Built-in heat exchange type solid metal hydrogen storage device and application method

Abstract

The invention discloses a built-in heat exchange type solid metal hydrogen storage device and an application method, and relates to the technical field of hydrogen storage equipment, in particular to a built-in heat exchange type solid metal hydrogen storage device which comprises a tank body, a double-circulation liquid component, a temperature control component and a hydrogen storage component, and the hydrogen storage component comprises a hydrogen storage alloy element, two supporting frames and a plurality of positioning rods; according to the built-in heat exchange type solid metal hydrogen storage device and the application method, the tank body, the double-circulation liquid component, the temperature control component and the hydrogen storage component are arranged in a matched mode, so that the built-in heat exchange type solid metal hydrogen storage device and the application method have the effects of efficient hydrogen storage and efficient hydrogen desorption; heat generated in the hydrogen storage process can be quickly led out or heat needed in the hydrogen desorption process can be quickly led in, and the temperature in the hydrogen storage tank is effectively controlled. Compared with the prior art, the hydrogen storage device has the advantages that the heat exchange efficiency is obviously improved, the hydrogen storage and hydrogen desorption processes can be completed in a shorter time, and the working efficiency of the hydrogen storage device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage equipment, and specifically to an internally heat-exchanging solid metal hydrogen storage device and an application method thereof. Background Art

[0002] With the progress of modern society and the development of the economy, the demand for energy is increasing day by day. Traditional fossil fuels represented by oil, coal, and natural gas are non-renewable energy sources and are facing the dilemma of gradual depletion. Hydrogen energy has attracted extensive attention from researchers and investors around the world because of its high combustion calorific value, zero emissions, and its ability to serve as a carrier for high-density energy storage. There are mainly three ways to store hydrogen: high-pressure gaseous hydrogen storage, liquid hydrogen storage, and solid hydrogen storage. The main disadvantages of high-pressure gaseous hydrogen storage are its low hydrogen storage density and significant safety hazards; although liquid hydrogen has a relatively high hydrogen storage density, the energy consumed during the liquefaction process of hydrogen is very large. The energy consumed for hydrogen liquefaction (21K) is equivalent to one-third of the energy of the liquefied hydrogen, and there are also safety problems caused by the vaporization of liquid hydrogen; while storing hydrogen using solid hydrogen storage materials has advantages such as a relatively large hydrogen storage density and being safe and efficient. Therefore, solid hydrogen storage has become the most active hydrogen storage technology in current hydrogen energy research.

[0003] Solid hydrogen storage materials represented by metal hydrides not only generate heat during hydrogen absorption and desorption, but also expand and contract. The stress will impact the internal structure of the tank. Therefore, if the hydrogen storage materials are not evenly dispersed, stress concentration will damage the internal structure of the tank. For example, the patent with the patent number CN111188988B discloses a solid hydrogen storage device with high heat exchange characteristics. This device solves the problem of stress concentration damaging the internal structure of the tank by arranging multiple hydrogen storage cylinders and heat conduction partitions to make the hydrogen storage materials evenly distributed. At the same time, by arranging structures such as heat transfer fins, the heat dissipation efficiency is improved. However, this device still has certain limitations in practical applications. Its heat exchange efficiency still needs to be further improved, and its ability to precisely control the temperature during the hydrogen storage process is insufficient, making it difficult to meet some application scenarios with high temperature requirements during the hydrogen storage process. Summary of the Invention

[0004] (I) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides an internally heat-exchanging solid metal hydrogen storage device and an application method thereof, which solve the problems raised in the above background art.

[0005] (II) Technical Solutions To achieve the above object, the present invention is realized through the following technical solutions: An internally heat-exchanging solid-state metal hydrogen storage device, comprising a tank body, a double-cycle liquid component, a temperature control component, and a hydrogen storage component. The hydrogen storage component includes a hydrogen storage alloy element, two support frames, and a plurality of positioning rods. Each of the support frames is fixedly installed on the inner side wall of the tank body. The two ends of each positioning rod are respectively fixedly installed with the two support frames, and the positioning rods are parallel to each other. The hydrogen storage alloy element is fixedly installed on each positioning rod. The double-cycle liquid component includes a heat exchange coil, a first conveying assembly, and a second conveying assembly. The heat exchange coil is fixedly installed on the inner side wall of the tank body. The medium outflow end of the first conveying assembly is communicated with the medium inflow end of the heat exchange coil, and the medium inflow end of the first conveying assembly is communicated with the medium outflow end of the heat exchange coil. The medium outflow end of the second conveying assembly is communicated with the medium inflow end of the heat exchange coil, and the medium inflow end of the second conveying assembly is communicated with the medium outflow end of the heat exchange coil. The first conveying assembly and the second conveying assembly respectively convey fluid media into the heat exchange coil. The temperature control component is respectively connected to the first conveying assembly and the second conveying assembly for control. The temperature control component respectively controls the rise and fall of the temperature of the fluid media inside the first conveying assembly and the second conveying assembly. When the first conveying assembly conveys a low-temperature fluid medium into the heat exchange coil, the low-temperature fluid medium absorbs the heat inside the tank body, reducing the temperature and pressure inside the tank body. When the second conveying assembly conveys a high-temperature fluid medium into the heat exchange coil, the high-temperature fluid medium transfers heat to the inside of the tank body, increasing the temperature and pressure inside the tank body.

[0006] Optionally, one end of the tank body is fixedly installed with a tank flange, and a quick-opening blind plate is fixedly installed on the tank flange. A pressure gauge is fixedly installed on the tank body. The other end of the tank body is fixedly installed with and communicated with a hydrogen inlet and outlet pipe.

[0007] Optionally, the first conveying assembly includes a cold liquid tank, a condenser, and a first conveying pump. The condenser is fixedly installed on the cold liquid tank, and the condenser cools the fluid medium in the cold liquid tank. The medium inflow end of the cold liquid tank is communicated with the medium outflow end of the heat exchange coil. The medium outflow end of the cold liquid tank is fixedly installed and communicated with the medium inflow end of the first conveying pump, and the medium outflow end of the first conveying pump is communicated with the medium inflow end of the heat exchange coil. The second conveying assembly includes a hot liquid tank, a heater, and a second conveying pump. The heater is fixedly installed on the hot liquid tank, and the heater heats the fluid medium in the hot liquid tank. The medium inflow end of the hot liquid tank is communicated with the medium outflow end of the heat exchange coil. The medium outflow end of the hot liquid tank is fixedly installed and communicated with the medium inflow end of the second conveying pump, and the medium outflow end of the second conveying pump is communicated with the medium inflow end of the heat exchange coil.

[0008] Optionally, the temperature control component includes a control unit, a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is fixedly installed inside the tank body, the second temperature sensor is fixedly installed inside the cold liquid tank, and the third temperature sensor is fixedly installed inside the hot liquid tank.

[0009] Optionally, the control unit adopts a programmable logic controller, and the programmable logic controller is electrically connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the first delivery pump, the condenser, the second delivery pump, and the heater respectively.

[0010] Optionally, the control unit includes a first temperature controller, a second temperature controller, and a third temperature controller. The first temperature controller is electrically connected to the first temperature sensor, the first delivery pump, and the second delivery pump respectively; the second temperature controller is electrically connected to the second temperature sensor and the condenser respectively; the third temperature controller is electrically connected to the third temperature sensor and the heater respectively.

[0011] An application method of an internal heat exchange type solid metal hydrogen storage device includes the following steps: Step 1, temperature control: Detect the temperature inside the tank body through the first temperature sensor, and the first temperature sensor transmits the detected temperature signal to the control unit.

[0012] The temperature control component controls the temperature of the fluid medium in the cold liquid tank to be between 15 and 25 °C; when the temperature of the fluid medium in the cold liquid tank is higher than 25 °C, the control unit controls to start the condenser, and when the temperature of the fluid medium in the cold liquid tank is lower than 15 °C, the control unit controls to turn off the condenser.

[0013] The temperature control component controls the temperature of the fluid medium in the hot liquid tank to be between 50 and 60 °C; when the temperature of the fluid medium in the hot liquid tank is lower than 50 °C, the control unit controls to start the heater, and when the temperature of the fluid medium in the hot liquid tank is higher than 60 °C, the control unit controls to turn off the heater.

[0014] Step 2, inspect the airtightness of the tank body: After closing the quick-opening blind flange, introduce nitrogen at 5 MPa into the tank body and maintain the pressure for 6 hours. If the pressure in the tank body does not drop by more than 0.02 MPa after 6 hours, it proves that the airtightness of the tank body is qualified.

[0015] Step 3, during hydrogen storage: Fill hydrogen into the tank body through the hydrogen inlet and outlet pipe, and control the pressure inside the tank body to be 5 MPa; when the temperature inside the tank body exceeds 30 °C, the temperature control component controls to start the first delivery pump, and the first delivery pump transports the low-temperature fluid medium in the cold liquid tank to the heat exchange coil. The low-temperature fluid medium absorbs heat during the flow in the heat exchange coil, and the temperature inside the tank body decreases; after the temperature and pressure inside the tank body no longer change, stop filling hydrogen, and the temperature control component controls to turn off the first delivery pump.

[0016] Step 4: When releasing hydrogen: Release the hydrogen inside the tank through the hydrogen inlet and outlet pipe. When the pressure inside the tank is lower than 1 MPa, control and start the second transfer pump through the temperature control component. The second transfer pump transports the high-temperature fluid medium in the hot liquid tank to the heat exchange coil. The high-temperature fluid medium releases heat during the flow in the heat exchange coil, and the temperature inside the tank increases. When the pressure inside the tank is lower than atmospheric pressure, the hydrogen release is completed, and the temperature control component controls to turn off the second transfer pump.

[0017] (III) Beneficial effects The present invention provides a built-in heat exchange type solid metal hydrogen storage device and an application method, which have the following beneficial effects: 1. The built-in heat exchange type solid metal hydrogen storage device and the application method, through the coordinated setting of the tank body, the double-cycle liquid component, the temperature control component, and the hydrogen storage component, enable the built-in heat exchange type solid metal hydrogen storage device and the application method to have the effects of efficient hydrogen storage and efficient hydrogen release. By setting the built-in heat exchange coil and the double-cycle liquid component, the heat generated during the hydrogen storage process can be quickly exported, or the heat required during the hydrogen release process can be imported, effectively controlling the temperature inside the hydrogen storage tank. The heat released during the hydrogen storage process is quickly exported, and the hydrogen release process is preheated in advance, accelerating the hydrogen release. Compared with the prior art, the heat exchange efficiency of the present invention is significantly improved, and the hydrogen storage and hydrogen release processes can be completed in a shorter time, greatly improving the working efficiency of the hydrogen storage device. For example, during the hydrogen storage process, when the temperature inside the tank exceeds the set value, the temperature control component can quickly start the first transfer pump, transport the low-temperature fluid medium in the cold liquid tank to the heat exchange coil, quickly absorb the heat inside the tank, and rapidly reduce the temperature, avoiding problems such as the decline in the performance of the hydrogen storage alloy caused by too high temperature, thus ensuring the efficient progress of the hydrogen storage process. During the hydrogen release process, by transporting the high-temperature fluid medium in the hot liquid tank to the heat exchange coil through the second transfer pump, the temperature inside the tank can be quickly increased, promoting the release of hydrogen and improving the hydrogen release efficiency. This efficient heat exchange method enables the hydrogen storage device to better adapt to different working environments and requirements and has a wider application prospect.

[0018] 2. The built-in heat exchange type solid metal hydrogen storage device and its application method, through the cooperative setting of the tank body, double-cycle liquid components, temperature control components, and hydrogen storage components, enable the built-in heat exchange type solid metal hydrogen storage device and its application method to have the effect of precise temperature control. Through multiple temperature sensors and controllers in the temperature control components, the present invention can monitor the temperature inside the tank body, as well as in the cold liquid tank and the hot liquid tank in real time, and precisely control the temperature of the fluid medium as needed. This precise temperature control ability enables the hydrogen storage device to perform hydrogen storage and hydrogen release operations under the optimal temperature conditions, improving the service life and hydrogen storage efficiency of the hydrogen storage alloy. For example, the first temperature sensor can monitor the temperature inside the tank body in real time and transmit the signal to the control component. The control component precisely controls the start and stop of the first delivery pump and the second delivery pump according to the set temperature range, thereby realizing precise control of the temperature inside the tank body. At the same time, the second temperature sensor and the third temperature sensor respectively monitor the temperatures in the cold liquid tank and the hot liquid tank, and control the start and stop of the condenser and the heater through the second temperature controller and the third temperature controller to ensure that the temperature of the fluid medium in the cold liquid tank and the hot liquid tank always remains within the set range. This precise temperature control system can not only ensure the safety and reliability of the hydrogen storage process, but also flexibly adjust the temperature control strategy according to different hydrogen storage alloy materials and working requirements, further improving the performance and adaptability of the hydrogen storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0020] Figure 1 It is a partial cross-sectional structural schematic diagram of a built-in heat exchange type solid metal hydrogen storage device of the present invention; Figure 2 It is a cross-sectional view ( Figure 1 A-A in the figure) structural schematic diagram of a built-in heat exchange type solid metal hydrogen storage device of the present invention; Figure 3 It is a structural schematic diagram of the pipeline connection of the temperature control components and the double-cycle liquid components in a built-in heat exchange type solid metal hydrogen storage device of the present invention.

[0021] In the figure: 1. Quick-opening blind flange; 2. Tank flange; 3. Support frame; 4. Fastening bolt; 5. Positioning rod; 6. Heat exchange coil; 7. Double-circulation liquid component; 701. First three-way valve; 702. First check valve; 703. Second check valve; 704. First transfer pump; 705. Second transfer pump; 706. Cold liquid tank; 707. Condenser; 708. Hot liquid tank; 709. Heater; 710. Third check valve; 711. Fourth check valve; 712. Second three-way valve; 8. Pressure gauge; 9. Temperature control component; 901. First temperature controller; 902. First temperature sensor; 903. Second temperature controller; 904. Second temperature sensor; 905. Third temperature controller; 906. Third temperature sensor; 10. Liquid inlet; 11. Liquid outlet; 12. Tank body; 13. Hydrogen storage alloy element; 14. Hydrogen inlet and outlet pipe; 15. Support seat. Detailed implementation mode

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Please refer to Figures 1 to 3The present invention provides a technical solution: an internal heat exchange solid metal hydrogen storage device, comprising a tank body 12, a double circulation liquid component 7, a temperature control component 9, and a hydrogen storage component, wherein the hydrogen storage component comprises a hydrogen storage alloy element 13, two support frames 3, and a plurality of positioning rods 5, each support frame 3 is fixedly mounted on the inner side wall of the tank body 12, and both ends of the positioning rod 5 are respectively fixedly mounted on the two support frames 3, specifically, the positioning rod 5 is fixedly mounted on the support frame 3 by fastening bolts 4. Each positioning rod 5 is parallel to each other, and the hydrogen storage alloy element 13 is fixedly mounted on each positioning rod 5.

[0025] The hydrogen storage alloy element 13 is used to absorb and release hydrogen, and is mainly made of hydrogen storage alloy and high molecular polymer (such as PVP, etc.) and has good hydrogen storage performance and mechanical strength. The support frame 3 and the positioning rod 5 are used to support and fix the hydrogen storage alloy element 13 to avoid structural damage caused by stress concentration, thereby improving the safety and reliability of the hydrogen storage device.

[0026] The double circulation liquid component 7 includes a heat exchange coil 6, a first conveying assembly, and a second conveying assembly. The heat exchange coil 6 is fixedly mounted on the inner wall of the tank body 12. The medium outflow end of the first conveying assembly is connected to the medium inflow end of the heat exchange coil 6, and the medium inflow end of the first conveying assembly is connected to the medium outflow end of the heat exchange coil 6. The medium outflow end of the second conveying assembly is connected to the medium inflow end of the heat exchange coil 6, and the medium inflow end of the second conveying assembly is connected to the medium outflow end of the heat exchange coil 6; the first conveying assembly and the second conveying assembly convey fluid medium into the heat exchange coil 6 respectively.

[0027] The temperature control component 9 is respectively connected to the first conveying component and the second conveying component for controlling the temperature of the fluid medium inside the first conveying component and the second conveying component. The temperature control component 9 controls the temperature rise and fall of the fluid medium inside the first conveying component and the second conveying component.

[0028] When the first conveying component conveys the low-temperature fluid medium into the heat exchange coil 6, the low-temperature fluid medium absorbs the heat inside the tank body 12, reduces the temperature and pressure inside the tank body 12, avoids the problem of performance degradation of the hydrogen storage alloy due to excessive temperature, and thus ensures the efficient implementation of the hydrogen storage process.

[0029] When the second conveying component conveys the high-temperature fluid medium into the heat exchange coil 6, the high-temperature fluid medium transfers heat to the inside of the tank body 12, increases the temperature and pressure inside the tank body 12, promotes the release of hydrogen, and improves the hydrogen release efficiency.

[0030] The tank body 12 is used to contain the hydrogen storage alloy element 13 and hydrogen. The heat exchange coil 6 is used to perform heat exchange on the internal temperature of the tank body 12 through a fluid medium, thereby controlling the internal temperature of the tank body 12.

[0031] Specifically, one end of the tank body 12 is fixedly installed with a tank flange 2, and a quick-opening blind plate 1 is fixedly installed on the tank flange 2. A pressure gauge 8 is fixedly installed on the tank body 12; the other end of the tank body 12 is fixedly installed with a hydrogen inlet and outlet pipe 14 and the two are communicated.

[0032] Among them, the pressure gauge 8 is used to monitor the pressure inside the tank body 12, can accurately reflect the pressure change inside the tank body 12, and provides an important basis for the safety control of the hydrogen storage process. Through the monitoring of the pressure gauge 8, the operator can timely discover abnormal pressure conditions and take corresponding measures to ensure the safe operation of the hydrogen storage device. The quick-opening blind plate 1 is used to realize the quick sealing and opening of the tank body 12. A fluororubber sealing ring is used for sealing between the quick-opening blind plate 1 and the tank flange 2, and the sealing connection is realized through a mechanical structure. The design of the quick-opening blind plate 1 makes the maintenance and overhaul of the hydrogen storage device more convenient and fast, improving the operability and maintenance efficiency of the device. The hydrogen inlet and outlet pipe 14 is used to fill or discharge hydrogen into the tank body 12. By controlling the valve of the hydrogen inlet and outlet pipe 14, the charging and discharging of hydrogen can be realized. During the hydrogen storage process, hydrogen is filled into the tank body 12 through the hydrogen inlet and outlet pipe 14, and when the pressure inside the tank body 12 reaches the set value, the hydrogen filling is stopped. During the hydrogen discharging process, the hydrogen inside the tank body 12 is discharged through the hydrogen inlet and outlet pipe 14, and when the pressure inside the tank body 12 is lower than the set value, the hydrogen discharging is stopped.

[0033] Specifically, the first conveying component includes a cold liquid tank 706, a condenser 707, and a first conveying pump 704. The condenser 707 is fixedly installed on the cold liquid tank 706. The condenser 707 cools the fluid medium in the cold liquid tank 706. The medium inflow end of the cold liquid tank 706 is communicated with the medium outflow end of the heat exchange coil 6. The medium outflow end of the cold liquid tank 706 is fixedly installed and communicated with the medium inflow end of the first conveying pump 704. The medium outflow end of the first conveying pump 704 is communicated with the medium inflow end of the heat exchange coil 6; the second conveying component includes a hot liquid tank 708, a heater 709, and a second conveying pump 705. The heater 709 is fixedly installed on the hot liquid tank 708. The heater 709 heats the fluid medium in the hot liquid tank 708; the medium inflow end of the hot liquid tank 708 is communicated with the medium outflow end of the heat exchange coil 6. The medium outflow end of the hot liquid tank 708 is fixedly installed and communicated with the medium inflow end of the second conveying pump 705. The medium outflow end of the second conveying pump 705 is communicated with the medium inflow end of the heat exchange coil 6.

[0034] Among them, the fluid medium in the cold liquid tank 706 is cooled by the condenser 707 to ensure that its temperature always remains within the set range. The condenser 707 includes, but is not limited to, using equipment currently on the market for cooling fluid media. When the temperature inside the tank body 12 is too high, the first delivery pump 704 is started to deliver the low-temperature fluid medium in the cold liquid tank 706 to the heat exchange coil 6. The fluid medium absorbs the heat inside the tank body 12 during the flow in the heat exchange coil 6, thereby reducing the temperature inside the tank body 12. The second delivery assembly is used to deliver the high-temperature fluid medium to the heat exchange coil 6 to increase the temperature inside the tank body 12. The fluid medium in the hot liquid tank 708 is heated by the heater 709 to ensure that its temperature always remains within the set range. When hydrogen needs to be released, the pressure inside the tank body 12 decreases, and the second delivery pump 705 is started to deliver the high-temperature fluid medium in the hot liquid tank 708 to the heat exchange coil 6. The fluid medium releases heat during the flow in the heat exchange coil 6, thereby increasing the temperature inside the tank body 12 and promoting the release of hydrogen.

[0035] Further specifically, the temperature control component 9 includes a control element, a first temperature sensor 902, a second temperature sensor 904, and a third temperature sensor 906. The first temperature sensor 902 is fixedly installed inside the tank body 12, the second temperature sensor 904 is fixedly installed inside the cold liquid tank 706, and the third temperature sensor 906 is fixedly installed inside the hot liquid tank 708. The control element uses a programmable logic controller, and the programmable logic controller is electrically connected to the first temperature sensor 902, the second temperature sensor 904, the third temperature sensor 906, the first delivery pump 704, the condenser 707, the second delivery pump 705, and the heater 709, including communication connection.

[0036] Among them, the first temperature sensor 902 is used to monitor the temperature inside the tank body 12 in real time and transmit the signal to the control element. The second temperature sensor 904 is used to monitor the temperature of the fluid medium in the cold liquid tank 706 and transmit the signal to the control element. The third temperature sensor 906 is used to monitor the temperature of the fluid medium in the hot liquid tank 708 and transmit the signal to the control element. The control element accurately controls the start and stop of the first delivery pump 704, the second delivery pump 705, the condenser 707, and the heater 709 according to the signals fed back by each temperature sensor, thereby realizing the accurate control of the temperature inside the tank body 12. For example, according to the signal of the second temperature sensor 904, the control element controls the start and stop of the condenser 707 to ensure that the temperature of the fluid medium in the cold liquid tank 706 always remains within the set range. According to the signal of the third temperature sensor 906, the control element controls the start and stop of the heater 709 to ensure that the temperature of the fluid medium in the hot liquid tank 708 always remains within the set range. When the control element uses a programmable logic controller, software programs such as a logic control program and a timing control program are installed inside the control element to meet the needs of signal processing, data transmission, and automatic control of electrical equipment.

[0037] More specifically, the control member includes a first temperature controller 901, a second temperature controller 903, and a third temperature controller 905. Among them, in the actual implementation process, the control member can also adopt the first temperature controller 901, the second temperature controller 903, and the third temperature controller 905. The first temperature controller 901 is electrically connected to a first temperature sensor 902, a first delivery pump 704, and a second delivery pump 705 respectively.

[0038] Among them, after detecting the temperature, the first temperature sensor 902 transmits the corresponding control instruction signal to the first temperature controller 901. The first temperature controller 901 responds to the first temperature sensor 902, and the first temperature controller 901 controls the start of the first delivery pump 704 or the second delivery pump 705.

[0039] The second temperature controller 903 is electrically connected to a second temperature sensor 904 and a condenser 707 respectively.

[0040] Among them, the output end of the second temperature sensor 904 is connected to the input end of the second temperature controller 903, and is used to transmit the detected temperature signal to the second temperature controller 903. The second temperature sensor 904 is usually connected to the second temperature controller 903 through a specific interface or line. For example, the signal lines of sensors such as thermocouples and thermal resistors are connected to the corresponding input terminals of the second temperature controller 903. The output end of the second temperature controller 903 is connected to the control end of the condenser 707, and is used to control the opening and closing of the condenser 707. Usually, the second temperature controller 903 is connected to the condenser 707 through intermediate devices such as relays and solid-state relays to achieve the control of the condenser 707. For example, the output signal of the second temperature controller 903 can control the on-off of the solid-state relay, and further control the working state of the condenser 707.

[0041] The third temperature controller 905 is electrically connected to a third temperature sensor 906 and a heater 709 respectively, and the working principle is the same as the above principle.

[0042] A first three-way valve 701 is installed at the medium inflow end (i.e., the liquid inlet 10) of the heat exchange coil 6 and the two are connected. The two inflow ends of the first three-way valve 701 are respectively connected to the medium outflow ends of the first delivery pump 704 and the second delivery pump 705. Moreover, a first check valve 702 is installed at the medium outflow end of the first delivery pump 704; a second check valve 703 is installed at the medium outflow end of the second delivery pump 705.

[0043] The medium outflow end of the heat exchange coil 6 (i.e., the liquid outlet 11) is installed with a second three-way valve 712 and the two are connected. The two outflow ends of the second three-way valve 712 are respectively connected to the medium inflow ends of the cold liquid tank 706 and the hot liquid tank 708. Moreover, a third check valve 710 is installed at the medium inflow end of the cold liquid tank 706; a fourth check valve 711 is installed at the medium inflow end of the hot liquid tank 708. A support seat 15 is fixedly installed below the tank body 12. Among them, the check valve is used to prevent the backflow of fluid medium. The use of the three-way valve can reduce the conveying pipeline and lower the pipeline cost.

[0044] The application method of the built-in heat exchange type solid metal hydrogen storage device includes the following steps: Step 1, temperature control: Detect the internal temperature of the tank body 12 through the first temperature sensor 902, and the first temperature sensor 902 transmits the detected temperature signal to the control part; The temperature control component 9 controls the temperature of the fluid medium in the cold liquid tank 706 to be between 15 and 25 °C; when the temperature of the fluid medium in the cold liquid tank 706 is higher than 25 °C, control the control part to start the condenser 707, and when the temperature of the fluid medium in the cold liquid tank 706 is lower than 15 °C, control the control part to close the condenser 707; The temperature control component 9 controls the temperature of the fluid medium in the hot liquid tank 708 to be between 50 and 60 °C; when the temperature of the fluid medium in the hot liquid tank 708 is lower than 50 °C, control the control part to start the heater 709, and when the temperature of the fluid medium in the hot liquid tank 708 is higher than 60 °C, control the control part to close the heater 709.

[0045] Step 2, check the airtightness of the tank body 12: After closing the quick-opening blind plate 1, introduce nitrogen with a pressure of 5 MPa into the tank body 12 and keep the pressure for 6 hours. If the pressure in the tank body 12 does not drop by more than 0.02 MPa after 6 hours, it proves that the airtightness of the tank body 12 is qualified.

[0046] Step 3, during hydrogen storage: Fill hydrogen into the tank body 12 through the hydrogen inlet and outlet pipe 14, and control the internal pressure of the tank body 12 to be 5 MPa. When the internal temperature of the tank body 12 exceeds 30 °C, the temperature control component 9 controls to start the first transfer pump 704, and the first transfer pump 704 transports the low-temperature fluid medium in the cold liquid tank 706 to the heat exchange coil 6. The low-temperature fluid medium absorbs heat during the flow in the heat exchange coil 6, and the internal temperature of the tank body 12 decreases. After the internal temperature and pressure of the tank body 12 no longer change, end the hydrogen filling, and the temperature control component 9 controls to close the first transfer pump 704.

[0047] Step 4: During hydrogen release: Release the hydrogen inside the tank body 12 through the hydrogen inlet and outlet pipe 14. When the pressure inside the tank body 12 is lower than 1 MPa, control the start of the second delivery pump 705 through the temperature control component 9. The second delivery pump 705 delivers the high-temperature fluid medium in the hot liquid tank 708 to the heat exchange coil 6. The high-temperature fluid medium releases heat during the flow in the heat exchange coil 6, and the temperature inside the tank body 12 increases. When the pressure inside the tank body 12 is lower than atmospheric pressure, the hydrogen release is completed, and the temperature control component 9 controls the shutdown of the second delivery pump 705.

[0048] During use, during the hydrogen storage process, first fill hydrogen into the tank body 12 through the hydrogen inlet and outlet pipe 14, and the pressure inside the tank body 12 gradually increases. When the temperature inside the tank body 12 exceeds the set value, the first temperature sensor 902 in the temperature control component 9 detects the temperature signal and transmits it to the control component. The control component starts the first delivery pump 704 according to the signal and delivers the low-temperature fluid medium in the cold liquid tank 706 to the heat exchange coil 6. The low-temperature fluid medium absorbs the heat inside the tank body 12 during the flow in the heat exchange coil 6, thereby reducing the temperature inside the tank body 12.

[0049] At the same time, the second temperature sensor 904 monitors the temperature of the fluid medium in the cold liquid tank 706. When the temperature is higher than the set value, the control component starts the condenser 707 to cool the fluid medium in the cold liquid tank 706; when the temperature is lower than the set value, the control component shuts down the condenser 707 to ensure that the temperature of the fluid medium in the cold liquid tank 706 always remains within the set range. In this way, the hydrogen storage device can perform the hydrogen storage operation under the best temperature conditions, avoiding problems such as the decline in the performance of the hydrogen storage alloy caused by too high temperature, thus ensuring the efficient progress of the hydrogen storage process.

[0050] During the hydrogen release process, when hydrogen release is required, release the hydrogen inside the tank body 12 through the hydrogen inlet and outlet pipe 14, and the pressure inside the tank body 12 gradually decreases. When the pressure inside the tank body 12 is lower than the set value, the first temperature sensor 902 in the temperature control component 9 detects the temperature signal and transmits it to the control component. The control component starts the second delivery pump 705 according to the signal and delivers the high-temperature fluid medium in the hot liquid tank 708 to the heat exchange coil 6. The high-temperature fluid medium releases heat during the flow in the heat exchange coil 6, thereby increasing the temperature inside the tank body 12 and promoting the release of hydrogen.

[0051] At the same time, the third temperature sensor 906 monitors the temperature of the fluid medium in the hot liquid tank 708. When the temperature is lower than the set value, the control component starts the heater 709 to heat the fluid medium in the hot liquid tank 708; when the temperature is higher than the set value, the control component shuts down the heater 709 to ensure that the temperature of the fluid medium in the hot liquid tank 708 always remains within the set range. In this way, the hydrogen storage device can perform the hydrogen release operation under the best temperature conditions, improving the hydrogen release efficiency and ensuring the smooth progress of the hydrogen release process.

[0052] During the entire hydrogen storage and release process, the pressure gauge 8 monitors the pressure inside the tank body 12 in real time, providing important pressure information for the operator. When the pressure is abnormal, the operator can take corresponding measures in a timely manner to ensure the safe operation of the hydrogen storage device. In addition, the design of the quick-opening blind flange 1 makes the maintenance and repair of the hydrogen storage device more convenient and fast, improving the operability and maintenance efficiency of the device.

[0053] In summary, through the coordinated action of various components, the built-in heat exchange type solid metal hydrogen storage device of the present invention realizes the efficient, safe and reliable operation of the hydrogen storage process, and has broad application prospects.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An internally heat-exchanging solid metal hydrogen storage device, characterized in that: It includes a tank body (12), a double-cycle liquid component (7), a temperature control component (9), and a hydrogen storage component. The hydrogen storage component includes a hydrogen storage alloy element (13), two support frames (3), and a plurality of positioning rods (5). Each of the support frames (3) is fixedly installed on the inner side wall of the tank body (12). The two ends of each positioning rod (5) are respectively fixedly installed with the two support frames (3). Each positioning rod (5) is parallel to each other. The hydrogen storage alloy element (13) is fixedly installed on each positioning rod (5). The double-cycle liquid component (7) includes a heat exchange coil (6), a first conveying assembly, and a second conveying assembly. The heat exchange coil (6) is fixedly installed on the inner side wall of the tank body (12). The medium outflow end of the first conveying assembly is communicated with the medium inflow end of the heat exchange coil (6). The medium inflow end of the first conveying assembly is communicated with the medium outflow end of the heat exchange coil (6). The medium outflow end of the second conveying assembly is communicated with the medium inflow end of the heat exchange coil (6). The medium inflow end of the second conveying assembly is communicated with the medium outflow end of the heat exchange coil (6). The first conveying assembly and the second conveying assembly respectively convey a fluid medium into the heat exchange coil (6). The temperature control component (9) is respectively connected to the first conveying assembly and the second conveying assembly in a controlled manner. The temperature control component (9) respectively controls the rise and fall of the temperature of the fluid medium inside the first conveying assembly and the second conveying assembly. When the first conveying assembly conveys a low-temperature fluid medium into the heat exchange coil (6), the low-temperature fluid medium absorbs the heat inside the tank body (12), reducing the temperature and pressure inside the tank body (12). When the second conveying assembly conveys a high-temperature fluid medium into the heat exchange coil (6), the high-temperature fluid medium transfers heat to the inside of the tank body (12), increasing the temperature and pressure inside the tank body (12).

2. The built-in heat exchange type solid metal hydrogen storage device according to claim 1, characterized in that: One end of the tank body (12) is fixedly installed with a tank flange (2), and a quick-opening blind plate (1) is fixedly installed on the tank flange (2). A pressure gauge (8) is fixedly installed on the tank body (12). The other end of the tank body (12) is fixedly installed with a hydrogen inlet and outlet pipe (14) and they are communicated.

3. The built-in heat exchange type solid metal hydrogen storage device according to claim 1, characterized in that: The first conveying component includes a cold liquid tank (706), a condenser (707), and a first conveying pump (704). The condenser (707) is fixedly installed on the cold liquid tank (706). The condenser (707) cools the fluid medium in the cold liquid tank (706). The medium inlet end of the cold liquid tank (706) is communicated with the medium outlet end of the heat exchange coil (6). The medium outlet end of the cold liquid tank (706) is fixedly installed and communicated with the medium inlet end of the first conveying pump (704). The medium outlet end of the first conveying pump (704) is communicated with the medium inlet end of the heat exchange coil (6). The second conveying component includes a hot liquid tank (708), a heater (709), and a second conveying pump (705). The heater (709) is fixedly installed on the hot liquid tank (708). The heater (709) heats the fluid medium in the hot liquid tank (708). The medium inlet end of the hot liquid tank (708) is communicated with the medium outlet end of the heat exchange coil (6). The medium outlet end of the hot liquid tank (708) is fixedly installed and communicated with the medium inlet end of the second conveying pump (705). The medium outlet end of the second conveying pump (705) is communicated with the medium inlet end of the heat exchange coil (6).

4. A built-in heat exchange type solid metal hydrogen storage device according to claim 3, characterized in that: The temperature control component (9) includes a control component, a first temperature sensor (902), a second temperature sensor (904), and a third temperature sensor (906). The first temperature sensor (902) is fixedly installed inside the tank body (12). The second temperature sensor (904) is fixedly installed inside the cold liquid tank (706). The third temperature sensor (906) is fixedly installed inside the hot liquid tank (708).

5. The built-in heat exchange type solid metal hydrogen storage device according to claim 4, wherein: The control component uses a programmable logic controller. The programmable logic controller is electrically connected to the first temperature sensor (902), the second temperature sensor (904), the third temperature sensor (906), the first conveying pump (704), the condenser (707), the second conveying pump (705), and the heater (709) respectively.

6. The built-in heat exchange type solid metal hydrogen storage device according to claim 4, wherein: The control component includes a first temperature controller (901), a second temperature controller (903), and a third temperature controller (905). The first temperature controller (901) is electrically connected to the first temperature sensor (902), the first conveying pump (704), and the second conveying pump (705) respectively. The second temperature controller (903) is electrically connected to the second temperature sensor (904) and the condenser (707) respectively. The third temperature controller (905) is electrically connected to the third temperature sensor (906) and the heater (709) respectively.

7. A method for applying an internal heat exchange type solid metal hydrogen storage device according to any one of claims 1 to 6, characterized in that It includes the following steps: Step 1, temperature control: The temperature inside the tank body (12) is detected by the first temperature sensor (902). The first temperature sensor (902) transmits the detected temperature signal to the control component. The temperature control component (9) controls the temperature of the fluid medium in the cold liquid tank (706) to be between 15 and 25 °C; when the temperature of the fluid medium in the cold liquid tank (706) is higher than 25 °C, the condenser (707) is controlled to start through the control component, and when the temperature of the fluid medium in the cold liquid tank (706) is lower than 15 °C, the condenser (707) is controlled to be turned off through the control component; The temperature control component (9) controls the temperature of the fluid medium in the hot liquid tank (708) to be between 50 and 60 °C; when the temperature of the fluid medium in the hot liquid tank (708) is lower than 50 °C, the heater (709) is controlled to start through the control component, and when the temperature of the fluid medium in the hot liquid tank (708) is higher than 60 °C, the heater (709) is controlled to be turned off through the control component; Step 2: Inspect the airtightness of the tank body (12): After closing the quick-opening blind flange (1), introduce nitrogen at 5 MPa into the tank body (12) and maintain the pressure for 6 hours. If the pressure in the tank body (12) does not drop by more than 0.02 MPa after 6 hours, it proves that the airtightness of the tank body (12) is qualified; Step 3: During hydrogen storage: Hydrogen is filled into the inside of the tank body (12) through the hydrogen inlet and outlet pipe (14), and the internal pressure of the tank body (12) is controlled at 5 MPa; when the temperature inside the tank body (12) exceeds 30 °C, the temperature control component (9) controls the start of the first transfer pump (704), and the first transfer pump (704) transports the low-temperature fluid medium in the cold liquid tank (706) to the heat exchange coil (6). The low-temperature fluid medium absorbs heat during the flow in the heat exchange coil (6), and the internal temperature of the tank body (12) decreases; after the internal temperature and pressure of the tank body (12) no longer change, the hydrogen filling ends, and the temperature control component (9) controls the closing of the first transfer pump (704); Step 4: During hydrogen release: The hydrogen inside the tank body (12) is released through the hydrogen inlet and outlet pipe (14). When the internal pressure of the tank body (12) is lower than 1 MPa, the temperature control component (9) controls the start of the second transfer pump (705), and the second transfer pump (705) transports the high-temperature fluid medium in the hot liquid tank (708) to the heat exchange coil (6). The high-temperature fluid medium releases heat during the flow in the heat exchange coil (6), and the internal temperature of the tank body (12) increases; when the internal pressure of the tank body (12) is lower than atmospheric pressure, the hydrogen release is completed, and the temperature control component (9) controls the closing of the second transfer pump (705).

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