新型抽吸型气-液分流式分布器的性能

开发了一种新型气 液分流式分布器,采用冷模实验装置考察了气体操作线速度和液体线速度分别在0~619 cm/s和018~044 cm/s范围时分布器安装高度差对液体分布的影响,并与工业上使用的泡罩式分布器对比。结果表明,由于气 液经由独立的通道,有着恒定的流通面积,气 液分流式分布器对塔板倾斜的敏感度较低,且随气速的增大不断减小;当气体线速度超过3 cm/s、气/液流量比大于10时,该分布器分布不均匀度可降至10%,接近均匀分布。采用计算流体力学软件模拟了单个分布器抽吸过程,得到各相体积分数和速度分布等值线等流场结构。

Performance of a New Gas-Pumped Gas-Liquid Separated Flow Distributor

A new type of gas-liquid separated flow distributor was developed based on the gas pumping induced flow, and compared with the traditional bubble cap distributor in terms of resistance to tray levelness and liquid distribution under the operation conditions of gas velocity in the range of 0-619 cm/s and liquid velocity in the range of 018-044 cm/s. The results showed that the sensitivity to tray unlevelness was low,and decreased with the increase of gas velocity, due to the separated channels and constant flow areas. The liquid could be distributed uniformly as the unevenness decreased to 10%, when the gas velocity was higher than 3 cm/s, gas/liquid flow ratio of 10. Computational fluid dynamics was used to simulate the suction process to get phase volume fraction and velocity field.