CN104120212B - The new OG control method of a kind of converter dust-removing - Google Patents
The new OG control method of a kind of converter dust-removing Download PDFInfo
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- CN104120212B CN104120212B CN201410394728.7A CN201410394728A CN104120212B CN 104120212 B CN104120212 B CN 104120212B CN 201410394728 A CN201410394728 A CN 201410394728A CN 104120212 B CN104120212 B CN 104120212B
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Abstract
The invention discloses the new OG control method of a kind of converter dust-removing, step S1. by the position signalling Real-time Feedback of circumferential weld hydraulic cylinder lowering or hoisting gear in circumferential weld PLC system; Circumferential weld PLC sends hydraulic work system signal, and initial opening is set as; Step S2. by converter oxygen gun PLC start smelt and oxygen blast cumulative time signal be sent in circumferential weld PLC; Step S3. determines current circumferential weld aperture size according to the real-time oxygen blast cumulative time, then the aperture feeding back according to the lowering or hoisting gear of circumferential weld hydraulic cylinder regulates rising or the decline of annular seam washing tower lowering or hoisting gear. The present invention is smelting different steel grades according to adopting different oxygen gun blowing time steps to realize the segmentation control of circumferential weld aperture, can meet the technological requirement of actual production, and can reduce fire door little differential pressure sensor and disclose needle blow sweeping device, also reduce the wearing and tearing of circumferential weld Hydraulic Station proportioning valve.
Description
Technical field
The present invention relates to pneumatic steelmaking field, particularly the new OG control method of kind of converter dust-removing.
Background technology
China is iron and steel big producing country, and coal gas of converter is the byproduct during iron and steel is produced, and is also very important secondary energy sources. OrderA front dust collecting process is all to take the dust suppression of lowering the temperature, and the process that domestic steel-making dedusting is often used comprises: wet dedusting,Dry method dust. Wet dedusting is divided into: traditional OG wet method and new OG wet method. New OG wet method and traditional OG wet method phaseRatio, has security higher, and efficiency of dust collection is high, and SR is little reclaims stable feature with energy.
The coal gas of converter of 1400～1600 DEG C producing when Converter Oxigen Blowing, under taking out of blower fan drawn, through movable overskirt and carbonated drink flueBe cooled to below 900 DEG C, then enter spray column, carry out thick dedusting and further cooling and double fire extinguishing; Then coal gas enters ringSeam scrubbing tower, the gap of Outer Taper in annular seam washing tower, relies on fire door differential pressure and smelts Operating condition adjustment, and coal gas carries out essence through thisDedusting, and then slough bulky grain water droplet through dehydrating tower, enter blower fan; Malleation after blower fan machine, according to gas quality and otherCondition, coal gas is by the continuous switching of three-way switch valve, or by diffusing chimney to airborne release, or through water seal inverted valveSend into gas chamber with U-shaped water seal by pipeline.
In reality in the new OG coal-gas recovering of pneumatic steelmaking process, when one-time dedusting operating room receive blowing commencing signal after,Operating personnel improve rotating speed to rated speed by dedusting fan, then regulate circumferential weld aperture by circumferential weld hydraulic lift, therebyChange fire door pressure reduction.
In traditional OG method dedusting control system, detect fire door differential pressure by fire door pressure port sensor installation, andAccording to this differential pressure value closed-loop adjustment circumferential weld aperture. In the middle of actual production, fire door little differential pressure sensor is in pneumatic steelmakingIn this rugged environment, easily blocked, cause the measurement of differential pressure undesired, therefore adopt differential pressure closed-loop adjustment circumferential weldAperture also cannot normally be worked; And in the time running into obstruction, adopt one to disclose the method that pin moves back and forth and N2 purgesCleaning pressure port, due to after disclosing pin work and N2 purging, little differential pressure sensor can not immediately come into operation, and this also will makeBecome circumferential weld regulation normally to work.
Summary of the invention
In view of this, object of the present invention provides a kind of converter dust-removing new OG control method, and the method is being smelted different steel grade rootsRealize the disjunction control of circumferential weld aperture according to the different oxygen gun blowing time step of employing, can meet the technological requirement of actual production, andAnd can reduce fire door little differential pressure sensor and disclose needle blow sweeping device, also reduce the wearing and tearing of circumferential weld Hydraulic Station proportioning valve.
The object of the invention is to be achieved through the following technical solutions, the new OG control method of a kind of converter dust-removing, specifically comprisesFollowing steps:
Step S1. is by the position signalling of circumferential weld hydraulic cylinder lowering or hoisting gearReal-time Feedback is in circumferential weld PLC system; Circumferential weld PLC sends outGo out hydraulic system working signal, and initial opening is set as to 30%;
Step S2. by converter oxygen gun PLC start smelt and oxygen blast cumulative time signal be sent in circumferential weld PLC;
Step S3. determines current circumferential weld aperture size according to the real-time oxygen blast cumulative time, then according to the lowering or hoisting gear of circumferential weld hydraulic cylinderThe aperture feeding back regulates rising or the decline of annular seam washing tower lowering or hoisting gear.
Further, the circumferential weld aperture of setting according to the oxygen blast cumulative time meets one dimension expert aperture table, described one dimension expert apertureShow as follows:
Further, the rising of described annular seam washing tower dress lowering or hoisting gear or on to fall be to control by the following method:
Δ δ is that circumferential weld aperture is set and feedback difference,For circumferential weld aperture setting value;
As Δ δ > δ0Time, circumferential weld PLC controls circumferential weld hydraulic cylinder and declines, thereby circumferential weld aperture is increased;
As Δ δ <-δ0Time, circumferential weld PLC controls circumferential weld hydraulic cylinder and rises, thereby circumferential weld aperture is reduced;
When | Δ δ |≤δ0Time, circumferential weld aperture remains unchanged;
δ0For deviation range setting value.
Further, also comprise step S4 after described step S3, described step S4 is specially: occur that at converter mouth flue gas is excessiveTime, judge the size that fire door flue gas is excessive:
In the time that excessive flue gas concentration exceedes threshold value V1, original circumferential weld aperture setting value is increased, setting value is
In the time that excessive flue gas concentration exceedes threshold value V2, original circumferential weld aperture setting value is increased, setting value is
Wherein threshold value V1 is greater than threshold value V2.
Useful technique effect:
1, regulate in real time circumferential weld hydraulic lift owing to not adopting according to fire door differential pressure feedback signal, thereby avoided increasingAdd fire door micro-pressure-difference testing fixture and disclose needle blow sweeping device; Particularly in the situation that the inspection of fire door differential pressure is stopped up, traditionalWhat fire door differential pressure control model need to be carried out micro-pressure-difference thief hole discloses pin and purging, now fire door differential pressure will keep one abnormalState, thus difficulty brought according to the automatic adjusting of fire door differential pressure.
2, can be according to the steel grade difference of smelting, the control table of the many groups of corresponding design one dimension expert aperture; Smelting beginning, according to smeltingThe steel grade of refining is selected different one dimension expert aperture control tables on HMI, along with the next automatic adjustable ring seam of oxygen blow duration step is openedDegree.
3, avoided regulating in real time circumferential weld aperture according to fire door differential pressure with setting differential pressure, reduced circumferential weld Hydraulic Station proportioning valveWearing and tearing, extend service life of proportioning valve.
Brief description of the drawings
Fig. 1 is circumferential weld device control block diagram;
Fig. 2 is converter coal gas purification and retracting device;
Fig. 3 is the new OG control method of converter dust-removing flow chart;
Fig. 4 is for to revise new OG control flow chart according to the excessive flue gas concentration of fire door.
Detailed description of the invention
As shown in Figure 1, a kind of circumferential weld apparatus control system, comprises circumferential weld PLC, and circumferential weld PLC is by Ethernet and the first photoelectricityConverter connects, and the first optical-electrical converter is connected with the second optical-electrical converter by optical fiber, and the second optical-electrical converter passes through EthernetBe connected with converter switch, converter switch connects with body of heater PLC by Ethernet, circumferential weld PLC and the first optical-electrical converterBe arranged in circumferential weld PLC regulator cubicle, the second optical-electrical converter and converter switch configuration are indoor in converter main operation.
For the defect that regulates in real time circumferential weld hydraulic lift to bring by fire door differential pressure feedback signal, the invention providesA kind of method that regulates circumferential weld aperture by one dimension expert aperture table.
As shown in Figure 3, the new OG control method of a kind of converter dust-removing, specifically comprises the following steps:
Step S1. is by the position signalling of circumferential weld hydraulic cylinder lowering or hoisting gearReal-time Feedback is in circumferential weld PLC system; Circumferential weld PLC sends outGo out hydraulic system working signal, and initial opening is set as。
Circumferential weld hydraulic cylinder lowering or hoisting gear provides power source by circumferential weld hydraulic system, the detection signal of circumferential weld hydraulic system and control signalGather and send by circumferential weld PLC. The other circumferential weld lowering or hoisting gear control box that is provided with of circumferential weld hydraulic cylinder lowering or hoisting gear can lead in the time of maintenanceCross rising or the decline of the button control circumferential weld aperture of control box; In the time of normal work, filled by the lifting of HMI Long-distance Control circumferential weldPut.
Step S2. by converter oxygen gun PLC start smelt and oxygen blast cumulative time signal be sent in circumferential weld PLC;
Step S3. is receiving converter heat commencing signal, is moved, to ensure by operative employee at HMI top-operation circumferential weld Hydraulic StationIn automatic situation, circumferential weld PLC can control the lifting of hydraulic cylinder;
By ethernet communication, by converter oxygen gun PLC start smelt and oxygen blast cumulative time signal be sent to circumferential weld PLC; WithThe carrying out of smelting, circumferential weld PLC has preserved the one dimension expert aperture table that regulates circumferential weld aperture according to blowing oxygen quantity, this one dimension expertAperture table can operate HMI by one-time dedusting and carry out manual amendment. According to definite current circumferential weld of real-time oxygen blast cumulative timeAperture size, then the aperture feeding back according to the lowering or hoisting gear of circumferential weld hydraulic cylinder, regulate the upper of annular seam washing tower lowering or hoisting gearRise or decline, one dimension expert aperture table is as follows:
The rising of described annular seam washing tower lowering or hoisting gear or on to fall be to control by the following method:
Δ δ is that circumferential weld aperture is set and feedback difference,For circumferential weld aperture is set;
As Δ δ > δ0Time, circumferential weld PLC controls circumferential weld hydraulic cylinder and declines, thereby circumferential weld aperture is increased;
As Δ δ < δ0Time, circumferential weld PLC controls circumferential weld hydraulic cylinder and rises, thereby circumferential weld aperture is reduced;
δ0For deviation range setting value.
As shown in Figure 4, in the time that converter mouth occurs that flue gas is excessive, judge the size that fire door flue gas is excessive:
In the time that excessive flue gas concentration is very large, operate by the emergency switch button 1 of HMI, increase circumferential weld aperture, will be originalCircumferential weld setting value increases, setting value is(initial setting)；
In the time that excessive flue gas concentration is larger, operate by the emergency switch button 2 of HMI, increase circumferential weld aperture, will be originalCircumferential weld setting value increases, setting value is(initial setting)。
Excessive converter mouth exhaust gas volumn is adopted to the method for fuzzy overall evaluation, by operating personnel according to the excessive flue gas of actual fire doorAmount has been carried out fuzzy evaluation, and its fuzzy appraisal set is: the excessive flue gas concentration of V={ is very large, and excessive flue gas concentration is not very large, smokelessGas is emerged }={ V1, V2, V3}; And adopt marking mode to determine its weight level definition: { V1, V2, V3}={0.85,0.35,0}.
The present invention adopts one dimension expert control mode, can effectively avoid adopting fire door differential pressure to detect obstruction and the hydraulic control in loopThe adverse effect that the hysteresis quality of the lifting of system is brought system.
As shown in Figure 2, the present embodiment also provides a kind of converter coal gas purification and retracting device, and this device comprises turning of connecting successivelyStove 1, movable gas hood 2, spray column 3, annular seam washing tower 4, dehydrating tower 7 and gas-blowing engine 8, gas-blowing engine 8 respectivelyBe connected with burning diffusing chimney 12 and gas chamber 15. Annular seam washing tower 4 is provided with circumferential weld hydraulic stem 5, circumferential weld hydraulic fluid bar 5 byCircumferential weld hydraulic system 6 is controlled. Gas-blowing engine 8 be connected with frequency converter 9, gas-blowing engine 8 and burning diffusing chimney 12, coalOn pipeline between gas holder 15, be provided with triple valve 11, on the pipeline of gas-blowing engine 8 and burning diffusing chimney 12, be provided with otherLogical valve 10, by-passing valve is connected with triple valve. On the pipeline of gas-blowing engine 8 and gas chamber 15, be also provided with water seal inverted valve 13,Water seal inverted valve 13 is connected with triple valve 11.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art canSo that being carried out to various changes and modification, the present invention do not depart from the spirit and scope of the present invention. Like this, if of the present invention these repairWithin changing and belonging to the scope of the claims in the present invention and equivalent technologies thereof with modification, the present invention is also intended to comprise these changes and changeType is interior.
Claims (2)
1. a converter dust-removing OG control method, is characterized in that: specifically comprise the following steps:
Step S1. is by the position signalling of circumferential weld hydraulic cylinder lowering or hoisting gearReal-time Feedback is in circumferential weld PLC system; Circumferential weld PLC sends liquidPressing system working signal, and initial opening is set as to 30%;
Step S2. by converter oxygen gun PLC start smelt and oxygen blast cumulative time signal be sent in circumferential weld PLC;
Step S3. determines current circumferential weld aperture size according to the real-time oxygen blast cumulative time, then according to the lowering or hoisting gear feedback of circumferential weld hydraulic cylinderThe aperture of returning regulates rising or the decline of annular seam washing tower lowering or hoisting gear;
The circumferential weld aperture of setting according to the oxygen blast cumulative time meets one dimension expert aperture table, and described one dimension expert aperture table is as follows:
Rising or the decline of described annular seam washing tower dress lowering or hoisting gear are to control by the following method:
Δ δ is that circumferential weld aperture is set and feedback difference,For circumferential weld aperture setting value;
As Δ δ > δ0Time, circumferential weld PLC controls circumferential weld hydraulic cylinder and declines, thereby circumferential weld aperture is increased;
As Δ δ <-δ0Time, circumferential weld PLC controls circumferential weld hydraulic cylinder and rises, thereby circumferential weld aperture is reduced;
When | Δ δ |≤δ0Time, circumferential weld aperture remains unchanged;
δ0For deviation range setting value.
2. converter dust-removing OG control method according to claim 1, is characterized in that: after described step S3, also comprise stepS4, described step S4 is specially: in the time that converter mouth occurs that flue gas is excessive, judge the size that fire door flue gas is excessive:
In the time that excessive flue gas concentration exceedes threshold value V1, original circumferential weld aperture setting value is increasedSetting value is
In the time that excessive flue gas concentration exceedes threshold value V2, original circumferential weld aperture setting value is increasedSetting value isWherein threshold value V1 is greater than threshold value V2.
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| CN201410394728.7A CN104120212B (en) | 2014-08-12 | 2014-08-12 | The new OG control method of a kind of converter dust-removing |
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| CN201410394728.7A CN104120212B (en) | 2014-08-12 | 2014-08-12 | The new OG control method of a kind of converter dust-removing |
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| CN104120212A CN104120212A (en) | 2014-10-29 |
| CN104120212B true CN104120212B (en) | 2016-05-04 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154615B (en) * | 2015-09-30 | 2017-07-11 | 唐山钢铁集团有限责任公司 | A kind of literary aditus laryngis self-checking device of converter two and adjusting method |
| CN107630120B (en) * | 2016-07-18 | 2019-12-13 | 鞍钢股份有限公司 | method for adjusting converter second venturi throat |
| CN108728602A (en) * | 2017-04-13 | 2018-11-02 | 新疆八钢铁股份有限公司 | A kind of fire door circumferential weld control method improving RECOVERY OF CONVERTER GAS amount |
| CN108676958A (en) * | 2018-05-22 | 2018-10-19 | 武汉钢铁有限公司 | A kind of method and device for avoiding converter gas excessive |
| CN113215351B (en) * | 2021-04-23 | 2022-05-03 | 合肥工业大学 | Temperature control system for converter dry dedusting evaporative cooling tower |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041346A (en) * | 2010-12-28 | 2011-05-04 | 北京建龙重工集团有限公司 | Method for automatic bottom blowing control of converter |
| CN102534100A (en) * | 2012-01-06 | 2012-07-04 | 中冶南方工程技术有限公司 | Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system |
| CN203256295U (en) * | 2013-03-29 | 2013-10-30 | 中冶南方工程技术有限公司 | Self-adapted regulation control system of oxygen blowing pressure of converter |
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2014
- 2014-08-12 CN CN201410394728.7A patent/CN104120212B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041346A (en) * | 2010-12-28 | 2011-05-04 | 北京建龙重工集团有限公司 | Method for automatic bottom blowing control of converter |
| CN102534100A (en) * | 2012-01-06 | 2012-07-04 | 中冶南方工程技术有限公司 | Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system |
| CN203256295U (en) * | 2013-03-29 | 2013-10-30 | 中冶南方工程技术有限公司 | Self-adapted regulation control system of oxygen blowing pressure of converter |
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