CN106011352A - Optimized control system for coal gas flow of blast-furnace hot blast stove - Google Patents
Optimized control system for coal gas flow of blast-furnace hot blast stove Download PDFInfo
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- CN106011352A CN106011352A CN201610587851.XA CN201610587851A CN106011352A CN 106011352 A CN106011352 A CN 106011352A CN 201610587851 A CN201610587851 A CN 201610587851A CN 106011352 A CN106011352 A CN 106011352A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
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Abstract
The invention relates to the technical field of optimized control for blast-furnace hot blast stoves, and discloses an optimized control system for a coal gas flow of a blast-furnace hot blast stove. The optimized control system is characterized in that a basic coal gas flow model, an arch-crown temperature protection model, a preferred-burning stove coal gas flow correction model, a single-burning coal gas flow correction model and a coal gas flow adjustor are arranged. According to the optimized control system, the problem of unreasonable distribution of the coal gas flow of the hot blast stove due to working condition changes and coal gas insufficiency of the hot blast stove are effectively solved, and floating adjustment for the coal gas flow of the hot blast stove according to real-time working conditions is realized, thus a coal gas is much efficiently utilized to obtain a higher air supply temperature, and the cost of blast-furnace iron-making is greatly reduced.
Description
Technical field
The present invention relates to blast funnace hot blast stove Optimized-control Technique field, particularly relate to a kind of blast funnace hot blast stove gas flow Optimal Control System.
Background technology
Metallurgy industry integrated environment is severeer at present, and enterprise saves energy and reduce the cost through various channels.For three A seating air stovees, during house steward's coal gas deficiency, two burn a scene sent is commonly present following problem: the air stove gas flow of initial burning stove is less, to meet the gas flow needs of the air stove that will blow, thus cause the stove dome temperature newly burnt relatively low, changing stove when, EGT is too low；And when two air stovees burn stove simultaneously, because branch gas tube regulates this full-gear of valve base, causing EGT to be difficult to control to, wind pushing temperature fluctuation is bigger.Meanwhile, gas flow is intervened by the on-the-spot mode using operative employee's telephone contact, to ensure gas main pressure stability, thereby results in that burning stove difficulty is big, controls the problem such as unstable with fired state not in time.
In sum, blast funnace hot blast stove running needs to adjust in real time according to actual condition gas flow to ensure the normal economical operation of air stove, but prior art cannot solve this problem, therefore develops native system.
Summary of the invention
In order to when solving blast funnace hot blast stove house steward's coal gas deficiency, each air stove distributes the unreasonable problem of coal gas amount, the present invention devises a kind of blast funnace hot blast stove gas flow Optimal Control System, it is at blast furnace hot blast stove combustion process, according to air stove service data, gas flow is adjusted in real time, the efficient utilization of coal gas needed for realizing air stove, obtain higher hot-blast furnace temperature, greatly reduce blast furnace ironmaking cost.
To achieve these goals, the present invention is by the following technical solutions:
A kind of blast funnace hot blast stove gas flow Optimal Control System, it is characterised in that be provided with basic gas flow model, dome temperature protection model, preferential burning producer gas flow correction model, free burning coal throughput correction model and gas flow actuator.
Basic gas flow model
Start to be stored in air stove relational database as a knowledge after the average Gas Flow value in a period of time, burning stove time, dome temperature, EGT, house steward's gas pressure, house steward's gas flow and house steward's gas temperature are added up using burning stove by optimum condition requirement by data statistics device, when again burning stove, run the knowledge bar of the coupling of real-time working condition inquiry air stove relational database according to current air stove, calculated by basic gas flow model and obtain basic gas flow.
Dome temperature protection model
Dome temperature protection mode input is dome temperature setting value and measured value; it is output as coal-air ratio increment and gas flow increment; this model calculation rule uses PREDICTIVE CONTROL and FUZZY ALGORITHMS FOR CONTROL; calculate in real time according to dome temperature measured value and dome temperature variation tendency; contrast with dome temperature setting value; corresponding coal-air ratio increment is exported during higher than given interval limit; export corresponding gas flow increment during higher than the given interval upper limit, be respectively acting on coal-air ratio and basic gas flow.
Preferential burning producer gas flow correction model
Preferential burning producer gas flow correction mode input is the gas flow of two air stovees, burn the stove time, gas valve position, EGT and prediction EGT, it is output as preferentially burning producer gas flow correction increment, it is respectively acting on described two air stovees, burning stove time short person is negative increment, burning stove time elder is positive increment, wherein, preferential conditions for use is described statistics two air stove that the hot blast stove burning time the is longer prediction EGTs burning producer gas flow correction model do not reach EGT setting value, coal gas valve seat opening is more than setting aperture, and gas flow persistently sets the time less than setting gas flow.
Free burning coal throughput correction model
The input of free burning coal throughput correction model enables signal, EGT, gas flow and air stove relational database for single fire, and it is output as gas flow correction increment, and wherein, it is that hot blast stove burning is become one from two that single fire enables signal conditioning；Free burning coal throughput correction model is by closing library of factors with air stove carry out data analysis and process to the gas flow during air stove single fire of single fire, EGT, it is calculated gas flow correction increment, and according to calorific value of gas, wind pushing temperature and cold flow, this gas flow correction increment is revised in real time during single fire.
Gas flow actuator
The input of gas flow actuator is gas flow setting value and measurement of gas flow value; wherein gas flow setting value is made up of basic gas flow, dome temperature protection gas flow increment, preferential burning producer gas flow correction increment and free burning coal throughput correction increment; gas flow actuator is output as Gas Flow adjustable valve, and gas flow actuator uses pid control algorithm or Neural Network Control Algorithm or FUZZY ALGORITHMS FOR CONTROL.
The invention have the advantages that: the basic gas flow model realization hot blast stove burning incipient stage gas flow floating regulatory function according to air stove real-time working condition, preferably adaptation condition change, dome temperature protects model realization air stove dome temperature to be adjusted in margin of safety, the preferential producer gas flow correction model combustion heat wind furnace when coal gas deficiency that burns realizes mutually coordinated function, ensure that what wind pushing temperature and air stove ran stablizes, free burning coal throughput correction model solves the problem that this stove caused because of air stove working conditions change burns producer gas Traffic Anomaly.
By above technological means, the present invention efficiently solves the air stove gas flow unreasonable distribution problem caused because of air stove working conditions change and coal gas deficiency, make Combustion of Hot Air Furnace the most reasonable, wind pushing temperature is more stable, automatically burns furnace system and can better conform to because of the fluctuation operating mode such as calorific value of gas, gas main pressure.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of blast funnace hot blast stove gas flow Optimal Control System the general frame.
Accompanying drawing 2 preferentially burns producer gas flow correction model framework chart for blast funnace hot blast stove.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
Basic gas flow model
Find from air stove relational database according to current house steward's gas pressure, house steward's gas flow and house steward's gas temperature and meet the above three parameter dependency relation optimum condition knowledge bar not more than three higher than 0.95 and be weighted to obtain current basic gas flow.
Dome temperature protection model
Dome temperature passes through vault predicted temperature T_YC after predictive control algorithm obtains N minute, this vault predicted temperature T_YC exports coal-air ratio increment E_FMB and gas flow increment E_JBMQL with dome temperature setting value T_SD by FUZZY ALGORITHMS FOR CONTROL, and this FUZZY ALGORITHMS FOR CONTROL rule is
If T_YC-T_SD>E_L and IF T_YC-T_SD<E_H, then E_FMB=M；
If T_YC-T_SD > E_H, then E_JBMQL=Q；
Wherein, E_H and E_L is respectively given interval bound, M and Q is respectively given coal-air ratio increment and gas flow increment.
Preferential burning producer gas flow correction model
As shown in Figure 2, for air stove 1, judge whether this air stove will blow by burning the stove time, if not air stove will be blown, then air stove 2 is for blowing air stove, otherwise air stove 1 is for blowing, judge the most again to predict whether EGT reaches EGT setting value, if it is up to standard, then burn stove by current state and can meet air-supply, otherwise illustrate that this air stove gas flow is less than normal, need to carry out gas flow increase, if now gas valve position is less than setting aperture 90%, then continue to increase coal gas valve seat opening, otherwise need by air stove 2 being carried out turn out the gas regulation valve operation, to realize the increase of the gas flow of air stove 1.
Free burning coal throughput correction model
Single fire enable signal be two just main combustion period air stove described single fire when wherein an air stove transfers cold stoking to enable signal trigger be true；Free burning coal throughput correction model obtains this moment gas flow correction increment according to the gas flow that single fire enable signal is true time and EGT and EGT trend by air stove relational database analysis, during single fire, according to calorific value of gas, wind pushing temperature and cold flow, this gas flow correction increment is adjusted in real time, wherein, free burning coal throughput correction delta adjustment range is 5000～15000m/h.
Gas flow actuator
The input of gas flow actuator is gas flow setting value and measurement of gas flow value; wherein gas flow setting value is made up of basic gas flow, dome temperature protection gas flow increment, preferential burning producer gas flow correction increment and free burning coal throughput correction increment; gas flow actuator is output as Gas Flow adjustable valve; gas flow actuator uses pid control algorithm; wherein proportionality constant P span 200～300; integral constant I span 30～50, differential D value 0～5.
Claims (1)
1. a blast funnace hot blast stove gas flow Optimal Control System, it is characterised in that be provided with basic gas flow model, dome temperature protection model, preferential burning producer gas flow correction model, free burning coal throughput correction model and gas flow actuator；
Basic gas flow model
Start to be stored in air stove relational database as a knowledge after the average Gas Flow value in a period of time, burning stove time, dome temperature, EGT, house steward's gas pressure, house steward's gas flow and house steward's gas temperature are added up using burning stove by optimum condition requirement by data statistics device, when again burning stove, run the knowledge bar of the coupling of real-time working condition inquiry air stove relational database according to current air stove, calculated by basic gas flow model and obtain basic gas flow；
Dome temperature protection model
Dome temperature protection mode input is dome temperature setting value and measured value; it is output as coal-air ratio increment and gas flow increment; this model calculation rule uses PREDICTIVE CONTROL and FUZZY ALGORITHMS FOR CONTROL; calculate in real time according to dome temperature measured value and dome temperature variation tendency; contrast with dome temperature setting value; corresponding coal-air ratio increment is exported during higher than given interval limit; export corresponding gas flow increment during higher than the given interval upper limit, be respectively acting on coal-air ratio and basic gas flow；
Preferential burning producer gas flow correction model
Preferential burning producer gas flow correction mode input is the gas flow of two air stovees, burn the stove time, gas valve position, EGT and prediction EGT, it is output as preferentially burning producer gas flow correction increment, it is respectively acting on described two air stovees, burning stove time short person is negative increment, burning stove time elder is positive increment, wherein, preferential conditions for use is described statistics two air stove that the hot blast stove burning time the is longer prediction EGTs burning producer gas flow correction model do not reach EGT setting value, coal gas valve seat opening is more than setting aperture, and gas flow persistently sets the time less than setting gas flow；
Free burning coal throughput correction model
The input of free burning coal throughput correction model enables signal, EGT, gas flow and air stove relational database for single fire, and it is output as gas flow correction increment, and wherein, it is that hot blast stove burning is become one from two that single fire enables signal conditioning；Free burning coal throughput correction model is by closing library of factors with air stove carry out data analysis and process to the gas flow during air stove single fire of single fire, EGT, it is calculated gas flow correction increment, and according to calorific value of gas, wind pushing temperature and cold flow, this gas flow correction increment is revised in real time during single fire；
Gas flow actuator
The input of gas flow actuator is gas flow setting value and measurement of gas flow value; wherein gas flow setting value is made up of basic gas flow, dome temperature protection gas flow increment, preferential burning producer gas flow correction increment and free burning coal throughput correction increment; gas flow actuator is output as Gas Flow adjustable valve, and gas flow actuator uses pid control algorithm or Neural Network Control Algorithm or FUZZY ALGORITHMS FOR CONTROL.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591526A (en) * | 2016-12-30 | 2017-04-26 | 山东和隆优化能源科技有限公司 | Flow-free combustion control system for blast furnace hot blast stove |
| CN106765022A (en) * | 2016-12-30 | 2017-05-31 | 江苏和隆优化能源科技有限公司 | The many stove coordination optimizing control systems of many criterions based on boiler efficiency |
| CN107326137A (en) * | 2017-06-27 | 2017-11-07 | 中南大学 | Blast funnace hot blast stove burns stove process operating parameters multistage matching optimization method at times |
| CN109598643A (en) * | 2018-12-12 | 2019-04-09 | 中国地质大学（武汉） | A kind of annealing furnace subregion gas flow distribution method, equipment and storage equipment |
| CN109856967A (en) * | 2019-04-09 | 2019-06-07 | 山东和隆优化智能科技有限公司 | A kind of smelter gaspipe network intelligent coordinated control system |
| CN110699502A (en) * | 2019-09-30 | 2020-01-17 | 鞍钢集团自动化有限公司 | Method for high-precision prediction of gas consumption of blast furnace hot blast stove |
| CN112795716A (en) * | 2020-12-28 | 2021-05-14 | 鞍钢集团自动化有限公司 | Efficient and practical hot blast stove burning control method |
| CN114317860A (en) * | 2022-01-05 | 2022-04-12 | 山东钢铁股份有限公司 | Combustion control method of heat accumulating type hot blast stove |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106591526A (en) * | 2016-12-30 | 2017-04-26 | 山东和隆优化能源科技有限公司 | Flow-free combustion control system for blast furnace hot blast stove |
| CN106765022A (en) * | 2016-12-30 | 2017-05-31 | 江苏和隆优化能源科技有限公司 | The many stove coordination optimizing control systems of many criterions based on boiler efficiency |
| CN106765022B (en) * | 2016-12-30 | 2022-09-06 | 江苏和隆优化能源科技有限公司 | Multi-criterion multi-furnace coordinated optimization control system based on boiler energy efficiency |
| CN107326137A (en) * | 2017-06-27 | 2017-11-07 | 中南大学 | Blast funnace hot blast stove burns stove process operating parameters multistage matching optimization method at times |
| CN107326137B (en) * | 2017-06-27 | 2018-05-08 | 中南大学 | Blast funnace hot blast stove burns stove process operating parameters multistage matching optimization method at times |
| CN109598643A (en) * | 2018-12-12 | 2019-04-09 | 中国地质大学（武汉） | A kind of annealing furnace subregion gas flow distribution method, equipment and storage equipment |
| CN109856967A (en) * | 2019-04-09 | 2019-06-07 | 山东和隆优化智能科技有限公司 | A kind of smelter gaspipe network intelligent coordinated control system |
| CN110699502A (en) * | 2019-09-30 | 2020-01-17 | 鞍钢集团自动化有限公司 | Method for high-precision prediction of gas consumption of blast furnace hot blast stove |
| CN112795716A (en) * | 2020-12-28 | 2021-05-14 | 鞍钢集团自动化有限公司 | Efficient and practical hot blast stove burning control method |
| CN114317860A (en) * | 2022-01-05 | 2022-04-12 | 山东钢铁股份有限公司 | Combustion control method of heat accumulating type hot blast stove |
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| CN106011352B (en) | 2018-04-17 |
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Address after: Room 1208, Building C, Xingzhi Science Park, Xingzhi Road, Nanjing Economic and Technological Development Zone, Jiangsu Province Patentee after: JIANGSU HELONG OPTIMIZATION INTELLIGENT TECHNOLOGY CO., LTD Address before: Room 1208, Building C, Xingzhi Science Park, Xingzhi Road, Nanjing Economic and Technological Development Zone, Jiangsu Province Patentee before: Jiangsu long and optimize energy technology Co., Ltd. |
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