氨蒸馏工艺中蒸氨塔的模拟计算

以AspenPlus软件为平台，对氨蒸馏工艺的蒸氨塔进行了模拟计算。通过对塔板数、进料位置、回流比与进料热状态的模拟，研究了各参数的影响特点。认为塔板数宜取大一些，进料位置靠近塔下端有利，回流比的选择应首先考虑满足产品质量，进料温度接近泡点为佳。确定塔板数8，在第6块塔板处进料，进料温度100℃，回流比1，灵敏板为第7块塔板，得到塔顶液氨产品氨摩尔浓度〉99．5％，塔底残留液氨摩尔浓度〈5％，满足设计规定。

The Simulation for Ammonia Rectification Columnin Ammonia Rectifying Process

This paper simulated the ammonia rectification column in ammonia rectifying process by Aspen Plus software as the platform.Through the simulation for stage numbers,feeding stage,reflux ratio and feed heat state,did a research for the influence feature of every parameter.Concluded that a little more stage numbers is better,feeding stage took advantage while approaching the bottom,reflux ratio was fixed on by product quality firstly,feed temperature near bubble point had better.Set stage number 8,feeding stage number 6,feed temperature 100 ℃,reflux retio 1,sensitive stage 7,got the result of ammonia mole fraction in liquid ammonia from the column top >99.5%,and that of residual liquid from the column bottom<5%,which exactly conformed to design specification.