摘要
在沉降炉上进行生物质与煤的混烧试验,分析研究生物质与煤混烧对可吸入颗粒物(PM_10)的粒径分布、排放特性及其形貌的影响。试验结果表明:4种燃料混烧的PM_10排放仍为相似的双峰分布;混烧时燃烧过程明显分为脱挥发分和焦炭燃烧2个阶段;LPSA煤与锯末混烧时排放的PM_10浓度最低,并且当氧气含量增加时,PM_1.0(粒径最大不超过1.0μm的颗粒物)变化幅度较小,而PM_1.0+(粒径位于1.0～10μm之间的颗粒物)则有较大程度的增长;对于同一种煤与生物质混烧时,PM_10的形貌有相似之处。在0.1μm处LPSA煤与生物质混烧形成的细微颗粒物大多呈柱状,而PDSB煤与生物质则大多呈碎片块状;并且在4.3μm处除了各自原有的柱状或碎片状结构外,还出现了部分光滑圆球体颗粒结构。
Co-combustion of coal with biomass was carried out in a laboratory-scaled drop tube furnace to investigate the effect of co-combustion of biomass with coal on the inhaled particulate matters（PMi0） emissions, distribution and its morphology. The results showed that the PMI0 from the co-combustion of biomass with coal still had a similar bimodal distribution; the co-combustion process had two combustion stages including devolatilization and char combustion. In addition, the emission of PMi0 from the co-combustion of sawdust and LPSA coal was the least; and with the increasing of oxygen ratio, the PM1.0（particle size below 1.0μm） varied little, while PM1.0. （particle size between 1.0-10μm） increased significantly. For one coal co-combusted with biomass, the morphology of PM10 had some similarities. At Dp（the diameter of particle）--0.1μm, the morphology of particle from co- combustion of LPSA/biomass blends was mostly columnar and that from co-combustion PDSB/biomass blends was mainly massive; At Dp--4.3μm, both of them presented partly slick spherical particulate matters.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2007年第5期7-12,共6页
Proceedings of the CSEE
基金
国家自然科学基金项目(50325621)
国家重点基础研究专项经费资助项目(2002CB211602)~~
关键词
颗粒物
混烧
煤
生物质
particle matters
co-combustion
coal
biomass
