EXPERIMENTAL STUDY OF GAS—SOLID SUSPENSION FLOWS IN VORTEXING FLUIDIZED BED CHAMBER FREEBOARD  

作　　者：赵长遂 朱皑强 G.Yang S.Nieh 

机构地区：[1]Thermoenergy Engineering Research Institute [2]The Catholic University of America

出　　处：《Journal of Southeast University(English Edition)》1991年第1期24-31,共8页东南大学学报（英文版）

摘　　要：Gas flows and particle mass flux were measured and clutriation experimentswere conducted in two cold test models of vortexing fluidized bed(VFB).The experimen-tal results show that the secondary air injected tangentially creates strong vortexes,estab-lishes particle suspension layers and internal circulation,and suppresses the elutriation offine particles greatly.The vortexing fluidized bed combustion has bright prospect bccauseof its much higher combustion efficiency and desulphidation efficiency than bubblingfluidized bed combustion due to long particle residence time and high slip velocity betweengas and solid,and its simpler configuration and lower cost than circulating fluidized bedcombustion.Gas flows and particle mass flux were measured and clutriation experiments were conducted in two cold test models of vortexing fluidized bed(VFB).The experimen- tal results show that the secondary air injected tangentially creates strong vortexes,estab- lishes particle suspension layers and internal circulation,and suppresses the elutriation of fine particles greatly.The vortexing fluidized bed combustion has bright prospect bccause of its much higher combustion efficiency and desulphidation efficiency than bubbling fluidized bed combustion due to long particle residence time and high slip velocity between gas and solid,and its simpler configuration and lower cost than circulating fluidized bed combustion.

关 键 词：combustion fluidized bed/vortexing fluidized BED frecboard suspension layer mass flux ELUTRIATION SWIRL number 

分 类 号：G64[文化科学—高等教育学]