CN115607875A - Whole station type nitrogen explosion suppression system - Google Patents
Whole station type nitrogen explosion suppression system Download PDFInfo
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- CN115607875A CN115607875A CN202211181376.8A CN202211181376A CN115607875A CN 115607875 A CN115607875 A CN 115607875A CN 202211181376 A CN202211181376 A CN 202211181376A CN 115607875 A CN115607875 A CN 115607875A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
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- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to the technical field of hydrogen energy, in particular to a whole station type nitrogen explosion suppression system which comprises a construction module, a simulation calculation module, a detector position confirmation module, a hydrogen concentration confirmation module and a control module, wherein the simulation calculation module is used for carrying out simulation calculation on a scene library to confirm a hydrogen gathering position and hydrogen leakage parameters; the detector position confirming module confirms the installation positions of the hydrogen concentration detector and the flame detector based on the hydrogen gathering position and the hydrogen leakage parameter; a hydrogen concentration confirmation module acquires a hydrogen concentration detection value of the hydrogen concentration detector; the control module controls on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position based on the hydrogen concentration detection value and the alarm signal of the flame detector, so that development of the whole station type nitrogen explosion suppression system when the skid-mounted modular hydrogen filling station adopts fixed station arrangement is realized, and the problem of nitrogen waste caused by the fact that the existing nitrogen explosion suppression system does not carry out targeted nitrogen injection is solved.
Description
Technical Field
The invention relates to the technical field of hydrogen energy sources, in particular to a whole station type nitrogen explosion suppression system.
Background
The hydrogen station is used as an infrastructure of a hydrogen fuel cell vehicle and is a link for connecting upstream hydrogen and downstream fuel vehicle users, once hydrogen leakage occurs, the hydrogen station can be caused, and therefore the hydrogen leakage condition of the hydrogen station needs to be detected and inhibited through a nitrogen explosion suppression system.
The existing nitrogen explosion suppression system directly sprays nitrogen after hydrogen leakage or fire occurs, does not position the specific position where the hydrogen leakage or fire occurs, and purposefully sprays nitrogen, thereby causing nitrogen waste.
Disclosure of Invention
The invention aims to provide a whole-station type nitrogen explosion suppression system, which aims to complete the development of a whole-station type nitrogen explosion suppression system and solve the problem that the existing nitrogen explosion suppression system does not carry out targeted nitrogen injection to cause nitrogen waste.
In order to achieve the aim, the invention provides a whole station type nitrogen explosion suppression system which comprises a construction module, a simulation calculation module, a detector position confirmation module, a hydrogen concentration confirmation module and a control module, wherein the construction module, the simulation calculation module, the detector position confirmation module, the hydrogen concentration confirmation module and the control module are sequentially connected;
the construction module is used for constructing a scene library on site;
the simulation calculation module is used for performing simulation calculation on the scene library and confirming a hydrogen gathering position and a hydrogen leakage parameter;
the detector position confirming module confirms the installation positions of the hydrogen concentration detector and the flame detector based on the hydrogen gathering position and the hydrogen leakage parameter;
the hydrogen concentration confirming module is used for acquiring a hydrogen concentration detection value of the hydrogen concentration detector;
and the control module controls the on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position based on the hydrogen concentration detection value and the alarm signal of the flame detector.
The building module comprises a building submodule and an establishing submodule, and the establishing submodule is connected with the building submodule;
the construction submodule is used for constructing a three-dimensional model according to a construction drawing on site;
and the establishing submodule is used for establishing a hydrogen leakage scene library in the three-dimensional model to obtain a scene library.
The simulation calculation module comprises a selection submodule, a simulation calculation submodule, a position confirmation submodule and a parameter traversal submodule, wherein the selection submodule, the simulation calculation submodule and the position confirmation submodule are sequentially connected, and the parameter traversal submodule is connected with the selection submodule;
the selection submodule is used for selecting a hydrogen leakage scene from the scene library;
the analog computation submodule is used for performing analog computation on the hydrogen leakage scene to obtain a computed value;
the position confirmation submodule confirms the hydrogen accumulation position in the scene based on the calculated value;
and the parameter traversing submodule is used for traversing the hydrogen leakage parameter library based on the hydrogen leakage scene to obtain the hydrogen leakage parameters.
The detector position confirmation module comprises a superposition analysis unit and a position confirmation unit, and the superposition analysis unit is connected with the position confirmation unit;
the superposition analysis unit is used for carrying out superposition analysis on the hydrogen gathering position and the hydrogen leakage parameters to obtain an analysis result and setting a threshold value of hydrogen concentration;
the position confirmation unit confirms the installation positions of the hydrogen concentration detector and the flame detector based on the analysis result.
The control module comprises a threshold judgment sub-module, an electromagnetic valve control sub-module and a nitrogen release sub-module, wherein the threshold judgment sub-module, the electromagnetic valve control sub-module and the nitrogen release sub-module are sequentially connected;
the threshold value judgment submodule judges the hydrogen concentration detection value based on the threshold value, and triggers the electromagnetic valve control submodule and the nitrogen release submodule when the hydrogen concentration detection value is larger than the threshold value;
the electromagnetic valve control submodule is used for controlling the on-off of the electromagnetic valve on the site;
the nitrogen release submodule is used for releasing nitrogen to the hydrogen gathering position.
The whole station type nitrogen explosion suppression system provided by the invention has the advantages that a site scene library is constructed through the construction module; the simulation calculation module carries out simulation calculation on the scene library and confirms a hydrogen gathering position and hydrogen leakage parameters; the detector position confirming module confirms the installation positions of the hydrogen concentration detector and the flame detector based on the hydrogen gathering position and the hydrogen leakage parameter; the hydrogen concentration confirming module acquires a hydrogen concentration detection value of the hydrogen concentration detector; the control module controls the on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position based on the hydrogen concentration detection value and the alarm signal of the flame detector, and the control module can release nitrogen to the hydrogen gathering position in a targeted manner under the condition of ensuring that hydrogen cannot be continuously leaked, so that the problem of nitrogen waste caused by the fact that the existing nitrogen explosion suppression system does not carry out targeted nitrogen injection is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a whole station type nitrogen explosion suppression system provided by the invention.
Fig. 2 is a schematic structural diagram of a building block.
Fig. 3 is a schematic diagram of a simulation computation module.
Fig. 4 is a schematic structural diagram of a detector position confirmation module.
Fig. 5 is a schematic structural diagram of a control module.
FIG. 6 is a schematic view of the installation of the nitrogen explosion suppression system in the vent column housing.
FIG. 7 is a schematic illustration of the installation of a nitrogen explosion suppression system in a housing of a hydrogen generator.
FIG. 8 is a schematic view of the nitrogen explosion suppression system installation in a trench.
1-a construction module, 2-a simulation calculation module, 3-a detector position confirmation module, 4-a hydrogen concentration confirmation module, 5-a control module, 6-a construction sub-module, 7-a construction sub-module, 8-a selection sub-module, 9-a simulation calculation sub-module, 10-a position confirmation sub-module, 11-a parameter traversal sub-module, 12-a superposition analysis unit, 13-a position confirmation unit, 14-a threshold judgment sub-module, 15-an electromagnetic valve control sub-module, 16-a nitrogen release sub-module, 17-an air discharge column shell, 18-a hydrogenation machine shell, 19-a pipe ditch, 20-a pipeline and 21-a nitrogen explosion suppression system.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1 to 8, the invention provides a whole station type nitrogen explosion suppression system, which includes a construction module 1, a simulation calculation module 2, a detector position confirmation module 3, a hydrogen concentration confirmation module 4 and a control module 5, wherein the construction module 1, the simulation calculation module 2, the detector position confirmation module 3, the hydrogen concentration confirmation module 4 and the control module 5 are connected in sequence;
the construction module 1 is used for constructing a scene library on site;
the simulation calculation module 2 is used for performing simulation calculation on the scene library and confirming a hydrogen gathering position and a hydrogen leakage parameter;
the detector position confirming module 3 confirms the installation positions of the hydrogen concentration detector and the flame detector based on the hydrogen gathering position and the hydrogen leakage parameter;
the hydrogen concentration confirmation module 4 is used for acquiring a hydrogen concentration detection value of the hydrogen concentration detector;
and the control module 5 controls the on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position based on the hydrogen concentration detection value and the alarm signal of the flame detector.
Specifically, the explosion suppression system of whole station formula nitrogen gas is based on a sled dress formula modularization hydrogenation station, and the hydrogenation machine removes to install in keeping away from the assigned position of sled body in involving the hydrogen sled, involves all sled doors of hydrogen sled and demolishs and realize both sides ventilation, realizes the hydrogenation machine through the high-pressure hydrogen pipeline in the trench and involves the hydrogen sled and be connected. Therefore, the main hydrogen accumulation points of the system are positioned at the gas discharge column shell 17, the hydrogenation machine shell 18 and the pipe channel 19, and a nitrogen explosion suppression system 21 is considered to be arranged in the system.
The nitrogen explosion suppression system constructs a scene library on site through the construction module 1; the simulation calculation module 2 carries out simulation calculation on the scene library and confirms a hydrogen gathering position and hydrogen leakage parameters; the detector position confirming module 3 confirms the installation positions of the hydrogen concentration detector and the flame detector based on the hydrogen gathering position and the hydrogen leakage parameter; the hydrogen concentration confirmation module 4 acquires a hydrogen concentration detection value of the hydrogen concentration detector at the installation position; the control module 5 controls the on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position based on the hydrogen concentration detection value and the alarm signal of the flame detector, the hydrogen concentration detector and the flame detector are installed at the hydrogen concentration gathering place, the hydrogen concentration and the flame at the installation position are detected in real time through the hydrogen concentration detector and the flame detector, when the hydrogen concentration exceeds the standard or flame exists, the control module 5 controls the on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position, the nitrogen is released pertinently to the hydrogen gathering position under the condition that the hydrogen is ensured not to continuously leak, and the problem that the nitrogen is wasted because an existing nitrogen explosion suppression system does not jet nitrogen in a targeted manner is solved.
Further, the construction module 1 comprises a construction submodule 6 and an establishment submodule 7, and the establishment submodule 7 is connected with the construction submodule 6;
the construction submodule 6 is used for constructing a three-dimensional model according to a construction drawing on site;
and the establishing submodule 7 is used for establishing a hydrogen leakage scene library in the three-dimensional model to obtain a scene library.
The simulation computation module 2 comprises a selection submodule 8, a simulation computation submodule 9, a position confirmation submodule 10 and a parameter traversal submodule 11, wherein the selection submodule 8, the simulation computation submodule 9 and the position confirmation submodule 10 are connected in sequence, and the parameter traversal submodule 11 is connected with the selection submodule 8;
the selection submodule 8 is used for selecting a hydrogen leakage scene from the scene library;
the simulation calculation submodule 9 is configured to perform simulation calculation on the hydrogen leakage scene to obtain a calculated value;
the position confirmation submodule 10 confirms the hydrogen accumulation position in the scene based on the calculated value;
and the parameter traversing submodule 11 is configured to traverse a hydrogen leakage parameter library based on the hydrogen leakage scene to obtain a hydrogen leakage parameter.
The detector position confirmation module 3 comprises a superposition analysis unit 12 and a position confirmation unit 13, wherein the superposition analysis unit 12 is connected with the position confirmation unit 13;
the superposition analysis unit 12 is configured to perform superposition analysis on the hydrogen aggregation position and the hydrogen leakage parameter to obtain an analysis result, and set a threshold of hydrogen concentration;
the position confirmation unit 13 confirms the installation positions of the hydrogen concentration detector and the flame detector based on the analysis result.
The control module 5 comprises a threshold judgment sub-module 14, an electromagnetic valve control sub-module 15 and a nitrogen release sub-module 16, wherein the threshold judgment sub-module 14, the electromagnetic valve control sub-module 15 and the nitrogen release sub-module 16 are sequentially connected;
the threshold judgment submodule 14 is configured to judge the hydrogen concentration detection value based on the threshold, and when the hydrogen concentration detection value is greater than the threshold, trigger the electromagnetic valve control submodule 15 and the nitrogen gas release submodule 16;
the electromagnetic valve control submodule 15 is used for controlling the on-off of the electromagnetic valve on the site;
the nitrogen release sub-module 16 is configured to release nitrogen to the hydrogen accumulation location.
Specifically, the construction submodule 6 completes the construction of the on-site three-dimensional model through an on-site construction drawing. As each 6m high-pressure pipeline 20 is generally adopted on site, the pipelines 20 are a hydrogen pipeline and a vent pipeline, the hydrogen high-pressure pipeline is directly connected through conical threads, and the vent pipeline is directly connected through a clamping sleeve or welded. Therefore, a three-dimensional model of the two pipelines is established in the field three-dimensional model (the actual joint position and the number on the field need to be determined and are embodied in the three-dimensional model).
The high pressure hydrogen line and the vent line are generally seamless stainless steel tubes, so that leakage of hydrogen gas in the line 20 itself is ignored, and only the possibility of leakage of hydrogen gas at the connection part is considered. The building submodule 7 preliminarily considers all hydrogen leakage directions as vertical directions, and completes the construction of a hydrogen leakage scene library in the pipe ditch by combining the punching condition of the cover plate above the pipe ditch, the position of a leakage point, the pressure, the flow and other data of the hydrogen in the pipeline.
After the scene library is constructed, the simulation computation submodule 9 sequentially computes the scene library of hydrogen gas leakage in the pipe trench by using FLUENT software (hydrodynamics simulation software), and preliminarily completes CFD (computational fluid dynamics) gas cloud leakage simulation in the pipe trench to obtain a computed value. The position confirmation submodule 10 confirms the hydrogen accumulation position in the scene based on the calculated value; the parameter traversal submodule 11 traverses a hydrogen leakage parameter library based on the hydrogen leakage scene to obtain hydrogen leakage parameters.
The superposition analysis unit 12 of the detector position confirmation module 3 performs superposition analysis on the hydrogen concentration position and the hydrogen leakage parameter, analyzes the numerical relationship between the hydrogen concentration at the installation position of the hydrogen concentration detector and the highest hydrogen concentration position to obtain an analysis result, and accordingly completes the setting of alarm boundary conditions of the hydrogen concentration detector, namely the threshold value of the hydrogen concentration, and the position confirmation unit 13 confirms the position (1-2 points) where hydrogen is most likely to be accumulated in a scene based on the analysis result to obtain the installation positions of the hydrogen concentration detector and the flame detector; if the hydrogen concentration detector is placed at a position where hydrogen is most likely to accumulate, the alarm boundary condition (the threshold) is set to 10% LEL, which means the lower explosion limit, and if the hydrogen concentration detector is not placed at a position where hydrogen is most likely to accumulate, the numerical relationship between the two is roughly found by a fluid mechanics formula based on model data analysis, and the boundary condition is completed accordingly.
After the arrangement of each hydrogen concentration detector and the setting of alarm boundary conditions are finished, nitrogen explosion suppression rings are respectively arranged in the hydrogenation machine shell 18, the gas discharging column shell 17 and the hydrogen pipe ditch, and the gas source of the nitrogen explosion suppression rings is from a non-hydrogen-related prying assembly grid. The hydrogenation machine shell 18, the gas discharging column shell 17 and the nitrogen explosion suppression ring are all arranged on the top inside the equipment, and the density of the nozzle can be correspondingly adjusted according to the equipment and the point of easy leakage of hydrogen. The nitrogen explosion suppression ring in the pipe trench is arranged in parallel with the high-pressure hydrogen pipeline and the emptying pipeline in the form of a pipeline 20, and nitrogen nozzles are respectively installed at the joints of the two pipelines 20.
The control logic of the whole station type nitrogen explosion suppression system is as follows:
1) The nitrogen explosion suppression control system firstly receives signals of a field hydrogen concentration detector and a flame detector, and triggers a corresponding action solenoid valve to act according to a set threshold value.
2) When the hydrogen concentration detector at the top of the hydrogenation machine shell 18 triggers a hydrogen high alarm, the hydrogen concentration detector at the top of the gas discharging column shell 17 and the hydrogen concentration detector in the pipe ditch trigger a hydrogen high alarm, and the control system displays alarm information on an industrial personal computer interface and a hydrogenation machine interface.
3) When the hydrogen concentration detector at the top of the hydrogenation machine shell 18 triggers a hydrogen high alarm or the hydrogen concentration detector in the explosion-proof box of the hydrogenation machine shell 18 triggers a hydrogen high alarm, the whole hydrogenation machine is shut down and sends a shutdown signal to the station control system, the hydrogenation machine control system opens the electromagnetic valve of the nitrogen explosion suppression system at the hydrogenation machine and releases nitrogen into the hydrogenation machine, and the electromagnetic valve is closed after 30 s.
4) When the hydrogen concentration detector at the top of the gas discharging column shell 17 triggers a hydrogen high alarm, the station control system sends a shutdown instruction to the hydrogenation machine control system, the nitrogen explosion suppression system electromagnetic valve at the gas discharging column shell 17 is opened, nitrogen is released into the gas discharging column shell 17, and the electromagnetic valve is closed after 30 seconds.
5) When the hydrogen concentration detector in the pipe ditch triggers a hydrogen high alarm, the station control system sends a shutdown instruction to the hydrogenation machine control system, the electromagnetic valve of the nitrogen explosion suppression system in the pipe ditch is opened, nitrogen is released into the pipe ditch, and the electromagnetic valve is closed after 30 seconds.
6) When the work of the items 3) -5) is triggered, the whole station equipment of the hydrogen station is shut down, the electromagnetic valve of the nitrogen explosion suppression system is closed after 30s, and the whole system can be restarted after manual reset. If the hydrogen concentration detector is triggered again to alarm after the electromagnetic valve of the nitrogen explosion suppression system is closed and the hydrogen concentration in the equipment rises, the system can still continuously and automatically repeat the steps to release nitrogen into the equipment.
7) When flame detectors in the areas of the hydrogenation machine shell 18, the gas discharging column shell 17 and the pipe ditch send flame alarm signals, the whole station equipment is shut down, electromagnetic valves of the nitrogen explosion suppression systems in the corresponding areas are opened, and nitrogen is released to the corresponding areas. And when the alarm signal disappears, closing the electromagnetic valve of the nitrogen explosion suppression system. After manual reset is needed, the whole set of system can be restarted.
8) The whole set of control system can simultaneously make corresponding reactions aiming at a plurality of signals. The whole system is ensured to be in a safe state.
While the above disclosure describes a preferred embodiment of the present invention, it is understood that the scope of the present invention is not limited thereto, and that all or a portion of the process flow for implementing the above embodiment may be understood by those skilled in the art and equivalents thereof may be made within the scope of the present invention as claimed.
Claims (5)
1. A whole station type nitrogen explosion suppression system is characterized in that,
the device comprises a construction module, a simulation calculation module, a detector position confirmation module, a hydrogen concentration confirmation module and a control module, wherein the construction module, the simulation calculation module, the detector position confirmation module, the hydrogen concentration confirmation module and the control module are sequentially connected;
the construction module is used for constructing a scene library on site;
the simulation calculation module is used for performing simulation calculation on the scene library and confirming a hydrogen gathering position and a hydrogen leakage parameter;
the detector position confirming module confirms the installation positions of the hydrogen concentration detector and the flame detector based on the hydrogen gathering position and the hydrogen leakage parameter;
the hydrogen concentration confirming module is used for acquiring a hydrogen concentration detection value of the hydrogen concentration detector;
and the control module controls the on-off of the electromagnetic valve on the site and releases nitrogen to the hydrogen gathering position based on the hydrogen concentration detection value and the alarm signal of the flame detector.
2. The full station nitrogen suppression system of claim 1,
the building module comprises a building submodule and an establishing submodule, and the establishing submodule is connected with the building submodule;
the construction submodule is used for constructing a three-dimensional model according to a construction drawing on site;
and the establishing submodule is used for establishing a hydrogen leakage scene library in the three-dimensional model to obtain a scene library.
3. The full station nitrogen suppression system as claimed in claim 1,
the simulation calculation module comprises a selection submodule, a simulation calculation submodule, a position confirmation submodule and a parameter traversal submodule, wherein the selection submodule, the simulation calculation submodule and the position confirmation submodule are connected in sequence, and the parameter traversal submodule is connected with the selection submodule;
the selection submodule is used for selecting a hydrogen leakage scene from the scene library;
the analog computation submodule is used for performing analog computation on the hydrogen leakage scene to obtain a computed value;
the position confirmation submodule confirms the hydrogen accumulation position in the scene based on the calculated value;
and the parameter traversing submodule is used for traversing a hydrogen leakage parameter library based on the hydrogen leakage scene to obtain the hydrogen leakage parameters.
4. The full station nitrogen suppression system of claim 1,
the detector position confirmation module comprises a superposition analysis unit and a position confirmation unit, and the superposition analysis unit is connected with the position confirmation unit;
the superposition analysis unit is used for carrying out superposition analysis on the hydrogen gathering position and the hydrogen leakage parameters to obtain an analysis result and setting a threshold value of hydrogen concentration;
the position confirmation unit confirms the installation positions of the hydrogen concentration detector and the flame detector based on the analysis result.
5. The full station nitrogen suppression system according to claim 4,
the control module comprises a threshold judgment sub-module, an electromagnetic valve control sub-module and a nitrogen release sub-module, and the threshold judgment sub-module, the electromagnetic valve control sub-module and the nitrogen release sub-module are sequentially connected;
the threshold value judging submodule judges the hydrogen concentration detection value based on the threshold value, and triggers the electromagnetic valve control submodule and the nitrogen gas release submodule when the hydrogen concentration detection value is larger than the threshold value;
the electromagnetic valve control submodule is used for controlling the on-off of the electromagnetic valve on the site;
the nitrogen release submodule is used for releasing nitrogen to the hydrogen gathering position.
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| CN202211181376.8A CN115607875A (en) | 2022-09-27 | 2022-09-27 | Whole station type nitrogen explosion suppression system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111928116A (en) * | 2020-08-07 | 2020-11-13 | 北京航天雷特机电工程有限公司 | Modularization hydrogenation station and nitrogen explosion suppression system thereof |
| CN114595648A (en) * | 2022-05-11 | 2022-06-07 | 浙江浙能航天氢能技术有限公司 | Design method and system for inert gas explosion suppression scheme of hydrogenation station |
| CN114757015A (en) * | 2022-03-22 | 2022-07-15 | 华南理工大学 | Safe distance determination method based on high-pressure hydrogen pipeline leakage accident |
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- 2022-09-27 CN CN202211181376.8A patent/CN115607875A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928116A (en) * | 2020-08-07 | 2020-11-13 | 北京航天雷特机电工程有限公司 | Modularization hydrogenation station and nitrogen explosion suppression system thereof |
| CN114757015A (en) * | 2022-03-22 | 2022-07-15 | 华南理工大学 | Safe distance determination method based on high-pressure hydrogen pipeline leakage accident |
| CN114595648A (en) * | 2022-05-11 | 2022-06-07 | 浙江浙能航天氢能技术有限公司 | Design method and system for inert gas explosion suppression scheme of hydrogenation station |
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