摘要
变压精馏工艺虽然是生产高浓度甲缩醛的主要方法,但该工艺存在能耗高的缺点。本文基于变压精馏分离甲缩醛和甲醇共沸物的工艺方法,利用Aspen plus软件对10万t/a高浓度甲缩醛生产过程进行模拟,基于模拟数据和Aspen Energy analyzer软件对该过程换热网络进行分析和优化。结果表明:在最小传热温差为10℃时,常规变压精馏工艺夹点温度为84.03℃(热物流)和74.03℃(冷物流),充分利用甲缩醛加压精馏塔塔顶物流潜热及塔底物流显热的换热网络节能效果显著,优化后的换热网络可节省热公用工程3.732 MW、冷公用工程3.701 MW,热节能率为33.68%。
Although the pressure swing distillation process is the main method for producing high concentration methylal,it has the disadvantage of high energy consumption.Based on the process of separating methylal and methanol azeotrope by pressure swing distillation,a 100,000 t/a high concentration methylal production process is simulated by Aspen plus in this paper.The heat exchange network of the process is analyzed and optimized by combining the simulation data and Aspen Energy analyzer software.The results show that when the minimum heat transfer temperature difference is 10℃,the pinch point temperatures of the cold and hot streams in the conventional pressure swing distillation process are 74.03℃and 84.03℃respectively.The heat exchange network that makes full use of the latent heat of the top stream and the sensible heat of the bottom stream of the methylal pressurized distillation tower has a significant energy-saving effect.The optimized heat exchange network can save 3.732 MW of heating utility and 3.701 MW of cooling utility,with an energy-saving rate of 33.68%.
作者
张效龙
王志亮
冷桂玲
Zhang Xiaolong;WangZhiliang;Leng Guiling(Qingdao Maite da New Materials Co.,Ltd.,Qingdao 266590,China;College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《山东化工》
CAS
2023年第16期15-20,共6页
Shandong Chemical Industry
关键词
甲缩醛
变压精馏
换热网络
ASPEN
夹点
methylal
pressure swing distillation
heat exchange network
aspen
pinch
