液固外循环流化床换热器主压降的实验研究

Experimental study of the main pressure drop in liquid solid external circulation fluidized bed heat exchanger

以喷嘴为颗粒循环装置的液固外循环流化床换热器为研究对象,考察颗粒直径、口径比、喷嘴安装位置、颗粒初始加入量及流体黏度对主压降的影响,得出了稳定操作情况下,液固外循环流化床换热器主压降与上述因素之间的经验关联式,计算值与实验值吻合较好,为外循环流化床换热器的设计计算提供依据。

An experimental apparatus of the liquid solid external circulating fluidized bed heat exchanger （LSECFBE）, which made use of nozzle as the particle circulating device, was established. An experiment for a wide range of variables by independently varying the conditions was carried out. The effects of liquid flow rate, nozzle diameter, nozzle position, particle diameter, initial charge of solids and liquid viscosity on the main pressure drop were studied. On the basis of these factors, an empirical equation for the main pressure drop was established. The values calculated from the empirical equation agreed well with the experimental values. It provides some theoretical information for the optimal design of the LSECFBE.