CN102269419A - Method and system for increasing powder preparation boiler smoke temperature of power station boiler - Google Patents
Method and system for increasing powder preparation boiler smoke temperature of power station boiler Download PDFInfo
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- CN102269419A CN102269419A CN2011101901942A CN201110190194A CN102269419A CN 102269419 A CN102269419 A CN 102269419A CN 2011101901942 A CN2011101901942 A CN 2011101901942A CN 201110190194 A CN201110190194 A CN 201110190194A CN 102269419 A CN102269419 A CN 102269419A
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Abstract
The invention discloses a method and a system for increasing the powder preparation boiler smoke temperature of a power station boiler. A hot boiler smoke reheating device is arranged in a boiler reversing chamber, and heats medium-and-low temperature boiler smoke and then the heated boiler smoke is used as a drying medium of a power preparation system; the medium-and-low temperature boiler smoke can be smoke from an inlet and an outlet of an air preheater, an inlet and outlet of a dust remover, an inlet and an outlet of a boiler draught fan, or an inlet and an outlet of a desulfurizer, and mixture of the medium-and-low temperature boiler smoke and boiler hot air can be heated and is used as a drying medium of the powder preparation system. In the system and the method, the medium-and-low temperature boiler smoke (or the mixture of the medium-and-low temperature boiler smoke and hot air) is conveyed to the heating device arranged in the boiler reversing chamber through a pipeline, is heated, is conveyed to the powder preparation system and is used as the drying medium so as to help to improve the dry capacity of the boiler powder preparation system, control the content of oxygen entering the powder preparation system, and improve the explosion proof capacity of the power preparation system.
Description
Technical field
The present invention relates to a kind of raising station boiler powder process stove cigarette method of temperature and device.
Background technology
Hot blast is the important process medium of station boiler pulverized coal preparation system, combustion system, it is heated is the important step of generating plant pulverized coal boiler work, the temperature levels of hot blast and oxygen amount height directly influence performance performance pulverized coal preparation system and combustion system, and the explosion-proof ability of pulverized coal preparation system and the NOx discharging of boiler are had material impact.It is very favourable to the explosion-proof ability and the NOx growing amount in the reduction combustion process that improve pulverized coal preparation system as the drying medium and the coal dust pumped (conveying) medium of pulverized coal preparation system to adopt the relatively low stove cigarette of oxygen consuming amount.Higher stove cigarette temperature can be improved the drying of pulverized coal preparation system and exerts oneself, thereby can make pulverized coal preparation system can grind the coal of more high-moistures, and is remarkable to the coal adaptability effect that enlarges boiler.
Tradition hot blast heating means are by the air preheater that is arranged on the boiler back end ductwork normal temperature air that the external world imports to be heated to uniform temperature, hot blast temperature is generally than low tens degree of air preheater entrance flue gas temperature, and the design of air preheater inlet flue gas temperature is limited in below 400 degree usually, all hot blast temperatures generally have only more than 300 degree centigrade, be difficult to bring up to higher temperature, this makes boiler when the burning high-moisture coal, and the pulverized coal preparation system drying is usually exerted oneself not enough, influences unit on-load ability; When using air to grind high volatile coal,, influence the security of unit operation owing to the higher accident of easily blasting of oxygen concentration as dry, defeated powder medium.Extract low-temperature furnace smoke and improve its temperature as the pulverized coal preparation system drying medium, can improve the drying of pulverized coal preparation system significantly and exert oneself and explosion-proof ability by the heating back.
Summary of the invention
The object of the present invention is to provide and a kind ofly when promoting pulverized coal preparation system drying medium temperature, reduce oxygen concentration, integral body improve that the boiler milling system drying is exerted oneself and and explosion-proof performance, and help to reduce the raising station boiler powder process stove cigarette method of temperature and the device of NOx growing amount.
For achieving the above object, the method that the present invention adopts is: by being arranged in the hot stove cigarette reheat machine in the boiler reversal chamber, the flue gas of centering low-temperature furnace smoke heating back is as the pulverized coal preparation system drying medium, also can add simultaneously pine for low-temperature furnace smoke and boiler hot blast mixture as the pulverized coal preparation system drying medium.
The inventive system comprises: be furnished with hot stove cigarette reheat machine in the reversal chamber before the later back-end ductwork heating surface of boiler platen superheater and high temperature superheater, hot-air pipeline, middle low-temperature furnace smoke export pipeline are connected with the entrance pipe of hot stove cigarette reheat machine, in the middle low-temperature furnace smoke that extracts of low-temperature furnace smoke pipeline or in low pest cigarette and the logical superheater cigarette reheat machine entrance pipe of mixture from the boiler hot blast of hot-air pipeline, send into heating temperature raising in the hot stove cigarette reheat machine, logical then superheater cigarette reheat machine export pipeline output is used for pulverized coal preparation system.
The present invention utilizes boiler reversal chamber space to arrange hot stove cigarette reheat machine, heats to low-temperature furnace smoke or with the mist of hot blast and improves the cigarette temperature.Because reversal chamber cigarette temperature is generally about 700 degree, therefore hot stove cigarette temperature can be brought up to more than 400 degree.To stove cigarette heating back beyond example, be a kind of technological innovation as the pulverized coal preparation system drying medium.
Low-temperature furnace smoke can from the air preheater import export or deduster be imported and exported or boiler induced-draft fan is imported and exported in of the present invention, or the flue gas of desulfurizer import and export.
The present invention can obviously improve the pulverized coal preparation system drying and exert oneself, and enlarges pulverized coal preparation system coal accommodation, simultaneously explosion-proof ability that also can pulverized coal preparation system and reduce the NOx discharging of boiler.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing patent of the present invention is described in further detail.
Referring to Fig. 1, be furnished with hot stove cigarette reheat machine 5 in the reversal chamber 3 of the present invention before the later back-end ductwork heating surface of boiler platen superheater 1 and high temperature superheater 2, will (can be from the air preheater import export by the middle low-temperature furnace smoke that middle low-temperature furnace smoke pipeline 8 extracts, or deduster is imported and exported, or boiler induced-draft fan is imported and exported, or the flue gas of desulfurizer import and export), or add pine for low-temperature furnace smoke with from the mixture of the boiler hot blast of hot-air pipeline 7 mist as the pulverized coal preparation system drying medium, by stove cigarette reheat machine entrance pipe 6, send into heating temperature raising in the hot stove cigarette reheat machine 5, by 4 outputs of heater export pipeline, use then for pulverized coal preparation system.
Claims (2)
1. raising station boiler powder process stove cigarette method of temperature, it is characterized in that: by being arranged in the hot stove cigarette reheat machine in the boiler reversal chamber, the flue gas of centering low-temperature furnace smoke heating back is as the pulverized coal preparation system drying medium, also can add simultaneously pine for low-temperature furnace smoke and boiler hot blast mixture as the pulverized coal preparation system drying medium.
2. device that improves station boiler powder process stove cigarette temperature, it is characterized in that: be furnished with hot stove cigarette reheat machine (5) in the reversal chamber (3) before the later back-end ductwork heating surface of boiler platen superheater (1) and high temperature superheater (2), hot-air pipeline (7), middle low-temperature furnace smoke export pipeline (8) is connected with the entrance pipe (6) of hot stove cigarette reheat machine (5), in the middle low-temperature furnace smoke that extracts of low-temperature furnace smoke pipeline (8) or in low pest cigarette and the logical superheater cigarette reheat machine entrance pipe (6) of mixture from the boiler hot blast of hot-air pipeline (7), send into heating temperature raising in the hot stove cigarette reheat machine (5), logical then superheater cigarette reheat machine export pipeline (4) output is used for pulverized coal preparation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101901942A CN102269419A (en) | 2011-07-08 | 2011-07-08 | Method and system for increasing powder preparation boiler smoke temperature of power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101901942A CN102269419A (en) | 2011-07-08 | 2011-07-08 | Method and system for increasing powder preparation boiler smoke temperature of power station boiler |
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| Publication Number | Publication Date |
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| CN102269419A true CN102269419A (en) | 2011-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101901942A Pending CN102269419A (en) | 2011-07-08 | 2011-07-08 | Method and system for increasing powder preparation boiler smoke temperature of power station boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135458A (en) * | 2015-08-26 | 2015-12-09 | 烟台龙源电力技术股份有限公司 | Method and apparatus for improving furnace temperature of cyclone furnace |
| CN112555884A (en) * | 2020-12-10 | 2021-03-26 | 西安西热锅炉环保工程有限公司 | System and method for controlling W flame boiler double-inlet double-outlet steel ball-milling bituminous coal blending combustion proportion |
Citations (5)
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| CN1312446A (en) * | 2001-03-30 | 2001-09-12 | 王金 | Hot air and exhaust switching adjustment powder making and feeding combustion system |
| US20080229985A1 (en) * | 2004-07-09 | 2008-09-25 | Mario Magaldi | Integrated System For the Extraction of Heavy Ash, Conversion Thereof Into Light Ash and Reduction of Unburnt Matter |
| CN101358735A (en) * | 2008-09-27 | 2009-02-04 | 东北电力科学研究院有限公司 | Explosion-proof processing method of medium-storage type bituminous coal boiler and special system thereof |
| CN101893370A (en) * | 2010-07-07 | 2010-11-24 | 华北电力大学（保定） | System adopting high concentration CO2 flue gas as coal dust drying medium in boiler |
| CN202188521U (en) * | 2011-07-08 | 2012-04-11 | 西安热工研究院有限公司 | Device capable of improving temperature of pulverizing flue gas of power station boiler |
-
2011
- 2011-07-08 CN CN2011101901942A patent/CN102269419A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1312446A (en) * | 2001-03-30 | 2001-09-12 | 王金 | Hot air and exhaust switching adjustment powder making and feeding combustion system |
| US20080229985A1 (en) * | 2004-07-09 | 2008-09-25 | Mario Magaldi | Integrated System For the Extraction of Heavy Ash, Conversion Thereof Into Light Ash and Reduction of Unburnt Matter |
| CN101358735A (en) * | 2008-09-27 | 2009-02-04 | 东北电力科学研究院有限公司 | Explosion-proof processing method of medium-storage type bituminous coal boiler and special system thereof |
| CN101893370A (en) * | 2010-07-07 | 2010-11-24 | 华北电力大学（保定） | System adopting high concentration CO2 flue gas as coal dust drying medium in boiler |
| CN202188521U (en) * | 2011-07-08 | 2012-04-11 | 西安热工研究院有限公司 | Device capable of improving temperature of pulverizing flue gas of power station boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135458A (en) * | 2015-08-26 | 2015-12-09 | 烟台龙源电力技术股份有限公司 | Method and apparatus for improving furnace temperature of cyclone furnace |
| CN112555884A (en) * | 2020-12-10 | 2021-03-26 | 西安西热锅炉环保工程有限公司 | System and method for controlling W flame boiler double-inlet double-outlet steel ball-milling bituminous coal blending combustion proportion |
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Application publication date: 20111207 |