CN1563804A - Ignition boosting methoe for gas boiler - Google Patents
Ignition boosting methoe for gas boiler Download PDFInfo
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- CN1563804A CN1563804A CN 200410012249 CN200410012249A CN1563804A CN 1563804 A CN1563804 A CN 1563804A CN 200410012249 CN200410012249 CN 200410012249 CN 200410012249 A CN200410012249 A CN 200410012249A CN 1563804 A CN1563804 A CN 1563804A
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Abstract
The present invention relates to the ignition and pressure lifting method for medium temperature and medium pressure gas burning boiler with coke oven gas as fuel. During ignition, lifting pressure and normal operation, hot blast baffle opening, blower baffle opening, induced draft fan baffle opening, gas regulating door opening and negative hearth pressure in the boiler are set and regulated, so as to control the inflammable gas density inside the boiler during ignition and lifting pressure below the explosion limit and to avoid boiler explosion accident. The ignition and pressure lifting method of the present invention is suitable for all types of gas burning boilers with PLC program controlled ignition system.
Description
Technical field
The present invention relates to a kind of igniting step-up method of boiler, particularly relate to a kind of coke-stove gas that adopts and make the middle temperature of fuel, the igniting step-up method of middle compression ignite gas boiler.
Background technology
The UG-35/3.82-Q boiler of being produced by the boiler factory, Wuxi is that first employing fuel of China is the middle temperature of low heat value, low-pressure coke-stove gas, middle compression ignite steam stove, and its thermal efficiency is up to more than 91%.This boiler is two drum lateral arrangement Natural Circulation chambers burners, the open-air layout, hearth portion is divided into fin panel casing, burner arrangement is on the lower furnace portion front wall, in the horizontal flue that extension, rear water wall top forms, arranged two-stage superheater, between last lower drum, arrange convection bank, in back-end ductwork, arranged main air preheater and one-level economizer.This boiler adopts the mode of face formula desuperheat to control steam exit temperature.Important technological parameters is: superheated steam pressure 3.82MPa, 450 ℃ of superheat steam temperatures, boiler output 35t/h.The DCS control system is adopted in the operation control and the adjusting of this boiler, has realized automatic control and adjusting that steam water-level, combustion chamber draft, superheated steam pressure, burner hearth burn.The PLC control program is adopted in ignition of the boiler, can realize program control and two kinds of sparking mode on the spot, and blowout protection adopts FSSS flame to detect control system, and whole combustion control system is the technology of XuZhou flaming control Institute.
This boiler is first production and use at home, the optimal parameter of can ignition of the boiler for reference in the same industry not boosting, cause in the use of boiler because the control of operating parameters such as combustion chamber draft, coal gas adjustment doors aperture is improper, combustible gas component in the gas fired-boiler surpasses explosion limit, cause furnace puff, production has brought many difficulties to boiler safety, when serious the accident of steelframe slight deformation has taken place also to cause convection pass to collapse.
Summary of the invention
The purpose of this invention is to provide a kind of igniting step-up method that gas fired-boiler uses that is suitable for, gas fired-boiler is lighted a fire and boosted, can avoid gas fired-boiler generation deflagration accident having, guarantee safety, the stable operation of boiler with this method.
By to the igniting of gas fired-boiler and the process validation trial of boosting, the final ignition of the boiler step-up method of determining is:
During igniting, in the purge stages of boiler, the hot-air damper aperture that boiler is set respectively is 25%～30%, and the pressure fan baffle opening is 35%～40%, and the air-introduced machine baffle opening is 10%～20%, and regulate combustion chamber draft be-80Pa～-100Pa; Wait to purge qualified after, adjust pressure fan baffle opening to 15%～25%, air-introduced machine baffle opening to 1%～10%, hot-air damper aperture to 10%～20%, combustion chamber draft is adjusted to-10Pa～-30Pa, start program control igniting; After the fire inspection has fire, the coal gas adjustment doors is opened to 3～5%; Behind the flameholding, the coal gas adjustment doors is opened gradually to 5～10%, adjust combustion chamber draft to-10Pa～-30Pa; After treating flameholding, in kind light a fire at opposite side.
In the intensification of boiler, the process of boosting, the aperture of coal gas adjustment doors is arranged between 10%～30%, the air-introduced machine baffle opening is between 20%～45%, the pressure fan baffle opening is between 25%～60%, the hot-air damper aperture between 25%～50%, regulate combustion chamber draft-45Pa～-65Pa between; The concrete process of boosting is: the 30min that boosts rises to 0.1MPa～0.2MPa with drum pressure, flushing water level meter; The 30min that boosts rises to 0.4MPa～0.6MPa with drum pressure, and blowdown once; The 30min that boosts rises to 0.8MPa～1.2MPa with drum pressure, carries out the blowdown second time; The 30min that boosts rises to 1.6MPa～2.0MPa with drum pressure; The 30min that boosts rises to drum pressure and furnace pressure power, carries out and furnace operating.In the increasing temperature and pressure process, the upper and lower temperature difference that guarantees the drum wall is less than 40 ℃, and heating rate remains on 1～1.5 ℃/min.
In boiler on-load and normal course of operation, the aperture of coal gas adjustment doors is arranged between 30%～40%, the air-introduced machine baffle opening is between 45%～60%, the pressure fan baffle opening is between 60%～100%, the hot-air damper aperture between 50%～100%, regulate combustion chamber draft still-45Pa～-65Pa between.
Boost control parameter and igniting step-up method of the igniting of determining according to the present invention lighted a fire to gas fired-boiler and boosted, and the imflammable gas in the gas fired-boiler can be controlled at below the explosion limit, thoroughly avoided the generation of boiler deflagration accident having.Through the pressure build-up test of repeatedly lighting a fire, the ratio of wind and coal gas satisfies the requirement of igniting fully in the boiler of igniting back, and boiler combustion is normal.
Igniting step-up method of the present invention is suitable for having any model gas fired-boiler of the program control ignition system of PLC.
The specific embodiment
It below is an implementation process that the UG-35/3.82-Q boiler that the boiler factory, Wuxi is produced is lighted a fire and boosted.
At first, in the purge stages of boiler, the aperture of hot-air damper is set to 30%, and the pressure fan baffle opening is set to 40%, and the air-introduced machine baffle opening is set to 16%, regulates combustion chamber draft to be-90Pa.Wait to purge 10 minutes qualified after, the pressure fan baffle opening is transferred to 20%, the air-introduced machine baffle opening transfers to 1.2%, the hot-air damper aperture transfers to 15%, combustion chamber draft transfers to-23Pa, starts program control igniting, when treating that the fire inspection has fire, adjustment doors to 5% turns on the gas-fire, behind the flameholding, the coal gas adjustment doors is opened gradually to 8%, adjusted combustion chamber draft simultaneously and be-24Pa, behind the flameholding, in kind opposite side is lighted a fire again.
Begin boiler heating behind the equal flameholding in both sides, boost, in the intensification of boiler, the process of boosting, the drum 30min that boosts, when pressure rises to 0.15MPa, flushing water level meter, the hot-air damper aperture is set to 26%, the pressure fan baffle opening is set to 28%, the air-introduced machine baffle opening is set to 20%, and combustion chamber draft is adjusted into-50Pa, and coal gas adjustment doors aperture is adjusted into 10%.The drum 30min that boosts, when pressure rises to 0.40MPa, periodical blowdown once, comprehensively check by the maintenance personal, and the hot-air damper aperture is set to 28%, and the pressure fan baffle opening is set to 30%, and the air-introduced machine baffle opening is set to 21%, combustion chamber draft is adjusted into-60Pa, and coal gas adjustment doors aperture is adjusted into 12%.The drum 30min that boosts when pressure rises to 1.0MPa, carries out the blowdown second time, the hot-air damper aperture is set to 31%, and the pressure fan baffle opening is set to 36%, and the air-introduced machine baffle opening is set to 26%, combustion chamber draft is adjusted into-55Pa, and coal gas adjustment doors aperture is adjusted into 16%.The drum 30min that boosts, when pressure rose to 1.8MPa, superheat steam temperature was 285 ℃, the hot-air damper aperture is set to 38%, and the pressure fan baffle opening is set to 45%, and the air-introduced machine baffle opening is set to 35%, combustion chamber draft is adjusted into-50Pa, and coal gas adjustment doors aperture is adjusted into 21%.The drum 30min that boosts, when pressure rises to 3.5MPa, superheat steam temperature is 442 ℃, the hot-air damper aperture is set to 45%, the pressure fan baffle opening is set to 54%, the air-introduced machine baffle opening is set to 40%, and combustion chamber draft is adjusted into-52Pa, and coal gas adjustment doors aperture is adjusted into 28%, the water inlet of adjustment attemperator, the control superheat steam temperature carries out and furnace operating after normal, and the hot-air damper aperture is set to 46%, the pressure fan baffle opening is set to 56%, the air-introduced machine baffle opening is set to 41%, and combustion chamber draft is adjusted into-56Pa, and coal gas adjustment doors aperture is adjusted into 29%.
In the intensification of whole boiler, the process of boosting, the upper and lower temperature difference that remains the drum wall is less than 40 ℃, and heating rate is 1～1.5 ℃/min.
And behind the stove, the boiler on-load, the hot-air damper aperture is set to 55%, and the pressure fan baffle opening is set to 65%, and the air-introduced machine baffle opening is set to 46%, and combustion chamber draft is adjusted into-54Pa, and coal gas adjustment doors aperture is adjusted into 31%.
After the normal operation of boiler, the hot-air damper aperture is set to 96%, and the pressure fan baffle opening is set to 98%, and the air-introduced machine baffle opening is set to 56%, and combustion chamber draft is adjusted into-55Pa, and coal gas adjustment doors aperture is adjusted into 36%.
Claims (4)
1, a kind of igniting step-up method of gas fired-boiler is characterized in that:
During igniting, the boiler purge stages, it is 25%～30% that boiler hot windshield plate aperture is set, and the pressure fan baffle opening is 35%～40%, and the air-introduced machine baffle opening is 10%～20%, regulate combustion chamber draft to be-80Pa～-100Pa; Purge qualified after, adjust pressure fan baffle opening to 15%～25%, air-introduced machine baffle opening to 1%～10%, hot-air damper aperture to 10%～20%, combustion chamber draft is adjusted to-10Pa～-30Pa, start program control igniting; After the fire inspection has fire, the coal gas adjustment doors is opened to 3～5%; Behind the flameholding, the coal gas adjustment doors is opened to 5～10%, adjust combustion chamber draft to-10Pa～-30Pa; Behind the flameholding, with quadrat method point opposite side fire;
When boosting, coal gas adjustment doors aperture is arranged between 10%～30%, and the air-introduced machine baffle opening is between 20%～45%, and the pressure fan baffle opening is between 25%～60%, the hot-air damper aperture between 25%～50%, regulate combustion chamber draft-45Pa～-65Pa between.
2, ignition of gas boiler step-up method according to claim 1 is characterized in that specifically the process of boosting is: the 30min that boosts, and drum pressure rises to 0.1MPa～0.2MPa, flushing water level meter; The 30min that boosts, drum pressure rises to 0.4MPa～0.6MPa, and blowdown is once; The 30min that boosts, drum pressure rises to 0.8MPa～1.2MPa, blowdown for the second time; The 30min that boosts, drum pressure rises to 1.6MPa～2.0MPa; The 30min that boosts, drum pressure rise to and furnace pressure power, carry out and furnace operating.
3, ignition of gas boiler step-up method according to claim 1 is characterized in that in the process of boosting, and the upper and lower temperature difference of drum wall is less than 40 ℃, and heating rate remains on 1～1.5 ℃/min.
4, ignition of gas boiler step-up method according to claim 1, when it is characterized in that boiler on-load and normal operation, coal gas adjustment doors aperture is arranged between 30%～40%, the air-introduced machine baffle opening is between 45%～60%, the pressure fan baffle opening is between 60%～100%, the hot-air damper aperture between 50%～100%, regulate combustion chamber draft-45Pa～-65Pa between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012249 CN1270124C (en) | 2004-04-19 | 2004-04-19 | Ignition boosting methoe for gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012249 CN1270124C (en) | 2004-04-19 | 2004-04-19 | Ignition boosting methoe for gas boiler |
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| Publication Number | Publication Date |
|---|---|
| CN1563804A true CN1563804A (en) | 2005-01-12 |
| CN1270124C CN1270124C (en) | 2006-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410012249 Expired - Fee Related CN1270124C (en) | 2004-04-19 | 2004-04-19 | Ignition boosting methoe for gas boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235658A (en) * | 2011-04-20 | 2011-11-09 | 华能国际电力股份有限公司海门电厂 | Hearth negative pressure control method and system for coal-fired generating unit draught fan driven by small steam turbine |
| CN101353579B (en) * | 2008-08-26 | 2011-12-14 | 武汉钢铁(集团)公司 | 7.63m coke oven negative pressure in-furnace furnace drying method |
| CN106016231A (en) * | 2016-06-29 | 2016-10-12 | 无锡锡能锅炉有限公司 | Operation method for gas boiler |
| CN112902137A (en) * | 2021-02-01 | 2021-06-04 | 中国神华能源股份有限公司国华电力分公司 | Automatic starting method and device for starting boiler |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012041A (en) * | 2010-04-28 | 2011-04-13 | 山东圣威新能源有限公司 | Negative pressure dynamic frequency conversion control device of boiler hearth |
-
2004
- 2004-04-19 CN CN 200410012249 patent/CN1270124C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353579B (en) * | 2008-08-26 | 2011-12-14 | 武汉钢铁(集团)公司 | 7.63m coke oven negative pressure in-furnace furnace drying method |
| CN102235658A (en) * | 2011-04-20 | 2011-11-09 | 华能国际电力股份有限公司海门电厂 | Hearth negative pressure control method and system for coal-fired generating unit draught fan driven by small steam turbine |
| CN106016231A (en) * | 2016-06-29 | 2016-10-12 | 无锡锡能锅炉有限公司 | Operation method for gas boiler |
| CN112902137A (en) * | 2021-02-01 | 2021-06-04 | 中国神华能源股份有限公司国华电力分公司 | Automatic starting method and device for starting boiler |
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| Publication number | Publication date |
|---|---|
| CN1270124C (en) | 2006-08-16 |
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