CN110426994A - A kind of chemical plant safety on line supervisory systems - Google Patents
A kind of chemical plant safety on line supervisory systems Download PDFInfo
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Abstract
The present invention relates to accidents to manage technical field, and in particular to a kind of chemical plant safety on line supervisory systems, comprising: data capture unit is communicated with the DCS in chemical plant, obtains the monitoring data in chemical plant and storage；Prediction scheme table subsystem, editor and storage prediction scheme table；Prediction scheme triggers subsystem, for analyzing chemical plant monitoring data in real time, judges whether there is prediction scheme and is triggered, be triggered if there is prediction scheme, recall corresponding prediction scheme table, connect with data capture unit and prediction scheme table subsystem；Prediction scheme tracing subsystem, when there is safety accident, periodicity analysis monitoring data dynamically updates the prediction scheme table being triggered, and connect with data capture unit, prediction scheme table subsystem and prediction scheme triggering subsystem；Display subsystem triggers subsystem with prediction scheme and prediction scheme tracing subsystem is connect for showing the prediction scheme table being triggered.Substantial effect of the invention is: perspective impact development situation is provided, keeps accident handling more targeted.
Description
Technical field
The present invention relates to accidents to manage technical field, and in particular to a kind of chemical plant safety on line supervisory systems.
Background technique
In all work safety accidents, the safety accident in chemical plant has obvious characteristic.The fire, quick-fried that chemical plant occurs
Fried accident not only often results in casualties and the heavy losses of property, is also easy to cause serious environmental problem, influences area nearby
Resident and construction in domain.There is high risk due to chemical plant safety accident and more influence extensively, the safety accident in chemical plant
Control technology, is all concerned all the time.Current chemical company all can have needle for all kinds of accident formulations such as fire, leakage
Pair accident prediction, and require employee by training be familiar with prediction scheme content, have certain grasp to accident handling method.But current
Chemical plant accident handling prediction scheme is voluntarily formulated by chemical plant, lacks unified reference and standard.Operator is encountering burst shape
When condition, it is easy raw random In danger, it is difficult to correctly be disposed in time according to the content of prediction scheme.Pole is brought to personnel and assets installation security
Big risk.
Although having had already appeared the chemical plant pre-warning system for monitoring based on artificial intelligence, such as Chinese patent
CN207992739U, a kind of intelligence plant produced monitoring system disclosed on October 19th, 2018, including picture control list
Member, sound monitoring unit and data monitoring unit；Picture control unit includes several cameras, and camera is for obtaining intelligence
The data output end of image in workshop, camera is connect by Image communicating module with the industrial personal computer for being located at backstage；Sound prison
Control unit includes that several sound obtain equipment, and sound obtains equipment and is used to obtain the sound in intelligent workshop, and sound acquisition is set
Standby data output end is connect by voice communication module with the industrial personal computer for being located at backstage；Data monitoring unit includes several energy consumptions
Monitor, energy consumption monitor are used to obtain the operation data of intelligent workshop, and the data output end of energy consumption monitor passes through data
Transmission module is connect with the industrial personal computer for being located at backstage.Its technical solution is raw using monitoring apparatus for production line information and necessary safety
Information is produced, realizes control and long-range monitoring.But its technical solution exists following insufficient: it is only realized to chemical plant production scene
Remotely watch, the function without data analysis and automatic alarm, to acquisition gained chemical plant production information, carrying out analysis is needed
Consume longer time and more hardware resource.It in accident treatment, often races against time, establishes complexity and time-consuming
Model carry out digital simulation be not appropriate for managing the accident in chemical plant.
Summary of the invention
The technical problem to be solved by the present invention is lacking the accurate chemical plant safety accident security control of rapid reaction at present
The technical issues of scheme.Propose a kind of chemical plant safety on line supervisory systems with quick state of affairs analytic function.
In order to solve the above technical problems, the technical solution used in the present invention are as follows: a kind of chemical plant safety on line supervision system
System, comprising: data capture unit is communicated with the DCS in chemical plant, obtains the monitoring data in chemical plant and storage；Prediction scheme table subsystem
System, editor and storage prediction scheme table；Prediction scheme triggers subsystem, for analyzing chemical plant monitoring data in real time, judges whether there is prediction scheme
It is triggered, is triggered if there is prediction scheme, recall corresponding prediction scheme table, connect with data capture unit and prediction scheme table subsystem
It connects；Prediction scheme tracing subsystem, when there is safety accident, periodicity analysis monitoring data dynamically updates the prediction scheme table being triggered,
It is connect with data capture unit, prediction scheme table subsystem and prediction scheme triggering subsystem；Display subsystem is triggered for showing
Prediction scheme table triggers subsystem with prediction scheme and prediction scheme tracing subsystem is connect.Prediction scheme table subsystem is electronic by prediction scheme, prediction scheme table
Triggering subsystem can call and show automatically corresponding emergency preplan when safety accident occurs, reduce to accident handling
The requirement of operator on duty, prediction scheme table tracing subsystem can track accident development, are continuously accident handling and provide data reference.
Preferably, the prediction scheme table subsystem includes prediction scheme table edit cell and prediction scheme table storage unit, the prediction scheme
Table includes prediction scheme object information, trigger condition, grade, promotion condition, classification prediction scheme content and condition subsequent, the prediction scheme object
Information includes object oriented, object type and subject area, and trigger condition is the item that monitoring data need to meet when triggering prediction scheme
Part, promotion condition are the condition that monitoring data need to meet when prediction scheme upgrades, and condition subsequent is that monitoring data need to expire when prediction scheme releases
The condition of foot, the grade expression incident classification are simultaneously corresponding with classification prediction scheme content；Prediction scheme triggers subsystem periodic reading prison
It controls data and is compared with prediction scheme table trigger condition, if monitoring data meets trigger condition, trigger corresponding prediction scheme table.By prediction scheme
Triggering is converted to monitoring data, so that the triggering of prediction scheme is standardized, in emergency management, has higher efficiency.
Preferably, the prediction scheme table further includes associated variable, associated variable include prediction scheme object region temperature,
Wind direction, wind speed, hazardous gas type and hazardous gas concentration.When the first accident occurs for chemical plant, surrounding devices can be made
At influence, more accidents may be caused, this variation can be tracked by associated variable, more fully accident feelings are provided
Condition.
Preferably, prediction scheme tracing subsystem executes following steps: A11 when there is the prediction scheme table being triggered) if it exists
Safety accident include fire behavior, then derive and update the temperature value of the associated variable of each prediction scheme table, safety accident if it exists
Including hazardous gas spillage, then the hazardous gas concentration of the associated variable of each prediction scheme table is derived and updates, in associated variable
Hazardous gas type is corresponding leakage type；A12 the prediction scheme being triggered and associated variable hair) are shown by display subsystem
Several maximum prediction schemes of changing；A13 monitoring data) is read, upgrades prediction scheme if meeting prediction scheme promotion condition, if meeting
Condition subsequent then releases prediction scheme；A14 step A11 to A13) is repeated, until prediction scheme releases or manually close prediction scheme.This is excellent
Scheme is selected to solve the problems, such as to be difficult in the prior art to carry out assessment tracking to the association influence that safety accident causes.Pass through conduct
It is preferred that the prediction scheme table further includes association trigger condition, prediction scheme triggers the associated variable of subsystem periodic reading prediction scheme table
Value, and corresponding prediction scheme table is triggered if the value of associated variable, which meets, is associated with trigger condition with trigger condition comparison is associated with.It is logical
Association triggering is crossed, can be after the accident, secondary accident caused by triggering in time because of accident carries out disposition in time, reduces thing
Therefore it loses.
Preferably, prediction scheme tracing subsystem executes following steps: A21 when there is the prediction scheme table being triggered) if it exists
Safety accident include fire behavior, then derive and update the temperature value of the associated variable of each prediction scheme table, and derive each after T time
The temperature value of the associated variable of prediction scheme table, as the temperature prediction value of associated variable, safety accident if it exists includes dangerous gas
Body leakage then derives and updates the hazardous gas concentration of the associated variable of each prediction scheme table, and each after derivation and display T time
The hazardous gas concentration of the associated variable of prediction scheme table, as the hazardous gas concentration prediction value of associated variable, in associated variable
Hazardous gas type is corresponding leakage type；A22 the prediction scheme being triggered and associated variable hair) are shown by display subsystem
Several maximum prediction schemes of changing；A23 monitoring data) is read, upgrades prediction scheme if meeting prediction scheme promotion condition, if meeting
Condition subsequent then releases prediction scheme；A24 step A21 to A23) is repeated, until prediction scheme releases or manually close prediction scheme.Pacifying
Entirely after the accident, Disposal Measures in place before, have one section of empty window phase T, accident this period can sustainable development variation.In usual field
Personnel by production to grasp accident situation and investment accident handling or withdraw 5~10 minutes of needs.Accident handling group
And the large-scale accidents disposal facility such as fire fighting truck marches into the arena and needs about 20 minutes.Thus predict from the beginning after twenty minutes
The range and intensity of accident, can make the disposition of accident more targeted.If it was found that the accident after deducing has exceeded the place of plant area
Ability is set, then from the beginning it is avoided that organizational accidents are disposed, but all one's effort establishment officer withdraws, and avoids casualties.
Preferably, T extends when there are prediction scheme upgrading.This preferred embodiment solves existing accident handling technology and lacks
Perspective problem.It deduces time T to extend, is capable of providing the accident state of affairs situation of the following longer time, there is accident handling
Specific aim and initiative.
Preferably, the prediction scheme table further includes association trigger condition, prediction scheme triggers subsystem periodic reading prediction scheme table
Associated variable value, and be associated with trigger condition comparison, if associated variable value meet association trigger condition, trigger correspondence
Prediction scheme table；Prediction scheme triggering subsystem periodic reading prediction scheme tracing subsystem is resulting, the temperature of the associated variable of prediction scheme table
Predicted value, hazardous gas concentration prediction value and hazardous gas type, if temperature prediction value, hazardous gas concentration prediction value and
Hazardous gas type meets association trigger condition, then triggers corresponding prediction scheme table, and mark triggers approach is prediction triggering.
Preferably, the method for deriving the temperature value of the associated variable of each prediction scheme table are as follows: if the prediction scheme object of prediction scheme table
With the isolation of the airflow channel in fire behavior region or the gas-flow resistance of airflow channel it is greater than given threshold, then the associated variable of prediction scheme table
Temperature value remains unchanged；If the prediction scheme object of prediction scheme table and the airflow channel resistance in fire behavior region are less than or equal to given threshold,
Then judge whether airflow channel region is calm, if calm, the temperature of the associated variable of prediction scheme table is obtained by air thermal conductivity law
Angle value judges the prediction scheme object of prediction scheme table whether in lower air port, if in lower air port, away from fire if there is wind in airflow channel region
Feelings time of origin t≤Ds/vwWhen interior, the temperature value of the associated variable of prediction scheme table is obtained by air heat conduction model, wherein DsIt is pre-
The shortest distance of case subject area and fire behavior region, vwFor wind speed, away from fire behavior time of origin t > Ds/vwWhen interior, the pass of prediction scheme table
The temperature value for joining variable is Cm,
Cm=β Ct, β ∈ [0.6,1]
CtFor the temperature value at the edge in fire behavior region, β is regulation coefficient, and prediction scheme subject area and fire behavior region distance are smaller, or
The airflow channel resistance in prediction scheme subject area and fire behavior region is got over hour, and β takes greater value, if the prediction scheme object of prediction scheme table is in the wind
Mouthful, then the temperature value of the associated variable of prediction scheme table is obtained by air thermal conductivity law.
Preferably, the method for deriving the hazardous gas concentration of the associated variable of each prediction scheme table are as follows: if prediction scheme table is pre-
Case object and the isolation of the airflow channel in hazardous gas spillage region or the gas-flow resistance of airflow channel are greater than given threshold, then prediction scheme
The hazardous gas concentration of the associated variable of table remains unchanged；If the air-flow of the prediction scheme object of prediction scheme table and hazardous gas spillage region
Channel resistance is less than or equal to given threshold, then eight orientation is evenly dividing in the horizontal direction centered on source of leaks, along vertical
Direction divides upper and lower two orientation and judges dangerous gas according to the workshop in chemical plant layout, hazardous gas density, wind direction and wind speed
Flow proportional δ of the body in 16 orientationr, r ∈ [1,16], then the hazardous gas concentration Q of the associated variable of prediction scheme tabley=δu·
Q, wherein δuThe prediction scheme subject area of prediction scheme table is indicated in the orientation of source of leaks, Q is the hazardous gas concentration at source of leaks.
Preferably, flow proportional δ of the hazardous gas in 16 orientationrMethod are as follows: determine the flow of horizontal direction
Than: it is laid out according to the workshop in chemical plant, selectes some airflow channel as reference channel, and then determine remaining horizontal seven orientation
Airflow channel resistance with respect to reference channel resistance ratios, if some direction airless channel, airflow channel resistance ratios be nothing
Poor big, using the inverse of the resistance ratios in each direction as weight, if leakage region has wind, several orientation of lower wind direction are by power
It reassigns and determines flow proportional, remaining orientation flow proportional is 0, if leaking area is calm, eight orientation in horizontal direction are pressed
Weight distribution determines flow proportional；Determine the flow-rate ratio of vertical direction: the gas if hazardous gas is attached most importance to, the flow proportional of upper position
It is 0, the flow proportional in eight directions in lower orientation is equal to flow proportional determined by horizontal direction, if hazardous gas density and sky
Gas phase is worked as, then the flow proportional in upper and lower orientation is respectively equal to the half of flow proportional determined by horizontal direction, if hazardous gas
Density is less than atmospheric density, then descending the flow proportional in orientation is 0, and the flow proportional in eight directions of upper position is equal to horizontal direction
Identified flow proportional.
Substantial effect of the invention is: make the foundation and management computerization of prediction scheme by prediction scheme table subsystem, improves
The efficiency of management of prediction scheme, the effect for making prediction scheme reduce causality loss are easier to play；The prediction scheme being triggered by automatic Display, makes thing
Therefore disposition operator on duty can clearly grasp accident situation, it is flurried to avoid；By the development of automatic deduction associated variable, mention
For perspective impact development situation, accident handling operator on duty is made to grasp the short-term development of accident, formulates disposal method more
With specific aim.
Detailed description of the invention
Fig. 1 is one structural schematic diagram of embodiment.
Fig. 2 is one prediction scheme tracing subsystem working method flow diagram of embodiment.
Fig. 3 is one associated variable temperature value-acquiring method flow diagram of embodiment.
Fig. 4 is one associated variable hazardous gas concentration acquisition methods flow diagram of embodiment.
Fig. 5 is one fire behavior accident schematic diagram of embodiment.
Fig. 6 is one hazardous gas spillage accident schematic diagram of embodiment.
Wherein: 100, chemical plant DCS, 101, air accumulator one, 102, exhaust pipe five, 103, air accumulator four, 200, data obtain
Take unit, 300, prediction scheme table subsystem, 301, one fire behavior prediction scheme table of air accumulator, 302, the leakage prediction scheme table of exhaust pipe five, 303, storage
Gas tank four leaks prediction scheme table, 304, the leakage prediction scheme table of office three, 401, prediction scheme triggering subsystem, 402, prediction scheme tracking subsystem
System, 500, display unit.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, a specific embodiment of the invention is further described in detail.
Embodiment one:
A kind of chemical plant safety on line supervisory systems, comprising: data capture unit 200 is communicated with the DCS in chemical plant, in not shadow
Under the premise of ringing the work of chemical plant DCS-100 technology controlling and process, whole monitoring datas in chemical plant are read simultaneously from chemical plant DCS-100
Storage, the optimal monitoring data is real time data, is secondly the data of small delay；Prediction scheme table subsystem 300, editor and storage are pre-
Case table, by interactive device, by being manually entered into prediction scheme table manually according to chemical plant accident handling rule by prediction scheme electronization
System 300, prediction scheme table subsystem 300 allow user to have access to and modify prediction scheme table, permission user custom parameter as needed or
Prediction scheme；Prediction scheme triggers subsystem 401, for analyzing chemical plant monitoring data in real time, judges whether there is prediction scheme and is triggered, if occurring
Prediction scheme is triggered, then recalls corresponding prediction scheme table, connect with data capture unit 200 and prediction scheme table subsystem 300；Prediction scheme with
Track subsystem 402, when there is safety accident, periodicity analysis monitoring data dynamically updates the prediction scheme table being triggered, with data
Acquiring unit 200, prediction scheme table subsystem 300 and prediction scheme triggering subsystem 401 connect；Display subsystem is touched for showing
The prediction scheme table of hair triggers subsystem 401 with prediction scheme and prediction scheme tracing subsystem 402 is connect, and display unit 500 includes that disposition is aobvious
Show unit 500, alarm indication unit 500 and execute display unit 500, disposition display unit 500 is used for accident handling value
Class personnel show the prediction scheme table being triggered, and alarm indication is used for superior administrative department or government's part alarm, executes
Display unit 500 shows the prediction scheme content needed to be implemented to scene of the accident employee.
As shown in table 1, one fire behavior prediction scheme table of air accumulator describes entitled air accumulator 1, and type is vertical gas storage tank,
Regional location be one tank of West, one of high span Stall to three buildings store the air accumulator of fuel gas in situation on fire
Prediction scheme content.Level-one fire behavior prediction scheme content is to carry fire extinguishing appliance by fire extinguishing group on duty, is put out initial stage, stable fire, is closed
Gas source valve；The trigger condition of level-one be corresponding position cigarette sense sensor-triggered alarm or tank surface measure temperature C > 160 DEG C and
Pressure inside the tank has abnormal loss.Since the prediction scheme indicator is to fire behavior, thus hazardous gas type: nothing, dangerous gas in the present embodiment
Body type refers mainly to toxic gas, and toxic combustible gas is treated before burning as toxic gas, treats after burning as fire behavior.
When the temperature being associated in trigger condition reaches 1200 DEG C, i.e., air accumulator 1 itself is intact, but since neighbouring gas tank body is deposited
In fire behavior, the pot temperature of air accumulator 1 is caused to reach 1200 DEG C, high temperature lower tank material deforms, and tank body generation is split
Seam, gas leakage, and then air accumulator 1 is caused to generate fire behavior, to trigger the fire behavior prediction scheme table of air accumulator 1.
1 air accumulator of table, one fire behavior prediction scheme table
As shown in Fig. 2, prediction scheme tracing subsystem 402 is by following methods, to thing when being triggered there are at least one prediction scheme table
Therefore impact development tracked.Specifically: A11) safety accident if it exists includes fire behavior, then and it derives and updates each prediction scheme
The temperature value of the associated variable of table, safety accident if it exists include hazardous gas spillage, then derive and update each prediction scheme table
Associated variable hazardous gas concentration, the hazardous gas type in associated variable is corresponding leakage type；A12) pass through display
Subsystem shows that the prediction scheme being triggered and associated variable change several maximum prediction schemes；A13 monitoring data) is read,
Prediction scheme is upgraded if meeting prediction scheme promotion condition, releases prediction scheme if meeting condition subsequent；A14 step A11) is repeated
To A13, until prediction scheme releases or manually close prediction scheme.
The derivation of the temperature value of associated variable is there are many mode, limit element artificial module in the prior art, heat transfer mould
The temperature value that type and thermal convection model may be incorporated for the present embodiment derives.But the present embodiment provides a kind of associated variable temperature
It is worth derivation mode.The advantages of which has speed fast, and derivation result necessarily restrains, is suitble to need in accident handling
Quickly provide the situation of reference result.As shown in figure 3, the temperature derivation method specifically: if the prediction scheme object of prediction scheme table and fire
The airflow channel in feelings region completely cuts off or the gas-flow resistance of airflow channel is greater than given threshold, then the temperature of the associated variable of prediction scheme table
Value remains unchanged.The resistance of airflow channel is tested by air-flow or flow dynamics analysis obtains, due to only needing to obtain channel
Between comparative resistance result.The present embodiment is used using the averga cross section area in channel and channel number of turns as determining air-flow
The foundation of channel resistance.If airflow channel angle of turn is accumulative more than 540 degree, judge that airflow channel resistance is greater than setting threshold
Value.The area of section of airflow channel be S, using fire behavior closest approach as the centre of sphere, with fire behavior closest approach reach airflow channel entrance away from
Surface area from the spherical shape for radius is SVIf S/SV< 0.1 then judges that airflow channel resistance is greater than given threshold.
If the prediction scheme object of prediction scheme table and the airflow channel resistance in fire behavior region are less than or equal to given threshold.Then judge gas
Whether circulation road region is calm, if calm, the temperature value of the associated variable of prediction scheme table is obtained by air heat conduction model, if gas
There is wind in circulation road region, then judges the prediction scheme object of prediction scheme table whether in lower air port, if in lower air port, away from fire behavior time of origin
t≤Ds/vwWhen interior, the temperature value of the associated variable of prediction scheme table is obtained by air heat conduction model, wherein DsFor prediction scheme subject area
With the shortest distance in fire behavior region, vwFor wind speed, away from fire behavior time of origin t > Ds/vwWhen interior, the temperature of the associated variable of prediction scheme table
Angle value
Cm=β Ct, β ∈ [0.6,1]
CtFor the temperature value at the edge in fire behavior region, β is regulation coefficient, and prediction scheme subject area and fire behavior region distance are smaller, or
The airflow channel resistance in prediction scheme subject area and fire behavior region is got over hour, and β takes bigger value, if the prediction scheme object of prediction scheme table is in the wind
Mouthful, then the temperature value of the associated variable of prediction scheme table is obtained by air heat conduction model.
Flow dynamics analysis and stream in the prior art can be used in the derivation method of the hazardous gas concentration of associated variable
Body finite element analysis, but time-consuming for flow dynamics analysis and finite element analysis, and result not necessarily restrains.Thus the present embodiment
With the following method, as shown in figure 4, this method specifically includes: if the prediction scheme object of prediction scheme table and hazardous gas spillage region
Airflow channel isolation or the gas-flow resistance of airflow channel are greater than given threshold, then the hazardous gas concentration of the associated variable of prediction scheme table
It remains unchanged；If the prediction scheme object of prediction scheme table and the airflow channel resistance in hazardous gas spillage region are less than or equal to setting threshold
Value, then be evenly dividing eight orientation in the horizontal direction centered on source of leaks, vertically divide upper and lower two orientation, altogether
16 orientation, specifically: Shang Xi, upper northwest, Shang Bei, upper northeast, Shang Dong, the upper southeast, Shang Nan, upper southwest, Shang Xi, upper west
North, Shang Bei, upper northeast, Shang Dong, the upper southeast, Shang Nan and upper southwest, below source of leaks and line and horizontal angle are greater than 5
Degree is lower section, remaining is accordingly to be regarded as top.According to the workshop in chemical plant layout, hazardous gas density, wind direction and wind speed, danger is judged
Flow proportional δ of the gas in 16 orientationr, r ∈ [1,16], flow proportional δ of the hazardous gas in 16 orientationrMethod
Are as follows: it determines the flow-rate ratio of horizontal direction: being laid out according to the workshop in chemical plant, select some airflow channel as reference channel, into
And determine the resistance ratios of the airflow channel resistance with respect to reference channel in remaining horizontal seven orientation, if some direction airless is logical
Road, then airflow channel resistance ratios are infinity, using the inverse of the resistance ratios in each direction as weight, if leakage region has wind,
Several orientation of wind direction are then descended to determine flow proportional by weight distribution, remaining orientation flow proportional is 0, if leaking area is calm,
Then eight orientation in horizontal direction determine flow proportional by weight distribution；Determine the flow-rate ratio of vertical direction: if hazardous gas
Attach most importance to gas, then the flow proportional of upper position is 0, and the flow proportional in eight directions in lower orientation is equal to stream determined by horizontal direction
Amount ratio, if hazardous gas density is suitable with air, the flow proportional in upper and lower orientation is respectively equal to determined by horizontal direction
The half of flow proportional, if hazardous gas density is less than atmospheric density, the flow proportional in lower orientation is 0, eight of upper position
The flow proportional in direction is equal to flow proportional determined by horizontal direction.Finally, the hazardous gas of the associated variable of prediction scheme table is dense
Spend Qy=δuQ, wherein δuThe prediction scheme subject area of prediction scheme table is indicated in the orientation of source of leaks, Q is the hazardous gas at source of leaks
Concentration.
As shown in figure 5, when the present embodiment meets with air accumulator 1 fire behavior occurs, the operation of the present embodiment and to accident
Guidance specifically:
When fire behavior occurs for air accumulator 1, one fire behavior prediction scheme table 301 of air accumulator is triggered, and prediction scheme table grade is one at this time, gas storage
The pressure inside the tank decline of tank 1 is unobvious, indicates that flame is smaller, and prediction scheme content is to send team on duty, is carried out using fire extinguisher
Manual extinguishing puts out initial stage fire behavior, if making good progress, after fire extinguishment, monitors that tank surface temperature drops to preset value
Hereinafter, prediction scheme releases.
It is opposite, if one fire behavior prediction scheme table of air accumulator, 301 grade be for the moment, team on duty go on the road of fire extinguishing or
When putting out a fire, prediction scheme tracing subsystem 402 monitors the downward trend that the pressure inside the tank of air accumulator 1 is gradually accelerated, and leads
Causing the pressure loss is more than preset value, meets prediction scheme promotion condition, and prediction scheme table grade upgrades to second level at this time, at this point, prompt accident
Operator on duty is disposed, fire extinguishing squad on duty should be recalled rapidly, need to carry out fire extinguishing disposition using fire fighting truck.Meanwhile this implementation
For example by the calculating of associated variable, the temperature of discovery 5 102 region of exhaust pipe is more than given threshold, i.e. exhaust pipe 5 102
It is located in one 101 fire behavior region of air accumulator afterwards, causes exhaust pipe 5 102 by high temperature.High temperature keeps 5 102 side shape of exhaust pipe concurrent
Raw leakage, thus by association triggering, so that exhaust pipe five leaks prediction scheme table 302 and is triggered, accident handling operator on duty is prompted,
The input valve for closing exhaust pipe 5 102 should be operated, while fire fighting truck being notified to pay attention to when situation allows, to exhaust pipe five
102 are put out a fire or are cooled down.If fire fighting truck is put out a fire successfully, exhaust pipe 5 102 has also carried out cooling processing, then is monitoring tank
When body surface face temperature drops to preset value or less, prediction scheme is released.
Opposite, if prediction scheme tracing subsystem 402 finds the gas in air accumulator 1 in fire fighting truck fire extinguishing procedure
Pressure is in rapid decrease trend, then prediction scheme table grade is upgraded to three-level, it is desirable that plant area's near zone stops production, and reports higher level portion
Door or government department prompt accident handling operator on duty, site personnel should be notified to evacuate.Fire fighting truck should be noted that the observation intensity of a fire,
If fire extinguishing effect can not be obtained, fire fighting truck should be moved to the position with one 101 distance of air accumulator for safe distance.And it requests
Higher level sends larger fire-extinguishing apparatus to be supported.
As shown in fig. 6, when the present embodiment meets with toxic but non-flammable the gas of the gas again leakage stored in air accumulator 4 103
When, in calm situation, the operation of the present embodiment and the guidance to accident specifically:
The position of air accumulator 4 103 is in North, and vertical span is Stall to three buildings, and 4 103 top plug hatch of air accumulator occurs
Leakage, triggering air accumulator four leak prediction scheme table 303, and prediction scheme table grade is level-one, prompt accident handling operator on duty, close upstream
After valve, disposition squad on duty is sent to be handled, disposition squad carries out gas precautions.By preceding method, danger can determine
The airflow channel of gas, i.e. leakage path, for through the plant area channel in southwest and northeastward, gas flow is divided into two sides
To respectively southwestward and northeastward, gas flow are the half of leakage rate.Prediction scheme tracing subsystem 402 passes through pass
Joining variable to obtain the hazardous gas concentration of three region of office is more than threshold value, and triggering office three leaks prediction scheme table 304, thing
Therefore disposition operator on duty should notify the personnel in office three to withdraw.
When the pressure inside the tank of air accumulator 4 103 declines rapidly, prediction scheme table grade upgrades to second level, indicates tank body leakage mouth
Larger, it is big to repair difficulty, should carry out evacuating personnel and gas absorb neutralize it is innoxious after, then carry out the reparation of tank body.At this point,
It prompts accident handling operator on duty to evacuate personnel nearby, withdraws disposition squad, lay equal stress on and disposition squad is newly sent to reach leakage path
Appropriate location, progress adsorption solvent or foam shed work.Accident handling operator on duty notifies the personnel in office three vertical
Office is withdrawn, and is withdrawing the gas precautions taken can take on the way.And by accident handling operator on duty or system
Automatically upper-level leader part or government part are reported, request disposition is supported.
Embodiment two:
The present embodiment has carried out further improvement to embodiment one.It can be provided for accident handling operator on duty perspective pre-
The function of measured data can make accident handling operator on duty preferably arrange the disposition of accident, in more effective reduction accident
Casualties.
In the present embodiment, prediction scheme table further includes deducing time T and extension associated variable, when there are safety accident, prediction scheme
Tracing subsystem 402 deduces the grade of prediction scheme table and the value of associated variable after T time with real-time monitoring data, after T time
Value of the value of associated variable as extension associated variable.As shown in table 1, in the present embodiment, the fire behavior prediction scheme table of air accumulator 1
Deducing time T is 10 minutes.I.e. air accumulator 1 occur fire behavior after, prediction scheme tracing subsystem 402 can derive ten minutes later remaining
The value of the associated variable of prediction scheme table provides perspective reference data for accident handling.
When this embodiment scheme meets with air accumulator 4 103 and leaks, by the pressure inside the tank of air accumulator 4 103, push away
Disconnected leakage total amount is inferred to leak range, in a bit of time according to the aerial saturated concentration of hazardous gas, so that it may
The rate of gas Release and dispersion is inferred to, thus when leakage occurs 1~2 minute, so that it may calculate after ten minutes, gas is let out
Leak covered region.If calculating gained after ten minutes, gas leakage overlay area is not covered with three region of office,
Then when leakage occurs 1~2 minute, it will be able to notify the personnel in office three that there is at least eight minutes departure times, keep away
Exempt from the personnel in office three to occur in a hurry, to lead to the loss that should not occur.Remaining content of the present embodiment is the same as embodiment one.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (10)
1. a kind of chemical plant safety on line supervisory systems, which is characterized in that
Include:
Data capture unit is communicated with the DCS in chemical plant, obtains the monitoring data in chemical plant and storage；
Prediction scheme table subsystem, editor and storage prediction scheme table；
Prediction scheme triggers subsystem, for analyzing chemical plant monitoring data in real time, judges whether there is prediction scheme and is triggered, if there is prediction scheme
It is triggered, then recalls corresponding prediction scheme table, connect with data capture unit and prediction scheme table subsystem；
Prediction scheme tracing subsystem, when there is safety accident, periodicity analysis monitoring data dynamically updates the prediction scheme being triggered
Table is connect with data capture unit, prediction scheme table subsystem and prediction scheme triggering subsystem；
Display subsystem triggers subsystem with prediction scheme and prediction scheme tracing subsystem is connect for showing the prediction scheme table being triggered.
2. a kind of chemical plant safety on line supervisory systems according to claim 1, which is characterized in that
The prediction scheme table subsystem includes prediction scheme table edit cell and prediction scheme table storage unit, and the prediction scheme table includes prediction scheme object
Information, trigger condition, grade, promotion condition, classification prediction scheme content and condition subsequent, the prediction scheme object information includes object name
Title, object type and subject area, trigger condition are the condition that monitoring data need to meet when triggering prediction scheme, and promotion condition is pre-
The condition that monitoring data need to meet when case upgrades, condition subsequent is the condition that monitoring data need to meet when prediction scheme releases, described etc.
Grade expression incident classification is simultaneously corresponding with classification prediction scheme content；Prediction scheme trigger subsystem periodic reading monitoring data and with prediction scheme table
Trigger condition comparison, if monitoring data meets trigger condition, triggers corresponding prediction scheme table.
3. a kind of chemical plant safety on line supervisory systems according to claim 2, which is characterized in that
The prediction scheme table further includes associated variable, and associated variable includes temperature, wind direction, wind speed, the danger of prediction scheme object region
Dangerous gaseous species and hazardous gas concentration.
4. a kind of chemical plant safety on line supervisory systems according to claim 3, which is characterized in that
When there is the prediction scheme table being triggered, prediction scheme tracing subsystem executes following steps:
A11) safety accident if it exists includes fire behavior, then derives and update the temperature value of the associated variable of each prediction scheme table, if
Existing safety accident includes hazardous gas spillage, then the hazardous gas for deriving and updating the associated variable of each prediction scheme table is dense
It spends, the hazardous gas type in associated variable is corresponding leakage type；
A12) show that the prediction scheme being triggered and associated variable change several maximum prediction schemes by display subsystem；
A13 monitoring data) is read, is upgraded prediction scheme if meeting prediction scheme promotion condition, if meeting condition subsequent for prediction scheme solution
It removes；
A14 step A11 to A13) is repeated, until prediction scheme releases or manually close prediction scheme.
5. a kind of chemical plant safety on line supervisory systems according to claim 4, which is characterized in that
The prediction scheme table further includes association trigger condition, and prediction scheme triggers the associated variable of subsystem periodic reading prediction scheme table
Value, and corresponding prediction scheme table is triggered if the value of associated variable, which meets, is associated with trigger condition with trigger condition comparison is associated with.
6. a kind of chemical plant safety on line supervisory systems according to claim 3, which is characterized in that
When there is the prediction scheme table being triggered, prediction scheme tracing subsystem executes following steps:
A21) safety accident if it exists includes fire behavior, then derives and update the temperature value of the associated variable of each prediction scheme table, and
The temperature value for deriving the associated variable of each prediction scheme table after T time, as the temperature prediction value of associated variable, safety if it exists
Accident includes hazardous gas spillage, then derives and update the hazardous gas concentration of the associated variable of each prediction scheme table, and derive and
The hazardous gas concentration of the associated variable of each prediction scheme table, the hazardous gas concentration prediction as associated variable after display T time
It is worth, the hazardous gas type in associated variable is corresponding leakage type；
A22) show that the prediction scheme being triggered and associated variable change several maximum prediction schemes by display subsystem；
A23 monitoring data) is read, is upgraded prediction scheme if meeting prediction scheme promotion condition, if meeting condition subsequent for prediction scheme solution
It removes；
A24 step A21 to A23) is repeated, until prediction scheme releases or manually close prediction scheme.
7. a kind of chemical plant safety on line supervisory systems according to claim 6, which is characterized in that
When there are prediction scheme upgrading, T extends.
8. a kind of chemical plant safety on line supervisory systems according to claim 6 or 7, which is characterized in that
The prediction scheme table further includes association trigger condition, and prediction scheme triggers the associated variable of subsystem periodic reading prediction scheme table
Value, and corresponding prediction scheme table is triggered if the value of associated variable, which meets, is associated with trigger condition with trigger condition comparison is associated with；
Prediction scheme triggering subsystem periodic reading prediction scheme tracing subsystem is resulting, the temperature prediction of the associated variable of prediction scheme table
Value, hazardous gas concentration prediction value and hazardous gas type, if temperature prediction value, hazardous gas concentration prediction value and danger
Gaseous species meet association trigger condition, then trigger corresponding prediction scheme table, and mark triggers approach is prediction triggering.
9. a kind of chemical plant safety on line supervisory systems according to claim 4 or 6, which is characterized in that
The method for deriving the temperature value of the associated variable of each prediction scheme table are as follows:
If the prediction scheme object of prediction scheme table is greater than setting threshold with the isolation of the airflow channel in fire behavior region or the gas-flow resistance of airflow channel
Value, then the temperature value of the associated variable of prediction scheme table remains unchanged；
If the prediction scheme object of prediction scheme table and the airflow channel resistance in fire behavior region are less than or equal to given threshold, judge that air-flow is logical
Whether road region is calm, if calm, the temperature value of the associated variable of prediction scheme table is obtained by air thermal conductivity law, if air-flow is logical
There is wind in road region, then judge the prediction scheme object of prediction scheme table whether in lower air port, if in lower air port, away from fire behavior time of origin t≤
Ds/vwWhen interior, the temperature value of the associated variable of prediction scheme table is obtained by air heat conduction model, wherein DsFor prediction scheme subject area with
The shortest distance in fire behavior region, vwFor wind speed, away from fire behavior time of origin t > Ds/vwWhen interior, the temperature of the associated variable of prediction scheme table
Value is Cm, Cm=β Ct, β ∈ [0.6,1]
CtFor the temperature value at the edge in fire behavior region, β is regulation coefficient, and prediction scheme subject area and fire behavior region distance are smaller, or pre-
The airflow channel resistance in case subject area and fire behavior region is got over hour, and β takes greater value, if the prediction scheme object of prediction scheme table is in the wind
Mouthful, then the temperature value of the associated variable of prediction scheme table is obtained by air thermal conductivity law.
10. a kind of chemical plant safety on line supervisory systems according to claim 4 or 6, which is characterized in that
The method for deriving the hazardous gas concentration of the associated variable of each prediction scheme table are as follows:
If the prediction scheme object of prediction scheme table and the airflow channel isolation or the gas-flow resistance of airflow channel in hazardous gas spillage region are big
In given threshold, then the hazardous gas concentration of the associated variable of prediction scheme table remains unchanged；
If the prediction scheme object of prediction scheme table and the airflow channel resistance in hazardous gas spillage region are less than or equal to given threshold, with
Eight orientation are evenly dividing centered on source of leaks in the horizontal direction, upper and lower two orientation are vertically divided, according to chemical plant
Workshop layout, hazardous gas density, wind direction and wind speed, judge hazardous gas in the flow proportional δ in 16 orientationr, r ∈
[1,16], then the hazardous gas concentration Q of the associated variable of prediction scheme tabley=δuQ, wherein δuIndicate the prediction scheme target area of prediction scheme table
In the orientation of source of leaks, Q is the hazardous gas concentration at source of leaks in domain；
Flow proportional δ of the hazardous gas in 16 orientationrMethod are as follows:
It determines the flow-rate ratio of horizontal direction: being laid out according to the workshop in chemical plant, select some airflow channel as reference channel, into
And determine the resistance ratios of the airflow channel resistance with respect to reference channel in remaining horizontal seven orientation, if some direction airless is logical
Road, then airflow channel resistance ratios are infinity, using the inverse of the resistance ratios in each direction as weight, if leakage region has wind,
Several orientation of wind direction are then descended to determine flow proportional by weight distribution, remaining orientation flow proportional is 0, if leaking area is calm,
Then eight orientation in horizontal direction determine flow proportional by weight distribution；
Determine the flow-rate ratio of vertical direction: the gas if hazardous gas is attached most importance to, the flow proportional of upper position are 0, eight of lower orientation
The flow proportional in direction is equal to flow proportional determined by horizontal direction, if hazardous gas density is suitable with air, upper and lower
The flow proportional of position is respectively equal to the half of flow proportional determined by horizontal direction, if hazardous gas density is close less than air
Degree, then descending the flow proportional in orientation is 0, and the flow proportional in eight directions of upper position is equal to flow-rate ratio determined by horizontal direction
Example.
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