CN110806728B - Auxiliary disposal method for chemical plant emergency based on electronic plan - Google Patents
Auxiliary disposal method for chemical plant emergency based on electronic plan Download PDFInfo
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Abstract
The invention relates to the technical field of chemical plant safety supervision, in particular to an auxiliary disposal method for chemical plant emergency accidents based on electronic plans, which comprises the following steps: A) establishing an electronic plan; B) reading DCS data of the chemical plant to obtain current monitoring data of the chemical plant, entering the step C if the monitoring data of the chemical plant meets the alarm condition, and otherwise, repeating the step; C) triggering an electronic plan corresponding to the alarm condition, displaying an accident handling method and a tracking table of the triggered electronic plan to an operator on duty, reading the latest DCS data of the chemical plant, if the data of the tracking table meets the tracking trigger condition, sending out an alarm and displaying a corresponding tracking handling method, and returning to the step B to continue executing. The substantial effects of the invention are as follows: the efficiency and the rationality of accident disposal are improved; the expansion of accidents can be found in time, and the state of the chemical plant area can be tracked.
Description
Technical Field
The invention relates to the technical field of chemical plant safety supervision, in particular to an auxiliary disposal method for chemical plant emergency accidents based on electronic plans.
Background
The production process control of a chemical plant is subjected to manual operation control, conventional instrument control, computer centralized control and DCS control. The DCS is an acronym of Distributed Control System (Distributed Control System), which is also called a Distributed Control System. The main characteristics of DCS are "decentralized control" and "centralized management". DCS generally employs several controllers, i.e., process stations, to control a plurality of control points in a production process, and the controllers are connected via a network and can exchange data. The production control operation adopts a computer operation station, is connected with the controller through a network, collects production data and transmits an operation instruction. The DCS is structurally divided into a process level, an operation level, and a management level. The process level is composed of a process control station, an I/O unit and a field instrument, and is the main implementation part of the system control function. The operation stage comprises an operator station and an engineer station, and operation monitoring and configuration maintenance of the system are completed. The management level refers to a factory management information system, and monitoring data of the chemical factory can be acquired from the management level of the DCS. Although the production process control of the chemical plant realizes electronization and automation, the safety accident handling plan of the chemical plant does not reach the level of automatic operation. In case of safety accidents in a chemical plant, the production process is greatly influenced, huge loss is brought to chemical enterprises, and meanwhile, great damage is brought to chemical plant staff and the surrounding environment. Therefore, it is an urgent subject to be studied to realize the electronic planning of emergency accidents and to provide the emergency treatment assistance function.
If chinese patent CN107331087A, published 2017, 11/7, an intelligent voice broadcast system for petrochemical plants includes a positioning base station and an identification card wirelessly connected to the positioning base station, wherein the positioning base station can automatically acquire the position of the identification card connected to the positioning base station, and automatically sends a voice prompt message for prompting an operator wearing the identification card to the identification card according to the position of the identification card and the identity of the identification card, and associates the alarm voice with the position of the operator and the identity authority of the operator, thereby realizing different operation scenes and different personnel positions, providing an accurate and effective prompt function for the operators in the petrochemical plants, and improving the operation specifications of the petrochemical plants and the personal safety of the operators. However, it can only implement convenient message notification, cannot fully use the monitoring data of the chemical plant, and cannot provide reference to the state and accident development of the chemical plant.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem that a scheme for effectively combining a pre-arranged plan and chemical plant monitoring data to assist accident treatment is lacked at present. The auxiliary disposal method for the emergency accidents of the chemical plant based on the electronic plan can improve the accident disposal efficiency and the reasonableness.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an auxiliary treatment method for chemical plant emergency accidents based on electronic plans comprises the following steps: A) establishing an electronic pre-arranged plan, wherein the electronic pre-arranged plan comprises an object, an alarm condition, an accident type, pre-arranged plan content, a tracking table, a tracking trigger condition and a release condition, the tracking table records a monitoring data item tracked and monitored by the object when the accident type occurs, the monitoring data item is determined manually according to the pre-arranged plan and a chemical plant structure, the pre-arranged plan content comprises an accident handling method and a tracking handling method, and the tracking handling method is a handling method of the monitoring data item of the tracking table when the tracking trigger condition is met; B) reading DCS data of the chemical plant to obtain current monitoring data of the chemical plant, entering the step C if the monitoring data of the chemical plant meets the alarm condition, and otherwise, repeating the step; C) triggering an electronic plan corresponding to the alarm condition, displaying an accident handling method and a tracking table of the triggered electronic plan to an operator on duty, reading the latest DCS data of the chemical plant, if the data of the tracking table meets the tracking trigger condition, sending out an alarm and displaying a corresponding tracking handling method, and returning to the step B to continue executing. The accident handling and the monitoring data are butted through the electronic plan, when a safety accident occurs and the monitoring data is abnormal, the corresponding electronic plan is called out to guide the accident handling, and the efficiency and the rationality of the accident handling are improved; the tracking table tracks monitoring data items related to accident development in time, so that the expansion of accidents can be found in time, reference is provided for accident disposal, and the accident loss is reduced.
Preferably, step a further comprises: A1) importing a GIS (geographic information System) model of a chemical plant, dividing areas among chemical plant equipment and between the equipment and a building into sub-areas, and establishing an area supervision table for each sub-area, wherein the area supervision table comprises area positions, adjacent equipment, adjacent areas and state information, the state information comprises temperature, dangerous gas concentration, dangerous gas types, wind directions and wind power, and the monitoring data of a DCS (distributed control System) of the chemical plant comprises the wind directions and the wind power data of all the areas of the chemical plant; step C also includes: C1) updating the state of the equipment of the chemical plant according to the monitoring data of the chemical plant, and updating the state information of the subarea with the adjacent equipment according to the state of the equipment of the chemical plant; C2) sequentially updating the state of the subareas with the adjacent areas according to the state information of the subareas; C3) and displaying the sub-region and the state information of the sub-region which change over the preset threshold value compared with the state before the accident to the operator on duty. By dividing the areas, the recording and tracking of the area states of the chemical plant can be facilitated, and the state tracking efficiency is accelerated.
Preferably, in step a1, the method for dividing the area between chemical plant devices and between the devices and the building into sub-areas comprises the following steps: A11) removing the pipeline and the equipment with the volume smaller than a set threshold value; A12) establishing an external cuboid of the equipment; A13) fill the cuboid region between extension cuboid and chemical plant building, make the cuboid region satisfy: faces next to at least one circumscribed cuboid, and having a face overlapping with a face having the smallest area among the faces of the next-to-circumscribed cuboid; A14) and D, regarding the cuboid area filled in the step A13 as an external cuboid of the equipment, repeating the step A13 until the chemical plant is filled with the external cuboid and the cuboid area, and taking the obtained cuboid area as the divided sub-area. The subregion of cuboid shape divides, can be quick divide the chemical plant region to simplify subregion model, simultaneously, this scheme can also be convenient the tie point and the state correlation between equipment and the subregion.
Preferably, in step a1, the method for dividing the areas between chemical plant devices and between the devices and the building into sub-areas further comprises the steps of: A15) setting a side length threshold, and dividing the sub-area with the side length larger than the side length threshold into a plurality of sub-areas to ensure that the side lengths are smaller than the side length threshold. The states in the same sub-region are regarded as the same everywhere, and the size of the region is limited by using the side length threshold, so that the condition information tracking error caused by overlarge sub-regions can be avoided.
Preferably, in step a15, the side length threshold is a conduction distance of the fire source temperature within T time under the windless condition when the accident occurring in the chemical plant area is a fire accident. The maximum side length threshold is set, and after the equipment with the volume smaller than the threshold is removed, the side length of the sub-region can be ensured to be within a range equivalent to that of the equipment, and when a fire occurs and no wind exists, the temperature is transferred to the sub-region in each period T, so that the change of a temperature field is approximately simulated, and the tracking of the temperature change is provided.
Preferably, in the step a15, a second side length threshold is further set, where the second side length threshold is a distance that a leakage center spreads within T time under a windless condition when an accident occurring in the chemical plant area is a dangerous gas leakage; dividing sub-regions and respectively storing the sub-regions by respectively using the side length threshold and the second side length threshold; when the fire occurs in the chemical plant area, the sub-area corresponding to the side length threshold is used, when the dangerous gas leakage occurs in the chemical plant area, the sub-area corresponding to the second side length threshold is used, and if the fire and the dangerous gas leakage occur simultaneously, the sub-area corresponding to the smaller value of the side length threshold and the second side length threshold is selected for division. When different accident types occur, different side length thresholds are adopted, and the accuracy of accident development simulation can be improved.
Preferably, in step C1, the method for updating the status information of the sub-area having the neighboring device according to the status of the chemical plant device includes: C11) if the adjacent equipment does not have an accident, maintaining the state information of the subareas; C12) if the fire accident happens to the adjacent equipment, updating the temperature of the sub-area, specifically: if no wind exists, updating the temperature of the sub-region according to a heat conduction rule, if wind exists and the sub-region is positioned at an upper wind inlet of the adjacent equipment, maintaining the temperature of the sub-region, and if wind exists and the sub-region is positioned at a lower wind inlet of the adjacent equipment, setting the temperature of the sub-region as the monitoring temperature of the adjacent equipment in the last period T; C13) if the adjacent equipment has dangerous gas leakage accidents, updating the dangerous gas concentration and the dangerous gas type of the sub-area, specifically: if there is no wind, then ωA＝n·ωEWherein ω isAConcentration of hazardous gas, omega, in sub-zonesEIs the average value of the concentration of the dangerous gas in a region of a distance l near a leakage source, n represents the number of periods T of the current updating time when the gas leaks,nrepresenting the coefficient of the nth period T updating, the value of which is obtained by the preset table query, n < nmaxWhen the temperature of the water is higher than the set temperature,nincreases with the increase of n, n is more than or equal to nmaxWhen the temperature of the water is higher than the set temperature,n1 is ═ 1; if there is wind and the sub-area is located at the upwind of the adjacent equipment, hazardous gas of the sub-area is maintainedConcentration; if there is wind and the sub-area is located at the downwind mouth of the adjacent device, ωA＝ωE|(n-1). By adopting the scheme, the state information of the sub-region can be updated rapidly, and the influence on timeliness of event follow-up caused by too long calculation time is avoided.
Preferably, in step C2, the method of sequentially updating the state of the sub-regions having the adjacent regions based on the state information of the sub-regions includes: C21) enumerating all the adjacent areas of the sub-areas with updated state information, regarding the enumerated sub-areas as the adjacent devices of the adjacent areas, and then executing steps C12-C13; C22) step C21 is repeatedly performed until the chemical plant area is entirely divided into sub-areas.
Preferably, step C further comprises the steps of: C4) and listing sub-areas which change no more than a preset safety threshold value compared with the state before the accident, taking the sub-areas as safety sub-areas, listing the positions of the staff posts of the chemical plant and the positions of the safety exits, continuously searching the safety sub-areas from the positions of the staff posts of each staff in sequence until the safety exits are reached, forming a safety evacuation path, informing corresponding staff of the chemical plant of the path change, and sending an alarm and displaying the alarm to the staff on duty if the safety sub-areas cannot be found and the safety exits are reached. The evacuation route can be determined by the aid of the evacuation route determining device, so that confusion and unnecessary loss are avoided.
Preferably, step C further comprises the steps of: C5) calculating state data of all sub-areas in the (N + N) th period T, taking the state data as delay state data, listing the sub-areas which change no more than a preset safety threshold compared with the state before the accident, taking the sub-areas as delay safety sub-areas, continuously searching the delay safety sub-areas from the post position of each employee in sequence, and if the delay safety sub-areas cannot be found and reach a safety exit, giving an alarm and displaying the alarm to the operator on duty. The optimal scheme provides predictive accident state prediction, can timely find the staff with evacuation danger, timely alarm and inform the staff, so that the staff can be evacuated in time, and casualties are effectively avoided.
The substantial effects of the invention are as follows: the accident handling and the monitoring data are butted through the electronic plan, when a safety accident occurs and the monitoring data is abnormal, the corresponding electronic plan is called out to guide the accident handling, and the efficiency and the rationality of the accident handling are improved; the tracking table tracks monitoring data items related to accident development in time, so that the expansion of accidents can be found in time, reference is provided for accident disposal, and the accident loss is reduced; by dividing the areas, the recording and tracking of the area states of the chemical plant can be facilitated, and the state tracking efficiency is accelerated.
Drawings
FIG. 1 is a flow diagram of an embodiment.
FIG. 2 is a block diagram of a flowchart of a method for dividing a sub-region according to an embodiment.
Fig. 3 is a flowchart of a sub-region status information updating method according to an embodiment.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
The first embodiment is as follows:
an auxiliary treatment method for emergency accidents in chemical plants based on electronic plans is disclosed, as shown in fig. 1, the embodiment includes the following steps: A) the method comprises the steps of establishing an electronic plan, wherein the electronic plan comprises an object, an accident type, plan content, a tracking table, a tracking triggering condition and a removing condition, the tracking table records a monitoring data item of the object, which is tracked and monitored when the accident type occurs, and is determined manually according to the plan and a chemical plant structure, the plan content comprises an accident handling method and a tracking handling method, and the tracking handling method is a handling method of the monitoring data item of the tracking table when the tracking triggering condition is met. Executing: A1) and importing a GIS model of the chemical plant, dividing areas among chemical plant equipment and between the equipment and a building into sub-areas, establishing an area supervision table for each sub-area, wherein the area supervision table comprises area positions, adjacent equipment, adjacent areas and state information, the state information comprises temperature, dangerous gas concentration, dangerous gas types, wind directions and wind power, and the monitoring data of the DCS of the chemical plant comprises the wind directions and the wind power data of each area of the chemical plant. As shown in fig. 2, the method for dividing the area between chemical plant devices and between the devices and the building into sub-areas comprises the following steps: A11) removing the pipeline and the equipment with the volume smaller than a set threshold value; A12) establishing an external cuboid of the equipment; A13) fill the cuboid region between extension cuboid and chemical plant building, make the cuboid region satisfy: faces next to at least one circumscribed cuboid, and having a face overlapping with a face having the smallest area among the faces of the next-to-circumscribed cuboid; A14) taking the cuboid region filled in the step A13 as an external cuboid of the equipment, repeating the step A13 until the chemical plant is filled with the external cuboid and the cuboid region, and taking the obtained cuboid region as a divided sub-region; A15) setting a side length threshold, and dividing the sub-area with the side length larger than the side length threshold into a plurality of sub-areas to ensure that the side lengths are smaller than the side length threshold. The side length threshold is the conduction distance of the fire source temperature in T time under the windless condition when an accident occurring in a chemical plant area is a fire accident. The maximum side length threshold is set, and after the equipment with the volume smaller than the threshold is removed, the side length of the sub-region can be ensured to be within a range equivalent to that of the equipment, and when a fire occurs and no wind exists, the temperature is transferred to the sub-region in each period T, so that the change of a temperature field is approximately simulated, and the tracking of the temperature change is provided.
B) And C, reading DCS data of the chemical plant to obtain current monitoring data of the chemical plant, entering the step C if the monitoring data of the chemical plant meets the alarm condition, and otherwise, repeating the step.
C) Triggering an electronic plan corresponding to the alarm condition, displaying an accident handling method and a tracking table of the triggered electronic plan to an operator on duty, reading the latest DCS data of the chemical plant, if the data of the tracking table meets the tracking trigger condition, sending out an alarm and displaying a corresponding tracking handling method, and returning to the step B to continue executing. As shown in fig. 3, the method further includes: C1) updating the state of the equipment of the chemical plant according to the monitoring data of the chemical plant, and updating the state information of the subarea with the adjacent equipment according to the state of the equipment of the chemical plant; C2) sequentially updating the state of the subareas with the adjacent areas according to the state information of the subareas; C3) displaying the subareas which change over a preset threshold value compared with the state before the accident and the state information of the subareas to an attendant; C4) the enumeration has no more changes than the state before the accidentThe sub-areas passing through the preset safety threshold are used as safety sub-areas, the positions of the staff posts and the positions of the safety exits of the chemical plants are listed, the safety sub-areas are continuously searched from the positions of the staff posts in sequence until the staff posts reach the positions of the safety exits, a safety evacuation path is formed, the path is changed to inform corresponding staff of the chemical plants, and if the safety sub-areas can not be found to reach the safety exits, an alarm is sent out and displayed to staff on duty; C5) calculating state data of all sub-areas in the (N + N) th period T, taking the state data as delay state data, listing the sub-areas which change no more than a preset safety threshold compared with the state before the accident, taking the sub-areas as delay safety sub-areas, continuously searching the delay safety sub-areas from the post position of each employee in sequence, and if the delay safety sub-areas cannot be found and reach a safety exit, giving an alarm and displaying the alarm to the operator on duty. In step C1, the method for updating the status information of the sub-area having the neighboring device according to the status of the chemical plant device includes: C11) if the adjacent equipment does not have an accident, maintaining the state information of the subareas; C12) if the fire accident happens to the adjacent equipment, updating the temperature of the sub-area, specifically: if no wind exists, updating the temperature of the sub-region according to a heat conduction rule, if wind exists and the sub-region is positioned at an upper wind inlet of the adjacent equipment, maintaining the temperature of the sub-region, and if wind exists and the sub-region is positioned at a lower wind inlet of the adjacent equipment, setting the temperature of the sub-region as the monitoring temperature of the adjacent equipment in the last period T; C13) if the adjacent equipment has dangerous gas leakage accidents, updating the dangerous gas concentration and the dangerous gas type of the sub-area, specifically: if there is no wind, then ωA＝n·ωEWherein ω isAConcentration of hazardous gas, omega, in sub-zonesEIs the average value of the concentration of the dangerous gas in a region of a distance l near a leakage source, n represents the number of periods T of the current updating time when the gas leaks,nrepresenting the coefficient of the nth period T updating, the value of which is obtained by the preset table query, n < nmaxWhen the temperature of the water is higher than the set temperature,nincreases with the increase of n, n is more than or equal to nmaxWhen the temperature of the water is higher than the set temperature,n1 is ═ 1; if wind exists and the subarea is positioned at the upper wind port of the adjacent equipment, the dangerous gas concentration of the subarea is maintained; if there is wind and the sub-area is located in the neighborhoodLower wind gap of connecting equipment, then omegaA＝ωE|(n-1). By adopting the scheme, the state information of the sub-region can be updated rapidly, the influence on timeliness of event follow-up caused by too long calculation time is avoided, and certain accuracy and reference value are achieved.
In step C2, the method of sequentially updating the states of the sub-regions having the adjacent regions based on the state information of the sub-regions includes: C21) enumerating all the adjacent areas of the sub-areas with updated state information, regarding the enumerated sub-areas as the adjacent devices of the adjacent areas, and then executing steps C12-C13; C22) step C21 is repeatedly performed until the chemical plant area is entirely divided into sub-areas.
E) And C, if the monitoring data meet the removing condition, removing the electronic plan and returning to the step B, and otherwise, circularly executing the step C in a period T.
Example two:
the present embodiment further improves the setting of the threshold value of the side length on the basis of the first embodiment. On the basis of the first embodiment, in the step a15, a second side length threshold is further set, where the second side length threshold is a distance by which a leakage center spreads within T time under a windless condition when an accident occurring in a chemical plant area is a dangerous gas leakage; dividing sub-regions and respectively storing the sub-regions by respectively using the side length threshold and the second side length threshold; when the fire occurs in the chemical plant area, the sub-area corresponding to the side length threshold is used, when the dangerous gas leakage occurs in the chemical plant area, the sub-area corresponding to the second side length threshold is used, and if the fire and the dangerous gas leakage occur simultaneously, the sub-area corresponding to the smaller value of the side length threshold and the second side length threshold is selected for division. Compared with the first embodiment, the method has the advantages that different side length thresholds are adopted when different accident types occur, and the accuracy of accident development simulation can be improved.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (9)
1. An auxiliary treatment method of chemical plant emergency based on electronic plan is characterized in that,
the method comprises the following steps:
A) establishing an electronic plan, wherein the electronic plan comprises an object, an alarm condition, an accident type, plan content, a tracking table, a tracking trigger condition and a release condition, the plan content comprises an accident handling method and a tracking handling method, and the tracking handling method is a handling method of a monitoring data item of the tracking table when the tracking trigger condition is met;
B) reading DCS data of the chemical plant to obtain current monitoring data of the chemical plant, entering the step C if the monitoring data of the chemical plant meets the alarm condition, and otherwise, repeating the step;
C) triggering an electronic plan corresponding to the alarm condition, displaying an accident handling method and a tracking table of the triggered electronic plan to an operator on duty, reading latest DCS data of the chemical plant, if the data of the tracking table meets the tracking trigger condition, sending an alarm and displaying a corresponding tracking handling method, and returning to the step B to continue execution;
the step A also comprises the following steps:
A1) importing a GIS (geographic information System) model of a chemical plant, dividing areas among chemical plant equipment and between the equipment and a building into sub-areas, and establishing an area supervision table for each sub-area, wherein the area supervision table comprises area positions, adjacent equipment, adjacent areas and state information, the state information comprises temperature, dangerous gas concentration, dangerous gas types, wind directions and wind power, and the monitoring data of a DCS (distributed control System) of the chemical plant comprises the wind directions and the wind power data of all the areas of the chemical plant;
step C also includes:
C1) updating the state of the equipment of the chemical plant according to the monitoring data of the chemical plant, and updating the state information of the subarea with the adjacent equipment according to the state of the equipment of the chemical plant;
C2) sequentially updating the state of the subareas with the adjacent areas according to the state information of the subareas;
C3) and displaying the sub-region and the state information of the sub-region which change over the preset threshold value compared with the state before the accident to the operator on duty.
2. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 1,
in step a1, the method for dividing the area between chemical plant devices and between the devices and the building into sub-areas comprises the following steps:
A11) removing the pipeline and the equipment with the volume smaller than a set threshold value;
A12) establishing an external cuboid of the equipment;
A13) fill the cuboid region between extension cuboid and chemical plant building, make the cuboid region satisfy: faces next to at least one circumscribed cuboid, and having a face overlapping with a face having the smallest area among the faces of the next-to-circumscribed cuboid;
A14) and D, regarding the cuboid area filled in the step A13 as an external cuboid of the equipment, repeating the step A13 until the chemical plant is filled with the external cuboid and the cuboid area, and taking the obtained cuboid area as the divided sub-area.
3. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 2,
in step a1, the method for dividing the area between chemical plant devices and between the devices and the building into sub-areas further comprises the steps of:
A15) setting a side length threshold, and dividing the sub-area with the side length larger than the side length threshold into a plurality of sub-areas to ensure that the side lengths are smaller than the side length threshold.
4. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 3,
in step a15, the side length threshold is a conduction distance of the fire source temperature within T time under the windless condition when the accident occurring in the chemical plant area is a fire accident.
5. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 4,
step A15, a second side length threshold is further set, wherein the second side length threshold is a distance that a leakage center spreads within T time under a windless condition when an accident occurring in the chemical plant area is dangerous gas leakage;
dividing sub-regions and respectively storing the sub-regions by respectively using the side length threshold and the second side length threshold;
when the fire occurs in the chemical plant area, the sub-area corresponding to the side length threshold is used, when the dangerous gas leakage occurs in the chemical plant area, the sub-area corresponding to the second side length threshold is used, and if the fire and the dangerous gas leakage occur simultaneously, the sub-area corresponding to the smaller value of the side length threshold and the second side length threshold is selected for division.
6. An auxiliary treatment method for chemical plant emergency based on electronic scheme as claimed in claim 1 or 2 or 3 or 4 or 5,
in step C1, the method for updating the status information of the sub-area having the neighboring device according to the status of the chemical plant device includes:
C11) if the adjacent equipment does not have an accident, maintaining the state information of the subareas;
C12) if the fire accident happens to the adjacent equipment, updating the temperature of the sub-area, specifically: if no wind exists, updating the temperature of the sub-region according to a heat conduction rule, if wind exists and the sub-region is positioned at an upper wind inlet of the adjacent equipment, maintaining the temperature of the sub-region, and if wind exists and the sub-region is positioned at a lower wind inlet of the adjacent equipment, setting the temperature of the sub-region as the monitoring temperature of the adjacent equipment in the last period T;
C13) if the adjacent equipment has dangerous gas leakage accidents, updating the dangerous gas concentration and the dangerous gas type of the sub-area, specifically:
if there is no wind, then
Wherein
Is the concentration of the hazardous gas in the sub-area,
for distance near the source of leakage
The mean value of the concentration of the hazardous gas in the area,
the number of periods T from the time of gas leakage is shown at this time,
is shown as
The value of the coefficient during updating of each period T is obtained by the preset table query,
when the temperature of the water is higher than the set temperature,
followed by
Is increased by the increase of the number of the terminal,
when the temperature of the water is higher than the set temperature,
；
if wind exists and the subarea is positioned at the upper wind port of the adjacent equipment, the dangerous gas concentration of the subarea is maintained;
in case of wind and in the subregionAt the lower tuyere of the adjacent equipment, then
。
7. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 6,
in step C2, the method of sequentially updating the states of the sub-regions having the adjacent regions based on the state information of the sub-regions includes:
C21) enumerating all the adjacent areas of the sub-areas with updated state information, regarding the enumerated sub-areas as the adjacent devices of the adjacent areas, and then executing steps C12-C13;
C22) step C21 is repeatedly executed until the status information of all sub-areas is updated.
8. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 7,
step C also includes the steps of:
C4) and listing sub-areas which change no more than a preset safety threshold value compared with the state before the accident, taking the sub-areas as safety sub-areas, listing the positions of the staff posts of the chemical plant and the positions of the safety exits, continuously searching the safety sub-areas from the positions of the staff posts of each staff in sequence until the safety exits are reached, forming a safety evacuation path, informing corresponding staff of the chemical plant of the path change, and sending an alarm and displaying the alarm to the staff on duty if the safety sub-areas cannot be found and the safety exits are reached.
9. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 8,
step C also includes the steps of:
C5) calculate the first
One periodAnd in the T time, state data of all sub-regions are used as delay state data, the sub-regions with the change not exceeding a preset safety threshold compared with the state before the accident occurs are listed as delay safety sub-regions, the delay safety sub-regions are sequentially searched from the post position of each employee, and if the delay safety sub-regions cannot be found and reach a safety exit, an alarm is sent out and displayed to the staff on duty.
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