水平液固循环流化床起旋器的实验研究

Experimental study of spiral flow generator in liquid-solid horizontal circulating fluidized bed

在φ29 mm×4 200 mm流化床装置上,利用CCD图像测量与数据处理系统在线对导流叶片式局部起旋器对水平液固循环流化床内固相颗粒分布特性的影响进行了研究。结果表明:安装局部起旋器后,颗粒分布状况在一定距离内得到明显改善;但随着轴向距离增加,起旋器作用效果减弱。随着导叶包角、液体流速的增加,颗粒固含率不均匀度减小。对于相同直径的颗粒,密度和初始加入量越大,颗粒固含率不均匀度越大。

An experiment was made of the particles distribution of each section of a single-loop solids circulation system in a φ29 mm × 4 200 mm cold liquid-solid horizontal circulating fluidized bed test facility. The CCD image measurement and data processing system was used to study the particles distribution at different operating conditions with the spiral flow generator added. The experiment shows that the spiral pipe flow generator arranged in the liquid-solid horizontal circulating fluidized bed can effectively improve the uniform distribution of particles in a certain distance; but as the axial distance increases, the effect of the spiral flow generator weakened. There was a low non-uniform distribution as the guide vane angle and liquid flow rate increased. For the particle with the same diameter, density and initial volume add the larger the solid particles containing the greater rate of non-uniform degrees.