DOWNCOMER MIXING AND ITS EFFECT ON DISTILLATION TRAY EFFICIENCY  

塔板降液管混合及其对板效率的影响(英文)

作　　者：张敏卿[1] 王忠诚[1] 张雅芝[1] 黄洁[1] 郑美茹[2] 

机构地区：[1]天津大学化学工程研究所 [2]天津石化公司机械研究所

出　　处：《Transactions of Tianjin University》1998年第1期19-25,共7页天津大学学报（英文版）

摘　　要：In this paper, the measurement of liquid mixing in a downcomer of segmental type of distillation column is presented. The extent of liquid mixing is calculated by means of a mixing pool model. The results indicate that liquid mixing in a downcomer is actually incomplete. It is a significant correction to the assumption of complete downcomer mixing or no downcomer mixing which is generally adopted in many distillation calculations. Besides, the present results are used in a two dimensional eddy diffusion model to calculate the distillation tray efficiency. It is shown that the assumption of complete downcomer mixing is closer to the actual situation than that of no downcomer mixing.对板式塔降液管内液体的混合进行测定，并用混合池模型对液体的混合程度进行计算．结果表明，降液管内液体实际处于不完全混合状态，这对目前板式塔模拟计算中普遍采用的降液管完全混合和完全不混合的假定是一个有意义的修正．进一步把这一结果应用到二维涡流扩散模型中，对塔板效率进行了计算，结果进一步表明，降液管完全混合的假定较完全不混合的假定更接近实际情况．

关 键 词：distillation tray downcomer mixing mixing pool model tray efficiency 

分 类 号：TK223.11[动力工程及工程热物理—动力机械及工程]