two paths at the three-way valve 9. One path of hydrogen is pressurized by the gas compressor 10 and enters the gas storage tank 12, and then returns to the hydrogen release tank through the bottom return port of the hydrogen release tank 6. The mixing of the reaction materials in the hydrogen release tank is intensified by the air flow, so that the mixing of the sodium alanate paste and water is more uniform without a stirring device, the hydrolysis reaction is more rapid and thorough, the maintenance of the whole set of equipment is simple, and the energy consumption is reduced; the other path of hydrogen is transported along the gas pipeline to the purification tower 11 to remove moisture and other impurities in the hydrogen, and finally the hydrogen content can reach more than 99.90%, meeting the requirements of the use terminal and being used by the hydrogen-consuming equipment;

[0051] S4, The hydrolysis reaction by-products in the hydrogen release tank 6 are transported to the by-product storage tank 8 through the bottom discharge port of the hydrogen release tank 6 for temporary storage and subsequent unified treatment.

[0052] During the hydrogen production process, the self-generated gas of the system is used to stir the materials, reducing the stirring device, reducing the energy consumption, and being easier to maintain.

[0053] The present invention is further described below through specific examples, but these examples are only exemplary and do not constitute any limitation to the protection scope of the present invention.

[0054] Example 1

[0055] As Figure 1 shown, a hydrogen production device for hydrolyzing sodium alanate paste to release hydrogen includes a pressure gas delivery pipeline 1, a sodium alanate paste storage tank 2, a water storage tank 3, a water delivery device 4, a pipeline static mixer 5, a hydrogen release tank 6, a water washing device 7, a by-product storage tank 8, a three-way valve 9, a gas compressor 10, a gas storage tank 12, and a purification tower 11.

[0056] The pressure gas transmission pipeline 1 is connected to the sodium alanate paste storage tank 2. The sodium alanate paste is driven by gas pressure to be input into the hydrogen release tank 6 through the pipeline static mixer 5. The start-stop of the sodium alanate paste feeding and the flow rate are controlled by controlling the pressure magnitude and the opening and closing of the valves on the pressure gas transmission pipeline 1. The sodium alanate paste can make the powder and the organic carrier mix more evenly when passing through the pipeline static mixer 5, and nitrogen is selected as the driving gas.

[0057] The start-stop of the water in the water storage tank 3 and the feeding rate are controlled by the water delivery device 4. The water delivery device 4 uses a diaphragm pump.

[0058] The sodium alanate paste reacts with water to release hydrogen in the hydrogen release tank 6. After the hydrogen is generated, it is first preliminarily purified by the water washing device 7, and then passes through the three-way valve 9. A part of the hydrogen is pressurized by the compressor 10 and then enters the gas storage tank 12, and then returns to the tank from the bottom of the hydrogen release tank 6, making the reaction materials mix more fully through the gas flow, and the reaction is more rapid and thorough.

[0059] After the reaction by-products are discharged from the hydrogen release tank 6, they flow into the by-product storage tank 8 and are temporarily stored for unified treatment.

[0060] Another part of the hydrogen passes through the three-way valve 9 and then goes along the pipeline to the purification tower 11 to remove the moisture and other impurities in the hydrogen. Finally, the hydrogen content can reach more than 99.90%, meeting the requirements of the use terminal.

[0061] Example 2

[0062] Please refer to Figure 2 , a hydrogen production method for hydrolyzing sodium alanate paste to release hydrogen, comprising the following steps:

[0063] S1. Grind sodium alanate and then screen it. The particle size of the sodium alanate particles is controlled at 0.07 mm, and it is mixed with cyclohexane according to a mass ratio of 7:3 to form a sodium alanate paste with fluidity. The sodium alanate paste is stored in the sodium alanate paste storage tank 2.

[0064] S2. The sodium alanate paste is transported to the hydrogen release tank 6 through the pipeline static mixer 5 from the sodium alanate paste storage tank 2 by air pressure at a transport rate of 10 g / min. At the same time, the water delivery device 4 is used to transport water to the hydrogen release tank 6 at a transport rate of 30 g / min.

[0065] S3. After the sodium alanate paste and water enter the hydrogen release tank 6, they come into contact and start to produce hydrogen, with the reaction temperature being approximately 90°C. After the hydrogen passes through the water washing device 7, it is split through the three-way valve 9. One-third of the hydrogen is pressurized by the gas compressor 10 and then enters the gas storage tank 12, and then returns to the inside of the hydrogen release tank 6 through the bottom of the hydrogen release tank 6 to accelerate the mixing of the reaction materials; two-thirds of the hydrogen enters the purification tower 11 to further remove the impurities therein, initially forming hydrogen that meets the requirements of the user end, with the hydrogen flow rate being 12 L / min. The implementation data is shown in Figure 2 as shown;

[0066] S4. The reaction by-products, including aluminum hydroxide, sodium hydroxide solution, etc., are discharged from the bottom of the hydrogen release tank 6 and then flow into the by-product storage tank 8 for storage.

[0067] Example 3

[0068] Please refer to Figure 3 , a hydrogen production method for hydrolysis of sodium alanate paste, comprising the following steps:

[0069] S1. After grinding and sieving sodium alanate, the particle size is controlled at 0.11 mm, and it is mixed with cyclohexane according to a mass ratio of 7:3 to form a sodium alanate paste with fluidity. The sodium alanate paste is stored in the sodium alanate paste storage tank 2;

[0070] S2. Through air pressure, the sodium alanate paste is transported from the sodium alanate paste storage tank 2 to the hydrogen release tank 6 through the pipeline static mixer 5 at a transport rate of 10 g / min. At the same time, water is transported to the hydrogen release tank 6 using the water transport device 4 at a transport rate of 30 g / min;

[0071] S3. After the sodium alanate paste and water enter the hydrogen release tank 6, they come into contact and start to produce hydrogen, with the reaction temperature being approximately 90°C. After the hydrogen passes through the water washing device 7, it is split through the three-way valve 9. One-third of the hydrogen is pressurized by the gas compressor 10 and then enters the gas storage tank 12, and then returns to the tank through the bottom of the hydrogen release tank 6 to accelerate the mixing of the reaction materials; two-thirds of the hydrogen enters the purification tower 11 to further remove the impurities therein, initially forming hydrogen that meets the requirements of the user end, with the hydrogen flow rate being 12 L / min. The experimental data is shown in Figure 3 as shown;

[0072] S4. The reaction by-products, including aluminum hydroxide, sodium hydroxide solution, etc., are discharged from the bottom of the hydrogen release tank 6 and then flow into the by-product storage tank 8 for storage.

[0073] Example 4

[0074] Please refer to Figure 4 , a hydrogen production method for hydrolysis of sodium alanate paste, comprising the following steps:

[0075] S1. Grind sodium alanate and then screen it. Control the particle size of sodium alanate particles at 0.15 mm, and mix it with cyclohexane according to a mass ratio of 7:3 to form a sodium alanate paste with fluidity. Store the sodium alanate paste in the sodium alanate paste storage tank 2;

[0076] S2. Through air pressure, transport the sodium alanate paste from the sodium alanate paste storage tank 2 to the hydrogen release tank 6 through the pipeline static mixer 5 at a transport rate of 10 g / min. At the same time, use the water transport device 4 to transport water to the hydrogen release tank 6 at a transport rate of 30 g / min;

[0077] S3. After the sodium alanate paste and water enter the hydrogen release tank 6, they come into contact and start to produce hydrogen. The reaction temperature is about 90 °C. After the hydrogen passes through the water washing device 7, it is split through the three-way valve 9. One-third of the hydrogen is pressurized by the gas compressor 10 and then enters the gas storage tank 12, and then returns to the tank through the bottom of the hydrogen release tank 6 to accelerate the mixing of the reaction materials; two-thirds of the hydrogen enters the purification tower 11 to further remove the impurities therein, initially forming hydrogen that meets the requirements of the user end, and the hydrogen flow rate is 12 L / min. The experimental data are as Figure 4 shown.

[0078] S4. The reaction by-products, including aluminum hydroxide, sodium hydroxide solution, etc., are discharged from the bottom of the hydrogen release tank 6 and flow into the by-product storage tank 8 for storage.

[0079] Example 5

[0080] Please refer to Figure 5 , a hydrogen production method for hydrolyzing hydrogen from sodium alanate paste, comprising the following steps:

[0081] S1. Grind sodium alanate and then screen it. Control the particle size at 0.11 mm, and mix it with toluene according to a mass ratio of 7:3 to form a sodium alanate paste with fluidity. Store the sodium alanate paste in the sodium alanate paste storage tank 2;

[0082] S2. Through air pressure, transport the sodium alanate paste from the storage tank 1 to the hydrogen release tank 6 through the pipeline static mixer 5 at a transport rate of 10 g / min. At the same time, use the water transport device to transport water to the hydrogen release tank 6 at a transport rate of 30 g / min;

[0083] S3. After the sodium alanate paste and water enter the hydrogen release tank 6, they come into contact and start to produce hydrogen. The reaction temperature is about 90 °C. After the hydrogen passes through the water washing device 7, it is split through the three-way valve 9. One-third of the hydrogen is pressurized by the compressor 10 and then enters the gas storage tank 12, and then returns to the tank through the bottom of the hydrogen release tank 6 to accelerate the mixing of the reaction materials; two-thirds of the hydrogen enters the purification tower 11 to further remove the impurities therein, initially forming hydrogen that meets the requirements of the user end, and the hydrogen flow rate is 12 L / min. The experimental data are as Figure 5 shown;

[0084] After the reaction by-products such as aluminum hydroxide and sodium hydroxide solution are discharged from the hydrogen release tank 6, they flow into the by-product storage tank 8 for storage.

[0085] For the hydrogen production device for hydrolytic hydrogen release of sodium aluminum hydride paste of the present invention, the raw material conveying unit is used to convey the sodium aluminum hydride paste and water into the hydrogen release tank through gas pressure and conveying equipment respectively; the hydrogen release unit, in the hydrogen release tank, the sodium aluminum hydride paste reacts with water to release hydrogen; the purification unit is used to remove solid particles, dust, moisture and other impurities in the produced hydrogen through a water washing device and a purification tower respectively.

[0086] Through the interlocking effect among the raw material conveying unit, the hydrogen release unit and the purification unit, continuous and stable external hydrogen supply can be achieved. During the hydrogen production process, no additional stirring device is required. The gas generated by the system itself flows back into the hydrogen release tank, and the airflow intensifies the mixing of the reaction materials in the hydrogen release tank, making the mixing of the sodium aluminum hydride paste and water more uniform without a stirring device, and the hydrolysis reaction is faster and more complete, making the maintenance of the whole set of equipment simple and the energy consumption reduced.

[0087] In summary, for the hydrogen production device and hydrogen production method for hydrolytic hydrogen release of sodium aluminum hydride paste of the present invention, preparing the paste can solve the problem that sodium aluminum hydride is unsafe when placed in the air, and can also solve the problem that it is difficult to convey solid particles to a positive pressure system. The present invention also uses the gas generated by the system itself to stir the materials, reducing the stirring device, lowering the energy consumption and being easier to maintain. The present invention can also pre-store the required amount of sodium aluminum hydride paste in a storage tank to solve the problem of large-scale hydrogen release and can meet different scenario applications.

[0088] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as it is within the scope of the essential spirit of the present invention, the changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A hydrogen production device for hydrolysis of sodium aluminum hydride paste, characterized in that: It includes a raw material delivery unit, a hydrogen release unit and a purification unit. The raw material delivery unit includes a pressure gas delivery pipeline, a sodium aluminum hydride paste storage tank, a pipeline static mixer, a water storage tank and a water delivery device; the hydrogen release unit includes a hydrogen release tank, a three-way valve, a gas compressor, a gas storage tank and a by-product storage tank; the purification unit includes a water washing device and a purification tower, wherein: The pressure gas delivery pipeline is connected to the sodium aluminum hydride paste storage tank, the sodium aluminum hydride paste storage tank is connected to the hydrogen release tank through the paste discharge channel, and the pipeline static mixer is arranged on the paste discharge channel; the water storage tank is connected to the hydrogen release tank through the water delivery equipment; the gas outlet of the hydrogen release tank is connected to the water washing device, the gas outlet of the water washing device is connected to the three-way valve, one of the outlets of the three-way valve, the gas compressor, the gas storage tank and the bottom reflux port of the hydrogen release tank are connected in sequence; the other outlet of the three-way valve is connected to the purification tower; the bottom discharge outlet of the hydrogen release tank is connected to the by-product storage tank.

2. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 1, characterized in that: The sodium aluminum hydride paste is prepared by mixing sodium aluminum hydride powder and an organic carrier.

3. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 2, characterized in that: The mixing method is stirring or co-grinding.

4. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 2, characterized in that: The particle size of the sodium aluminum hydride powder ranges from 0.07 mm to 0.15 mm.

5. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 2, characterized in that: The organic carrier has the following properties: it does not react with sodium aluminum hydride, cannot dissolve sodium aluminum hydride, and can effectively wrap sodium aluminum hydride powder.

6. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 5, characterized in that: The organic carrier is cyclohexane or toluene.

7. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 1, characterized in that: The pressure gas pipeline is provided with a valve.

8. A hydrogen production device for hydrolysis of sodium aluminum hydride paste as claimed in claim 1, characterized in that: The gas in the pressure gas delivery pipeline is an inert gas.

9. A method for producing hydrogen by hydrolyzing hydrogen from a sodium aluminum hydride paste, using the hydrogen production device as claimed in claim 1, characterized in that: The following steps are involved: S1, preparing sodium aluminum hydride and an organic carrier into a paste mixture to obtain a sodium aluminum hydride paste with fluidity, and placing the sodium aluminum hydride paste in a sodium aluminum hydride paste storage tank; S2, the gas in the pressure gas delivery pipeline drives the sodium aluminum hydride paste in the sodium aluminum hydride paste storage tank to enter the hydrogen release tank through the pipeline static mixer on the paste discharge channel; the water in the water storage tank enters the hydrogen release tank through the water delivery equipment; S3, the sodium aluminum hydride paste contacts water in the hydrogen release tank to undergo a hydrolysis reaction to release hydrogen, and the generated hydrogen is preliminarily removed from impurities by a water washing device, and then divided into two paths by the three-way valve, one of which is pressurized by the gas compressor and enters the gas storage tank, and then refluxes into the hydrogen release tank from the bottom reflux port of the hydrogen release tank; the other is transported to the purification tower along the gas pipeline for removal of impurities and then used by the hydrogen-using equipment; S4, the by-products of the hydrolysis reaction in the hydrogen release tank are transported to the by-product storage tank through the bottom discharge port of the hydrogen release tank for temporary storage.

10. A method for producing hydrogen by hydrolysis of sodium aluminum hydride paste as claimed in claim 9, characterized in that: In step S3, hydrogen flows back into the hydrogen release tank from the bottom reflux port of the hydrogen release tank, and the mixing of the reaction materials in the hydrogen release tank is intensified by the airflow, so that the sodium aluminum hydride paste and water are mixed more evenly without a stirring device, and the hydrolysis reaction is faster and more thorough.

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