CN103712224A - Method for increasing boiler coal pulverized system output - Google Patents
Method for increasing boiler coal pulverized system output Download PDFInfo
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- CN103712224A CN103712224A CN201310720253.1A CN201310720253A CN103712224A CN 103712224 A CN103712224 A CN 103712224A CN 201310720253 A CN201310720253 A CN 201310720253A CN 103712224 A CN103712224 A CN 103712224A
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Abstract
The invention relates to the field of high-temperature and high-pressure boilers, in particular to a method for increasing boiler coal pulverized system output. The method is characterized in that the left side and the right side of a high-temperature economizer in a boiler tail smoke channel are respectively provided with a pipeline which is led to two coal mills, so that extracted high-temperature boiler smoke cooperates with other air doors of a coal pulverized system to adjust the hot air temperature together, the hot air temperature can be rated 330 DEG C, the pipelines are made of high-temperature resistant steel, the diameter of each pipeline is not smaller than 700 millimeters, and the pipelines are provided with smoke channel electric doors and pressure adjusting doors. Compared with the prior art, the method has the advantages that improved coal pulverized system output is obviously improved, the drying hot air temperature of the coal mills reaches the rated 330 DEG C, electric consumption amount is obviously lowered, and operation of the coal pulverized system is safer; the boiler smoke system can be flexibly and reliably switched with an original hot air drying system for operation; through increase of smoke circulation amount, emission amount of NOx of a boiler can be properly lowered, and the environment protection effect is good.
Description
Technical field
The present invention relates to high-temperature high-pressure boiler field, relate in particular to a kind of method that boiler milling system is exerted oneself that increases.
Background technology
Operation area, energy source and power head factory North has the high-temperature high-pressure boiler of two cover 220T/H at present, this boiler model is SG220/9.8-M295, two boilers were subject to moisture in coal large while moving in recent years, the impacts such as ageing equipment hydraulic performance decline, in actual motion, coal pulverizer dry-heat air temperature does not reach 330 ℃ of design, only have 240 ℃ of left and right, pulverized coal preparation system power consumption increases and the wretched insufficiency of exerting oneself, cause boiler for a long time in underrun state, bring huge hidden danger to boiler safety stable operation, cannot meet steam pipe system user's quantity of steam simultaneously, bring baptism to whole Anshan iron and steel plant steam pipe system production run in winter, the serious energy-saving and cost-reducing work that restricts power plant.
Summary of the invention
The object of this invention is to provide a kind of method that boiler milling system is exerted oneself that increases, energy-saving and cost-reducing, reach the large load operation requirement of boiler, improve the power efficiency of pulverized coal preparation system, hot blast temperature is met design requirement.
For achieving the above object, technical scheme of the present invention is:
A kind ofly increase the method that boiler milling system is exerted oneself, the pipeline that each side arranges at boiler tail high-temperature economizer place flue is sent into respectively two coal pulverizers, with extracting high-temperature stove cigarette and other air doors of pulverized coal preparation system, jointly regulate hot blast temperature, make hot blast temperature reach specified 330 ℃.The material of described pipeline is high-temperature steel, and its diameter is not less than 700 millimeters, and pipeline is provided with flue Electrically operated gate and pressure regulation door.
The regulating step of described pipeline is as follows:
1) pulverized coal preparation system normal after, standard-sized sheet flue Electrically operated gate, slowly opening pressure adjustment doors is to standard-sized sheet, adjust the hot air disperser of pulverized coal preparation system coal pulverizer, keep between coal pulverizer inlet negative pressure maintain-450Pa～-500Pa, the adjusting that should guarantee both sides pipeline is synchronous, avoids one-sided operation to cause flow of flue gas in flue to be offset;
2) observe the inlet temperature rise of coal pulverizer, the aperture of hot air disperser is not less than 35%, keeps 325 ℃～335 ℃ of coal pulverizer inlet temperature, adjusts feeder revolution, controls coal pulverizer outlet temperature at 55 ℃～70 ℃; After feeder revolution promotes, should open large hot air disperser, with the ascendant trend of balance coal pulverizer inlet temperature;
3) in the operation of stove cigarette system input, keep coal pulverizer primary air pressure to be stabilized in 1200Pa～1300Pa, when point stove or blowing out are ventilated, pipeline need be followed pulverized coal preparation system and be purged, after ventilation finishes, and complete shut-down flue Electrically operated gate and pressure regulation door.
Compared with prior art, the invention has the beneficial effects as follows: 1) the rear pulverized coal preparation system of transformation is exerted oneself and obviously improved, coal pulverizer dry-heat air temperature has reached 330 ℃ of design, electrisity consumption obviously declines, pulverized coal preparation system operation is simultaneously safer, and every boiler load is increased to 160t/h by original 130t/h, and two boilers can increase load 60t/h, preposition like this back pressure unit is per hour just can enter 60 tons of steam, multiple electric 6000kW per hour more.2) stove cigarette system can with former hot air drying system flexibility and reliability ground switchover operation, can guarantee that pulverized coal preparation system oxygen content is not more than 14%, improved the explosion-proof ability of pulverized coal preparation system.3), by increasing flue gas recirculation amount, can appropriateness reduce boiler NO
xdischarge capacity, environment protecting is good.
Accompanying drawing explanation
Fig. 1 is boiler milling system flue part-structure schematic diagram of the present invention.
In figure: the wall 4-pipeline one 5-right-side wall 6-pipeline two 7-flue Electrically operated gate one 8-pressure regulation door one 9-flue Electrically operated gate two 10-pressure regulation door two 11-1# coal pulverizer 12-2# coal pulverizer 13-hot air dispersers of 1-high-temperature economizer 2-flue 3-left side
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
See Fig. 1, it is boiler milling system flue part-structure schematic diagram of the present invention, in high-temperature economizer 1 place flue 2, on the left side wall 3 of flue 2, establish pipeline 1, in the right-side wall 5 of flue 2, establish pipeline 26, pipeline 1 is provided with flue Electrically operated gate 1 and pressure regulation door 1, and pipeline 26 is provided with flue Electrically operated gate 29 and pressure regulation door 2 10, pipeline 1 removes 1# coal pulverizer 11, and pipeline 26 removes 2# coal pulverizer 12.
The method that increase boiler milling system of the present invention is exerted oneself, regulates hot blast temperature together with other air doors of high-temperature flue gas and pulverized coal preparation system (as hot air disperser 13) that make exactly pipeline 1 and pipeline 26 extract jointly, makes hot blast temperature reach specified 330 ℃.Wherein the material of pipeline 1 and pipeline 26 is high-temperature steel making, and its diameter is not less than 700 millimeters.
In the present invention, the regulating step of pipeline 1 and pipeline 26 is as follows:
1) pulverized coal preparation system normal after, standard-sized sheet flue Electrically operated gate, slowly opening pressure adjustment doors is to standard-sized sheet, adjust recirculation door and the hot air disperser of pulverized coal preparation system, keep between coal pulverizer inlet negative pressure maintain-450Pa～-500Pa, need to guarantee both sides system synchronization, avoid one-sided operation to cause flow of flue gas in flue to be offset, cause the phenomenon of washing away of heating surface;
2) observe the inlet temperature rise of coal pulverizer, the aperture of hot air disperser is not less than 35%, keeps 325 ℃～335 ℃ of coal pulverizer inlet temperature, adjusts feeder revolution, controls coal pulverizer outlet temperature at 55 ℃～70 ℃, prevents explosion of Coal Pulverizing System; After feeder revolution promotes, should open large hot air disperser, with the ascendant trend of balance coal pulverizer inlet temperature;
3) in the operation of stove cigarette system input, keep coal pulverizer primary air pressure to be stabilized in 1200Pa～1300Pa, when point stove or blowing out are ventilated, pipeline need be followed pulverized coal preparation system and be purged, after ventilation finishes, and complete shut-down flue Electrically operated gate and pressure regulation door.
Claims (3)
1. one kind increases the method that boiler milling system is exerted oneself, it is characterized in that, the pipeline that each side arranges at boiler tail high-temperature economizer place flue is sent into respectively two coal pulverizers, with extracting high-temperature stove cigarette and other air doors of pulverized coal preparation system, jointly regulate hot blast temperature, make hot blast temperature reach specified 330 ℃.
2. a kind of method that boiler milling system is exerted oneself that increases according to claim 1, is characterized in that, the material of described pipeline is high-temperature steel, and its diameter is not less than 700 millimeters, and pipeline is provided with flue Electrically operated gate and pressure regulation door.
3. a kind of method that boiler milling system is exerted oneself that increases according to claim 1 and 2, is characterized in that, the regulating step of described pipeline is as follows:
1) pulverized coal preparation system normal after, standard-sized sheet flue Electrically operated gate, slowly opening pressure adjustment doors is to standard-sized sheet, adjust the hot air disperser of pulverized coal preparation system coal pulverizer, keep between coal pulverizer inlet negative pressure maintain-450Pa～-500Pa, the adjusting that should guarantee both sides pipeline is synchronous, avoids one-sided operation to cause flow of flue gas in flue to be offset;
2) observe the inlet temperature rise of coal pulverizer, the aperture of hot air disperser is not less than 35%, keeps 315 ℃～330 ℃ of coal pulverizer inlet temperature, adjusts feeder revolution, controls coal pulverizer outlet temperature at 55 ℃～70 ℃; After feeder revolution promotes, should open large hot air disperser, with the ascendant trend of balance coal pulverizer inlet temperature;
3) in the operation of stove cigarette system input, keep coal pulverizer primary air pressure to be stabilized in 1200Pa～1300Pa, when point stove or blowing out are ventilated, pipeline need be followed pulverized coal preparation system and be purged, after ventilation finishes, and complete shut-down flue Electrically operated gate and pressure regulation door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310720253.1A CN103712224A (en) | 2013-12-20 | 2013-12-20 | Method for increasing boiler coal pulverized system output |
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| CN201310720253.1A CN103712224A (en) | 2013-12-20 | 2013-12-20 | Method for increasing boiler coal pulverized system output |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108325730A (en) * | 2018-04-13 | 2018-07-27 | 中国神华能源股份有限公司 | The method and apparatus for controlling pulverized coal preparation system |
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| KR100868440B1 (en) * | 2002-07-03 | 2008-11-11 | 주식회사 포스코 | Apparatus for controlling exhaust gas of pulverizer coal production equipment of blast furence |
| CN101612605A (en) * | 2009-07-28 | 2009-12-30 | 义马环保电力有限公司 | Be applied to the programmed control method and the device of coal fired power generation unit boiler pulverized coal preparation system |
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| CN203099874U (en) * | 2013-03-19 | 2013-07-31 | 黑龙江省电力科学研究院 | System for improving drying capacity of intermediate-storage type milling system during coal type changing of boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108325730A (en) * | 2018-04-13 | 2018-07-27 | 中国神华能源股份有限公司 | The method and apparatus for controlling pulverized coal preparation system |
| CN108325730B (en) * | 2018-04-13 | 2020-02-14 | 中国神华能源股份有限公司 | Method and device for controlling pulverizing system |
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Application publication date: 20140409 |