论文部分内容阅读
本文开发了一种乙醇脱水制乙烯工艺。为降低装置能耗,提高乙烯回收率,乙烯精制单元采用由脱重塔和脱轻塔组成的双塔分离工艺,以避免使用高能耗的深冷分离设备。本文运用PRO/II流程模拟软件建立了乙醇脱水制乙烯全流程工艺模型,通过研究乙烯精馏单元精馏塔的理论塔板数、进料位置、回流比等参数对乙烯分离效果的影响,确定了较优的工艺操作条件;通过全流程模拟计算,得到全装置总体物料平衡,乙烯产品纯度达到99.98 wt%,乙烯回收率达到99.5%,乙烯精馏部分单位产品能耗为1.03MJ/t。
This paper developed a process of dehydration of ethanol to ethylene. In order to reduce the energy consumption of the plant and increase the ethylene recovery rate, the ethylene refining unit adopts a two-column separation process consisting of a stripping tower and a stripping tower to avoid the use of a high energy consumption cryogenic separation equipment. In this paper, PRO / II process simulation software was used to establish the whole process model of ethylene dehydration from ethylene to ethylene. The effects of theoretical plate number, feed position, reflux ratio and other parameters on ethylene separation were studied. The overall material balance of the whole plant was obtained. The purity of ethylene products reached 99.98 wt%, the ethylene recovery rate reached 99.5%, and the energy consumption per unit of product of ethylene rectification was 1.03 MJ / t.