CN102296171A - Burner control method varying with heating load - Google Patents
Burner control method varying with heating load Download PDFInfo
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- CN102296171A CN102296171A CN2010102092391A CN201010209239A CN102296171A CN 102296171 A CN102296171 A CN 102296171A CN 2010102092391 A CN2010102092391 A CN 2010102092391A CN 201010209239 A CN201010209239 A CN 201010209239A CN 102296171 A CN102296171 A CN 102296171A
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Abstract
The invention provides a burner control method varying with heating load. The method comprises the following steps of: correspondingly calculating theoretical burner number according to a lifting state of a combustion load index when zonal combustion load is in a low load range of 15-25 percent; taking the maximum value between the actual burner number and the theoretical burner number when the combustion load index is increased; contrarily, taking the minimum value as a computable burner number; comparing the computable burner number with the actual burner number again, taking the minimum value and feeding into a burner number distribution unit to perform burner distribution; and instructing and controlling the burner number through an industrial network. Thus, the best ratio of combustion load and the burner number is realized, the combustion efficiency of the burner is improved, coal gas is more fully combusted, the exhaust emission is reduced, energy is saved, environmental pollution is reduced, the service cycle of an electromagnetic valve is prolonged, an annealing phenomenon is avoided, and equipment, personal safety and smooth production are guaranteed.
Description
Technical field
The invention belongs to automation field, relating in particular to a kind of cold rolled continuous annealing stove that is used for can be according to the method for heating load change dynamics control burning burner quantity.
Background technology
The burner of cold rolling mill continuous annealing furnace is when underload or during keeping warm mode, often because burning load is low excessively, cause gas flow variable valve opening degree too small, also can carry out temperature regulation although it is so, but because the aperture of the method for conciliation is too small, make near the gas pressure of burner low excessively, the as easy as rolling off a log flame spraying that causes is not gone out and is burnt near magnetic valve, both wasted the energy, hot exhaust gas can not in time be drained, had a strong impact on the work-ing life of magnetic valve, even cause the accidental damage of magnetic valve, the spare parts consumption and the occupation of capital of magnetic valve have not only been increased, and because the damage of magnetic valve, when making it to light a fire once more, coal gas very easily produces detonation, what influence was produced carries out smoothly, and personnel and device security are constituted a serious threat.
Summary of the invention
Purpose of the present invention is exactly for defects, provides a kind of simple, safe and reliable, can realize optimal air-fuel ratio according to the dynamic control combustion burner of heating load quantity, the method for avoiding magnetic valve to damage.
For this reason, the technical solution that the present invention taked is:
A kind of burner control method that changes with heating load, its specific procedure and step are:
Setting regions burning low-load range: regional lower limit burning load coefficient is 15%, and regional upper limit burning load coefficient is 25%;
When the zonal combustion load is between the upper and lower limit, judge the trend of load by logical operation:
Stove district programmable logic controller is subtracted each other when the burning load parameter of time burning load parameter of scanning and a upper circulation, rise as confirming as the burning load index greater than 0; If confirm the burning load index decreased less than 0; The counterlogic judged result adopts different formula theory of computation burner numbers;
When the burning load index rises, then:
Theoretical burner number=all burner numbers * zone load/lower limit burning load coefficient
When the burning load index decreased, then:
Theoretical burner number=all burner numbers * zone load/upper limit burning load coefficient
In the formula: the zone load is the percentage (%) of single district heating efficiency;
With using at present the actual burner quantity of burning and the theoretical burner number after the calculating to compare, for the situation that the burning load index rises, between actual burner number and theoretical burner number, get maximum, draw and calculate the burner number; Otherwise, for the situation of burning load index decreased, then get minimum of a value between two numbers as calculating the burner number;
The calculating burner number that obtains is compared with the actual burner number in scene again, choose minimum of a value;
The burner number of finally choosing is sent into stove district programmable logic controller burner quantity allocation units, carry out list district burner and distribute, each zone of instruction allows the burner number of burning, by industrial network burner controller is controlled.
Beneficial effect of the present invention is:
Because the present invention is according to truly reflecting each regional Actual combustion load in the continuous annealing furnace, definite burning load coefficient that is adopted, calculate, screening draws final burner quantity, and by stove district programmable logic controller each is distinguished burning burner and carry out dispensing and quantity control, realized the best proportioning of burning load and burner quantity, safe and reliable in the time of not only can ensureing the burner igniting, and can increase the efficiency of combustion of burner, make single burner be in the best combustion air-fuel ratio, make gas-fired more abundant, greatly reduced the exhaust emissions amount, saved the energy, reduced environmental pollution, solenoid valve for gas has also been played good protective action, prolong the life cycle of magnetic valve, reduced the spare part deposit and the occupation of capital; And burner that each burning is used can both guarantee to have enough gas pressures, avoided the generation of tempering phenomenon, guaranteed the direct motion of equipment, personnel safety and production.The present invention is simple, and convenient operation and control need not investment, just can be instantaneous results as long as change control program, has general popularizing value.
Embodiment
The present invention's burner control method with the heating load variation, its governing principle is: subregion control, treat with a certain discrimination; Need much burning loads, just use how many burners.Therefore, at first to carry out to the burning load of burner gas pressure and Gas Flow quantitative statistics under the different load, find out unsettled burning load zone according to statistics.Simultaneously, find out the critical point of smooth combustion load.
Next is setting regions burning low-load range: regional lower limit burning load coefficient is 15%, and regional upper limit burning load coefficient is 25%.In stove district programmable logic controller burner control program, add the dynamic control program of thermic load, and set burner combustion priority in each zone, the combustion order of burner is sorted, so that when burner combustion is regulated, carry out the burner distribution.
Be setting regions burning load scope once more: regional lower limit burning load coefficient is 15%, and regional upper limit burning load coefficient is 25%.When the zonal combustion load is between the upper and lower limit, judge the trend of load by logical operation.
Stove district programmable logic controller is subtracted each other when the burning load parameter of time burning load parameter of scanning and a upper circulation, rise as confirming as the burning load index greater than 0; If confirm the burning load index decreased less than 0; The counterlogic judged result adopts different formula theory of computation burner numbers;
When the burning load index rises, then:
Theoretical burner number=all burner numbers * zone load/lower limit burning load coefficient
When the burning load index decreased, then:
Theoretical burner number=all burner numbers * zone load/upper limit burning load coefficient
In the formula: the zone load is the percentage (%) of single district heating efficiency;
To use at present the actual burner quantity of burning and the theoretical burner number after the calculating to compare, because burning load needs burner quantity to increase when rising, therefore the situation that rises for the burning load index is got maximum between actual burner number and theoretical burner number, draw to calculate the burner number; Otherwise, for the situation of burning load index decreased, then get minimum of a value between two numbers as calculating the burner number.
The calculating burner number that obtains is compared with the actual burner number in scene again, choose minimum of a value.
The burner number of finally choosing is sent into stove district programmable logic controller burner quantity allocation units, carry out list district burner and distribute, each zone of instruction allows the burner number of burning, by industrial network burner controller is controlled.
Simultaneously, on man-machine interface, be shown as the preferred number that burner distributes, the high burner of preferred number is at first burnt, to detect the reliability that burner combustion quantity that stove district's programmable logic controller and Controlling System calculate is carried out.And, can guarantee that when underload the incendiary burner can guarantee the even heating of steel plate in burner hearth by disposing the burner preferred number of different positions.
Claims (1)
1. burner control method that changes with heating load is characterized in that specific procedure and step are:
At first, setting regions burning low-load range: regional lower limit burning load coefficient is 15%, and regional upper limit burning load coefficient is 25%;
When the zonal combustion load is between the upper and lower limit, judge the trend of load by logical operation:
Stove district programmable logic controller is subtracted each other when the burning load parameter of time burning load parameter of scanning and a upper circulation, rise as confirming as the burning load index greater than 0; If confirm the burning load index decreased less than 0; The counterlogic judged result adopts different formula theory of computation burner numbers;
When the burning load index rises, then:
Theoretical burner number=all burner numbers * zone load/lower limit burning load coefficient
When the burning load index decreased, then:
Theoretical burner number=all burner numbers * zone load/upper limit burning load coefficient
In the formula: the zone load is the percentage (%) of single district heating efficiency;
With using at present the actual burner quantity of burning and the theoretical burner number after the calculating to compare, for the situation that the burning load index rises, between actual burner number and theoretical burner number, get maximum, draw and calculate the burner number; Otherwise, for the situation of burning load index decreased, then get minimum of a value between two numbers as calculating the burner number;
The calculating burner number that obtains is compared with the actual burner number in scene again, choose minimum of a value;
The burner number of finally choosing is sent into stove district programmable logic controller burner quantity allocation units, carry out list district burner and distribute, each zone of instruction allows the burner number of burning, by industrial network burner controller is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102092391A CN102296171A (en) | 2010-06-25 | 2010-06-25 | Burner control method varying with heating load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102092391A CN102296171A (en) | 2010-06-25 | 2010-06-25 | Burner control method varying with heating load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102296171A true CN102296171A (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102092391A Pending CN102296171A (en) | 2010-06-25 | 2010-06-25 | Burner control method varying with heating load |
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| CN (1) | CN102296171A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238469A (en) * | 2016-09-07 | 2016-12-21 | 邯钢集团邯宝钢铁有限公司 | A kind of Heating Furnace Control method promoting slab length direction temperature homogeneity |
| 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 |
-
2010
- 2010-06-25 CN CN2010102092391A patent/CN102296171A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238469A (en) * | 2016-09-07 | 2016-12-21 | 邯钢集团邯宝钢铁有限公司 | A kind of Heating Furnace Control method promoting slab length direction temperature homogeneity |
| 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 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111228 |