液体逆、并流蒸馏塔虚拟循环板效率数学模型

A Pseudo-recycle Model for Plate Efficiency of Distillation Towers with Liquids Flowing either Concurrently or Countercurrently

用虚拟循环模型导出的汽液逆流及并流接触板效率计算式能较实际地反映影响板效率的各种因素,尤其能反映雾沫夹带及泄漏影响下的板效率变化,从计算结果可见,这种方法与涡流扩散模型比较,更接近实验值。

An equation of plate efficiency is derived by using the pseudor-recycle model of a distillation tower with liquids flowing either concurrently or countercurrently. The equation can actually show the relevant lactors affecting the plate efficiency, especially the changes in plate effeciency when weeping and entrainment occur. The calculation results from these equations are more close to the exprimental ones, as compared with those from eddy diffusion model.