State Key Laboratory of Coal Combustion;
Huazhong University of Science and Technology;
Wuhan 430074;
China;
School of Energy and Power Engineering;
Huazhong University of Science and Technology;
Wuhan 430074;
China;
Guangdong Yudean Zhanjiang Biomass Power Plant;
Zhanjiang 524300;
China;
ash deposition; biomass combustion; circulating fluidized bed; initial layer; structure analysis;