大型电站燃煤锅炉多环芳烃排放特性  

The Polycyclic Aromatic Hydrocarbons Emission Character in the Large-scale Power Plant Boiler

作　　者：尹雪峰[1] 李晓东[1] 陆胜勇[1] 尤孝方[1] 谷月玲[1] 严建华[1] 倪明江[1] 岑可法[1] 

机构地区：[1]能源清洁利用国家重点实验室(浙江大学),浙江省杭州市310027

出　　处：《中国电机工程学报》2007年第5期1-6,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(N50576082)。~~

摘　　要：采用烟气等速取样方法在浙江某电厂2座蒸汽容量为1000t/h和2000t/h的燃煤电站锅炉进行电除尘器前后烟气和飞灰中多环芳烃分布的研究,给出了多环芳烃的浓度和排放因子,并对烟气净化装置对多环芳烃的脱除效率进行了观察。结果显示:电除尘出口处多环芳烃的排放因子在2.93～18.2μg/kg煤之间;电除尘器入口处的烟气中多环芳烃总生成量随着锅炉负荷量的增加而呈减少趋势,产物中以四环和五环的多环芳烃居多;The polycyclic aromatic hydrocarbons（PAHs） distribution character of the flue gas and fly ash emitted from electrostatic precipitator in two coal-firing boilers with the steam capacity 1000t/h and 2000t/h have been studied in a power plant of PR. Zhejiang based on isoknetic sampling method. PAHs concentrations and PAHs emission factors were determined. In addition, the PAHs removal efficiencies of air pollution control devices were also included. The result show that measured total PAHs emission factors are between 2.93 and 18.2 ug/kg feedstock; The total PAHs content in the flue gas of electrostatic precipitator inlet decrease with the boiler charge increasing; The forming PAHs is mainly the 4-ring and 5-ring species; The total-PAHs content in the fly ash of electrostatic precipitator inlet increases with the boiler charge increasing and the PAHs content of fly ash varies widely in every electric field. The PAHs distribution character in the flue gas of the electrostatic precipitator outlet sharply contrasts with the inlet, which shows the removed effect of electrostatic precipitator to PAHs is selective.

关 键 词：电站锅炉 多环芳烃 电除尘器 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]