旋涡流化床悬浮段气固悬浮流试验研究

Experimental Study of Gas/Solid Suspension Flows in Vortexing Fluidized Bed Chamber Freeboard

Gas flows and particle mass fluxes were measured and elutriation experiments were conducted in two cold test models of vortexing fluidized bed.The tests show that the secondary air injected tangentially creates strong vortexes,establishes particle suspension lay- ers and internal circulation,and suppresses elutriation of fine particles greatly.The vortexing fluidized bed combustion has bright application prospect because of its much higher combus- tion and desulphidation efficiency than bubbling fluidized bed combustion due to long parti- cle residence time and large slip velocity between gas and solid,and its simpler configuration and lower cost than circulating fluidized bed combustion.