Modularized hydrogen production device based on hydrolysis reaction

Abstract

The utility model relates to the technical field of hydrogen production devices, and provides a modular hydrogen production device based on hydrolysis reaction, which comprises a reactor shell, a temperature measuring unit, a water supply unit, a control unit and a plurality of reaction units arranged in the reactor shell, the reaction unit is provided with a physical interlayer, and a hydrogen storage material is placed in the physical interlayer; a water inlet and an air outlet are respectively formed in the physical interlayer; the temperature measuring unit comprises a plurality of temperature measuring probes; the water supply unit comprises a plurality of water outlet pipes; each group of temperature measuring probe and water outlet pipe extends into the corresponding physical interlayer from the water inlet; and the temperature measuring probe and the control valve of the water outlet pipe are respectively in signal connection with the control unit. According to the utility model, through the combination of a plurality of modularized reaction units, each group of reaction units can be independently operated, so that the controllability of the hydrogen production device is improved, the overall hydrogen desorption rate of the hydrogen production device becomes stable, the utilization rate of a hydrogen storage material is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production equipment, in particular to a modular hydrogen production device based on hydrolysis reaction. Background Art

[0002] Hydrogen is not only an important chemical raw material but also an important energy carrier, which is widely used in various fields of social production. However, due to the properties of hydrogen such as light weight and difficulty in liquefaction, it causes special difficulties in storage, transportation, etc., making the use cost of hydrogen high and the application range difficult to be further expanded. To solve this problem, an in-situ hydrogen production and supply device based on the hydrolysis process of hydrogen storage materials has become an effective way to alleviate the above problems.

[0003] The hydrolysis reaction of solid hydrogen storage materials is a simple and effective hydrogen production method. When the solid hydrogen storage materials hydrolyze to produce hydrogen, the reaction process will go through stages such as startup, maintenance, and attenuation, as Figure 1 shown. The startup stage lasts for a relatively short time. After a period of energy accumulation, the reaction rate accelerates and the hydrogen release rate rapidly increases; the maintenance stage lasts for a long time and the hydrogen release rate is relatively stable; the attenuation stage lasts for a long time and the hydrogen release rate continuously decreases.

[0004] Therefore, the hydrogen release rate of a single integral hydrogen production device fluctuates greatly and is difficult to control. It often requires a large-volume voltage stabilizing device and a large-flow heat extraction device. At the same time, due to the long duration of the attenuation stage in the hydrolysis process, the utilization rate of hydrogen storage materials is reduced, resulting in increased costs. Summary of the Utility Model

[0005] The utility model mainly solves the technical problem that the existing hydrogen production equipment has a low utilization rate of hydrogen storage materials, resulting in increased costs. It proposes a modular hydrogen production device based on hydrolysis reaction. Through the combination of multiple modular reaction units, each group of reaction units can be operated independently, improving the controllability of the hydrogen production device, making the overall hydrogen release rate of the hydrogen production device stable, increasing the utilization rate of hydrogen storage materials, and reducing costs.

[0006] The utility model provides a modular hydrogen production device based on hydrolysis reaction, including: a reactor housing, a temperature measurement unit, a water supply unit, a control unit, and a plurality of reaction units arranged in the reactor housing;

[0007] The reaction unit has a physical partition layer, and the physical partition layer is used to place hydrogen storage materials; an inlet and an outlet are respectively provided on the physical partition layer;

[0008] The temperature measurement unit includes: a plurality of temperature measurement probes;

[0009] The water supply unit includes: a plurality of outlet pipes;

[0010] Each group of temperature measurement probes and the water outlet pipe extend into the corresponding physical partition from the water inlet.

[0011] The control valves of the temperature measurement probes and the water outlet pipe are respectively connected to the control unit in a signal manner.

[0012] Preferably, it further includes: a heat extraction unit;

[0013] The heat extraction unit includes: a pump;

[0014] The heat exchange pipeline connected to the pump extends into the reactor housing;

[0015] The pump is connected to the control unit in a signal manner.

[0016] Preferably, it further includes: a pressure measurement unit;

[0017] The pressure measurement unit includes: a pressure sensor;

[0018] The probe of the pressure sensor extends into the reactor housing;

[0019] The pressure sensor is connected to the control unit in a signal manner.

[0020] Preferably, a hydrogen outlet is provided on the reactor housing.

[0021] Preferably, an exhaust valve is installed at the hydrogen outlet, and the exhaust valve is connected to the control unit in a signal manner.

[0022] Preferably, the air outlet is provided with a filter screen.

[0023] Preferably, the reactor housing is made of a metal material housing.

[0024] Preferably, the physical partition is made of a thin-walled stainless steel box or an aluminum foil bag.

[0025] Preferably, the water inlet of the physical partition is provided with a screw thread;

[0026] The temperature measurement probes and the water outlet pipe are installed in a telescopic pipe, and the telescopic pipe is connected to one end of a quick connector through a locking device;

[0027] The other end of the quick connector is docked with the screw thread.

[0028] The utility model provides a modular hydrogen production device based on hydrolysis reaction. Through the combination of multiple modular reaction units, each group of reaction units can be operated separately, which is convenient for adjusting the reaction process between the reaction units, improving the controllability of the hydrogen production device, weakening the fluctuation of the overall hydrogen release rate of the hydrogen production device, achieving stable hydrogen supply, making the overall hydrogen release rate of the hydrogen production device stable, and promoting the use of hydrogen storage materials in the attenuation stage, improving the utilization rate of hydrogen storage materials, and reducing costs. Through modular design, the reaction process in the reactor is easier to control; there is no need to configure a large-volume voltage-stabilizing device and a large-flow heat extraction device. By monitoring the pressure of the reactor and the temperature of the reaction unit, the control of the reaction process is more accurate; through the coordination of the reaction process between the reaction units, the fluctuation of the hydrogen flow rate at the reactor outlet is smoothed to achieve stable hydrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a hydrogen release rate curve of a hydrogen production device in the prior art;

[0030] Figure 2 It is a structural schematic diagram of a modular hydrogen production device based on hydrolysis reaction provided by the utility model;

[0031] Figure 3 It is a schematic diagram of the temperature measuring probe and the water outlet pipe provided by the utility model extending into the physical barrier;

[0032] Figure 4 It is a physical picture of the physical barrier, telescopic tube and quick connector provided by the utility model;

[0033] Figure 5 It is a schematic diagram of the startup control process of the modular hydrogen production device based on the hydrolysis reaction provided by the utility model.

[0034] Figure numerals: 1. Reactor shell; 2. Reaction unit; 3. Air outlet; 4. Physical barrier; 5. Temperature probe; 6. Temperature measuring unit; 7. Pressure sensor; 8. Pressure measuring unit; 9. Water outlet pipe; 10. Water supply unit; 11. Pump; 12. Heat extraction unit; 13. Control unit; 14. Exhaust valve; 15. Hydrogen outlet; 16. Filter; 17. Screw mouth; 18. Telescopic tube; 19. Locking device; 20. Quick connector. DETAILED DESCRIPTION

[0035] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the sake of ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of the contents.

[0036] As Figure 2 shown, a modular hydrogen production device based on hydrolysis reaction provided by an embodiment of the present utility model includes: a reactor housing 1, a temperature measuring unit 6, a water supply unit 10, a control unit 13, and a plurality of reaction units 2 disposed within the reactor housing 1.

[0037] The reactor housing 1 is made of a metal material housing, which can withstand pressure and contains a number of modular reaction units 2. Each reaction unit 2 can perform the hydrolysis process relatively independently.

[0038] The reaction unit 2 has a physical partition layer 4, and the physical partition layer 4 is used to place hydrogen storage materials (which can be aluminum powder, magnesium powder, magnesium hydride, etc.); an inlet and an outlet 3 are respectively provided on the physical partition layer 4; the outlet 3 is provided with a filter net 16.

[0039] The temperature measuring unit 6 includes: a plurality of temperature measuring probes 5. The water supply unit 10 includes: a plurality of outlet pipes 9. Each group of temperature measuring probes 5 and outlet pipes 9 extend into the corresponding physical partition layer 4 from the inlet. The outlet pipe 9 extends into the reaction unit 2 / 3 of the way. The outlet pipe 9 is used to inject water into the reaction unit 2 to cause magnesium hydride to react with water to generate hydrogen. The hydrogen is discharged through the outlet 3.

[0040] The control valves of the temperature measuring probes 5 and the outlet pipes 9 are respectively connected to the control unit 13 in a signal manner. The temperature measuring unit 6 extends into the reaction unit through the temperature measuring probes 5, and the extending length of the temperature measuring probes 5 is 2 / 3 of the reaction unit 2, and feeds back the temperature value to the control unit. The control valve of the outlet pipe 9 receives the instruction of the control unit and injects water into the reaction unit.

[0041] The modular hydrogen production device based on hydrolysis reaction of the present utility model further includes: a heat extraction unit 12. The heat extraction unit 12 includes: a pump 11; the heat exchange pipeline connected to the pump 11 extends into the reactor housing 1; the pump 11 is connected to the control unit 13 in a signal manner. The heat extraction unit 12 receives the instruction of the control unit and drives the pump 11 to extract heat from the reactor housing 1 by means of a refrigerant.

[0042] The modular hydrogen production device based on hydrolysis reaction of the present utility model further includes: a pressure measuring unit 8. The pressure measuring unit 8 includes: a pressure sensor 7; the measuring head of the pressure sensor 7 extends into the reactor housing 1; the pressure sensor 7 is connected to the control unit 13 in a signal manner. The pressure measuring unit measures the pressure within the reactor housing 1 through the pressure sensor 7 and feeds back the pressure value to the control unit.

[0043] The control unit receives the output signals of the pressure measuring unit and the temperature measuring unit, and issues action instructions to the water supply unit 10 and the heat extraction unit 12.

[0044] A hydrogen outlet 15 is provided on the reactor housing 1. An exhaust valve 14 is installed at the hydrogen outlet 15, and the exhaust valve 14 is in signal connection with the control unit 13. The exhaust valve 14 is opened under the drive of the control unit when the pressure inside the reactor housing 1 reaches a set value, and is closed when it is lower than the set value.

[0045] The multiple reaction units 2 of the present utility model are made independent by arranging a fixed and breathable support partition in the reactor housing 1 and cooperating with a heat-resistant material to make a physical partition layer. Due to the modular configuration inside the reactor, grouping operations can be carried out, which can significantly improve the control ability of the hydrogen production process. Specifically, the physical partition layer 4 can adopt heat-resistant materials with light structures such as aluminum foil bags or thin-walled stainless steel boxes. As Figure 3 shown, after the magnesium hydride is pressed into tablets, it is filled into a stainless steel semi-closed box as the reaction vessel of the reaction unit 2; the influence of excess water vapor is isolated, making the module independent and more controllable.

[0046] As Figure 4 shown, a screw thread 17 is provided at the water inlet of the physical partition layer 4; the temperature measuring probe 5 and the water outlet pipe 9 are installed in the telescopic pipe 18, and the telescopic pipe 18 is connected to one end of the quick connector 20 through a locking device 19; the other end of the quick connector 20 is docked with the screw thread 17. The present utility model is provided with a quick connection structure, which is convenient and airtight when an external device is connected to the reaction unit 2. At the start of the hydrolysis reaction, quick connection is achieved on the premise of minimizing the entry of external air as much as possible. The temperature measuring probe 5 and the water outlet pipe 9 are built into the telescopic pipe 18. When connected to the physical partition layer 4, the telescopic pipe 18 shrinks, and the temperature measuring probe 5 and the water outlet pipe 9 protrude and penetrate into the designated position of the physical partition layer 4; when disconnected, the telescopic pipe 18 extends, and the temperature measuring probe 5 and the water outlet pipe 9 shrink and return to the telescopic pipe 18; a valve-like locking device 19 is provided at the end of the telescopic pipe 18 to isolate the entry of external air.

[0047] The modular hydrogen production device based on hydrolysis reaction of the present utility model modularizes the reactor design. Through physical means, the internal space of the reactor housing 1 is divided into several regions (multiple reaction units 2), making the hydrolysis reaction processes of the solid hydrogen storage materials in each region relatively independent and becoming modular units that are convenient for independent control. According to the hydrogen release rate requirement of the overall device, the reaction units 2 are grouped. It can be one unit per group or several units per group. The size of each reaction unit 2 can be designed according to the weight of magnesium hydride required. For example, if 1000 g of magnesium hydride is needed, the designed capacity volume can be about 2 L. Driven by the control unit 13, the water supply unit 10 injects water into the first group of reaction units 2, and then the hydrolysis hydrogen production starts. During the experiment, the pressure inside the reactor housing 1 gradually increases as the gas accumulates. When the exhaust pressure reaches the set value (3 bar), the control unit 13 drives the opening of the exhaust valve 14 to discharge to the hydrogen outlet 15.

[0048] The modular design adopted by the present utility model determines the size of a modular reaction unit and the amount of the internal hydrogen storage material according to the regulation performance of the hydrolysis reaction of the hydrogen storage material; according to the hydrogen release rate and hydrogen release amount requirements of the hydrogen production device, the number of modular reaction units is determined, thus realizing the modular design inside the reactor. The deployment of the reaction process refers to coordinating the hydrogen release rates of the modular units by adjusting the number of modular units and controlling the start time and interruption time of their hydrolysis reactions, achieving precise control, and thus ensuring the smoothness of the overall hydrogen production rate of the hydrogen release device. The hydrolysis reaction rate of magnesium hydride is closely related to temperature. At the beginning of the hydrolysis reaction, the temperature is relatively low and the rate is slow; as the reaction process progresses, the temperature of the reaction system rises rapidly and the hydrolysis reaction rate increases rapidly; then, as the balance between heat dissipation and heat release is reached, the reaction rate reaches the peak; as magnesium hydride is gradually depleted, the temperature drops and the reaction rate decreases. Therefore, the reaction process can be partitioned according to the temperature of the reaction system. By adjusting the start time, duration, and interruption time of the reaction, each module can be in different reaction processes to achieve heterogeneous matching of the processes.

[0049] The start control process of the reaction unit 2 that can be supported by the present utility model is as follows Figure 5As shown, when the first group of reaction units 2 enters the hydrogen release rate decay stage, and the pressure measuring unit 8 measures through the pressure sensor 7 that the pressure inside the reactor is close to the set value of the exhaust pressure, the control unit 13 drives the water supply unit 10 to inject water into the second group of reaction units 2, and starts hydrolysis hydrogen production. When the second group of reaction units 2 enters the hydrogen release rate decay stage, water is injected into the third group of reaction units 2 to start hydrolysis hydrogen production, and so on, until all groups of reaction units participate in the hydrolysis reaction. When the last group of reaction units 2 enters the hydrogen release rate decay stage and the pressure inside the reactor is lower than the exhaust pressure, the stable hydrogen release process of the hydrogen production device of the present utility model ends. At this time, the exhaust pressure can also be reduced to 1 bar according to actual needs to continue hydrogen release to the outside.

[0050] When the temperature measuring probe 5 measures that the temperature inside the reactor exceeds the preset temperature, the control unit 13 will receive the signal from the temperature measuring unit 6 and drive the heat extraction unit 12 to input refrigerant into the heat exchange pipeline inside the reactor to lower the temperature inside the reactor and ensure that the hydrolysis process is under stable and controllable temperature conditions.

[0051] In the present utility model, the outlet pressure fluctuation represents the fluctuation of the hydrogen flow rate. Stabilizing the pressure can stabilize the flow rate. The outlet pressure is related to the gas volume inside the device cavity. The gas volume is adjusted by the reaction rate inside the reaction unit 2, and the reaction rate is determined by the temperature and water supply flow rate inside the reaction unit 2. Therefore, based on the outlet gas pressure fluctuation and the temperature inside the reaction bag, adjusting the water supply amount of each module can adjust and stabilize the hydrogen flow rate of the device.

[0052] A modular hydrogen production device based on hydrolysis reaction provided by the present utility model changes the single integral structure inside the hydrolysis reactor. Through the combination of multiple modular reaction units 2, each group of reaction units 2 can be operated independently, improving the controllability of the hydrogen production device, weakening the fluctuation of the overall hydrogen release rate of the hydrogen production device to achieve stable hydrogen supply, making the overall hydrogen release rate of the hydrogen production device stable, promoting the utilization of hydrogen storage materials in the decay stage, improving the utilization rate of hydrogen storage materials, and reducing costs.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: modifying the technical solutions recorded in the foregoing embodiments, or equivalently replacing some or all of the technical features therein, does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A modular hydrogen production device based on hydrolysis reaction, characterized in that, Comprising: A reactor housing (1), a temperature measuring unit (6), a water supply unit (10), a control unit (13), and a plurality of reaction units (2) arranged within the reactor housing (1); The reaction unit (2) has a physical partition layer (4) for placing a hydrogen storage material therein; water inlets and air outlets (3) are respectively provided on the physical partition layer (4); The temperature measuring unit (6) includes: a plurality of temperature measuring probes (5); The water supply unit (10) includes: a plurality of water outlet pipes (9); Each group of temperature measuring probes (5) and water outlet pipes (9) extend into the corresponding physical partition layer (4) from the water inlets; The control valves of the temperature measuring probes (5) and the water outlet pipes (9) are respectively in signal connection with the control unit (13).

2. The modular hydrogen production device based on hydrolysis reaction according to claim 1, wherein Further comprising: A heat extraction unit (12); The heat extraction unit (12) includes: a pump (11); The heat exchange pipeline connected to the pump (11) extends into the reactor housing (1); The pump (11) is in signal connection with the control unit (13).

3. The modular hydrogen production device based on hydrolysis reaction according to claim 1, characterized in that, Further comprising: A pressure measuring unit (8); The pressure measuring unit (8) includes: a pressure sensor (7); The probe of the pressure sensor (7) extends into the reactor housing (1); The pressure sensor (7) is in signal connection with the control unit (13).

4. The modular hydrogen production device based on hydrolysis reaction according to claim 1, characterized in that, A hydrogen outlet (15) is provided on the reactor housing (1).

5. The modular hydrogen production device based on hydrolysis reaction according to claim 4, characterized in that, An exhaust valve (14) is installed at the hydrogen outlet (15), and the exhaust valve (14) is in signal connection with the control unit (13).

6. The modular hydrogen production device based on hydrolysis reaction according to claim 1, characterized in that, The air outlet (3) is provided with a filter net (16).

7. The modular hydrogen production device based on hydrolysis reaction according to claim 1, characterized in that, The reactor housing (1) is made of a metal material housing.

8. The modular hydrogen production device based on hydrolysis reaction according to claim 1, characterized in that, The physical partition layer (4) is made of a thin-walled stainless steel box or an aluminum foil bag.

9. The modular hydrogen production device based on hydrolysis reaction according to claim 1, wherein, A screw thread (17) is provided at the water inlet of the physical partition layer (4); The temperature measuring probes (5) and the water outlet pipes (9) are installed in a telescopic pipe (18), and the telescopic pipe (18) is connected to one end of a quick connector (20) through a locking device (19); The other end of the quick connector (20) is docked with the screw thread (17).

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