CN105543443B - A method of being used for coal gas of converter pressuring machine antisurge control system - Google Patents
A method of being used for coal gas of converter pressuring machine antisurge control system Download PDFInfo
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- CN105543443B CN105543443B CN201511003424.4A CN201511003424A CN105543443B CN 105543443 B CN105543443 B CN 105543443B CN 201511003424 A CN201511003424 A CN 201511003424A CN 105543443 B CN105543443 B CN 105543443B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
Abstract
The present invention provides a kind of coal gas of converter pressuring machine antisurge control system and methods, wherein：Coal gas of converter pressuring machine antisurge control system include electric control gear control converter gas cabinet ontology, electric precipitator be connected to by Pressure Unit enter, exit butterfly valve group, further include return valve, pressure transmitter and gas flow meter, it is characterised in that：Producer gas cabinet ontology has coal gas of converter entrance and reflux inlet and gas exit；Pressure Unit includes inlet, outlet end, and inlet end is connected to entrance butterfly valve group through pipeline, and outlet side is connected to exit butterfly valve group through pipeline；Electric precipitator is connected to by pipeline between gas exit and entrance butterfly valve group；And pressure transmitter, gas flow meter are sequentially located on the pipeline of connection exit butterfly valve group outlet, return valve one end is connected to by pipeline on the pipeline between exit butterfly valve group and pressure transmitter simultaneously, the other end is connected to reflux inlet through pipeline, by previous constructions, it solves the technical issues of Anti-surge Control, has reached the good result for improving operational efficiency, reducing energy consumption, stablizing ductwork pressure.
Description
Technical field
The present invention relates to the technical fields of converter gas cabinet system, espespecially provide a kind of for coal gas of converter pressuring machine anti-asthma
The method of isolation control system.
Background technology
The recycling of coal gas of converter is industry energy conservation consumption reduction, and the important measures improved benefit advantageously reduce simultaneously
Pollution improves environment.Gas pressure is only 3kPa or so in converter gas cabinet, is unable to reach the pressure of each production user of enterprise
It is required that, it is therefore desirable to it is pressurizeed to coal gas by pressuring machine.In pressure process, when small flow is run, impeller and diffuser
Gas in runner will generate vortex, the formation and disappearance of vortex, logical phenomenon when stifled when making the formation of liquid wheel runner, cause air-flow and
Blade generates the vibration of frequency, so that generating serious periodic vibration and roar in machine, this phenomenon is referred to as to centrifuge
" surge " of formula compressor.Blade judder is caused due to the strong pulsation of air-flow and periodic swinging, makes impeller stress
It greatly increases, noise aggravation makes entire unit that judder occur, and may damage bearing, sealing, in turn results in parking or tight
The accident of weight.Surge is the distinctive unsteady operating conditions of pressuring machine, surge seriously limit wind turbine stable operation range and
Operational efficiency, surge once occur, it will cause prodigious damage to wind turbine.Therefore, Anti-surge Control is pressuring machine control system
Indispensable function in system.
Anti-surge Control can also influence the operational efficiency of pressuring machine, Anti-surge Control not only concerning the safety of wind pressuring machine
Optimization be also the energy-efficient important link of pressuring machine.How the generation of surge is effectively prevent under the premise of meeting technological requirement,
The operational efficiency for improving pressuring machine as far as possible simultaneously, is always the difficult point of control system.Traditional Anti-surge Control mode is to set
Method is when pipe network flow is too low or when hypertonia by reducing the resistance of pipe network, that is, the method increasing of adjusting return valve
Add flow, so that the operating point of wind turbine is maintained at the lower right of surge line, without entering surge area.Although this anti-surge strategy peace
Overall coefficient is high, is to sacrifice fan operation range and effectiveness of performance as cost.Its particular problem is mainly shown as：
One, gas compressor is during specific design and produce, in order to avoid surge its fan-out capability always there are than
Larger surplus, these extra coal gas will flow back to gas chamber, to considerably increase equipment energy consumption, reduce operation effect
Rate.
Two, frequency conversion pressuring machine interferes with each other the adjusting of pressuring machine outlet pressure with return valve, and there are serious couplings
Conjunction relationship cannot achieve while adjust.
Three, when surge occurs, return valve can not be opened quickly.And after jumping out surge area, overshoot is easy tod produce, is needed
It to be adjusted manually according to artificial experience.
Invention content
In order to solve the above technical problems, the main purpose of the present invention is to provide a kind of coal gas of converter pressuring machine anti-surge controls
System and method processed.
To reach above-mentioned purpose, the technical solution that the present invention applies is：A kind of coal gas of converter pressuring machine anti-surge control is provided
System processed, including electric control gear control converter gas cabinet ontology, electric precipitator be connected to by Pressure Unit enter, export butterfly
Valve group, further includes return valve, pressure transmitter and gas flow meter, wherein：Producer gas cabinet ontology enters with coal gas of converter
Mouth and reflux inlet and gas exit；Pressure Unit includes inlet, outlet end, and inlet end is connected to entrance butterfly valve group through pipeline, goes out
Gas end is connected to exit butterfly valve group through pipeline；Electric precipitator is connected to by pipeline between gas exit and entrance butterfly valve group；And it presses
Power transmitter, gas flow meter are sequentially located on the pipeline of connection exit butterfly valve group outlet, while return valve one end passes through
On pipeline between exit butterfly valve group and pressure transmitter, the other end is connected to reflux inlet through pipeline for pipeline connection.
In the present embodiment preferably：Pressure Unit includes first to fourth pressuring machine, and entrance butterfly valve group includes first to the
Four entrance butterfly valves and exit butterfly valve group include first to fourth exit butterfly valve, wherein：First to fourth pressuring machine inlet end point
Not through pipeline be connected to first to fourth entrance butterfly valve, and first to fourth pressuring machine outlet side then respectively through pipeline connection first to
4th exit butterfly valve.
In the present embodiment preferably：Pipeline between electric precipitator and entrance butterfly valve group is logical four pipelines, wherein：One is logical
Four pipelines include an entrance and four outlets, and electric precipitator outlet is connected to by pipeline with an entrance, and four outlets pass through pipe respectively
Road is connected to first to fourth entrance butterfly valve；Pipeline between exit butterfly valve group and pressure transmitter is one pipeline of four-way, wherein：
One pipeline of four-way includes four entrances and an outlet, and four entrances are connected by the outlet of pipeline and first to fourth exit butterfly valve respectively
It is logical, and an outlet is then connected to external agency by pipeline.
To reach above-mentioned purpose, the technical solution that the present invention applies is：A kind of coal gas of converter pressuring machine anti-surge control is provided
The method of system processed, including pressuring machine frequency conversion pressure control loop and return valve flow control circuit, wherein：Pressuring machine goes out
The pressure set points of mouth are manually set according to manufacturing technique requirent by process engineer, according to the pressure set points of outlet and inspection
The deviation of measured value controls pressuring machine frequency converter by PID controller, to pass through the adjustment realization to pressuring machine rotating speed
Stability contorting is carried out to the pressure of outlet.Pressuring machine rotating speed is too low in order to prevent simultaneously, is limited the output of PID controller
Width controls.When pressuring machine rotating speed reaches lower rotation speed limit, pressuring machine outlet pressure does not meet technological requirement yet, then the control loop
Control object switch to return valve, control pressuring machine outlet pressure by adjusting return valve at this time；Reflux is adjusted
Valve flow control circuit includes establishing the mathematical model of surge alarm line and pressuring machine rate of discharge is corresponding with surge alarm line
Flow between deviation be implemented in combination with Anti-surge Control as controlled variable and by PID control and rule control is become.
In the present embodiment preferably：The mathematical model for establishing surge alarm line is established between pressuring machine operating point and pumping point
The math equation of distance comprising the mathematical equation of the mathematical equation of the high alarming line of surge and the high alarming line of surge.
In the present embodiment preferably：Anti-surge control method includes：
One, to calculate the high alarming line of surge under pressuring machine current rotating speed according to the mathematical model of surge alarm line corresponding
Flow and the corresponding flow of the high alarming line of surge；
Two, when pressuring machine rate of discharge detected value is less than the corresponding flow of the high alarming line of surge, return valve is allowed
It is opened into corresponding aperture under electric control gear control, pressuring machine rate of discharge is made to be more than the corresponding flow of the high alarming line of anti-surge,
Thereby surge area is quickly left in upper pressuring machine operating point；
Three, when pressuring machine rate of discharge detected value flow corresponding more than the high alarming line of surge, by surge alarm line
Corresponding flow as flow control circuit setting value, pressuring machine rate of discharge detected value flow corresponding with surge alarm line it
Between deviation automatically adjust return valve as controlled volume；
Four, when pressuring machine rotating speed is that lower limit and outlet pressure do not meet setting value, control loop is turned by flow control circuit
For pressure control loop, pressuring machine outlet pressure is thereby controlled by return valve.
In the present embodiment preferably：Return valve running speed is determined by the proportional gain of PID controller.
In the present embodiment preferably：PID controller with it is asymmetrical open soon, slowly close form control return valve running.
Compared with prior art, the present invention it has the advantages that：The operational efficiency of pressuring machine is improved, reduces energy consumption, surely
Determine ductwork pressure, stable, reliable coal gas of converter is improved for each production user.
Description of the drawings
Fig. 1 is converter gas cabinet system flow chart, which includes gas chamber ontology facility, electric precipitator, coal gas of converter
The equipment such as pressurizing point, wherein 4 pressuring machines use frequency conversion control technique, dual-purpose two is standby.The system can will be in steelmaking process
The coal gas of converter that interruption generates stores, and each user of uniform and stable supply uses after dedusting, pressurization.Converter in Fig. 1
Gas chamber ontology 1, electric precipitator 2, pressuring machine entrance butterfly valve 3,6,9,12, pressuring machine exit butterfly valve 4,7,10,13, pressuring machine 5,
8,11,14, return valve 15, pressure transmitter 16, gas flow meter 17.
Fig. 2 pressuring machine rating curve figures.
Fig. 3 is pipe network air way characteristic curve and pressuring machine rating curve intersection point variation diagram.
Fig. 4 pressuring machine anti-surge control theory figures.
Specific implementation mode
With reference to specific embodiment and attached drawing, invention is further described in detail.It is described below in detail the present invention's
Embodiment, examples of the embodiments are shown in the accompanying drawings, and in which the same or similar labels are throughly indicated identical or classes
As element or element with the same or similar functions.The embodiments described below with reference to the accompanying drawings are exemplary, only
Technical solution for explaining the present invention, and it is not construed as limitation of the present invention.
In the description of the present invention, the fingers such as term "inner", "outside", " longitudinal direction ", " transverse direction ", "upper", "lower", "top", "bottom"
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention rather than
It is required that the present invention must be with specific azimuth configuration and operation, therefore it is not construed as limitation of the present invention.
As shown in Fig. 2, in pressuring machine system, pressuring machine is under certain suction condition and rotating speed, the boosting Δ P of pressuring machine
The friendshipization with air quantity Q variations, and the curve for describing both sides relation is just called pressuring machine rating curve, has one under each rotating speed
Bar P-Q lines, different rotating speeds obtain one group of convex line, are called pressuring machine rating curve group, which is that pressuring machine producer passes through
Fitting experimental data forms.Usual pressuring machine rating curve is research pressuring machine running operating point, implements Anti-surge Control
Basis and foundation.The various pipelines being connected with pressuring machine are collectively referred to as pipe network system with container.When gas passes through pipe network system
When, certain pressure is needed to overcome resistance, and the gas flow by pipe network and the pressure needed for pipe network under this flow are described
Between relation curve be called pipe network air way characteristic curve, pipe network air way characteristic curve generally can be expressed as Δ P=a+RQ2
Wherein, a is constant, and R is resistance coefficient, and Q is pipe network flow.It also can be seen from the characteristic curve of Fig. 2, pressuring machine
Under certain rotating speed, if boosting is increased to a certain critical pressure, the operating point of pressuring machine is K points, then pressuring machine will enter asthma
Shake area, down draught and periodic swinging phenomenon occurs, this critical point is pumping point, corresponding flow Qk pumping point pressuring machines
Rate of discharge.Pumping point under different rotating speeds on characteristic curve is connected the surge line for just having obtained pressuring machine.
As shown in figure 3, the operating point of pressuring machine is exactly the friendship of pressuring machine rating curve and pipe network air way characteristic curve
Point.On operating point, the rate of discharge of pressuring machine is exactly the inlet flow rate of pipe network system, and the outlet pressure of pressuring machine is exactly pipe network
The inlet pressure of system.Therefore the change of pipe network air way characteristic curve will lead to the variation of pressuring machine operating point.Certain moment wind turbine
Rotating speed be n1, the resistance coefficient of pipe network system is R1, and the operating point of pressuring machine is A points at this time；It is special when resistance of pipe system increase
Linearity curve becomes R2, and pipe network air way characteristic curve and the intersection point of pressuring machine rating curve become for B points, i.e. pressuring machine at this time
Machine system will stabilise at the operation of operating point B points.In conjunction with Fig. 2 it is found that in the timing of rotating speed one, the air quantity of pressuring machine with boost at anti-
Than with the raising of pressure, air quantity reduces.In addition, with the raising of pressuring machine rotating speed, pressuring machine outlet air quantity and boosting carry
Height, therefore control pressuring machine flow and pressure can be regarded as using rotating speed.From the above, it is pressed to ensure that pressuring machine exports
The stabilization of power needs the rotating speed for reducing pressuring machine to n2 at this time, while the resistance coefficient of pipe network system becomes R3, then the work of pressuring machine
Condition point will move in figure at C points, and outlet pressure is consistent with A points.
Pressuring machine surge in order to prevent has been set for research, the control to control system to surge line minimum discharge
Strategy has carried out detailed analysis, proposes a set of effective pressuring machine integrated control strategy, Anti-surge Control validity and
Good effect is obtained in terms of economy.It is illustrated in figure 4 pressuring machine anti-surge control theory figure, it is controlled back including two
Road.
One, pressuring machine frequency conversion pressure control loop
The pressure set points of pressuring machine outlet are manually set according to manufacturing technique requirent by process engineer, according to outlet
Pressure set points and detected value deviation, pressuring machine frequency converter is controlled by PID controller, to by pressurization
The adjustment of machine rotating speed is realized carries out stability contorting to the pressure of outlet.Pressuring machine rotating speed is too low in order to prevent simultaneously, to PID control
The output of device has carried out amplitude limit control, is set to pressuring machine lower rotation speed limit.When pressuring machine rotating speed reaches lower rotation speed limit, add
Press outlet pressure does not meet technological requirement yet, then the control object of the control loop switchs to return valve, passes through tune at this time
Return valve is saved to control pressuring machine outlet pressure.
Two, return valve flow control circuit
1, the mathematical model of surge alarm line is established
According to the pressuring machine rating curve that producer provides, determine that pressuring machine pumping point institute under power frequency working condition is right
The pressuring machine outlet stream magnitude Qk answered, it is directly proportional to rotating speed for same typhoon fan delivery according to wind turbine lawIn
Being can be with the pressuring machine outlet stream magnitude Qk corresponding to pumping point of the reasoning and calculation under different frequency working condition.According to difference
Pressuring machine outlet stream magnitude corresponding to pumping point under frequency working condition, we can draw a pressuring machine stall margin
Line, as shown in Fig. 2, the high alarming line of surge that one safety allowance is 3% is set on the right of surge boundary line, meanwhile,
The high alarming line of surge that a safety allowance is 5% is arranged in the right of surge boundary line again.It can be established and be added according to principles above
The math equation of distance between press operation point and pumping point, that is, surge alarm line mathematical model.
The math equation of the high alarming line of surge：
The math equation of the high alarming line of surge：
Q in above formulanWhen for pressuring machine rotating speed being n, the corresponding pressuring machine rate of discharge of pumping point
QWorkIt is pressuring machine in power frequency rotating speed, the corresponding pressuring machine rate of discharge of pumping point
fnFrequency when for pressuring machine rotating speed being n
fWorkFor frequency of the pressuring machine in power frequency rotating speed
2, using the deviation between pressuring machine rate of discharge and the corresponding flow of surge alarm line as controlled variable, will become
PID control is implemented in combination with Anti-surge Control with rule control.
The first step calculates the high alarming line pair of surge under pressuring machine current rotating speed according to the mathematical model of surge alarm line
The flow answered and the corresponding flow of the high alarming line of surge.
Second step judges when pressuring machine rate of discharge detected value flow corresponding less than the high alarming line of surge, explanation
Under extreme operating condition, closed-loop control cannot avoid the overshoot of pressuring machine operating point to cross surge line completely, it is necessary to use open loop control
System assists closed-loop control to prevent the generation of pressuring machine surge, we use rule control, directly quickly open return valve and arrive
Certain aperture makes pressuring machine rate of discharge be more than the corresponding flow of the high alarming line of anti-surge, pressuring machine operating point is made to be rapidly directed away from
Surge area.
Third walks, and judges, when pressuring machine rate of discharge detected value flow corresponding more than the high alarming line of surge, to use
Become PID control, that is, using the corresponding flow of surge alarm line as flow control circuit setting value, the inspection of pressuring machine rate of discharge
Deviation between measured value and the corresponding flow of surge alarm line automatically adjusts return valve as controlled volume.Anti-surge flows back
The movement speed of regulating valve is mainly determined by the proportional gain of PID controller, in debugging process, such as scaling up gain,
Return valve action when open too fast, it is excessive certainly will will produce larger flow and pressure oscillation, such as reduce ratio increase
Benefit, return valve are opened excessively slow in action, and cannot be guaranteed to ensure pressuring machine faster in operating point rising
Do not enter surge area.Based on the above reason, we are changed down pass and are controlled the action of return valve soon using asymmetrical control.
When pressuring machine is in the safety zone operation of the lower right side of the high alarming line of surge, the proportional gain of PID controller is smaller, when integral
Between it is larger, controller makes return valve be in full off state.When pressuring machine operating point once approaching or having surmounted surge height report
The proportional gain of alert line, PID controller increases, and the time of integration reduces, and more more than the high alarming line of surge, and proportional gain is got over
Greatly, the time of integration is smaller, and response speed is accelerated, and which achieves opening soon for return valve.Pacify when pressuring machine operating point returns
When the whole district, deviation reduces, and proportional gain reduces, and the time of integration increases, and response speed is slack-off, realizes the slow of return valve
It closes.The anti-surge control method by control with changed scale gain with become the time of integration be combined, change simultaneously controller proportional gain and
The time of integration had not only ensured that return valve action had preferable rapidity when pressuring machine operating point crosses surge high alarming line, but also
The stability that ensure that operating point system adjustment in alarming line high close to surge has been taken into account the rapidity of Regulation against surge and has been added
The stability of press outlet pressure, pressuring machine operating point are accurately controlled along the high alarming line of surge, and automatic " nail " alarms in surge height
Without manual operation return valve on line.Surge area can be entered to avoid pressuring machine in this way, while making pressuring machine permanent worker
Make near optimal working point, improves the production efficiency of pressuring machine.In addition, reflux valve opening is excessive in order to prevent, PID is controlled
The output of device processed has carried out amplitude limit control.
4th step, when pressuring machine rotating speed reaches lower rotation speed limit, pressuring machine outlet pressure does not meet technological requirement yet, then should
Control loop switchs to pressure control loop by flow control circuit, and pressuring machine outlet pressure is controlled by return valve.
The variable frequency adjustment circuit of pressuring machine is pressuring machine outlet pressure regulating loop, and setting value is the pipe network of technological requirement
Pressure.The regulating loop of return valve is that pressuring machine exports gas flow regulating valve, and setting value is the high alarming line pair of surge
The flow value answered.When pressuring machine rate of discharge decreases below the flow value of the high alarming line of anti-surge, return valve starts
Automatic adjustment is quickly opened, and ensures pressuring machine operating point in the safety zone near the high alarming line of surge.When pressuring machine outlet stream
When amount increases to flow value corresponding more than the high alarming line of anti-surge, return valve starts slowly to close automatically, and it is invalid to avoid
Reflux improves pressuring machine production efficiency.Pass through two above pressure and flow circuit, the pressuring machine outlet pressure and flow of realization
Decoupling control both stabilizes outlet pressure, also stabilizes rate of discharge, while avoiding the surge phenomenon of pressuring machine, makes pressurization
Captain is operated near best operating point the phase.
Claims (4)
1. a kind of method for coal gas of converter pressuring machine antisurge control system, including pressuring machine frequency conversion pressure control loop and
Return valve flow control circuit, the control system include the converter gas cabinet ontology of electric control gear control, electric precipitator
Be connected to by Pressure Unit enter, exit butterfly valve group, further include return valve, pressure transmitter and gas flow meter, stove
Gas chamber ontology has coal gas of converter entrance and reflux inlet and gas exit；Pressure Unit includes inlet, outlet end, inlet end
It is connected to entrance butterfly valve group through pipeline, outlet side is connected to exit butterfly valve group through pipeline；Electric precipitator is connected to go out in coal gas by pipeline
Between mouth and entrance butterfly valve group；And pressure transmitter, gas flow meter are sequentially located on the pipeline of connection exit butterfly valve group outlet,
Return valve one end is connected to by pipeline on the pipeline between exit butterfly valve group and pressure transmitter simultaneously, and the other end is through pipe
Road is connected to reflux inlet；It is characterized in that：In pressuring machine frequency conversion pressure control loop, the pressure set points of pressuring machine outlet are
It is manually set according to manufacturing technique requirent by process engineer, according to the deviation of the pressure set points of outlet and detected value, is passed through
PID controller controls pressuring machine frequency converter, to by the adjustment of pressuring machine rotating speed realize to the pressure of outlet into
Row stability contorting；Pressuring machine rotating speed is too low in order to prevent simultaneously, and amplitude limit control has been carried out to the output of PID controller；Work as pressurization
When machine rotating speed reaches lower rotation speed limit, pressuring machine outlet pressure does not meet technological requirement yet, then the control object of the control loop turns
For return valve, pressuring machine outlet pressure is controlled by adjusting return valve at this time；Return valve flow control is returned
Road includes establishing the mathematical model of surge alarm line and between pressuring machine rate of discharge flow corresponding with surge alarm line
Deviation is implemented in combination with Anti-surge Control as controlled variable and by PID control is become with rule control；Establish the number of surge alarm line
It is the math equation for establishing distance between pressuring machine operating point and pumping point to learn model comprising the math equation of the high alarming line of surge
The mathematical equation of formula and the high alarming line of surge；
The mathematical model for establishing surge alarm line is specially：The pressuring machine rating curve first provided according to producer, really
Pressuring machine outlet stream magnitude Qk of the pressuring machine under power frequency working condition corresponding to pumping point is determined, according to wind turbine law, for same
One typhoon fan delivery is directly proportional to rotating speedThen pumping point that can be with reasoning and calculation under different frequency working condition
Corresponding pressuring machine outlet stream magnitude Qk；Secondly, according to the pressuring machine corresponding to the pumping point under different frequency working condition
The high alarming line of surge that a safety allowance is 3% is arranged on the right of surge boundary line in outlet stream magnitude, meanwhile, it is breathing heavily
Shake boundary line the right be arranged again a safety allowance be 5% the high alarming line of surge；
Wherein,
The math equation of the high alarming line of surge：
The math equation of the high alarming line of surge：
Q in above formulanWhen for pressuring machine rotating speed being n, the corresponding pressuring machine rate of discharge of pumping point,
QWorkIt is pressuring machine in power frequency rotating speed, the corresponding pressuring machine rate of discharge of pumping point,
fnFrequency when for pressuring machine rotating speed being n,
fWorkFor frequency of the pressuring machine in power frequency rotating speed.
2. a kind of method for coal gas of converter pressuring machine antisurge control system as described in claim 1, it is characterised in that：
Anti-surge control method includes：
One, the corresponding flow of the high alarming line of surge under pressuring machine current rotating speed is calculated according to the mathematical model of surge alarm line
And the corresponding flow of the high alarming line of surge；
Two, when pressuring machine rate of discharge detected value flow corresponding less than the high alarming line of surge, allow return valve in electricity
It is quickly opened into corresponding aperture under control device control, pressuring machine rate of discharge is made to be more than the corresponding flow of the high alarming line of anti-surge,
Thereby surge area is quickly left in upper pressuring machine operating point；
Three, when pressuring machine rate of discharge detected value flow corresponding more than the high alarming line of surge, surge alarm line is corresponded to
Flow as flow control circuit setting value, between pressuring machine rate of discharge detected value flow corresponding with surge alarm line
Deviation automatically adjusts return valve as controlled volume；
Four, when pressuring machine rotating speed is that lower limit and outlet pressure do not meet setting value, control loop is switched to press by flow control circuit
Power control loop thereby controls pressuring machine outlet pressure by return valve.
3. a kind of method for coal gas of converter pressuring machine antisurge control system as claimed in claim 2, it is characterised in that：
Return valve running speed is determined by the proportional gain of PID controller.
4. a kind of method of coal gas of converter pressuring machine antisurge control system as claimed in claim 3, it is characterised in that：PID
Controller with it is asymmetrical open soon, slowly close form control return valve running.
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| CN106338930B (en) * | 2016-10-27 | 2019-08-30 | 中冶赛迪工程技术股份有限公司 | Iron and steel enterprise's gas pipe system and method based on dynamic analog |
| CN107338340A (en) * | 2017-03-01 | 2017-11-10 | 北京福生智源科技有限公司 | A kind of device and method for being used to prevent RECOVERY OF CONVERTER GAS blower fan surge |
| CN108708872B (en) * | 2018-04-26 | 2019-10-11 | 西安交通大学 | A kind of paired running turbocompressor control method and control system |
| CN111848455B (en) * | 2020-08-17 | 2023-05-30 | 万华化学集团股份有限公司 | Method for reducing chromaticity of isocyanate product and automatic control method for gas phase extraction flow of isocyanate rectifying tower |
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| CN104314668A (en) * | 2014-10-22 | 2015-01-28 | 哈尔滨工程大学 | Device and method for controlling surging prediction of sequential turbocharging system |
| CN104533820A (en) * | 2014-12-26 | 2015-04-22 | 沈阳鼓风机集团自动控制系统工程有限公司 | Anti surge control method and device |
| CN104632595A (en) * | 2014-12-31 | 2015-05-20 | 中冶南方工程技术有限公司 | Converter gas pressure machine outlet pressure control method |
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