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《Journal of Safety and Environment》 2005-04
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Boiler bag type dust-clearing technology and its application in coal fired power plant

YAO Qun, CHEN Long-shu, WEI Ming-rui, CHEN Zhi-wei, LIU Cheng(Wuhan Tiancheng Environmental Protection Science & Technology CO., LTD., Wuhan 430081, China)  
The paper aims to introduce the authors' research findings on one of the 863 programs "The High Efficiency Control Technique and System for Fine Particles of Flue Gas in Coal-burning Power Station Boiler". At the same time, it has analyzed the research and development of the neotype filting bag technology and the system structure. Actually, the research results have already been applied in the engineering practice of large coal-burning power stations, i.e. the application of technique for the flue gas in coal-burning power station boiler. First of all, the paper introduced the construction and the operating principle of the triturating and invention of the through-flow equalizing bag filter. Such pulse bag filter has adopted air intake and off-take device with straight-in and straight-out method, so as to form and lead air flow into preformed space by installing a splitter guide duct. The main features of the system include: short-distance circuitry, smooth air flow, low flowing rate, less resistant pressure from the equipment structure, prevention for scouring bags, reliable long operating life, etc. Based on the ESP to bag filter reform project in a large coal-burning power station, the technical data as shown in the paper has been worked out accurately, that is, (1) dust emission density of outlet 20 mg/Nm3; (2) equipment operating resistance pressure 1 200 Pa; (3) bags working life, 30 000 h; (4) equipment body leak-in rate about 1%. All the technical data are in conformity with the technical demand and arrived at satisfactory social efficiency and environmental protection demands. The through-flow equalizing bag filter is the SPEC deducting equipment developed by us in accordance with the contraposed boiler gas conditions in China coal-burning power station and the situation of China. This bag filter has highly purification efficiency, low system resistance pressure, safety in operation, facility inspection and upkeep, etc. Since the filter can operate safely under dust high rate condition, specially adapt to deducting highly active in large coal fired power station.
【CateGory Index】: X773
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