CN103206569A - Adjusting method for argon oxygen decarburization (AOD) furnace regulating valve - Google Patents
Adjusting method for argon oxygen decarburization (AOD) furnace regulating valve Download PDFInfo
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- CN103206569A CN103206569A CN2013100191343A CN201310019134A CN103206569A CN 103206569 A CN103206569 A CN 103206569A CN 2013100191343 A CN2013100191343 A CN 2013100191343A CN 201310019134 A CN201310019134 A CN 201310019134A CN 103206569 A CN103206569 A CN 103206569A
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Abstract
An adjusting method for an argon oxygen decarburization (AOD) furnace regulating valve comprises a first step of recording flow data under normal working conditions when valve opening is 0%-100%, and establishing an area with the opening corresponding to a flow value at a +/-10% fluctuation width of normal pressure; a second step of calibrating conventional proportional integral differential (PID) parameters according to the normal working conditions, recording current proportional integral (PI) parameters, and enabling the 1.3-time actually-measured P parameter and 1.5-time actually-measured I parameter to be input a conventional PID control module parameter; a third step of when deviation between a gas set value and the actual flow value is larger than or equal to 3% of a full scale, enabling a programmable logic controller (PLC) system to automatically calculate a valve opening value required for achieving a target set value under current pressure and start to keep time and replace conventional PID control module output to control the valve at the time; and a fourth step of enabling the PLC system to be automatically switched to the conventional PID control module output to control the valve when the deviation between the gas set value and the actual flow value is smaller than 3% of the full scale.
Description
Technical field
The invention belongs to automatic control system, be specifically related to the regulating method of AOD stove modulating valve.
Background technique
The AOD stove is as a kind of stainless steel precision furnace, and its major function is to be blown into an amount of oxygen, nitrogen and nitrogen in the different smelting stages of stainless steel, thereby reaches the purpose of smelting stainless steel, so the accurate control of all kinds of gases is proposed quite strict requirement.And need constantly be adjusted the setting value of all kinds of gases according to molten steel composition, temperature in the smelting process of reality, thereby realize the accurate control of gas.Ratio as decarburization stage, smelting stage, refining stage oxygen and inert gas in traditional smelting stainless steel technology is 3:1,1:1,1:3, tens stages have been refine to and in modern intelligence is smelted, smelt the proportioning pattern, namely in 40 a few minutes of a stove stainless steel smelting, every equispaced less than just needed to change a gas setting value in 4 minutes, so quick, stable, the accurate adjusting of controlling device proposed the quite requirement of harshness.
Summary of the invention
The objective of the invention is to realize quick, the stable goal-setting value that reaches of AOD stove modulating valve, realize accurate control, the proportioning of AOD furnace gases.
Technological scheme of the present invention is: the present invention be with computer PLC as control core, adopt digital vortex flowmeter as gas-detecting device, pneumatic control valve is as actuating device.
1, PLC system log (SYSLOG) nominal situation lower valve aperture is 0% ~ 100% o'clock, the actual flow data, and with normal pressure ± 10% the fluctuation width, set up aperture and flow value corresponding region.
2, demarcate conventional pid parameter according to nominal situation, record current PI parameter, and in 1.3 times of the P parameters and 1.5 times of conventional pid control module parameters of input of I parameter with practical measurement.
3, when gas setting value and actual flow value deviation more than or equal to full scale 3% the time, required valve opening value and picking up counting when the PLC system calculates current pressure automatically and is issued to the goal-setting value substitutes conventional pid control module (conventional pid control module output this moment with calculate opening value be consistent) output control valve this moment.
4, when gas setting value and actual flow deviate less than full scale 3% the time, or timing is in the time of full 5 seconds, the conventional PID adjustment module output of the automatic switchback of PLC system control valve.
AOD stove valve station is blown into the AOD stove after by 5 ~ 8 road gas precisely-proportioned mixing, is example with the oxygen control valve door here, and control principle is described, all the other valve control modes are identical.In the control system, PLC adopts Siemens S7-300 series of PLC, and flowmeter adopts Japanese Yokogawa Scroll-tupe flowmeter, and modulating valve adopts the Fisher modulating valve.
Because of disturbance in AOD stove modulating valve control mainly from aspect two: 1. the fluctuation or the instability that cause of the frequent change of setting value; 2. the instability that causes of system parameter variations, the instability that causes the mutual play of gas to cause when unequal or setting value changes simultaneously as gas pressure fluctuation, the liquid steel level change caused when the AOD stove fascinated pressure surge, several roads mixture pressure.
The present invention realizes that the AOD stove in quick, accurate, the stable realization of difference smelting stage gas with various setting value, finally improves the First Pass Yield of stainless steel smelting, shortens the heat the reduction smelting cost.
Embodiment
1, program record nominal situation lower valve aperture is 0% ~ 100% o'clock, the actual flow data, and with normal pressure ± 10% fluctuation width, set up aperture and flow value corresponding region.
2, demarcate conventional pid parameter according to nominal situation, record current PI parameter, and in 1.3 times of the P parameters and 1.5 times of conventional pid control module parameters of input of I parameter with practical measurement.
3, when gas setting value and actual flow value deviation more than or equal to full scale 3% the time, that is:, required valve opening value and picking up counting when the PLC system calculates current pressure automatically and is issued to the goal-setting value substitutes conventional pid control module (conventional pid control module output this moment with calculate opening value be consistent) output control valve this moment.
4, when gas setting value and actual flow deviate less than full scale 3% the time, or timing is in the time of full 5 seconds, the conventional PID adjustment module output of the automatic switchback of system control valve.
Claims (1)
1.AOD the regulating method of stove modulating valve,
(1), PLC system log (SYSLOG) nominal situation lower valve aperture 0% ~ 100% o'clock, the actual flow data, and with normal pressure ± 10% fluctuation width, set up aperture and flow value corresponding region;
(2), demarcate conventional pid parameter according to nominal situation, record current PI parameter, and in 1.3 times of the P parameters and 1.5 times of conventional pid control module parameters of input of I parameter with practical measurement;
(3), when gas setting value and actual flow value deviation more than or equal to full scale 3% the time, required valve opening value and picking up counting when the PLC system calculates current pressure automatically and is issued to the goal-setting value substitutes conventional pid control module output control valve this moment;
(4), when gas setting value and actual flow deviate less than 3% or timing of full scale in the time of full 5 seconds, the conventional PID adjustment module output of the automatic switchback of PLC system control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100191343A CN103206569A (en) | 2013-01-20 | 2013-01-20 | Adjusting method for argon oxygen decarburization (AOD) furnace regulating valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100191343A CN103206569A (en) | 2013-01-20 | 2013-01-20 | Adjusting method for argon oxygen decarburization (AOD) furnace regulating valve |
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| CN103206569A true CN103206569A (en) | 2013-07-17 |
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| CN2013100191343A Pending CN103206569A (en) | 2013-01-20 | 2013-01-20 | Adjusting method for argon oxygen decarburization (AOD) furnace regulating valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278329A (en) * | 2014-07-07 | 2016-01-27 | 阿自倍尔株式会社 | Pid controller and data collecting method |
| CN109423542A (en) * | 2017-09-01 | 2019-03-05 | 宝山钢铁股份有限公司 | The outer spray cooling device of steel pipe off-line quenching and method |
| CN110947279A (en) * | 2019-12-06 | 2020-04-03 | 马光俊 | Control method for rapidly changing working conditions |
| CN113883910A (en) * | 2021-10-19 | 2022-01-04 | 攀钢集团西昌钢钒有限公司 | Method for controlling regulating valve by control system when throttling flowmeter is in dead zone |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04198393A (en) * | 1990-11-28 | 1992-07-17 | Nippon Brown Coal Liquefaction Corp | Flow rate controller of slurried fluid |
| CN102540876A (en) * | 2011-12-27 | 2012-07-04 | 沈阳铸造研究所 | Manual console of AOD (argon oxygen decarburization) system |
-
2013
- 2013-01-20 CN CN2013100191343A patent/CN103206569A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04198393A (en) * | 1990-11-28 | 1992-07-17 | Nippon Brown Coal Liquefaction Corp | Flow rate controller of slurried fluid |
| CN102540876A (en) * | 2011-12-27 | 2012-07-04 | 沈阳铸造研究所 | Manual console of AOD (argon oxygen decarburization) system |
Non-Patent Citations (3)
| Title |
|---|
| 何永亮等: "AOD精炼炉控制系统的改进与应用", 《铸造》, vol. 60, no. 9, 30 September 2011 (2011-09-30), pages 903 - 905 * |
| 何永亮等: "低合金钢精炼用AOD智能控制系统的研制", 《铸造》, vol. 61, no. 11, 30 November 2012 (2012-11-30), pages 1296 - 1298 * |
| 韩明飞: "AOD炉控制系统改造方案设计", 《沈阳工程学院学报（自然科学版）》, vol. 3, no. 1, 31 January 2007 (2007-01-31), pages 51 - 54 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278329A (en) * | 2014-07-07 | 2016-01-27 | 阿自倍尔株式会社 | Pid controller and data collecting method |
| CN105278329B (en) * | 2014-07-07 | 2018-02-13 | 阿自倍尔株式会社 | PID controller and method of data capture |
| CN109423542A (en) * | 2017-09-01 | 2019-03-05 | 宝山钢铁股份有限公司 | The outer spray cooling device of steel pipe off-line quenching and method |
| CN110947279A (en) * | 2019-12-06 | 2020-04-03 | 马光俊 | Control method for rapidly changing working conditions |
| CN110947279B (en) * | 2019-12-06 | 2022-03-04 | 马光俊 | Control method for rapidly changing working conditions |
| CN113883910A (en) * | 2021-10-19 | 2022-01-04 | 攀钢集团西昌钢钒有限公司 | Method for controlling regulating valve by control system when throttling flowmeter is in dead zone |
| CN113883910B (en) * | 2021-10-19 | 2023-05-16 | 攀钢集团西昌钢钒有限公司 | Method for controlling regulating valve by control system when throttle flowmeter is in dead zone |
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Application publication date: 20130717 |