CN208416637U - A kind of blast furnace TRT press control system - Google Patents
A kind of blast furnace TRT press control system Download PDFInfo
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- CN208416637U CN208416637U CN201820127727.XU CN201820127727U CN208416637U CN 208416637 U CN208416637 U CN 208416637U CN 201820127727 U CN201820127727 U CN 201820127727U CN 208416637 U CN208416637 U CN 208416637U
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- blast furnace
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Abstract
Press control system the utility model discloses a kind of blast furnace TRT, including blast furnace TRT, blast furnace TRT one end and blast furnace gas after dedusting connect, the other end passes through pipeline all the way and connect with generator, and another way and gaspipe network export connection.The utility model carries out reasonable simplify to blast furnace TRT system and handles, the major disturbances of blast furnace top pressure under nominal situation are introduced into system, the dynamic model of blast furnace top pressure under nominal situation is established, so that the research and analysis for subsequent blast furnace top pressure control algolithm lay the foundation.
Description
Technical field
The utility model belongs to energy and power engireering technical field, and in particular to one kind is based on Fuzzy Adaptive PID control
The blast furnace TRT of system presses control system.
Background technique
TRT (Blast Furnace Top Gas Pressure Recovery Turbine System), i.e. State of Blast Furnace
Top coal gas pressure recovery turbine for power generation device, traditional blast furnace TRT press primary and secondary circuit of control system are all made of classical PID control
Deficiency.The influence factor that blast furnace TRT presses stability of control system is more complicated, and for controlled process there are complexity, height is non-
Linearly, the features such as time-varying Hurst index, and there are certain lag for press adjusting of the stator blade to blast furnace.
It is adjustable to turbine to depend on greatly traditional PID realization for the press control of domestic industry blast furnace TRT system at present
The control mode of stator blade aperture regulation, but the control method is difficult to cope with the complicated blast furnace top pressure system of variation, control effect
It is poor.In addition the electro-hydraulic position servo control device of system subloop is to realize control using analog circuit, so that being used for this time
The control algolithm on road is unable to get improve and perfect, limits advanced optimizing for control system.With the large size of metallurgy high furnace
Change and the continuous development of Modern Ironmaking Process, traditional blast furnace top pressure higher and higher to the stability requirement of blast furnace top pressure control
Control system has been unable to satisfy the control requirement of modern blast furnace press stability.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide one kind to be based on
The blast furnace TRT of Fuzzy Adaptive PID Control presses control system, and it is equal to make up traditional blast furnace TRT press primary and secondary circuit of control system
The deficiency controlled using classical PID.
The utility model uses following technical scheme:
A kind of blast furnace TRT presses control system, including blast furnace TRT, blast furnace TRT one end and the blast furnace gas after dedusting connect
It connects, the other end passes through pipeline all the way and connect with generator, and another way and gaspipe network outlet connect.
Specifically, being provided with reaction vessel in blast furnace TRT, one end of reaction vessel is connect with fan inlet, another
First pressure container and piping connection are passed through in end.
Further, pipeline includes second pressure container, one end of second pressure container and the first pressure container of blast furnace
Connection, the other end are connect with Linear regulating valve.
Further, the first damping is provided in pipeline, one end of the first damping and the first pressure container of blast furnace connect,
The other end is connect with second pressure container.
Further, the second damping is provided in pipeline, one end of the second damping is connect with second pressure container, the other end
It is connect with turbine.
Specifically, Linear regulating valve is turbine.
Compared with prior art, the utility model at least has the advantages that
The utility model presses control system based on the blast furnace TRT of fuzzy adaptivecontroller, and blast furnace TRT device operates in just
When under normal operating condition, turbo-expander normal power generation, reducer unit and by-passing valve at this time is in close state, and entrance butterfly
Valve, entrance gate valve, exit butterfly valve, outlet gate valve and fast cut valve are then shown in a fully open operation, therefore can be ignored in system
Valve to the influence of blast furnace top pressure, one end of blast furnace TRT is connect with air blower admission line, the other end by pipeline with
Turbine connection, turbine are connect with gas exit, and the size of blast furnace top pressure is indeed through stator blade in turbine in system
Aperture adjusts to realize, and the opening value is equal or close to always a setting in the case where system normal operation
Blast furnace, according to the process flow of the above feature and blast furnace TRT, is reduced to the series model of reaction vessel and pressure vessel by value,
Pipeline is reduced to the series model of pressure vessel and upstream and downstream damping, and turbo-expander is reduced to a Linear regulating valve, finally
The simplified model system of blast furnace TRT system under obtained nominal situation carries out reasonable simplify to blast furnace TRT system and handles, will
The major disturbances (operation of blast furnace interval feeding) of blast furnace top pressure introduce model under nominal situation, establish high furnace roof under nominal situation
The dynamic model of pressure, so that the research and analysis for subsequent blast furnace top pressure control algolithm lay the foundation.
Further, the cleaner between blast furnace roof and turbine stator blade and pipeline are reduced to damping and pressure vessel
Series model, since pipeline is longer, therefore think that there are purely retardeds on pipeline.
Further, turbine normal power generation, the press of height top is by turbine stator blade aperture regulation, and stator blade aperture is relative to some
Stable operating point fluctuation, therefore turbine is reduced to Linear regulating valve, facilitate subsequent processing.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the utility model blast furnace TRT control system model schematic diagram；
Fig. 2 is blast furnace top pressure Control system architecture block diagram under nominal situation；
Fig. 3 is the utility model Fuzzy Self-adaptive PID structure chart.
Specific embodiment
The utility model provides a kind of blast furnace TRT press control system based on Fuzzy Adaptive PID Control, in conjunction with biography
The advantages of PID control of uniting is controlled with modern fuzzy, using Fuzzy Adaptive PID Control, using the method realization pair of fuzzy reasoning
The automatic adjusting of pid parameter reaches the stabilization to blast furnace top pressure to improve control effect in blast furnace TRT press control system
Control.
Referring to Fig. 1, a kind of blast furnace TRT based on Fuzzy Adaptive PID Control of the utility model presses control system, packet
Blast furnace, pipeline and turbine are included, air blower air inlet is discharged after passing sequentially through blast furnace, pipeline, turbine from gas exit；In blast furnace
It is provided with reaction vessel and first pressure container；Pipeline includes the first damping, second pressure container and the second damping.
When TRT device is run in normal conditions, turbine normal power generation, reducer unit and by-passing valve at this time is to be in
Closed state, and entrance butterfly valve, entrance gate valve, exit butterfly valve, outlet gate valve and fast cut valve are then in standard-sized sheet shape
State, therefore the valve in system can be ignored to the influence of blast furnace top pressure.At this moment the size of blast furnace top pressure is actually in system
It is to be realized by the adjusting of stator blade aperture in turbine, and the opening value is equal to always in the case where system normal operation
Or close to a setting value.According to the process flow of the above feature and blast furnace TRT, blast furnace is reduced to reaction vessel and pressure
The series model of container, pipeline are reduced to the series model of pressure vessel and upstream and downstream damping, and turbine is reduced to one linearly
Regulating valve, blast furnace TRT control system model is as shown in Figure 1 under finally obtained nominal situation.Wherein, what G was represented is State of Blast Furnace
The mass flow of top coal gas, what P was represented is the pressure value of top gas.
1) reaction vessel model
The generating process model of blast furnace gas can be indicated with empirical equation 1 after simplification are as follows:
Wherein:
G1(S) mass flow to generate coal gas in smelting process；
Gi (S) is the mass flow into the air inside blast furnace；
K1、T1Size for reaction constant, value is related with furnace structure and blast furnace burden etc..
2) pressure vessel model
Blast furnace pressure vessel enters, exports variable density in the mass-flow change and container of coal gas near its equalization point
Relationship such as formula 2:
Wherein:
R is body constant；
V is the volume of pressure vessel；
T0For gas temperature；
G1It (S) is the mass flow of pressure container inlet coal gas；
G2It (S) is the mass flow of pressure vessel outlet coal gas；
P (s) is gas pressure.
3) pipeline damper model
The relationship of the pressure drop of line entry and outlet and pipeline damped coefficient are as follows:
Wherein:
P1(s)、P2It (s) is line entry, the pressure of outlet；
G (s) is gas flow；
G0For the gas flow of matching point；
ε is pipeline damped coefficient, is set as constant value；
ρ is coal gas density；
S is pipeline section product.
4) Linear regulating valve model
Mass flow of the Linear regulating valve in its equalization point are as follows:
Wherein:
P10、P20For the pressure of Linear regulating valve rear and front end equalization point；
P1(s)、P2It (s) is the pressure at valve both ends；
L (s) is valve opening；
k、k0For the proportionality constant parameter of regulating valve；
ρ is gas density；
l0For valve matching point aperture.
Normal work is obtained according to the overall simplification model of the blast furnace TRT system under the above each unit pattern function and nominal situation
The dynamic mathematical models of blast furnace top pressure are as follows under condition:
It enables:
Transmission function between the blast furnace top pressure and turbine stator blade aperture of comprehensive income are as follows:
Wherein:
P1It (s) is system object controlled volume, i.e. blast furnace top pressure；
L (s) is that process object controls variable, i.e. turbine variable stator vane angle aperture；
Substitute into A, B, C, D, E, F1And F2It then can determine the structure of blast furnace top pressure dynamic mathematical models under nominal situation, push up
The order for pressing process object is 2.
Referring to Fig. 2, R is furnace top pressure setting value in the case where blast furnace TRT system operates normally；P is furnace top pressure
Measured value；E is pressure value deviation；U is turbine stator blade aperture；D is feeding disturbance；Gd(z-1) it is interfering channel transmission function；
GC(z-1) be feedback channel on controller transmission function；G0(z-1) be forward path on controlled device transmission function, i.e., just
Blast furnace top pressure mathematical model under normal operating condition.
Control system input quantity under nominal situation is furnace top pressure setting value R, and control amount (i.e. controller output valve) is
Turbine variable stator vane angle aperture U, system output quantity are actual blast furnace top pressure value P, and disturbance quantity is that introduced influence is high
The main interference of furnace roof pressure, i.e. blast furnace interval feeding operate D.In actual blast fumance process flow, blast furnace interval feeding
It operates general 4~5 minutes once, is 5 minutes by periodic quantity fixed setting, and in each operation cycle in this secondary design
Inside probably for about 40 seconds time.Also there is centainly stagnant to blast furnace top pressure control in the interval feeding operation in technical process
After influence, rule of thumb, which is about 6 seconds.
Blast furnace top pressure model structure and press Control system architecture it is known on the basis of, by press control system into
The analysis of row identifying closed loop, can obtain the identification objects of blast furnace top pressure control system under nominal situation.That is furnace top pressure P and turbine
The input/output relation formula of machine variable stator vane angle aperture U and feeding disturbance D are as follows:
P (k)=G0(z-1)u(k)+Gd(z-1)d(k) (12)
The continuous mathematical model of blast furnace top pressure is as follows under the final nominal situation for recognizing and bilinear transformation being used to obtain:
Error is not present in hypothesized model, then has:
The foundation of blast furnace TRT dynamic model, be subsequent blast furnace top pressure control algolithm research and entire control system it is excellent
Change design to lay a good foundation.
Using error e and error change ec as input, by constantly detection e and ec in operation, and fuzzy rule is utilized
Fuzzy reasoning is carried out, inquiry fuzzy matrix table carries out parameter adjustment, to meet the e and ec of different moments to pid parameter Self-tuning System
Requirement, modified online to pid parameter using fuzzy rule so that controlled device has good static, dynamic property,
As shown in Figure 3.
For different in system controlled process | e | and | ec |, pid parameter Δ KP、ΔKI、ΔKDSelf-tuning System principle such as
Under:
Error | e | when larger, in order to accelerate the response speed of system, make system have quick tracking performance, should take compared with
Big Δ KPWith lesser Δ KD.Meanwhile integral is saturated in order to prevent, is avoided system overshoot excessive, should be limited Δ KISize or
Make its zero.
Error | e | and | ec | when median size, in order to make system that there is lesser overshoot, lesser Δ K should be takenP, suitably
Δ KIWith Δ KD, especially Δ KDValue be affected (general value is smaller) to what system responded.
Error | e | when smaller, to make system that there is preferable steady-state performance, biggish Δ K should be takenPWith Δ KI.Meanwhile being
It avoids system from vibrating near equalization point, suitable Δ K should be chosenDValue.
| ec | when larger, smaller Δ K should be takenD；| ec | when smaller, larger Δ K should be takenD。
ΔKPFuzzy control rule table it is as follows:
ΔKIFuzzy control rule table it is as follows:
ΔKDFuzzy control rule table it is as follows:
The above content is only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within protection scope with novel claims.
Claims (5)
1. a kind of blast furnace TRT presses control system, which is characterized in that including blast furnace TRT, behind one end of blast furnace TRT and dedusting
Blast furnace gas connection, the other end pass through pipeline all the way and connect with generator, and another way and gaspipe network outlet connect, blast furnace TRT
It is inside provided with reaction vessel, one end of reaction vessel is connect with fan inlet, and the other end is by first pressure container and pipe
Road connection.
2. a kind of blast furnace TRT according to claim 1 presses control system, which is characterized in that pipeline includes second pressure
Container, one end of second pressure container and the first pressure container of blast furnace connect, and the other end is connect with Linear regulating valve.
3. a kind of blast furnace TRT according to claim 2 presses control system, which is characterized in that be provided with first in pipeline
Damping, one end of the first damping and the first pressure container of blast furnace connect, and the other end is connect with second pressure container.
4. a kind of blast furnace TRT according to claim 2 presses control system, which is characterized in that be provided with second in pipeline
One end of damping, the second damping is connect with second pressure container, and the other end is connect with turbine.
5. a kind of blast furnace TRT according to claim 1 presses control system, which is characterized in that Linear regulating valve is turbine
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820127727.XU CN208416637U (en) | 2018-01-25 | 2018-01-25 | A kind of blast furnace TRT press control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820127727.XU CN208416637U (en) | 2018-01-25 | 2018-01-25 | A kind of blast furnace TRT press control system |
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| CN208416637U true CN208416637U (en) | 2019-01-22 |
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| CN201820127727.XU Expired - Fee Related CN208416637U (en) | 2018-01-25 | 2018-01-25 | A kind of blast furnace TRT press control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301886A (en) * | 2018-01-25 | 2018-07-20 | 榆林学院 | Blast furnace TRT top pressures Controlling model based on fuzzy adaptivecontroller and control method |
-
2018
- 2018-01-25 CN CN201820127727.XU patent/CN208416637U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301886A (en) * | 2018-01-25 | 2018-07-20 | 榆林学院 | Blast furnace TRT top pressures Controlling model based on fuzzy adaptivecontroller and control method |
| CN108301886B (en) * | 2018-01-25 | 2023-12-12 | 榆林学院 | Blast furnace TRT top pressure control model and control method based on fuzzy self-adaptive control |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20190122 Termination date: 20200125 |