推算雾沫夹带对Lewis-3类塔板板效率影响的混合池模型  

The Effect of Liquid Entrainment on Distillation Efficiencies for LEWIS-3 Tray

作　　者：张红彦[1] 王树楹[2] 周荣琪[1] 段占庭[1] 

机构地区：[1]清华大学化学工程系,北京100084 [2]天津大学化学工程研究所,天津300072

出　　处：《计算机与应用化学》2001年第5期417-422,共6页Computers and Applied Chemistry

摘　　要：板效率估算对于整个精馏塔设计过程而言非常重要。由于塔内雾沫夹带的发生会对塔内的汽液传质产生影响。因此 ,准确地板效率估算必须考虑到雾沫夹带的作用。本文针对包含Lewis 3类塔板 (即板间气相完全不混合、板上液相部分混合的错流塔板 )的精馏塔 ,建立了新型混合池模型 ,以计算雾沫夹带对蒸馏效率的影响。利用该模型得到了不同操作条件下表观板效率的分析解。所得结果与Bennett关联式进行了比较。在λ0 =0 5 -3 0 ,E =0 4- 1 0 ,e0 =0 1- 0 5的范围内 ,本文模型与Bennett关联式的平均偏差为 5 6 % ,其中 83%以上数据的误差在 10Since liquid entrainment has an effect on the mass transfer and hydrolics in the tower, then it is necessary to take the effect into the tray efficiency calculation. In this paper a new type of mixing cell model is developed to calculate the distillation efficiencies when the liquid entrainment happens in the column where vapor completely unmixes between trays and liquid partially mixes on the tray. The analytical results are obtained, and compared with those of Bennett correlations in the range of λ 0=0 5-3 0,E=0 4-1 0,e 0=0 1-0 5. The average error between them is 5 6%, with 83% of the data within ±10%, which showes this new model is reliable.

关 键 词：精馏 塔板 雾沫夹带 液体返混 混合池 表观板效率 精馏塔 设计 

分 类 号：TQ051.81[化学工程]