CN101575524B - Application of anti-fluctuation diffusion curve in gas collecting pipe diffusion control device of coke furnace - Google Patents
Application of anti-fluctuation diffusion curve in gas collecting pipe diffusion control device of coke furnace Download PDFInfo
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- CN101575524B CN101575524B CN 200810011285 CN200810011285A CN101575524B CN 101575524 B CN101575524 B CN 101575524B CN 200810011285 CN200810011285 CN 200810011285 CN 200810011285 A CN200810011285 A CN 200810011285A CN 101575524 B CN101575524 B CN 101575524B
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Abstract
The invention relates to an application of anti-fluctuation diffusion curve in the gas collecting pipe diffusion control device of a coke furnace. In the method, with a PLC control cabinet as the core, the motion of the diffusion valve executing mechanism of the gas collecting pipe is controlled through the continuous monitoring of the pressure of the gas collecting pipe, the fluctuation of the pressure is maintained within a reliable range, and the sequential motions of the associated ignition device, steam fire collection and smoke abatement valve and steam fire extinguishing valve are controlled, so that the igniter, the diffusion executing mechanism, the fire collection valve and the fire extinguishing valve execute corresponding matching motions according to certain logic. By establishing a set of effective mathematical model for pressure and diffusion control, the optimal scheme can be achieved, so that raw gas can be burnt at the torch burner and the diffused gas can be burnt without smoke. The invention has the advantages of rapid response, safety and reliability, good burning effect and environmental protection.
Description
Technical field
The present invention relates to a kind of diffusion of gas collecting pipe control method of coking industry.
Background technology
The energy and environmental problem have become the focus of world attention at present, and the development of coking field environmental protection technology is the perfect important symbol of modern coking technology.Simultaneously, the development of the automatic technologies such as computer control has all been played vital role at aspects such as raising labour productivity, improve the quality of products, reduce energy consumption and improvement pollutent.
The coke oven collecting main raw gas diffuses Application Areas and the process condition of control device: equipment be installed on the diffusion of gas collecting pipe pipe and the watch-keeping cubicle in; Coke oven in the situation that normal operation can the control collecting main pressure about 70Pa, in the situation that collecting main pressure is too high or blower fault coal gas can leak in a large number, contaminate environment, even cause coke oven to catch fire causing serious financial loss.The application that the coke oven collecting main raw gas diffuses control device has solved the discharging of excessive coal gas and coal gas has been burnt, and has protected environment, has also guaranteed the processing requirement that coke oven is worked in the certain pressure scope simultaneously.
Early stage coke oven is all adopting manually operation aspect coal gas discharging and the control pressure, its speed of response is slow, and human factor is many, and the work on the spot condition is poor, and is large to workman's hazard level; Simultaneously manual ignition's difficulty is large, can't guarantee the promptness of lighting a fire, even will not light, and is big for environment pollution.
Summary of the invention
The purpose of this invention is to provide a kind of anti-fluctuation and diffuse the application of curve in release control apparatus for coke oven gas collector; by the monitoring continuously of collecting main pressure being controlled the action of effuser diffusion valve topworks; keep the fluctuation of pressure in one section reliable scope; control simultaneously supporting portfire, steam and hold together the sequentially-operating of fiery smoke elimination valve, steam-smoothering valve; to reach preferred embodiment, be swift in response, safe and reliable; combustion efficacy is good, protection of the environment.
For achieving the above object, the present invention is achieved through the following technical solutions:
The application of curve in release control apparatus for coke oven gas collector diffused in anti-fluctuation; it is characterized in that; the method is take the PLC housing as core; by the monitoring continuously of collecting main pressure being controlled the action of effuser diffusion valve topworks; keep the fluctuation of pressure in one section reliable scope; control simultaneously supporting portfire; steam holds together fiery smoke elimination valve; the sequentially-operating of steam-smoothering valve; make lighter for ignition; diffuse topworks; hold together fiery valve; fire valve is carried out corresponding interoperation according to certain logic; set up the effective pressure of an Analysis of Nested Design and the mathematical model of diffusing control; to reach preferred embodiment; raw gas is lighted at flare tip burner place, diffused gas is carried out smokeless combustion.
Described mathematical model is: the upper limit on pressure high limit, the pressure, pressure low limit parameter can Set arbitrarilies, establish higher limit on the pressure, pressure high limit value, pressure low limit value, force value is respectively P3, P2, P1, P in good time:
(1) as the lasting 5s of P＞P3, the autoignition bleeding program start is opened diffusion valve, high energy ignition unit is started working simultaneously, diffusion valve can stop for 5 seconds automatically in opening procedure, make the flame stabilization on the ignition bleeding burner, opened fiery valve after the flame test rod detects flame 10s; If the flame test rod does not detect flame, system can be behind program start 60s reopen high energy ignition unit and close diffusion valve to ignition position and stop 2s, then open diffusion valve to standard-sized sheet, if do not detect yet flame, system will continue to repeat to drill work; Whether no matter next step detect flame, and program will open fiery valve, sends the chimes of doom of interval 3s;
(2) as the lasting 5s of P＜P1, stop working and diffuse program start, open at first rapidly fire valve, close simultaneously closed fiery valve, begin to close diffusion valve behind the time-delay 3s, close fire valve behind the diffusion valve complete shut-down 60s, diffuse end of processing.
Compare with domestic and international similar technology, the invention has the beneficial effects as follows: the mixing by increasing air and the mode of steam smoke-eliminating burning fully, reduce to pollute tremendous improvement arranged; By windsheild, steam hold together fire and the design of steady combustion ring flameholding and to external world environmental compatibility improvement has been arranged; In flame-out reliability assurance has been arranged by the design of steam-smoothering pipe; Reached 100% by high performance portfire at the igniting reliability; Reached intelligent full automatic control on the precise control promptness by being applied in of automatic technology; Reducing labour intensity and reducing on the labor force and substantially realized unattended operator scheme by time variable control; Diffusing curve design by anti-fluctuation has reached more than 98% in coke oven accidental state precise control rate.
Novelty of the present invention and creativeness are embodied in:
1) the burner theory is applied to the coke oven collecting main raw gas and diffuses control device, and it lights a fire reliably, fully burning, windproof, the characteristics that reduce radiation, steady combustion, anticreep fire, reliable fire extinguishing provide assurance for environment protecting and safety in production.
2) anti-fluctuation is diffused curve design and is applied to the coke oven collecting main raw gas and diffuses control device, three main set(ting)values of its curve can be revised according to user's practical experience, its curve model design can be with operation irregularity state and the malfunction shielding of some false appearances, reliability reaches 98%, effectively realize automatic relief according to effuser, changed technological operation pattern in the past.
3) the fully automated design is applied to the coke oven collecting main raw gas and diffuses control device, has directly reduced the pollution of raw gas to environment, has reduced simultaneously the labor force, has reduced labour cost, has eliminated safety in production hidden danger.
4) promotion prospect: be applicable to the transformation of newly-built coke oven and old-fashioned coke oven; under the policy that proposes the Sustainable development of energy-conserving and environment-protective in the 17th Session of the General Assembly instructs, under the advocating of countries in the world to environment protection, the coke oven collecting main raw gas diffuses control device and has wide promotion prospect.
Description of drawings
Fig. 1 is the structural representation of release control apparatus for coke oven gas collector;
Fig. 2 is the structural representation of burner;
Fig. 3 is that graphic representation is diffused in anti-fluctuation.
Embodiment
The below introduces the specific embodiment of the present invention in detail
Structure and the principle of work of 1 device
See Fig. 1, release control apparatus for coke oven gas collector, this device by burner 1, bleeder 15, lighter for ignition cabinet 5, housing 6, diffusion valve 11, diffusion valve topworks 12, hold together fiery valve 10, fire valve 9, pressure unit 13 and form, burner 1 is positioned at bleeder 15 tops, connects by large flange 8; Lighter for ignition cabinet 5 is connected by high-tension shielding cable 4 with burning torch 2 on the burner 1, holds together fiery valve 10 and connects burners and hold together fire tube 18 (Fig. 2), and fire valve connects burner fire extinguishing tube 19 (Fig. 2); Diffusion valve 11 is positioned at the junction of bleeder 15 and effuser 16, is connected with diffusion valve topworks 12, and the effuser 16 in bleeder 15 ingress is provided with pressure unit 13; Lighter for ignition cabinet 5, fire valve 9, hold together fiery valve 10, diffusion valve topworks 12, pressure unit 13 and be connected with housing 6 by tie cable 14.
On burner 1, also be provided with thermometric feeler lever 3, be connected with housing 6.
The coke oven collecting main raw gas diffuses the principle of work of control device: by the monitoring continuously of collecting main pressure being controlled the action of effuser diffusion valve topworks; keep the fluctuation of pressure in one section reliable scope; control simultaneously supporting portfire, steam and hold together the sequentially-operating of fiery smoke elimination valve, steam-smoothering valve; raw gas is lighted at flare tip burner place, and diffused gas is carried out smokeless combustion.
See Fig. 3, the upper limit on pressure high limit, the pressure, pressure low limit parameter can Set arbitrarilies, if higher limit, pressure high limit value, pressure low limit value, in good time force value are respectively P3, P2, P1, P on the pressure, P3～400 are that pressure high limit district, 0～P1 are the pressure low limit district for upper limit district, P2～P3 on the pressure, (time parameter in the following narration can be changed according to field condition).
If t3-t2＜5s; T8-t7＞5s; T11-t10＞5s.System will be through carrying out following work: t2～t3 period after judging and t6～t7 period is sent interval 1s buzzer in the pressure high limit district.The t7+5s point is the automatic ignition start-up point, and t10+5s stops to diffuse a little for flame-out.(t7+5s)～(t10+5s) hummer sends interval 2s buzzer in order to diffuse combustion phases the period.From then on the program of being not difficult to find out in the curve has been filtered as t2～t3 the fluctuation stage less than the 5s period, thereby has effectively reached the effect of anti-fluctuation.
(1) as the lasting 5s of P＞P3, the autoignition bleeding program start, open diffusion valve, high energy ignition unit start working (being generally 30s) simultaneously, diffusion valve can stop for 5 seconds automatically in opening procedure, make the flame stabilization on the ignition bleeding burner, after the flame test rod detects flame 10s, open fiery valve; If the flame test rod does not detect flame, system can be behind program start 60s reopen high energy ignition unit and close diffusion valve to ignition position and stop 2s, then open diffusion valve to standard-sized sheet, if do not detect yet flame, system will continue to repeat to drill work; Whether no matter next step detect flame, and program will open fiery valve, sends the chimes of doom (without flame detecting device, system is with not relight such as native system) of interval 3s.
(2) as the lasting 5s of P＜P1, stop working and diffuse program start, open at first rapidly fire valve, close simultaneously closed fiery valve, begin to close diffusion valve behind the time-delay 3s, close fire valve behind the diffusion valve complete shut-down 60s, diffuse end of processing.
The system that 2 coke oven collecting main raw gas diffuse control device forms and performance index:
2.1 burner:
See Fig. 1, burner, it comprises burning torch 2, windsheild 24, cylindrical shell 25, smooth combustion apparatus 17, holds together fire tube 18, fire extinguishing tube 19, cylindrical shell 25 is positioned at the exit of bleeder 15, be connected with bleeder 15 by large flange 8, smooth combustion apparatus 17 is positioned at cylindrical shell 25 tops, is semi-closed structure; Holding together fire tube 18 and fire extinguishing tube 19 is two arms being told by steam manifold, and arm one enters cylindrical shell 25 inside from cylindrical shell 25 bottoms, is divided into several arms that are evenly arranged, and to cylindrical shell top, is steam-smoothering pipe 19; Arm two enters the endless tube in cylindrical shell 25 exits, tells some little vapor-nozzles by endless tube, is positioned at the periphery of gas outlet, for holding together fire tube 18; Windsheild 24 is positioned at the mix flare burner outside, for around enclosed construction, the windsheild Main Function is to stop strong air directly to blow to the burner gas exit, and torch burning is played steady incendiary effect.Be provided with two burning torch mounting pipe at windsheild, burning torch 2 is installed in the burning torch mounting pipe, symmetry is installed on the windsheild 24.Also be provided with flame test rod mounting pipe on windsheild, the flame test rod adopts thermocouple thermometric mode.
1) in its selection, all adopts stainless steel 1Cr18Ni9Ti, satisfied high temperature resistant and erosion resistance;
2) structurally adopted the self-priming injection type, by coal gas flow and air that the injection of steam drives in the whole burner rises, cause burner circumference air to enter the combustion zone by burner below injection and form bottom-up air motion, make coal gas fully and air mixed, perfect combustion, the rigidity of raising flame;
3) the structurally steady combustion ring of employing design forms stable ignition source by its change gas flow rate and air flow line at the gas exit place, and guarantees steady fire, the anticreep fire action of whole burner;
4) structurally adopt the windsheild design, by forming a semi-enclosed zone in the bleeder periphery, coal gas is played windproof effect in root burning, guaranteed that most of coal gas lights and burn, also greatly reduce torch burning to the caloradiance of periphery;
5) structurally adopt steam to hold together the fire tube design, establish some little vapor-nozzles at mix flare burner gas exit place, the motion of the jet band moving air flow by high pressure steam further mixes air and perfect combustion with coal gas, simultaneously vapor stream formed stable locality protection flame stable and reduce the impact of extraneous wind direction, and the water vapor in the steam the flame high-temperature zone can with coal gas in the carbon component reaction generate " water-gas " coal gas fully burnt;
6) structurally adopt steam-smoothering pipe design, in the mix flare burner cylindrical shell, establish branched fire extinguishing tube, spray a large amount of steam in system during with Torch, in the mix flare burner cylindrical shell, form vapor film, flame by the time it is extinguished.
2.2 high energy ignition unit
High energy ignition unit is one of main body of whole system, is undertaking the groundwork of the reliability of lighting a fire.It comprises that lighter for ignition, special ignition cable, burning torch three parts form.Lighter for ignition has been equipped with special ignition device guard box when mounted, and its design parameter is as follows: operating voltage: 220V (AC); Working current: 4A; Spark frequency: 10 ± 2SPS; Energy: 6～20J; Working temperature :-40～85 ℃; Work period: 30/60s (on/off).The special ignition cable length is according to the configuration of actual design needs, and its bending radius is greater than 100mm, and its resistance value is less than 0.05 ohm, and heatproof is not less than 200 ℃.Burning torch adopts stainless steel and ceramic making to form, and the burning torch life-span is 200,000 sparks, high-temperature-resistant structure.
2.3PLC housing
The PLC housing is the core of whole system, the programming logic action of control whole system.Its control object has diffusion valve topworks, high energy igniter, holds together fiery valve, fire valve etc., its collection be the pressure signal of 4～20mA.Its concrete function is as follows:
1) but the numerical value of the upper limit, pressure low limit on the rational pressure high limit of PLC housing free setting, pressure, satisfy the needs of different user individual difference;
2) the PLC housing has corresponding pressure state to show, make the operator get information about system state;
3) the PLC housing is established the program control/manual switching, satisfies the needs of various operations;
4) the PLC housing is connected alarm in pressure high limit, reminds the operator to regulate the effuser gas pressure, establishes the voiceless sound button, can close the last the warning;
5) PLC housing (under the auto state) starts the automatic ignition program when upper limit is connected on pressure;
6) the PLC housing starts the flame-out program of diffusing that stops when pressure low limit is connected;
7) PLC housing (under the manual state) can be realized the single step operation of each equipment, adapts to on-the-spot multiple needs;
8) PLC housing (under the programmed state) is provided with quickly starting/stop button, is convenient to start fast automatic ignition program or the flame-out program of diffusing that stops;
9) the PLC housing can be presented on the operating panel by pilot lamp each equipment running status on the spot;
10) the PLC housing can adopt various PLC controls, and the man-machine interfaces such as upper computer, touch-screen can be set, and except independently becoming the system, also can be connected or communication with DCS or other higher level's Controlling System;
3 coke oven collecting main raw gas diffuse the practical application explanation of control device
The reliability of lighting a fire in actual applications: 100%; Steam-smoothering rate: 100%; Mix flare burner operator on when burning coke oven can finish near any work of periphery it; During flame without black smoke, do not take off fire, be not more than 45 degree at fresh gale and the following flame of fresh gale and vertical direction angle; Coke oven malfunction overdraft is regulated controllability: satisfy processing requirement fully; Automatization controllability: all adopt automatically control.
Claims (1)
1. the application of curve in release control apparatus for coke oven gas collector diffused in anti-fluctuation, it is characterized in that, the method is take the PLC housing as core, by the monitoring continuously of collecting main pressure being controlled the action of effuser diffusion valve topworks, keep the fluctuation of pressure in one section reliable scope, control simultaneously supporting portfire, steam holds together fiery smoke elimination valve, the sequentially-operating of steam-smoothering valve, make lighter for ignition, diffusion valve topworks, hold together fiery valve, fire valve is carried out corresponding interoperation according to certain logic, set up the effective pressure of an Analysis of Nested Design and the mathematical model of diffusing control, to reach preferred embodiment, raw gas is lighted at flare tip burner place, diffused gas is carried out smokeless combustion, the lighter for ignition cabinet, fire valve, hold together fiery valve, diffusion valve topworks, pressure unit is connected with the PLC housing by tie cable; Curve mathematic model is diffused in described anti-fluctuation: the upper limit on pressure high limit, the pressure, pressure low limit parameter can Set arbitrarilies, establish higher limit on the pressure, pressure high limit value, pressure low limit value, force value is respectively P3, P2, P1, P in good time;
(1) as the lasting 5s of P＞P3, the autoignition bleeding program start is opened diffusion valve, the lighter for ignition cabinet is started working simultaneously, diffusion valve can stop for 5 seconds automatically in opening procedure, make the flame stabilization on the burner, opened fiery valve after the flame test rod detects flame 10s; If the flame test rod does not detect flame, system can be behind program start 60s reopen the lighter for ignition cabinet and close diffusion valve to ignition position and stop 2s, then open diffusion valve to standard-sized sheet, if do not detect yet flame, system will continue to repeat to drill work; Whether no matter next step detect flame, and program will open fiery valve, sends the chimes of doom of interval 3s;
(2) as the lasting 5s of P＜P1, stop working and diffuse program start, open at first rapidly fire valve, close simultaneously closed fiery valve, begin to close diffusion valve behind the time-delay 3s, close fire valve behind the diffusion valve complete shut-down 60s, diffuse end of processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810011285 CN101575524B (en) | 2008-05-07 | 2008-05-07 | Application of anti-fluctuation diffusion curve in gas collecting pipe diffusion control device of coke furnace |
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| CN 200810011285 CN101575524B (en) | 2008-05-07 | 2008-05-07 | Application of anti-fluctuation diffusion curve in gas collecting pipe diffusion control device of coke furnace |
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| CN101575524A CN101575524A (en) | 2009-11-11 |
| CN101575524B true CN101575524B (en) | 2013-01-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB908791A (en) * | 1958-05-02 | 1962-10-24 | Wolff Jr Ges M B H G | Improvements in or relating to coke oven doors |
| EP0091584A2 (en) * | 1982-04-08 | 1983-10-19 | Gewerkschaft Schalker Eisenhütte | Coke oven with a system for withdrawing charge gases |
| CN2717965Y (en) * | 2004-06-29 | 2005-08-17 | 涟源钢铁集团有限公司 | Gas diffuse pipe with injecting tube |
| CN101003738A (en) * | 2007-01-09 | 2007-07-25 | 山西中元煤洁净技术有限公司 | Fully enclosed vertical coke oven |
-
2008
- 2008-05-07 CN CN 200810011285 patent/CN101575524B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB908791A (en) * | 1958-05-02 | 1962-10-24 | Wolff Jr Ges M B H G | Improvements in or relating to coke oven doors |
| EP0091584A2 (en) * | 1982-04-08 | 1983-10-19 | Gewerkschaft Schalker Eisenhütte | Coke oven with a system for withdrawing charge gases |
| CN2717965Y (en) * | 2004-06-29 | 2005-08-17 | 涟源钢铁集团有限公司 | Gas diffuse pipe with injecting tube |
| CN101003738A (en) * | 2007-01-09 | 2007-07-25 | 山西中元煤洁净技术有限公司 | Fully enclosed vertical coke oven |
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| CN101575524A (en) | 2009-11-11 |
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Free format text: FORMER OWNER: ACRE COKING + REFRACTORY ENGINEERING CO., LTD. Owner name: ACRE COKING AND REFRACTORY AUTOMATIC CO., LTD. Free format text: FORMER OWNER: ACRE COKING AND REFRACTORY AUTOMATIC SYSTEM CO., LTD. Effective date: 20100510 |
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Free format text: CORRECT: ADDRESS; FROM: 114002 NO.27 SHENGLI SOUTH ROAD, TIEDONG DISTRICT, ANSHAN CITY, LIAONING PROVINCE TO: 116023 NO.128, QIXIANLING GAONENG STREET, HIGH-TECH INDUSTRY PARK, DALIAN CITY, LIAONING PROVINCE |
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Effective date of registration: 20100510 Address after: Dalian high tech Industrial Park, 116023 Liaoning province Qixianling high-energy Street No. 128 Applicant after: ACRE Coking And Refractory Engineering Consulting Corporation, MCC Address before: 114002 No. 27 Shengli South Road, Anshan, Liaoning Applicant before: MCC Coking & Refractory Automation System Co., Ltd. Co-applicant before: ACRE Coking and Refractory Engineering Consulting Corporation, MCC |
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