The Operation of Draining Column Holdup for Slop Cut Withdrawal in Batch Distillation

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The Operation of Draining Column Holdup for Slop Cut Withdrawal in Batch Distillation

ZHANGXuemei^a; HEJie^a;ZHANGWeijiang^a;ZHANGZhigang^a,JIANChungui^b; YANGZhicai^a

a School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
b Tianjin Univtech Co. Ltd., Tianjin 300072, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-06-28 Published:2006-06-28
Contact: ZHANG Xuemei

分批精馏过渡段放持液操作方式

张雪梅^a; 何杰^a; 张卫江^a; 张志刚^a; 简春贵^b; 杨志才^a

^a School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
^b Tianjin Univtech Co. Ltd., Tianjin 300072, China

通讯作者: 张雪梅

Abstract

Abstract: The new mode of operation for slop cut withdrawal in batch distillation, i.e., draining column liquid holdup at the end of slop cut period, was proposed. And the stopping criterion for the operation was investigated. Experiments were carried out with isopropanol-n-propanol binary system and isopropanol-n-propanol-n-butanol ternary system in a distillation column with a liquid collector installed between the reboiler and the column section. Experimental results in a 45mm batch column show that the proposed policy can overcome the flywheel effect caused by column liquid holdup and thus cut down operation time and energy consumption 31%—61%.

Key words: batch distillation, slop cut, mode of operation, column holdup

摘要： The new mode of operation for slop cut withdrawal in batch distillation, i.e., draining column liquid holdup at the end of slop cut period, was proposed. And the stopping criterion for the operation was investigated. Experiments were carried out with isopropanol-n-propanol binary system and isopropanol-n-propanol-n-butanol ternary system in a distillation column with a liquid collector installed between the reboiler and the column section. Experimental results in a 45mm batch column show that the proposed policy can overcome the flywheel effect caused by column liquid holdup and thus cut down operation time and energy consumption 31%—61%.

关键词: batch distillation;slop cut;mode of operation;column holdup

ZHANGXuemei, HEJie,ZHANGWeijiang,ZHANGZhigang,JIANChungui, YANGZhicai. The Operation of Draining Column Holdup for Slop Cut Withdrawal in Batch Distillation[J]. .

张雪梅, 何杰, 张卫江, 张志刚, 简春贵, 杨志才. 分批精馏过渡段放持液操作方式[J]. CIESC Journal.

References

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