CAJ | 학술논문

采用严格模拟法对多组分蒸馏过程进行了研究.给出了产生逆向蒸馏的3个主要原因,即进料位置不当、进料中关键组分摩尔分数过低以及实际回流比(摩尔比)接近最小回流比.分析了逆向蒸馏的弊端,如进料位置不当所引起的逆向蒸馏,使冷凝器和再沸器能耗分别增加12.76%和12.19%,总计能耗增加达24.95%.提出了避免逆向蒸馏的方法.蒸馏塔设计需分析有无逆向蒸馏现象,逆向蒸馏应予以消除,同时还需进行参数优化,包括塔板数、进料位置、回流比等.而简化法计算结果过于粗糙,只能作为参考而不能作为最终设计的依据.
채용엄격모의법대다조분증류과정진행료연구.급출료산생역향증류적3개주요원인,즉진료위치불당、진료중관건조분마이분수과저이급실제회류비(마이비)접근최소회류비.분석료역향증류적폐단,여진료위치불당소인기적역향증류,사냉응기화재비기능모분별증가12.76%화12.19%,총계능모증가체24.95%.제출료피면역향증류적방법.증류탑설계수분석유무역향증류현상,역향증류응여이소제,동시환수진행삼수우화,포괄탑판수、진료위치、회류비등.이간화법계산결과과우조조,지능작위삼고이불능작위최종설계적의거.
Rigorous algorithm was used to study the multi-component distillation process . Three key reasons causing retrograde distillation were given : the wrong feed plate, much lower mole fraction of key components in the feed, and the operation reflux ratio ( mole ratio) approaching the minimum reflux ratio. The deficiency caused by retrograde distillation was analyzed, for example, the retrograde distillation caused by the wrong feed plate would lead to extra energy consumption; the heat duties for the condenser and the reboiler increased by 12.76% and 12. 19% respectively. Hence, the total energy consumption increased by 24. 95%. The measures to avoid the retrograde distillation were also proposed. The distillation column design should be analyzed to conform whether there was retrograde distillation, and the retrograde distillation should be avoided. The parameters of column design should be optimized, including stage number, feed location and reflux ratio, et al. The results based on the column short-cut methods are too coarse to be used as the final design version.