CN102534100A - Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system - Google Patents
Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system Download PDFInfo
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- CN102534100A CN102534100A CN2012100028582A CN201210002858A CN102534100A CN 102534100 A CN102534100 A CN 102534100A CN 2012100028582 A CN2012100028582 A CN 2012100028582A CN 201210002858 A CN201210002858 A CN 201210002858A CN 102534100 A CN102534100 A CN 102534100A
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Abstract
The invention discloses a circular seam control device and process for a novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system. The circular seam control process comprises the following steps of: accessing a position feedback signal of the circular seam control device to a PLC (Programmable Logic Controller) and accessing a signal output from the PLC to a servo valve; in a blowing intermission, concentratedly manually operating a circular seam cone and a smoke hood and manually setting openness; in the initial blowing stage, enabling a three-way valve to be at a diffusion side, igniting and discharging coal gas of a converter, keeping the position of the smoke hood fixed, and enabling the circular seam control device to be in an concentrated and automatic state of the servo valve; in the intermediate blowing stage, enabling the three-way valve to be at a recovery side, roughly adjusting the height and the micro-differential pressure of the smoke hood, reducing the fluctuation of the micro-differential pressure, and setting the circular seam control device to be in a concentrated and automatic state of the serve valve. The circular seam control device comprises the circular seam cone, a hydraulic station and the PLC. The smoke hood is used for matching control over the circular seam control device; the hydraulic station is used for supplying power; the PLC is used for transmitting the signal to the servo valve and controlling the servo valve to actuate; the servo valve is used for driving and controlling the circular seam cone; and an absolute encoder is additionally arranged on the smoke hood. The circular seal control device and process disclosed by the invention have the advantages of reduced number of installation equipment, increase of energy recovery, low investment and high system precision.
Description
Technical field
The present invention relates in a kind of converter steelmaking production, is to reclaim the one-time dedusting device that coal gas adopted.
Background technology
Produce coal gas of converter in the converter steelmaking production process,, adopt one-time dedusting technology to lower the temperature and dedusting for reclaiming available sub product coal gas.The process method that the converter current one-time dedusting adopts comprises: dry method, semidrying, wet method.Wherein wet dedusting mode is divided into: a literary composition two civilian traditional OG system and new OG systems.New OG system device comprises: spray column, circumferential weld device and dehydration tower.
Wherein, the circumferential weld device is Venturi tube structure, mainly is used for realizing the smart dedusting of coal gas of converter, simultaneously, also is used for regulating the fire door elementary errors and presses, and control is reclaimed the time opening and reclaimed the coal gas amount.The circumferential weld device is through hydraulic drive, and mode comprises: 1. automatically controlled mode: reversing valve; 2. appearance prosecutor formula: servo-valve.Automatically controlled mode promptly reversing valve operated manually (SV) action, thus generally in case of emergency use adjustment circumferential weld position.Appearance prosecutor formula then is to receive the faint electric signal of small power and convert bigger signal to through servoamplifier to export to servo-valve, drives circumferential weld, realizes the control to target.
The servo-valve control of tradition circumferential weld device is directly to adjust circumferential weld position control converter mouth elementary errors through servoamplifier to press.Yet in actual production process, fire door elementary errors pressure can and be fallen the cup degree with the converter production phase and produced fluctuation.Reclaim gas quality and quantity for guaranteeing simultaneously, the movement range of circumferential weld cone and speed need receive strict restriction.The form of traditional direct adjusting can not satisfy existing processing requirement.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of feedback signal directly is connected to the PLC system, directly controls the converter mouth elementary errors of circumferential weld device and presses.
For solving the problems of the technologies described above; Technical scheme of the present invention is achieved in that the new OG of a kind of once dust collection of converter system circumferential weld CONTROL PROCESS; Technology is following: A, the position feed back signal of circumferential weld device is inserted PLC, simultaneously PLC is exported signal and directly be connected to servo-valve; B, blowing intermittent phase, the circumferential weld cone and the petticoat pipe position of circumferential weld device are positioned at concentrated manual state, and manual work is provided with fixedly aperture; C, blowing initial stage, T-valve is in and diffuses side, and coal gas of converter is directly lighted discharging, and the elementary errors pressure measuring device begins to come into operation, and the petticoat pipe stationkeeping is motionless, and the circumferential weld device is in the concentrated auto state of servo-valve.D, blowing mid-term, T-valve is in the recovery side, and the little closed loop coarse adjustment that the advanced line height of petticoat pipe and elementary errors are pressed is pressed fluctuation range to dwindle elementary errors, and then the servo-valve of circumferential weld device is arranged to concentrated auto state.
Further, it is characterized in that in said step D, the circumferential weld cone of said circumferential weld device reaches the technology state of alert, servo-valve is adorned immediately and is changed concentrated manual state into, and keeps existing invariant position, switches to the petticoat pipe state of a control simultaneously.
The new OG of a kind of once dust collection of converter system circumferential weld device comprises circumferential weld cone, Hydraulic Station, servo-valve, PLC.Petticoat pipe cooperates the control of circumferential weld device; Said Hydraulic Station provides propulsion source for the circumferential weld gear; PLC signal through after the time variable control processing directly is delivered to servo-valve; The action of control servo-valve, this circumferential weld cone action of servo-valve drive controlling, the petticoat pipe increase is used for the absolute value encoder of highly demonstration and meticulous control.
The reversing valve mode of using when further, said circumferential weld device also is provided with emergency episode.
Further, said servo-valve is provided with and concentrates manually and concentrate automatic two kinds of adjustment structures.
Further, said petticoat pipe is provided with and concentrates manually and concentrate automatic two kinds of adjustment structures.
The technique effect that the present invention reaches is following: the present invention directly introduces the PLC system with feedback signal.Through directly exporting the PLC signal to servo-valve after the routine processes, the action of control servo-valve.Because the handiness of PLC program can be carried out meticulous and strict control to the motion of cone.The present invention has erecting equipment and reduces, and increases energy recovery utilization, low, the relative advantages of higher of system accuracy of investment.For prograding has been played in the smelter energy-saving and emission-reduction.Through the raising of system accuracy, not only strengthen the control that elementary errors is pressed, and stablized the coal-gas recovering amount, more early up to standard of control CO, O2, thus recovery time is shifted to an earlier date.RECOVERY OF CONVERTER GAS has been played active effect.
Description of drawings
Fig. 1 is circumferential weld system program control principle figure;
Fig. 2 is for adopting the process schematic representation of circumferential weld device of the present invention.
Embodiment
The present invention directly introduces the PLC system with feedback signal.Through directly exporting the PLC signal to servo-valve after the routine processes, the action of control servo-valve.Because the handiness of PLC program can be carried out meticulous and strict control to the motion of cone.
Mode is following:
According to the converter production technique, be divided into three phases.
The blowing intermittent phase (converter is not produced and do not reclaimed): control output is set to fixedly empirical value.Circumferential weld cone and petticoat pipe stationkeeping guarantee that normal pipeline is unimpeded.
Begin blowing (converter begins to produce and do not reclaim): because production initial stage fire door elementary errors pressure ratio is more stable, so adjustment factor can be bigger, and the petticoat pipe position also remains on the fixed position.
Blowing mid-term (converter production and begin reclaim): CO, O2 content is up to standard, begins to reclaim coal gas.Because T-valve is opened; The fire door elementary errors is pressed to change and is begun aggravation; Regulate the difficulty that becomes according to target value this time purely, though the target value of tracing into, also maybe be because the cone movement range is excessive; The quality and the quantity that cause reclaiming coal gas receive very big influence, even cause that recovering condition does not satisfy.
At this moment, need through the common control that realizes fire door elementary errors pressure in the position of petticoat pipe and circumferential weld cone.The petticoat pipe position is adjusted into coarse adjustment, when the fire door elementary errors fluctuates widely near target value, and the action of control petticoat pipe.Circumferential weld cone position is adjusted into fine tuning, and when the fire door elementary errors was pressed near the target value fluctuation within a narrow range, control circumferential weld cone was gone up and down.For preventing coupling, the action of petticoat pipe and circumferential weld is asynchronous.During the action of control cone, regulate towards the direction that reaches target value on the one hand, keep certain hysteresis quality simultaneously, governing speed can not be too fast, guarantees to reclaim the stable of tolerance.Carry out the safeguard protection control of position on the other hand, reach when setting the Security alert position and can not surpass again.In the time of promptly in circumferential weld cone perch, can't being adjusted to target value, temporarily stop the action of circumferential weld cone, continue to regulate through regulating the petticoat pipe height.When converter was produced, also there was certain influence the position of adjustment circumferential weld cone and petticoat pipe to the concentration of CO, O2, so may command CO, O2 concentration satisfy the recovery requirement as early as possible.
Below in conjunction with Fig. 2 the present invention is described further, but does not limit the present invention.Recovery system technology generally comprises: converter produces coal gas of converter, again through the dedusting and the cooling of circumferential weld device, comprises the washing tower washing; The adjusting that the aperture of control circumferential weld cone and petticoat pipe is pressed the fire door elementary errors, control fire door place pressure-fired, the coal gas of converter after after the dedusting of lowering the temperature; Pump the dedusting of coal gas to one-time dedusting blower fan, reclaim or diffuse coal gas of converter, if the qualified converter gas cabinet of delivering to; If defective, directly light discharging through diffusing tower.
At first, the primer fluid press pump, the operation Hydraulic Station is for the circumferential weld device provides propulsion source.
Revolving furnace fume hood increases absolute value encoder, is used for highly showing and meticulous control.
The circumferential weld position feed back signal is inserted PLC, and the AO output signal with PLC directly is connected to servo-valve simultaneously.
The non-blowing of converter/non-payback period, circumferential weld cone and petticoat pipe stationkeeping are in suitable aperture.Because one-time dedusting process section Ventilator Room inner blower continuous operation, so the circumferential weld cone can not complete closed.At this moment, the control of circumferential weld cone is arranged to concentrate manually (aperture is set) under the servo-valve state, manual work is provided with aperture.Fire door elementary errors pressure measuring device does not drop into, and does not regulate elementary errors yet and presses.
Add steel scrap, after converting iron blowing preparation step and finishing, get into the blowing process.Fire door elementary errors pressure measuring device begins to come into operation.
At the blowing initial stage, three-way valve position is diffusing side, and coal gas of converter does not meet recovering condition, directly lights the back discharging.At this moment, elementary errors presses fluctuation inviolent, and value set is at-20Pa ~ 30Pa.Petticoat pipe is regulated not to be needed basically; Mainly utilize the circumferential weld cone to regulate, the circumferential weld device is arranged to concentrate control (PID adjusting) automatically under the servo-valve state of a control, because the controlled plant variation is little; Scale-up factor P during circumferential weld PID regulates; The I value is bigger, carries out fine tuning, makes controlled plant fire door elementary errors pressure energy adjust to target value rapidly.
After blowing is carried out about 6 ~ 8 minutes, CO, O2 content reaches the recovery standard, and T-valve opens to and reclaims side, gets into the recovery state.This stage fire door elementary errors presses fluctuation violent, and numerical value can reach-100 ~ 100Pa.At this moment, carry out the little closed loop coarse adjustment that petticoat pipe height and elementary errors are pressed earlier, press fluctuation range to dwindle elementary errors.And then the circumferential weld device is arranged under the servo-valve state of a control to concentrate automatically, presses situation about changing according to controlled elementary errors, but real time altering target setting value.Owing to be in recovery stage, there is very big influence the circumferential weld position to reclaiming the coal gas amount, so scale-up factor P value needs less in the circumferential weld PID adjusting.If the circumferential weld cone arrives technology warning position, mode needs to adorn immediately to change concentrated manual state into, keeps original position constant, switches to petticoat pipe control simultaneously.The fluctuation depreciation minimum of so back and forth, elementary errors being pressed.Recovery time continues about 10 minutes, after the finishing blowing, and still residual coal gas of converter in the pipeline, so the recovery state is not over yet.
After reclaiming end, get into the non-blowing of converter/non-payback period, petticoat pipe and circumferential weld switch to concentrated manual state, and height is composed fixed value by program.
Through repeatedly production practice, petticoat pipe position that can three different stepss are corresponding, circumferential weld change in location zone and PID adjustment factor and fire door elementary errors thereof are pressed numerical value, and yield reclaims the time opening and sets up data and curves analysis.Thereby obtain to meet most the adjustment factor of our factory's process section and target value is set.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (6)
1. the new OG of once dust collection of converter system circumferential weld CONTROL PROCESS is characterized in that technology is following:
A, the position feed back signal of circumferential weld device is inserted PLC, simultaneously PLC is exported signal and directly be connected to servo-valve;
B, blowing intermittent phase, the circumferential weld cone and the petticoat pipe position of circumferential weld device are positioned at concentrated manual state, and manual work is provided with fixedly aperture;
C, blowing initial stage, T-valve is in and diffuses side, and coal gas of converter is directly lighted discharging, and the elementary errors pressure measuring device begins to come into operation, and the petticoat pipe stationkeeping is motionless, and the circumferential weld device is in the concentrated auto state of servo-valve;
D, blowing mid-term, T-valve is in the recovery side, and the little closed loop coarse adjustment that the advanced line height of petticoat pipe and elementary errors are pressed is pressed fluctuation range to dwindle elementary errors, and then the servo-valve of circumferential weld device is arranged to concentrated auto state.
2. the new OG of once dust collection of converter as claimed in claim 1 system circumferential weld CONTROL PROCESS; It is characterized in that; In said step D, the circumferential weld cone of said circumferential weld device reaches the technology state of alert, and servo-valve is adorned immediately and changed concentrated manual state into; And keep existing invariant position, switch to the petticoat pipe state of a control simultaneously.
3. the new OG of an once dust collection of converter system circumferential weld device comprises circumferential weld cone, Hydraulic Station, servo-valve, PLC, and petticoat pipe cooperates the control of circumferential weld device; Said Hydraulic Station provides propulsion source for the circumferential weld gear; It is characterized in that; PLC signal through after the time variable control processing directly is delivered to servo-valve; The action of control servo-valve, this circumferential weld cone action of servo-valve drive controlling, the petticoat pipe increase is used for the absolute value encoder of highly demonstration and meticulous control.
4. the new OG of once dust collection of converter as claimed in claim 3 system circumferential weld device is characterized in that the reversing valve mode that said circumferential weld device uses when also being provided with emergency episode.
5. the new OG of once dust collection of converter as claimed in claim 3 system circumferential weld device is characterized in that, said servo-valve is provided with concentrates manually and concentrate automatic two kinds of adjustment structures.
6. the new OG of once dust collection of converter as claimed in claim 3 system circumferential weld device is characterized in that, said petticoat pipe is provided with concentrates manually and concentrate automatic two kinds of adjustment structures.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210002858 CN102534100B (en) | 2012-01-06 | 2012-01-06 | Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system |
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| CN 201210002858 CN102534100B (en) | 2012-01-06 | 2012-01-06 | Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system |
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| CN102534100A true CN102534100A (en) | 2012-07-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888488A (en) * | 2012-10-17 | 2013-01-23 | 中冶南方工程技术有限公司 | Control method of draught fan for dry dust removal of converter gas |
| CN102925620A (en) * | 2012-08-07 | 2013-02-13 | 中冶建筑研究总院有限公司 | Automatic controlling method of converter gas purification and recovery system adjustable Venturi tube |
| CN102978331A (en) * | 2012-12-04 | 2013-03-20 | 中冶赛迪工程技术股份有限公司 | Control method for improving gas recovery of new OG (Oxygen Converter Gas Recovery) converter |
| CN104120212A (en) * | 2014-08-12 | 2014-10-29 | 中冶赛迪电气技术有限公司 | Novel OG controlling method for dust collection of converter |
| CN105987030A (en) * | 2015-02-04 | 2016-10-05 | 北京博鹏北科科技有限公司 | Double closed-loop hydraulic servo device for converter |
| 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 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925620A (en) * | 2012-08-07 | 2013-02-13 | 中冶建筑研究总院有限公司 | Automatic controlling method of converter gas purification and recovery system adjustable Venturi tube |
| CN102888488A (en) * | 2012-10-17 | 2013-01-23 | 中冶南方工程技术有限公司 | Control method of draught fan for dry dust removal of converter gas |
| CN102888488B (en) * | 2012-10-17 | 2014-12-17 | 中冶南方工程技术有限公司 | Control method of draught fan for dry dust removal of converter gas |
| CN102978331A (en) * | 2012-12-04 | 2013-03-20 | 中冶赛迪工程技术股份有限公司 | Control method for improving gas recovery of new OG (Oxygen Converter Gas Recovery) converter |
| CN104120212A (en) * | 2014-08-12 | 2014-10-29 | 中冶赛迪电气技术有限公司 | Novel OG controlling method for dust collection of converter |
| CN104120212B (en) * | 2014-08-12 | 2016-05-04 | 中冶赛迪电气技术有限公司 | The new OG control method of a kind of converter dust-removing |
| CN105987030A (en) * | 2015-02-04 | 2016-10-05 | 北京博鹏北科科技有限公司 | Double closed-loop hydraulic servo device for converter |
| 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 |
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