FLOW CHARACTERISTICS OF CIRCULATING GAS-SOLID FLUIDIZED-BED HEAT-EXCHANGER WITH MULTIPLE VERTICAL PIPES

Flow characteristics of a circulating gas-solid fluidized-bed heat exc hanger with multiple vertical pipes were studied. The glass beads were circulated inside the vertical pipes of the heat exchanger with fluid izing air. The pressure drop and the circulation rate of solid particl es were measured. In addition, one-dimensional velocity distribution o f solid particles and the pressure distribution inside the vertical pi pe were analysed. The prediction on the pressure drop with the circula tion of solid particles was proved to be reasonably accurate by compar ing with the measured results. (C) 1998 John Wiley & Sons, Ltd.