Semi-continuous hydrolysis hydrogen supply system

Abstract

The present disclosure relates to the field of hydrogen energy, and relates to a semi-continuous hydrolysis hydrogen supply system, which comprises a hydrolysis reaction tank, a reaction liquid storage tank, a liquid pumping device, a liquid inlet pipeline, a liquid inlet valve, a liquid outlet pipeline, a liquid outlet valve, a film roll, a reactant spool, a product spool, a plurality of guide rollers and a driving device; the hydrolysis reaction tank comprises a reaction cavity, a liquid inlet, a liquid outlet and an exhaust port; the film roll comprises a film substrate and a magnesium hydride material coating on the surface of the film substrate; the reaction cavity comprises a non-reaction zone and a reaction zone; the reaction zone contains a reaction liquid; the reactant spool and the product spool are located in the non-reaction zone; at least one of the plurality of guide rollers is located in the reaction zone; a part of the film roll is wound and fixed on the reactant spool, and another part of the film roll is wound and fixed on the product spool after passing through the plurality of guide rollers in sequence; the driving device is configured to drive the reactant spool and the product spool to rotate, so that the film roll is transported from the reactant spool to the product spool.

Description

Technical Field

[0001] This disclosure relates to the fields of new energy and hydrogen energy, and in particular to a semi-continuous water electrolysis hydrogen supply system. Background Technology

[0002] Hydrogen energy is considered a secondary energy source with great development potential. Hydrogen atoms are widely present in various substances and are easily accessible. The product of hydrogen combustion is water, which is extremely environmentally friendly. While ensuring cleanliness, the water produced in the reaction can be used as a raw material for producing hydrogen, forming a good hydrogen production cycle.

[0003] In hydrogen storage, traditional high-pressure hydrogen storage tanks suffer from drawbacks such as operational difficulties, high costs, and hazardous transportation. Magnesium hydride (MgH2), as a solid hydrogen storage material, offers advantages such as high safety and high hydrogen storage density, making it one of the most promising candidate materials for hydrogen storage and supply. Furthermore, the hydrolysis reaction of magnesium hydride with water (MgH2 + 2H2O = Mg(OH)2 + 2H2(g)) can provide twice the amount of hydrogen (based on MgH2), and the resulting solid magnesium hydroxide poses minimal environmental hazard and can be recycled.

[0004] In existing technologies, the production of hydrogen through the hydrolysis of magnesium hydride still faces the following technical challenges:

[0005] 1. As the hydrolysis reaction proceeds, the generated magnesium hydroxide solid adheres to the surface of magnesium hydride, forming a passivation layer. This layer hinders the further reaction of magnesium hydride with water to release hydrogen, resulting in a sharp decrease in the reaction rate and hydrogen production. The reaction process becomes uncontrollable and fails to meet practical application requirements.

[0006] 2. Because the reaction process of the existing magnesium hydride hydrolysis hydrogen production system is uncontrollable, in order to ensure the hydrogen production, after the magnesium hydride is consumed by the hydrolysis reaction, it is necessary to recover the hydrolysis product magnesium hydroxide powder in the reaction vessel and add new magnesium hydride powder to the reactor in a timely manner to ensure the continuation of the hydrolysis reaction. However, the operation of separating and recovering the hydrolysis product magnesium hydroxide powder from the aqueous solution in the existing magnesium hydride hydrolysis hydrogen production system is complicated, the maintenance time is long, the reaction system is discontinuous and difficult to control, and it is difficult to meet the actual use requirements. Summary of the Invention

[0007] Technical issues:

[0008] A semi-continuous hydrolysis hydrogen supply system is provided to solve the technical problems of existing hydrolysis hydrogen supply systems, such as discontinuous operation, uncontrollable reaction process, difficulty in recovering products, and long maintenance time.

[0009] Technical solution:

[0010] On one hand, a semi-continuous hydrolysis hydrogen supply system is provided, comprising: a hydrolysis reaction tank, a reaction liquid storage tank, a pump, an inlet pipeline, an inlet valve, a drain pipeline, a drain valve, a film roll, a reactant roll, a product roll, multiple guide rollers, and a drive device; the hydrolysis reaction tank includes a reaction chamber, an inlet, a drain outlet, and an exhaust outlet; the inlet, the drain outlet, and the exhaust outlet are respectively connected to the reaction chamber; the exhaust outlet is located at the top of the reaction chamber; the reaction liquid storage tank, the pump, and the inlet are sequentially connected through the inlet pipeline; the inlet valve is installed on the inlet pipeline; the drain outlet is located near the bottom of the hydrolysis reaction tank; the drain outlet is connected to the drain pipeline; the drain valve is installed on the drain pipeline; the film roll includes a film substrate and a membrane located on the film. The substrate has a magnesium hydride coating on its surface; the reaction chamber includes a non-reaction zone and a reaction zone arranged vertically; the reaction zone contains a reaction liquid; the reactant roll and the product roll are located in the non-reaction zone; at least one of the plurality of guide rollers is located in the reaction zone; a portion of the film roll is wound and fixed to the reactant roll, and another portion of the film roll is wound and fixed to the product roll after passing over the plurality of guide rollers in sequence; the driving device is configured to drive the reactant roll and the product roll to rotate, so that the film roll is conveyed from the reactant roll toward the product roll; by adjusting the driving device, the conveying speed of the film roll located in the reaction zone can be adjusted, thereby controlling the reaction rate and hydrogen production of the magnesium hydride material with the reaction liquid.

[0011] In some embodiments, the reaction solution is one of water, an aqueous solution of magnesium chloride, an aqueous solution of sodium chloride, an aqueous solution of ammonium chloride, an aqueous solution of acetic acid, or an aqueous solution of citric acid.

[0012] In some embodiments, the water is tap water or deionized water.

[0013] In some embodiments, the driving device is an electric motor.

[0014] In some embodiments, the magnesium hydride material includes magnesium hydride powder or magnesium alloy hydride powder.

[0015] In some embodiments, the magnesium hydride material further includes a catalyst and / or reaction aid for the reaction of magnesium hydride with water to produce hydrogen.

[0016] In some embodiments, the semi-continuous hydrolysis hydrogen supply system further includes a hydrogen filtration and drying device, a first exhaust valve, and a second exhaust valve; the exhaust port, the first exhaust valve, the hydrogen filtration and drying device, and the second exhaust valve are connected in sequence.

[0017] In some embodiments, the semi-continuous hydrolysis hydrogen supply system further includes a hydrogen fuel cell; the hydrogen fuel cell includes a hydrogen inlet; the exhaust port, the first exhaust valve, the hydrogen filtration and drying device, the second exhaust valve, and the hydrogen inlet of the hydrogen fuel cell are connected in sequence.

[0018] In some embodiments, the method for preparing the film roll includes the following steps:

[0019] (1) Dissolve a water-soluble polymer binder in an organic solvent to obtain an organic solution of the polymer; the water-soluble polymer binder includes at least one of carboxymethyl cellulose, carboxymethyl starch, acetic acid starch, polyvinyl alcohol, polyethylene glycol, polyacrylamide and polyvinylpyrrolidone; the organic solvent does not react with magnesium hydride;

[0020] (2) The magnesium hydride material is uniformly dispersed in the organic solution of the polymer to obtain a slurry;

[0021] (3) Apply the slurry to the film substrate, and after drying, form a magnesium hydride material coating on the surface of the film substrate. Then, wind it onto a spool to form a roll.

[0022] In some embodiments, the thickness of the magnesium hydride material coating is 0.05 to 2 mm.

[0023] In some embodiments, the film substrate is made of plastic or resin polymer.

[0024] In some embodiments, the film substrate is one of polyimide resin film, polyester film, polyethylene film, polyvinyl chloride film, polystyrene film, polypropylene film, or a modified film thereof.

[0025] Beneficial effects:

[0026] 1. This invention provides a semi-continuous hydrolysis hydrogen supply system based on magnesium hydride hydrolysis reaction. It is an integrated, simple, and easy-to-operate system that enables on-demand hydrogen production, facilitates timely recovery and separation of the generated products, avoids the formation of magnesium hydroxide passivation layer that hinders further reaction between magnesium hydride and water to release hydrogen, and helps to improve the reaction rate and increase the hydrogen production per unit time.

[0027] 2. The present invention uses a rolled film comprising a thin film substrate and a magnesium hydride material coating on the surface of the thin film substrate. Compared with traditional hydrogen storage material powder, this type of hydrogen storage material is easier to store, more convenient to use, and easier to separate the products, which is beneficial to improving the controllability of the reaction.

[0028] 3. The semi-continuous hydrolysis hydrogen supply system of the present invention can control the supply speed of magnesium hydride material by controlling the rotation speed of the reactant reel and the product reel, thereby controlling the hydrogen production rate and amount of magnesium hydride hydrolysis. At the same time, it can promptly discharge and recover hydrolysis reaction products such as magnesium hydroxide, which is beneficial to the full progress of the hydrolysis reaction and the recycling and reuse of the reaction materials.

[0029] 4. This invention provides a semi-continuous hydrolysis hydrogen supply system, in which the reactant supply rate is controllable, the products are easy to recover, the operation is simple, and the maintenance time is short. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. However, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc., involved in the embodiments of this disclosure.

[0031] Figure 1 This is a schematic diagram of a semi-continuous hydrolysis hydrogen supply system according to some embodiments. Detailed Implementation

[0032] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0033] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0034] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0035] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. The term "coupled" indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communication coupling" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0036] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0037] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0038] As used herein, depending on the context, the term “if” may optionally be interpreted as meaning “when”, “in the event of”, “in response to determination”, or “in response to detection”. Similarly, depending on the context, the phrase “if it is determined that…” or “if [the stated condition or event] is detected” may optionally be interpreted as meaning “in the event of determination that…”, “in response to determination that…”, “when [the stated condition or event] is detected”, or “in response to the detection of [the stated condition or event]”.

[0039] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0040] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0041] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0042] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0043] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0044] In some embodiments, a semi-continuous water electrolysis hydrogen supply system is provided, such as Figure 1As shown, it includes: a hydrolysis reaction tank 1, a reaction liquid storage tank 21, a pump 22, an inlet pipe 23, an inlet valve 24, a drain pipe 25, a drain valve 26, a film roll 31, a reactant roll 32, a product roll 33, multiple guide rollers 34, and a drive device 35; the hydrolysis reaction tank 1 includes a reaction chamber, an inlet 12, a drain port 13, and an exhaust port 14; the inlet 12, drain port 13, and exhaust port 14 are respectively connected to the reaction chamber; the exhaust port 14 is located at the top of the reaction chamber; the reaction liquid storage tank 21, the pump 22, and the inlet 12 are sequentially connected through the inlet pipe 23; the inlet valve 24 is installed on the inlet pipe 23; the drain port 13 is located near the bottom of the hydrolysis reaction tank 1; the drain port 13 is connected to the drain pipe 25; the drain valve 26 is installed on the drain pipe 25; the film roll 31 includes a film substrate. The reaction chamber comprises a non-reaction zone A and a reaction zone B arranged vertically. The reaction zone B contains a reaction liquid. A reactant roll 32 and a product roll 33 are located in the non-reaction zone A. At least one of a plurality of guide rollers 34 is located in the reaction zone B. A portion of the film roll 31 is wound and fixed on the reactant roll 32, and another portion of the film roll 31 is wound and fixed on the product roll 33 after passing over the plurality of guide rollers 34 in sequence. A drive device 35 is configured to drive the reactant roll 32 and the product roll 33 to rotate, so that the film roll 31 is conveyed from the reactant roll 32 toward the product roll 33. By adjusting the drive device 35, the conveying speed of the film roll 31 located in the reaction zone B can be adjusted, thereby controlling the reaction rate and hydrogen production of the magnesium hydride material with the reaction liquid.

[0045] In the aforementioned embodiment, the reaction chamber in the hydrolysis reactor 1 is divided into a non-reaction zone A and a reaction zone B. Reaction zone B contains the reaction liquid and serves as the reaction site for the hydrolysis reaction between the magnesium hydride material and the reaction liquid to generate hydrogen gas. Non-reaction zone A is used to install the reactant roll 32 and the product roll 33 to prevent the magnesium hydride material coating from undergoing a rapid hydrolysis reaction with the reaction liquid, and to promptly separate the thin film with the magnesium hydroxide passivation layer surface. The reaction liquid storage tank 21, the pump 22, the inlet 12, the inlet pipe 23, and the inlet valve 24 constitute the reaction liquid supply device. The reaction liquid storage tank 21 is configured to store the reaction liquid. The reaction liquid supply device is configured to deliver the reaction liquid into the reaction chamber in the hydrolysis reactor 1. The drain port 13, the drain pipe 25, and the drain valve 26 constitute the reaction liquid discharge device. The reaction liquid discharge device is configured to discharge the waste liquid from the reaction chamber after the reaction is completed. A continuous hydrogen storage material supply and recovery device comprises a film roll 31, a reactant roll 32, a product roll 33, multiple guide rollers 34, and a drive unit 35. The device is configured to continuously supply a film coated with magnesium hydride material into the reaction chamber of the hydrolysis reactor 1 at a preset rate, and to recover the reacted film from the reaction chamber of the hydrolysis reactor 1 at a preset rate. The reactant roll 32 is configured to collect and store the film coated with magnesium hydride material in a roll shape; the product roll 33 collects and stores the reacted film in a roll shape.

[0046] The semi-continuous hydrolysis hydrogen supply system described in the above embodiment is used as follows:

[0047] (1) First use: The reaction solution storage tank 21 contains the reaction solution. Wrap the entire film roll 31 around the reactant roll 32, then pull out the film roll 31, pass it around multiple guide rollers 34 in sequence, and finally wrap it around the product roll 33 (e.g., ...). Figure 1 (As shown). The inlet valve 24 and the pump 22 are opened to deliver the reaction solution (e.g., a 5 wt% magnesium chloride aqueous solution) stored in the reaction solution storage tank 21 to the reaction chamber of the hydrolysis reaction tank 1, ensuring that the film roll 31 in reaction zone B is in full contact with the reaction solution. At this time, the magnesium hydride coating undergoes a hydrolysis reaction with water, releasing hydrogen gas. The hydrogen gas is output through the exhaust port 14. The reactant roll 32 and the product roll 33 are driven to rotate by the drive device 35, causing the film roll 31 to be conveyed from the reactant roll 32 towards the product roll 33. The conveying speed of the film roll 31 in reaction zone B can be adjusted by regulating the drive device 35.

[0048] (2) After the film roll 31 on the reactant roll 32 has been completely transported by the drive device 35, the drain valve 26 is opened so that the waste liquid after the reaction is discharged from the hydrolysis reaction tank 1 through the drain port 13 and the drain pipe 25. Then, the inlet valve 24 and the pump 22 are opened to transport the reaction liquid (e.g., 5wt% magnesium chloride aqueous solution) stored in the reaction liquid storage tank 21 to the reaction chamber of the hydrolysis reaction tank 1 to replenish the reaction liquid in time. At the same time, the film after the reaction is removed from the product roll 33, and then the new film roll 31 is completely wound and fixed on the reactant roll 32. Then, the film roll 31 is pulled out, passed around multiple guide rollers 34 in sequence, and then wound and fixed on the product roll 33 (e.g., ...). Figure 1 (As shown).

[0049] The foregoing embodiments provide a semi-continuous hydrolysis hydrogen supply system based on magnesium hydride hydrolysis reaction. It is an integrated, simple, and easy-to-operate system that enables on-demand hydrogen production, facilitates timely recovery and separation of the generated products, avoids the formation of a magnesium hydroxide passivation layer that hinders further reaction between magnesium hydride and water to release hydrogen, and helps to improve the reaction rate and increase the hydrogen production per unit time.

[0050] The foregoing embodiments used a film roll 31 comprising a film substrate and a magnesium hydride material coating on the surface of the film substrate. This form of hydrogen storage material is easier to store, more convenient to use, and easier to separate the products compared to traditional hydrogen storage material powders, which is beneficial to improving the controllability of the reaction.

[0051] The semi-continuous hydrolysis hydrogen supply system of the aforementioned embodiment can control the supply speed of magnesium hydride material by controlling the rotation speed of the reactant roll 32 and the product roll 33, thereby controlling the rate and amount of hydrogen production from magnesium hydride hydrolysis. Simultaneously, it can promptly discharge and recover hydrolysis reaction products such as magnesium hydroxide, which is beneficial for the full progress of the hydrolysis reaction and the recycling and reuse of the reacted materials.

[0052] In some embodiments, the reaction solution is one of water, an aqueous solution of magnesium chloride, an aqueous solution of sodium chloride, an aqueous solution of ammonium chloride, an aqueous solution of acetic acid, or an aqueous solution of citric acid.

[0053] In some embodiments, the water is tap water or deionized water.

[0054] In some embodiments, such as Figure 1 As shown, the drive device 35 is an electric motor. Thus, by controlling the rotational speed of the reactant roll 32 and the product roll 33, the transport speed of the thin film can be controlled, thereby controlling the transport speed of the magnesium hydride material coating in the reaction zone B, and thus adjusting the reaction rate and hydrogen production of the system.

[0055] In some embodiments, the magnesium hydride material includes magnesium hydride powder or magnesium alloy hydride powder.

[0056] In some embodiments, the magnesium hydride material further includes a catalyst and / or reaction aid for the reaction of magnesium hydride with water to produce hydrogen.

[0057] In some embodiments, such as Figure 1 As shown, the semi-continuous hydrolysis hydrogen supply system also includes a hydrogen filtration and drying device 41, a first exhaust valve 42, and a second exhaust valve 43; the exhaust port 14, the first exhaust valve 42, the hydrogen filtration and drying device 41, and the second exhaust valve 43 are connected in sequence. The hydrogen filtration and drying device 41 filters out impurities such as water vapor from the hydrogen to dry and purify it. During the reaction, the first exhaust valve 42 and the second exhaust valve 43 are opened to allow the generated hydrogen to be output through the hydrogen filtration and drying device 41.

[0058] In some embodiments, such as Figure 1 As shown, the semi-continuous hydrolysis hydrogen supply system also includes a hydrogen fuel cell 5; the hydrogen fuel cell 5 includes a hydrogen inlet 50; an exhaust port 14, a first exhaust valve 42, a hydrogen filtration and drying device 41, a second exhaust valve 43, and the hydrogen inlet 50 of the hydrogen fuel cell 5 are connected in sequence. Thus, during the reaction process, the first exhaust valve 42 and the second exhaust valve 43 are opened to output the generated hydrogen through the hydrogen filtration and drying device 41 to the hydrogen inlet 50 of the hydrogen fuel cell 5, enabling the hydrogen fuel cell 5 to supply power using hydrogen as a raw material.

[0059] In some embodiments, the method for preparing the film roll 31 includes the following steps:

[0060] (1) Dissolve the water-soluble polymer binder in an organic solvent to obtain an organic solution of the polymer; the water-soluble polymer binder includes at least one of carboxymethyl cellulose, carboxymethyl starch, acetic acid starch, polyvinyl alcohol, polyethylene glycol, polyacrylamide and polyvinylpyrrolidone (PVP); the organic solvent does not react with magnesium hydride;

[0061] (2) The magnesium hydride material is uniformly dispersed in the organic solution of the polymer to obtain a slurry;

[0062] (3) Apply the slurry to the film substrate, and after drying, form a magnesium hydride material coating on the surface of the film substrate. Then, wind it onto a spool to form a roll.

[0063] In the semi-continuous hydrolysis hydrogen supply system of the aforementioned embodiment, magnesium hydride material is coated onto a thin film substrate using a water-soluble polymer binder to form a rolled film 31 (a rolled reaction material). The magnesium hydride material coating formed by encapsulating it with the water-soluble polymer binder is more stable and can be stored for a long time. During use, the film comes into contact with the aqueous solution, the water-soluble polymer binder dissolves in the water and releases the magnesium hydride material, causing the magnesium hydride material and water to undergo a hydrolysis reaction to release hydrogen gas. This form of reaction material is easier to store and use than magnesium hydride material powder.

[0064] In some embodiments, the thickness of the magnesium hydride coating is 0.05 to 2 mm.

[0065] In some embodiments, the film substrate is made of plastic or resin polymer.

[0066] In some embodiments, the film substrate is one of polyimide resin film, polyester film, polyethylene film, polyvinyl chloride film, polystyrene film, polypropylene film, or a modified film thereof.

[0067] For example, the method for preparing the film roll 31 includes the following steps:

[0068] (1) Dissolve polyvinylpyrrolidone (PVP) in tert-butanol to obtain a 3wt% PVP solution;

[0069] (2) The magnesium hydride powder was uniformly dispersed in a 3wt% PVP solution to obtain a viscous slurry;

[0070] (3) The slurry is applied to the polyimide resin film to form a magnesium hydride powder coating with a thickness of 0.5 mm. After drying, a magnesium hydride material coating is formed on the surface of the film substrate, and then it is wound around a spool to form a roll.

[0071] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0072] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A semi-continuous hydrolysis hydrogen supply system, characterized in that, include: Hydrolysis reaction vessel, reaction liquid storage tank, liquid pump, liquid inlet pipeline, liquid inlet valve, liquid outlet pipeline, liquid outlet valve, thin film roll, reactant roll, product roll, multiple guide rollers and drive device; The hydrolysis reaction vessel includes a reaction chamber, an inlet, a outlet, and an exhaust port; the inlet, outlet, and exhaust port are respectively connected to the reaction chamber; the exhaust port is located at the top of the reaction chamber; the reaction liquid storage tank, the pump, and the inlet are sequentially connected through the inlet pipeline; the inlet valve is installed on the inlet pipeline; the outlet is located near the bottom of the hydrolysis reaction vessel; the outlet is connected to the outlet pipeline; and the outlet valve is installed on the outlet pipeline. The film roll includes a film substrate and a magnesium hydride coating on the surface of the film substrate; The reaction chamber includes a non-reaction zone and a reaction zone arranged vertically; the reaction zone contains a reaction liquid; the reactant roll and the product roll are located in the non-reaction zone; at least one of the plurality of guide rollers is located in the reaction zone; a portion of the film roll is wound and fixed on the reactant roll, and another portion of the film roll passes around the plurality of guide rollers in sequence and is then wound and fixed on the product roll; the driving device is configured to drive the reactant roll and the product roll to rotate, so that the film roll is conveyed from the reactant roll toward the product roll.

2. The semi-continuous hydrolysis hydrogen supply system according to claim 1, characterized in that, The reaction solution is one of water, magnesium chloride aqueous solution, sodium chloride aqueous solution, ammonium chloride aqueous solution, acetic acid aqueous solution, or citric acid aqueous solution.

3. The semi-continuous hydrolysis hydrogen supply system according to claim 2, characterized in that, The water is tap water or deionized water.

4. The semi-continuous hydrolysis hydrogen supply system according to claim 1, characterized in that, The driving device is an electric motor.

5. The semi-continuous hydrolysis hydrogen supply system according to claim 1, characterized in that, The magnesium hydride material includes magnesium hydride powder or magnesium alloy hydride powder.

6. The semi-continuous hydrolysis hydrogen supply system according to claim 5, characterized in that, The magnesium hydride material also includes a catalyst and / or reaction aid for the reaction of magnesium hydride with water to produce hydrogen.

7. The semi-continuous hydrolysis hydrogen supply system according to claim 1, characterized in that, It also includes a hydrogen filtration and drying device, a first exhaust valve, and a second exhaust valve; The exhaust port, the first exhaust valve, the hydrogen filtration and drying device, and the second exhaust valve are connected in sequence.

8. The semi-continuous hydrolysis hydrogen supply system according to claim 7, characterized in that, It also includes a hydrogen fuel cell; the hydrogen fuel cell includes a hydrogen inlet. The exhaust port, the first exhaust valve, the hydrogen filtration and drying device, the second exhaust valve, and the hydrogen inlet of the hydrogen fuel cell are connected in sequence.

9. The semi-continuous hydrolysis hydrogen supply system according to claim 1, characterized in that, The method for preparing the film roll includes the following steps: (1) Dissolve a water-soluble polymer binder in an organic solvent to obtain an organic solution of the polymer; the water-soluble polymer binder includes at least one of carboxymethyl cellulose, carboxymethyl starch, acetic acid starch, polyvinyl alcohol, polyethylene glycol, polyacrylamide and polyvinylpyrrolidone; the organic solvent does not react with magnesium hydride; (2) The magnesium hydride material is uniformly dispersed in the organic solution of the polymer to obtain a slurry; (3) Apply the slurry to the film substrate, and after drying, form a magnesium hydride material coating on the surface of the film substrate. Then, wind it onto a spool to form a roll.

10. The semi-continuous hydrolysis hydrogen supply system according to claim 9, characterized in that, The film substrate is made of plastic or resin polymer; the film substrate is one of polyimide resin film, polyester film, polyethylene film, polyvinyl chloride film, polystyrene film, polypropylene film, or a modified film thereof.

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