Magnesium-based solid hydrogen storage and discharge system and method coupled with industrial waste heat

Abstract

The invention discloses a magnesium-based solid hydrogen storage and release system coupled with industrial waste heat, and a ton-level magnesium-based solid hydrogen storage unit adopts a modular hydrogen storage bed design and is used for receiving raw materials and realizing hydrogen storage under preset conditions. The industrial waste heat coupling heat management unit is used for collecting waste heat from an industrial waste heat source and supplying heat to the tonnage magnesium-based solid hydrogen storage unit. And the multi-energy medium access unit is integrated with standard quick interfaces of hydrogen, nitrogen, electric power and cooling water, and inputs an external energy medium to the ton-level magnesium-based solid hydrogen storage unit. And the safety and intelligent control unit is used for monitoring the ton-level magnesium-based solid hydrogen storage unit and executing corresponding control according to a monitoring result. The method is mainly characterized in that energy consumption is reduced by more than or equal to 60% compared with electric heating through waste heat-heat conduction oil-bed layer cascade heat exchange control. The system realizes low-cost driving of industrial waste heat, safe and quick release of ton-level solid hydrogen and remote intelligent operation and maintenance, and provides a complete set of solutions for large-scale industrial application of hydrogen energy.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of hydrogen energy storage and release, and particularly relates to a magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat and a method. BACKGROUND

[0002] Although the solid-state hydrogen storage technology (magnesium-based hydride) has high volumetric hydrogen storage density (≥100 kg / m 3 ) and low leakage risk, there are still the following bottlenecks in industrial hydrogen release applications: High energy consumption: existing systems generally use electric heating or gas heating, and the single-ton hydrogen release power consumption is ≥80 kWh, and the operation cost accounts for more than 35% of the total hydrogen utilization cost; Low utilization rate of industrial waste heat: the annual emission of coke oven flue gas (200-300 ℃) of a steel plant is more than 10 12 kJ, and the current technology has not realized precise coupling with the solid-state hydrogen storage and release process; Low system integration and long construction period: the hydrogen storage vehicle and the on-site hydrogen, nitrogen, electricity and cooling water systems need to be separately constructed and connected, and the installation and debugging period is ≥7 days, lacking unified control logic; Delayed safety response: the traditional hydrogen concentration detection response time is ≥5s, and the emergency shutdown action delay is >1s, which cannot meet the requirement of GB 50516-2021 "emergency shutdown within 0.1s".

[0003] In order to solve the above problems, the existing technology uses an electric heating rod to directly heat the hydrogen storage bed, without using any industrial waste heat, resulting in high energy consumption. In some existing technologies, the heating method is still electric furnace + hot air circulation, without intermediate heat exchange of heat transfer oil, resulting in temperature fluctuation ±8℃, which leads to the decline of hydrogen storage performance. Further, some existing technologies only propose the concept of "flue gas - hydrogen storage tank" direct heat exchange, but do not solve the problems of dust, corrosion and temperature fluctuation in flue gas; without cascade heat exchange and PID closed loop, the hydrogen release rate is unstable. Some existing technologies use a mobile chassis to only solve "transportable", still need to be connected with 380V electric heating; but do not set a fast multi-medium interface, and the on-site installation time is ≥3 days, which is long. Some existing technologies only use a mechanical safety valve + rupture disc, without online hydrogen concentration monitoring and ESD electromagnetic valve, with a response time of ≈2s, which cannot meet the requirement of emergency shutdown. Some existing technologies only control the variable temperature - pressure two-position switch without AI algorithm, resulting in high fault recognition rate.

[0004] Therefore, the prior art is still in the stage of "electric heating" or "rough residual heat direct heating", and a gradient, accurate and low-dust coupling scheme of "flue gas → heat conducting oil → hydrogen storage bed" has not been formed. There is no prior art that integrates "coke oven flue gas residual heat + PID heat conducting oil temperature control + quick plug-in multi-medium interface + AI remote diagnosis" into a ton-level mobile hydrogen storage vehicle hydrogen release system. Therefore, the present application provides a new technology that is superior to the above prior art in terms of energy consumption, installation period, safety response, and intelligent degree. SUMMARY

[0005] The technical object of the present application is to provide a magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat, which is related to the coupling control of industrial waste heat and hydrogen storage vehicle hydrogen release process, the collaborative access of multiple energy media, and the safety monitoring logic, and belongs to the technical field of hydrogen energy utilization and industrial energy saving, in order to solve the technical problems of high energy consumption, low utilization rate of industrial waste heat, low system integration, long construction period, and complex installation in industrial hydrogen release applications.

[0006] To solve the above problems, the technical solution of the present application is as follows: A magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat, comprising: a ton-level magnesium-based solid-state hydrogen storage unit, an industrial waste heat coupling thermal management unit, a multiple energy medium access unit, and a safety and intelligent control unit; The ton-level magnesium-based solid-state hydrogen storage unit is designed with a modular hydrogen storage bed and is configured to receive raw materials and store hydrogen under preset conditions; The industrial waste heat coupling thermal management unit is thermally coupled with the ton-level magnesium-based solid-state hydrogen storage unit and is configured to collect waste heat from an industrial waste heat source and provide heat for the ton-level magnesium-based solid-state hydrogen storage unit; The multiple energy medium access unit is integrated with standardized quick interfaces for hydrogen, nitrogen, electricity, and cooling water, and is configured to input external energy media to the ton-level magnesium-based solid-state hydrogen storage unit; The safety and intelligent control unit is configured to monitor the ton-level magnesium-based solid-state hydrogen storage unit and execute corresponding control according to the monitoring results.

[0007] Among them, the ton-level magnesium-based solid-state hydrogen storage unit is integrated with temperature sensors and pressure sensors, which are configured to collect the temperature and pressure of the hydrogen storage environment.

[0008] Specifically, the industrial waste heat coupling thermal management unit includes a waste heat collection module, a heat conducting oil circulation system, and a PID temperature control module; The waste heat collection module is connected with an external industrial waste heat source and is configured to obtain 200-300℃ waste heat; The heat conducting oil circulation system is connected with the waste heat collection module and is configured to transfer the waste heat obtained by the waste heat collection module to the ton-level magnesium-based solid-state hydrogen storage unit; The PID temperature control module is configured to accurately distribute the residual heat in the heat conducting oil circulation system.

[0009] The multi-energy medium access unit comprises a hydrogen interface, a nitrogen interface, a power interface and a cooling water interface. The hydrogen interface has a size of DN40, a pressure range of ≤1.2, and is equipped with a check valve. The nitrogen interface has a size of DN25, a pressure range of 0.4-0.8 MPa, and is equipped with a flow regulating valve. The current flowing through the power interface satisfies a voltage of 380V and a frequency of 50Hz. The cooling water interface has a size of DN80, a cooling water temperature of ≤30℃, and a flow of 5-30m 3 / h.

[0010] Specifically, the safety and intelligent control unit comprises: at least two redundant hydrogen concentration sensors with a detection lower limit of 0.1% Vol; an automatic emergency shut-off valve with a response time of less than 0.1 second; a PLC control cabinet; a remote monitoring module supporting 4G / ethernet communication and data uploading frequency of 1 time / minute; an AI anomaly recognition module based on LSTM neural network; a hydrogen release pressure stabilizing valve group for releasing the pressure in the ton-level magnesium-based solid-state hydrogen storage unit.

[0011] When the hydrogen concentration sensor detects that the hydrogen concentration is ≥0.4% Vol, the first level protection is triggered, the local audible and visual alarm is started, and the redundant verification of the hydrogen concentration sensor is performed. When the hydrogen concentration sensor detects that the hydrogen concentration is ≥0.8% Vol or the pressure sensor detects that the pressure exceeds 1.2 MPa, the second level protection is triggered, the automatic emergency shut-off valve is controlled to be closed, and the hydrogen release pressure stabilizing valve group is started to release pressure at a rate of not less than 0.5 MPa / s. When the remote monitoring module receives an abnormal signal, the third level protection is triggered, the alarm is pushed to the external management terminal, and the standby nitrogen purge is started.

[0012] A hydrogen release method, comprising the following steps: S1: collecting heat from an industrial waste heat source through a waste heat collection module to heat the heat conducting oil to 250-280℃; S2: adjusting the speed of the heat conducting oil circulating pump through the PID temperature control module to input heat into the ton-level magnesium-based solid-state hydrogen storage unit to make the temperature reach the target hydrogen release temperature of 220-250℃; S3: when the temperature of the ton-level magnesium-based solid-state hydrogen storage unit reaches the target value, the hydrogen interface is opened to introduce hydrogen, and the hydrogen pressure in the ton-level magnesium-based solid-state hydrogen storage unit is stabilized at 0.8-1.0 MPa; S4: Real-time monitoring of hydrogen concentration, temperature and pressure parameters by the safety and intelligent control unit, and ensuring safe operation of the system according to multi-level safety control logic.

[0013] Further, before the hydrogen release step, the following steps are also included: A1: Move the tonnage magnesium-based solid-state hydrogen storage unit to the designated location and connect the heat conducting oil pipeline through the quick flange; A2: Complete the docking of hydrogen, nitrogen, cooling water and electricity in the multi-energy medium access unit; A3: Debug the PLC control cabinet, set the parameters of the PID temperature control module, safety threshold, and complete the AI model initialization.

[0014] Further, after stopping using hydrogen, the following steps are also included: B1: Turn off the waste heat collection module, and through the PID temperature control module, the circulating pump speed of the heat conducting oil is reduced to 500r / min, so that the tonnage magnesium-based solid-state hydrogen storage unit is naturally cooled to below 80℃; B2: Start the nitrogen replacement system to blow the hydrogen pipeline at a pressure of 0.6MPa until the hydrogen concentration is <0.1% Vol; B3: Remove all joints and pipelines, separate and transport the tonnage magnesium-based solid-state hydrogen storage unit and the industrial waste heat coupled thermal management unit.

[0015] The present application has the following advantages and positive effects compared with the prior art due to the use of the above technical solutions: Compared with the electric heating in the prior art, the present application greatly reduces energy consumption and saves cost. The main effect indicators are: 1) Through waste heat-heat conducting oil-bed layer cascade heat exchange control, the bed layer is accurately maintained at 220-250℃ through the frequency conversion oil pump, the hydrogen release pressure is 0.8-1.0MPa, the energy consumption is reduced by ≥60% compared with electric heating, and the hydrogen release cost per ton is reduced by 40-60 yuan. 2) Multi-medium collaborative access and control, field construction amount is reduced by 80%, installation period is ≤2 days, and medium matching failure rate is <1%. 3) Multi-level safety control logic, 0.4% Vol hydrogen concentration alarm, 0.8% Vol or 1.2MPa automatic cut-off + pressure relief (≥0.5MPa / s), accident response <0.1s, meeting GB 50516-2021; 4) Based on AI, 12 key parameters are stored for 1 year, LSTM model gives fault type and maintenance suggestion within 2h when parameter deviation is ±10%, and operation and maintenance efficiency is improved by 60%. In summary, the system realizes low-cost driving of industrial waste heat, safe and fast release of tonnage solid-state hydrogen, and remote intelligent operation and maintenance, providing a complete solution for large-scale industrial application of hydrogen energy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention.

[0017] Figure 1 This is a structural block diagram of a magnesium-based solid hydrogen storage and release system coupled with industrial waste heat according to the present invention. Detailed Implementation

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0019] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0020] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat, as proposed in this invention. The advantages and features of this invention will become clearer from the following description and claims.

[0021] Example See Figure 1 This embodiment provides a magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat, which mainly consists of a ton-scale magnesium-based solid-state hydrogen storage unit, an industrial waste heat coupling thermal management unit, a multi-energy medium access unit, and a safety and intelligent control unit. Specifically, the industrial waste heat coupling thermal management unit is connected to an industrial waste heat source to obtain waste heat for heating the ton-scale magnesium-based solid-state hydrogen storage unit. The multi-energy medium access unit integrates multiple standardized fast interfaces, facilitating the input of external energy media to the ton-scale magnesium-based solid-state hydrogen storage unit. The safety and intelligent control unit monitors the overall implementation process of this embodiment and takes corresponding measures based on the monitoring results.

[0022] Specifically, the ton-scale magnesium-based solid-state hydrogen storage unit (also known as a ton-scale magnesium-based solid-state hydrogen storage vehicle) adopts a modular hydrogen storage bed design with a hydrogen storage capacity of 1-5 tons. It receives raw materials (hydrogen) and stores hydrogen under preset conditions. Furthermore, the ton-scale magnesium-based solid-state hydrogen storage unit integrates a temperature sensor (accuracy ±1℃) and a pressure sensor (range 0-10MPa) to collect data on the temperature and pressure of the hydrogen storage environment. The ton-scale magnesium-based solid-state hydrogen storage unit is also equipped with quick-connect flanges in sizes DN50-DN100.

[0023] Specifically, the industrial waste heat coupled thermal management unit is thermally coupled with a ton-scale magnesium-based solid-state hydrogen storage unit, collecting waste heat from an industrial waste heat source and supplying heat to the ton-scale magnesium-based solid-state hydrogen storage unit. The industrial waste heat coupled thermal management unit includes a waste heat acquisition module, a heat transfer oil circulation system, and a PID temperature control module. The waste heat acquisition module (coke oven flue gas heat exchanger, heat exchange efficiency ≥90%) is connected to an external industrial waste heat source (coke oven flue gas pipeline in a steel plant) to acquire waste heat at 200-300℃. The heat transfer oil circulation system (closed-loop circulation, heat transfer oil model L-QB300) is connected to the waste heat acquisition module, collecting waste heat by heating the heat transfer oil, and then transferring the heated heat transfer oil to the ton-scale magnesium-based solid-state hydrogen storage unit, thereby achieving heat transfer. The PID temperature control module (control accuracy ±2℃) is associated with the heat transfer oil circulation pump in the heat transfer oil circulation system. By controlling the speed of the heat transfer oil circulation pump, the heat input rate is controlled, thereby achieving precise distribution of waste heat in the heat transfer oil circulation system.

[0024] Specifically, the multi-energy medium access unit integrates standardized quick interfaces for hydrogen, nitrogen, electricity, and cooling water, with each connection taking ≤30 minutes. It is used to input external energy media into the ton-scale magnesium-based solid-state hydrogen storage unit. The hydrogen interface is DN40 in size, with a pressure range ≤1.2, and is equipped with a check valve.

[0025] The nitrogen inlet is DN25, with a pressure range of 0.4-0.8 MPa, and is equipped with a flow regulating valve. The power inlet supports a voltage of 380V and a frequency of 50Hz. The cooling water inlet is DN80, with a cooling water temperature ≤30℃ and a flow rate of 5-30 m³ / h. 3 / h. By setting up a multi-energy medium access unit, the on-site construction work can be reduced by 80%, the installation cycle can be shortened to ≤2 days, and the medium matching failure rate can be reduced to <1%.

[0026] Furthermore, this embodiment also provides a safety and intelligent control unit for monitoring the ton-scale magnesium-based solid hydrogen storage unit and executing corresponding controls based on the monitoring results. The safety and intelligent control unit includes at least two redundant locations, a hydrogen concentration sensor with a detection limit of 0.1% Vol, an automatic emergency shut-off valve with a response time of less than 0.1 seconds, a PLC control cabinet (model S7-1200), a remote monitoring module supporting 4G / Ethernet communication and a data upload frequency of once per minute, an AI anomaly recognition module based on an LSTM neural network (fault recognition accuracy ≥95%), and a hydrogen release and pressure regulating valve assembly for regulating the pressure in the ton-scale magnesium-based solid hydrogen storage unit. The safety and intelligent control unit provides multi-level protection, specifically: When the hydrogen concentration sensor detects a hydrogen concentration ≥0.4%Vol, Level 1 protection is triggered, activating a local audible and visual alarm and performing redundancy verification of the hydrogen concentration sensor. When the hydrogen concentration sensor detects a hydrogen concentration ≥0.8%Vol or the pressure sensor detects a pressure exceeding 1.2MPa, Level 2 protection is triggered, controlling the automatic emergency shut-off valve to close and activating the hydrogen release and pressure stabilizing valve group to release pressure at a rate not less than 0.5MPa / s. When the remote monitoring module receives an abnormal signal, Level 3 protection is triggered, pushing an alarm to the external management terminal and initiating backup nitrogen purging. The above protection mechanisms meet the requirements of GB 50516-2021, with an accident response time <0.1s and a safety accident incidence rate reduced to near zero.

[0027] Based on the aforementioned magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat, a hydrogen release method is proposed, comprising the following steps: First, in step S1, heat from coke oven flue gas is extracted using a waste heat acquisition module to heat the heat transfer oil to 250-280℃ (preferably 260℃), while the oil temperature is monitored in real time by a temperature sensor. Next, in step S2, the speed of the heat transfer oil circulation pump is adjusted by a PID temperature control module (the adjustment range is within 0-1500 r / min, preferably running at 1200 r / min), inputting heat into the ton-scale magnesium-based solid-state hydrogen storage unit to bring its temperature to the target hydrogen release temperature of 220-250℃. Then, when the temperature of the ton-scale magnesium-based solid-state hydrogen storage unit reaches the target value (230℃), the PLC control cabinet opens the hydrogen interface to introduce hydrogen. The hydrogen is then delivered to the downstream fuel cell system via a pressure regulating valve (outlet pressure 0.9 MPa), with the flow rate stabilized at 50 Nm³. 3 / h. Simultaneously, the hydrogen release pressure is monitored via a pressure sensor (stable at 0.8-1.0 MPa). Finally, the safety and intelligent control unit monitors hydrogen concentration, temperature, and pressure parameters in real time, and ensures safe system operation based on multi-level safety control logic. Specifically, the operating data (oil temperature 260℃±2℃, bed temperature 230℃±1℃, hydrogen pressure 0.9MPa±0.05MPa) is uploaded to the cloud platform via a 4G cloud gateway, where the AI ​​module monitors data fluctuations in real time, issuing alarms for any abnormalities.

[0028] Furthermore, prior to the hydrogen release step, the following steps are included: moving the ton-scale magnesium-based solid hydrogen storage unit (hydrogen storage vehicle) to the designated location and connecting the heat transfer oil pipeline (metal flexible hose, 5m in length, 10MPa pressure rating) via quick flanges. In the multi-energy medium access unit, the connection of hydrogen (DN40 quick connector), nitrogen (DN25 quick connector), cooling water (DN80 quick connector), and electricity (380V plug) is completed, with the overall connection time not exceeding 2 hours. After connection, the PLC control cabinet is debugged, the parameters of the PID temperature control module are set (target temperature 230℃, adjustment cycle 10s), safety thresholds (0.4% Vol hydrogen concentration alarm, 0.8% Vol cut-off), and the AI ​​model initialization is completed (importing 1000 sets of historical normal operation data).

[0029] Furthermore, after hydrogen consumption ceases, the following steps are included: After downstream users stop using hydrogen, the waste heat collection module is shut down, and the speed of the heat transfer oil circulation pump is reduced to 500 r / min via the PID temperature control module, allowing the ton-scale magnesium-based solid-state hydrogen storage unit to naturally cool down to below 80°C. At this time, the nitrogen purging system is activated to purge the hydrogen pipeline at a pressure of 0.6 MPa until the hydrogen concentration is <0.1% Vol. Finally, all joints and pipelines are disconnected, and the ton-scale magnesium-based solid-state hydrogen storage unit and the industrial waste heat coupled thermal management unit are separated and transported, with the dismantling time not exceeding 24 hours.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat, characterized in that, include: Ton-scale magnesium-based solid hydrogen storage unit, industrial waste heat coupled thermal management unit, multi-energy medium access unit, and safety and intelligent control unit; The ton-scale magnesium-based solid hydrogen storage unit adopts a modular hydrogen storage bed design and is configured to receive raw materials and store hydrogen under preset conditions. The industrial waste heat coupled thermal management unit is thermally coupled to the ton-scale magnesium-based solid hydrogen storage unit and is configured to collect waste heat from the industrial waste heat source and supply heat to the ton-scale magnesium-based solid hydrogen storage unit. The multi-energy medium access unit integrates standardized fast interfaces for hydrogen, nitrogen, electricity and cooling water, and is configured to input external energy media into the ton-scale magnesium-based solid hydrogen storage unit. The safety and intelligent control unit is configured to monitor the ton-scale magnesium-based solid hydrogen storage unit and execute corresponding controls based on the monitoring results.

2. The magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat according to claim 1, characterized in that, The ton-scale magnesium-based solid hydrogen storage unit integrates temperature and pressure sensors, which are configured to collect data on the temperature and pressure of the hydrogen storage environment.

3. The magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat according to claim 1, characterized in that, The industrial waste heat coupled thermal management unit includes a waste heat acquisition module, a heat transfer oil circulation system, and a PID temperature control module; The waste heat acquisition module is connected to an external industrial waste heat source and is configured to acquire waste heat at 200-300℃. The heat transfer oil circulation system is connected to the waste heat collection module and is configured to transfer the waste heat obtained by the waste heat collection module to the ton-level magnesium-based solid hydrogen storage unit. The PID temperature control module is configured to accurately distribute the waste heat in the heat transfer oil circulation system.

4. The magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat according to claim 1, characterized in that, The multi-energy medium access unit includes a hydrogen interface, a nitrogen interface, an electric interface, and a cooling water interface; The hydrogen inlet is DN40 in size, with a pressure range of ≤1.2, and is equipped with a check valve; The nitrogen inlet is DN25 in size, with a pressure range of 0.4-0.8MPa, and is equipped with a flow regulating valve; The current flowing through the power interface meets the requirements of a voltage of 380V and a frequency of 50Hz. The cooling water inlet is DN80, the cooling water temperature is ≤30℃, and the flow rate is 5-30m³ / h. 3 / h.

5. The magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat according to claim 2, characterized in that, The safety and intelligent control unit includes: The system includes: a hydrogen concentration sensor with at least two redundant locations and a detection limit of 0.1% Vol; an automatic emergency shut-off valve with a response time of less than 0.1 seconds; a PLC control cabinet; a remote monitoring module supporting 4G / Ethernet communication and a data upload frequency of once per minute; an AI anomaly recognition module based on LSTM neural network; and a hydrogen release and pressure stabilizing valve assembly to release pressure in the ton-level magnesium-based solid hydrogen storage unit.

6. The magnesium-based solid-state hydrogen storage and release system coupled with industrial waste heat according to claim 5, characterized in that, When the hydrogen concentration sensor detects a hydrogen concentration ≥0.4%Vol, it triggers Level 1 protection, activates a local audible and visual alarm, and performs a redundancy check on the hydrogen concentration sensor. When the hydrogen concentration sensor detects a hydrogen concentration ≥ 0.8% Vol or the pressure sensor detects a pressure exceeding 1.2 MPa, the secondary protection is triggered, controlling the automatic emergency shut-off valve to close and starting the hydrogen release and pressure stabilizing valve group to release pressure at a rate of not less than 0.5 MPa / s. When the remote monitoring module receives an abnormal signal, it triggers Level 3 protection, pushes an alarm to the external management terminal, and starts the backup nitrogen purging.

7. A method for hydrogen release based on the system according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1: Heat is collected from industrial waste heat sources through the waste heat collection module to heat the heat transfer oil to 250-280℃; S2: The PID temperature control module adjusts the speed of the heat transfer oil circulation pump to input heat into the ton-scale magnesium-based solid hydrogen storage unit, so that its temperature reaches the target hydrogen release temperature of 220-250℃; S3: When the temperature of the ton-scale magnesium-based solid-state hydrogen storage unit reaches the target value, open the hydrogen inlet to introduce hydrogen, and stabilize the hydrogen pressure in the ton-scale magnesium-based solid-state hydrogen storage unit at 0.8-1.0 MPa; S4: The system monitors hydrogen concentration, temperature, and pressure parameters in real time through a safety and intelligent control unit, and ensures safe operation of the system based on multi-level safety control logic.

8. The hydrogen release method according to claim 7, characterized in that, Before the hydrogen release step, the following steps are also included: A1: Move the ton-sized magnesium-based solid hydrogen storage unit to the designated location and connect the heat transfer oil pipeline via a quick flange; A2: Complete the connection of hydrogen, nitrogen, cooling water and electricity in the multi-energy medium access unit; A3: Debug the PLC control cabinet, set the parameters and safety thresholds of the PID temperature control module, and complete the AI ​​model initialization.

9. The hydrogen release method according to claim 7, characterized in that, After stopping the use of hydrogen, the following steps are also included: B1: Turn off the waste heat collection module and reduce the speed of the heat transfer oil circulation pump to 500r / min through the PID temperature control module, so that the ton-level magnesium-based solid hydrogen storage unit can be naturally cooled to below 80℃. B2: Turn on the nitrogen purging system and purge the hydrogen pipeline at a pressure of 0.6 MPa until the hydrogen concentration is <0.1% Vol; B3: Dismantle all joints and pipelines, and separate and transfer the ton-level magnesium-based solid hydrogen storage unit and the industrial waste heat coupled thermal management unit.

Images