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Development of Complex Batch Distilllation System for Energy Conservation

节能复合间歇蒸馏系统的开发

基本信息

批准号：
05555209
负责人：
HASHIMOTO Iori
金额：
$ 4.48万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1995
项目状态：
已结题

项目摘要

A new type of separation system called "complex batch distilllation column" is proposed, and the characteristics of this column are examined.From the view point of energy consumption, batch distilllation has been considered to be an ineffective separation method compared with continuous distilllation. However, the complex column proposed here can be regarded as a multiple-heat-integrated system in which a condenser of one column is heat-integrated with the reboiler of the next column. Therefore, the energy required for separating multiple components is markedly less than that of an ordinary batch distilllation system.The complex column is convenient for removing light and heavy impurities from the raw materials since the impurities could be withdrawn simultaneously from the top and the bottom. By analyzing the differences between ordinary and stripping batch distilllation columns, the conditions at which the complex column works effectively compared with ordinary batch distilllation co … More lumn are clarified.The optimal structure of the batch distilllation column is discussed from the viewpoint of energy conservation. In this research, in addition to ordinary and stripping batch distilllation columns, many types of complex columns are taken into account. At first, by analyzing the differences among ordinary, stripping, and total reflux batch distilllation columns separating binary components, two heuristic rules with regard to the separation performance of those columns are derived. It becomes clear that, by using these heuristic rules, the candidates of the optimal structure can be limited to a few structures.The energy consumption of the complex column is compared with that of an ordinary continuous distilllation system for various separation conditions. Through exhaustive simulation work, it is found that in many cases the energy consumption of the complex column is the same or smaller than that of optimal continuous distilllation systems when the total number of trays is the same for both systems. Less

提出了一种新型的分离系统--“复合间歇精馏塔”，并对该塔的特点进行了考察，从能耗的角度出发，认为间歇精馏与连续精馏相比是一种低效的分离方法。然而，本文提出的复合塔可以看作是一个多热集成系统，其中一个塔的冷凝器与下一个塔的再沸器热集成。因此，分离多组分所需的能量明显低于普通间歇精馏系统，复合塔可以从顶部和底部同时提取杂质，便于从原料中脱除轻杂质和重杂质。通过分析普通精馏塔与汽提间歇精馏塔的不同，得出了复合塔与普通间歇精馏塔相比有效工作的条件，并与常规间歇精馏塔进行了比较，得出了精馏精馏塔与精馏间歇精馏塔进行…比较的结论从节能的角度对间歇精馏塔的优化结构进行了探讨。在本研究中，除普通精馏塔和汽提间歇精馏塔外，还考虑了多种类型的复杂精馏塔。首先，通过分析分离二元组分的普通间歇精馏塔、汽提间歇精馏塔和全回流间歇精馏塔的差异，得出了两条关于这些塔的分离性能的启发式规则。显然，利用这些启发式规则，可以将最优结构的候选结构限制在几个结构中，并在不同的分离条件下将复合塔和普通连续蒸馏系统的能耗进行了比较。通过详尽的模拟工作发现，在塔板总数相同的情况下，复杂塔的能耗在许多情况下与最优连续蒸馏系统相同或更小。较少