Solid hydrogen storage and charging waste heat utilization system of hydrogen production station

Abstract

The utility model relates to a solid hydrogen storage and charging waste heat utilization system of a hydrogen production station. The solid hydrogen storage and charging waste heat utilization system comprises a magnesium-based solid hydrogen storage and charging device, an electric heater, a first circulating pump, an alkaline water electrolysis hydrogen production device, a second circulating pump and a heat exchanger, the magnesium-based solid hydrogen storage and charging device, the electric heater, the first circulating pump, the alkaline water electrolysis hydrogen production device, the second circulating pump and the heat exchanger form a first heat supply loop; and the alkaline water electrolysis hydrogen production device, the second circulating pump and the heat exchanger form a heat exchange loop. The system can make full use of waste heat generated in the hydrogen charging process of the solid hydrogen storage and charging device, can maintain the hot standby state of the alkaline water electrolysis hydrogen production device, ensures quick starting and working of the alkaline water electrolysis hydrogen production device, and reduces energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat utilization, in particular to a solid-state hydrogen storage and hydrogen filling waste heat utilization system of a hydrogen production station. Background Art

[0002] As a regional flexible regulation resource, hydrogen energy has the capabilities of long-term cross-seasonal energy storage and two-way flexible regulation, and has broad prospects in my country's new energy-rich regions. At present, renewable energy sources such as wind power and photovoltaics will usher in rapid growth, and renewable energy will gradually replace traditional fossil energy to occupy a dominant position in the energy field. With the large scale of hydrogen energy integration projects supporting renewable energy, water electrolysis hydrogen production technology is one of the most promising and mature technologies in large-scale hydrogen production. Among them, the overall process maturity of alkaline water electrolysis hydrogen production technology is high, and it has entered the stage of large-scale bidding and implementation.

[0003] The solid-state hydrogen storage and charging device of the hydrogen production station can generate a large amount of waste heat when storing hydrogen. If the waste heat is not utilized, it will cause a lot of waste. In addition, in the process of electrolyzing water to produce hydrogen, the operating temperature of the electrolysis device is a very important process parameter. Too high a temperature will not only increase the amount of electrolyte carried away by the electrolyzed gas, but also accelerate the corrosion of the equipment and reduce the life of the equipment. Too low a temperature will affect the circulation speed of the electrolyte, and the current size will not be easy to increase, resulting in reduced gas production and increased energy consumption. Generally, the temperature of the alkaline electrolysis device is maintained in the range of 85℃~90℃, but it is affected by the geographical location and load conditions. , the problem of photovoltaic and wind power consumption in the northern region is prominent, and power generation is unstable. In the severe cold environment of the north in winter, the temperature drop will reduce the electrolysis efficiency; especially at night, the photovoltaic station does not generate electricity, the electrolysis device stops working, and the hydrogen production equipment has planned or temporary shutdowns. After the shutdown, the temperature of the electrolysis device will gradually drop. When restarting, the heat engine must be used first to make the temperature of the electrolysis device reach the allowable range before it can start working. The heat engine process will cause additional energy consumption and waste of time. Therefore, how to use the waste heat generated when the magnesium-based solid-state hydrogen storage device is charged with hydrogen in the water electrolysis hydrogen production device is a problem that needs to be solved. Utility Model Content

[0004] The utility model provides a solid-state hydrogen storage and hydrogen charging waste heat utilization system, which can fully utilize the waste heat generated during the hydrogen charging process of the solid-state hydrogen storage and hydrogen charging device, and can also maintain the electrolyte temperature of its alkaline water electrolysis hydrogen production device in a standby state, so that the alkaline water electrolysis hydrogen production device thermal engine starts faster.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A solid-state hydrogen storage and hydrogen charging waste heat utilization system for a hydrogen production station, comprising a magnesium-based solid-state hydrogen storage and hydrogen charging device, an electric heater, a first circulation pump, an alkaline water electrolysis hydrogen production device, a second circulation pump and a heat exchanger;

[0007] The heat exchange medium outlet of the solid-state hydrogen storage and charging device is communicated with the first inlet of the electric heater, the first outlet of the electric heater is communicated with the heat exchange medium inlet of the heat exchanger, the heat exchange medium outlet of the heat exchanger is communicated with the heat exchange medium outlet of the first circulation pump, the heat exchange medium outlet of the first circulation pump is communicated with the second inlet of the electric heater, and the second outlet of the electric heater is communicated with the heat exchange medium inlet of the solid-state hydrogen storage and charging device;

[0008] The alkali solution outlet of the alkaline water electrolysis hydrogen production device is connected to the liquid inlet of the second circulation pump, the liquid outlet of the second circulation pump is connected to the liquid inlet of the heat exchanger, and the liquid outlet of the heat exchanger is connected to the alkali solution inlet of the alkaline water electrolysis hydrogen production device.

[0009] Preferably, a first pipe is connected between the second outlet of the electric heater and the heat exchange medium inlet of the heat exchanger, a first electric regulating valve is arranged on the first pipe, a second pipe is connected between the second inlet of the electric heater and the heat exchange medium outlet of the heat exchanger, a first temperature sensor is arranged on the second pipe, and the first circulation pump is arranged on the second pipe.

[0010] Preferably, a third pipe is connected between the liquid outlet of the heat exchanger and the alkaline solution inlet of the alkaline water electrolysis hydrogen production device, and a first temperature sensor is arranged on the third pipe.

[0011] Preferably, a fourth pipe is connected between the alkali liquid outlet of the alkaline water electrolysis hydrogen production device and the liquid inlet of the heat exchanger, a first flow meter and a first control valve are arranged on the fourth pipe, and the second circulation pump is arranged on the fourth pipe.

[0012] Preferably, an air heat exchanger is also included, the first tube is connected to a fifth tube, the fifth tube is connected to the heat exchange medium inlet of the air heat exchanger, the heat exchange medium outlet of the air heat exchanger is connected to the second tube via a sixth tube, and the connection point between the sixth tube and the second tube is located at the liquid inlet of the first circulation pump; the air inlet and air outlet of the air heat exchanger are respectively connected to an air inlet pipe and an air outlet pipe.

[0013] Preferably, a third electric regulating valve is provided on the fifth pipe, and a fourth electric regulating valve is provided on the air inlet pipe.

[0014] Preferably, a main control valve is provided on the first pipe, the main control valve is provided at the second outlet of the electric heater, the first electric regulating valve is provided at the heat exchange medium inlet of the heat exchanger, and the fifth pipe is connected to the first pipe between the first electric regulating valve and the main control valve.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The waste heat generated by the magnesium-based solid-state hydrogen storage and charging device during the hydrogen charging process is utilized to avoid heat loss, and the waste heat taken away can be used to heat the electrolyte through a heat exchanger, so that it is always in a hot standby state, thereby accelerating the startup rate of the alkaline water electrolysis hydrogen production device and avoiding wasting extra electricity to heat the electrolyte to the operating temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Schematic diagram of the overall system of an embodiment of the present invention.

[0019] Description of reference numerals:

[0020] 1. Magnesium-based solid-state hydrogen storage and charging device; 2. Electric heater; 3. First circulation pump; 4. Alkaline water electrolysis hydrogen production device; 5. Second circulation pump; 6. Heat exchanger; 7. First pipe; 8. First electric regulating valve; 9. Second pipe; 10. First temperature sensor; 11. Third pipe; 12. Second temperature sensor; 13. First control valve; 14. First flow meter; 15. Air heat exchanger; 16. Fifth pipe; 17. Third electric regulating valve; 18. Air inlet pipe; 19. Air outlet pipe; 20. Fourth electric regulating valve; 21. Third temperature sensor; 22. Main control valve. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The magnesium-based solid-state hydrogen storage and charging device of the existing hydrogen production station is an exothermic process during the hydrogen charging process, which will generate waste heat. If it is not utilized, it will lead to heat loss and also affect the hydrogen charging rate. In addition, in various northern regions, the temperature in winter is affected by the geographical location and load conditions. The problem of photovoltaic and wind power consumption in the northern region is prominent. In the severe cold environment of the northern winter, the temperature drop will reduce the electrolysis efficiency, and the hydrogen production equipment itself has planned shutdowns or temporary shutdowns. After the shutdown, the temperature of the electrolyzer will gradually drop. When restarting, the heat engine must be performed first so that the electrolyzer temperature reaches the allowable range before it can start working. The heat engine process will cause additional power consumption and waste of time. Therefore, in order to ensure the stable electrolytic hydrogen production efficiency of the electrolyzer in the northern region in winter and utilize the waste heat generated by the solid-state hydrogen storage and charging device during the hydrogen charging process without wasting excess power, the embodiment of the utility model provides a solid-state hydrogen storage and hydrogen charging waste heat utilization system of a hydrogen production station to solve the above problems.

[0025] Specifically, Figure 1As shown, a solid-state hydrogen storage and hydrogen charging waste heat utilization system of a hydrogen production station includes a magnesium-based solid-state hydrogen storage and hydrogen charging device 1, an electric heater 2, a first circulating pump 3, an alkaline water electrolysis hydrogen production device 4, a second circulating pump 5 and a heat exchanger 6; wherein the heat exchange medium outlet of the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 is connected to the first inlet of the electric heater 2, the first outlet of the electric heater 2 is connected to the heat exchange medium inlet of the heat exchanger 6, the heat exchange medium outlet of the heat exchanger 6 is connected to the heat exchange medium inlet of the first circulating pump 3, the heat exchange medium outlet of the first circulating pump 3 is connected to the second inlet of the electric heater 2 The first circulating pump 3 is connected to the inlet of the magnesium-based solid-state hydrogen storage and charging device 1, and the second outlet of the electric heater 2 is connected to the heat exchange medium inlet of the magnesium-based solid-state hydrogen storage and charging device 1, so that the magnesium-based solid-state hydrogen storage and charging device 1, the electric heater 2, the first circulating pump 3, the alkaline water electrolysis hydrogen production device 4, the second circulating pump 5 and the heat exchanger 6 form a first heating circuit, and the heat exchange medium can be driven by the first circulating pump 3 to circulate in the first heating circuit; correspondingly, the alkali liquid outlet of the alkaline water electrolysis hydrogen production device 4 is connected to the liquid inlet of the second circulating pump 5, the liquid outlet of the second circulating pump 5 is connected to the liquid inlet of the heat exchanger 6, and the heat exchanger 6 The liquid outlet is connected to the alkali liquid inlet of the alkaline water electrolysis hydrogen production device 4. The alkaline water electrolysis hydrogen production device 4, the second circulation pump 5 and the heat exchanger 6 form a heat exchange loop, and the electrolyte is driven to circulate in the heat exchange loop by the second circulation pump 5; specifically, during the temporary shutdown or planned shutdown of the hydrogen production equipment in winter, the first circulation pump 3 and the second circulation pump 5 are started at the same time. The start of the first circulation pump 3 can drive the heat exchange medium to circulate in the first heat supply loop, and the heat exchange medium flows into the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 to take away the residual heat generated by the hydrogen charging in the device, and then Then it is sent to the heat exchanger 6, and at the same time, the second circulation pump 5 brings the electrolyte in the alkaline water electrolysis hydrogen production device 4 to the heat exchanger 6 for heat exchange with the heat exchange medium, so that the temperature of the electrolyte is maintained above 60°C, and then the electrolyte in this temperature range returns to the alkaline water electrolysis hydrogen production device 4, so that the temperature of the electrolyte in the alkaline water electrolysis hydrogen production device 4 is kept between 60°C and 65°C until the hydrogen production equipment is restarted. At this time, the alkaline water electrolysis hydrogen production device 4 can quickly enter normal electrolysis work, saving startup time and reducing hot standby startup energy consumption. The above process not only utilizes the waste heat generated by the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 during the hydrogen charging process to avoid heat loss, but also uses the waste heat taken away to heat the electrolyte through the heat exchanger 6 to keep it at the working temperature, so that it is always in a hot standby state, speeding up the startup rate of the alkaline water electrolysis hydrogen production device 4 and avoiding wasting extra electricity to heat the electrolyte to the working temperature.

[0026] Moreover, the hydrogen charging environment temperature of the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 is required. By taking away the waste heat through the heat exchange medium, the hydrogen charging environment temperature of the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 can be kept within the required range as much as possible, and the environment temperature will not be too high, so that the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 maintains a higher hydrogen charging rate; specifically, the function of the above-mentioned electric heater 2 is to make the temperature of the heat exchange medium in the initial heat supply circulation loop reach the required working temperature to ensure the normal hydrogen charging rate of the magnesium-based solid-state hydrogen storage and hydrogen charging device 1, and ensure the hydrogen charging rate of the magnesium-based solid-state hydrogen storage and hydrogen charging device 1; it should be noted that the electric heater 2 only works at the initial startup, and heats the heat exchange medium to the required working temperature for the normal hydrogen charging rate of the magnesium-based solid-state hydrogen storage and hydrogen charging device 1. It does not work at the rest of the time and is only used as a flow channel for the heat exchange medium; and in this embodiment, solid-state hydrogen storage adopts a magnesium-based alloy hydrogen storage process, and the temperature of the heat exchange medium reaches above 260°C through the electric heater 2 before hydrogen charging, so as to ensure that the magnesium-based solid-state hydrogen storage and hydrogen charging device 1 maintains a normal hydrogen charging rate. The specific heat exchange medium can be heat transfer oil.

[0027] Specifically, a first pipe 7 is connected between the second outlet of the electric heater 2 and the heat exchange medium inlet of the heat exchanger 6, a first electric regulating valve 8 is arranged on the first pipe 7, a second pipe 9 is connected between the second inlet of the electric heater 2 and the heat exchange medium outlet of the heat exchanger 6, a first temperature sensor 10 is arranged on the second pipe 9, and the first circulation pump 3 is arranged on the second pipe 9. The temperature of the heat exchange medium coming out of the heat exchanger 6 can be monitored by the first temperature sensor 10. If the temperature of the heat exchange medium is too low, the opening of the first electric regulating valve 8 and the operating frequency of the first circulation pump 3 can be reduced at the same time to reduce the flow rate, so as to reduce the magnesium-based solid-state hydrogen storage charge. The heat exchange medium coming out of the hydrogen device 1 can carry more heat. After heat exchange in the heat exchanger 6, the temperature increases slowly and finally reaches the working temperature of the magnesium-based solid-state hydrogen storage and charging device 1 at a normal hydrogen charging rate. Therefore, when the heat exchange medium enters the magnesium-based solid-state hydrogen storage and charging device 1 again, the temperature of the heat exchange medium can reach the working temperature of the magnesium-based solid-state hydrogen storage and charging device 1. Of course, if the temperature of the heat exchange medium is too high, then the opening of the first electric regulating valve 8 is increased and the working frequency of the first circulation pump 3 is increased at the same time, so that the temperature is gradually reduced and finally reaches the working temperature of the magnesium-based solid-state hydrogen storage and charging device 1 at a normal hydrogen charging rate.

[0028] Specifically, a third pipe 11 is connected between the liquid outlet of the heat exchanger 6 and the alkali liquid inlet of the alkaline water electrolysis hydrogen production device 4, and a second temperature sensor 12 is disposed on the third pipe 11. The second temperature sensor 12 is provided with a preset temperature range, that is, between 60°C and 65°C, which is the alkali liquid working temperature of the alkaline water electrolysis hydrogen production device 4 in the hot standby state. A fourth pipe is connected between the alkali liquid outlet of the alkaline water electrolysis hydrogen production device 4 and the liquid inlet of the heat exchanger 6, and a first flowmeter 14 and a first control valve 13 are disposed on the fourth pipe. The second circulation pump 5 is disposed in the fourth pipe. Thus, the opening of the first control valve 13 and the operating rate of the second circulation pump 5 can be further adjusted according to the temperature of the electrolyte coming out of the heat exchanger 6 monitored by the second temperature sensor 12, so that the temperature of the electrolyte reaches a preset temperature range, that is, if the temperature of the electrolyte is too high, greater than the preset temperature, then the opening of the first control valve 13 is increased and the operating rate of the second circulation pump 5 is accelerated at the same time; if the temperature of the electrolyte is too low, less than the preset temperature, then the opening of the first control valve 13 is reduced and the operating rate of the second circulation pump 5 is reduced at the same time.

[0029] Preferably, during the normal operation of the alkaline water electrolysis hydrogen production device 4, the electrolyte therein is at a normal temperature after cooling and heat exchange, and no external heat exchange is required. At this time, the heat exchanger 6 does not work. In order to utilize the waste heat generated by the magnesium-based solid-state hydrogen storage and charging device 1, the system also includes an air heat exchanger 15, wherein the first tube 7 is connected to a fifth tube 16, the fifth tube 16 is connected to the heat exchange medium inlet of the air heat exchanger 15, the heat exchange medium outlet of the air heat exchanger 15 is connected to the second tube 9 by a sixth tube, and the connection point between the sixth tube and the second tube 9 is located at the first tube 7. At the liquid inlet of the first circulation pump 3, the air inlet and the air outlet of the air heat exchanger 15 are respectively connected with the air inlet pipe 18 and the air outlet pipe 19, that is, the air heat exchanger 15, the first circulation pump 3 and the magnesium-based solid hydrogen storage and charging device 1 form a second heat supply circuit, and the heat exchange medium is circulated by the first circulation pump 3, and the waste heat carried by the heat exchange medium enters the air heat exchanger 15 through the fifth pipe 16, and exchanges heat with the air in the air heat exchanger 15, which can be used to heat the external or internal circulation air, and then the heated air enters the hydrogen production workshop or other The production office area meets the heating demand, and then the heat exchange medium after heat exchange returns to the second pipe 9 through the sixth pipe, and then circulates again; preferably, a third electric regulating valve 17 is provided on the fifth pipe 16, a fourth electric regulating valve 20 is provided on the air inlet pipe 18, and a third temperature sensor 21 is provided on the air outlet pipe 19. The user monitors the air temperature after heat exchange through the third temperature sensor 21, and then further adjusts the working frequency of the first circulation pump 3 and the opening of the third electric regulating valve 17 and the fourth electric regulating valve 20 according to the demand, so as to adjust the temperature at the air outlet pipe 19 to the target temperature. Of course, in this process, if the temperature of the heat exchange medium monitored by the first temperature sensor 10 is too low, the opening of the third electric regulating valve 17 and the working frequency of the first circulation pump 3 are reduced at the same time. If the temperature of the heat exchange medium monitored by the first temperature sensor 10 is too high, the opening of the third electric regulating valve 17 is increased and the working frequency of the first circulation pump 3 is accelerated. The temperature feedback value monitored by the third temperature sensor 21 can also be achieved by adjusting the opening of the fourth electric regulating valve 20.

[0030] Preferably, a main control valve 22 is provided on the first pipe 7, and the main control valve 22 is provided at the second outlet of the electric heater 2. The first electric regulating valve 8 is provided at the heat exchange medium inlet of the heat exchanger 6. The fifth pipe 16 is connected to the first pipe 7 between the first electric regulating valve 8 and the main control valve 22, and the external circulation amount of the heat exchange medium can be controlled by the main control valve 22.

[0031] When the magnesium-based solid-state hydrogen storage and charging device 1 is in the initial startup stage, the main control valve 22 is closed, the external circulation bypass of the heat exchange medium is cut off, and the magnesium-based solid-state hydrogen storage and charging device 1 is guaranteed to reach the required working temperature. In the normal hydrogen charging process, the main control valve 22 is opened, and the heat exchange medium circulation is used to timely remove the waste heat generated in the hydrogen charging process. When the alkaline water electrolysis hydrogen production device 4 is in a shutdown state, the first electric regulating valve 8, the first control valve 13 and the second circulation pump 5 are adjusted to heat the electrolyte of the alkaline water electrolysis hydrogen production device 4 to ensure the hot standby startup working temperature; when the alkaline water electrolysis hydrogen production device 4 is working normally, the third electric regulating valve 17 and the fourth electric regulating valve 20 are adjusted to meet the heating needs of the hydrogen production workshop or production office area.

[0032] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A solid-state hydrogen storage and hydrogen filling waste heat utilization system for a hydrogen production station, characterized in that: It includes a magnesium-based solid-state hydrogen storage and charging device, an electric heater, a first circulation pump, an alkaline water electrolysis hydrogen production device, a second circulation pump and a heat exchanger; The heat exchange medium outlet of the solid-state hydrogen storage and charging device is communicated with the first inlet of the electric heater, the first outlet of the electric heater is communicated with the heat exchange medium inlet of the heat exchanger, the heat exchange medium outlet of the heat exchanger is communicated with the heat exchange medium outlet of the first circulation pump, the heat exchange medium outlet of the first circulation pump is communicated with the second inlet of the electric heater, and the second outlet of the electric heater is communicated with the heat exchange medium inlet of the solid-state hydrogen storage and charging device; The alkali solution outlet of the alkaline water electrolysis hydrogen production device is connected to the liquid inlet of the second circulation pump, the liquid outlet of the second circulation pump is connected to the liquid inlet of the heat exchanger, and the liquid outlet of the heat exchanger is connected to the alkali solution inlet of the alkaline water electrolysis hydrogen production device.

2. The solid-state hydrogen storage and hydrogen charging waste heat utilization system according to claim 1 is characterized in that: A first pipe is connected between the second outlet of the electric heater and the heat exchange medium inlet of the heat exchanger, and a first electric regulating valve is arranged on the first pipe. A second pipe is connected between the second inlet of the electric heater and the heat exchange medium outlet of the heat exchanger, and a first temperature sensor is arranged on the second pipe. The first circulation pump is arranged on the second pipe.

3. The solid-state hydrogen storage and hydrogen charging waste heat utilization system according to claim 1 is characterized in that: A third pipe is connected between the liquid outlet of the heat exchanger and the alkaline solution inlet of the alkaline water electrolysis hydrogen production device, and a first temperature sensor is arranged on the third pipe.

4. The solid-state hydrogen storage and hydrogen charging waste heat utilization system according to claim 2 is characterized in that: A fourth pipe is connected between the alkali liquid outlet of the alkaline water electrolysis hydrogen production device and the liquid inlet of the heat exchanger. A first flow meter and a first control valve are arranged on the fourth pipe. The second circulation pump is arranged on the fourth pipe.

5. The solid-state hydrogen storage and hydrogen charging waste heat utilization system according to claim 2 is characterized in that: It also includes an air heat exchanger, wherein the first tube is connected to a fifth tube, the fifth tube is connected to a heat exchange medium inlet of the air heat exchanger, the heat exchange medium outlet of the air heat exchanger is connected to the second tube via a sixth tube, and the connection point between the sixth tube and the second tube is located at the liquid inlet of the first circulation pump; the air inlet and air outlet of the air heat exchanger are respectively connected to an air inlet pipe and an air outlet pipe.

6. The solid-state hydrogen storage and hydrogen charging waste heat utilization system according to claim 5 is characterized in that: The fifth pipe is provided with a third electric regulating valve, and the air inlet pipe is provided with a fourth electric regulating valve.

7. The solid-state hydrogen storage and hydrogen charging waste heat utilization system according to claim 5 is characterized in that: A main control valve is provided on the first pipe, and the main control valve is provided at the second outlet of the electric heater. The first electric regulating valve is provided at the heat exchange medium inlet of the heat exchanger. The fifth pipe is connected to the first pipe between the first electric regulating valve and the main control valve.

Images