300 MW CFBB掺烧城市污泥和秸秆最大比例计算与分析

Calculation and analysis on the maximum ratio of city sludge and straw in 300 MW CFBB

文章以燃烧70种无烟煤的Lurgi型和DEC型300 MW循环流化床锅炉(CFBB)为研究对象,计算并分析了掺烧北京酒仙桥污泥和昌平产玉米秆、顺义产小麦秆的最大掺烧比例ψmax(%)与锅炉炉型、无烟煤发热量、锅炉负荷率的定量关系。研究结果表明:锅炉负荷率越高,ψmax越高;无烟煤发热量越高,ψmax越高;Lurgi型CFBB的ψmax比DEC型CFBB的ψmax高;锅炉运行过程中具体的掺烧比例ψmax应根据CFBB运行的安全性、烟气污染物排放浓度等条件决定。

Study on 70 spices of anthracites fired in Lurgi and DEC type 300 MW CFBB, the ψmax （%）, maximum blend ratio of Beijing Jiuxianqiao sludge, Changping corn straw and Shunyi wheat straw and its relationship with boiler type, anthracites calorific value and boiler rating ratio were calculated and analyzed： Results reveal that ψmax increases with boiler rating increasing, with anthracites calorific value improving, the ψmax of Lurgi CFBB is higher than DEC CFBB. During operation of CFBB, the ψmax will be determined by the operation safety and pollution emission concentration of flue gas of CFBB.