Safety control method and system for hydrogen-mixed natural gas pipeline leakage in comprehensive pipe gallery

Abstract

The application discloses a kind of safety control method and system of hydrogen-doped natural gas pipeline leakage in comprehensive pipe gallery, by real-time detection hydrogen and methane in comprehensive pipe gallery to obtain gas concentration, and according to the gas of hydrogen-doped natural gas pipeline transportation calculates corresponding explosion concentration threshold and alarm concentration threshold, gas concentration is compared with explosion concentration threshold and alarm concentration threshold, determines leakage level, and different safety control measures are taken for different leakage levels;For the leakage level that can easily cause explosion, nitrogen injection amount is also calculated according to the space volume of gas cabin in comprehensive pipe gallery and gas leakage rate, and nitrogen injection is carried out in the gas cabin in comprehensive pipe gallery according to the nitrogen injection amount.Compared with the prior art, the concentration of leaked hydrogen-doped natural gas in the pipe gallery can be quickly reduced below the explosion limit to ensure the safe operation of the comprehensive pipe gallery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of natural gas pipelines, in particular to a safety control method and system for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery. BACKGROUND

[0002] Hydrogen energy is a recognized clean energy with many application fields and can truly achieve carbon zero emission. Considering hydrogen-doped transportation on the basis of existing natural gas pipeline networks, deep integration of natural gas and hydrogen is beneficial to accelerating deep decarbonization in industries, construction and other fields and promoting energy transformation in China.

[0003] However, factors such as pipeline corrosion, material aging and external damage during transportation may cause hydrogen-doped natural gas leakage when using existing natural gas pipelines or pipeline networks for transportation. Therefore, safety control after hydrogen-doped natural gas pipeline leakage is very important.

[0004] When hydrogen-doped natural gas leaks into a comprehensive pipe gallery, the existing safety control measures can only detect the leakage and alarm, but cannot take corresponding measures according to the gas concentration in the comprehensive pipe gallery to ensure the safe operation of the comprehensive pipe gallery.

[0005] Therefore, the prior art needs to be improved and improved. SUMMARY

[0006] The main purpose of the present application is to provide a safety control method and system for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery, an intelligent terminal and a computer readable storage medium, which aims to solve the problem that the existing installation control method cannot take corresponding measures according to the gas concentration in the comprehensive pipe gallery to ensure the safe operation of the comprehensive pipe gallery.

[0007] In order to achieve the above purpose, the first aspect of the present application provides a safety control method for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery, comprising:

[0008] real-time detection of hydrogen and methane in the comprehensive pipe gallery to obtain a gas concentration;

[0009] calculating an explosion concentration threshold and an alarm concentration threshold according to the gas transported by the hydrogen-doped natural gas pipeline;

[0010] comparing the gas concentration with the explosion concentration threshold and the alarm concentration threshold to determine a leakage level;

[0011] when the leakage level is dangerous leakage, taking a first safety control measure to reduce the gas concentration;

[0012] When the leakage level is serious leakage, nitrogen injection amount is calculated according to the space volume of the gas chamber in the comprehensive pipe gallery and the gas leakage rate, and the second safety control measure is taken, the second safety control measure comprising injecting the nitrogen injection amount of nitrogen into the gas chamber in the comprehensive pipe gallery.

[0013] Optionally, the expression for calculating the explosion concentration threshold according to the gas transported by the hydrogen-doped natural gas pipeline is:

[0014]

[0015] Wherein, X is the explosion concentration threshold; X1, X2, …, Xn are the explosion concentration thresholds of each component gas in the gas transported in the hydrogen-doped natural gas pipeline; V1, V2, …, Vn are the volume percentages of each component gas in the gas transported in the hydrogen-doped natural gas pipeline. n n

[0016] Optionally, the expression for calculating the nitrogen injection amount according to the space volume of the gas chamber in the comprehensive pipe gallery and the gas leakage rate is:

[0017] Q N = K1Q L V + K2,

[0018] Wherein, Q N represents the nitrogen injection amount; Q L represents the gas leakage rate; V represents the space volume of the gas chamber in the comprehensive pipe gallery; K1 and K2 are set coefficients.

[0019] Optionally, the real-time detection of hydrogen and methane in the comprehensive pipe gallery to obtain the gas concentration comprises:

[0020] Collecting the gas leaked from the hydrogen-doped natural gas pipeline in the comprehensive pipe gallery, extracting the features of the collected gas, and obtaining the concentration of hydrogen and the concentration of methane;

[0021] Cumulating the concentration of hydrogen and the concentration of methane to obtain the gas concentration.

[0022] Optionally, the first safety control measure comprises closing the gas supply valve and starting the ventilation system; and the second safety control measure further comprises closing the gas supply valve and closing the ventilation system.

[0023] The second aspect of the present application provides a safety control system for leakage of a hydrogen-doped natural gas pipeline in a comprehensive pipe gallery, wherein the above-mentioned system comprises:

[0024] The system comprises a detection device, a gas emergency shut-off device, a ventilation device, a nitrogen injection device and a control server;

[0025] ​​The detection device is used for detecting hydrogen and methane in the comprehensive pipe gallery in real time, and obtaining a gas concentration;

[0026] The control server is used for calculating an explosion concentration threshold and an alarm concentration threshold according to the gas delivered by the hydrogen-doped natural gas pipeline, comparing the gas concentration with the explosion concentration threshold and the alarm concentration threshold to determine a leakage level, controlling the gas emergency cut-off device to close a gas supply valve and controlling the ventilation device to open ventilation when the leakage level is a dangerous leakage, and calculating a nitrogen injection amount according to a space volume of a gas cabin in the comprehensive pipe gallery and a gas leakage rate when the leakage level is a serious leakage, controlling the gas emergency cut-off device to close the gas supply valve, controlling the ventilation device to close ventilation, and controlling the nitrogen injection device to inject the nitrogen injection amount of nitrogen into the gas cabin in the comprehensive pipe gallery.

[0027] Optionally, the control server further comprises a nitrogen injection amount calculation unit, which is used for calculating the nitrogen injection amount according to the space volume of the gas cabin in the comprehensive pipe gallery and the gas leakage rate.

[0028] Optionally, the control server further comprises an explosion concentration threshold calculation unit, which is used for calculating the explosion concentration threshold according to the gas delivered by the hydrogen-doped natural gas pipeline.

[0029] The third aspect of the present application provides an intelligent terminal, which comprises a memory, a processor, and a comprehensive pipe gallery hydrogen-doped natural gas pipeline leakage safety control program stored in the memory and capable of running on the processor, and when the comprehensive pipe gallery hydrogen-doped natural gas pipeline leakage safety control program is executed by the processor, the steps of any one of the comprehensive pipe gallery hydrogen-doped natural gas pipeline leakage safety control methods are implemented.

[0030] The fourth aspect of the present application provides a computer readable storage medium, which stores a comprehensive pipe gallery hydrogen-doped natural gas pipeline leakage safety control program, and when the comprehensive pipe gallery hydrogen-doped natural gas pipeline leakage safety control program is executed by a processor, the steps of any one of the comprehensive pipe gallery hydrogen-doped natural gas pipeline leakage safety control methods are implemented.

[0031] From the above, the present application obtains the gas concentration by detecting hydrogen and methane in the comprehensive pipe gallery in real time, calculates the corresponding explosion concentration threshold and alarm concentration threshold according to the gas delivered by the hydrogen-mixed natural gas pipeline, compares the gas concentration with the explosion concentration threshold and the alarm concentration threshold, determines the leakage level, and takes different safety control measures for different leakage levels; for the leakage level that is easy to cause explosion, the nitrogen injection amount is calculated according to the space volume of the gas cabin in the comprehensive pipe gallery and the gas leakage rate, and nitrogen is injected into the gas cabin in the comprehensive pipe gallery according to the nitrogen injection amount. Compared with the prior art, the concentration of the leaked hydrogen-mixed natural gas in the pipe gallery can be quickly reduced below the explosion limit, so as to ensure the safe operation of the comprehensive pipe gallery. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 is a safety control method flowchart of the hydrogen-mixed natural gas pipeline leakage in the comprehensive pipe gallery provided by the embodiments of the present application;

[0034] Figure 2 is Figure 1 is a specific flowchart of step S100 of the embodiments;

[0035] Figure 3 is a structural schematic diagram of the safety control system of the hydrogen-mixed natural gas pipeline leakage in the comprehensive pipe gallery provided by the embodiments of the present application;

[0036] Figure 4 is a working flowchart of the safety control system of the embodiments of the present application;

[0037] Figure 5 is an internal structure principle block diagram of an intelligent terminal provided by the embodiments of the present application. DETAILED DESCRIPTION

[0038] In the following description, specific details are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments without these specific details. In other instances, well-known systems, devices, circuits and methods have not been described in detail in order to avoid obscuring the present application.

[0039] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0040] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0041] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0042] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0043] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] When hydrogen-blended natural gas with different hydrogen blending ratios, different pipeline pressures, and different leakage hole sizes leaks into the integrated pipeline corridor, existing safety control measures can only detect the leakage and issue an alarm, but cannot reduce the gas concentration in the integrated pipeline corridor in time to ensure its safe operation.

[0046] In order to improve the safety management efficiency of the comprehensive pipe gallery and reduce the probability of accidents, the application provides a safety control method for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery, adopts a pattern recognition method to obtain the gas concentration of the hydrogen-doped natural gas leaked in the comprehensive pipe gallery, determines the leakage level according to the explosion concentration threshold and the alarm concentration threshold of the hydrogen-doped natural gas, takes different safety control measures according to different leakage levels, and when there is a possibility of explosion, also reduces the gas concentration by injecting nitrogen gas, so as to ensure the safe operation of the gas cabin of the comprehensive pipe gallery.

[0047] Exemplary method

[0048] The embodiment provides a safety control method for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery, which is installed on an electronic device such as an intelligent terminal or a server. As shown in the figure, Figure 1 The embodiment specifically includes the following steps:

[0049] Step S100: Real-time detection of hydrogen and methane in the comprehensive pipe gallery to obtain the gas concentration;

[0050] Specifically, since hydrogen and natural gas are both flammable and explosive gases, after being leaked, they are mixed with air to form flammable gas, which is extremely easy to explode when encountering an open flame, causing serious accident consequences. Therefore, it is necessary to real-time detect the concentration of hydrogen and methane in the comprehensive pipe gallery, accumulate the hydrogen concentration and the methane concentration, and obtain the gas concentration to determine whether leakage occurs in the comprehensive pipe gallery and the degree of leakage according to the gas concentration.

[0051] In some embodiments, a methane sensor and a hydrogen sensor are installed in the comprehensive pipe gallery, and the gas concentration of hydrogen and methane in the comprehensive pipe gallery is constantly monitored in real time through the two sensors to obtain the hydrogen concentration and the methane concentration respectively. Then, the two are added to obtain the gas concentration.

[0052] In the embodiment, as shown in the figure, Figure 2 The embodiment specifically includes the following steps:

[0053] Step S110: Collecting the gas leaked from the hydrogen-doped natural gas pipeline in the comprehensive pipe gallery, extracting the features of the collected gas, and obtaining the concentration of hydrogen and the concentration of methane;

[0054] Step S120: Accumulating the concentration of hydrogen and the concentration of methane to obtain the gas concentration.

[0055] Specifically, the gas leaked from the hydrogen-doped natural gas pipeline in the comprehensive pipe gallery is collected by a gas sensor. The gas sensor reacts with the measured gas and generates an electric signal proportional to the concentration of the gas. The electric signal is converted into a digital signal AD value through a signal conversion program. A digital signal AD value collection program reads the digital signal AD value within 15 seconds after the gas sensor reacts with the gas and inputs it into a digital signal processing program. The digital signal AD value is extracted for hydrogen and methane respectively, and the extracted features are input into a deep learning model to output the concentrations of hydrogen and methane respectively. Then the two are added to obtain the gas concentration.

[0056] The deep learning model of the embodiment can also detect and judge other types of gas, as long as the deep learning model is trained in advance with different concentrations of other types of gas.

[0057] Step S200: According to the gas transported by the hydrogen-doped natural gas pipeline, the explosion concentration threshold and the alarm concentration threshold are calculated;

[0058] Specifically, the explosion concentration threshold and the alarm concentration threshold are used to judge the severity of the leakage. When the explosion concentration threshold is exceeded, it indicates that the gas leakage in the comprehensive pipe gallery is serious and is prone to explosion. When the alarm concentration threshold is exceeded, it indicates that the gas leakage in the comprehensive pipe gallery is dangerous and certain measures need to be taken to control it. The explosion concentration threshold varies according to the composition and proportion of the gas transported by the hydrogen-doped natural gas pipeline. Calculating the explosion concentration threshold of hydrogen-doped natural gas can better determine whether the gas cabin in the comprehensive pipe gallery is safe to operate.

[0059] The expression for calculating the explosion concentration threshold is

[0060]

[0061] Where X is the explosion concentration threshold; X1, X2, …, Xn are the explosion concentration thresholds of the component gases in the gas transported by the hydrogen-doped natural gas pipeline; V1, V2, …, Vn are the volume percentages of the component gases in the gas transported by the hydrogen-doped natural gas pipeline. n n

[0062] According to relevant specifications, 20% of the explosion concentration threshold of hydrogen-doped natural gas is set as the alarm concentration threshold.

[0063] Step S300: Compare the gas concentration with the explosion concentration threshold and the alarm concentration threshold to determine the leakage level;

[0064] ​​Specifically, after determining the explosion concentration threshold and the alarm concentration threshold, the gas concentration in the gas cabin in the comprehensive pipe gallery is compared with the explosion concentration threshold and the alarm concentration threshold in sequence, when the gas concentration is greater than or equal to the explosion concentration threshold, the leakage level is set to serious leakage; when the gas concentration is greater than or equal to the alarm concentration threshold and less than the explosion concentration threshold, the leakage level is set to dangerous leakage; when the gas concentration is less than the alarm concentration threshold, the leakage level is set to no leakage.

[0065] By judging and classifying the leakage in the comprehensive pipe gallery, the monitoring and alarm system can be designed according to the corresponding level, and the safety control system is established to determine the specific working process, so that the whole safety control process in the comprehensive pipe gallery is more scientific, complete and efficient.

[0066] Step S400: when the leakage level is dangerous leakage, the first safety control measure is taken;

[0067] Specifically, when the leakage level is determined to be dangerous leakage, the corresponding safety control measure is taken according to the level. The first safety control measure mainly includes closing the gas supply valve and starting the ventilation system. The running efficiency of the ventilation system is determined according to the space volume of the comprehensive pipe gallery and the gas concentration. In this embodiment, a signal is sent to the gas control system and the ventilation system, the gas supply valve is quickly closed by the gas control system, the ventilation system is started, and ventilation is performed not less than 12 times / h.

[0068] Optionally, when the leakage level is determined to be dangerous leakage, an alarm signal can also be sent to timely inform the monitoring personnel or relevant personnel.

[0069] Step S500: when the leakage level is serious leakage, the nitrogen injection amount is calculated according to the space volume of the gas cabin in the comprehensive pipe gallery and the gas leakage rate, and the second safety control measure is taken, which includes injecting the nitrogen injection amount of nitrogen into the gas cabin in the comprehensive pipe gallery.

[0070] Specifically, when the leakage level is serious leakage, it means that the leakage gas concentration in the gas cabin in the comprehensive pipe gallery has reached an extremely explosive degree, and measures need to be taken immediately to reduce the concentration. Since the nitrogen injection inerting method is adopted, it is easy to mix nitrogen and gas in a short time to form an inert gas group, which effectively inhibits the concentration condition of gas explosion, thereby effectively controlling the accident danger range. Therefore, when the leakage level is serious leakage, the control measure of this level must include the nitrogen injection measure. Since excessive nitrogen concentration may cause poisoning symptoms, the nitrogen injection amount is calculated according to the space volume of the gas cabin in the comprehensive pipe gallery and the gas leakage rate to ensure safety and reliability. The specific calculation formula of the nitrogen injection amount is: Q N =1Q L V+K2, wherein Q NQ represents the amount of nitrogen injection; Q L V represents the space volume of the gas chamber in the comprehensive pipe gallery; K1 and K2 are set coefficients, which can be determined by experiments or numerical simulation.

[0071] In this embodiment, the second safety control measure further includes closing the gas supply valve and closing the ventilation system. If the ventilation is opened while the nitrogen is injected, a large amount of nitrogen is discharged to the outside of the gas chamber, which affects the control effect. Therefore, the ventilation is not opened during the nitrogen injection.

[0072] At the same time of taking the control measures, the concentration of the leaked gas is continuously detected. For the dangerous leakage and the serious leakage level, after a period of time, when the gas concentration is reduced to below the alarm concentration, the cause of the accident needs to be found out in time for repair and maintenance. When the gas concentration is still higher than the alarm concentration, it is necessary to return to step S100 for repeated execution. In some embodiments, the gas concentration and the gas leakage rate are also analyzed. When the gas concentration increases and the gas leakage rate increases, the amount of nitrogen injection and the number of ventilation can be increased to reduce the gas concentration to the safety level as soon as possible.

[0073] In summary, in this embodiment, the hydrogen and methane in the comprehensive pipe gallery are detected in real time to obtain the gas concentration, and the corresponding explosion concentration threshold and alarm concentration threshold are calculated according to the gas delivered by the hydrogen-doped natural gas pipeline. The gas concentration is compared with the explosion concentration threshold and the alarm concentration threshold to determine the leakage level, and different safety control measures are taken for different leakage levels. For the leakage level that is easy to cause explosion, the amount of nitrogen injection is calculated according to the space volume of the gas chamber in the comprehensive pipe gallery and the gas leakage rate, and the nitrogen is injected into the gas chamber in the comprehensive pipe gallery according to the amount of nitrogen injection, so that the concentration of the leaked hydrogen-doped natural gas in the pipe gallery is quickly reduced below the explosion limit, thereby ensuring the safe operation of the comprehensive pipe gallery. The entire safety control process in the comprehensive pipe gallery is more scientific, complete and efficient.

[0074] Exemplary system

[0075] As Figure 3Corresponding to the safety control method for hydrogen-doped natural gas pipeline leakage in the comprehensive pipe gallery, the embodiment of the present application also provides a safety control system for hydrogen-doped natural gas pipeline leakage in the comprehensive pipe gallery, which comprises a detection device 600, a control server 610, a gas emergency shutoff device 620, a ventilation device 630 and a nitrogen injection device 640. The detection device 600 mainly comprises a methane sensor and a hydrogen sensor, which can detect the hydrogen and methane in the comprehensive pipe gallery in real time to obtain the gas concentration and transmit the obtained gas concentration to the control server 610. The gas emergency shutoff device 620 can receive the signal of the control server 610 to close or open the gas supply valve; the ventilation device 630 can receive the signal of the control server 610 to open or close the ventilation between the comprehensive pipe gallery and the outside world; and the nitrogen injection device 640 can receive the signal of the control server 610 to inject nitrogen into the gas cabin in the comprehensive pipe gallery. The gas emergency shutoff device 620, the ventilation device 630 and the nitrogen injection device 640 are existing devices, which will not be described here.

[0076] The safety control method for hydrogen-doped natural gas pipeline leakage in the comprehensive pipe gallery is run on the control server 610, the explosion concentration threshold and the alarm concentration threshold are calculated according to the gas transported by the hydrogen-doped natural gas pipeline; the received gas concentration is compared with the explosion concentration threshold and the alarm concentration threshold to determine the leakage level; when the leakage level is dangerous leakage, a signal is sent to the gas emergency shutoff device 620 to control the gas emergency shutoff device to close the gas supply valve, and a signal is sent to the ventilation device 630 to control the ventilation device 630 to open the ventilation; when the leakage level is serious leakage, the nitrogen injection amount is calculated according to the space volume of the gas cabin in the comprehensive pipe gallery and the gas leakage rate, a signal is sent to the gas emergency shutoff device 620 to control the gas emergency shutoff device 620 to close the gas supply valve, a signal is sent to the ventilation device 630 to control the ventilation device 630 to close the ventilation, and a signal is sent to the nitrogen injection device 640 to control the nitrogen injection device 640 to inject the nitrogen injection amount of nitrogen into the gas cabin in the comprehensive pipe gallery.

[0077] Optionally, a login module can also be run on the control server 610 to ensure that the login personnel can only operate the system within the permission range, thereby ensuring the safety of the system and the personnel; a safety protection module can also be run to obtain the data of the intelligent monitoring device, so that the system operator can monitor the state of the pipe gallery in real time; an alarm module can also be run on the control server 610 to alarm in time after the hydrogen-doped natural gas pipeline leakage accident occurs;

[0078] Further, a nitrogen injection amount calculation module is also run on the control server 610 to calculate the nitrogen injection amount according to the space volume of the gas cabin in the comprehensive pipe gallery and the gas leakage rate.

[0079] Further, the control server 610 also runs an explosion concentration threshold calculation module for calculating the explosion concentration threshold according to the gas delivered by the hydrogen-doped natural gas pipeline.

[0080] In some embodiments, the detection device 600 described above is only responsible for collecting the gas in the gas cabin in the comprehensive pipe gallery, and the control server 610 runs a deep learning model to analyze the collected gas to obtain the gas concentration.

[0081] When the safety control system of the present embodiment is in use, information input is first performed, mainly including personnel information, monitoring information and space information. The personnel information is divided into two categories according to the internal personnel and the external personnel entering the gallery, mainly including personnel basic information and professional information; the monitoring information mainly includes real-time data and historical data of the corresponding auxiliary facilities such as gas concentration sensors, intelligent monitoring devices and electronic patrol devices, including gas concentration, temperature, alarm data, monitoring video data, lighting status, etc. The space information mainly includes data related to geographic information, including road, river, green plants, pipeline distribution, equipment location, etc.

[0082] As shown in Figure 4 When the system is running, the methane and hydrogen sensors continuously monitor and classify the gas concentration in the gallery. When the gas concentration does not reach the alarm concentration, it is a "no leakage" situation, and normal ventilation of no less than 6 times / h is performed at this time; when the gas concentration reaches the alarm concentration but is still lower than the explosion concentration, it is a dangerous leakage, and the control server quickly responds to transmit an alarm signal, and transmits a danger signal to the gas emergency shut-off device, the ventilation device. After receiving the danger signal, the gas emergency shut-off device quickly closes the gas valve, the ventilation device starts, and the accident ventilation of no less than 12 times / h is performed. When the gas concentration is higher than the explosion concentration, it is a serious leakage, and the control server quickly responds to transmit an alarm signal, and transmits a danger signal to the gas emergency shut-off device, the ventilation device and the nitrogen injection device. After receiving the danger signal, the gas emergency shut-off device quickly closes the gas valve, the ventilation device is closed, and the nitrogen injection device opens the nitrogen injection head to inject nitrogen into the cabin.

[0083] The safety control system for hydrogen-doped natural gas pipeline leakage in the comprehensive pipe gallery of the present embodiment can quickly reduce the concentration of leaked hydrogen-doped natural gas in the gallery to below the explosion limit, reduce the probability of accidents, and ensure the safe operation of the comprehensive pipe gallery. The entire safety control process in the comprehensive pipe gallery is more scientific, complete and efficient.

[0084] Specifically, the specific functions of each module of the safety control system for hydrogen-doped natural gas pipeline leakage in the comprehensive pipe gallery described above in the present embodiment can be referred to the corresponding description in the safety control method for hydrogen-doped natural gas pipeline leakage in the comprehensive pipe gallery described above, which will not be repeated here.

[0085] Based on the above-mentioned embodiments, the present application further provides an intelligent terminal, which comprises a processor and a memory. The processor is configured to provide computing and control capabilities. The memory comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery. The internal memory provides an environment for running the operating system and the safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery in the non-volatile storage medium. The safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery is executed by the processor to implement the steps of any one of the safety control methods for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery.

[0086] Based on the above-mentioned embodiments, the present application further provides an intelligent terminal, which can have a principle block diagram as shown in Figure 5 The intelligent terminal comprises a processor, a memory, a network interface and a display screen connected by a system bus. The processor of the intelligent terminal is configured to provide computing and control capabilities. The memory of the intelligent terminal comprises a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery. The internal memory provides an environment for running the operating system and the safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery in the non-volatile storage medium. The network interface of the intelligent terminal is configured to communicate with an external terminal through a network connection. The safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery is executed by the processor to implement the steps of any one of the safety control methods for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery. The display screen of the intelligent terminal can be a liquid crystal display screen or an electronic ink display screen.

[0087] Those skilled in the art can understand that, Figure 5 The principle block diagram shown in the above-mentioned embodiments is only a block diagram of part of the structure related to the present application, and does not constitute a limitation on the intelligent terminal to which the present application is applied. Specifically, the intelligent terminal can comprise more or fewer components than those shown in the diagram, or combine certain components, or have a different component arrangement.

[0088] The present application further provides a computer readable storage medium, which stores a safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery. The safety control program for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery is executed by a processor to implement the steps of any one of the safety control methods for hydrogen-doped natural gas pipeline leakage in a comprehensive pipe gallery provided by the present application.

[0089] It should be understood that the sequence of the steps in the above-described embodiments does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0090] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the above-mentioned device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software function unit. In addition, the specific name of each functional unit and module is only for easy distinction, and does not limit the protection scope of the present application. The specific working process of the unit and module in the above-mentioned system can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

[0091] In the above-described embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0092] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different ways to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0093] In the embodiments provided by the present application, it should be understood that the disclosed device / terminal equipment and method can be implemented in other ways. For example, the above-described device / terminal equipment embodiments are only schematic, for example, the division of the above-mentioned modules or units is only a logical function division, and actual implementation can be in another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0094] The above integrated modules / units, if realized in the form of software function units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the above-mentioned computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be realized. The above-mentioned computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The above-mentioned computer readable medium can include any entity or device capable of carrying the above-mentioned computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the above-mentioned computer readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction.

[0095] The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not deviate from the spirit and scope of the corresponding technical solutions, and should be included in the protection scope of the present application.

Claims

1. A safety control method for leakage of hydrogen-blended natural gas pipelines in a comprehensive pipeline corridor, characterized in that: include: Real-time detection of hydrogen and methane in the integrated pipeline corridor to obtain gas concentrations; Calculate explosion concentration thresholds and alarm concentration thresholds based on the gas transported by hydrogen-blended natural gas pipelines; Comparing the gas concentration with the explosion concentration threshold and the alarm concentration threshold to determine the leakage level; When the leakage level is a dangerous leakage, taking a first safety control measure to reduce the gas concentration; When the leakage level is a serious leakage, the nitrogen injection amount is calculated according to the spatial volume of the gas compartment in the integrated pipe gallery and the gas leakage rate, and a second safety control measure is taken, wherein the second safety control measure includes injecting nitrogen of the nitrogen injection amount into the gas compartment in the integrated pipe gallery; The expression for calculating the explosion concentration threshold value based on the gas transported by the hydrogen-blended natural gas pipeline is: Where X is the explosion concentration threshold; X1, X2,…, X n is the explosion concentration threshold of each component gas in the gas transported in the hydrogen-blended natural gas pipeline; V1, V2,…, V n It is the volume percentage of each component gas in the gas transported in the hydrogen-blended natural gas pipeline; The expression for calculating the amount of nitrogen injection based on the spatial volume of the gas compartment in the integrated pipe gallery and the gas leakage rate is: Q N JK1Q L V+K2, Among them, Q N Indicates the amount of nitrogen injected; Q L Indicates the gas leakage rate; V indicates the spatial volume of the gas compartment in the integrated pipe gallery; K1 and K2 are setting coefficients; The first safety control measure includes closing the air supply valve and starting the ventilation system.

2. The safety control method for leakage of hydrogen-blended natural gas pipeline in the integrated pipeline corridor according to claim 1, characterized in that: The real-time detection of hydrogen and methane in the integrated pipeline corridor to obtain gas concentrations includes: Collect gas leaked from hydrogen-blended natural gas pipelines within the integrated pipeline corridor, extract features from the collected gas, and distribute the hydrogen and methane concentrations; The concentration of the hydrogen gas and the concentration of the methane gas are integrated to obtain the gas concentration.

3. The safety control method for leakage of hydrogen-blended natural gas pipeline in the integrated pipeline corridor according to claim 1, characterized in that: The second safety control measure also includes closing the air supply valve and shutting down the ventilation system.

4. The safety control system for leakage of hydrogen-blended natural gas pipeline in the integrated pipeline corridor is characterized by: The system includes a detection device, a gas emergency shut-off device, a ventilation device, a nitrogen injection device and a control server; The detection device is used to detect hydrogen and methane in the integrated pipeline corridor in real time to obtain gas concentrations; The control server is used to calculate an explosion concentration threshold and an alarm concentration threshold based on the gas transported by the hydrogen-blended natural gas pipeline; compare the gas concentration with the explosion concentration threshold and the alarm concentration threshold to determine the leakage level; when the leakage level is a dangerous leakage, control the gas emergency shut-off device to close the gas supply valve and control the ventilation device to open ventilation; when the leakage level is a serious leakage, calculate the nitrogen injection amount based on the spatial volume and gas leakage rate of the gas compartment in the integrated pipe gallery, control the gas emergency shut-off device to close the gas supply valve, control the ventilation device to close ventilation, and control the nitrogen injection device to inject the nitrogen injection amount into the gas compartment in the integrated pipe gallery; The control server also includes a nitrogen injection amount calculation module, which is used to calculate the nitrogen injection amount according to the spatial volume and gas leakage rate of the gas compartment in the integrated pipeline corridor; The control server further includes an explosion concentration threshold calculation module, which is used to calculate the explosion concentration threshold based on the gas transported by the hydrogen-blended natural gas pipeline; The expression for calculating the explosion concentration threshold of gas transported by hydrogen-blended natural gas pipeline is: Where X is the explosion concentration threshold; X1, X2,…, X n is the explosion concentration threshold of each component gas in the gas transported in the hydrogen-blended natural gas pipeline; V1, V2,…, V n It is the volume percentage of each component gas in the gas transported in the hydrogen-blended natural gas pipeline; The expression for calculating the nitrogen injection amount based on the spatial volume of the gas compartment in the integrated pipe gallery and the gas leakage rate is: Q N JK1Q L V+K2, Among them, Q N Indicates the amount of nitrogen injected; Q L Indicates the gas leakage rate; V represents the spatial volume of the gas compartment in the integrated pipeline corridor; K1 and K2 are set coefficients.

5. Intelligent terminal, characterized in that: The invention comprises a memory, a processor, and a safety control program for leakage of a hydrogen-blended natural gas pipeline in an integrated pipeline gallery, which is stored in the memory and can be run on the processor. When the safety control program for leakage of a hydrogen-blended natural gas pipeline in an integrated pipeline gallery is executed by the processor, the steps of the safety control method for leakage of a hydrogen-blended natural gas pipeline in an integrated pipeline gallery as claimed in any one of claims 1 to 3 are implemented.

6. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a safety control program for leakage of a hydrogen-blended natural gas pipeline in an integrated pipeline corridor. When the safety control program for leakage of a hydrogen-blended natural gas pipeline in an integrated pipeline corridor is executed by a processor, the steps of the safety control method for leakage of a hydrogen-blended natural gas pipeline in an integrated pipeline corridor as described in any one of claims 1-3 are implemented.

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