CN102534100B - 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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- CN102534100B CN102534100B CN 201210002858 CN201210002858A CN102534100B CN 102534100 B CN102534100 B CN 102534100B CN 201210002858 CN201210002858 CN 201210002858 CN 201210002858 A CN201210002858 A CN 201210002858A CN 102534100 B CN102534100 B CN 102534100B
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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, for reclaiming the one-time dedusting device that coal gas adopts.
Background technology
Produce coal gas of converter in the converter steelmaking production process, for reclaiming available byproduct coal gas, adopt one-time dedusting technology to lower the temperature and dedusting.The processing 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, is mainly used to realize 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 by hydraulic drive, and control mode comprises: 1. automatically controlled mode: reversing valve; 2. instrument prosecutor formula: servo-valve.Automatically controlled mode i.e. reversing valve operated (magnetic valve) action manually, thereby adjusts the circumferential weld position, generally in case of emergency uses.Instrument prosecutor formula then is to receive the faint electric signal of small power and convert bigger signal to by 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 by 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 be produced fluctuation.For guaranteeing to reclaim gas quality and quantity, the movement range of circumferential weld cone and speed need be subjected to strict restriction simultaneously.The form of traditional direct adjusting can not satisfy existing processing requirement.
Summary of the invention
In view of this, the technical problem to be solved in the present invention 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 technology, technology is as follows: A, the position feed back signal of circumferential weld device is inserted PLC, simultaneously the PLC output signal directly is connected to servo-valve; B, blowing intermittent phase, circumferential weld cone and the petticoat pipe position of circumferential weld device are positioned at concentrated manual state, and fixedly aperture manually is set; 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 presses fluctuation range to dwindle elementary errors, and then the servo-valve of circumferential weld device is arranged to concentrate auto state.
Further, it is characterized in that in described step D, the circumferential weld cone of described 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; Described Hydraulic Station provides propulsion source for the circumferential weld control device, directly be delivered to servo-valve by the PLC signal after the time variable control processing, the action of control servo-valve, this circumferential weld cone action of servo-valve driving control, petticoat pipe increases the absolute value encoder that is used for highly demonstration and meticulous control.
The reversing valve control mode of using when further, described circumferential weld device also is provided with emergency episode.
Further, described servo-valve is provided with and concentrates manually and concentrate automatic two kinds of adjustment structures.
Further, described 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 as follows: the present invention directly introduces the PLC system with feedback signal.By 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.By 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.By 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.
Control mode is as follows:
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, even the target value of tracing into, also may be because the cone movement range be excessive, the quality and the quantity that cause reclaiming coal gas are subjected to very big influence, even cause that recovering condition does not satisfy.
At this moment, need be by 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, when the fire door elementary errors is pressed near the target value fluctuation within a narrow range, and the lifting of control circumferential weld cone.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 control of safeguard protection position on the other hand, reach when setting the Security alert position and can not surpass again.In the time of namely in circumferential weld cone secure location, can't being adjusted to target value, temporarily stop the action of circumferential weld cone, continue to regulate by 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, therefore can control CO, O2 concentration and satisfy the recovery requirement as early as possible.
The invention will be further described below in conjunction with Fig. 2, but do not limit the present invention.Recovery system technology generally comprises: converter produces coal gas of converter, dedusting and cooling by the circumferential weld device again, comprise 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, coal gas of converter after after the cooling dedusting, pump coal gas to the dedusting of 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 by 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 turns round continuously, 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, aperture manually is set.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, enter 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 substantially, mainly utilize the circumferential weld cone to regulate, the circumferential weld device is arranged to concentrate under the servo-valve state of a control control (PID adjusting) automatically, because controlled plant changes 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, enters 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, the circumferential weld position has a significant impact 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, control mode needs to adorn immediately to change concentrated manual state into, keeps original position constant, switches to petticoat pipe control simultaneously.And so forth, the fluctuation depreciation minimum that elementary errors is pressed.Recovery time continues about 10 minutes, after the finishing blowing, and residual coal gas of converter still in the pipeline, so the recovery state is not over yet.
After reclaiming end, enter 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, can be with the petticoat pipe position of three different steps correspondences, 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 preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (6)
1. the new OG of once dust collection of converter system circumferential weld control technology is characterized in that technology is as follows:
A, the position feed back signal of circumferential weld device is inserted PLC, simultaneously the PLC output signal directly is connected to servo-valve;
B, blowing intermittent phase, circumferential weld cone and the petticoat pipe position of circumferential weld device are positioned at concentrated manual state, and fixedly aperture manually is set;
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 presses fluctuation range to dwindle elementary errors, and then the servo-valve of circumferential weld device is arranged to concentrate auto state.
2. the new OG of once dust collection of converter as claimed in claim 1 system circumferential weld control technology, it is characterized in that, in described step D, the circumferential weld cone of described circumferential weld device reaches the technology state of alert, servo-valve converts concentrated manual state immediately to, 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; Described Hydraulic Station provides propulsion source for the circumferential weld control device, it is characterized in that, directly be delivered to servo-valve by the PLC signal after the time variable control processing, the action of control servo-valve, this circumferential weld cone action of servo-valve driving control, petticoat pipe increases the absolute value encoder that is used for 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 control mode that described 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, described 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, described 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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| 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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| CN102534100A CN102534100A (en) | 2012-07-04 |
| CN102534100B true CN102534100B (en) | 2013-08-14 |
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Families Citing this family (6)
| 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 |
| 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 |
| CN102978331B (en) * | 2012-12-04 | 2014-05-07 | 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 |
| 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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| CN201817439U (en) * | 2010-10-19 | 2011-05-04 | 大连华宇冶金设备有限公司 | Coal gas exchanging controller |
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