CN111624303A - Harmful gas leakage detection method and system and computer storage medium - Google Patents
Harmful gas leakage detection method and system and computer storage medium Download PDFInfo
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
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Abstract
The application relates to a harmful gas leakage detection method, a system and a computer storage medium, comprising the following steps: the first judgment module is used for judging the type of harmful gas leakage; the continuous leakage module is used for determining a harmful area where harmful gas leaks at the current moment according to the continuous leakage model; the second judging module is used for executing the instantaneous leakage module if the leakage is finished, or executing the third judging module if the leakage is finished; the third judgment module is used for judging whether the leakage reaches a stable state, acquiring a harmful area of harmful gas leakage at the last moment if the leakage reaches the stable state, and executing the second judgment module; otherwise, updating the current time value and executing the continuous leakage module; the instantaneous leakage module is used for determining a harmful area of harmful gas leakage at the current moment according to the instantaneous leakage model; the fourth judgment module is used for judging whether the harmful gas is dissipated or not, if not, updating the current time value and executing the instantaneous leakage module; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
Description
Technical Field
The application belongs to the technical field of harmful gas leakage detection, and particularly relates to a harmful gas leakage detection method, a harmful gas leakage detection system and a computer storage medium.
Background
With the rapid development of the economy of China, chemical industry enterprises are continuously increased, particularly chemical industry parks are rapidly developed in developed areas of the economy of China in recent years, so that the quantity of inflammable, explosive, toxic, harmful and corrosive materials owned by production areas and storage areas of the enterprises is remarkably increased, major hazard sources are rapidly increased, and a plurality of urban areas lack reasonable planning layout, so that the phenomenon that the major hazard sources are too concentrated exists in a plurality of areas. Meanwhile, with the development and construction of urban areas, residential areas or building public facilities and the like are gradually formed around some chemical enterprises originally located in remote areas. Once a major hazard source is out of control, not only can serious accidents such as fire, explosion and poisoning happen, but also chain accidents can be induced to cause disastrous consequences, so that major losses are caused to lives and properties of people, and the harmony and stability of the society are seriously influenced.
Before an accident occurs, preparation works such as a sufficient emergency rescue plan and the like are not made, a good scientific emergency aid decision and rescue system is not provided when the accident occurs, information analysis of accident causes cannot be effectively managed, and scientific decisions cannot be made timely and accurately to guide safety management.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method and the system for detecting the harmful gas leakage and the computer storage medium are provided to solve the problems that in the prior art, serious accidents such as fire, explosion and poisoning are caused by the harmful gas leakage, chain accidents are possibly induced, disastrous results are caused, serious losses are caused to lives and properties of people, and harmony and stability of the society are seriously influenced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a harmful gas leakage detection method in a first aspect, which comprises the following steps:
s1, judging whether the harmful gas leakage type is instantaneous leakage or continuous leakage;
s2, for continuous leakage, according to the continuous leakage mechanism model and the harmful area of harmful gas leakage at the current moment, predicting the harmful area of harmful gas leakage at the next moment;
s3, if the leakage is over, executing S5, otherwise, executing S4;
s4, judging whether the leakage reaches a steady state, if so, acquiring a harmful area of harmful gas leakage at the last moment, and executing S3; otherwise, updating the value of the next moment and executing S2;
s5, for the instantaneous leakage, predicting the harmful area of the harmful gas leakage at the next moment according to the instantaneous leakage mechanism model;
s6, judging whether the harmful gas is dispersed, if not, updating the value of the next moment, and executing S5; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
A second aspect of the present invention provides a harmful gas leak detection system including:
the first judgment module is used for judging whether the harmful gas leakage type is instantaneous leakage or continuous leakage;
the continuous leakage module is used for predicting the harmful area of the harmful gas leakage at the next moment according to the continuous leakage model and the harmful area of the harmful gas leakage at the current moment;
the second judging module is used for executing the instantaneous leakage module if the leakage is finished, or executing the third judging module if the leakage is finished;
the third judgment module is used for judging whether the leakage reaches a stable state, acquiring a harmful area of harmful gas leakage at the last moment if the leakage reaches the stable state, and executing the second judgment module; otherwise, updating the value of the next moment and executing the continuous leakage module;
the instantaneous leakage module is used for predicting a harmful area of harmful gas leakage at the next moment according to the instantaneous leakage model;
the fourth judgment module is used for judging whether the harmful gas is dissipated or not, if not, updating the value at the next moment, and executing the instantaneous leakage module; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
A third aspect of the invention provides a computer storage medium storing a computer program, characterized in that the computer program, when executed by a processor, is adapted to carry out the method of the first aspect of the invention.
The invention has the beneficial effects that: the invention realizes the prediction of harmful gas leakage hazard areas, dynamically displays the prediction result, and prepares for sufficient emergency rescue plans and the like before an accident occurs, thereby preparing scientific emergency aid decision and rescue systems when the accident occurs, accurately making scientific decision to guide safety management in time, avoiding disastrous consequences and avoiding the loss of lives and properties of people.
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The technical solution of the present application is further explained below with reference to the drawings and the embodiments.
Fig. 1 is a flowchart of a detection method according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example 1
The present embodiment provides a method for detecting a harmful gas leak, as shown in fig. 1, including:
s1, judging whether the harmful gas leakage type is instantaneous leakage or continuous leakage;
s2, for continuous leakage, according to the continuous leakage mechanism model and the harmful area of harmful gas leakage at the current moment, predicting the harmful area of harmful gas leakage at the next moment;
s3, if the leakage is over, executing S5, otherwise, executing S4;
s4, judging whether the leakage reaches a steady state, if so, acquiring a harmful area of harmful gas leakage at the last moment, and executing S3; otherwise, updating the value of the next moment and executing S2;
s5, for the instantaneous leakage, predicting the harmful area of the harmful gas leakage at the next moment according to the instantaneous leakage mechanism model;
s6, judging whether the harmful gas is dispersed, if not, updating the value of the next moment, and executing S5; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
The leakage of the harmful gas is divided into instantaneous leakage and continuous leakage, and the gas leakage formed by instantaneous explosion of equipment or a container for storing the harmful gas is called instantaneous leakage; gas leakage caused by breakage of a container or pipe storing harmful gas, damage of a valve, or the like is called continuous leakage.
When instantaneous leakage occurs, harmful gas diffusion is immediately triggered, and the leakage is finished instantly, and the leakage source has no continuous harmful gas leakage. Continuous leakage is a continuous leakage accident of large-capacity harmful gas, and after leakage for a certain time, the leakage reaches a stable state, namely the toxic concentration in a hazard area does not change any more.
Optionally, the transient leakage model adopts a gaussian plume model, that is:
wherein C (x, y, z, t) represents the mole percent concentration of the leaked harmful gas in the atmosphere; q is leakage amount; u represents the ambient average wind speed; t is the leakage time; h is the effective height of a leakage source; x, y and z are coordinates of the predicted points;x、y、zdiffusion coefficients in the x, y, and z directions, respectively.
Optionally, the continuous leakage model adopts a continuous instantaneous leakage model, that is:
for the continuous leakage characteristic, for the model design of the continuous leakage accident, it must be considered that: simplifying the calculation and saving the loss (after steady state, no calculation is performed). Thus, the present embodiment uses a continuous instantaneous leak model to characterize a continuous leak model.
The manner of determining whether the leak type is continuous leak or instantaneous leak in the present embodiment is:
when ute<2xWhen a transient leak occurs, t is determinedeIndicating the time of the whole leakage of the harmful gas.
When ute>5xAnd (4) judging that the instantaneous leakage occurs.
Optionally, the harmful concentrations of the leaked harmful gas are divided into different concentration levels, and according to the determined harmful gas leakage harmful area, the coverage ranges of different harmful concentrations are dynamically displayed in real time in the harmful area.
According to the Gaussian smoke mass model, under the condition that the leakage parameters and the harmful gas concentration are specified, the harmful gas coverage surface with the concentration larger than or equal to the specified leakage parameters can be calculated. Under the condition of a certain harmful gas concentration, the time t is changed, and the harmful gas coverage of the specified concentration at different moments can be calculated.
The harmful concentration of the harmful gas in the embodiment is divided into 5 grades, namely the national sanitary standard concentration (less than 30 mg/m)3) The mild stimulation concentration (30-350 mg/m)3) Moderate stimulation concentration (350-550 mg/m)3) And the severe stimulation concentration (550-1500 mg/m)3) Lethal concentration (1500-3500 mg/m)3) Immediate lethal concentration (greater than 3500 mg/m)3))。
Optionally, in the hazard area, the step of dynamically displaying the coverage of different hazard concentrations in real time includes:
obtaining equal concentration points, and connecting the equal concentration points to generate a harmful gas covering surface;
the covering surface elements are generated from the harmful gas covering surface and stored in a corresponding geographic database.
Example 2:
the embodiment provides a harmful gas leakage detection system, including:
the first judgment module is used for judging whether the harmful gas leakage type is instantaneous leakage or continuous leakage;
the continuous leakage module is used for predicting a harmful area of harmful gas leakage at the next moment according to the continuous leakage model;
the second judging module is used for executing the instantaneous leakage module if the leakage is finished, or executing the third judging module if the leakage is finished;
the third judgment module is used for judging whether the leakage reaches a stable state, acquiring a harmful area of harmful gas leakage at the last moment if the leakage reaches the stable state, and executing the second judgment module; otherwise, updating the value of the next moment and executing the continuous leakage module;
the instantaneous leakage module is used for predicting a harmful area of harmful gas leakage at the next moment according to the instantaneous leakage model;
the fourth judgment module is used for judging whether the harmful gas is dissipated or not, if not, updating the value at the next moment, and executing the instantaneous leakage module; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
In this embodiment, the transient leakage model adopts a gaussian plume model, that is:
wherein C (x, y, z, y) represents the mole percent concentration of the leaking harmful gas in the atmosphere; q is leakage amount; u represents the ambient average wind speed; t is the leakage time; h is the effective height of a leakage source; x, y and z are coordinates of the predicted points;x、y、zdiffusion coefficients in the x, y, and z directions, respectively.
The continuous leakage model in this embodiment adopts a continuous instantaneous leakage model, that is:
for the continuous leakage characteristic, for the model design of the continuous leakage accident, it must be considered that: simplifying the calculation and saving the loss (after steady state, no calculation is performed). Thus, the present embodiment uses a continuous instantaneous leak model to characterize a continuous leak model.
The manner of determining whether the leak type is continuous leak or instantaneous leak in the present embodiment is:
when ute<2xWhen a transient leak occurs, t is determinedeIndicating the time of the whole leakage of the harmful gas.
When ute>5xAnd (4) judging that the instantaneous leakage occurs.
Optionally, the embodiment further includes a dynamic display module, configured to:
and dividing the harmful concentration of the leaked harmful gas into different concentration grades, and dynamically displaying the coverage range of different harmful concentrations in real time in the harmful region according to the determined harmful gas leakage harmful region.
Further, the dynamic display module of this embodiment is further configured to:
obtaining equal concentration points, and connecting the equal concentration points to generate a harmful gas covering surface;
the covering surface elements are generated from the harmful gas covering surface and stored in a corresponding geographic database.
Please refer to embodiment 1 for a specific implementation of the dynamic display module of this embodiment.
Example 3:
the present embodiment relates to a computer storage medium having stored thereon a computer program for implementing the method of embodiment 1 of the present invention.
In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (10)
1. A harmful gas leak detection method, characterized by comprising:
s1, judging whether the harmful gas leakage type is instantaneous leakage or continuous leakage;
s2, for continuous leakage, according to the continuous leakage mechanism model and the harmful area of harmful gas leakage at the current moment, predicting the harmful area of harmful gas leakage at the next moment;
s3, if the leakage is over, executing S5, otherwise, executing S4;
s4, judging whether the leakage reaches a steady state, if so, acquiring a harmful area of harmful gas leakage at the last moment, and executing S3; otherwise, updating the value of the next moment and executing S2;
s5, for instantaneous leakage, according to the instantaneous leakage mechanism model and the harmful area of harmful gas leakage at the current moment, predicting the harmful area of harmful gas leakage at the next moment;
s6, judging whether the harmful gas is dispersed, if not, updating the value of the next moment, and executing S5; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
2. The harmful gas leak detection method according to claim 1, wherein the instantaneous leak mechanism model employs a gaussian plume model, the gaussian plume model being:
wherein C (x, y, z, t) represents the mole percent concentration of the leaked harmful gas in the atmosphere; q is leakage amount; u represents the ambient average wind speed; t is the leakage time; h is the effective height of the leakage source; x, y and z are coordinates of the predicted points;x、y、zdiffusion coefficients in the x, y, and z directions, respectively.
3. The harmful gas leak detection method according to claim 2, wherein the continuous leak mechanism model employs a continuous instantaneous leak model that is:
4. the harmful gas leakage detection method according to claim 1, wherein the harmful gas leakage concentration is divided into different concentration levels, and the coverage of the different harmful gas leakage concentration is dynamically displayed in real time in the harmful area according to the determined harmful gas leakage area.
5. The harmful gas leakage detection method according to claim 4, wherein the step of dynamically displaying the coverage of different harmful concentrations in real time in the harmful area comprises:
obtaining equal concentration points, and connecting the equal concentration points to generate a harmful gas covering surface;
the covering surface elements are generated from the harmful gas covering surface and stored in a corresponding geographic database.
6. A harmful gas leak detection system, comprising:
the first judgment module is used for judging whether the harmful gas leakage type is instantaneous leakage or continuous leakage;
the continuous leakage module is used for predicting the harmful area of the harmful gas leakage at the next moment according to the continuous leakage model and the harmful area of the harmful gas leakage at the current moment;
the second judging module is used for executing the instantaneous leakage module if the leakage is finished, or executing the third judging module if the leakage is finished;
the third judgment module is used for judging whether the leakage reaches a stable state, acquiring a harmful area of harmful gas leakage at the last moment if the leakage reaches the stable state, and executing the second judgment module; otherwise, updating the value of the next moment and executing the continuous leakage module;
the instantaneous leakage module is used for predicting the harmful area of the harmful gas leakage at the next moment according to the instantaneous leakage model and the harmful area of the harmful gas leakage at the current moment;
the fourth judgment module is used for judging whether the harmful gas is dissipated or not, if not, updating the value at the next moment, and executing the instantaneous leakage module; otherwise, the harmful gas is dissipated, and the harmful gas leakage detection is completed.
7. The harmful gas leak detection system according to claim 6, further comprising a dynamic display module for:
and dividing the harmful concentration of the leaked harmful gas into different concentration grades, and dynamically displaying the coverage range of different harmful concentrations in real time in the harmful region according to the determined harmful gas leakage harmful region.
8. The harmful gas leak detection system according to claim 7, wherein the dynamic display module is further configured to:
obtaining equal concentration points, and connecting the equal concentration points to generate a harmful gas covering surface;
the covering surface elements are generated from the harmful gas covering surface and stored in a corresponding geographic database.
9. The harmful gas leak detection system according to claim 7, wherein the instantaneous leak module determines the hazardous area of the harmful gas leak at the present time using a Gaussian plume model, and the continuous leak module determines the hazardous area of the harmful gas leak at the present time using a continuous instantaneous leak model.
10. A computer storage medium having a computer program stored thereon, the computer program, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 5.
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