阅读说明：本技术 一种基于电子预案的化工厂紧急事故的辅助处置方法 (Auxiliary disposal method for chemical plant emergency based on electronic plan ) 是由 王建中 吕彬峰 王再富 薛安克 俞天明 蒋贤武 于 2019-09-09 设计创作，主要内容包括：本发明涉及化工厂安全监管技术领域,具体涉及一种基于电子预案的化工厂紧急事故的辅助处置方法,包括以下步骤：A)建立电子预案；B)读取化工厂DCS数据,获得化工厂当前监控数据,若化工厂的监控数据符合报警条件则进入步骤C,反之,重复本步骤；C)触发报警条件对应的电子预案,将被触发的电子预案的事故处置方法和跟踪表显示给值班人员,读取最新的化工厂DCS数据,若跟踪表的数据满足跟踪触发条件,则发出报警并显示对应的跟踪处置方法,返回步骤B继续执行。本发明的实质性效果是：提高事故处置的效率和合理性；能够及时发现事故的扩大,能够跟踪化工厂区域的状态。(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.)

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 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.

2. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 1,

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.

3. The auxiliary treatment method for emergency accidents in chemical plants based on electronic pre-planning as claimed in claim 2, wherein the method for dividing the areas between chemical plant equipments and between equipments and buildings into sub-areas in step a1 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.

4. The auxiliary treatment method for emergency accidents in chemical plants based on electronic pre-planning as claimed in claim 3, wherein the method for dividing the areas between chemical plant equipments and between equipments and buildings into sub-areas in step A1 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.

5. The auxiliary treatment method for emergency accidents in chemical plants based on electronic pre-planning as claimed in claim 4, wherein in step A15, the side length threshold is the distance traveled by the temperature of the fire source in T time under windless conditions when the accident occurred in the area of the chemical plant is a fire accident.

6. The auxiliary treatment method for emergency accidents in chemical plants based on electronic pre-planning as claimed in claim 5, wherein step a15 is further provided with a second side length threshold, where the second side length threshold is a distance that a leakage center will spread within T time under windless conditions when an accident occurring in the area of the chemical plant 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.

7. An auxiliary treatment method for chemical plant emergency based on electronic scheme as claimed in claim 2 or 3 or 4 or 5 or 6,

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 ω_A＝δ_n·ω_EWherein ω is_AConcentration of hazardous gas, omega, in sub-zones_EThe average value of the concentration of the dangerous gas in a region of a distance l near a leakage source is shown, n represents the number of periods T at the time when the gas leakage occurs at the updating time, and delta_nRepresenting the coefficient of the nth period T updating, the value of which is obtained by the preset table query, n < n_maxWhen is delta_nIncreases with the increase of n, n is more than or equal to n_maxWhen is delta_n＝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 at the downwind mouth of the adjacent device, ω_A＝ω_E|(n-1)。

8. The auxiliary treatment method for emergency accidents in chemical plants based on electronic pre-planning of claim 7, wherein the step C2 of sequentially updating the status of the sub-areas with the adjacent areas according to the status information of the sub-areas comprises:

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.

9. The auxiliary treatment method for emergency accidents in chemical plants based on electronic pre-planning as claimed in claim 8, wherein 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.

10. An auxiliary treatment method for chemical plant emergency based on electronic pre-planning as claimed in claim 9,

step C also includes the steps of:

C4) listing sub-areas with state data not exceeding a preset safety threshold value, taking the sub-areas as safety sub-areas, listing the positions of the employees of the chemical plant and the positions of the safety exits, continuously searching the safety sub-areas from the positions of the employees in sequence until the employees reach the positions of the safety exits, forming a safety evacuation path, informing corresponding employees of the chemical plant of the path change, and sending an alarm and displaying the alarm to an attendant if the safety sub-areas can not be found and can reach the safety exits;

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.

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 there is no wind, the temperature of the sub-region is updated according to the heat conduction rule, if there is wind, the sub-region is located in the windMaintaining the temperature of the sub-area at the upper wind port of the adjacent equipment, and if wind exists and the sub-area is positioned at the lower wind port of the adjacent equipment, setting the temperature of the sub-area 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 ω_A＝δ_n·ω_EWherein ω is_AConcentration of hazardous gas, omega, in sub-zones_EThe average value of the concentration of the dangerous gas in a region of a distance l near a leakage source is shown, n represents the number of periods T at the time when the gas leakage occurs at the updating time, and delta_nRepresenting the coefficient of the nth period T updating, the value of which is obtained by the preset table query, n < n_maxWhen is delta_nIncreases with the increase of n, n is more than or equal to n_maxWhen is delta_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 at the downwind mouth of the adjacent device, ω_A＝ω_E|(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.