部分回流下十字旋阀塔板效率的研究  

The study of mass transfer performance for the cross-type valve tray at partial reflux

作　　者：赵培[1] 杨康[1] 张秋香[1] 

机构地区：[1]华东理工大学化工学院,上海200237

出　　处：《现代化工》2015年第9期168-171,共4页Modern Chemical Industry

摘　　要：以环己烷-正庚烷物系，在直径为0．75m、内置4块塔板、40m2板式再沸器和30m2板式冷凝器的精馏塔中考察了开孔率、阀孔动能因子、回流比等因素对十字旋阀塔板默弗里板效率的影响。其中开孔率变量是8．22％、11．0％和13．56％；阀孔动能因子变化范围是（5～13）（rn／8）（kg／m2）0.5；回流比变量是∞、15、10、8。在开孔率为11．0％，回流比为15的条件下，与F1型浮阀的板效率做了对比。将实验值与AIChE效率模型、变型的Chen—Chuang效率模型的计算值也进行了对比。结果表明，在相同操作条件下，开孔率越大，塔板效率越低，且波动也越大；在相同开孔率条件下，塔板效率随回流减小而变小；基于Liang等的变型Chen—Chuang模型更加适合十字旋阀塔板的板效率预测，其误差较小，为工业设计提供了参考。The mass transfer performance of the cross-type valve trays was studied in a plate distillation column with diameter 750 mm and height 4000 mm, using cyclohexane and n-heptane as experimental material. At atmospheric pressure and partial reflux conditions, the influence of the kinetic energy factor, reflux ratio and open porosity of valve hole on tray efficiency were tested. The experimental value was compared with AIChE model and Chen-Chuang model. According to dimensional analysis, efficiency model for the cross-type valve tray under the condition of partial reflux were established. The results indicate that, at the same operational conditions, the bigger open porosity, the greater tray efficiency oscillation and the lower efficiency. At the same open porosity, the bigger reflux radio, the more efficiency of the tray. Based on Liang et al, the Chen-Chuang model is better than the others. Therefore, it can provide important information for the cross-type valve trays for applying to industry.

关 键 词：十字旋阀 板效率 开孔率 阀孔动能因子 回流比 

分 类 号：TQ053.5[化学工程]