Dynamic behavior of tobacco waste in the coal-fired fluidized-bed boiler
Circulating fluidized bed (CFB) technology is an advanced method for utilizing coal and other solid fuels in an environmentally acceptable manner.During the processing procedure in the nicotiana tabacum plants,lots of tobacco stem wastes are produced,which are normally being dumped to the landfill field.If this kind of waste can be used as a part of the fuel to be added into the coal in a CFB combustor,it will reduce the use of coal and then cut the net carbon emissions.To understand the complicated fluid dynamics of nicotiana tabacum wastes in the coalfired CFB boiler,the mixing and segregation behavior of tobacco stalk are preliminary measured in a cylindrical fluidized bed.Obvious segregation behavior is found due to distinct differences in density and shape between tobacco stem and coal,which results in poor fluidization quality and bad combustion efficiency.To overcome this disadvantage,a jet with high gas velocity is introduced through the air distributor and a detailed experimental study is conducted in a fluidized bed made up of stem-sand mixture with different solid components at various jet velocities,which greatly improve the mixing performance of stem in the fluidized bed.The above findings are helpful for the technological upgrading of small- or middle-sized CFB boiler with adding tobacco stem into coal.
binary mixture with biomass fluidization behavior jet penetration depth
Kai Zhang Bangting Yu Jian Chang Honggang Chen Yongping Yang
National Eng lab for Biomass Power Generation Equipment,North China lectric Power University,Beijing State Key Laboratory of Heavy Oil Processing,China University of etroleum,Beijing,102249,China National Eng lab for Biomass Power Generation Equipment,North China Electric Power University,Beijin
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
103-107
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）