摘要
In this study, two types of pre-distributors (nonuniform-pores and dual-baffle)for the combined solids-liquid distributor in gas-liquid-solid circulating fluidized bed heat exchanger, were designed and the characteristics of particles distribution was compared. In the experiments, the sampling method was used to measure local solids flux and a U shape pipe was used to measure static pressure drop in the lower pipe box.The effects of different superficial liquid velocities and liquid viscosities on the parameters mentioned above were investigated.The degree of distribution of local solids flux in exchanger pipe was evaluated by the non-uniformity function.The results showed that the two types of pre-distributors were both suitable for gas-liquid-solid circulating fluidized bed heat exchanger at a lower static pressure drop in the lower pipe box.Compared with the nonuniform-pores pre-distributor, the dual-baffle pre-distributor showed better performance.
In this study, two types of pre-distributors （nonuniform-pores and dual-baffle） for the combined solids-liquid distributor in gas-liquid-solid circulating fluidized bed heat exchanger, were designed and the characteristics of particles distribution was compared. In the experiments, the sampling method was used to measure local solids flux and a U shape pipe was used to measure static pressure drop in the tower pipe box. The effects of different superficiat tiquid vetocities and tiquid viscosities on the parameters mentioned above were investigated. The degree of distribution of local solids flux in exchanger pipe was evaluated by the non-uniformity function. The results showed that the two types of pre-distributors were both suitable for gas-liquid-solid circulating fluidized bed heat exchanger at a lower static pressure drop in the lower pipe box. Compared with the nonuniform-pores pre-distributor, the dual-baffle pre-distributor showed better performance.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第1期31-35,共5页
CIESC Journal
关键词
气液固循环流化床
换热器
固液预分布器
颗粒质量循环速率
下管箱静压降
gas-liquid-solid circulating fluidized bed
exchanger
solid-liquid pre-distributor
solid flux
static pressure drop in the lower pipe box
