CN107782165A - A kind of heating furnace air-fuel ratio regulation method - Google Patents
A kind of heating furnace air-fuel ratio regulation method Download PDFInfo
- Publication number
- CN107782165A CN107782165A CN201610785843.6A CN201610785843A CN107782165A CN 107782165 A CN107782165 A CN 107782165A CN 201610785843 A CN201610785843 A CN 201610785843A CN 107782165 A CN107782165 A CN 107782165A
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- China
- Prior art keywords
- fuel ratio
- air
- residual oxygen
- heating furnace
- value
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
- F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
- F27D2019/0015—Monitoring the composition of the exhaust gases or of one of its components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
- F27D2019/004—Fuel quantity
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Heat Treatment Processes (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The present invention relates to a kind of heating furnace air-fuel ratio regulation method, air-fuel ratio is adjusted according to residual oxygen value, furnace setpoint air-fuel ratio is 2：1, air-fuel ratio limit value：1.6~2.6；At 1.6~3.0, air-fuel ratio does not adjust residual oxygen value；As residual oxygen value ＜ 1.6, air-fuel ratio is incremented by with 0.05, and is delayed 30 seconds after incremental setting every time, and after being delayed 30 seconds, if residual oxygen fluctuates between 1.6~2.6, setting value is constant；Continue to continue to be incremented by by the principle for being incremented by 0.05 if still ＜ 1.6, untill residual oxygen value is incremented between 1.6~3.0.It is an advantage of the invention that：Residual oxygen value can be made to be maintained in rational scope, so as to reduce thermal loss and improve thermal efficiency of heating furnace by constantly adjusting air-fuel ratio.By using other intact residual oxygen instrument temporarily, it is ensured that the heating furnace air-fuel ratio normal regulating.
Description
Technical field
The present invention relates to a kind of heating furnace air-fuel ratio regulation method.
Background technology
The heating-furnace tail remaining oxygen of hot-strip needs to control within the specific limits, and ratio is too high to cause excessive air
Take away amount of heat, the too low imperfect combustion that can cause coal gas of ratio, reduce the thermal efficiency of heating furnace, therefore residual oxygen value needs
Control in a rational scope, at present, for the control of 2150 line heating furnace tails residual oxygen between 1.6-3%, operator can be with
The value shown according to residual oxygen instrument adjusts air-fuel ratio, and so as to adjust the ratio of residual oxygen, but operator can not accomplish constantly to adjust, tool
There are hysteresis quality and discontinuity.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of heating furnace air-fuel ratio regulation method, can and
When adjust air-fuel ratio, ensure residual oxygen in the reasonable scope, improve thermal efficiency of heating furnace.
To achieve the above object, the present invention is achieved through the following technical solutions：
A kind of heating furnace air-fuel ratio regulation method, air-fuel ratio is adjusted according to residual oxygen value, specifically includes following steps：
1) furnace setpoint air-fuel ratio is 2：1, air-fuel ratio limit value：1.6~2.6；Residual oxygen value is at 1.6~3.0, air-fuel
Than not adjusting；
2) as residual oxygen value ＜ 1.6, air-fuel ratio is incremented by with 0.05, and is delayed 30 seconds after incremental setting every time, is delayed
After 30 seconds, if residual oxygen fluctuates between 1.6~2.6, setting value is constant；Continue if still ＜ 1.6 by the principle for being incremented by 0.05
Continue to be incremented by, untill residual oxygen value is incremented between 1.6~3.0；
3) during residual oxygen value ＞ 3.0, air-fuel ratio is successively decreased by 0.03, and is delayed 30 seconds after setting of successively decreasing every time, delay 30
After second, if residual oxygen fluctuates between 1.6~3.0, setting value is constant；Continue to continue by 0.03 principle of successively decreasing if still ＞ 3.0
Successively decrease, untill residual oxygen value is decremented between 1.6-3.0.
Some heating furnaces used at the same time, every heating furnace are provided with a residual oxygen instrument, if certain residual oxygen instrument failure,
The heating furnace that this is detected is substituted using the air-fuel ratio of remaining heating furnace, i.e., is adjusted with the air-fuel ratio of remaining heating furnace.
Compared with prior art, the beneficial effects of the invention are as follows：
Residual oxygen value can be made to be maintained in rational scope by constantly adjusting air-fuel ratio, so as to reduce thermal loss and
Improve thermal efficiency of heating furnace.By using other intact residual oxygen instrument temporarily, it is ensured that the heating furnace air-fuel ratio normal regulating.
Brief description of the drawings
Fig. 1 is embodiment control schematic diagram.
Embodiment
The present invention is described in detail with reference to Figure of description, it should be noted that the implementation of the present invention is unlimited
In following embodiment.
Heating furnace air-fuel ratio regulation method, air-fuel ratio is adjusted according to residual oxygen value, specifically includes following steps：
1) furnace setpoint air-fuel ratio is 2：1, air-fuel ratio limit value：1.6~2.6；Residual oxygen value is at 1.6~3.0, air-fuel
Than not adjusting；
2) as residual oxygen value ＜ 1.6, air-fuel ratio is incremented by with 0.05, and is delayed 30 seconds after incremental setting every time, is delayed
After 30 seconds, if residual oxygen fluctuates between 1.6~2.6, setting value is constant；Continue if still ＜ 1.6 by the principle for being incremented by 0.05
Continue to be incremented by, untill residual oxygen value is incremented between 1.6~3.0；
3) during residual oxygen value ＞ 3.0, air-fuel ratio is successively decreased by 0.03 principle, and is delayed 30 seconds after setting of successively decreasing every time,
After delay 30 seconds, if residual oxygen fluctuates between 1.6~3.0, setting value is constant；Continue if still ＞ 3.0 by 0.03 original of successively decreasing
Then continue to successively decrease, untill residual oxygen value is decremented between 1.6-3.0.
Some heating furnaces used at the same time, every heating furnace are provided with a residual oxygen instrument, if certain residual oxygen instrument failure,
Substituted, i.e., be adjusted with the air-fuel ratio of remaining heating furnace using the air-fuel ratio of remaining heating furnace.
Embodiment
The line of hot-strip 2150 shares three heating furnaces, and every heating furnace installs a residual oxygen instrument, but in actual production
Be likely to occur certain residual oxygen instrument failure or because other reasons and caused by certain heating furnace residual oxygen examine indeterminacy phenomenon, should now use
The air-fuel ratio of other stoves substitutes, i.e., is automatically adjusted with the air-fuel ratio of other stoves.
See Fig. 1, when selecting 1# stove main control ON, 2# stove main control ON, 3# stove main control ON respectively, three stove air-fuel scores
Air-fuel ratio regulation is not carried out according to the residual oxygen value of respective stove.
When selecting 1# stove main control ON and 2# stove ON or 3# stove ON below, now the air-fuel ratio of 2# stoves or 3# stoves is equal
The air-fuel ratio adjusted with the main control of 1# stoves is adjusted, 2# and 3# stoves are also controlled using such a mode.
During specific regulation, air-fuel ratio is adjusted according to residual oxygen value, comprised the following steps：
1) furnace setpoint air-fuel ratio is 2：1, air-fuel ratio limit value：1.6~2.6；Residual oxygen value is at 1.6~3.0, air-fuel
Than without adjustment, heating furnace normal work；
2) as residual oxygen value ＜ 1.6, air-fuel ratio is incremented by with 0.05, after being incremented by 30 seconds, residual oxygen value is observed, if residual oxygen exists
Fluctuated between 1.6~2.6, then setting value is constant；Continue to continue to be incremented by by the principle for being incremented by 0.05 if still ＜ 1.6, delay 30
Second, the residual oxygen value of detection is observed, untill residual oxygen value is incremented between 1.6~3.0；
3) during residual oxygen value ＞ 3.0, air-fuel ratio is successively decreased by 0.03, and is delayed 30 seconds after setting of successively decreasing every time, delay 30
After second, if residual oxygen fluctuates between 1.6~3.0, setting value is constant；Continue to continue by 0.03 principle of successively decreasing if still ＞ 3.0
Successively decrease, untill residual oxygen value is decremented between 1.6-3.0.
In actual production：
When residual oxygen value is 1.4, air-fuel ratio is incremented by with 0.05, after being incremented by 30 seconds, observes residual oxygen value, now residual oxygen value is
1.5, air-fuel ratio is incremented by with 0.05, after 30 seconds, observes residual oxygen value, now residual oxygen value 1.7, then the air-fuel ratio 2 set:1 is not
Become.
Observe residual oxygen value for 3.1 when, air-fuel ratio is successively decreased by 0.03, and residual oxygen value is observed after 30 seconds, now residual oxygen value be 2.9,
The air-fuel ratio 2 of setting:1 is constant.
The present invention can be such that residual oxygen value is maintained in rational scope, so as to reduce heat by constantly adjusting air-fuel ratio
Loss and raising thermal efficiency of heating furnace.By using other intact residual oxygen instrument temporarily, it is ensured that the heating furnace air-fuel ratio normal regulating.
Claims (2)
- A kind of 1. heating furnace air-fuel ratio regulation method, it is characterised in that air-fuel ratio is adjusted according to residual oxygen value, specifically include with Lower step：1) furnace setpoint air-fuel ratio is 2：1, air-fuel ratio limit value：1.6~2.6；For residual oxygen value at 1.6~3.0, air-fuel ratio is not Adjustment；2) as residual oxygen value ＜ 1.6, air-fuel ratio is incremented by with 0.05, and is delayed 30 seconds after incremental setting every time, is delayed 30 seconds Afterwards, if residual oxygen fluctuates between 1.6~2.6, setting value is constant；Continue to continue by the principle for being incremented by 0.05 if still ＜ 1.6 It is incremented by, untill residual oxygen value is incremented between 1.6~3.0；3) during residual oxygen value ＞ 3.0, air-fuel ratio is successively decreased by 0.03, and is delayed 30 seconds after setting of successively decreasing every time, after being delayed 30 seconds, If residual oxygen fluctuates between 1.6~3.0, setting value is constant；Continue to continue to successively decrease by 0.03 principle of successively decreasing if still ＞ 3.0, Untill residual oxygen value is decremented between 1.6-3.0.
- A kind of 2. heating furnace air-fuel ratio regulation method according to claim 1, it is characterised in that it is used at the same time it is some plus Hot stove, every heating furnace are provided with a residual oxygen instrument, if certain residual oxygen instrument failure, the heating furnace that this is detected use it The air-fuel ratio of remaining heating furnace substitutes, i.e., is adjusted with the air-fuel ratio of remaining heating furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785843.6A CN107782165B (en) | 2016-08-31 | 2016-08-31 | Air-fuel ratio adjusting method for heating furnace |
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| CN201610785843.6A CN107782165B (en) | 2016-08-31 | 2016-08-31 | Air-fuel ratio adjusting method for heating furnace |
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| CN107782165A true CN107782165A (en) | 2018-03-09 |
| CN107782165B CN107782165B (en) | 2020-01-07 |
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| CN201610785843.6A Active CN107782165B (en) | 2016-08-31 | 2016-08-31 | Air-fuel ratio adjusting method for heating furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325327A (en) * | 2020-10-14 | 2021-02-05 | 首钢京唐钢铁联合有限责任公司 | Proportional control type burner residual oxygen amount correction method and device |
| CN112325328A (en) * | 2020-10-14 | 2021-02-05 | 首钢京唐钢铁联合有限责任公司 | Residual oxygen amount control method and device for non-direct-fired annealing furnace |
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| DE2630746A1 (en) * | 1975-07-08 | 1977-02-03 | Nissan Motor | OXYGEN SENSOR DEVICE |
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| DE2630746A1 (en) * | 1975-07-08 | 1977-02-03 | Nissan Motor | OXYGEN SENSOR DEVICE |
| CN101684944A (en) * | 2008-09-28 | 2010-03-31 | 宝山钢铁股份有限公司 | Self-optimizing combustion control method of blast-furnace hot blast stove |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325327A (en) * | 2020-10-14 | 2021-02-05 | 首钢京唐钢铁联合有限责任公司 | Proportional control type burner residual oxygen amount correction method and device |
| CN112325328A (en) * | 2020-10-14 | 2021-02-05 | 首钢京唐钢铁联合有限责任公司 | Residual oxygen amount control method and device for non-direct-fired annealing furnace |
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| CN107782165B (en) | 2020-01-07 |
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