CN101949549A - Flow control method of combustion system - Google Patents
Flow control method of combustion system Download PDFInfo
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- CN101949549A CN101949549A CN 201010510518 CN201010510518A CN101949549A CN 101949549 A CN101949549 A CN 101949549A CN 201010510518 CN201010510518 CN 201010510518 CN 201010510518 A CN201010510518 A CN 201010510518A CN 101949549 A CN101949549 A CN 101949549A
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Abstract
The invention discloses a flow control method of a combustion system, in particular relating to the flow control method of the combustion system used in galvanization or a heating section of a continuous annealing unit. The invention provides the flow control method of the combustion system which can help the combustion system reach a stable state rapidly, comprising the following steps: A. firstly measuring opening of a gas flow regulating valve and an air flow regulating valve in the case of stable temperature and pressure; B. setting the opening of the gas flow regulating valve and the air flow regulating valve to be 80%-100% of the opening in the case of stable temperature and pressure before burning for realizing gas combustion at the opening; and C. burning and operating a PID control system which increases or decreases fuel and air flow and adjusts temperature and temperature deviation by the gas flow regulating valve and the air flow regulating valve according to change of load and operating conditions so that the whole combustion process reaches a stable status.
Description
Technical field
The present invention relates to a kind of combustion system flow control methods, especially a kind of zinc-plated or connect and to move back the combustion system flow control methods that the unit bringing-up section is used.
Background technology
In combustion system, all be to control usually with PID (proportional-integral derivative controller), the PID controller is according to the PID control principle The whole control system to be carried out bias adjustment, thereby makes the actual value of controlled variable consistent with the predetermined value of technological requirement.Though the PID controller can keep actual value consistent with process value in long-time running, is difficult to reach fast predetermined process value when initial.Unit bringing-up section combustion system is moved back by for example zinc-plated or company, its combustion gas and air caliber according to the bringing-up section ability usually at 100mm between 200mm, mixed combustion must be oxygen debt a little burning for satisfying the strip surface quality requirement, adjusting is simultaneously controlled should guarantee stability of flow as far as possible, it is less to fluctuate, and reaches the flow set desired value fast.In fact, combustion gas and air flow rate adjustment valve adopt conventional PID control usually, and flow is from 0M
3/ H adjusts to the flow of technique initialization, the aperture of valve is to regulate to be opened to by PID from 0% to need aperture, the adjusting of this process valve is slower, simultaneously in the interval valve regulated instability of low discharge, cause in this adjustment process, combustion instability, insufficient, the combustion system security is low, and influences product quality.
Summary of the invention
Technical problem to be solved by this invention provides a kind of combustion system flow control methods that can make combustion system reach stable state fast.
The present invention solves the combustion system flow control methods that its technical problem adopts, and may further comprise the steps:
A, the aperture of gas flow control valve and air flow rate adjustment valve when at first recording temperature and pressure and stablize;
B, before burning, the 80%-100% of aperture made combustion gas burn under this aperture when the aperture of gas flow control valve and air flow rate adjustment valve was set to temperature and pressure and stablizes;
C, burn and move the PID control system, the PID control system is according to the variation of load and operating mode, utilize gas flow control valve and air flow rate adjustment valve that fuel and air mass flow are increased or reduces, adjust the temperature deviation of temperature and appearance, thereby make whole combustion process reach smooth combustion.
Further be, in the B step, when the aperture of gas flow control valve and air flow rate adjustment valve is set to temperature and pressure and stablizes 100% of aperture.
Concrete, in the B step, when the aperture of gas flow control valve and air flow rate adjustment valve is set to temperature and pressure and stablizes 93.3% of aperture.
Further be that in the B step, flue gas flow control valve and air flow rate adjustment valve are regulated by the PLC control system.
The invention has the beneficial effects as follows: carrying out at first giving the combustion system flow control valve pretravel before the PID control, under the basis of this aperture, carry out PID control again, this just makes combustion system just can obtain the gas flow that needs fast under the situation of beginning, thereby reach the process conditions that roughly need fast, this moment, the PID controller utilized self advantage again, flow is carried out long-term control, make whole combustion system stable.So both avoided having improved product quality at undesirable conditions such as burning initiation combustion instability, insufficient and combustion system security are low.
Description of drawings
Fig. 1 is the schematic diagram of device therefor of the present invention;
Valve opening-time plot that Fig. 2 is embodiment one when only using the PID control system;
Gas flow-time plot that Fig. 3 is embodiment one when only using the PID control system;
Valve opening-time plot that Fig. 4 is embodiment two when only using the PID control system;
Gas flow-time plot that Fig. 5 is embodiment two when only using the PID control system;
Valve opening-time plot that Fig. 6 is embodiment three when only using the PID control system;
Gas flow-time plot that Fig. 7 is embodiment three when only using the PID control system;
Parts, position and numbering among the figure: fuel gas source 1, air source 2, PID control system 3, gas flow control valve 4, stop valve 5, air flow rate adjustment valve 6, burner 7.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the present invention includes following steps:
A, the aperture of gas flow control valve 4 and air flow rate adjustment valve 6 when at first recording temperature and pressure and stablize; Aperture when temperature and pressure described herein is stablized is the aperture of technological requirement, and process conditions are relevant with production environment and product.
B, before burning, the 80%-100% of aperture when the aperture of gas flow control valve 4 and air flow rate adjustment valve 6 is set to temperature and pressure and stablizes.
C, burn and move PID control system 3, PID control system 3 is according to the variation of load and operating mode, utilize gas flow control valve 4 and 6 pairs of fuel of air flow rate adjustment valve and air mass flow to increase or reduce, adjust the temperature deviation of temperature and appearance, thereby make whole combustion process reach smooth combustion, whole system just can reach the smooth combustion state in operation PID control system 3 backs thus fast near the smooth combustion state when just taking fire.
For the ease of gas flow control valve 4 and air flow rate adjustment valve 6 are controlled, in the B step, flue gas flow control valve and air flow rate adjustment valve 6 are regulated by the PLC control system.Carry out pretravel when being provided with, adopting the PLC control system can reach required pretravel fast and accurately.Help raising the efficiency and stabilized combustion system.
Embodiment one
With zinc-plated combustion system is example, and its gas flow control valve 4 calibers are 100mm; The caliber of air flow rate adjustment valve 6 is 400mm; Gas flow control valve 4 is 25% with the aperture of air flow rate adjustment valve 6 when temperature and pressure is stablized, and the gas flow under this aperture is 200M
3/ H, air mass flow is 800M
3/ H.According to the following steps combustion system is controlled:
A, before burning gas flow control valve 4 and air flow rate adjustment valve 6 apertures are transferred to 25%, the gas flow control valve 4 of this process and air flow rate adjustment valve 6 are by the control of PLC control system.
B, burn and move PID control system 3, PID control system 3 is according to the variation of load and operating mode, utilize gas flow control valve 4 and 6 pairs of fuel of air flow rate adjustment valve and air mass flow to increase or reduce, adjust the temperature deviation of temperature and appearance, thereby make whole combustion process reach smooth combustion.PID control system 3 is controlled gas flow control valve 4 and air flow rate adjustment valve 6 according to the technology of routine.
Gas flow control valve 4 between the combustion system of using the present embodiment method and the combustion system of only using PID control system 3 changes to contrast with the aperture of air flow rate adjustment valve 6 sees Fig. 2, as seen from Figure 2, use the combustion system of default aperture and PID control system 3 to reach stable state 5 seconds left and right sides apertures, be aperture 25%, and only use the combustion system of PID control system 3 just to reach stable 26 seconds left and right sides apertures.This gas flow of wherein bringing changes sees Fig. 3, uses the combustion system of default aperture and PID control system 3 to reach stationary value 200M 7 seconds left and right sides gas flows
3/ H, and only use the combustion system of PID control system 3 to reach stationary value 27 seconds left and right sides gas flows.Stable the stable of whole technological parameter that indicate of gas flow.According to the regulation scheme of present embodiment, can shift to an earlier date 20 seconds and reach stable state, avoided at incipient stage combustion instability and insufficient, reduce combustion fluctuation, improve the security of burning.Owing to shortened the time of labile state greatly, made the quality of product be improved.
Embodiment two
Even to move back unit bringing-up section combustion system is example, and its gas flow control valve 4 calibers are 100mm; The caliber of air flow rate adjustment valve 6 is 400mm; Gas flow control valve 4 is 20% with the aperture of air flow rate adjustment valve 6 when temperature and pressure is stablized, and the gas flow under this aperture is 150M
3/ H, air mass flow is 600M
3/ H.According to the following steps combustion system is controlled:
A, before burning gas flow control valve 4 and air flow rate adjustment valve 6 apertures are transferred to 16%, be 80% of aperture when stablize, the gas flow control valve 4 of this process is controlled by the PLC control system with air flow rate adjustment valve 6.
B, burn and move PID control system 3, PID control system 3 is according to the variation of load and operating mode, utilize gas flow control valve 4 and 6 pairs of fuel of air flow rate adjustment valve and air mass flow to increase or reduce, adjust the temperature deviation of temperature and appearance, thereby make whole combustion process reach smooth combustion.PID control system 3 is controlled gas flow control valve 4 and air flow rate adjustment valve 6 according to the technology of routine.
Present embodiment and only use the aperture of gas flow control valve 4 and air flow rate adjustment valve 6 between the combustion system of PID control system 3 to change contrast and see Fig. 4, its gas flow changes contrast and sees Fig. 5.The present embodiment aperture reaches stable state about 4 seconds, gas flow reaches stable state about 5 seconds.And the combustion system aperture of only using PID control system 3 reached stable state at 15 seconds, and gas flow reached stable state at 17 seconds.According to the regulation scheme of present embodiment, can shift to an earlier date 12 seconds and reach stable state.
Embodiment three
Even to move back unit bringing-up section combustion system is example, and its gas flow control valve 4 calibers are 80mm; The caliber of air flow rate adjustment valve 6 is 300mm; Gas flow control valve 4 is 30% with the aperture of air flow rate adjustment valve 6 when temperature and pressure is stablized, and the gas flow under this aperture is 120M
3/ H, air mass flow is 480M
3/ H.According to the following steps combustion system is controlled:
A, before burning gas flow control valve 4 and air flow rate adjustment valve 6 apertures are transferred to 28%, be 93.3% of aperture when stablize, the gas flow control valve 4 of this process is controlled by the PLC control system with air flow rate adjustment valve 6.
B, burn and move PID control system 3, PID control system 3 is according to the variation of load and operating mode, utilize gas flow control valve 4 and 6 pairs of fuel of air flow rate adjustment valve and air mass flow to increase or reduce, adjust the temperature deviation of temperature and appearance, thereby make whole combustion process reach smooth combustion.PID control system 3 is controlled gas flow control valve 4 and air flow rate adjustment valve 6 according to the technology of routine.
Present embodiment and only use the aperture of gas flow control valve 4 and air flow rate adjustment valve 6 between the combustion system of PID control system 3 to change contrast and see Fig. 6, its gas flow changes contrast and sees Fig. 7.The present embodiment aperture reaches stable state about 4 seconds, gas flow reaches stable state about 5 seconds.And the combustion system aperture of only using PID control system 3 reached stable state at 32 seconds, and gas flow reached stable state at 33 seconds.According to the regulation scheme of present embodiment, can shift to an earlier date 28 seconds and reach stable state.
Claims (4)
1. combustion system flow control methods may further comprise the steps:
A, the aperture of gas flow control valve and air flow rate adjustment valve when at first recording temperature and pressure and stablize;
B, before burning, the 80%-100% of aperture made combustion gas burn under this aperture when the aperture of gas flow control valve and air flow rate adjustment valve was set to temperature and pressure and stablizes;
C, burn and move the PID control system, the PID control system is according to the variation of load and operating mode, utilize gas flow control valve and air flow rate adjustment valve that fuel and air mass flow are increased or reduces, adjust the temperature deviation of temperature and appearance, thereby make whole combustion process reach smooth combustion.
2. combustion system flow control methods as claimed in claim 1 is characterized in that: in the B step, when the aperture of gas flow control valve and air flow rate adjustment valve is set to temperature and pressure and stablizes 100% of aperture.
3. combustion system flow control methods as claimed in claim 1 is characterized in that: in the B step, when the aperture of gas flow control valve and air flow rate adjustment valve is set to temperature and pressure and stablizes 93.3% of aperture.
4. as claim 1,2 or 3 described combustion system flow control methods, it is characterized in that: in the B step, flue gas flow control valve and air flow rate adjustment valve are regulated by the PLC control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010510518A CN101949549B (en) | 2010-10-18 | 2010-10-18 | Flow control method of combustion system |
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| CN201010510518A CN101949549B (en) | 2010-10-18 | 2010-10-18 | Flow control method of combustion system |
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| CN101949549B CN101949549B (en) | 2011-12-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363804A (en) * | 2013-07-29 | 2013-10-23 | 中冶长天国际工程有限责任公司 | Method and system for controlling flow of sintering ignition furnace |
| CN107121996A (en) * | 2017-07-04 | 2017-09-01 | 南京信息工程大学 | A kind of constant temperature and humidity control device and control method |
| CN112032773A (en) * | 2020-08-10 | 2020-12-04 | 中山百得厨卫有限公司 | Intelligent stove control method and intelligent stove |
| CN114060841A (en) * | 2021-11-02 | 2022-02-18 | 中国船舶重工集团公司第七0三研究所 | Boiler fuel oil pressure difference control method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130317A (en) * | 1988-11-07 | 1990-05-18 | Osaka Gas Co Ltd | Gas burning system |
| EP0644376A1 (en) * | 1993-09-22 | 1995-03-22 | Landis & Gyr Business Support AG | Method for controlling a burner |
| CN1351700A (en) * | 1999-04-26 | 2002-05-29 | 燃烧器系统气体种类识别技术利用公司 | Device for adjusting oxidation agent/fuel mixture in feeding pipe of burner |
| WO2006000366A1 (en) * | 2004-06-23 | 2006-01-05 | Ebm-Papst Landshut Gmbh | Method for regulating and controlling a firing apparatus, and firing apparatus |
| CN2761978Y (en) * | 2004-11-26 | 2006-03-01 | 济南钢铁股份有限公司 | Heat value stabilizing control device of mixed gas |
| CN200940836Y (en) * | 2006-08-14 | 2007-08-29 | 中冶京诚工程技术有限公司 | Pulse controller of burner |
| JP2008138973A (en) * | 2006-12-04 | 2008-06-19 | Sumitomo Heavy Ind Ltd | Boiler control device and boiler control method |
| CN101691930A (en) * | 2009-10-20 | 2010-04-07 | 云南航天工业总公司 | Output power control method of combustion apparatus |
-
2010
- 2010-10-18 CN CN201010510518A patent/CN101949549B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02130317A (en) * | 1988-11-07 | 1990-05-18 | Osaka Gas Co Ltd | Gas burning system |
| EP0644376A1 (en) * | 1993-09-22 | 1995-03-22 | Landis & Gyr Business Support AG | Method for controlling a burner |
| CN1351700A (en) * | 1999-04-26 | 2002-05-29 | 燃烧器系统气体种类识别技术利用公司 | Device for adjusting oxidation agent/fuel mixture in feeding pipe of burner |
| WO2006000366A1 (en) * | 2004-06-23 | 2006-01-05 | Ebm-Papst Landshut Gmbh | Method for regulating and controlling a firing apparatus, and firing apparatus |
| CN2761978Y (en) * | 2004-11-26 | 2006-03-01 | 济南钢铁股份有限公司 | Heat value stabilizing control device of mixed gas |
| CN200940836Y (en) * | 2006-08-14 | 2007-08-29 | 中冶京诚工程技术有限公司 | Pulse controller of burner |
| JP2008138973A (en) * | 2006-12-04 | 2008-06-19 | Sumitomo Heavy Ind Ltd | Boiler control device and boiler control method |
| CN101691930A (en) * | 2009-10-20 | 2010-04-07 | 云南航天工业总公司 | Output power control method of combustion apparatus |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103363804A (en) * | 2013-07-29 | 2013-10-23 | 中冶长天国际工程有限责任公司 | Method and system for controlling flow of sintering ignition furnace |
| CN103363804B (en) * | 2013-07-29 | 2014-11-26 | 中冶长天国际工程有限责任公司 | Method and system for controlling flow of sintering ignition furnace |
| CN107121996A (en) * | 2017-07-04 | 2017-09-01 | 南京信息工程大学 | A kind of constant temperature and humidity control device and control method |
| CN112032773A (en) * | 2020-08-10 | 2020-12-04 | 中山百得厨卫有限公司 | Intelligent stove control method and intelligent stove |
| CN114060841A (en) * | 2021-11-02 | 2022-02-18 | 中国船舶重工集团公司第七0三研究所 | Boiler fuel oil pressure difference control method |
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