CN104180680B - Coordinated control method for regenerator temperature and furnace pressure of regenerative heating furnace - Google Patents
Coordinated control method for regenerator temperature and furnace pressure of regenerative heating furnace Download PDFInfo
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- CN104180680B CN104180680B CN201410454420.7A CN201410454420A CN104180680B CN 104180680 B CN104180680 B CN 104180680B CN 201410454420 A CN201410454420 A CN 201410454420A CN 104180680 B CN104180680 B CN 104180680B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 title abstract description 7
- 230000001172 regenerating effect Effects 0.000 title abstract 3
- 239000000779 smoke Substances 0.000 claims abstract description 48
- 235000019504 cigarettes Nutrition 0.000 claims description 94
- 239000003245 coal Substances 0.000 claims description 39
- 239000002802 bituminous coal Substances 0.000 claims description 24
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 238000005338 heat storage Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000036760 body temperature Effects 0.000 claims 1
- 239000004071 soot Substances 0.000 abstract 6
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a coordinated control method for regenerator temperature and furnace pressure of a regenerative heating furnace. The method can achieve coordinated control over regenerator temperature and furnace pressure of the regenerative heating furnace. The method comprises the steps that the opening degrees of valves of an air smoke exhaust fan, a soot exhaust fan and a smoke brake are adjusted according to furnace pressure, air and gas on different sections and the opening degrees of valves of regenerator temperature branch pipes, and therefore the purpose of furnace pressure stabilization is achieved; the opening degrees of the smoke valves of the regenerator temperature branch pipes are adjusted according to the adjusting margins of regenerators, and temperature balance of the regenerators is achieved; according to the mean value of the adjusting margins of the air smoke regenerator branch pipes and the soot regenerator branch pipes, the opening degrees of the valves of the air smoke exhaust fan and the soot exhaust fan are controlled, and coordination between the air smoke exhaust fan and the soot exhaust fan is achieved; according to the adjusting margins of the valves of the regenerator temperature branch pipes, regenerator temperature and the valves of the air smoke exhaust fan and the soot exhaust fan, the opening degrees of the valves of the air smoke exhaust fan, the soot exhaust fan and the smoke brake are adjusted, and coordinated control over regenerator temperature and furnace pressure is achieved.
Description
Technical field
The present invention relates to smelting and heating control technology field, more particularly, to a kind of recuperative heater regenerator temperature with
Furnace pressure control method for coordinating.
Background technology
In air gas double heat storage type heating technique due to having obvious power savings advantages, it is widely used in each iron and steel
The heater for rolling steel of enterprise.Recuperative heater adopts commutation type burner, using empty cigarette exhaust blower and coal smoke exhaust blower forced-ventilated
Flue gas heats to heat storage, has the advantages that high efficiente callback flue gas, high temperature preheating space gas and low NOx drainage.But in use
Still suffer from problems, such as recuperative heater adopts commutation type burner, cause air and the gas flow entering within burner hearth
Fluctuation larger, cause furnace pressure fluctuation big the problems such as；Regenerator temperature controls to adjust not in time, causes heat storage short life
Problem；Regenerator temperature causes furnace pressure change problem greatly when adjusting valve events；For meeting regenerator temperature and burner hearth pressure
Power requires to cause strong smoke exhaust fan and flue gas lock to coordinate the coordination control between the problem that controls and each heat storage Flue valve
Problem processed；The control of regenerator temperature and furnace pressure lies substantially in manual operation state, regenerator temperature span of control width,
It is difficult to accomplish real-time adjustment, flue gas heat utilization rate is low.
Energy supply for metallurgy in July, 2010 publishes in the paper of entitled " research of recuperative heater controling of the pressure of the oven mode " and adopts
Furnace body retrofit and the method increasing decision procedure between total regulating valve and arm regulating valve, when arm control valve opening 50%
When appearing above overtemperature, house steward's regulating valve no longer pressing force is adjusted, but is adjusted by manifold valve temperature, suitably turns down out
Degree.
The Chinese patent of Application No. 200910215722.8 proposes a kind of two flue heating furnace furnace pressure controlling parties
Method, the method controls side flue damper YE according to furnace pressure signal and then controls the aperture of side flue shutter,
Furnace pressure is obtained after furnace pressure signal being compensated according to difference signals before and after heat exchanger in the flue of heating furnace both sides
Signal, is controlled to opposite side flue damper YE, and then controls the aperture of opposite side flue shutter, realizes both sides cigarette
The Differential Control of road flashboard aperture.
There are the following problems for prior art：1., when arm regulating valve exceedes certain standing valve position, change house steward's regulating valve is not
Pressing force is adjusted again, and using being set to certain fixed value, its versatility is not strong, is difficult to meet the field working conditions of real-time change.
2., after arm valve body overtemperature, house steward's regulating valve no longer adjusts furnace pressure, but because stove tail pressure is adjusted still through adjusting blower fan
Section valve controls the control problem it is impossible to when fundamentally solution furnace pressure is larger, there is potential safety hazard.3. do not pacify because much live
Dress flue gas flow table, when adjusting flue gas arm valve cannot the change of Accurate Prediction furnace pressure making adjustment in time, meeting
Cause furnace pressure to have larger more frequently to fluctuate.
Content of the invention
For the problems referred to above, the main object of the present invention is to provide a kind of recuperative heater regenerator temperature and burner hearth pressure
The autocontrol method that power is coordinated.
For achieving the above object, the present invention takes technical scheme below：A kind of recuperative heater regenerator temperature and stove
Gun pressure power control method for coordinating, is provided with regenerator temperature and adjusts nargin mean value computation module, regenerator temperature regulation nargin calculating
Module, regenerator temperature arm valve adjustment module, empty bituminous coal cigarette exhaust blower coordinating control module, furnace pressure processing module,
Furnace pressure control module, empty bituminous coal cigarette exhaust blower cigarette lock coordinating control module, regenerator temperature arm valve, empty cigarette exhaust blower
Valve, coal smoke exhaust blower valve and cigarette gate and valve.
Described furnace pressure processing module output is as the input of described furnace pressure control module, described furnace pressure control
The output of molding block and each heat storage manifold valve present output, each section of gas valve aperture feedforward output and each section of air door in front of the door
Aperture feedforward output sum is adjusted to the aperture of empty cigarette exhaust blower valve, coal smoke exhaust blower valve, cigarette gate and valve, reaches steady
Determine the purpose of furnace pressure.
Described regenerator temperature adjusts the output of nargin mean value computation module and each described regenerator temperature adjusts nargin and calculates
Module exports the input as each described regenerator temperature arm valve adjustment module, described regenerator temperature arm valve regulated
The output of module is adjusted to the aperture of each described regenerator temperature arm valve, is assisted with the equilibrium realizing each regenerator temperature
Tune problem.
Described sky cigarette regenerator temperature adjusts nargin mean value computation and described coal smoke regenerator temperature adjusts nargin average meter
Calculate the input together as described sky bituminous coal cigarette exhaust blower coordinating control module, described sky bituminous coal cigarette exhaust blower coordinating control module
Output to described sky cigarette exhaust blower valve, described coal smoke exhaust blower valve, described cigarette gate and valve aperture be adjusted, realize
Coordination problem between empty cigarette exhaust blower and coal smoke exhaust blower.
Described sky cigarette exhaust blower valve regulated nargin and described coal smoke exhaust blower valve regulated nargin are together as described sky
The input of bituminous coal cigarette exhaust blower cigarette lock coordinating control module, the output of described sky bituminous coal cigarette exhaust blower cigarette lock coordinating control module is right
Described sky cigarette exhaust blower valve, described coal smoke exhaust blower valve, the aperture of described cigarette gate and valve are adjusted.
Nargin is adjusted by each regenerator temperature arm valve regulated nargin, regenerator temperature, empty cigarette exhaust blower aperture is adjusted
Section nargin and coal smoke exhaust blower aperture regulation nargin, the opening ratio to described sky bituminous coal cigarette exhaust blower valve and described cigarette gate and valve
Example is adjusted, and the coordination realizing furnace pressure with each regenerator temperature controls.
By setting the bound of each regenerator temperature, each described regenerator temperature adjusts nargin computing module and calculates currently
The regulation nargin of each regenerator temperature.
By the regulation nargin of each regenerator temperature, described regenerator temperature adjusts nargin mean value computation module and calculates accumulation of heat
Temperature adjusts nargin average.
Adjust the deviation of nargin average, each described heat storage by the regulation nargin of each regenerator temperature and regenerator temperature
Temperature arm valve adjustment module adjusts the valve opening of each described regenerator temperature arm valve.
Described furnace pressure processing module is output as furnace pressure currency, to described sky cigarette exhaust blower valve, described coal
Cigarette exhaust blower valve, described cigarette gate and valve are adjusted, meanwhile, each section of gas valve aperture feedforward, each section of air door aperture
Feedforward and the feedforward of heat storage arm valve opening are in advance to described sky cigarette exhaust blower valve, described coal smoke exhaust blower valve and described
Cigarette gate and valve is adjusted, to reach quick-adjustsing purpose.
Nargin average is adjusted by empty cigarette regenerator temperature and coal smoke regenerator temperature adjusts the difference of nargin average, described
Empty bituminous coal cigarette exhaust blower coordinating control module is carried out to the aperture of described sky cigarette exhaust blower valve and described coal smoke exhaust blower valve
Adjustment, adjustment amount is identical but effect is contrary, equilibrium with coal smoke regenerator temperature to coordinate empty cigarette regenerator temperature, simultaneously to negative
Pressure impact is minimum.
When empty cigarette exhaust blower valve regulated nargin and coal smoke exhaust blower valve regulated nargin reach high limit setting value, pass through
Described sky bituminous coal cigarette exhaust blower coordinating control module is to described cigarette gate and valve, described sky cigarette exhaust blower valve and described coal smoke air draft
Machine valve opening is adjusted, and two blower fan valve adjustment amounts are identical with cigarette gate and valve adjustment amount but effect is contrary, so that heat storage
Temperature reaches control targe, negative pressure is affected minimum simultaneously.
The invention has the advantages that：1st, normal the stablizing of furnace pressure when producing, is conducive to safety in production and stove
Interior burning steady, so that the generation of nitrogen oxides is effectively reduced；2nd, coordinate each regenerator temperature balance, be conducive to each heat storage to change
Thermal balance, extends the service life of heat storage；3rd, coordinate furnace pressure and regenerator temperature adjusts equilibrium it is ensured that exhaust gas volumn is stable
Reaching with regenerator temperature needs temperature, effectively utilizes flue gas heat, reduces energy expenditure；4th, furnace pressure and heat storage are realized
Temperature automatic adjustment controls, and effective heat storage reduced lifetime reducing because manual operation quality causes and fume afterheat be not using high
Problem, greatly reduce the labor intensity of workman meanwhile.
Brief description
Accompanying drawing 1 is control method for coordinating block diagram of the present invention.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, embodiment on certain procedure for steel rolling in metallurgical industry reheat furnace system for the control method for coordinating in the present invention,
The overall regenerator temperature that includes adjusts nargin mean value computation module, regenerator temperature regulation nargin computing module, regenerator temperature
Arm valve adjustment module, empty bituminous coal cigarette exhaust blower coordinating control module, furnace pressure processing module, furnace pressure control mould
Block, empty bituminous coal cigarette exhaust blower cigarette lock coordinating control module, regenerator temperature arm valve, empty cigarette exhaust blower valve, coal smoke air draft
Machine valve and cigarette gate and valve.
(1) regenerator temperature adjusts nargin computing module
If the soaking zone sky cigarette regenerator temperature upper limit is TH1, lower limit is TL1, and Current Temperatures are T1, and regulation nargin is T_
YD1；The soaking zone coal smoke regenerator temperature upper limit is TH2, and lower limit is TL2, and Current Temperatures are T2, and regulation nargin is T_YD2；Plus
The hot arc sky cigarette regenerator temperature upper limit is TH3, and lower limit is TL3, and Current Temperatures are T3, and regulation nargin is T_YD3；Bringing-up section coal smoke
The regenerator temperature upper limit is TH4, and lower limit is TL4, and Current Temperatures are T4, and regulation nargin is T_YD4,
Then each regenerator temperature regulation nargin is
T_YDi=(THi-Ti)/(THi-TLi), i value is 1,2,3,4.
(2) regenerator temperature adjusts nargin mean value computation module
If it is T_YD_AVG that regenerator temperature adjusts nargin average, then
T_YD_AVG=1/4 ∑ T_YDi, i value is 1,2,3,4.
(3) regenerator temperature arm valve adjustment module
Using pid control algorithm, with T_YD_AVG as setting value, with T_YDi as measured value, export valve position signal to arm
Valve T_av1, T_av2, T_av3, T_av4, wherein, in pid control algorithm, the span of parameter P is 50 ~ 80, parameter I
Span is 80 ~ 100, and the span of parameter D is 40 ~ 50.
(4) furnace pressure processing module
When change-over valve commutates, kept the furnace pressure value in a upper moment, and after commutation terminates, chose furnace pressure and survey
Value；If burner hearth commutation is masked as flag, burner hearth measured value P, the furnace pressure value after process is P_lt
If flag=false, P_lt=P.
(5) furnace pressure control module
Using pid control algorithm, if furnace pressure setting value is P_sp, with P_lt as measured value, furnace pressure module
It is output as P1_av, wherein in pid control algorithm, the span of parameter P is 100 ~ 120, the span of parameter I is 60 ~ 80,
The span of parameter D is 30 ~ 40.
(6) heat storage manifold valve is presented in front of the door
QK1_SP=when manually（∑T_avi）；QK1_PV=when automatically（∑T_avi）；
Heat storage manifold valve is presented in front of the door and is output as QK1_AV=K1* (QK1_PV-QK1_SP), wherein K1=-0.2.
(7) gas main valve opening feedforward
QK2_SP=when manually（FM1_AV+FM2_AV）；QK2_PV=when automatically（FM1_AV+FM2_AV）；
The feedforward of gas main valve opening is output as QK2_AV=K2* (QK2_PV-QK2_SP), wherein K2=0.4.
(8) air header valve opening feedforward
QK3_SP=when manually（FK1_AV+FK2_AV）；QK3_PV=when automatically（FK1_AV+FK2_AV）；
The feedforward of air header valve opening is output as QK3_AV=K3* (QK3_PV-QK3_SP), wherein K3=0.4.
(9) empty cigarette regenerator temperature adjusts nargin mean value computation
It is TK_YD_AVG=(T_YD1+ T_YD3)/2 that empty cigarette regenerator temperature adjusts nargin average.
(10) coal smoke regenerator temperature adjusts nargin mean value computation
It is TM_YD_AVG=(T_YD2+ T_YD4)/2 that coal smoke regenerator temperature adjusts nargin average.
(11) empty bituminous coal cigarette exhaust blower coordinating control module
Using pid control algorithm, empty bituminous coal cigarette exhaust blower coordinating control module is output as T_XT_AV, and desired value is 0, surveys
Value is the difference of TK_YD_AVG and TM_YD_AVG, and wherein, in pid control algorithm, the span of parameter P is 50 ~ 70, parameter I
Span be 120 ~ 150, the span of parameter D is 50 ~ 60.
(12) empty cigarette exhaust blower valve regulated nargin
If the empty cigarette exhaust blower valve opening upper limit is FKH, lower limit is FKL, and current aperture is FK, and regulation nargin is FK_YD,
Then empty cigarette exhaust blower valve regulated nargin is FK_YD=(FKH-FK)/(FKH-FKL).
(13) coal smoke exhaust blower valve regulated nargin
If the coal smoke exhaust blower valve opening upper limit is FMH, lower limit is FML, and current aperture is FM, and regulation nargin is FM_YD,
Then coal smoke exhaust blower valve regulated nargin is FM_YD=(FMH-FM)/(FMH-FML).
(14) empty bituminous coal cigarette exhaust blower cigarette lock coordinating control module
When FK_YD or FM_YD is 0, empty bituminous coal cigarette exhaust blower cigarette lock coordinating control module is output as P_XT_AV.
To sum up, empty cigarette exhaust blower valve opening FK_AV, coal smoke exhaust blower valve opening FM_AV, cigarette gate and valve aperture FY_
AV is respectively
FK_AV=P1_av+QK1_AV+ QK2_AV+ QK3_AV+ T_XT_AV+β*P_XT_AV；
FM_AV=P1_av+QK1_AV+ QK2_AV+ QK3_AV+α*T_XT_AV+β*P_XT_AV；
FY_AV=P1_av+QK1_AV+ QK2_AV+ QK3_AV+ T_XT_AV+ P_XT_AV；
Wherein, α=- 1, β=- 0.5.
Claims (3)
1. a kind of recuperative heater regenerator temperature and furnace pressure control method for coordinating are it is characterised in that be provided with accumulation of heat body temperature
Degree adjust nargin mean value computation module, regenerator temperature adjust nargin computing module, regenerator temperature arm valve adjustment module,
Empty bituminous coal cigarette exhaust blower coordinating control module, furnace pressure processing module, furnace pressure control module, empty bituminous coal cigarette exhaust blower cigarette
Lock coordinating control module, regenerator temperature arm valve, empty cigarette exhaust blower valve, coal smoke exhaust blower valve and cigarette gate and valve；
Described furnace pressure processing module output is as the input of described furnace pressure control module, described furnace pressure control mould
The output of block and each heat storage manifold valve present output, each section of gas valve aperture feedforward output and each section of air door aperture in front of the door
Feedforward output sum is adjusted to the aperture of described sky cigarette exhaust blower valve, described coal smoke exhaust blower valve, described cigarette gate and valve
Whole, reach the purpose of stable furnace pressure；
Described regenerator temperature adjusts the output of nargin mean value computation module and each described regenerator temperature adjusts nargin computing module
Output is as the input of each described regenerator temperature arm valve adjustment module, described regenerator temperature arm valve adjustment module
Output the aperture of each regenerator temperature arm valve is adjusted, to realize the equilibrium coordination problem of each regenerator temperature；
Described sky cigarette regenerator temperature adjusts nargin mean value computation and described coal smoke regenerator temperature adjusts nargin mean value computation one
Rise as described sky bituminous coal cigarette exhaust blower coordinating control module input, described sky bituminous coal cigarette exhaust blower coordinating control module defeated
Go out the aperture to empty cigarette exhaust blower valve, coal smoke exhaust blower valve, cigarette gate and valve to be adjusted, realize empty cigarette exhaust blower and coal smoke
Coordination problem between exhaust blower；
Described sky cigarette exhaust blower valve regulated nargin and described coal smoke exhaust blower valve regulated nargin are together as described sky bituminous coal
The input of cigarette exhaust blower cigarette lock coordinating control module, the output of described sky bituminous coal cigarette exhaust blower cigarette lock coordinating control module is to described
Empty cigarette exhaust blower valve, described coal smoke exhaust blower valve, the aperture of described cigarette gate and valve are adjusted；
Abundant by each regenerator temperature arm valve regulated nargin, regenerator temperature regulation nargin, empty cigarette exhaust blower aperture regulation
Degree and coal smoke exhaust blower aperture regulation nargin, enter to the aperture ratio of described sky bituminous coal cigarette exhaust blower valve and described cigarette gate and valve
Row adjustment, the coordination realizing furnace pressure with each regenerator temperature controls.
2. a kind of recuperative heater regenerator temperature and furnace pressure control method for coordinating as claimed in claim 1, it is special
Levy the bound being by setting each regenerator temperature, it is currently each that each described regenerator temperature adjusts the calculating of nargin computing module
The regulation nargin of regenerator temperature；By the regulation nargin of each regenerator temperature, described regenerator temperature adjusts nargin average meter
Calculate module and calculate regenerator temperature regulation nargin average；Adjusted abundant by the regulation nargin of each regenerator temperature and regenerator temperature
The deviation of degree average, each described regenerator temperature arm valve adjustment module adjusts the valve of each described regenerator temperature arm valve
Door aperture.
3. a kind of recuperative heater regenerator temperature and furnace pressure control method for coordinating as claimed in claim 1, it is special
Levy and be that described furnace pressure processing module is output as furnace pressure currency, to described sky cigarette exhaust blower valve, described coal smoke
Exhaust blower valve, described cigarette gate and valve are adjusted, and meanwhile, each section of gas valve aperture feedforward, before each section of air door aperture
Feedback and the feedforward of heat storage arm valve opening are in advance to described sky cigarette exhaust blower valve, described coal smoke exhaust blower valve and described cigarette
Gate and valve is adjusted；Described sky bituminous coal cigarette exhaust blower coordinating control module pass through empty cigarette regenerator temperature adjust nargin average with
Coal smoke regenerator temperature adjusts the difference of nargin average, and described sky cigarette exhaust blower valve and described coal smoke exhaust blower valve are opened
Degree is adjusted, and adjustment amount is identical but effect is contrary；When empty cigarette exhaust blower valve regulated nargin and coal smoke exhaust blower valve regulated
When nargin reaches high limit setting value, by described sky bituminous coal cigarette exhaust blower coordinating control module to described cigarette gate and valve, described sky
Cigarette exhaust blower valve and described coal smoke exhaust blower valve opening are adjusted, two blower fan valve adjustment amounts and cigarette gate and valve adjustment amount
Size is mated but effect is contrary.
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| CN201410454420.7A CN104180680B (en) | 2014-09-09 | 2014-09-09 | Coordinated control method for regenerator temperature and furnace pressure of regenerative heating furnace |
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| CN111780155A (en) * | 2020-07-21 | 2020-10-16 | 济源国泰自动化信息技术有限公司 | Control system and control method for high-efficiency combustion hot blast stove |
| CN112414155B (en) * | 2020-11-18 | 2022-07-05 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for calculating smoke gas amount of combined type steel rolling heating furnace |
| CN112665407B (en) * | 2020-12-15 | 2022-11-11 | 青岛新力通热工科技有限公司 | Hearth pressure control method for regenerative heating furnace |
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Application publication date: 20141203 Assignee: CHINA TECHNOLOGY EXCHANGE Co.,Ltd. Assignor: BEIJING HEROOPSYS TECHNOLOGY Co.,Ltd. Contract record no.: X2021980013172 Denomination of invention: A coordinated control method of regenerator temperature and furnace pressure of regenerative heating furnace Granted publication date: 20170222 License type: Exclusive License Record date: 20211124 |
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