【摘要】 针对氯丙烯生产过程中的高能耗问题，提出使用隔壁精馏塔代替常规双塔脱轻脱重分离的新工艺。以某厂3万t/a氯丙烯生产装置为对象，使用Aspen Plus软件对原工艺和改进工艺进行模拟优化，考察塔板数、隔板长度、隔板位置、汽相分配比、液相分配比、进料位置及侧线采出位置对热负荷和经济效益的影响。结果表明：理论板数为52块，垂直隔板位于塔内14块板到43块板之间，质量回流比为59,汽相分配比与液相分配比(质量流量比)分别为1.20和0.32,进料位置为22块理论板，侧线采出位置为33块理论板时，隔壁塔的节能效果最佳，对比传统双塔工艺塔顶冷凝器可节能47.9%、塔底再沸器可节能45.2%、年度总费用降低37.9%。更多还原

【Abstract】 A new process using DWC(dividing wall column) instead of conventional double towers for light and heavy componets separation to address the high energy consumption in the production of 3-chloropropene. Aspen Plus software was used to simulate and optimize the traditional and improved processes of a 30 000 t/a propylene chloride plant. The effects of the number of trays, baffle length, baffle position, vapor phase distribution ratio, liquid phase distribution ratio, feed position and side line extraction position on thermal load and economic benefits were investigated. The results indicate that when the total theoretical number of plates is 52, with vertical partitions is located between 14 and 43 plates, the mass reflux ratio is 59, and the vapor phase distribution ratio and liquid phase distribution ratio(mass flow ratio)are 1.20 and 0.32, respectively. The feeding position is 22 theoretical plates, the side line extraction position is 33 theoretical plates, and the energy-saving effect of the dividing wall column achieves the best. Compared to traditional process, the condenser of the tower can save 47.9% energy, the reboiler can save 45.2% energy, and the total annual cost can be reduced by 37.9%.更多还原