CN102607049A - Technology for combusting pulverized coal fed by circulating air for industrial boiler - Google Patents
Technology for combusting pulverized coal fed by circulating air for industrial boiler Download PDFInfo
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- CN102607049A CN102607049A CN2012100863223A CN201210086322A CN102607049A CN 102607049 A CN102607049 A CN 102607049A CN 2012100863223 A CN2012100863223 A CN 2012100863223A CN 201210086322 A CN201210086322 A CN 201210086322A CN 102607049 A CN102607049 A CN 102607049A
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Abstract
The invention relates to process for combusting pulverized coal fed by secondary air for an industrial boiler. The process is characterized in that high-temperature flue gas at the tail of the boiler is recycled, heat loss of the boiler due to the fact that pulverized coal is fed by constant-temperature air is reduced, accordingly, heat efficiency of the boiler is greatly improved, emission of harmful gases including CO2 and the like is reduced, and energy conservation and emission reduction of the boiler are realized.
Description
Technical field
The present invention relates to a kind of combustion of industrial boiler technology, be specifically related to a kind of Industrial Boiler circulated air powder combustion technology of delivering coal.
Background technology
China's coal-burned industrial boiler has a large capacity and a wide range, and the whole nation is with more than 50 ten thousand of Industrial Boiler recoverable amounts, and about 1,800,000 steam ton/hour.About 480,000 of coal-burning boiler accounts for about 85% of Industrial Boiler total amount, average size about 3.4 steam ton/hour, wherein 20 steam ton/hour below surpass 80%.240,000 of coal-burned industrial boilers are arranged in 113 prevention and control of air pollution key cities approximately, 900,000 steaming tons/hour, all account for 1/2. of the whole nation.Industrial Boiler is mainly used in fields such as factory power, building and heating, about 400,000,000 tons of annual consumption raw coal.
China's coal-burned industrial boiler efficient is low, pollutes to weigh, and energy-saving potential is huge.Boiler design efficient is 72%-80%, the about 60%-65% of average operating efficiency, and average operating efficiency is than low 15-20 percentage point of external advanced level; About 2,000,000 tons of annual discharging flue dust, about 6,000,000 tons of sulfur dioxide is the second largest coal-smoke pollution source that is only second to firepower electrical plant.
There is subject matter in coal-burned industrial boiler: the separate unit boiler capacity is little, and equipment is outmoded aging; The boiler average load is less than 65%, " low load with strong power "; The Automatic Control of Boiler level is low, and coal combustion equipment and subsidiary engine quality are low; Use coal and design coal does not match, the quality instability; Lack skilled professional operating personnel; Pollution control facility is simple and crude, and majority is not installed or the off-duty desulfurizer, and disposal of pollutants is serious; Energy-conservation supervision and management omission etc.
Summary of the invention
The present invention has overcome the defective that above-mentioned Industrial Boiler exists; Purpose is for discharge of harmful gases such as the operational efficiency that improves boiler, the combustion system (grate firing combines with Boiling Combustion) that changes boiler, the flue gas heat loss that reduces boiler, minimizing C02, is a kind of coal-burned industrial boiler power-saving technology efficiently.
The Industrial Boiler circulated air of the present invention powder combustion technology technology of delivering coal:
(1), mentioning from the high-temperature flue gas of boiler flue gas outlet to air-introduced machine section;
(2), adopt high temperature resistant air-introduced machine (blast: 500-300000Pa, air quantity: 1000-100000m3/h) smoke the high-temperature flue gas that is fit to pulverized coal conveying amount demand air pressure air flow;
(3), the temperature of high-temperature flue gas is between 150-900 ℃;
(4), the high-temperature flue gas of gathering is mainly used in the boiler coal-ash needed air pressure air flow that burns.
The Industrial Boiler circulated air powder combustion technology technology of delivering coal:
(1), utilize the high-temperature flue gas of Industrial Boiler self that coal dust (containing colm) is sent into the burner hearth burning;
(2), the mode of the defeated coal dust of high-temperature flue gas is that pipeline is carried.
Adopt the Industrial Boiler circulated air of the present invention powder combustion technology of delivering coal to have vast market prospect; This The Application of Technology all can produce tremendous influence to the operational efficiency that improves China's coal-burned industrial boiler, the realization energy-saving and emission-reduction that cut down the consumption of energy, and the project implementation time is short, little, the instant effect of investment.
Description of drawings
Fig. 1 is the Industrial Boiler circulated air powder combustion technology process chart of delivering coal.
1, boiler body 2, exhanst gas outlet 3, economizer 4, deduster 5, water mill deduster 6, air-introduced machine 7, high-temperature flue gas pipeline 8, high temperature draught fan 9, power transportation pipe
The specific embodiment
Below in conjunction with specific embodiment, the present invention is further specified.Should be understood that following examples only are used to the present invention is described but not are used to limit scope of the present invention.
The Industrial Boiler circulated air of the present invention powder combustion technology technology of delivering coal is achieved in that
(1), utilizes high temperature draught fan 8 random opening between boiler flue gas outlet 2 to boiler induced-draft fan 6 to extract 150-900 ℃ of high-temperature flue gas coal dust is sent into boiler furnace through conveyance conduit 9;
(2), air inducing pipeline and convey coal pipe all adopt insulation not scatter and disappear to guarantee flue-gas temperature;
(3), select the required blast of defeated coal dust amount, the high temperature draught fan of air quantity according to the size of boiler tonnage.
Claims (3)
1. the Industrial Boiler circulated air powder combustion technology of delivering coal is characterized in that: the deliver coal processing step of powder of coal-burning boiler afterbody high-temperature flue gas circulated air is:
(1), mentioning from the high-temperature flue gas of boiler flue gas outlet to air-introduced machine section;
(2), adopt high temperature resistant air-introduced machine (blast: 500-300000Pa, air quantity: 1000-100000m3/h) smoke the high-temperature flue gas that is fit to pulverized coal conveying amount demand air pressure air flow;
(3), the temperature of high-temperature flue gas is between 150-900 ℃;
(4), the high-temperature flue gas of gathering is mainly used in the boiler coal-ash needed air pressure air flow that burns.
2. the Industrial Boiler circulated air according to claim 1 powder combustion technology technology of delivering coal, it is characterized in that: described burning process process is:
(1), utilize the high-temperature flue gas of Industrial Boiler self that coal dust (containing colm) is sent into the burner hearth burning;
(2), the mode of the defeated coal dust of high-temperature flue gas is that pipeline is carried.
3. the Industrial Boiler circulated air according to claim 1 powder combustion technology technology of delivering coal; It is characterized in that:, select to be fit to the required air pressure air flow of pulverized coal conveying according to the required coal dust amount of bunker coal total amount consumed between 10%-50% of tonnage size of Industrial Boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100863223A CN102607049A (en) | 2012-03-20 | 2012-03-20 | Technology for combusting pulverized coal fed by circulating air for industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100863223A CN102607049A (en) | 2012-03-20 | 2012-03-20 | Technology for combusting pulverized coal fed by circulating air for industrial boiler |
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| Publication Number | Publication Date |
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| CN102607049A true CN102607049A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100863223A Pending CN102607049A (en) | 2012-03-20 | 2012-03-20 | Technology for combusting pulverized coal fed by circulating air for industrial boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141950A (en) * | 2014-07-18 | 2014-11-12 | 华南理工大学 | Device and method for reducing discharging of boiler NOx in powder mode |
| CN109539245A (en) * | 2018-10-30 | 2019-03-29 | 西安交通大学 | A kind of pulverized coal preheating solution decoupling combustion device |
| CN113280362A (en) * | 2021-05-21 | 2021-08-20 | 张晓辉 | High-efficient buggy industrial boiler |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62190316A (en) * | 1986-12-11 | 1987-08-20 | Kawasaki Heavy Ind Ltd | Combustion method for coal |
| CN101021316A (en) * | 2007-03-14 | 2007-08-22 | 哈尔滨工业大学 | Method and device of denitration utilizing biomass direct burning and re-burning as well as smoke gas recirculating technology |
| CN101839476A (en) * | 2010-06-22 | 2010-09-22 | 华中科技大学 | Method for micro positive pressure oxygen-enriched combustion of pulverized coal |
| CN201715533U (en) * | 2010-07-13 | 2011-01-19 | 杭州电子科技大学 | Powder feeding device of pulverized coal boiler at power station |
| CN102047040A (en) * | 2008-03-06 | 2011-05-04 | 株式会社Ihi | Method of controlling flow rate of primary recirculating exhaust gas in oxygen combustion boiler and apparatus therefor |
-
2012
- 2012-03-20 CN CN2012100863223A patent/CN102607049A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62190316A (en) * | 1986-12-11 | 1987-08-20 | Kawasaki Heavy Ind Ltd | Combustion method for coal |
| CN101021316A (en) * | 2007-03-14 | 2007-08-22 | 哈尔滨工业大学 | Method and device of denitration utilizing biomass direct burning and re-burning as well as smoke gas recirculating technology |
| CN102047040A (en) * | 2008-03-06 | 2011-05-04 | 株式会社Ihi | Method of controlling flow rate of primary recirculating exhaust gas in oxygen combustion boiler and apparatus therefor |
| CN101839476A (en) * | 2010-06-22 | 2010-09-22 | 华中科技大学 | Method for micro positive pressure oxygen-enriched combustion of pulverized coal |
| CN201715533U (en) * | 2010-07-13 | 2011-01-19 | 杭州电子科技大学 | Powder feeding device of pulverized coal boiler at power station |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141950A (en) * | 2014-07-18 | 2014-11-12 | 华南理工大学 | Device and method for reducing discharging of boiler NOx in powder mode |
| CN109539245A (en) * | 2018-10-30 | 2019-03-29 | 西安交通大学 | A kind of pulverized coal preheating solution decoupling combustion device |
| CN113280362A (en) * | 2021-05-21 | 2021-08-20 | 张晓辉 | High-efficient buggy industrial boiler |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |