CN108796152A - A kind of blast furnace top pressure auto-adjustment control method - Google Patents
A kind of blast furnace top pressure auto-adjustment control method Download PDFInfo
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- CN108796152A CN108796152A CN201810579728.2A CN201810579728A CN108796152A CN 108796152 A CN108796152 A CN 108796152A CN 201810579728 A CN201810579728 A CN 201810579728A CN 108796152 A CN108796152 A CN 108796152A
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- top pressure
- blast furnace
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- control system
- furnace top
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/006—Automatically controlling the process
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
The present invention relates to a kind of blast furnace top pressure auto-adjustment control methods, the blast furnace top pressure auto-adjustment control method uses the TRT control systems and reducer unit control system that Parallel Control is carried out to blast furnace top pressure, and reducer unit control system includes a plurality of PID automatic regulating valves and a manual modulation valve.The present invention is combined according to the ingenious several regulating valves that reducer unit control system is utilized of fluctuation pattern and characteristic of blast furnace top pressure and is adjusted.PID automatic regulating valves in reducer unit control system can automatically adjust P, I parameter, and appropriate adjustment is made to the operation condition of PID automatic regulating valves and opening valve degree according to different blast furnace characteristics, adaptable.It solves the problems, such as that blast furnace furnace top pressure fluctuating range in no cloth, cloth coke and cloth ore is big by the adjusting of each regulating valve in reducer unit control system, by blast furnace top pressure undulated control in ± 3kPa or so, ensures conditions of blast furnace direct motion.
Description
Technical field
The present invention relates to blast furnace top pressure control technology fields, more specifically refer to that a kind of blast furnace top pressure is automatic
Adjustment control method.
Background technology
TRT control systems and reducer unit control system co- controlling is usually used in the control of blast furnace top pressure,
Medium and small blast furnace reducer unit control system generally uses three pressure reducing valves, big pressure reducing valve of blast furnace set control system generally to use four
Regulating valve.The reducer unit control system of traditional blast furnace top pressure uses small-bore fast-acting modulator valve to be automatically adjusted for PID
Valve, remaining 2 or 3 regulating valves are manual modulation valve.It, can will be high using this adjusting method in blast furnace material distribution coke
Furnace roof presses undulated control in ± 5kPa or so.In blast furnace material distribution ore, blast furnace top pressure undulated control is in ± 8kPa or so, sometimes
Can be more than ± 10kPa, blast furnace top pressure fluctuation is larger.Blast furnace top pressure fluctuation can not only influence conditions of blast furnace direct motion greatly,
Also distributing device cooling water flow can be caused suddenly big or suddenly small, therefore, we provide a kind of blast furnace top pressure auto-adjustment control side
Method.
Invention content
The present invention provides a kind of blast furnace top pressure auto-adjustment control method, to solve to use existing reducer unit control
Furnace top pressure fluctuation is greatly to influence conditions of blast furnace direct motion and cause cooling water flow suddenly big or suddenly small etc. when system control blast furnace processed
Problem.
The present invention adopts the following technical scheme that：
A kind of blast furnace top pressure auto-adjustment control method, this method is used carries out Parallel Control to blast furnace top pressure
TRT control systems and reducer unit control system, the reducer unit control system include a plurality of PID automatic regulating valves and one
A manual modulation valve, specific regulating step are as follows：
（1）, when blast furnace is without cloth, it is that PID is adjusted automatically to select the slow regulating valve of reducer unit control system medium caliber big-movement
Valve is saved to eliminate the static difference of furnace top pressure and top pressure given value；
（2）, when blast furnace material distribution coke, it is that PID is adjusted automatically to select the small fast-acting modulator valve of reducer unit control system medium caliber
Section valve fluctuates to adjust top pressure, i.e. furnace top pressure-top pressure given value>When 1.5kPa, PID automatic regulating valves open 10% aperture, when
Furnace top pressure-top pressure given value<- 1.5kPa, PID automatic regulating valve close 10% aperture；
（3）, when blast furnace material distribution ore, it is that PID automatic regulating valves come to select the big regulating valve of reducer unit control system bore
Adjust top pressure fluctuation, i.e. furnace top pressure-top pressure given value>When 0.5kPa, PID automatic regulating valves open 15% aperture, when furnace roof pressure
Power-top pressure given value<- 2.5kPa, PID automatic regulating valve close 15% aperture.
Further, the reducer unit control system is big pressure reducing valve of blast furnace set control system, then the big blast furnace subtracts
Pressure valve set control system uses four regulating valves, wherein three are PID automatic regulating valves, the 4th regulating valve is manual normally opened tune
Valve is saved, adjusts manual normally opened regulating valve manually according to blast furnace top pressure situation in 30%~50% aperture.
Further, the reducer unit control system is small furnace reducer unit control system, then the small furnace subtracts
It is PID automatic regulating valves that pressure valve set control system, which uses three regulating valves, two of which, and third regulating valve position both undertakes PID
Automatic regulating valve also takes on adjusts normally open valve manually, can first open and be had ready conditions action further according to actual conditions after 50% aperture manually
It adjusts.
Further, when the PID automatic regulating valves break down, one key switching to third regulating valve, third is adjusted
The former function of section valve is added in the 4th regulating valve, and the 4th regulating valve had both undertaken PID automatic regulating valves and also taken on hand at this time
It is dynamic to adjust normally open valve, to ensure that blast furnace top pressure steadily controls.
Further, it is additionally provided with control valve position failure safe interlocking in the reducer unit control system, works as detection
In to reducer unit control system when control valve position exception, the interlocking of control valve position failure safe, which will disconnect, there is abnormal tune
Valve is saved, it is controlled and exports and alarm, control valve position still keeps in situ.
Further, when blast furnace top pressure undulated control is in ± 2kPa, TRT controls are switched to by reducer unit control system
System, inputs the TRT top pressures given value and blast furnace top pressure given value of needs, and the blast furnace top pressure given value ratio TRT top pressures of input are given
The big 5kPa of definite value, at this time the PID automatic regulating valves of reducer unit control system can be automatically adjusted to off-position, complete switch operating.
Further, when blast furnace top pressure fluctuation increases to over 5kPa suddenly, reducer unit is switched to by TRT control systems
Control system, inputs the blast furnace top pressure given value of needs, and the blast furnace top pressure given value of input subtracts as TRT top pressure given values
Pressure valve set control system opens each PID automatic regulating valves according to actual conditions operation condition, opens manual modulation valve manually and arrives
The stator blade valve that TRT control systems are closed behind 30% valve position, blast furnace top pressure is controlled by reducer unit control system.
By the above-mentioned description of this invention it is found that compared to the prior art, the invention has the advantages that：
The present invention is according to the ingenious several tune that reducer unit control system is utilized of fluctuation pattern and characteristic of blast furnace top pressure
It saves valve group and closes adjusting.It is adjusted to 2 to 3 adjustings by a traditional PID automatic regulating valve and 2 to 3 manual normally opened regulating valves
Valve and a manual normally opened regulating valve, the PID automatic regulating valves in reducer unit control system can automatically adjust P, I parameter,
Appropriate adjustment is made to the operation condition of PID automatic regulating valves and opening valve degree according to different blast furnace characteristics, it is adaptable.It is logical
The adjusting for crossing each regulating valve in pressure reducing valve set control system solves blast furnace stove in no cloth, cloth coke and cloth ore
The big problem of pressure on top surface fluctuating range ensures conditions of blast furnace direct motion by blast furnace top pressure undulated control in ± 3kPa or so.
Specific implementation mode
A kind of blast furnace top pressure auto-adjustment control method, the auto-adjustment control method are used to blast furnace top pressure
The TRT control systems and reducer unit control system of Parallel Control are carried out, reducer unit control system includes a plurality of PID automatic
Regulating valve and a manual modulation valve.
When blast furnace is without cloth, the regulating valve for selecting reducer unit control system medium caliber big-movement slow is that PID is adjusted automatically
Valve is saved to eliminate the static difference of furnace top pressure and top pressure given value；When blast furnace material distribution coke, select in reducer unit control system
The small fast-acting modulator valve of bore fluctuates for PID automatic regulating valves to adjust top pressure, i.e. furnace top pressure-top pressure given value>1.5kPa
When, PID automatic regulating valves open 10% aperture, when furnace top pressure-top pressure given value<- 1.5kPa, PID automatic regulating valve are closed
10% aperture；When blast furnace material distribution ore, the regulating valve for selecting reducer unit control system medium caliber big is PID automatic regulating valves
To adjust top pressure fluctuation, i.e. furnace top pressure-top pressure given value>When 0.5kPa, PID automatic regulating valves open 15% aperture, work as furnace roof
Pressure-top pressure given value<- 2.5kPa, PID automatic regulating valve close 15% aperture.
Big pressure reducing valve of blast furnace set control system uses four regulating valves, wherein three are PID automatic regulating valves, the 4th tune
It is manual normally opened regulating valve to save valve, is adjusted manually in 30%~50% aperture according to blast furnace top pressure situation.Small furnace reducer unit is adopted
With three regulating valves, two of which is PID automatic regulating valves, and third regulating valve position had both undertaken PID automatic regulating valves and also taken on
Normally open valve is adjusted manually, can first be opened action of having ready conditions after 50% aperture manually and be adjusted, the top of four regulating valves equally may be implemented
Press regulating effect.
The interlocking of control valve position failure safe is also set up in reducer unit control system, when detecting that PID adjusts
When valve valve position exception, the interlocking of control valve position failure safe, which will disconnect, there are abnormal PID regulating valves, controls it and exports and report
Alert, control valve position keeps in situ.One key switching is to third regulating valve, third if when PID automatic regulating valves break down
The former function of a regulating valve is added in the 4th regulating valve, and the 4th regulating valve had both undertaken PID automatic regulating valves and also taken on hand
It is dynamic to adjust normally open valve, to ensure that blast furnace top pressure steadily controls.
It is high when being switched to TRT control systems by reducer unit control system when blast furnace top pressure undulated control is in ± 2kPa
First contact TRT operative employees carry out TRT control system preparations to furnaceman's length, and after the completion of preparation, blast furnace section chief is in furnace roof pressure
The TRT top pressures given value and blast furnace top pressure given value that the operation pages input of power automatic regulating system needs, the high furnace roof of input
The given value ratio TRT big 5kPa of top pressure given value are pressed, the PID automatic regulating valves of reducer unit control system can be automatically adjusted at this time
Off-position completes switch operating.At this moment reducer unit control system is also in auto state, is pushed up because being controlled in TRT control systems
When blast furnace top pressure, if top pressure undulated control, in ± 2kPa or so, reducer unit control system will not act.
When blast furnace top pressure fluctuation increases to over 5kPa suddenly, reducer unit control system is switched to by TRT control systems,
Blast furnace section chief contacts TRT operative employees and carries out pressurizing valve set control system preparation, the blast furnace section chief after TRT operative employees allow
In the blast furnace top pressure given value that the operation pages input of furnace top pressure automatic regulating system needs, the blast furnace top pressure given value of input
As TRT top pressure given values, reducer unit control system is opened each PID according to actual conditions operation condition and is adjusted automatically at this time
Valve is saved, notice TRT operative employee's switch operatings are completed after then opening manual modulation valve to 30% valve position manually, and TRT operative employees are closed
Close the stator blade valve of TRT control systems.Reducer unit control system can have operation condition to start to open at according to PID automatic regulating valves,
It avoids blast furnace top pressure from rising too high, by blast furnace top pressure undulated control in ± 3kPa or so, plays a protective role.
The specific implementation mode of the present invention is above are only, but the design concept of the present invention is not limited thereto, it is all to utilize this
Conceive the change for carrying out unsubstantiality to the present invention, the behavior for invading the scope of the present invention should all be belonged to.
Claims (7)
1. a kind of blast furnace top pressure auto-adjustment control method, this method is used carries out Parallel Control to blast furnace top pressure
TRT control systems and reducer unit control system, it is characterised in that：The reducer unit control system include a plurality of PID from
Dynamic regulating valve and a manual modulation valve, specific regulating step are as follows：
(1), when blast furnace is without cloth, the regulating valve for selecting reducer unit control system medium caliber big-movement slow is that PID is adjusted automatically
Valve is saved to eliminate the static difference of furnace top pressure and top pressure given value；
(2), when blast furnace material distribution coke, the fast-acting modulator valve for selecting reducer unit control system medium caliber small is that PID is adjusted automatically
Section valve fluctuates to adjust top pressure, i.e. furnace top pressure-top pressure given value>When 1.5kPa, PID automatic regulating valves open 10% aperture, when
Furnace top pressure-top pressure given value<- 1.5kPa, PID automatic regulating valve close 10% aperture；
(3), when blast furnace material distribution ore, the regulating valve for selecting reducer unit control system bore big is come for PID automatic regulating valves
Adjust top pressure fluctuation, i.e. furnace top pressure-top pressure given value>When 0.5kPa, PID automatic regulating valves open 15% aperture, when furnace roof pressure
Power-top pressure given value<- 2.5kPa, PID automatic regulating valve close 15% aperture.
2. a kind of blast furnace top pressure auto-adjustment control method as described in claim 1, it is characterised in that：The pressure reducing valve
Set control system is big pressure reducing valve of blast furnace set control system, then the big pressure reducing valve of blast furnace set control system is using four adjustings
Valve, wherein three are PID automatic regulating valves, the 4th regulating valve is manual normally opened regulating valve, manual according to blast furnace top pressure situation
Manual normally opened regulating valve is adjusted in 30%~50% aperture.
3. a kind of blast furnace top pressure auto-adjustment control method as described in claim 1, it is characterised in that：The pressure reducing valve
Set control system is small furnace reducer unit control system, then the small furnace reducer unit control system is using three adjustings
Valve, two of which are PID automatic regulating valves, and third regulating valve position had both undertaken PID automatic regulating valves and also taken on adjusting manually often
Valve opening can be opened first and be adjusted further according to actual conditions action of having ready conditions after 50% aperture manually.
4. a kind of blast furnace top pressure auto-adjustment control method as claimed in claim 2, it is characterised in that：The PID is certainly
When dynamic regulating valve breaks down, one key switching to third regulating valve, the former function of third regulating valve is added to the 4th tune
It saves on valve, the 4th regulating valve had both undertaken PID automatic regulating valves and also taken on adjusting normally open valve manually at this time, to ensure blast furnace top pressure
Steady control.
5. a kind of blast furnace top pressure auto-adjustment control method as claimed in claim 2, it is characterised in that：The pressure reducing valve
Control valve position failure safe interlocking is additionally provided in set control system, when detecting regulating valve valve in reducer unit control system
When position is abnormal, the interlocking of control valve position failure safe, which will disconnect, there is abnormal regulating valve, controls it and exports and alarm, regulating valve
Valve position still keeps in situ.
6. a kind of blast furnace top pressure auto-adjustment control method as described in claim 1, it is characterised in that：Work as blast furnace top pressure
Undulated control is switched to TRT control systems in ± 2kPa, by reducer unit control system, and the TRT top pressures for inputting needs are given
Value and blast furnace top pressure given value, the blast furnace top pressure given value ratio TRT big 5kPa of top pressure given value of input, at this time reducer unit control
The PID automatic regulating valves of system can be automatically adjusted to off-position, complete switch operating.
7. a kind of blast furnace top pressure auto-adjustment control method as described in claim 1, it is characterised in that：Work as blast furnace top pressure
When fluctuation increases to over 5kPa suddenly, reducer unit control system is switched to by TRT control systems, inputs the blast furnace top pressure of needs
Given value, for the blast furnace top pressure given value of input as TRT top pressure given values, reducer unit control system is dynamic according to actual conditions
Make condition and open each PID automatic regulating valves, the quiet of TRT control systems is closed after opening manual modulation valve to 30% valve position manually
Leaf valve controls blast furnace top pressure by reducer unit control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810579728.2A CN108796152A (en) | 2018-06-07 | 2018-06-07 | A kind of blast furnace top pressure auto-adjustment control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810579728.2A CN108796152A (en) | 2018-06-07 | 2018-06-07 | A kind of blast furnace top pressure auto-adjustment control method |
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| CN108796152A true CN108796152A (en) | 2018-11-13 |
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| CN201810579728.2A Pending CN108796152A (en) | 2018-06-07 | 2018-06-07 | A kind of blast furnace top pressure auto-adjustment control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110106298A (en) * | 2019-04-23 | 2019-08-09 | 宣化钢铁集团有限责任公司 | Improve the stable and safe control method of blast furnace top pressure |
| CN111778372A (en) * | 2020-06-28 | 2020-10-16 | 广东韶钢工程技术有限公司 | Control method for pressure regulating valve bank of blast furnace top pressure |
| CN112094971A (en) * | 2019-06-17 | 2020-12-18 | 宝钢集团新疆八一钢铁有限公司 | Four-valve-bank control optimization method for blast furnace |
| CN113201610A (en) * | 2021-04-21 | 2021-08-03 | 北京首钢自动化信息技术有限公司 | Control method and system for blast furnace top pressure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110106298A (en) * | 2019-04-23 | 2019-08-09 | 宣化钢铁集团有限责任公司 | Improve the stable and safe control method of blast furnace top pressure |
| CN112094971A (en) * | 2019-06-17 | 2020-12-18 | 宝钢集团新疆八一钢铁有限公司 | Four-valve-bank control optimization method for blast furnace |
| CN111778372A (en) * | 2020-06-28 | 2020-10-16 | 广东韶钢工程技术有限公司 | Control method for pressure regulating valve bank of blast furnace top pressure |
| CN111778372B (en) * | 2020-06-28 | 2022-02-01 | 广东韶钢工程技术有限公司 | Control method for pressure regulating valve bank of blast furnace top pressure |
| CN113201610A (en) * | 2021-04-21 | 2021-08-03 | 北京首钢自动化信息技术有限公司 | Control method and system for blast furnace top pressure |
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Application publication date: 20181113 |
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