生物质燃料成份对生物质流化床燃烧的影响

Biomass Composition Combustion Performance in CFB Boilers

基于流化床的生物质燃烧技术应用日益广泛。生物质燃料流化床的缺点是容易产生床体结焦。灰的组分和生物质燃料中的硫、氯是影响流化床锅炉烧结倾向、锅炉污染速率、灰沉积过程、结焦和过热器腐蚀的主要因素。以灰成分为基础划分生物质燃料,可分为具有显著的不同燃烧特性的3类。在实践的基础上,阐述了各类生物质燃料及其灰分特性,以及在流化床燃烧中的特点。

The technologies based on fluidized bed biomass combustion are becoming increasingly popular.Biomass-fired CFB may suffer from bed agglomeration.Ash composition together with sulfur and chlorine contents in biomass fuels are the main factors having an impact on the risk of bed agglomeration in fluidized bed boilers,and on the rate of boiler fouling,deposit formation,slagging,and superheater corrosion.On the basis of ash composition,the biomass fuels can be divided into three groups having significant differences in combustion.This paper reviews in light of experience what are the main differences in fuel and ash properties and how the fuels from each group can be fired in CFB boilers.