CN107245570A - A kind of cold rolled annealed stove heat combination control method - Google Patents
A kind of cold rolled annealed stove heat combination control method Download PDFInfo
- Publication number
- CN107245570A CN107245570A CN201710596739.7A CN201710596739A CN107245570A CN 107245570 A CN107245570 A CN 107245570A CN 201710596739 A CN201710596739 A CN 201710596739A CN 107245570 A CN107245570 A CN 107245570A
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- Prior art keywords
- stove
- control
- value
- burner
- air
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
Abstract
The invention belongs to cold rolled annealed stove heat control technology field, and in particular to a kind of cold rolled annealed stove heat combination control method.The cold rolled annealed stove heat combination control method, stove automated procedures contrast belt steel temperature setting value with plate temperature meter temperature feedback value, calculated by mathematical modeling, if setting value is higher than value of feedback, the then reduction of furnace temperature setting value, stove power drop, it is on the contrary, furnace temperature setting value is raised, and stove power is improved, and the switching value of proportion adjustment/Pulse Width Control switch is the 65% of stove general power.Its advantage is：Two kinds of combustion control modes are combined by stove automation control system, learnt from other's strong points to offset one's weaknesses, the thermal efficiency of stove has both been improved, the service life of magnetic valve is improved again.
Description
Technical field
The invention belongs to cold rolled annealed stove heat control technology field, and in particular to a kind of cold rolled annealed stove heat combination control
Method processed.
Background technology
The combustion control mode of annealing furnace directly influences the indices of production, for example：Product quality, energy resource consumption
Deng.The general all adoption rates regulation control mode of annealing furnace domestic in the past, i.e., by control coal gas, combustion air flow it is big
It is small the temperature in stove, combustion atmosphere is reached technological requirement.Because this proportion adjustment control mode suffers from The fuel stream
The restriction of the link such as the regulation of amount and the reliability of sensor, especially when stove general power is less than 65%, one side burner flame
Length shortens, and being heated evenly property of radiant tube is deteriorated, and another aspect air-fuel ratio can increase, and influences furnace efficiency, so most of
The control effect of stove is not good.With the fast development of industrial furnace industry, pulsed combustion control technology was occurred in that later, it is so-called
Pulse burning control technique, that is, use a kind of mode of intermittent burning, using pulse modulation technology, by adjusting burning time
Dutycycle realizes the temperature control of stove.Fuel flow rate can be preset by pressure adjustment, and burner is at full once working
Load condition, is greatly improved the thermal efficiency of stove.But it has the disadvantage that the switching of valve break-make is frequent, influences valve service life.
Therefore searching can improve furnace thermal efficiency can reduce the key technology in the critical component life-span such as valve again, be always major stoves
The direction of producer's research.
The combustion control mode of current annealing furnace has two kinds, and one kind is proportion adjustment control, and it has the disadvantage stove general power
When relatively low, burn insufficient, influence furnace thermal efficiency；Another is pulse burning control technique, and it has the disadvantage valve break-make switching frequency
It is numerous, influence valve service life；The present invention combines two kinds of combustion control modes, is combination with the 65% of stove general power
Control switching point (CSP), can improve furnace thermal efficiency can reduce the service life of the critical components such as valve again.
The content of the invention
There is provided a kind of cold rolled annealed stove heat combination control method for the defect that makes up prior art by the present invention.
The present invention is achieved through the following technical solutions：
Belt steel temperature setting value and plate temperature are counted temperature by a kind of cold rolled annealed stove heat combination control method, stove automated procedures
Value of feedback is contrasted, and is calculated by mathematical modeling, and such as setting value is higher than value of feedback, then furnace temperature setting value is reduced, stove power
Decline, conversely, furnace temperature setting value is raised, stove power is improved, the switching value of proportion adjustment/Pulse Width Control switch is total for stove
The 65% of power, specifically includes following steps：
（1）When stove general power is below 65%, switch points to Impulsive control mode, is now single control pattern, i.e., each
Burner can be with independent control, and burner is burnt in maximum efficiency with 1.05 air-fuel ratio all the time, and burner is opened and closed by magnetic valve.Arteries and veins
When rushing control model, burner is lighted and closed successively with certain sequential；
（2）When stove general power is to more than 65%, switch goes to proportion adjustment control model, is now Region control, even
Dry burner composition is a region, is uniformly controlled by a combustion air ratio adjusting valve and a gas proportion regulating valve.
Combustion air and the air-fuel ratio of combustion gas are always 1.05 on zone duct, the opening degree of burner power adjusting passing ratio regulating valve
To realize.In proportion adjustment control model, in order to be always ensured that the oxygen-excess combustion of combustion gas, to combustion gas and the control of air mass flow
Using the control technology of cross limiting range, when load increase, gas consumption adjusting valve is driven with air mass flow detected value；Air
Flow directly increases, but gas flow must be when that could increase after air mass flow detected value increase.When load is reduced, with combustion
Air-flow detection values drive air flow rate adjustment valve；Gas flow is directly reduced, but air mass flow must wait until gas flow
Detected value could reduce after reducing.
Further, 7 control zones are divided into the stove, each region is made up of several burners, when use ratio is adjusted
During section pattern, stove program is controlled in units of region；When pulsed, controlled in units of single burner
System.
The beneficial effects of the invention are as follows：A kind of cold rolled annealed stove heat combination control method of the present invention is automated by stove
Control system combines two kinds of combustion control modes, learns from other's strong points to offset one's weaknesses, and has both improved the thermal efficiency of stove, electromagnetism is improved again
The service life of valve.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Accompanying drawing 1 is burner pulsed operation timing diagram of the invention；
Accompanying drawing 2 is proportion adjustment control flow chart of the present invention.
Embodiment
Accompanying drawing 1,2 is a kind of specific embodiment of the invention.A kind of cold rolled annealed stove heat combination control method of the invention,
Stove automated procedures contrast belt steel temperature setting value with plate temperature meter temperature feedback value, are calculated by mathematical modeling, such as
Setting value is higher than value of feedback, then furnace temperature setting value is reduced, stove power drop, conversely, furnace temperature setting value is raised, stove power is carried
Height, the switching value of proportion adjustment/Pulse Width Control switch is the 65% of stove general power, specifically includes following steps：
（1）When stove general power is below 65%, switch points to Impulsive control mode, is now single control pattern, i.e., each
Burner can be with independent control, and burner is burnt in maximum efficiency with 1.05 air-fuel ratio all the time, and burner is opened and closed by magnetic valve.Arteries and veins
When rushing control model, burner is lighted and closed successively with certain sequential；
（2）When stove general power is to more than 65%, switch goes to proportion adjustment control model, is now Region control, even
Dry burner composition is a region, is uniformly controlled by a combustion air ratio adjusting valve and a gas proportion regulating valve.
Combustion air and the air-fuel ratio of combustion gas are always 1.05 on zone duct, the opening degree of burner power adjusting passing ratio regulating valve
To realize.In proportion adjustment control model, in order to be always ensured that the oxygen-excess combustion of combustion gas, to combustion gas and the control of air mass flow
Using the control technology of cross limiting range, when load increase, gas consumption adjusting valve is driven with air mass flow detected value；Air
Flow directly increases, but gas flow must be when that could increase after air mass flow detected value increase.When load is reduced, with combustion
Air-flow detection values drive air flow rate adjustment valve；Gas flow is directly reduced, but air mass flow must wait until gas flow
Detected value could reduce after reducing.
Application example shows that annealing furnace is with such a heating combination control method, with using a kind of control model merely（Ratio
Adjust control model/Impulsive control mode）Compare, the thermal efficiency improves 20%, and the magnetic valve life-span improves 10%.
This invention control stability is high, program is simple, easily safeguards, one time cost of investment is low, and energy-conservation can be widely applied to
Metallurgy industry heating furnace field, is easy to promote in big production.
The present invention is not limited to the above-described embodiments, anyone should learn the present invention enlightenment under make with the present invention
With same or like technical scheme, each fall within protection scope of the present invention.
The technology of the invention not being described in detail, shape, construction part are known technology.
Claims (2)
1. a kind of cold rolled annealed stove heat combination control method, it is characterised in that stove automated procedures set belt steel temperature
Value is contrasted with plate temperature meter temperature feedback value, is calculated by mathematical modeling, such as setting value is higher than value of feedback, then furnace temperature setting value
Reduction, stove power drop, conversely, furnace temperature setting value is raised, stove power is improved, proportion adjustment/Pulse Width Control switch
Switching value is the 65% of stove general power, is comprised the following steps：（1）When stove general power is below 65%, switch points to arteries and veins
Control model is rushed, is now single control pattern, i.e., each burner can be with independent control, and burner is maximum with 1.05 air-fuel ratio all the time
Efficient burn, burner is opened and closed by magnetic valve, during Impulsive control mode, burner is lighted and closed successively with certain sequential；
（2）When stove general power is to more than 65%, switch goes to proportion adjustment control model, is now Region control, even
Dry burner composition is a region, is uniformly controlled by a combustion air ratio adjusting valve and a gas proportion regulating valve；
On zone duct combustion air and the air-fuel ratio of combustion gas are always 1.05, and burner power adjusting passing ratio regulating valve is opened
Mouth degree is realized, in proportion adjustment control model, in order to be always ensured that the oxygen-excess combustion of combustion gas, to combustion gas and air mass flow
Control, when load increase, gas consumption adjusting valve is driven with air mass flow detected value using the control technology of cross limiting range；
Air mass flow directly increases, but gas flow must be when that could increase after air mass flow detected value increase；When load is reduced,
Air flow rate adjustment valve is driven with gas flow detected value；Gas flow is directly reduced, but air mass flow must wait until combustion gas
Flow detection value could reduce after reducing.
2. according to a kind of cold rolled annealed stove heat combination control method of claim 1, it is characterised in that be divided into 7 in the stove
Individual control zone, each region is made up of several burners, and when use ratio shaping modes, stove program is entered in units of region
Row control；When pulsed, it is controlled in units of single burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710596739.7A CN107245570A (en) | 2017-07-20 | 2017-07-20 | A kind of cold rolled annealed stove heat combination control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710596739.7A CN107245570A (en) | 2017-07-20 | 2017-07-20 | A kind of cold rolled annealed stove heat combination control method |
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| CN107245570A true CN107245570A (en) | 2017-10-13 |
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| CN201710596739.7A Pending CN107245570A (en) | 2017-07-20 | 2017-07-20 | A kind of cold rolled annealed stove heat combination control method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108277337A (en) * | 2018-02-27 | 2018-07-13 | 首钢京唐钢铁联合有限责任公司 | A kind of vertical continuous annealing furnace control method |
| CN108977649A (en) * | 2018-08-01 | 2018-12-11 | 首钢智新迁安电磁材料有限公司 | A kind of environment protection control method of natural gas annealing furnace |
| CN110343847A (en) * | 2019-08-16 | 2019-10-18 | 黄石山力科技股份有限公司 | Method for controlling furnace temperature and annealing furnace |
| CN110714116A (en) * | 2019-11-05 | 2020-01-21 | 山东钢铁集团日照有限公司 | Method for stopping in thin-specification strip steel annealing furnace for rapid production recovery |
| CN111534682A (en) * | 2020-04-30 | 2020-08-14 | 首钢京唐钢铁联合有限责任公司 | Pulse type heating furnace air-fuel ratio control method and device based on flow control |
| CN114410957A (en) * | 2022-01-27 | 2022-04-29 | 山东钢铁集团日照有限公司 | Annealing furnace burner control method |
Citations (2)
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| CN101344264A (en) * | 2008-08-22 | 2009-01-14 | 武汉理工大学 | Mixed combustion control system of oxygen-enriched and full-oxygen combustion ceramic roller kiln |
| CN202511322U (en) * | 2012-05-02 | 2012-10-31 | 华美洁具有限公司 | Combustion control device for shuttle kiln |
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2017
- 2017-07-20 CN CN201710596739.7A patent/CN107245570A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101344264A (en) * | 2008-08-22 | 2009-01-14 | 武汉理工大学 | Mixed combustion control system of oxygen-enriched and full-oxygen combustion ceramic roller kiln |
| CN202511322U (en) * | 2012-05-02 | 2012-10-31 | 华美洁具有限公司 | Combustion control device for shuttle kiln |
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| 罗诚: "燃烧控制技术在退火炉中的应用", 《四川冶金》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108277337A (en) * | 2018-02-27 | 2018-07-13 | 首钢京唐钢铁联合有限责任公司 | A kind of vertical continuous annealing furnace control method |
| CN108977649A (en) * | 2018-08-01 | 2018-12-11 | 首钢智新迁安电磁材料有限公司 | A kind of environment protection control method of natural gas annealing furnace |
| CN108977649B (en) * | 2018-08-01 | 2020-06-26 | 首钢智新迁安电磁材料有限公司 | Environment-friendly control method of natural gas annealing furnace |
| CN110343847A (en) * | 2019-08-16 | 2019-10-18 | 黄石山力科技股份有限公司 | Method for controlling furnace temperature and annealing furnace |
| CN110343847B (en) * | 2019-08-16 | 2021-03-26 | 黄石山力科技股份有限公司 | Furnace temperature control method and annealing furnace |
| CN110714116A (en) * | 2019-11-05 | 2020-01-21 | 山东钢铁集团日照有限公司 | Method for stopping in thin-specification strip steel annealing furnace for rapid production recovery |
| CN110714116B (en) * | 2019-11-05 | 2020-12-15 | 山东钢铁集团日照有限公司 | Method for stopping in thin-specification strip steel annealing furnace for rapid production recovery |
| CN111534682A (en) * | 2020-04-30 | 2020-08-14 | 首钢京唐钢铁联合有限责任公司 | Pulse type heating furnace air-fuel ratio control method and device based on flow control |
| CN114410957A (en) * | 2022-01-27 | 2022-04-29 | 山东钢铁集团日照有限公司 | Annealing furnace burner control method |
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Address after: 276800 Shandong Province, Rizhao City Arashiyama District Shugang Avenue Applicant after: SHANDONG IRON AND STEEL GROUP RIZHAO CO., LTD. Address before: 276800 Ji'nan Road, Donggang District, Shandong, No. 396, No. Applicant before: SHANDONG IRON AND STEEL GROUP RIZHAO CO., LTD. |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20171013 |