Frontiers of Chemical Science and Engineering
>> 2009,
Volume 3,
Issue 4
doi:
10.1007/s11705-009-0266-6
Research articles
The energy consumption in a batch stripper and
a batch rectifier
State Key Laboratory
of Chemical Engineering, School of Chemical Engineering and Technology,
Tianjin University, Tianjin 300072, China;
Available online: 2009-12-05
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Abstract
The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model. The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under “general constant reflux” and “general constant distillate composition” with the ratio of minimum energy consumption /. When the feed contains a large amount of light component, the product purity specification is low and the relative volatility is small, the minimum energy consumption of a batch stripper is less than that of a batch rectifier under “general constant reflux” and “general constant distillate composition”. When the feed contains a small amount of light component, the product purity specification is very high and the relative volatility is low, a batch stripper can also consume less energy only in the “general constant distillate composition” operation mode. In other cases, a batch rectifier can consume less energy.
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