CN102221220A - Pulse-combustion control method of steel rolling heating furnace - Google Patents
Pulse-combustion control method of steel rolling heating furnace Download PDFInfo
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- CN102221220A CN102221220A CN2011100769104A CN201110076910A CN102221220A CN 102221220 A CN102221220 A CN 102221220A CN 2011100769104 A CN2011100769104 A CN 2011100769104A CN 201110076910 A CN201110076910 A CN 201110076910A CN 102221220 A CN102221220 A CN 102221220A
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- burner nozzle
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Abstract
The invention discloses a pulse-combustion control method of a steel rolling heating furnace, namely at least four gas nozzles are arranged at the two sides of the heating furnace and located at the upper and lower parts of blanks in the blank along the length direction of the oven, thus whole-side-burning is formed for the heating furnace, the pulse of opening and closing of the whole gas nozzles is finished in T time and T is taken as a cycle period, each gas nozzle is opened at Ts interval successively, the quantity of the gas nozzles is N, thus in a pulse cycle period Ts=T/N, each gas nozzle open pulse order is set as required and opened by rated heating efficiency, each gas nozzle open pulse time is T1, T2...TQ, and the each gas nozzle open pulse time T1, T2... and TQ are calculated by the PID controller of the heating furnace control system according to the set value and the measured value of the furnace temperature. The pulse-combustion control method provided by the invention has the advantages of improving the furnace-shape, balancing the workload of the gas nozzle, improving fuel burn-off rate, strengthening the heat transfer efficiency of the blank, saving the fuel loss and improving control accuracy and flexibility of the furnace temperature, and is convenient in maintain and operation.
Description
Technical field
The present invention relates to a kind of pulse-combustion control method of heater for rolling steel.
Background technology
General heater for rolling steel employing ratio burning control, i.e. dual crossing amplitude limit control, at the heating furnace top or the axial burner of lower disposed, or at the top layout flat flame burner.Whole heating furnace generally heats according to some subregions of preheating section, bringing-up section and soaking zone, heat demand according to each temperature controlled region of heating furnace, supply with the gas quantity of each burner by the corresponding adjusting of PID controller of heating furnace automatic control system, and carry out corresponding combustion-supporting tolerance according to certain empty combustion proportioning and regulate, promptly adopt the mode of adjusting each burner heating efficiency (large and small fire) to realize the temperature control target of heating furnace.The method for controlling combustion of above-mentioned heating furnace changes greatly the burner live load, and fuel after-flame rate variance causes generating more pollutant, and the blank heat transfer efficiency is lower in the stove, the Control for Kiln Temperature very flexible; And the layout of burner makes the stove-shaped structure complexity, and the attended operation environment is poor.
Summary of the invention
Technical problem to be solved by this invention provides a kind of pulse-combustion control method of heater for rolling steel, this method has been improved stove-shaped structure, made things convenient for attended operation, the balanced live load of fuel burner nozzle, improved the fuel burn-off rate, strengthen the heat transfer efficiency of blank, improved Control for Kiln Temperature precision and flexibility.
For solving the problems of the technologies described above, the pulse-combustion control method of heater for rolling steel of the present invention comprises the PID controller of at least four fuel burner nozzles and heating furnace automatic control system it is characterized in that this method comprises the steps:
The pulse of step 2, all fuel burner nozzle opening and closing is finished in the time and the T time is cycle period at T, each fuel burner nozzle successively and the interval T s time open, fuel burner nozzle quantity is Q, then at a pulse cycle Ts=T/Q or Ts=T/(Q/2 in the cycle);
Step 3, each fuel burner nozzle unbalanced pulse order can be adjusted, and each the unlatching all of each fuel burner nozzle opened with specified heating efficiency;
Step 4, the unbalanced pulse time of each fuel burner nozzle in each cycle period T are T
1, T
2T
Q, carry out computing according to the furnace temperature setting value with measured value by the PID controller of heating furnace automatic control system, and export each fuel burner nozzle pulse open-interval percentage in each cycle period T
,
In the formula: Kp, Ki, Kd are the adjustment constant of PID controller,
Be the fuel burner nozzle sequence number, e (t) is furnace temperature setting value and deviation of measuring value amount, and t is the sampling period of PID controller,
The pulse opening time percentage of each fuel burner nozzle in each cycle period T
Obtain the pulse opening time T of each fuel burner nozzle in each cycle period T mutually at convenience with cycle period T
1, T
2T
Q
According to the actual condition of heating furnace, above-mentioned cycle period T can get 0＜T≤300 second.
Because the pulse-combustion control method of heater for rolling steel of the present invention has adopted technique scheme, promptly along the furnace superintendent direction will at least four fuel burner nozzle Cheng Shuan be arranged in the heating furnace both sides and be positioned at the stove blank about, make heating furnace form full side and burn; All the pulse of fuel burner nozzle opening and closing is finished in the time and the T time is cycle period at T, each fuel burner nozzle successively and the interval T s time open, fuel burner nozzle quantity is N, then at pulse cycle Ts=T/N in the cycle; Each fuel burner nozzle unbalanced pulse order is set as required and each the unlatching all opened with specified heating efficiency; Each fuel burner nozzle unbalanced pulse time is T
1, T
2T
Q, calculate each fuel burner nozzle unbalanced pulse time T according to the furnace temperature setting value with measured value by the PID controller of heater control system
1, T
2T
QThis method has been improved stove-shaped structure, has made things convenient for attended operation, and the balanced live load of fuel burner nozzle has improved the fuel burn-off rate, has strengthened the heat transfer efficiency of blank, and fuel savings consumption has improved Control for Kiln Temperature precision and flexibility.
Description of drawings
The present invention is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 arranges schematic diagram for heating furnace fuel burner nozzle of the present invention,
The pulse train schematic diagram that Fig. 2 opens for the present invention each fuel burner nozzle interval T s=T/N time,
Fig. 3 is each fuel burner nozzle interval T s=T/(N/2 of the present invention) the equal pulse train schematic diagram of corresponding burner unbalanced pulse of time.
Fig. 4 is each fuel burner nozzle interval T s=T/(N/2 of the present invention) the pulse train schematic diagram that do not wait of corresponding burner unbalanced pulse of time.
The specific embodiment
The pulse-combustion control method of heater for rolling steel of the present invention comprises the PID controller of at least four fuel burner nozzles and heating furnace automatic control system it is characterized in that this method comprises the steps:
The pulse of step 2, all fuel burner nozzle opening and closing is finished in the time and the T time is cycle period at T, each fuel burner nozzle successively and the interval T s time open, fuel burner nozzle quantity is Q, then at a pulse cycle Ts=T/Q or Ts=T/(Q/2 in the cycle);
Step 3, each fuel burner nozzle unbalanced pulse see that in proper order 2 adjust, and each the unlatching all of each fuel burner nozzle opened with specified heating efficiency;
Step 4, the unbalanced pulse time of each fuel burner nozzle in each cycle period T are T
1, T
2T
Q, carry out computing according to the furnace temperature setting value with measured value by the PID controller of heating furnace automatic control system, and export each fuel burner nozzle pulse open-interval percentage in each cycle period T
,
In the formula: Kp, Ki, Kd are the adjustment constant of PID controller,
Be the fuel burner nozzle sequence number, e (t) is furnace temperature setting value and deviation of measuring value amount, and t is the sampling period of PID controller,
The pulse opening time percentage of each fuel burner nozzle in each cycle period T
Obtain the pulse opening time T of each fuel burner nozzle in each cycle period T mutually at convenience with cycle period T
1, T
2T
Q
According to the actual condition of heating furnace, above-mentioned cycle period T can get 0＜T≤300 second.
As shown in Figure 2, be example with four fuel burner nozzles, B1, B2, B3, B4 be four fuel burner nozzles respectively, and T is the pulse cycle cycle, and Ts opens blanking time, Ts=T/N, T for each fuel burner nozzle
1, T
2, T
3, T
4And T
1＇, T
2＇, T
3＇, T
4＇ is respectively each fuel burner nozzle at the unbalanced pulse of two pulse cycle in the cycle;
As shown in Figure 3 and Figure 4, be example with four fuel burner nozzles, B1, B2, B3, B4 be four fuel burner nozzles respectively, and T is the pulse cycle cycle, and Ts opens blanking time for each fuel burner nozzle, Ts=T/(N/2), T
1, T
2, T
3, T
4And T
1＇, T
2＇, T
3＇, T
4＇ is respectively each fuel burner nozzle at the unbalanced pulse of two pulse cycle in the cycle; Corresponding burner unbalanced pulse equates among Fig. 3, and corresponding burner unbalanced pulse does not wait among Fig. 4, and it is by each fuel burner nozzle pulse open-interval percentage
Decision.
This method can make full use of each fuel burner nozzle impulse jet momentum and open and close staggered sequential each other, realizes that air-flow is strengthened circulation, stirred in the burner hearth, and reinforced blank conducts heat, and improves temperature homogeneity in the burner hearth, thereby improves control of industrial furnace home.The each unlatching of fuel burner nozzle all is operated under declared working condition and the heating efficiency, effectively improves the fuel burn-off rate, reduces pollutant emission, realizes energy-saving and emission-reduction.Fuel burner nozzle is arranged in the heating furnace both sides makes stove-shaped structure greatly simplify, and the attended operation environment is good.Owing to realize single fire mouth or burner control in pairs, every or every pair of burner are respectively independently temperature controlled region, so Control for Kiln Temperature precision height, and the Control for Kiln Temperature flexibility is strong, especially for cold and hot load in mixture and special steel heating process advantage remarkable.
Claims (2)
1. the pulse-combustion control method of a heater for rolling steel comprises the PID controller of at least four fuel burner nozzles and heating furnace automatic control system it is characterized in that this method comprises the steps:
Step 1, along the furnace superintendent direction fuel burner nozzle Cheng Shuan is arranged in the heating furnace both sides and be positioned at the stove blank about, make heating furnace form full side and burn;
The pulse of step 2, all fuel burner nozzle opening and closing T finish in the time and with the T time be cycle period, also open successively by the interval T s time for each fuel burner nozzle, fuel burner nozzle quantity is Q, then at a pulse cycle Ts=T/Q or Ts=T/(Q/2 in the cycle);
Step 3, each fuel burner nozzle unbalanced pulse order can be adjusted, and each the unlatching all of each fuel burner nozzle opened with specified heating efficiency;
Step 4, the unbalanced pulse time of each fuel burner nozzle in each cycle period T are T
1, T
2T
Q, carry out computing according to the furnace temperature setting value with measured value by the PID controller of heating furnace automatic control system, and export each fuel burner nozzle pulse open-interval percentage in each cycle period T
,
In the formula: Kp, Ki, Kd are the adjustment constant of PID controller,
Be the fuel burner nozzle sequence number, e (t) is furnace temperature setting value and deviation of measuring value amount, and t is the sampling period of PID controller,
The pulse opening time percentage of each fuel burner nozzle in each cycle period T
Obtain the pulse opening time T of each fuel burner nozzle in each cycle period T mutually at convenience with cycle period T
1, T
2T
Q
2. the pulse-combustion control method of heater for rolling steel according to claim 1 is characterized in that: described cycle period T gets 0＜T≤300 second.
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|---|---|---|---|
| CN2011100769104A CN102221220A (en) | 2011-03-29 | 2011-03-29 | Pulse-combustion control method of steel rolling heating furnace |
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|---|---|---|---|
| CN2011100769104A CN102221220A (en) | 2011-03-29 | 2011-03-29 | Pulse-combustion control method of steel rolling heating furnace |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994732A (en) * | 2012-11-30 | 2013-03-27 | 中冶南方(武汉)威仕工业炉有限公司 | Fuel quantity deciding system for heating furnace and deciding method thereof |
| CN103557534A (en) * | 2013-11-11 | 2014-02-05 | 中冶南方工程技术有限公司 | High-precision pulse combustion control method of industrial furnace |
| CN103836642B (en) * | 2014-03-14 | 2016-01-20 | 江南大学 | A kind of gas furnace many burners pulse burning control technique method |
| CN105864819A (en) * | 2016-05-20 | 2016-08-17 | 大连大学 | Multi-fragment pulse combustion control system and method |
| CN106052410A (en) * | 2016-07-21 | 2016-10-26 | 江苏丰东热技术股份有限公司 | Pulse control method for multiple burning nozzles of heating furnace |
| CN108317866A (en) * | 2017-12-29 | 2018-07-24 | 武汉钢铁工程技术集团有限责任公司 | A kind of heating furnace pulse-control system and control method |
| CN109384370A (en) * | 2018-08-09 | 2019-02-26 | 长兴旗滨玻璃有限公司 | Glass melter natural gas burning system plays spray control method |
| CN106987704B (en) * | 2016-01-20 | 2019-04-23 | 宝山钢铁股份有限公司 | A kind of cold and hot process temperature control method for loading in mixture slab of pulse type heating furnace |
| CN110262592A (en) * | 2019-06-27 | 2019-09-20 | 中国铁建重工集团股份有限公司 | A kind of spring heating means, system, equipment and computer readable storage medium |
| CN111550822A (en) * | 2020-05-20 | 2020-08-18 | 宝钢湛江钢铁有限公司 | Method for controlling pulse combustion mode coal gas flow fluctuation |
| CN109189118B (en) * | 2018-08-27 | 2021-04-23 | 江苏丰东热技术有限公司 | Burner combustion control method and device |
| CN113847821A (en) * | 2020-06-28 | 2021-12-28 | 宝山钢铁股份有限公司 | Pulse control method for heating furnace burner and furnace temperature control method for pulse furnace |
| CN114840037A (en) * | 2022-05-24 | 2022-08-02 | 湖南顶立科技有限公司 | Temperature control method and system for steel belt furnace |
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| CN101737797A (en) * | 2010-01-12 | 2010-06-16 | 中冶东方工程技术有限公司 | Pulse combustion control system and control method |
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| CN101737797A (en) * | 2010-01-12 | 2010-06-16 | 中冶东方工程技术有限公司 | Pulse combustion control system and control method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102994732A (en) * | 2012-11-30 | 2013-03-27 | 中冶南方(武汉)威仕工业炉有限公司 | Fuel quantity deciding system for heating furnace and deciding method thereof |
| CN103557534A (en) * | 2013-11-11 | 2014-02-05 | 中冶南方工程技术有限公司 | High-precision pulse combustion control method of industrial furnace |
| CN103836642B (en) * | 2014-03-14 | 2016-01-20 | 江南大学 | A kind of gas furnace many burners pulse burning control technique method |
| CN106987704B (en) * | 2016-01-20 | 2019-04-23 | 宝山钢铁股份有限公司 | A kind of cold and hot process temperature control method for loading in mixture slab of pulse type heating furnace |
| CN105864819A (en) * | 2016-05-20 | 2016-08-17 | 大连大学 | Multi-fragment pulse combustion control system and method |
| CN106052410A (en) * | 2016-07-21 | 2016-10-26 | 江苏丰东热技术股份有限公司 | Pulse control method for multiple burning nozzles of heating furnace |
| CN108317866A (en) * | 2017-12-29 | 2018-07-24 | 武汉钢铁工程技术集团有限责任公司 | A kind of heating furnace pulse-control system and control method |
| CN109384370A (en) * | 2018-08-09 | 2019-02-26 | 长兴旗滨玻璃有限公司 | Glass melter natural gas burning system plays spray control method |
| CN109384370B (en) * | 2018-08-09 | 2021-07-16 | 长兴旗滨玻璃有限公司 | Glass melting furnace natural gas combustion system start-up control method |
| CN109189118B (en) * | 2018-08-27 | 2021-04-23 | 江苏丰东热技术有限公司 | Burner combustion control method and device |
| CN110262592A (en) * | 2019-06-27 | 2019-09-20 | 中国铁建重工集团股份有限公司 | A kind of spring heating means, system, equipment and computer readable storage medium |
| CN111550822A (en) * | 2020-05-20 | 2020-08-18 | 宝钢湛江钢铁有限公司 | Method for controlling pulse combustion mode coal gas flow fluctuation |
| CN113847821A (en) * | 2020-06-28 | 2021-12-28 | 宝山钢铁股份有限公司 | Pulse control method for heating furnace burner and furnace temperature control method for pulse furnace |
| CN113847821B (en) * | 2020-06-28 | 2023-10-17 | 宝山钢铁股份有限公司 | Pulse control method for heating furnace burner and furnace temperature control method for pulse furnace |
| CN114840037A (en) * | 2022-05-24 | 2022-08-02 | 湖南顶立科技有限公司 | Temperature control method and system for steel belt furnace |
| CN114840037B (en) * | 2022-05-24 | 2024-03-26 | 湖南顶立科技有限公司 | Temperature control method and system for steel belt furnace |
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Owner name: BAOSTEEL INDUSTRIAL FURNACE ENGINEERING TECHNOLOGY Free format text: FORMER OWNER: SHANGHAI BAOSTEEL INDUSTRY INSPECTION CORP. Effective date: 20130301 |
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Application publication date: 20111019 |