A lithium hydride synthesis system

Abstract

The present application discloses a lithium hydride synthesis system, which includes: a reactor, a hydrogen adding device, a vacuum pump, an inert gas adding device, a temperature control device and a control system, and the following process is implemented under the control of the control system: when pure lithium raw material has been added to the reactor, the vacuum pump and the inert gas adding device are controlled to repeat at least twice the steps of evacuating the gas inside the reactor and adding inert gas, and then the vacuum pump is controlled to evacuate the gas inside the reactor, and then hydrogen is added to the reactor by the hydrogen adding device, and the reactor is controlled by the temperature control device according to the preset rules to control the reaction temperature, so as to realize the synthesis of lithium hydride. The system can realize the automated operation of lithium hydride synthesis, improve production efficiency and reduce labor costs, and reduce the impact of malfunction caused by manual operation, and enhance the safety and stability of production operation.

Description

Technical Field

[0001] The present application relates to the technical field of material synthesis, and in particular to a lithium hydride synthesis system. Background Art

[0002] Lithium hydride is a lithium hydride. Its powder is white and has the characteristics of high mass hydrogen storage density, high melting point, low density and active chemical properties.

[0003] Lithium hydride has various applications: as a strong reducing agent, lithium hydride can be used to reduce carbonyl compounds, acyl compounds, etc., so as to synthesize various organic compounds with specific functional groups; in the new energy materials industry, lithium hydride can be used to release hydrogen through hydrolysis reaction to provide the required hydrogen supply for fuel cells, or as a hydrogen storage material in the field of hydrogen energy; in the pharmaceutical industry, lithium hydride can be used as a catalyst, reducing agent or reaction intermediate for researching compounds or drugs; in the alloy smelting industry, lithium hydride can be used to prepare special alloys and materials with high strength, high hardness and corrosion resistance; in the chemical synthesis industry, lithium hydride can be used as a nuclear magnetic resonance (NMR) spectrometer. It is a sample solvent in MR experiments with stronger chemical shift and lower noise level. It can also be used as a hydrogen source and is widely used in organic synthesis reactions, such as hydrogenation, reduction, hydrogenation and alkylation. In the electronics industry, lithium hydride can be used as a cathode material in lithium-ion batteries, providing high energy density and long cycle life. It can also be used as a stabilizer in ceramic processes to improve the performance of ceramic materials. It can also be used in optical coatings to prepare thin films with specific refractive index and transmittance. It can also be used as a dose doping source in semiconductor processes to adjust the performance of electronic devices. It can also be used for substrate surface pretreatment in the vapor phase epitaxy (CVD) process during integrated circuit manufacturing.

[0004] The existing production methods of lithium hydride are often highly dependent on manual operations, and have problems such as low output, low production efficiency, high labor intensity and high safety risks. Summary of the invention

[0005] In view of this, the present application provides a lithium hydride synthesis system, which realizes industrial mass production of lithium hydride through automated control of lithium hydride synthesis.

[0006] The technical solutions provided by this application are as follows:

[0007] According to an embodiment of the first aspect of the present application, a lithium hydride synthesis system is provided, comprising:

[0008] The reactor is used to provide a space for lithium hydride synthesis; the system is provided with a pressure detection device for detecting the pressure inside the reactor and a temperature detection device for detecting the temperature inside the reactor;

[0009] A hydrogen adding device, used for adding hydrogen into the reactor;

[0010] A vacuum pump, used to evacuate the gas inside the reactor;

[0011] An inert gas adding device, used for adding inert gas into the above reactor;

[0012] A temperature control device, used to heat and / or cool the reactor to control the internal temperature of the reactor;

[0013] A control system is connected to the reactor, the hydrogen adding device, the vacuum pump, the inert gas adding device and the temperature control device, and is used to control the following process: when lithium hydride needs to be synthesized and pure lithium raw material has been added to the reactor, the vacuum pump and the inert gas adding device are controlled to repeat the steps of evacuating the gas inside the reactor and adding inert gas at least twice, then the vacuum pump is controlled to evacuate the gas inside the reactor, and then hydrogen is added to the reactor according to the pressure inside the reactor through the hydrogen adding device, and the reaction temperature of the reactor is controlled according to a preset rule through the temperature control device according to the measured value of the temperature detection device of the reactor, and after the reaction is completed, the temperature of the reactor is waited to drop to room temperature, and then the vacuum pump and the inert gas adding device are controlled to perform protective replacement of the gas inside the reactor, so as to complete the synthesis of lithium hydride.

[0014] It can be seen from the above scheme that the present application controls the hydrogen adding device, the vacuum pump and the inert gas adding device through the control system to realize the automatic replacement of the gas in the reactor and the automatic adjustment of the amount of reaction hydrogen, and realizes the automatic control of the reaction temperature through the temperature control device, thereby effectively solving the problems of automatic production and safety protection of lithium hydride, improving production efficiency while reducing labor costs and improving the safety of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a lithium hydride synthesis system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application clearer, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the present application shown in the accompanying drawings and described according to the accompanying drawings are merely exemplary, and the present application is not limited to these embodiments.

[0017] It should also be noted here that in order to avoid obscuring the focus of the present application due to unnecessary details, the accompanying drawings mainly show structures and / or processing steps that are closely related to the scheme according to the present application, while omitting some other details that are not very relevant to the present application.

[0018] The technical solutions in the embodiments of the present application are described in detail below.

[0019] The present application embodiment provides a lithium hydride synthesis system, which includes at least a reactor, a hydrogen addition device, a vacuum pump, an inert gas addition device, a temperature control device and a control system. Among them:

[0020] A reactor is used to provide a space for lithium hydride synthesis; the system is provided with a pressure detection device for detecting the internal pressure of the reactor and a temperature detection device for detecting the internal temperature of the reactor. The reactor is the core device of the lithium hydride synthesis system. In one embodiment, the reactor can be further divided into a reaction zone and a cooling end, wherein the reaction zone is used for the lithium hydride synthesis reaction, and the cooling end further includes a feed port and a discharge port, which are used for feeding and discharging, respectively. Furthermore, a circulating cooling device can be provided in the system to cool the above-mentioned cooling end, and the circulating cooling device can be provided with a high-temperature alarm structure for alarming when the temperature exceeds a preset value. The above-mentioned pressure detection device can specifically be a differential pressure (pressure) transmitter, and the above-mentioned temperature detection device can specifically be a thermocouple.

[0021] The hydrogen adding device is used to add hydrogen into the reactor. In one embodiment, the hydrogen adding device can adjust the amount of hydrogen added according to the pressure in the reactor.

[0022] The vacuum pump is used to evacuate the gas inside the reactor. In some embodiments, the criterion for determining that the gas inside the reactor is evacuated is that the pressure inside the reactor reaches or approaches a vacuum value.

[0023] The inert gas adding device is used to add inert gas to the reactor. In some embodiments, the standard for judging whether the inert gas addition is completed is: the pressure inside the reactor reaches a slightly positive pressure. By adding inert gas, material protection and safe production protection can be achieved to a certain extent.

[0024] A temperature control device is used to heat and cool the reactor to control the internal temperature of the reactor. In one embodiment, the temperature control device includes a movable heating device and an air cooling device, which are used to control the heating and cooling process of the synthesis reaction in stages; wherein, at least one group of heaters is arranged inside the movable heating device, and an opening and closing mechanism is provided to realize the separation cooling and closed heating of the movable heating device and the reactor. Specifically, the movable heating device can be divided into two parts, both of which are made of heat-resistant and heat-insulating materials, and at least one group (depending on the length of the reactor) of heaters (such as heating resistance wires) is buried on the side close to the reactor, and the heating is controlled by the control system, and the movable heating device is installed on a track, and can be moved in the direction of approaching-moving away from the reactor, so as to realize closed heating when the movable heating device is close to the reactor, and realize separation cooling when it is away from the reactor.

[0025] The control system is connected with the hydrogen adding device, the vacuum pump, the inert gas adding device and the temperature control device, and is used to control the following process: when lithium hydride needs to be synthesized and pure lithium raw material has been added to the reactor, the vacuum pump and the inert gas adding device are controlled to repeat at least twice the steps of evacuating the gas inside the reactor and adding inert gas, and then the vacuum pump is controlled to evacuate the gas inside the reactor, and then the hydrogen adding device is controlled to add hydrogen to the reactor, and the reactor is controlled by the temperature control device according to the preset rules to control the reaction temperature, so as to realize the synthesis of lithium hydride. In one embodiment, in order to facilitate manual management of the lithium hydride synthesis process, the control system can be further connected with a display device and an interactive device, such as a touch screen, so as to manually monitor the synthesis progress, start the synthesis process or switch to manual maintenance, etc. Specifically, the interactive device can receive user input and transmit it to the control system, so that the control system controls the lithium hydride synthesis process according to the user input, such as starting the lithium hydride synthesis process according to the user input, processing the detected pressure signal / temperature signal, and controlling the temperature control device / hydrogen adding device / inert gas adding device / vacuum pump and other devices.

[0026] In one embodiment, the steps of controlling the vacuum pump and the inert gas adding device to repeatedly evacuate the gas inside the reactor and add inert gas at least twice include: starting the vacuum pump to evacuate the gas inside the reactor, when the pressure inside the reactor is close to the vacuum value, the vacuum pump automatically stops or the control system controls the vacuum pump to stop; starting the inert gas adding device to add inert gas to the reactor, when the pressure inside the reactor is slightly positive, closing the inert gas adding device; repeating the above steps two to three times.

[0027] In one embodiment, hydrogen is added to the reactor by a hydrogen adding device, and the reaction temperature of the reactor is controlled according to preset rules by a temperature control device, specifically including: after the temperature of the reaction zone of the reactor is raised to the melting temperature of metallic lithium by the temperature control device, the reaction zone is controlled to be constant for 30 minutes (min), and then the reaction zone is continued to be heated to the melting temperature of lithium hydride, during which hydrogen is continuously added to the reactor according to the reactor pressure by the hydrogen adding device; after the temperature of the reaction zone is raised to the melting temperature of lithium hydride, the reaction zone is controlled to be constant for 30 minutes, and then the hydrogen adding device is controlled to stop adding hydrogen and the reaction zone is cooled by air.

[0028] In one embodiment, after synthesizing lithium hydride, the synthesized material needs to be taken out. Before taking out the material, the control system can also control the following discharge process: after the reaction is completed and the temperature of the reactor drops to room temperature, the vacuum pump and the inert gas adding device are controlled to repeat at least twice to evacuate the gas inside the reactor and add inert gas protection steps.

[0029] In one embodiment, the control system is further configured to: perform protection or alarm operations according to the reactor temperature and pressure, thereby improving the safety of the lithium hydride synthesis process. For example, when the reactor temperature exceeds the first protection threshold, the hydrogen addition device stops adding hydrogen to the reactor, and the temperature control device stops heating the reactor; when the reactor temperature exceeds the second protection threshold, the temperature control device cools the reactor with air, and controls the vacuum pump and the inert gas addition device to add inert gas to the reactor for protection. The first protection threshold and the second protection threshold can be preset by the interactive device of the control system.

[0030] According to the lithium hydride synthesis system provided in the present application, the hydrogen addition device, the vacuum pump and the inert gas addition device are controlled by the control system, so that automatic replacement of the gas in the reactor and automatic adjustment of the amount of reaction hydrogen can be achieved, and automatic control of the reaction temperature can be achieved through the temperature control device, thereby effectively solving the problems of automatic production and safety protection of lithium hydride, improving production efficiency while reducing labor costs and improving the safety of industrial production.

[0031] To facilitate understanding of the composition and connection relationship of each part in the lithium hydride synthesis system provided in the embodiment of the present application, the following is combined with Figure 1 Further explanation.

[0032] Figure 1 A schematic diagram of the structure of a lithium hydride synthesis system provided in an embodiment of the present application is shown in FIG. Figure 1As shown, the system may include: a differential pressure (pressure) transmitter 100, a thermocouple 110, a flow meter 120, a circulating oil return main pipe temperature thermal resistor 130, a reactor hydrogen addition pipeline 200, an inert gas addition pipeline 210, a reactor and vacuum pump connection pipeline 220, a gas exhaust pipeline 230, a circulating cooling oil pipeline 240, a reactor 300, a movable heating device 310, a vacuum pump device 320, a hydrogen addition regulating valve 400, an inert gas addition cut-off ball valve 410, an exhaust gas cut-off ball valve 420 and a control system 500 (not shown in the figure). The connection relationship of the above structures is as shown in FIG. Figure 1 shown.

[0033] The hydrogen adding device mentioned above includes a reactor adding hydrogen pipeline 200 and a hydrogen adding regulating valve 400, and the hydrogen adding regulating valve 400 can be a single-seat regulating valve; the inert gas adding device mentioned above includes an inert gas adding pipeline 210 and an inert gas adding cut-off ball valve 410; the circulating cooling device mentioned above includes a circulating cooling oil pipeline 240 and a circulating oil return main pipe temperature thermal resistor 130; the vacuum pump mentioned above (including Figure 1 The vacuum pump device 320 and the exhaust gas cut-off ball valve 420 in the reactor 300 are connected to the vacuum pump connecting pipe 220 and the gas exhaust pipe 230 to realize the exhaust of the gas inside the reactor 300; the temperature control device above includes a movable heating device 310; a touch screen is provided on the control system 500, and the control system 500 can control the valve states of the hydrogen addition regulating valve 400, the inert gas cut-off ball valve 410 and the exhaust gas cut-off ball valve 420 through signals, so as to flexibly and accurately control the input or output of the gas.

[0034] Specifically, Figure 1 In the system shown, the temperature of the reactor 300 is mainly controlled by the movable heating device 310; the differential pressure (pressure) transmitter 100 and the thermocouple 110 are installed on the reactor 300, and are respectively used to detect the internal pressure and temperature of the reactor 300. The measurement range (gauge pressure) of the differential pressure (pressure) transmitter 100 is -100kPa to +50kPa, and the measured value is converted into an electrical signal and transmitted to the control system 500 for processing. The thermocouple 110 measures a temperature range of 0°C to 1000°C and is installed in the reaction zone of the reactor. The measured temperature signal is transmitted to the control system 500 for processing; three groups of heaters are arranged inside the movable heating device 310, and an opening and closing mechanism is arranged for separate cooling and closed heating of the movable heating device 310 and the reactor 300.

[0035] The hydrogen adding pipeline 200 is connected to the cooling end of the reactor 300. The hydrogen raw material required for the reaction is added to the reactor 300 through the hydrogen adding pipeline 200 after the pressure is reduced; a hydrogen adding regulating valve 400 is provided on the hydrogen adding pipeline 200, and hydrogen can be stably added according to the pressure in the reactor 300 under the control of the controller. The hydrogen adding pipeline 200 is connected to the inert gas adding pipeline 210 between the hydrogen adding regulating valve 400 and the reactor 300, which is used to replace the gas in the reactor 300, the hydrogen adding pipeline 200, the vacuum pump connecting pipeline 220 and the gas exhausting pipeline 230; an inert gas adding cut-off ball valve 410 is provided on the inert gas adding pipeline 210 to control the input of the inert gas.

[0036] The vacuum pump device 320 is connected to the cooling end of the reactor 300 via the reactor-vacuum pump connecting pipe 220; the outlet of the vacuum pump device 320 is connected to the gas exhaust pipe 230 for exhausting the gas in the reactor 300; an exhaust gas cut-off ball valve 420 is provided on the gas exhaust pipe 230 for exhausting the gas in the reactor 300.

[0037] The cooling ends at both ends of the reactor 300 are connected to the circulating cooling oil pipeline 240, and the cooling ends of the reactor 300 are cooled by the circulating oil to protect the reactor sealing device. A thermal resistor 130 is set on the total return oil pipe of the circulating cooling oil pipeline 240 for temperature alarm to prevent overheating and damage to the reactor 300. A flow meter 120 is also set on the hydrogen addition pipeline 200 to record the amount of hydrogen used.

[0038] The signals of the differential pressure (pressure) transmitter 100, the thermocouple 110, the flow meter 120, the thermal resistor 130, the heater and the opening and closing mechanism of the movable heating device 310, the vacuum pump equipment 320, the hydrogen addition regulating valve 400, the inert gas addition cut-off ball valve 410 and the exhaust gas cut-off ball valve 420 are all connected to the control system 500; the control system 500 is used for on-site signal processing and controlling the actions of the above equipment to complete a fully automated production process.

[0039] At the beginning of the production process, the circulating cooling oil circulation is started, and the movable heating device 310, the vacuum pump device 320 and the control system 500 are powered on. After the pure lithium raw material is placed in the reactor 300, the reactor inlet and outlet are closed; and the lithium hydride synthesis reaction program is started through the touch screen of the control system 500.

[0040] In the initial state, the hydrogen addition regulating valve 400, the inert gas addition cut-off ball valve 410 and the exhaust gas cut-off ball valve 420 are all closed; the opening and closing mechanism of the movable heating device 310 is closed but the heating is not started.

[0041] The control system 500 starts the inert gas replacement operation of the reactor 300, including: opening the exhaust gas cut-off ball valve 420 and starting the vacuum pump device 320 to exhaust the air in the reactor 300 and the pipeline. When the differential pressure (pressure) transmitter 100 detects that the internal pressure is close to the vacuum value, the vacuum pump device 320 automatically stops the pump or is controlled by the control system 500 to stop the pump, and closes the exhaust gas cut-off ball valve 420; starting the inert gas addition cut-off ball valve 410, when the differential pressure (pressure) transmitter 100 detects that the pressure is a slightly positive pressure, close the inert gas addition cut-off ball valve 410; repeat the above steps two to three times.

[0042] After completing the inert gas replacement operation, the control system 500 starts to execute the hydrogen filling and synthesis reaction process, including: controlling the exhaust gas cut-off ball valve 420 to open and starting the vacuum pump device 320, when the differential pressure (pressure) transmitter 100 detects that the internal pressure is close to the vacuum value, stopping the operation of the vacuum pump device 320 and closing the exhaust gas cut-off ball valve 420; controlling the opening of the hydrogen addition regulating valve 400 to not more than 40%, according to the opening of the hydrogen addition regulating valve 400, ensuring that hydrogen is slowly filled into the reactor 300 to make its pressure reach normal pressure, and putting the adjustment program of the hydrogen addition regulating valve 400 and the differential pressure (pressure) transmitter 100 into use, and adjusting the target setting value to 1kPa, so that the hydrogen addition regulating valve 400 can stably input hydrogen according to the target setting value.

[0043] The movable heating device 310 is started. When the thermocouple 110 in the reaction zone of the reactor 300 detects that the temperature has risen to the melting temperature of metallic lithium, the heating device 320 is controlled to maintain a constant temperature for 30 minutes, and the reactor is continuously heated to the melting temperature of lithium hydride. During this period, the hydrogen addition regulating valve 400 continuously replenishes hydrogen according to the set value of the differential pressure (pressure) transmitter 100. After the temperature of the reactor 300 has risen to the melting temperature of lithium hydride for 30 minutes, the hydrogen addition regulating valve 400 is closed and the regulating control of the differential pressure (pressure) transmitter 100 is disconnected. The separation action of the movable heating device 310 is started to perform air cooling.

[0044] When the temperature of the reactor 300 drops to room temperature, the control system 500 executes the finished product discharging process according to the temperature measured by the thermocouple 110, including: controlling the exhaust gas cut-off ball valve 420 to open and starting the vacuum pump device 320, when the differential pressure (pressure) transmitter 100 detects that the internal pressure is close to the vacuum value, stopping the operation of the vacuum pump device 320 and closing the exhaust gas cut-off ball valve 420; starting the inert gas addition cut-off ball valve 410, when the differential pressure (pressure) transmitter 100 detects that the pressure is a slightly positive pressure, closing the inert gas addition cut-off ball valve 410; repeating the above steps two to three times.

[0045] After all the procedures are executed, the control system 500 displays on the touch screen that the process is completed, and the discharge port of the reactor 300 can be opened to take out the synthesized materials.

[0046] The control system 500 is also configured to perform protection or alarm operations according to the temperature and pressure of the reaction zone. For example, when the temperature of the reaction zone of the reactor 300 exceeds the first protection threshold (such as 800°C), the hydrogen addition regulating valve 400 is closed and the resistance wire of the movable heating device 310 is stopped; when the temperature of the reaction zone exceeds the second protection threshold (such as 900°C), the separation action of the movable heating device 310 is started and air cooling is performed; when the temperature measured by the thermal resistor 130 of the circulating oil return main pipe temperature is higher than 60°C, the control system 500 alarms and the operator needs to check the cooling system; when the gas evacuation operation is performed, when the differential pressure (pressure) transmitter 100 detects that the internal pressure cannot be reduced to the preset vacuum value for a long time, the control system 500 alarms and the operator checks the sealing of the reactor 300. The reaction time of each stage of the reactor 300 and the internal hydrogen pressure adjustment range can be set through the touch screen of the control system 500.

[0047] According to the control system 500 of the embodiment of the present application, the control mode, reaction time, internal hydrogen pressure range and control temperature, etc. can be selected through the touch screen HMI (Human Machine Interface) connected to the controller; through the control system 500, the closed temperature rise control and open and close cooling control of the movable heating device 310, the regulation of the reactor 300 pressure and the hydrogen addition regulating valve 400, the inert gas addition cut-off ball valve 410, the exhaust gas cut-off ball valve 420 and the vacuum pump interlocking control can be realized to achieve full automation of gas replacement, synthesis reaction and discharge process, greatly reduce the operation time, maintenance amount and corresponding labor cost of process operators, and at the same time reduce the impact of malfunctions caused by human operation, insufficient reaction time and untimely operation on production. The system also enhances production safety, adds temperature and pressure interlocking protection, and can deal with risks in the production process in a timely manner through the control system.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A lithium hydride synthesis system, characterized in that: include: A reactor, used for providing a space for synthesizing lithium hydride; The system is provided with a pressure detection device for detecting the pressure inside the reactor and a temperature detection device for detecting the temperature inside the reactor; A hydrogen adding device, used for adding hydrogen into the reactor; A vacuum pump, used to evacuate the gas inside the reactor; an inert gas adding device, used for adding inert gas into the reactor; A temperature control device, used for heating and cooling the reactor to control the internal temperature of the reactor; A control system is connected to the reactor, the hydrogen adding device, the vacuum pump, the inert gas adding device and the temperature control device, and is used to control the following process: when lithium hydride needs to be synthesized and pure lithium raw material has been added to the reactor, the vacuum pump and the inert gas adding device are controlled to repeat the steps of evacuating the gas inside the reactor and adding inert gas at least twice, then the vacuum pump is controlled to evacuate the gas inside the reactor, and then the hydrogen adding device is controlled to add hydrogen to the reactor according to the pressure inside the reactor, and the temperature control device is controlled to control the reaction temperature of the reactor according to a preset rule according to the measurement value of the temperature detection device of the reactor, and after the reaction is completed, the temperature of the reactor is waited to drop to room temperature, and then the vacuum pump and the inert gas adding device are controlled to perform protective replacement of the gas inside the reactor, so as to complete the synthesis of lithium hydride.

2. The system according to claim 1, characterized in that The control system is specifically used for: When controlling the vacuum pump to evacuate the gas inside the reactor, if it is detected that the pressure inside the reactor is close to a vacuum value, stopping evacuating the gas inside the reactor; When the inert gas adding device is controlled to add the inert gas into the reactor, if it is detected that the internal pressure of the reactor is a slightly positive pressure, the addition of the inert gas into the reactor is stopped.

3. The system according to claim 1, characterized in that The reactor comprises a reaction zone and a cooling end. The reaction zone is used for lithium hydride synthesis reaction. The cooling end comprises a feed port and a discharge port, which are used for feeding and discharging, respectively.

4. The system according to claim 3, characterized in that The controlling the hydrogen adding device to add hydrogen to the reactor according to the pressure in the reactor, and controlling the temperature control device to control the reaction temperature of the reactor according to a preset rule according to the measured value of the temperature detection device of the reactor, comprises: After the temperature of the reaction zone is raised to the melting temperature of metallic lithium by the temperature control device, the reaction zone is controlled to be kept at a constant temperature for 30 minutes, and then the temperature of the reaction zone is continued to be raised to the melting temperature of lithium hydride, during which the hydrogen adding device continues to add hydrogen to the reactor according to the pressure of the reactor; after the temperature of the reaction zone is raised to the melting temperature of lithium hydride, the temperature control device is controlled to keep the reaction zone at a constant temperature for 30 minutes, and then the hydrogen adding device is controlled to stop adding hydrogen and the temperature control device is controlled to air-cool the reaction zone.

5. The system according to claim 4, characterized in that After the reaction zone is cooled by air, the control system is also used to control the following process: When the temperature of the reaction zone drops to room temperature, the vacuum pump and the inert gas adding device are controlled to repeat the steps of evacuating the gas inside the reactor and adding inert gas at least twice.

6. The system according to claim 3, characterized in that The system further comprises a circulating cooling device for cooling the cooling end; the circulating cooling device is provided with a high temperature alarm structure for alarming when the temperature exceeds a preset value.

7. The system according to claim 1, characterized in that The temperature control device comprises a movable heating device, and the movable heating device comprises an opening and closing mechanism and at least one set of heaters, which are used to realize separate cooling and closed heating of the movable heating device and the reactor.

8. The system according to claim 1, characterized in that The hydrogen addition device includes a hydrogen addition regulating valve, the inert gas addition device includes an inert gas cut-off ball valve, the vacuum pump includes an exhaust gas cut-off ball valve for exhausting gas and a vacuum pump device, and the control system controls the valve states of the hydrogen addition regulating valve, the inert gas cut-off ball valve and the exhaust gas cut-off ball valve and the vacuum pump device through signals, thereby controlling the input or output of the gas.

9. The system according to claim 1, characterized in that The control system is connected to an interactive device, which is used to receive user input and transmit it to the control system, so that the control system controls the lithium hydride synthesis process according to the user input.

10. The system according to claim 1, characterized in that The control system is also used for: When the temperature of the reactor exceeds a first protection threshold, stopping adding hydrogen to the reactor through the hydrogen adding device, and stopping heating the reactor by the temperature control device; When the temperature of the reactor exceeds a second protection threshold, the temperature control device is used to air-cool the reactor, and the vacuum pump and the inert gas adding device are controlled to add inert gas for protection.

Images