Hydrogen storage facility leakage diffusion safety protection system and protection method

Abstract

The invention relates to the technical field, in particular to a hydrogen storage facility leakage diffusion safety protection system and method, and the hydrogen storage facility leakage diffusion safety protection system comprises an airflow pipeline system which comprises a plurality of fans, a flow guide pipeline and a plurality of airflow outlet steering devices, the fans are connected with the flow guide pipeline in different directions, and the airflow outlet steering devices are connected with the flow guide pipeline; the flow guide pipeline is provided with a plurality of air outlets, the plurality of airflow outlet steering devices are respectively mounted at the plurality of air outlets, and the flow guide pipeline is arranged around the hydrogen storage facility; the data collection system comprises a plurality of hydrogen concentration sensors, the hydrogen concentration sensors are arranged around the hydrogen storage facility, and the hydrogen concentration sensors are used for measuring the hydrogen concentration; the control system is connected with the fan and used for controlling on-off and output power of the fan; the control system is connected with the airflow outlet steering device and used for controlling the airflow outlet steering device to adjust the airflow velocity of the air outlet. The control system is connected with the hydrogen concentration sensor and used for receiving and processing signals detected by the hydrogen concentration sensor.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to a hydrogen storage facility leakage and diffusion safety protection system and protection method. Background Art

[0002] Once liquid hydrogen leaks, it will quickly vaporize to form a large amount of low-temperature hydrogen cloud, accompanied by condensation and frost of moisture in the air. Since hydrogen is colorless and odorless and diffuses quickly, leakage is often difficult to detect. It is more likely to accumulate in low-lying areas or enclosed spaces to form flammable gas clouds, which can easily cause fires or explosions. The explosion limit of hydrogen is wide (4%-75%). Once the concentration critical value is reached and the minimum ignition energy (0.02J) is reached, serious explosion accidents may occur. In addition, the extremely low temperature of liquid hydrogen will create a risk of frostbite around the leakage area, and cause embrittlement and damage to surrounding materials, exacerbating the failure of equipment and structures. Liquid hydrogen leakage may also cause a sudden drop in oxygen concentration, leading to suffocation of personnel, especially in enclosed spaces. In order to prevent these potential hazards, cofferdams, ventilation and isolation measures should be taken quickly after the leakage occurs to control the spread and reduce the impact of the accident.

[0003] In previous protection measures for liquid hydrogen storage facilities, cofferdams are usually earthen structures arranged around liquid hydrogen storage tanks or pipelines, with the aim of confining liquid hydrogen to a specific area in the event of a leak. Earthen cofferdams are relatively economical and have good thermal insulation properties, which can effectively slow the spread of liquid hydrogen. The design of the cofferdam will consider sufficient height and capacity to accommodate liquid hydrogen in the event of a leak, control its evaporation rate, and reduce the risk of rising hydrogen concentrations. In addition, fire-proof isolation dams are often set up around the cofferdam to prevent the hydrogen cloud from spreading to a larger area and isolate possible fire sources. This cofferdam design provides initial protection and buys time for further ventilation, dilution and emergency treatment.

[0004] However, the protective effect of the cofferdam on liquid hydrogen is relatively limited, because the hydrogen produced after the leakage of liquid hydrogen is highly mobile and diffusive, and liquid hydrogen will undergo a two-stage diffusion process after the leakage. In the early stage, the hydrogen formed by the evaporation of liquid hydrogen will accumulate in the low place in the form of heavy gas diffusion due to its low temperature and heavier than the surrounding air. However, as the temperature rises, the density of hydrogen decreases and it turns into light gas diffusion, which is easy to cross the cofferdam and continue to spread in the leeward direction. However, the traditional cofferdam design has limitations in safety protection. The core principle of the cofferdam is to rely on physical barriers to block gas diffusion. However, due to the low density and strong diffusivity of hydrogen, as well as the temperature change after the leakage, this method is difficult to effectively curb the disordered movement of hydrogen. As a result, hydrogen continues to spread in the leeward direction across the cofferdam barrier, forming an uncontrolled flammable gas cloud. This behavior not only increases the scope of danger after the leakage, but also may rapidly expand the risk of fire or explosion. Therefore, the protection capacity of traditional cofferdams cannot cope with this complex diffusion characteristic.

[0005] Therefore, it is difficult to truly reduce the risk by relying solely on cofferdams to prevent the spread of hydrogen. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a hydrogen storage facility leakage and diffusion safety protection system and protection method, which aims to solve the problem that it is difficult to truly reduce the risk by relying solely on cofferdams to block hydrogen diffusion.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] In a first aspect, a hydrogen storage facility leakage and diffusion safety protection system comprises:

[0009] An airflow pipeline system, comprising: a plurality of fans, a guide pipeline and a plurality of airflow outlet steering devices, wherein the plurality of fans are connected to the guide pipeline at different positions, the guide pipeline is provided with a plurality of air outlets, the plurality of airflow outlet steering devices are respectively installed at the air outlets, and the guide pipeline is arranged around the hydrogen storage facility;

[0010] The data collection system comprises: a plurality of hydrogen concentration sensors, the plurality of hydrogen concentration sensors being arranged around the hydrogen storage facility, the hydrogen concentration sensors being used to measure hydrogen concentration;

[0011] A control system, wherein the control system is connected to the fan and is used to control the switch and output power of the fan; the control system is connected to the airflow outlet steering device and is used to control the airflow outlet steering device to adjust the airflow velocity of the air outlet; the control system is connected to the hydrogen concentration sensor and is used to receive and process the signal detected by the hydrogen concentration sensor.

[0012] Furthermore, the data collection system also includes: a sensor array, the sensor array includes a plurality of mounting poles, the plurality of mounting poles are arranged around the hydrogen storage facility, a plurality of hydrogen concentration sensors are installed in the sensor array, and any one of the mounting poles is equipped with the hydrogen concentration sensor at a different height.

[0013] Furthermore, the data collection system also includes:

[0014] A plurality of temperature sensors, the temperature sensors are used to measure temperature, the temperature sensors are connected to the control system, the control system receives and processes the signals detected by the temperature sensors, the plurality of temperature sensors are installed in the sensor array, and any one of the mounting poles is installed with the temperature sensors at different heights;

[0015] A plurality of anemometers are provided, wherein the anemometers are used to measure wind speed and wind direction, the anemometers are connected to the control system, the control system receives and processes the signals detected by the anemometers, and the plurality of anemometers are respectively installed on the plurality of installation poles.

[0016] Furthermore, the data collection system also includes: multiple wind sensors, which are used to measure wind speed, wind direction, temperature, humidity, and air pressure. The wind sensors are connected to the control system, and the control system receives and processes the signals of the wind sensors. Multiple wind sensors are installed in the sensor array, and any one of the mounting poles is equipped with the wind sensors at different heights.

[0017] Furthermore, the control system includes: a PLC controller, and the PLC controller is respectively connected to the airflow pipeline system and the data collection system.

[0018] Furthermore, the control system includes: a video monitoring system, the video monitoring system includes a plurality of cameras, the plurality of cameras are arranged around the hydrogen storage facility, and the cameras are connected to the PLC controller.

[0019] Furthermore, the distance between each section of the diversion pipeline and the hydrogen storage facility is greater than a certain distance.

[0020] In a second aspect, a protection method for a hydrogen storage facility leakage and diffusion safety protection system comprises:

[0021] Step 1: The data collection system collects hydrogen concentration and meteorological information around the hydrogen storage facility in real time, and transmits the hydrogen concentration and meteorological information data to the control system;

[0022] Step 2: The control system receives and processes the hydrogen concentration and meteorological information data transmitted by the data collection system to determine whether the hydrogen storage facility is leaking;

[0023] Step 3: If it is determined that the hydrogen storage facility has no leakage, the control system periodically controls the fan to work to test the performance of the whole machine, and controls the whole machine to be in a standby state, and executes steps 1 and 2;

[0024] Step 4: If it is determined that the hydrogen storage facility leaks, the control system controls the fan to work at the maximum output power to form an air wall;

[0025] Step 5: The air wall airflow control model of the control system automatically adjusts the output power of the fan and the direction of the airflow outlet steering device according to the data collected by the data collection system;

[0026] Step 6: The control system confirms that there is no residual hydrogen through the data collected by the data collection system, manually adjusts the fan and the airflow outlet steering device to the standby state, and executes steps 1 and 2.

[0027] Furthermore, in step 5, the execution steps of the air wall airflow control model include:

[0028] Read data collected by the data collection system in real time;

[0029] After the air wall is activated, the fan is controlled to maintain maximum power output in the initial stage so as to establish the air wall as quickly as possible;

[0030] Automatically adjust the air wall to match the air flow speed and air flow angle to the current situation based on historical actual data, experimental data, and simulation data;

[0031] Evaluate the effect of the current air wall in real time based on actual data;

[0032] The current data is imported into the numerical model for real-time prediction of the effect of the air wall, and the effect of the air wall is calculated and predicted in real time;

[0033] Adjust the air velocity and angle of the air wall in real time according to actual data and calculation results of the numerical model;

[0034] After adjustment, the actual effect and the calculation results of the numerical model are evaluated again, and real-time interaction is carried out to achieve the best real-time effect.

[0035] Furthermore, the execution steps of the numerical model include:

[0036] Import the data collected in real time by the data collection system into the numerical model;

[0037] Numerical models establish real-time equations based on real-time data;

[0038] The numerical model obtains the real-time velocity field and concentration field by discretizing and solving the equations;

[0039] The numerical model evaluates the effect of the air wall based on the velocity and concentration fields.

[0040] The present invention discloses a hydrogen storage facility leakage and diffusion safety protection system and protection method, which has the following beneficial effects:

[0041] The control system can determine whether a hydrogen storage facility has leaked based on data collected by the hydrogen concentration sensor of the data collection system, and when it is determined that a hydrogen storage facility has leaked, it controls the fan of the airflow pipeline system to work in the guide pipeline to generate airflow, and at the same time controls the airflow outlet steering device to adjust the airflow direction of the air outlet. Since the guide pipeline is arranged around the hydrogen storage facility and the guide pipeline is provided with multiple air outlets, an air wall can be formed around the hydrogen storage facility, so that the leaked hydrogen flows upward under the influence of the airflow. Since multiple hydrogen concentration sensors are arranged around the hydrogen storage facility, the control system can determine the hydrogen concentration distribution and diffusion direction based on the differences in data collected by hydrogen concentration sensors at different positions, and adjust the output power of the fans in each direction and the airflow outlet steering device according to the hydrogen concentration distribution and diffusion direction, and then adjust the airflow velocity of the air outlet of the guide pipeline to cope with the complex diffusion characteristics of hydrogen, thereby diluting the hydrogen concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the hydrogen storage facility leakage and diffusion safety protection system of the present invention;

[0043] Figure 2 is a structural block diagram of a hydrogen storage facility leakage and diffusion safety protection system according to Embodiment 1 of the present invention;

[0044] Figure 3 is a structural block diagram of a hydrogen storage facility leakage and diffusion safety protection system according to Embodiment 2 of the present invention;

[0045] Figure 4 It is a flow chart of the protection method of the hydrogen storage facility leakage and diffusion safety protection system of the present invention;

[0046] Figure 5 is an execution flow chart of the air wall airflow control model of the present invention;

[0047] Figure 6 is an execution flow chart of the numerical model of the present invention;

[0048] Figure 7 It is a comparison diagram of the protective effects of the traditional cofferdam and the air wall of the present invention under the same conditions;

[0049] Figure 8 It is a protection effect diagram of the air flow velocity of the hydrogen storage facility leakage and diffusion safety protection system of the present invention corresponding to the leakage time of the hydrogen storage facility;

[0050] Fig. 9 It is a protection effect diagram of the blower opening time, air flow velocity and hydrogen storage facility leakage time corresponding to the hydrogen storage facility leakage and diffusion safety protection system of the present invention;

[0051] Fig.10It is a protection effect diagram corresponding to the air flow velocity, hydrogen storage facility leakage time and atmospheric wind speed of the hydrogen storage facility leakage and diffusion safety protection system of the present invention.

[0052] Description of reference numerals:

[0053] 1. Airflow pipeline system; 11. Fan; 12. Flow guide pipeline; 13. Air outlet; 2. Data collection system; 21. Installation pole; 3. Control system; 4. Hydrogen storage facility. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0055] like Figure 1 As shown, the present invention provides a hydrogen storage facility leakage and diffusion safety protection system, comprising:

[0056] The airflow pipeline system 1 comprises: a plurality of fans 11, a guide pipeline 12 and a plurality of airflow outlet steering devices, wherein the plurality of fans 11 are connected to the guide pipeline 12 at different positions, the guide pipeline 12 is provided with a plurality of air outlets 13, the plurality of airflow outlet steering devices are respectively installed at the air outlets 13, and the guide pipeline 12 is arranged around the hydrogen storage facility 4;

[0057] The data collection system 2 includes: a plurality of hydrogen concentration sensors, the plurality of hydrogen concentration sensors are arranged around the hydrogen storage facility 4, and the hydrogen concentration sensors are used to measure the hydrogen concentration;

[0058] The control system 3 is connected to the fan 11 and is used to control the switch and output power of the fan 11; the control system 3 is connected to the airflow outlet steering device and is used to control the airflow outlet steering device to adjust the airflow velocity of the air outlet 13; the control system 3 is connected to the hydrogen concentration sensor and is used to receive and process the signal detected by the hydrogen concentration sensor.

[0059] The control system 3 can determine whether the hydrogen storage facility 4 is leaking based on the data collected by the hydrogen concentration sensor of the data collection system 2, and when it is determined that the hydrogen storage facility 4 is leaking, the fan 11 of the airflow pipeline system 1 is controlled to work in the guide pipeline 12 to generate airflow, and at the same time, the airflow outlet steering device is controlled to adjust the airflow direction of the air outlet 13. Since the guide pipeline 12 is arranged around the hydrogen storage facility 4 and the guide pipeline 12 is provided with a plurality of air outlets 13, an air wall can be formed around the hydrogen storage facility 4, so that the leaked hydrogen flows upward under the drive of the airflow. Because a plurality of hydrogen concentration sensors are arranged around the hydrogen storage facility 4, the control system 3 can determine the hydrogen concentration distribution and diffusion direction according to the differences in the data collected by the hydrogen concentration sensors at different positions, and adjust the output power of the fans 11 in various directions according to the hydrogen concentration distribution and diffusion direction, and then adjust the air flow velocity in the air duct of the guide pipeline 12, and at the same time adjust the air flow outlet steering device and then adjust the air flow velocity of the air outlet 13 of the guide pipeline 12 to adjust the strength of the air wall, cope with the complex diffusion characteristics of hydrogen, and then dilute the concentration of hydrogen.

[0060] It should be noted that if Figure 8 and Fig. 9 As shown, Figure 8 A represents the air flow velocity, and t represents the leakage time; Fig. 9 Where A represents air flow velocity, t represents leakage time, and S represents opening time.

[0061] The air wall does not actually need to be opened continuously. After the liquid hydrogen leak is discovered, opening it as soon as possible can also achieve good protection. The opening time should be as timely as possible, because the establishment of the air wall takes time. The greater the air flow speed, the shorter the time required for establishment. It is sufficient to ensure that the fan 11 is opened within 5 seconds of the hydrogen storage facility 4 leaking.

[0062] Because in the early stage of liquid hydrogen leakage, the hydrogen formed by the evaporation of liquid hydrogen is heavier than the surrounding air due to its lower temperature, and will accumulate in the low place in the form of heavy gas diffusion. Therefore, after the control system 3 determines that the hydrogen storage facility 4 is leaking, the control system 3 controls the fan 11 to work at the maximum output power, so that the air wall can drive the hydrogen in the form of heavy gas diffusion to flow upward at the fastest speed, avoiding the accumulation of hydrogen in the low place. After a period of time, the control system 3 can determine the hydrogen concentration distribution and diffusion direction according to the differences in the data collected by the hydrogen concentration sensors at different positions, adjust the output power of the fans 11 in various directions according to the hydrogen concentration distribution and diffusion direction, and then adjust the air flow speed of the air outlet 13 of the guide pipeline 12 to cope with the complex diffusion characteristics of hydrogen, thereby diluting the concentration of hydrogen.

[0063] When the weather is bad, for example, the wind speed is greater than 5m / s, the traditional cofferdam loses its protective effect, and the hydrogen cloud continues to move downwind close to the ground, spreading a long distance downstream until it is diluted by the air near the ground. When the air wall is used, the air flow speed of the air wall can be increased to resist the huge impact of the atmospheric wind speed, so that the hydrogen moves into the air, greatly reducing the harm downstream.

[0064] like Figure 7 As shown, the protection effect of the hydrogen storage facility leakage and diffusion safety protection system of the present invention is better than that of the traditional cofferdam. When the air wall is used, the volume of the hydrogen cloud is smaller and it leaves the ground earlier, that is, the safety is significantly higher when the air wall is used. When the cofferdam is used, it takes more than one minute for the hydrogen cloud to be completely reduced to below the flammable concentration. When the air wall is used, the concentration of the hydrogen cloud can be reduced to below the flammable concentration range within 15 seconds, greatly reducing the harm after the release of liquid hydrogen.

[0065] In some specific embodiments, the number of fans 11 can be 4, and the 4 fans 11 are respectively located in the four directions of southeast, northwest, and northeast. The 4 fans 11 can divide the diversion pipeline 12 into four sections, and each fan 11 is responsible for a section of the diversion pipeline 12. If the control system 3 can judge that the hydrogen concentration collected by the hydrogen concentration sensor in the northwest is higher than that in other directions, it can be determined that the hydrogen leakage is concentrated in the northwest or the hydrogen diffuses to the northwest. Therefore, the control system 3 can control the fan 11 responsible for the diversion pipeline 12 in the northwest direction to work at the maximum output power. It is understandable that the number of fans 11 can also be 2, 3, 5, 6, etc., and the number of fans 11 can be increased or decreased according to on-site needs.

[0066] like Figure 1 and Fig.10 As shown, in some embodiments, the data collection system 2 also includes: a sensor array, the sensor array includes a plurality of mounting poles 21, the plurality of mounting poles 21 are arranged around the hydrogen storage facility 4, a plurality of hydrogen concentration sensors are installed in the sensor array, and any one of the mounting poles 21 is installed with a hydrogen concentration sensor at a different height.

[0067] Since the diffusion of hydrogen is not in a two-dimensional plane, but in a three-dimensional form, the data collection system 2 also includes a sensor array, and multiple mounting poles 21 are arranged around the hydrogen storage facility 4, and multiple hydrogen concentration sensors are installed in the sensor array, and any mounting pole 21 is equipped with a hydrogen concentration sensor at different heights. Thus, the hydrogen concentration at different three-dimensional spatial positions can be measured three-dimensionally, so that the control system 3 can more accurately analyze the diffusion direction of hydrogen and the distribution of each hydrogen concentration, and facilitate the control system 3 to better control the output power of the fan 11 and the steering of the airflow outlet steering device, so as to timely contain the hydrogen diffused to the surroundings and dilute the hydrogen into the air.

[0068] Fig.10 A represents airflow velocity, t represents leakage time, and U represents atmospheric wind speed. When the atmospheric wind speed is different, the required airflow velocity is different. The greater the wind speed, the greater the airflow velocity required to establish an effective air wall. The relationship between wind speed and required airflow velocity is nonlinear and needs to be set in combination with actual effects. In theory, the airflow velocity should not be less than twice the wind speed.

[0069] like Figure 2 As shown, in embodiment 1, the data collection system 2 further includes:

[0070] A plurality of temperature sensors, the temperature sensors are used to measure temperature, the temperature sensors are connected to the control system 3, the control system 3 receives and processes the signals detected by the temperature sensors, the plurality of temperature sensors are installed in the sensor array, and any one of the mounting poles 21 is installed with temperature sensors at different heights;

[0071] Multiple anemometers are used to measure wind speed and wind direction. The anemometers are connected to a control system 3 . The control system 3 receives and processes signals detected by the anemometers. The multiple anemometers are respectively installed on multiple installation poles 21 .

[0072] Since the diffusion of hydrogen is affected by temperature, wind speed and wind direction, the higher the temperature, the faster the hydrogen diffuses, and the faster the wind speed, the faster the hydrogen diffuses. At the same time, the wind direction will affect the diffusion direction of hydrogen. Therefore, the data collection system 2 also has a temperature sensor and an anemometer in the sensor array. The temperature data, wind speed data and wind direction data collected by the temperature sensor and the anemometer can enable the control system 3 to better judge the diffusion of hydrogen, so that the control system 3 can more accurately adjust the output power of the fan 11 and the steering of the airflow outlet steering device, so as to timely curb the hydrogen diffused to the surroundings and dilute the hydrogen into the air.

[0073] like Figure 3As shown, in Example 2, the data collection system 2 also includes: multiple wind sensors, the wind sensors are used to measure wind speed, wind direction, temperature, humidity, and air pressure, the wind sensors are connected to the control system 3, the control system 3 receives and processes the signals of the wind sensors, and multiple sensor arrays are arranged and installed in the sensor array, and any one of the mounting poles 21 is equipped with a wind sensor at different heights.

[0074] Since the diffusion of hydrogen is affected not only by temperature, wind speed and wind direction, but also by humidity and air pressure, the data collection system 2 also has a wind sensor in the sensor array. The wind sensor can measure wind speed, wind direction, temperature, humidity and air pressure. The wind speed data, wind direction data, temperature data, humidity data and air pressure data collected by the wind sensor can enable the control system 3 to better judge the diffusion of hydrogen, and facilitate the control system 3 to more accurately adjust the output power of the fan 11 and the steering of the airflow outlet steering device, so as to timely curb the hydrogen that diffuses to the surroundings and dilute the hydrogen into the air.

[0075] It should be noted that, in some embodiments, the meteorological sensor can also collect rainfall data, so as to further improve the control system 3's judgment on hydrogen diffusion.

[0076] like Figure 2 and Figure 3 As shown, in some embodiments, the control system 3 includes: a PLC controller, and the PLC controller is connected to the airflow pipeline system 1 and the data collection system 2 respectively.

[0077] like Figure 2 and Figure 3 As shown, in some embodiments, the control system 3 includes: a video monitoring system, the video monitoring system includes a plurality of cameras, the plurality of cameras are arranged around the hydrogen storage facility 4, and the cameras are connected to the PLC controller.

[0078] The camera can facilitate users to view the on-site conditions of the hydrogen storage facility 4 in real time, and facilitate users to conduct real-time regulation of the leakage and diffusion safety protection system of the hydrogen storage facility 4.

[0079] Specifically, the distance between each section of the flow guide pipeline 12 and the hydrogen storage facility 4 is greater than a certain distance.

[0080] The layout size of the air wall is determined based on the site selection and capacity of the liquid hydrogen storage facility. In principle, the air wall should be a certain distance away from the hydrogen storage facility. As the capacity of the storage tank increases, the radius of the air wall increases.

[0081] like Figure 4 As shown, the present invention provides a protection method for a hydrogen storage facility leakage and diffusion safety protection system, comprising:

[0082] Step 1: The data collection system collects hydrogen concentration and meteorological information around the hydrogen storage facility in real time, and transmits the hydrogen concentration and meteorological information data to the control system;

[0083] Step 2: The control system receives and processes the hydrogen concentration and meteorological information data transmitted by the data collection system to determine whether the hydrogen storage facility is leaking;

[0084] Step 3: If it is determined that the hydrogen storage facility has no leakage, the control system periodically controls the fan to work to test the performance of the whole machine, and controls the whole machine to be in a standby state, and executes steps 1 and 2;

[0085] Step 4: If it is determined that the hydrogen storage facility leaks, the control system controls the fan to work at the maximum output power to form an air wall;

[0086] Step 5: The air wall airflow control model of the control system automatically adjusts the output power of the fan and the direction of the airflow outlet steering device according to the data collected by the data collection system;

[0087] Step 6: The control system confirms that there is no residual hydrogen through the data collected by the data collection system, manually adjusts the fan and the airflow outlet steering device to the standby state, and executes steps 1 and 2.

[0088] All the workflows are as described above. Except for the final shutdown of the fan to put it in standby mode, other processes are automated. The reason is that after liquid hydrogen leaks, the hydrogen diffuses very quickly, often within a dozen or even ten seconds to a large area. The air wall needs to be established before large-scale diffusion, and manual control is often too late. In addition to automatic control, manual intervention can be carried out at any stage.

[0089] like Figure 5 As shown, in step 5, the execution steps of the air wall airflow control model include:

[0090] Read data collected by the data collection system in real time;

[0091] After the air wall is activated, the fan is controlled to maintain maximum power output in the initial stage so as to establish the air wall as quickly as possible;

[0092] Automatically adjust the air wall to match the air flow speed and air flow angle to the current situation based on historical actual data, experimental data, and simulation data;

[0093] Evaluate the effect of the current air wall in real time based on actual data;

[0094] The current data is imported into the numerical model for real-time prediction of the effect of the air wall, and the effect of the air wall is calculated and predicted in real time;

[0095] Adjust the air velocity and angle of the air wall in real time according to actual data and calculation results of the numerical model;

[0096] After adjustment, the actual effect and the calculation results of the numerical model are evaluated again, and real-time interaction is carried out to achieve the best real-time effect.

[0097] like Figure 6 As shown in Figure 2, the implementation steps of the numerical model include:

[0098] Import the data collected in real time by the data collection system into the numerical model;

[0099] Numerical models establish real-time equations based on real-time data;

[0100] The numerical model obtains the real-time velocity field and concentration field by discretizing and solving the equations;

[0101] The numerical model evaluates the effect of the air wall based on the velocity and concentration fields.

[0102] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hydrogen storage facility leakage and diffusion safety protection system, characterized in that: include: An airflow pipeline system, comprising: a plurality of fans, a guide pipeline and a plurality of airflow outlet steering devices, wherein the plurality of fans are connected to the guide pipeline at different positions, the guide pipeline is provided with a plurality of air outlets, the plurality of airflow outlet steering devices are respectively installed at the plurality of air outlets, and the guide pipeline is arranged around the hydrogen storage facility; The data collection system comprises: a plurality of hydrogen concentration sensors, the plurality of hydrogen concentration sensors being arranged around the hydrogen storage facility, the hydrogen concentration sensors being used to measure hydrogen concentration; A control system, wherein the control system is connected to the fan and is used to control the switch and output power of the fan; the control system is connected to the airflow outlet steering device and is used to control the airflow outlet steering device to adjust the airflow velocity of the air outlet; the control system is connected to the hydrogen concentration sensor and is used to receive and process the signal detected by the hydrogen concentration sensor.

2. The hydrogen storage facility leakage and diffusion safety protection system according to claim 1 is characterized in that: The data collection system also includes: a sensor array, the sensor array includes a plurality of mounting poles, the plurality of mounting poles are arranged around the hydrogen storage facility, a plurality of hydrogen concentration sensors are installed in the sensor array, and any one of the mounting poles is installed with the hydrogen concentration sensor at a different height.

3. The hydrogen storage facility leakage and diffusion safety protection system according to claim 2 is characterized in that: The data collection system also includes: A plurality of temperature sensors, the temperature sensors are used to measure temperature, the temperature sensors are connected to the control system, the control system receives and processes the signals detected by the temperature sensors, the plurality of temperature sensors are installed in the sensor array, and any one of the mounting poles is installed with the temperature sensors at different heights; A plurality of anemometers are provided, wherein the anemometers are used to measure wind speed and wind direction, the anemometers are connected to the control system, the control system receives and processes the signals detected by the anemometers, and the plurality of anemometers are respectively installed on the plurality of installation poles.

4. The hydrogen storage facility leakage and diffusion safety protection system according to claim 2, characterized in that: The data collection system also includes: multiple wind sensors, which are used to measure wind speed, wind direction, temperature, humidity, and air pressure. The wind sensors are connected to the control system, and the control system receives and processes the signals of the wind sensors. Multiple wind sensors are installed in the sensor array, and any one of the mounting poles is equipped with the wind sensors at different heights.

5. The hydrogen storage facility leakage and diffusion safety protection system according to claim 1, characterized in that: The control system includes: a PLC controller, and the PLC controller is connected to the airflow pipeline system and the data collection system respectively.

6. The hydrogen storage facility leakage and diffusion safety protection system according to claim 5, characterized in that: The control system includes: a video monitoring system, which includes a plurality of cameras, and the plurality of cameras are arranged around the hydrogen storage facility, and the cameras are connected to the PLC controller.

7. The hydrogen storage facility leakage and diffusion safety protection system according to claim 1, characterized in that: The distance between each section of the flow guide pipeline and the hydrogen storage facility is greater than a certain distance.

8. A method for protecting a hydrogen storage facility leakage and diffusion safety protection system, characterized in that: include: Step 1: The data collection system collects hydrogen concentration and meteorological information around the hydrogen storage facility in real time, and transmits the hydrogen concentration and meteorological information data to the control system; Step 2: The control system receives and processes the hydrogen concentration and meteorological information data transmitted by the data collection system to determine whether the hydrogen storage facility is leaking; Step 3: If it is determined that the hydrogen storage facility has no leakage, the control system periodically controls the fan to work to test the performance of the whole machine, and controls the whole machine to be in a standby state, and executes steps 1 and 2; Step 4: If it is determined that the hydrogen storage facility leaks, the control system controls the fan to work at the maximum output power to form an air wall; Step 5: The air wall airflow control model of the control system automatically adjusts the output power of the fan and the direction of the airflow outlet steering device according to the data collected by the data collection system; Step 6: The control system confirms that there is no residual hydrogen through the data collected by the data collection system, manually adjusts the fan and the airflow outlet steering device to the standby state, and executes steps 1 and 2.

9. The protection method of the hydrogen storage facility leakage and diffusion safety protection system according to claim 8, characterized in that: In step 5, the execution steps of the air wall airflow control model include: Read data collected by the data collection system in real time; After the air wall is activated, the fan is controlled to maintain maximum power output in the initial stage so as to establish the air wall as quickly as possible; Automatically adjust the air wall to match the air flow speed and air flow angle to the current situation based on historical actual data, experimental data, and simulation data; Evaluate the effect of the current air wall in real time based on actual data; The current data is imported into the numerical model for real-time prediction of the effect of the air wall, and the effect of the air wall is calculated and predicted in real time; Adjust the air velocity and angle of the air wall in real time according to actual data and calculation results of the numerical model; After adjustment, the actual effect and the calculation results of the numerical model are evaluated again, and real-time interaction is carried out to achieve the best real-time effect.

10. The protection method of the hydrogen storage facility leakage and diffusion safety protection system according to claim 9, characterized in that: The implementation steps of the numerical model include: Import the data collected in real time by the data collection system into the numerical model; Numerical models establish real-time equations based on real-time data; The numerical model obtains the real-time velocity field and concentration field by discretizing and solving the equations; The numerical model evaluates the effect of the air wall based on the velocity and concentration fields.

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