Method and device for evaluating the effectiveness of protection against toxic chemicals in emergency spaces

Abstract

The application relates to a method and device for evaluating the protection effectiveness of a toxic chemical in an emergency space. The method comprises the following steps: acquiring the distance between each chemical storage device and the emergency space in a chemical storage site, and determining the air exchange rate of the emergency space and the outside world; determining a target storage device from each chemical storage device based on the chemical parameters of the chemical stored in each chemical storage device, the distance and the air exchange rate; determining the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and reach the concentration threshold in the emergency space; and evaluating the protection effectiveness of the emergency space based on the first diffusion time and the monitoring time required for monitoring the diffused target chemical in the protected emergency space. The method can accurately and quickly evaluate whether the protection of the emergency space is effective.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of emergency space protection effect evaluation, in particular to a method and device for evaluating the protection effectiveness of toxic chemicals in an emergency space. BACKGROUND

[0002] In order to deal with the leakage of toxic chemicals in a large station, an emergency space with habitability is generally provided in the large station, such as a main control room in a nuclear power station. However, the leakage of toxic chemicals may affect the habitability of the emergency space, and therefore, it is necessary to regularly evaluate whether the protection of the emergency space against toxic chemicals is effective.

[0003] In the traditional technology, the protection effectiveness of the emergency space against toxic chemicals is evaluated by simulating the leakage of toxic chemicals based on a complex model and a large number of parameters. However, many parameters in the large number of parameters relied on by the complex model are difficult to accurately obtain, such as design parameters of the ventilation system of the emergency space and environmental parameters, resulting in that a large number of estimated values are used for analysis in the analysis process of the complex model. In addition, the analysis process of the complex model also relies on the powerful computing power of the computer, and the computer needs to perform complex and time-consuming data processing on a large number of parameters. Therefore, the evaluation method based on the complex model and the large number of parameters in the traditional technology cannot accurately and quickly evaluate whether the protection of the emergency space is effective. SUMMARY

[0004] Therefore, it is necessary to provide a method and device for evaluating the protection effectiveness of toxic chemicals in an emergency space, which can accurately and quickly evaluate whether the protection of the emergency space is effective.

[0005] In a first aspect, the present application provides a method for evaluating the protection effectiveness of toxic chemicals in an emergency space. The method comprises:

[0006] obtaining distances between the emergency space and each chemical storage device in a chemical storage site, and determining an air exchange rate of the emergency space and the outside world;

[0007] determining a target storage device from each chemical storage device based on chemical parameters of the chemical stored in each chemical storage device, the distances and the air exchange rate, the target storage device being a chemical storage device that will affect the habitability of the emergency space when chemical diffusion occurs without protection treatment of the emergency space;

[0008] determining a first diffusion time required for a target chemical in the target storage device to diffuse to the emergency space with protection and for the concentration of the target chemical in the emergency space to reach a concentration threshold;

[0009] Based on the first diffusion time and a monitoring time required for monitoring the target chemical diffused in the protected emergency space, the protection effectiveness of the emergency space is evaluated.

[0010] In one of the embodiments, determining the target storage device from the chemical storage devices based on the chemical parameters of the chemical stored in each of the chemical storage devices, the distances, and the air change rate includes:

[0011] Determining the weight threshold of the chemical stored in each of the chemical storage devices based on the chemical parameters of the chemical stored in each of the chemical storage devices, the distances, and the air change rate.

[0012] When the actual weight of the chemical stored in the chemical storage device exceeds the weight threshold corresponding to the chemical storage device, the chemical storage device is determined as the target storage device.

[0013] In one of the embodiments, determining the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold includes:

[0014] Determining the first concentration of the target chemical in the target storage device at an air intake of the protected emergency space when the target chemical diffuses to the air intake.

[0015] When the first concentration exceeds the concentration threshold, determining the second concentration of the target chemical in the target storage device at a personnel occupancy area of the protected emergency space through the air intake of the emergency space when the target chemical diffuses to the protected emergency space.

[0016] Determining the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold includes:

[0017] When the second concentration exceeds the concentration threshold, determining the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold.

[0018] In one of the embodiments, determining the first concentration of the target chemical in the target storage device at an air intake of the protected emergency space before the target chemical diffuses to the air intake includes:

[0019] Determining the release rate of the target chemical based on the release environment of the target chemical in the target storage device.

[0020] Determining the atmospheric dispersion factor of the target chemical based on environmental data of an environment in which the chemical storage site is located.

[0021] determining a first concentration of the target chemical at the air intake when the target chemical in the target storage device diffuses to the air intake of the protected emergency space, comprising:

[0022] determining the first concentration of the target chemical at the air intake based on the release rate and an atmospheric dispersion factor.

[0023] In one embodiment, when the first concentration exceeds the concentration threshold, determining a second concentration of the target chemical in the personnel occupancy area of the protected emergency space through the air intake of the emergency space from the target storage device, comprising:

[0024] when the first concentration exceeds the concentration threshold, the duration of the diffusion of the target chemical is a second diffusion time;

[0025] determining the second concentration of the target chemical in the personnel occupancy area of the protected emergency space through the air intake of the emergency space from the target storage device based on the second diffusion time, the fresh air volume of the air intake, the volume of the personnel occupancy area, and the first concentration.

[0026] In one embodiment, evaluating the effectiveness of the protection of the emergency space based on the first diffusion time and a monitoring time required for monitoring the diffused target chemical in the protected emergency space, comprising:

[0027] when the monitoring time is less than the first diffusion time, determining that the protection of the emergency space is effective;

[0028] after determining that the protection of the emergency space is effective when the monitoring time is less than the first diffusion time, the method further comprises:

[0029] obtaining an olfactory threshold concentration of the target chemical;

[0030] determining a third diffusion time required for the concentration of the target chemical in the emergency space to reach the olfactory threshold concentration;

[0031] when the third diffusion time is less than the first diffusion time, determining that the protection of the emergency space is effective.

[0032] In a second aspect, the present application also provides an emergency space toxic chemical protection effectiveness evaluation device. The device comprises:

[0033] a data acquisition module for acquiring the distance between the emergency space and each chemical storage device in the chemical storage site, and determining the air exchange rate between the emergency space and the outside world;

[0034] determine a target storage device from the chemical storage devices based on the chemical parameters of the chemical stored in each of the chemical storage devices, the distances, and the ventilation rate, the target storage device being a chemical storage device that, in the absence of protective treatment of the emergency space, would affect habitability of the emergency space in the event of chemical diffusion;

[0035] determine a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for a concentration of the target chemical in the emergency space to reach a concentration threshold;

[0036] evaluate the protection effectiveness of the emergency space based on the first diffusion time and a monitoring time required for the target chemical diffusing to be monitored in the emergency space with protection.

[0037] In a third aspect, the present application further provides a computer device. The computer device comprises a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0038] obtain distances between an emergency space and each of the chemical storage devices in a chemical storage site, and determine a ventilation rate of the emergency space to the outside world;

[0039] determine a target storage device from the chemical storage devices based on the chemical parameters of the chemical stored in each of the chemical storage devices, the distances, and the ventilation rate, the target storage device being a chemical storage device that, in the absence of protective treatment of the emergency space, would affect habitability of the emergency space in the event of chemical diffusion;

[0040] determine a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for a concentration of the target chemical in the emergency space to reach a concentration threshold;

[0041] evaluate the protection effectiveness of the emergency space based on the first diffusion time and a monitoring time required for the target chemical diffusing to be monitored in the emergency space with protection.

[0042] In a fourth aspect, the present application further provides a computer readable storage medium. The computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the following steps:

[0043] obtain distances between an emergency space and each of the chemical storage devices in a chemical storage site, and determine a ventilation rate of the emergency space to the outside world;

[0044] determine a target storage device from the chemical storage devices based on the chemical parameters of the chemicals stored in each of the chemical storage devices, the distances, and the ventilation rates, the target storage device being a chemical storage device that, in the event of chemical diffusion, would affect habitability of the emergency space if the emergency space were not protected;

[0045] determine a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for a concentration of the target chemical in the emergency space to reach a concentration threshold;

[0046] evaluate the protection effectiveness of the emergency space based on the first diffusion time and a monitoring time required for the target chemical diffusing to be monitored in the emergency space with protection.

[0047] In a fifth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the following steps:

[0048] obtain distances between an emergency space in a chemical storage site and each of the chemical storage devices, and determine a ventilation rate of the emergency space to the outside world;

[0049] determine a target storage device from the chemical storage devices based on the chemical parameters of the chemicals stored in each of the chemical storage devices, the distances, and the ventilation rates, the target storage device being a chemical storage device that, in the event of chemical diffusion, would affect habitability of the emergency space if the emergency space were not protected;

[0050] determine a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for a concentration of the target chemical in the emergency space to reach a concentration threshold;

[0051] evaluate the protection effectiveness of the emergency space based on the first diffusion time and a monitoring time required for the target chemical diffusing to be monitored in the emergency space with protection.

[0052] The method, device, computer device, storage medium and computer program product for evaluating the protection effectiveness of the emergency space against toxic chemicals, first acquire the distances between the emergency space and each chemical storage device in the chemical storage site, determine the air exchange rate of the emergency space and the outside world, and then determine the target storage device from each chemical storage device based on the chemical parameters of the chemicals stored in each chemical storage device, the distances and the air exchange rate, that is, based on the actual data of the chemical storage site to be evaluated, the target storage device to be considered is screened out to improve the evaluation efficiency. The target storage device is a chemical storage device that will affect the habitability of the emergency space when the chemical diffusion occurs without protection of the emergency space. Then, the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and the concentration of the target chemical in the emergency space to reach the concentration threshold is determined. Based on the first diffusion time and the monitoring time required for monitoring the diffused target chemical in the protected emergency space, the protection effectiveness of the emergency space is evaluated. In the entire evaluation process, complex model data processing is not required, and the parameters involved in the evaluation process are simple, such as the first diffusion time and the monitoring time, which can be accurately obtained through the actual data of the chemical storage site, so that the protection effectiveness of the emergency space can be accurately and quickly evaluated. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 An application environment diagram of the method for evaluating the protection effectiveness of the emergency space against toxic chemicals in an embodiment;

[0054] Figure 2 A flowchart of the method for evaluating the protection effectiveness of the emergency space against toxic chemicals in an embodiment;

[0055] Figure 3 A flowchart of the method for evaluating the protection effectiveness of the emergency space against toxic chemicals in another embodiment;

[0056] Figure 4 A flowchart of the method for evaluating the protection effectiveness of the emergency space against toxic chemicals in another embodiment;

[0057] Figure 5 A structural block diagram of the device for evaluating the protection effectiveness of the emergency space against toxic chemicals in an embodiment;

[0058] Figure 6 An internal structure diagram of the computer device in an embodiment. DETAILED DESCRIPTION

[0059] In order to make the purposes, technical solutions and advantages of the present application clearer, further detailed description will be given below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0060] The method for evaluating the protection effectiveness of the emergency space against toxic chemicals provided by the embodiments of the present application can be applied in the application environment as shown in Figure 1 The terminal 102 communicates with the server 104 through a network. The data storage system can store data required to be processed by the server 104. The data storage system can be integrated on the server 104, or placed on a cloud or other network server. The server 104 can obtain the distances between the emergency space and each chemical storage device in the chemical storage site, and determine the air exchange rate of the emergency space and the outside world, so as to determine a target storage device from each chemical storage device based on the chemical parameters of the chemical stored in each chemical storage device, the distances and the air exchange rate, wherein the target storage device is a chemical storage device that will affect the habitability of the emergency space when chemical diffusion occurs without protection processing of the emergency space. Then, the server 104 can determine a first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and the concentration of the target chemical in the emergency space reaches a concentration threshold, and evaluate the protection effectiveness of the emergency space based on the first diffusion time and a monitoring time required for monitoring the diffused target chemical in the protected emergency space. The terminal 102 can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices and the like that store data related to evaluating the protection effectiveness of the emergency space against toxic chemicals. The server 104 can be implemented by an independent server or a server cluster composed of multiple servers.

[0061] In one embodiment, as shown in Figure 2 , a method for evaluating the protection effectiveness of the emergency space against toxic chemicals is provided. Taking the server in Figure 1 as an example, the method includes the following steps:

[0062] Step 202, obtaining the distances between the emergency space and each chemical storage device in the chemical storage site, and determining the air exchange rate of the emergency space and the outside world.

[0063] The chemical storage site can be a large, medium or small site storing toxic chemicals, such as a nuclear power plant, a thermal power plant, etc. In addition, some of the toxic chemicals stored in the chemical storage site have volatility. In the case of leakage, if a certain concentration is reached in the air, it may have a negative impact on the staff of the site. The emergency space in the chemical storage site can be a facility equipped with a ventilation system and a personnel residence area, so that in the event of a chemical leakage accident, the staff can maintain the normal operation of the site in the emergency space. Therefore, it is necessary to evaluate the impact of toxic chemical leakage on the habitability of the emergency space and whether the emergency space is effective in protecting against toxic chemicals. A space with habitability indicates that personnel can stay in the area for a long time without negative effects on their health. Taking a nuclear power plant as an example, the emergency space can include a main control room and a ventilation system. The air exchange rate between the emergency space and the outside world is the ratio between the amount of air entering the emergency space per unit time and the volume of the emergency space.

[0064] Alternatively, the server can first determine the chemical storage site that needs to be evaluated, then based on the layout of the chemical storage site, obtain the distance between the emergency space and each chemical storage device in the chemical storage site, and then obtain the air exchange rate between the emergency space and the outside world from the control system of the emergency space, so as to determine the chemical storage device that will affect the habitability of the emergency space in the case of toxic chemical leakage according to the distances and the air exchange rate.

[0065] Step 204, based on the chemical parameters of the chemical stored in each chemical storage device, the distances and the air exchange rate, determine the target storage device from each chemical storage device, which is the chemical storage device that will affect the habitability of the emergency space in the case of chemical diffusion without protection treatment of the emergency space.

[0066] The chemical parameters at least include: the type of chemical, the actual weight of the stored chemical, the toxicity limit value (unit: mg / m 3 ) of the chemical. The number of target storage devices is at least one.

[0067] Alternatively, for each chemical storage device, the server can determine the toxicity limit value of the chemical based on the type of chemical in the chemical storage device, and determine whether the chemical device is a target storage device based on the toxicity limit value, the distance between the chemical storage device and the emergency space, and the actual weight of the chemical stored in the chemical storage device. In order to simulate the leakage of toxic chemicals in the target chemical device, so as to evaluate whether the emergency space is effective in protecting against the leaked chemicals in the target chemical device in the case of toxic chemical leakage in the target chemical device.

[0068] Step 206, determining a first diffusion time required for the target chemical in the target storage device to diffuse into the emergency space with protection and the concentration of the target chemical in the emergency space to reach the concentration threshold.

[0069] The concentration threshold can be the concentration limit of a chemical dangerous to life or health (IDLH), which is derived from the chemical concentration limit provided by NUREG 6624. Although the effect is based on 30-minute exposure level, if the concentration threshold is not reached in time, it is likely to have a negative impact on the staff. The first diffusion time refers to the time required for the concentration of the target chemical in the personnel residence area of the emergency space to reach the concentration threshold, from the beginning of the diffusion of the target chemical into the air inlet of the emergency space.

[0070] Optionally, assuming that the target chemical in the target storage device diffuses into the emergency space and the concentration of the target chemical exceeds the concentration threshold of the target chemical when diffusing into multiple areas in the emergency space, the server can determine the first diffusion time required for the concentration of the target chemical in the emergency facility to reach the concentration threshold based on the actual data of the chemical storage site.

[0071] For example, in a nuclear power plant, if the target chemical diffuses into the main control room of the nuclear power plant and the concentration of the target chemical exceeds the concentration threshold of the target chemical when diffusing into the air inlet of the main control room and the personnel residence area of the main control room, the server can further determine the first diffusion time required for the concentration of the target chemical in the personnel residence area of the main control room to reach the concentration threshold based on the related data of the main control room and the ventilation system. The first diffusion time in this example refers to the time required for the concentration of the target chemical in the personnel residence area of the main control room to reach the concentration threshold, from the beginning of the diffusion of the target chemical into the air inlet of the main control room.

[0072] Step 208, evaluating the effectiveness of the protection of the emergency space based on the first diffusion time and the monitoring time required for the monitoring device to monitor the diffused target chemical in the emergency space with protection.

[0073] The emergency space with protection is installed with various monitoring devices, which constitute a monitoring system of the emergency space, for monitoring the concentration of toxic chemicals in the air in the emergency space.

[0074] Optionally, the server can obtain the monitoring time required for the monitoring system in the emergency space to monitor various toxic chemicals from historical test data of the monitoring system of the emergency space, and for the target chemical, the server can evaluate the protection effectiveness of the emergency space for the target chemical by comparing the first diffusion time required for the target chemical and the monitoring time required for the monitoring system in the protected emergency space to monitor the diffused target chemical.

[0075] In the above method for evaluating the protection effectiveness of the emergency space against toxic chemicals, the distance between each chemical storage device and the emergency space in the chemical storage site is obtained first, the air exchange rate between the emergency space and the outside world is determined, and then the target storage device is determined from each chemical storage device based on the chemical parameters of the chemical stored in each chemical storage device, the distances and the air exchange rate, that is, based on the actual data of the chemical storage site to be evaluated, the target storage device to be considered is screened out to improve the evaluation efficiency. The target storage device is a chemical storage device that will affect the habitability of the emergency space when chemical diffusion occurs without protection treatment of the emergency space. Then, the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold is determined, and the protection effectiveness of the emergency space is evaluated based on the first diffusion time and the monitoring time required for the monitoring system in the protected emergency space to monitor the diffused target chemical. In the entire evaluation process, there is no need for complex model data processing, and the parameters involved in the evaluation process are simple, such as the first diffusion time and the monitoring time, which can be accurately obtained from the actual data of the chemical storage site, so that the protection effectiveness of the emergency space can be accurately and quickly evaluated.

[0076] In one embodiment, the target storage device is determined from each chemical storage device based on the chemical parameters of the chemical stored in each chemical storage device, the distances and the air exchange rate, comprising:

[0077] Based on the chemical parameters of the chemical stored in each chemical storage device, the distances and the air exchange rate, the weight threshold of the chemical stored in each chemical storage device is determined.

[0078] When the actual weight of the chemical stored in the chemical storage device exceeds the corresponding weight threshold, the chemical storage device is regarded as the target storage device.

[0079] Wherein, the actual weight of the chemical stored in the chemical storage device exceeding the corresponding weight threshold value indicates that the storage of toxic chemicals in the chemical storage device may cause the leakage of toxic chemicals in the chemical storage device, which may destroy the habitability of the emergency space. Therefore, it is necessary to further evaluate whether the protection of the emergency space is effective for the target chemical leaked from the target chemical storage device.

[0080] Optionally, for each chemical storage device, the server can first determine the default weight threshold of the chemical stored in the chemical storage device based on the distance between the chemical storage device and the emergency space under the default chemical parameters and the default air exchange rate, and then convert the default weight threshold based on the actual chemical parameters of the chemical stored in the chemical storage device and the actual air exchange rate between the emergency space and the outside world to determine the actual weight threshold of the chemical stored in the chemical storage device. When the actual weight of the chemical stored in the chemical storage device exceeds the corresponding actual weight threshold of the chemical storage device, the chemical storage device is regarded as a target storage device.

[0081] For example, taking a chlorine production station in a nuclear power plant as an example, it is assumed that 10 kg of chlorine gas is stored in the chlorine production station (the gas toxicity limit of chlorine gas is 45 mg / m 3 ), the distance between the chlorine production station and the main control room of the nuclear power plant is 1 km, and the air exchange rate of the main control room obtained by the server from the control system of the nuclear power plant is 0.15 (15% of the volume of air in the main control room is replaced by outside air in 1 hour). The server can first determine the default weight threshold of the chlorine gas stored in the chlorine production station as 0.18 tons based on the records related to toxic gases in section III.2 of HAD 101 / 04 Appendix, under the condition that the distance between the chlorine production station and the main control room is 1 km and the default air exchange rate is 1.2. HAD 101 / 04 is “External Human Induced Events for Site Selection of Nuclear Power Plants”.

[0082] Further, since the gas toxicity limit of chlorine gas in the chlorine production station is close to the default gas toxicity limit (50 mg / m 3 ) in HAD 101 / 04 Appendix III.2, the process of converting the actual weight threshold based on the default weight threshold can only be based on the actual air exchange rate of the main control room, as shown in formula (1):

[0083]

[0084] Wherein, M S is the actual weight threshold of the chlorine gas stored in the chlorine gas station, M0 is the default weight threshold of the chlorine gas stored in the chlorine gas station, σ Sσ0 is the default ventilation rate of the main control room to the outside world. Since the actual weight of the chlorine gas stored in the chlorine production station is far less than the actual weight threshold corresponding to the chlorine production station, the chlorine production station does not need to be a target chemical storage device, and further analysis of the chemical leakage of the chlorine production station is not needed.

[0085] In this embodiment, according to the actual parameters of the chemical storage site (chemical parameters, distance between the chemical storage device and the emergency space, ventilation rate of the emergency space), the target chemical storage device that may have a negative impact on the habitability of the emergency space in the case of leakage of the stored toxic chemicals is screened out, which is beneficial to reduce the evaluation range and improve the evaluation efficiency.

[0086] In one of the embodiments, before the first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and the concentration of the target chemical in the emergency space reaches the concentration threshold, the first concentration of the target chemical at the air inlet of the emergency space is determined.

[0087] When the first concentration exceeds the concentration threshold, the second concentration of the target chemical in the target storage device diffusing to the personnel residence area of the emergency space with protection through the air inlet of the emergency space is determined.

[0088] When the first concentration exceeds the concentration threshold, the second concentration of the target chemical in the target storage device diffusing to the personnel residence area of the emergency space with protection through the air inlet of the emergency space is determined.

[0089] The first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and the concentration of the target chemical in the emergency space to reach the concentration threshold, includes:

[0090] When the second concentration exceeds the concentration threshold, the first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and the concentration of the target chemical in the emergency space to reach the concentration threshold is determined.

[0091] Optionally, when the emergency space in a certain chemical storage site needs to be evaluated, the server can simulate the leakage of the target chemical based on the actual environmental data of the chemical storage site, and determine the first concentration of the target chemical at the air inlet of the emergency space with protection when the target chemical in the target storage device diffuses to the air inlet, when the first concentration exceeds the concentration threshold, it is determined that the leakage of the target chemical has the possibility of affecting the habitability of the emergency space, otherwise, further analysis of the target chemical is stopped.

[0092] After determining that the first concentration exceeds the concentration threshold, the server can determine a second concentration of the target chemical in the target storage device diffusing through the air intake of the protected emergency space to the personnel inhabitable area of the protected emergency space within a duration of the diffusion of the target chemical, and further determine that the target chemical has a possibility of affecting the habitability of the emergency space when the second concentration exceeds the concentration threshold, or stop further analysis of the target chemical.

[0093] After determining that the second concentration exceeds the concentration threshold, the server can further determine a first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and reach the concentration threshold in the emergency space, so as to evaluate the effectiveness of the protection of the emergency space based on the first diffusion time.

[0094] In the embodiment, through the two screenings of the first concentration and the second concentration, the target chemical that has a leakage but does not affect the habitability of the emergency space can be screened out, and only the target chemical whose second concentration exceeds the concentration threshold is further evaluated, so that the range of target chemicals to be evaluated is reduced, and the evaluation efficiency is improved.

[0095] In one of the embodiments, before determining the first concentration of the target chemical at the air intake of the protected emergency space when the target chemical in the target storage device diffuses to the air intake of the protected emergency space, the method comprises:

[0096] Determining a release rate of the target chemical based on a release environment of the target chemical in the target storage device;

[0097] Determining an atmospheric dispersion factor of the target chemical based on environmental data of an environment in which the chemical storage site is located;

[0098] Determining the first concentration of the target chemical at the air intake of the protected emergency space when the target chemical in the target storage device diffuses to the air intake of the protected emergency space, comprises:

[0099] Determining the first concentration of the target chemical at the air intake based on the release rate and the atmospheric dispersion factor.

[0100] The release environment comprises an area size of a leakage position of the target chemical in the target storage device and a type of the leakage position, such as which of a container, a pipeline and a valve the leakage position belongs to. The unit of the release rate of the target chemical is g / s. The atmospheric dispersion factor is an atmospheric dispersion factor on a center line of a smoke plume in a Gaussian smoke plume center line model, and the unit is s / m. 3 The actual environmental data of the environment in which the chemical storage site is located comprises a wind speed and a wind direction.

[0101] Optionally, the server can determine the release rate of the target chemical based on the release environment of the target chemical in the target storage device, in combination with the physical properties and chemical properties of the target chemical, and determine the atmospheric dispersion factor of the target chemical based on the actual environmental data of the environment where the chemical storage site is located, so as to determine the first concentration of the target chemical at the air inlet based on the release rate and the atmospheric dispersion factor.

[0102] Optionally, the server can determine the atmospheric dispersion factor γ of the target chemical by formula (2):

[0103]

[0104] wherein σ y is the transverse dispersion parameter after considering the building wake effect and low wind speed correction, σ z is the vertical dispersion parameter after considering the building wake effect and low wind speed correction, σ y , σ z Unit: m. U is the hourly wind speed, unit: m / s.

[0105] Optionally, the server can determine the first concentration χ1 of the target chemical at the air inlet by formula (3):

[0106] χ1= β· γ (3)

[0107] wherein χ1 is the first concentration of the target chemical at the air inlet, β is the release rate of the target chemical, and γ is the atmospheric dispersion factor of the target chemical.

[0108] In this embodiment, the first concentration of the target chemical at the air inlet is quickly determined through the release rate and the atmospheric dispersion factor of the target chemical, so as to screen the target chemical to be evaluated based on the first concentration. In addition, the processes of determining the release rate, the atmospheric dispersion factor and the first concentration in this embodiment do not involve complex calculation and complex model, and are determined based on the actual data of the target chemical and the actual environmental data of the chemical storage site. The first concentration can be quickly and accurately determined, and the effectiveness of the protection of the emergency space for the target chemical can be quickly and accurately evaluated.

[0109] In one of the embodiments, when the first concentration exceeds the concentration threshold value, the second concentration of the target chemical in the target storage device diffused to the personnel residence area of the emergency space with protection through the air inlet of the emergency space is determined, comprising:

[0110] When the first concentration exceeds the concentration threshold value, the duration of the diffusion of the target chemical is taken as the second diffusion time;

[0111] determine a second concentration of the target chemical in the target storage device diffusing into the personnel inhabitable area of the emergency space through the air intake of the emergency space based on the second diffusion time, the fresh air volume of the air intake, the volume of the personnel inhabitable area, and the first concentration.

[0112] wherein the first concentration exceeding the concentration threshold value indicates that if the target chemical diffuses into the personnel inhabitable area from the air intake, the habitability of the personnel inhabitable area of the emergency space can be destroyed, and further evaluation is needed, and thus the second concentration needs to be further determined. The unit of the fresh air volume of the air intake is m 3 / h. The duration of the diffusion of the target chemical indicates the time required from the occurrence of the leakage of the target chemical to the stop of the leakage of the target chemical, and is related to the total amount of leakage and the release rate of the target chemical in the target storage device. In the embodiment, the total amount of leakage and the type of leakage of the chemical can be selected according to actual evaluation requirements. Considering the concentration of the target chemical in the personnel inhabitable area, the concentration gradually increases as the duration of the leakage of the target chemical continues to grow, and thus the concentration of the target chemical in the personnel inhabitable area during the duration of the leakage of the target chemical needs to be further evaluated.

[0113] Optionally, when the first concentration of the target chemical exceeds the concentration threshold value, the server can preliminarily determine that the leakage of the target chemical has the possibility of destroying the habitability of the emergency space and can have a negative impact on the personnel in the personnel inhabitable area, and further analysis of the leakage of the target chemical is needed. Further, the server can determine the duration of the diffusion (leakage) of the target chemical as the second diffusion time based on the total amount of leakage and the release rate of the target chemical, and thus determine the second concentration of the target chemical in the target storage device diffusing into the personnel inhabitable area of the emergency space through the air intake of the emergency space based on the second diffusion time, the fresh air volume of the air intake, the volume of the personnel inhabitable area, and the first concentration.

[0114] Optionally, the server can determine the second concentration χ2 by formula (4):

[0115]

[0116] wherein χ1 is the first concentration, α is the fresh air volume of the air intake, V is the volume of the personnel inhabitable area, and T0 is the second diffusion time. It is easy to understand that the second concentration does not exceed the concentration threshold value, indicating that the concentration of the target chemical in the personnel inhabitable area will not reach the concentration threshold value until the end of the leakage of the target chemical.

[0117] Exemplarily, when the second concentration exceeds the concentration threshold value, the server can further determine that the leakage of the target chemical has the possibility of destroying the habitability of the emergency space, i.e., the concentration of the target chemical in the personnel residence area of the emergency space during the total leakage period of the leakage of the target chemical has the possibility of negatively affecting the staff, and further evaluation is needed. Before the target chemical reaches the threshold concentration, whether the protection measures in the emergency space can monitor the target chemical in advance. Therefore, the server needs to first determine the first diffusion time required for the target chemical in the target storage device to diffuse to the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold value. The first diffusion time is compared with the monitoring time required for monitoring the diffused target chemical in the protected emergency space. Through the comparison result, it is evaluated whether the protection of the emergency space against the target chemical is effective. The server can determine the first diffusion time T1 through formula (5):

[0118]

[0119] Wherein, δ1 is the concentration threshold value of the target chemical, V is the volume of the personnel residence area, α is the fresh air volume of the air inlet, χ1 is the first concentration at the air inlet.

[0120] In this embodiment, the process of determining the second concentration does not involve complex calculation and complex model, and is based on the actual environmental data of the chemical storage site that needs to be simulated and evaluated. The second concentration can be quickly and accurately determined, and the effectiveness of the protection of the emergency space can be quickly and accurately evaluated.

[0121] In one of the embodiments, the effectiveness of the protection of the emergency space is evaluated based on the first diffusion time and the monitoring time required for monitoring the diffused target chemical in the protected emergency space, which comprises:

[0122] When the monitoring time is less than the first diffusion time, it is determined that the protection of the emergency space is effective.

[0123] After it is determined that the protection of the emergency space is effective when the monitoring time is less than the first diffusion time, the method further comprises:

[0124] Obtaining the olfactory threshold concentration of the target chemical;

[0125] Determining the third diffusion time required for the concentration of the target chemical in the emergency space to reach the olfactory threshold concentration;

[0126] When the third diffusion time is less than the first diffusion time, it is determined that the protection of the emergency space is effective.

[0127] The olfactory threshold concentration of the target chemical refers to that, for a chemical with an odor, when the concentration of the chemical reaches the olfactory threshold concentration, the human body can smell the odor of the chemical. The olfactory threshold concentration is less than the concentration threshold. The third diffusion time refers to the time required for the concentration of the target chemical in the personnel residence area of the emergency space to reach the olfactory threshold concentration, starting from the target chemical diffusing to the air inlet of the emergency space.

[0128] Optionally, when the monitoring time is less than the first diffusion time, it is determined that the protection of the monitoring device in the emergency space is effective, indicating that the server can monitor the target chemical when the concentration of the target chemical in the personnel residence area reaches the concentration threshold, so that the server can start the corresponding early warning and start the sustainable protection measures, thereby ensuring the habitability of the personnel residence area in the emergency facility in the case of leakage of the target chemical, and ensuring that the staff can still reside in the personnel residence area.

[0129] Further, for the emergency space configured with both the monitoring device and the artificial monitoring, when the third diffusion time is less than the first diffusion time, it is indicated that the monitoring personnel in the emergency space can smell the target chemical when the concentration of the target chemical in the personnel residence area reaches the concentration threshold, and send relevant instructions to the server, so that the server can start the corresponding early warning and start the sustainable protection measures, thereby ensuring that the staff can still reside in the personnel residence area in the case of leakage of the target chemical.

[0130] Optionally, the server can determine the third diffusion time by formula (6):

[0131]

[0132] Wherein, δ2 is the olfactory threshold concentration of the target chemical, V is the volume of the personnel residence area, α is the fresh air volume of the air inlet, χ1 is the first concentration at the air inlet.

[0133] In this embodiment, not only the monitoring time of the detection device is evaluated, but also the monitoring time of the artificial monitoring is evaluated to evaluate the protection effectiveness of the emergency space, which can evaluate the protection measures of the device and the artificial in the emergency space, that is, more comprehensive evaluation, which is beneficial to timely find the loopholes of the protection measures of the emergency space, so as to timely increase the protection measures and improve the habitability of the emergency space. It can be understood that for the emergency space configured with only the monitoring device / artificial monitoring, the server only needs to evaluate whether the protection of the monitoring device / artificial monitoring is effective.

[0134] In one embodiment, as Figure 3As shown, based on the above toxic chemical protection effectiveness evaluation method of emergency space, another flowchart of the toxic chemical protection effectiveness evaluation method of emergency space is provided, and the main process includes:

[0135] The server can first perform preliminary screening on the chemical storage device. If the chemical storage device is screened out, it indicates that the storage of volatile toxic chemicals in the chemical storage device is insufficient to affect the habitability of the emergency space. If the chemical storage device is not screened out, it indicates that the storage of volatile toxic chemicals in the chemical storage device may affect the habitability of the emergency space and needs further analysis.

[0136] Further, for the leaked chemicals in the chemical storage device that is not screened out, the server can calculate the chemical concentration at the air inlet of the emergency space ventilation system based on the release rate of the chemical leaked into the environment and the atmospheric diffusion factor of the chemical. If the chemical concentration at the air inlet is lower than the concentration threshold (IDLH) of the chemical, it is determined that the concentration of the chemical diffused into the emergency space is insufficient to affect the habitability of the emergency space. If the chemical concentration at the air inlet is higher than the IDLH of the chemical, it is determined that the leakage of volatile toxic chemicals in the chemical storage device may affect the habitability of the emergency space and needs further analysis.

[0137] For the case where the chemical concentration at the air inlet is higher than the IDLH of the chemical, the server can further calculate the chemical concentration level when the chemical diffuses to the personnel residence area of the emergency space. If the chemical concentration when diffusing to the personnel residence area is lower than the IDLH, it is determined that the concentration of the chemical diffused into the emergency space is insufficient to affect the habitability of the emergency space. If the chemical concentration when diffusing to the personnel residence area is higher than the concentration threshold IDLH, it is determined that the leakage of volatile toxic chemicals in the chemical storage device may affect the habitability of the emergency space and needs further analysis.

[0138] For the case where the chemical concentration when diffusing to the personnel residence area is higher than the IDLH of the chemical, the server can further calculate the time required for the chemical concentration to reach the IDLH, and compare the monitoring time required to monitor the chemical with the time required to reach the IDLH.

[0139] If the monitoring time of the monitoring device is less than the time required to reach the IDLH, and the emergency space can start continuous protection, it is determined that the protection of the emergency space is effective. If the emergency space cannot start continuous protection, it is indicated that additional protection measures need to be added to the emergency space.

[0140] If the monitoring time of the monitoring device is greater than the time required to reach the IDLH, the time required for the concentration of the chemical in the personnel residence area to reach the olfactory threshold concentration is further calculated. If the time required to reach the olfactory threshold concentration is less than the time required to reach the IDLH, and the emergency space can start continuous protection, it is determined that the protection of the emergency space is effective, and if the emergency space cannot start continuous protection, it is characterized that protection measures need to be added to the emergency space.

[0141] If the time required to reach the olfactory threshold concentration is greater than the time required to reach the IDLH, it is characterized that the existing protection of the emergency space is ineffective, and protection measures need to be added.

[0142] In another embodiment, as shown in Figure 4 based on the above-mentioned toxic chemical protection effectiveness evaluation method of the emergency space, another flowchart of the toxic chemical protection effectiveness evaluation method of the emergency space is provided, mainly including the following steps:

[0143] Step 402, the distance between each chemical storage device and the emergency space in the chemical storage site is obtained, and the air exchange rate of the emergency space with the outside is determined;

[0144] Step 404, based on the chemical parameters of each chemical storage device respectively storing the chemical, the distances and the air exchange rate, the weight threshold of each chemical storage device respectively storing the chemical is determined;

[0145] Step 406, when the actual weight of the chemical stored by the chemical storage device exceeds the corresponding weight threshold of the chemical storage device, the chemical storage device is taken as a target storage device, wherein the target storage device is a chemical storage device that will affect the habitability of the emergency space when the chemical diffuses without protection of the emergency space;

[0146] Step 408, based on the release environment of the target chemical in the target storage device, the release rate of the target chemical is determined, and based on the environmental data of the environment where the chemical storage site is located, the atmospheric dispersion factor of the target chemical is determined;

[0147] Step 410, based on the release rate and the atmospheric dispersion factor, the first concentration of the target chemical at the air inlet is determined, and when the first concentration exceeds the concentration threshold, the duration of the diffusion of the target chemical is taken as the second diffusion time;

[0148] Step 412, based on the second diffusion time, the fresh air volume of the air inlet, the volume of the personnel residence area, and the first concentration, the second concentration of the target chemical in the target storage device diffusing to the personnel residence area of the emergency space with protection through the air inlet of the emergency space is determined;

[0149] Step 414, when the second concentration exceeds the concentration threshold, determining a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with the protection and the concentration of the target chemical in the emergency space to reach the concentration threshold;

[0150] Step 416, when the monitoring time is less than the first diffusion time, determining that the protection of the emergency space is effective;

[0151] Step 418, obtaining an olfactory threshold concentration of the target chemical, and determining a third diffusion time required for the concentration of the target chemical in the emergency space to reach the olfactory threshold concentration;

[0152] Step 420, when the third diffusion time is less than the first diffusion time, determining that the protection of the emergency space is effective.

[0153] It should be understood that, although each step in the flowchart involved in each embodiment as described above is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other sequences. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or steps or stages in other steps.

[0154] Based on the same inventive concept, the embodiments of the present application also provide an emergency space toxic chemical protection effectiveness evaluation device for implementing the above-mentioned emergency space toxic chemical protection effectiveness evaluation method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more emergency space toxic chemical protection effectiveness evaluation device embodiments provided below can refer to the limitations of the emergency space toxic chemical protection effectiveness evaluation method described above, which will not be repeated here.

[0155] In one embodiment, as shown in FIG. 1, an emergency space toxic chemical protection effectiveness evaluation device is provided, which comprises a data acquisition module, a target storage device determination module, a diffusion time determination module and an effectiveness evaluation module, wherein: Figure 5

[0156] The data acquisition module is configured to acquire the distance between the emergency space and each chemical storage device in the chemical storage site, and determine the air exchange rate of the emergency space and the outside world;

[0157] ​The target storage device determination module is configured to determine a target storage device from the chemical storage devices based on chemical parameters of the chemicals stored in each of the chemical storage devices, the distances, and the ventilation rate, the target storage device being a chemical storage device that, in the event of chemical diffusion, would affect the habitability of the emergency space if the emergency space is not protected.

[0158] The diffusion time determination module is configured to determine a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for the concentration of the target chemical in the emergency space to reach the concentration threshold.

[0159] The effectiveness evaluation module is configured to evaluate the protection effectiveness of the emergency space based on the first diffusion time and a monitoring time required for monitoring the diffused target chemical in the emergency space with protection.

[0160] In the device embodiment, in addition to the device-only embodiment, embodiments of all method items corresponding to device items are also required.

[0161] In the above toxic chemical protection effectiveness evaluation device for the emergency space, the distances between the emergency space and each of the chemical storage devices in the chemical storage site are obtained, the ventilation rate between the emergency space and the outside world is determined, and then, based on the chemical parameters of the chemicals stored in each of the chemical storage devices, the distances, and the ventilation rate, a target storage device is determined from the chemical storage devices, that is, based on the actual data of the chemical storage site to be evaluated, the target storage device to be considered is screened out to improve the evaluation efficiency. The target storage device is a chemical storage device that, in the event of chemical diffusion, would affect the habitability of the emergency space if the emergency space is not protected. Then, a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for the concentration of the target chemical in the emergency space to reach the concentration threshold is determined, and the protection effectiveness of the emergency space is evaluated based on the first diffusion time and a monitoring time required for monitoring the diffused target chemical in the emergency space with protection. In the entire evaluation process, complex model data processing is not required, and the parameters involved in the evaluation process are simple, such as the first diffusion time and the monitoring time, which can be accurately obtained through the actual data of the chemical storage site, so that the protection effectiveness of the emergency space can be accurately and quickly evaluated.

[0162] In one of the embodiments, the target storage device determining module is further configured to determine a weight threshold of the chemical stored in each chemical storage device based on the chemical parameter of the chemical stored in each chemical storage device, the distance and the ventilation rate, and to determine the target storage device when the actual weight of the chemical stored in the chemical storage device exceeds the corresponding weight threshold of the chemical storage device.

[0163] In one of the embodiments, the toxic chemical effectiveness evaluation device of the emergency space further comprises a concentration determining module configured to determine a first concentration of the target chemical at the air inlet of the emergency space with protection when the target chemical in the target storage device diffuses to the air inlet of the emergency space with protection, and to determine a second concentration of the target chemical in the personnel residing area of the emergency space with protection when the target chemical in the target storage device diffuses to the air inlet of the emergency space with protection when the first concentration exceeds the concentration threshold. Further, the diffusion time determining module is further configured to determine a first diffusion time required for the target chemical in the target storage device to diffuse to the emergency space with protection and for the concentration of the target chemical in the emergency space to reach the concentration threshold when the second concentration exceeds the concentration threshold.

[0164] In one of the embodiments, the toxic chemical effectiveness evaluation device of the emergency space further comprises a preprocessing module configured to determine a release rate of the target chemical based on the release environment of the target chemical in the target storage device, to determine an atmospheric dispersion factor of the target chemical based on the environmental data of the environment where the chemical storage site is located, and to determine the first concentration of the target chemical at the air inlet based on the release rate and the atmospheric dispersion factor.

[0165] In one of the embodiments, the toxic chemical effectiveness evaluation device of the emergency space further comprises a second concentration determining module configured to determine a second diffusion time of the diffusion of the target chemical when the first concentration exceeds the concentration threshold, and to determine the second concentration of the target chemical in the personnel residing area of the emergency space with protection based on the second diffusion time, the fresh air volume of the air inlet, the volume of the personnel residing area, and the first concentration when the target chemical in the target storage device diffuses to the air inlet of the emergency space with protection.

[0166] In one of the embodiments, the effectiveness evaluation module is further configured to determine that the protection of the emergency space is effective when the monitoring time is less than the first diffusion time, to obtain an olfactory threshold concentration of the target chemical, to determine a third diffusion time required for the concentration of the target chemical in the emergency space to reach the olfactory threshold concentration, and to determine that the protection of the emergency space is effective when the third diffusion time is less than the first diffusion time.

[0167] The modules in the toxic chemical protection effectiveness evaluation device for emergency space can be implemented by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the modules.

[0168] In one embodiment, a computer device, which can be a server, is provided, and an internal structure diagram of the computer device can be as shown in Figure 6 The computer device includes a processor, a memory, an input / output interface (I / O), and a communication interface. The processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for running the operating system and the computer program in the non-volatile storage medium. The database of the computer device is configured to store toxic chemical protection effectiveness evaluation data for emergency space. The input / output interface of the computer device is configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to communicate with terminals outside through a network connection. The computer program is executed by the processor to implement a toxic chemical protection effectiveness evaluation method for emergency space.

[0169] Those skilled in the art can understand that Figure 6 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. A specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0170] In one embodiment, a computer device is provided, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0171] In one embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps in the above method embodiments.

[0172] In one embodiment, a computer program product is provided, including a computer program. The computer program is executed by a processor to implement the steps in the above method embodiments.

[0173] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of the country and region.

[0174] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing related hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the processes of the above-mentioned embodiments of each method can be included. Any reference to a memory, database or other medium used in the embodiments provided by the present application can include at least one of a non-volatile and volatile memory. The non-volatile memory can include a read-only memory (Read-Only Memory, ROM), a magnetic tape, a floppy disk, a flash memory, an optical storage, a high-density embedded non-volatile memory, a resistive memory (ReRAM), a magnetoresistive random access memory (Magnetoresistive Random Access Memory, MRAM), a ferroelectric memory (Ferroelectric Random Access Memory, FRAM), a phase change memory (Phase Change Memory, PCM), a graphene memory, etc. The volatile memory can include a random access memory (Random Access Memory, RAM) or an external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The database involved in the embodiments provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided by the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0175] The technical features of the above embodiments can be combined in any way. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0176] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for evaluating the effectiveness of protection against toxic chemicals in emergency spaces, characterized in that, The method includes: Obtain the distance between the emergency space and each chemical storage device in the chemical storage site, and determine the ventilation rate between the emergency space and the outside. Based on the chemical parameters of the chemicals stored in each of the aforementioned chemical storage devices, the distances and the ventilation rate, a target storage device is determined from the aforementioned chemical storage devices. The target storage device is a chemical storage device that, without protective measures for the emergency space, would affect the habitability of the emergency space in the event of chemical diffusion. The first concentration of the target chemical at the air inlet is determined when the target chemical in the target storage device diffuses to the air inlet of the protected emergency space; When the first concentration exceeds the concentration threshold, a second concentration is determined, indicating that the target chemical in the target storage device diffuses through the air inlet of the emergency space to the personnel residence area of ​​the protected emergency space. When the second concentration exceeds the concentration threshold, a first diffusion time is determined for the target chemical in the target storage device to diffuse into the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold. The effectiveness of the protection of the emergency space is assessed based on the first diffusion time and the monitoring time required to detect the diffusion of the target chemical in the protected emergency space.

2. The method according to claim 1, characterized in that, The step of determining the target storage device from the chemical storage devices based on the chemical parameters of the chemicals stored in each of the chemical storage devices, the distances, and the ventilation rate includes: Based on the chemical parameters of the chemicals stored in each of the chemical storage devices, the distances, and the ventilation rate, a weight threshold for the chemicals stored in each of the chemical storage devices is determined. When the actual weight of the chemicals stored in the chemical storage device exceeds the weight threshold corresponding to the chemical storage device, the chemical storage device is designated as the target storage device.

3. The method according to claim 2, characterized in that, The method further includes: For each of the aforementioned chemical storage devices, based on the distance between the chemical storage device and the emergency space, a default weight threshold for the chemicals stored in the chemical storage device is determined under default chemical parameters and default ventilation rate. Based on the actual chemical parameters of the chemicals stored in the chemical storage device and the actual ventilation rate between the emergency space and the outside world, the default weight threshold is converted to determine the weight threshold of the chemicals stored in the chemical storage device.

4. The method according to claim 1, characterized in that, When determining that a target chemical in the target storage device has diffused to the air inlet of the protected emergency space, the target chemical, prior to a first concentration at the air inlet, includes: The release rate of the target chemical is determined based on the release environment of the target chemical in the target storage device; Based on environmental data of the environment where the chemical storage site is located, the atmospheric dispersion factor of the target chemical is determined; When it is determined that a target chemical in the target storage device has diffused into the air inlet of the protected emergency space, the first concentration of the target chemical at the air inlet includes: Based on the release rate and the atmospheric dispersion factor, a first concentration of the target chemical at the air inlet is determined.

5. The method according to claim 1, characterized in that, The step of determining a second concentration of the target chemical in the target storage device that diffuses through the air inlet of the emergency space to the personnel-residence area of ​​the protected emergency space when the first concentration exceeds the concentration threshold includes: When the first concentration exceeds the concentration threshold, the duration of diffusion of the target chemical is taken as the second diffusion time; Based on the second diffusion time, the fresh air volume of the air inlet, the volume of the personnel residence area, and the first concentration, a second concentration of the target chemical in the target storage device is determined to diffuse through the air inlet of the emergency space to the personnel residence area of ​​the protected emergency space.

6. The method according to claim 1, characterized in that, The assessment of the protective effectiveness of the emergency space, based on the first diffusion time and the monitoring time required to detect the diffusion of the target chemical in the protected emergency space, includes: When the monitoring time is less than the first diffusion time, the protection of the emergency space is determined to be effective; After determining that the protection of the emergency space is effective when the monitoring time is less than the first diffusion time, the method further includes: Obtain the olfaction threshold concentration of the target chemical; Determine the third diffusion time required for the concentration of the target chemical in the emergency space to reach the olfaction threshold concentration; When the third diffusion time is less than the first diffusion time, the protection of the emergency space is determined to be effective.

7. A device for assessing the effectiveness of protection against toxic chemicals in emergency spaces, characterized in that, The device includes: The data acquisition module is used to acquire the distance between the emergency space and each chemical storage device in the chemical storage site, and to determine the ventilation rate between the emergency space and the outside. The target storage device determination module is used to determine a target storage device from each of the chemical storage devices based on the chemical parameters of the chemicals stored in each of the chemical storage devices, the distances and the ventilation rate. The target storage device is a chemical storage device that, in the event of chemical diffusion, would affect the habitability of the emergency space if the emergency space is not protected. A concentration determination module is used to determine a first concentration of the target chemical at the air inlet when the target chemical in the target storage device diffuses to the air inlet of the protected emergency space; and when the first concentration exceeds a concentration threshold, to determine a second concentration of the target chemical in the target storage device diffuses to the personnel-residence area of ​​the protected emergency space through the air inlet of the emergency space. A diffusion time determination module is used to determine, when the second concentration exceeds the concentration threshold, a first diffusion time required for the target chemical in the target storage device to diffuse into the protected emergency space and for the concentration of the target chemical in the emergency space to reach the concentration threshold; An effectiveness assessment module is used to assess the protective effectiveness of the emergency space based on the first diffusion time and the monitoring time required to detect the diffusion of the target chemical in the protected emergency space.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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