CN102978331B - Control method for improving gas recovery of new OG (Oxygen Converter Gas Recovery) converter - Google Patents

Control method for improving gas recovery of new OG (Oxygen Converter Gas Recovery) converter Download PDF

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Publication number
CN102978331B
CN102978331B CN201210511937.6A CN201210511937A CN102978331B CN 102978331 B CN102978331 B CN 102978331B CN 201210511937 A CN201210511937 A CN 201210511937A CN 102978331 B CN102978331 B CN 102978331B
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gas
differential pressure
converter
content
fire door
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CN102978331A (en
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汪利峰
周卫民
邹涌泉
邓毅
周有为
韦磊
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CISDI Engineering Co Ltd
CISDI Shanghai Engineering Co Ltd
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CISDI Engineering Co Ltd
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Abstract

一种提高新OG转炉煤气回收的控制方法，其步骤如下：1）将炉口微差压的压力信号，环缝洗涤塔的位置信号以及除尘风机的转速反馈到PLC，2）煤气分析仪检测煤气中的含量和CO含量，含量不满足回收时煤气将在放散塔点燃放散；3）采用自寻最优的模式切换控制来调整炉口微差压，4）在煤气分析仪检测到煤气满足收集要求时，开始回收煤气；本发明一种提高新OG转炉煤气回收的控制方法将活动烟罩、环缝液压控制装置和除尘风机三者经过PLC协调控制，采用自寻最优的切换控制模式，快速的使吹炼过程中炉口微差压处于0～10Pa范围内和稳定状态，从而使转炉煤气中含量和CO含量在短时间内满足收集要求，达到提高转炉煤气回收量的目的。

A control method for improving the gas recovery of the new OG converter. The steps are as follows: 1) Feedback the pressure signal of the differential pressure at the furnace mouth, the position signal of the ring seam scrubber and the speed of the dust removal fan to the PLC, 2) Detection by the gas analyzer in gas CO content and CO content, when the content does not meet the recovery, the gas will be ignited and released in the release tower; 3) Use the self-seeking optimal mode switching control to adjust the differential pressure at the furnace mouth, 4) When the gas analyzer detects that the gas meets the collection requirements , began to recycle gas; a control method for improving the recovery of new OG converter gas in the present invention, the movable hood, the annular seam hydraulic control device and the dust removal fan are coordinated and controlled by PLC, and the self-seeking optimal switching control mode is adopted to quickly Keep the differential pressure at the furnace mouth in the range of 0-10Pa and a stable state during the blowing process, so that the converter gas content and CO content in a short time to meet the collection requirements, to achieve the purpose of increasing the amount of converter gas recovery.

Description

A kind of control method that improves new OG RECOVERY OF CONVERTER GAS
Technical field
The invention belongs to converter steelmaking field, relate to a kind of control method that improves new OG RECOVERY OF CONVERTER GAS.
Background technology
China is Iron and Steel Production big country, and coal gas of converter is very important secondary energy in Iron and Steel Production, and the current average yield of China's coal gas of converter is at 50-90Nm 3about/t, improves RECOVERY OF CONVERTER GAS amount, in Present Domestic iron and steel industry, under the situation is tense, can effectively reduce the production cost of steel-making, improves the utilization ratio of secondary energy, and can greatly improve the gross contamination emission of Iron and Steel Production.
The coal gas of converter of 1400 ℃～1600 ℃ producing during Converter Oxigen Blowing, under taking out of blower fan drawn, is cooled to below 900 ℃ through movable overskirt and carbonated drink flue, then enters spray column, carries out thick dedusting and further cooling and double fire extinguishing;
Then coal gas enters annular seam washing tower, and the gap of outer cone in annular seam washing tower relies on fire door differential pressure and smelts Operating condition adjustment, and coal gas carries out smart dedusting through this, and then sloughs macrobead water droplet through dehydration tower, enters blower fan;
Malleation after blower fan machine, according to gas quality and other condition, coal gas is by the continuous switching of three-way switch valve, or by diffusing chimney to airborne release, or by pipeline, send into gas chamber through water seal inverted valve and U-shaped water seal.
In reality in convertor steelmaking process, after one-time dedusting operation room is received blowing commencing signal, operator improve rotating speed to specified speed by dedusting fan, by adjusting the cone lifting of annular seam washing tower, control again the differential pressure of converter mouth, and just movable gas hood drops to low level and dedusting fan when specified speed and by adjustments, adjusts that the aperture of cone of annular seam washing tower is very difficult to be met at short notice fire door differential pressure and remain on steady state.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of control method that improves new OG RECOVERY OF CONVERTER GAS, this control method is coordinated movable gas hood, circumferential weld hydraulic control device and dedusting fan three to control through PLC, adopt from seeking optimum switching controls pattern, make fast in converting process fire door differential pressure within the scope of 0～10Pa and steady state, thereby make in coal gas of converter content and CO content meet collection requirement at short notice, reach the object that improves RECOVERY OF CONVERTER GAS amount.
In order to solve the problems of the technologies described above, a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention, its step is as follows:
1), before smelting starts, by the pressure signal of converter mouth differential pressure detecting,, the speed feedback of the position signal of annular seam washing tower and dedusting fan arrives PLC, the smallest limit position of covering to converter mouth falls in petticoat pipe;
2), at the smelting initial stage, gas analysis meter detects in coal gas
Figure DEST_PATH_481238DEST_PATH_IMAGE001
content and CO content, its content does not meet and reclaims requirement, and T-valve is in diffusing position, and water seal inverted valve is in the closed position, and coal gas is lighted and is diffused by diffusing tower;
3) along with the carrying out of smelting, PLC Real-time Collection fire door differential pressure, by PLC, adjust the aperture that circumferential weld hydraulic control device is controlled outer cone in annular seam washing tower, and adopt from seeking optimum switching controls pattern and adjust fire door differential pressure, certainly seek optimum switching controls mode process:
1. at t1 constantly, by PLC, gather the differential pressure P1 of fire door,
2. after dedusting fan PID debugging, at t2 constantly, by PLC, gathering fire door differential pressure is P2,
While being 3. switched to the fuzzy aperture control of two dimension of incremental, when at t3 constantly, by PLC, gathering fire door differential pressure is P3,
4. by the fuzzy aperture of two dimension of incremental, control after adjustment, at t4 constantly, by PLC, gathering fire door differential pressure is P4, and meets ,
A) when time, be switched to the fuzzy aperture of incremental two dimension and control to adjust fire door differential pressure,
B) when time, be switched to dedusting fan speed control by frequency variation and adjust fire door differential pressure;
4) smelting mid-term, when gas analysis meter detects in coal gas
Figure DEST_PATH_687780DEST_PATH_IMAGE001
when content and CO content meet collection requirement, in the situation that gas chamber allows, coal gas starts to reclaim, and now water seal inverted valve is in the closed position, and T-valve is in reclaiming position.
Further, in step 3), in described adjustment annular seam washing tower, the aperture of outer cone is made as 25%.
Further, in step 3), the fuzzy aperture control process of two dimension of described incremental: the rotating speed at dedusting fan is constant, according to the fuzzy aperture table of the two dimension of increment type, by PLC, control the gap that circumferential weld hydraulic control device is adjusted outer cone in annular seam washing tower, make fire door differential pressure reach set(ting)value, the fuzzy aperture expression formula of two dimension of increment type is:
Figure DEST_PATH_59856DEST_PATH_IMAGE005
Wherein annular seam washing tower aperture initial value is:
Figure DEST_PATH_943629DEST_PATH_IMAGE006
,
Figure DEST_PATH_373867DEST_PATH_IMAGE007
Figure DEST_PATH_275964DEST_PATH_IMAGE008
according to
Figure DEST_PATH_569673DEST_PATH_IMAGE009
with
Figure DEST_PATH_924431DEST_PATH_IMAGE010
value by inquiring about two-dimentional fuzzy aperture control table, obtain;
Figure DEST_PATH_93113DEST_PATH_IMAGE009
for fire door differential pressure setting pressure with actual elementary errors pressure
Figure DEST_PATH_314327DEST_PATH_IMAGE012
poor:
Figure DEST_PATH_421960DEST_PATH_IMAGE013
Figure DEST_PATH_125824DEST_PATH_IMAGE014
By deviation
Figure DEST_PATH_736934DEST_PATH_IMAGE009
be divided into 5 fuzzy sets as follows:
Figure DEST_PATH_638025DEST_PATH_IMAGE009
=negative large, negative little, zero, just little, honest={ NB, NS, ZO, PS, PB}
for fire door differential pressure setup pressure value
Figure DEST_PATH_477860DEST_PATH_IMAGE011
with actual differential pressure pressure
Figure DEST_PATH_943476DEST_PATH_IMAGE012
the velocity of variation of difference:
Figure DEST_PATH_15469DEST_PATH_IMAGE015
By deviation be divided into 5 fuzzy sets as follows:
Figure DEST_PATH_469343DEST_PATH_IMAGE010
=negative large, negative little, zero, just little, honest={ NB, NS, ZO, PS, PB}
By deviation
Figure DEST_PATH_712237DEST_PATH_IMAGE008
be divided into 7 fuzzy sets as follows:
=negative large, and in bearing, negative little, zero, just little, center, honest
={NB，NM，NS，ZO，PS，PM，PB}
Figure DEST_PATH_602887DEST_PATH_IMAGE017
,
Figure DEST_PATH_308675DEST_PATH_IMAGE018
for the quantizing factor of fuzzy controller, its calculation formula is:
Figure DEST_PATH_456891DEST_PATH_IMAGE019
，
Figure DEST_PATH_248129DEST_PATH_IMAGE020
Figure DEST_PATH_635598DEST_PATH_IMAGE021
,
Figure DEST_PATH_195893DEST_PATH_IMAGE022
maximum value for pressure divergence, deviation variation rate variation;
Figure DEST_PATH_515010DEST_PATH_IMAGE023
, for pressure divergence, deviation variation rate
The minimum value changing;
Figure DEST_PATH_987634DEST_PATH_IMAGE009
, domain after quantification is: and 10 ,-4,0,4,10}
domain be: 10 ,-7 ,-4,0,4,7,10}.
Further, in step 1), on described petticoat pipe, be provided with lifting control mechanism, described lifting control mechanism is controlled by PLC.
Further, in step 4), meet in the coal gas of described coal gas collection
Figure DEST_PATH_658284DEST_PATH_IMAGE001
content is <1.5% and CO content>=35%.
Beneficial effect of the present invention is:
A kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention is for coordinating movable gas hood, circumferential weld hydraulic control device and dedusting fan three to control through PLC, adopt from seeking optimum switching controls pattern, make at short notice in converting process fire door differential pressure within the scope of 0～10Pa and steady state, thereby make in coal gas of converter
Figure DEST_PATH_393415DEST_PATH_IMAGE001
content and CO content meet collection requirement at short notice, reach the object that improves RECOVERY OF CONVERTER GAS amount.
Accompanying drawing explanation
Fig. 1 is producer gas recovery structure schematic diagram in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention;
Fig. 2 is RECOVERY OF CONVERTER GAS control block diagram in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention;
Fig. 3 is coal-gas recovering schema in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention;
Fig. 4 is the fuzzy aperture control table of incremental circumferential weld two dimension in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention.
Reference numeral: 1-converter; 2-petticoat pipe; 3-flue; 4-spray column; 5-annular seam washing tower; 6-circumferential weld hydraulic control device; 7-water trap; 8-dedusting fan; 9-gas analysis meter; 10-T-valve; 11-water seal inverted valve; 12-diffusing tower; 13-gas chamber; 14-fire door differential pressure measuring device; 15-petticoat pipe apparatus for controlling of lifting; 16-PLC; 17-frequency transformer.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below the preferred embodiments of the present invention are described in detail.
Be illustrated in figure 1 producer gas recovery structure schematic diagram in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention; Be illustrated in figure 2 RECOVERY OF CONVERTER GAS control block diagram in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention; Be illustrated in figure 3 coal-gas recovering schema in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention; A kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention, its step is as follows:
1) before smelting, by the speed feedback of the position signal of the pressure signal of the converter detecting 1 fire door differential pressure, annular seam washing tower 5 and dedusting fan 8, to PLC16, petticoat pipe 2 is positioned at 1 mouthful of specified location of converter;
2), at the smelting initial stage, gas analysis meter 9 detects in coal gas
Figure DEST_PATH_928302DEST_PATH_IMAGE001
content and CO content, owing to just starting to smelt, in coal gas
Figure DEST_PATH_589221DEST_PATH_IMAGE001
content and CO content do not meet the condition reclaiming, and T-valve 10 is in diffusing position, and water seal inverted valve 11 is in the closed position, and coal gas will be lighted and diffuse at diffusing tower 12;
3) along with the carrying out of smelting, PLC16 Real-time Collection fire door differential pressure, the aperture of adjusting circumferential weld hydraulic control device 6 control annular seam washing tower 5 interior outer cone by PLC is 20～30%, the aperture initial set value of preferred described annular seam washing tower 5 is 25%, and adopt from seeking optimum switching controls pattern and adjust fire door differential pressure, certainly seek optimum switching controls mode process:
1. at t1 constantly, by PLC, gather the differential pressure P1 of fire door,
2. after dedusting fan PID debugging, at t2 constantly, by PLC, gathering fire door differential pressure is P2,
While being 3. switched to the fuzzy aperture control of two dimension of incremental, when at t3 constantly, by PLC, gathering fire door differential pressure is P3,
4. by the fuzzy aperture of two dimension of incremental, control after adjustment, at t4 constantly, by PLC, gathering fire door differential pressure is P4, and meets
Figure DEST_PATH_576769DEST_PATH_IMAGE002
,
A) when time, be switched to the fuzzy aperture of incremental two dimension and control to adjust fire door differential pressure;
B) when
Figure DEST_PATH_502054DEST_PATH_IMAGE004
time, be switched to dedusting fan 9 speed control by frequency variations and adjust fire door differential pressure;
4) smelting mid-term, at gas analysis meter, detect in coal gas
Figure DEST_PATH_599455DEST_PATH_IMAGE001
when content and CO content meet collection requirement, in the situation that gas chamber allows, coal gas starts to reclaim, and now water seal inverted valve starts to open, and after reaching position, T-valve turns to and reclaims position, preferably meets in the coal gas of described coal gas collection
Figure DEST_PATH_74298DEST_PATH_IMAGE001
content is <1.5% and CO content>=35%.
The present embodiment is controlled circumferential weld hydraulic control device and dedusting fan by PLC, adopts from seeking optimum switching controls pattern, makes at short notice in converting process fire door differential pressure within the scope of 0～10Pa and steady state, thereby makes in coal gas of converter
Figure DEST_PATH_168810DEST_PATH_IMAGE001
content and CO content meet collection requirement at short notice, reach the object that improves RECOVERY OF CONVERTER GAS amount.
As Fig. 4 is depicted as the fuzzy aperture control table of incremental circumferential weld two dimension in a kind of control method that improves new OG RECOVERY OF CONVERTER GAS of the present invention, the fuzzy aperture control process of two dimension of described incremental: the rotating speed at dedusting fan is constant, according to the fuzzy aperture table of the two dimension of increment type, by PLC, control the gap that circumferential weld hydraulic control device is adjusted outer cone in annular seam washing tower, make fire door differential pressure reach set(ting)value, the fuzzy aperture expression formula of two dimension of increment type is:
Figure DEST_PATH_412710DEST_PATH_IMAGE005
Wherein annular seam washing tower aperture initial value is:
Figure DEST_PATH_681011DEST_PATH_IMAGE006
,
Figure DEST_PATH_643151DEST_PATH_IMAGE007
;
Figure DEST_PATH_520846DEST_PATH_IMAGE008
according to
Figure DEST_PATH_556935DEST_PATH_IMAGE009
with
Figure DEST_PATH_245405DEST_PATH_IMAGE010
value by inquiring about two-dimentional fuzzy aperture control table, obtain;
Figure DEST_PATH_445574DEST_PATH_IMAGE009
for fire door differential pressure setting pressure
Figure DEST_PATH_612113DEST_PATH_IMAGE011
with actual elementary errors pressure
Figure DEST_PATH_82802DEST_PATH_IMAGE012
poor:
Figure DEST_PATH_942173DEST_PATH_IMAGE013
Figure DEST_PATH_364059DEST_PATH_IMAGE014
By deviation
Figure DEST_PATH_599868DEST_PATH_IMAGE009
be divided into 5 fuzzy sets as follows:
Figure DEST_PATH_922134DEST_PATH_IMAGE009
=negative large, negative little, zero, just little, honest={ NB, NS, ZO, PS, PB}
for fire door differential pressure setup pressure value
Figure DEST_PATH_861588DEST_PATH_IMAGE011
with actual differential pressure pressure
Figure DEST_PATH_369930DEST_PATH_IMAGE012
the velocity of variation of difference:
Figure DEST_PATH_809351DEST_PATH_IMAGE015
Figure DEST_PATH_10526DEST_PATH_IMAGE016
By deviation
Figure DEST_PATH_407003DEST_PATH_IMAGE010
be divided into 5 fuzzy sets as follows:
Figure DEST_PATH_719036DEST_PATH_IMAGE010
=negative large, negative little, zero, just little, honest={ NB, NS, ZO, PS, PB}
By deviation
Figure DEST_PATH_15894DEST_PATH_IMAGE008
be divided into 7 fuzzy sets as follows:
Figure DEST_PATH_387969DEST_PATH_IMAGE008
=negative large, and in bearing, negative little, zero, just little, center, honest
={NB，NM，NS，ZO，PS，PM，PB}
Figure DEST_PATH_271743DEST_PATH_IMAGE017
,
Figure DEST_PATH_325149DEST_PATH_IMAGE018
for the quantizing factor of fuzzy controller, its calculation formula is:
Figure DEST_PATH_227246DEST_PATH_IMAGE019
，
Figure DEST_PATH_22420DEST_PATH_IMAGE020
Figure DEST_PATH_377178DEST_PATH_IMAGE021
, maximum value for pressure divergence, deviation variation rate variation;
Figure DEST_PATH_803929DEST_PATH_IMAGE023
,
Figure DEST_PATH_767074DEST_PATH_IMAGE024
for pressure divergence, deviation variation rate
The minimum value changing;
Figure DEST_PATH_874708DEST_PATH_IMAGE009
,
Figure DEST_PATH_82966DEST_PATH_IMAGE010
domain after quantification is: and 10 ,-4,0,4,10}
Figure DEST_PATH_631759DEST_PATH_IMAGE008
domain be: 10 ,-7 ,-4,0,4,7,10}.
Further, in step 1), on described petticoat pipe, be provided with lifting control mechanism, described lifting control mechanism is controlled by PLC, by PLC, adjust the position of petticoat pipe, can make petticoat pipe and circumferential weld hydraulic control device and dedusting fan coordinate to control, reach and control better effect, can make in coal gas of converter at short notice content and CO content meet collection requirement at short notice, reach the object that improves RECOVERY OF CONVERTER GAS amount.
A kind of control device that improves new OG RECOVERY OF CONVERTER GAS amount of the present invention, comprise PLC16 and the converter 1 being connected successively, movable gas hood 2, flue 3, spray column 4, annular seam washing tower 5, water trap 6 and dedusting fan 8, dedusting fan 8 is connected with gas chamber 13 with diffusing tower 12 respectively, between petticoat pipe 2 and converter 1, be provided with the fire door differential pressure measuring device 14 being connected with PLC16, described petticoat pipe 2 is provided with the petticoat pipe apparatus for controlling of lifting 15 being connected with PLC16, annular seam washing tower 5 is provided with the circumferential weld hydraulic control device 6 being connected with PLC16, dedusting fan 8 is provided with the frequency transformer 17 being connected with PLC16, dedusting fan 2 outlets are provided with the gas analysis meter 9 being connected with PLC16, dedusting fan 2 and diffusing tower 12, on pipeline between between gas chamber 13, be provided with T-valve 10, T-valve 10 and and gas chamber 13 between pipeline on be provided with water seal inverted valve 11, by T-valve 10, diffuse or reclaim position and water seal inverted valve 11 in opening or closing condition, coal gas is collected and lighted and diffuse.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although by with reference to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, can to it, make various changes in the form and details, and not depart from the spirit and scope of the present invention that appended claims limits.

Claims (4)

1. improve a control method for new OG RECOVERY OF CONVERTER GAS, it is characterized in that: its step is as follows:
1), before smelting starts, by the pressure signal of converter mouth differential pressure detecting,, the speed feedback of the position signal of annular seam washing tower and dedusting fan arrives PLC, the smallest limit position of covering to converter mouth falls in petticoat pipe;
2), at the smelting initial stage, gas analysis meter detects the O in coal gas 2content and CO content, its content does not meet and reclaims requirement, and T-valve is in diffusing position, and water seal inverted valve is in the closed position, and coal gas is lighted and is diffused by diffusing tower;
3) along with the carrying out of smelting, PLC Real-time Collection fire door differential pressure, by PLC, adjust the aperture that circumferential weld hydraulic control device is controlled outer cone in annular seam washing tower, and adopt from seeking optimum switching controls pattern and adjust fire door differential pressure, certainly seek optimum switching controls mode process:
1. at t1 constantly, by PLC, gather the differential pressure P1 of fire door,
2. after dedusting fan PID debugging, at t2 constantly, by PLC, gathering fire door differential pressure is P2,
While being 3. switched to the fuzzy aperture control of two dimension of incremental, when at t3 constantly, by PLC, gathering fire door differential pressure is P3,
4. by the fuzzy aperture of two dimension of incremental, control after adjustment, at t4 constantly, by PLC, gathering fire door differential pressure is P4, and meets
Figure 2012105119376100001DEST_PATH_IMAGE001
,
A) when time, be switched to the fuzzy aperture of incremental two dimension and control to adjust fire door differential pressure,
B) when
Figure DEST_PATH_IMAGE003
time, be switched to dedusting fan speed control by frequency variation and adjust fire door differential pressure;
4) smelting mid-term, when gas analysis meter detects O in coal gas 2when content and CO content meet collection requirement, in the situation that gas chamber allows, coal gas starts to reclaim, and now water seal inverted valve is in the closed position, and T-valve is in reclaiming position;
In step 3), the fuzzy aperture control process of two dimension of described incremental: the rotating speed at dedusting fan is constant, according to the fuzzy aperture table of the two dimension of increment type, by PLC, control the gap that circumferential weld hydraulic control device is adjusted outer cone in annular seam washing tower, make fire door differential pressure reach set(ting)value, the fuzzy aperture expression formula of two dimension of increment type is:
Figure DEST_PATH_IMAGE004
Wherein annular seam washing tower aperture initial value is:
Figure DEST_PATH_IMAGE005
,
Figure DEST_PATH_IMAGE006
;
Figure DEST_PATH_IMAGE007
according to
Figure DEST_PATH_IMAGE008
with
Figure DEST_PATH_IMAGE009
value by inquiring about two-dimentional fuzzy aperture control table, obtain,
Figure 386379DEST_PATH_IMAGE008
for fire door differential pressure setting pressure with actual elementary errors pressure
Figure DEST_PATH_IMAGE011
poor:
Figure DEST_PATH_IMAGE012
Figure DEST_PATH_IMAGE013
By deviation
Figure 365837DEST_PATH_IMAGE008
be divided into 5 fuzzy sets as follows:
Figure 332525DEST_PATH_IMAGE008
=negative large, negative little, zero, just little, honest={ NB, NS, ZO, PS, PB}
for fire door differential pressure setup pressure value
Figure 479789DEST_PATH_IMAGE010
with actual differential pressure pressure
Figure 489202DEST_PATH_IMAGE011
the velocity of variation of difference:
Figure DEST_PATH_IMAGE015
By deviation
Figure 883799DEST_PATH_IMAGE009
be divided into 5 fuzzy sets as follows:
Figure 20382DEST_PATH_IMAGE009
=negative large, negative little, zero, just little, honest={ NB, NS, ZO, PS, PB}
By deviation be divided into 7 fuzzy sets as follows:
Figure 869576DEST_PATH_IMAGE007
=negative large, and in bearing, negative little, zero, just little, center, honest
={NB，NM，NS，ZO，PS，PM，PB}
Figure DEST_PATH_IMAGE016
,
Figure DEST_PATH_IMAGE017
for the quantizing factor of fuzzy controller, its calculation formula is:
，
Figure DEST_PATH_IMAGE019
Figure DEST_PATH_IMAGE020
,
Figure DEST_PATH_IMAGE021
maximum value for pressure divergence, deviation variation rate variation;
Figure DEST_PATH_IMAGE022
,
Figure DEST_PATH_IMAGE023
for pressure divergence, deviation variation rate
The minimum value changing;
Figure 18314DEST_PATH_IMAGE008
,
Figure 755326DEST_PATH_IMAGE009
domain after quantification is: and 10 ,-4,0,4,10}
Figure 216394DEST_PATH_IMAGE007
domain be: 10 ,-7 ,-4,0,4,7,10}.
2. the control method of the new OG RECOVERY OF CONVERTER GAS of raising as claimed in claim 1, is characterized in that: in step 3), in described adjustment annular seam washing tower, the aperture of outer cone is made as 25%.
3. the control method of the new OG RECOVERY OF CONVERTER GAS of raising as claimed in claim 1, is characterized in that: in step 1), on described petticoat pipe, be provided with lifting control mechanism, described lifting control mechanism is controlled by PLC.
4. the control method of the new OG RECOVERY OF CONVERTER GAS of raising as claimed in claim 1, is characterized in that: in step 4), meet O in the coal gas that described coal gas collects 2content is <1.5% and CO content>=35%.
CN201210511937.6A 2012-12-04 2012-12-04 Control method for improving gas recovery of new OG (Oxygen Converter Gas Recovery) converter Expired - Fee Related CN102978331B (en)

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