丁烷异构化工艺的能量利用及其优化设计

ENERGY UTILIZATION OF BUTANE ISOMERI-ZATION PROCESS AND THE OPTIMIZATION

简要介绍了丁烷异构化工艺的发展现状及典型的异构化工艺流程,利用Aspen Plus软件模拟,进行了能量的集成利用及重点换热器的设计优化,分析比较了能耗和成本的节省情况。在产品分离部分,对稳定塔和异丁烷塔进行热耦合,节省了低压蒸汽消耗,通过适当升高稳定塔压力实现了更佳的节能效果。在异构化反应部分,优化反应进出料换热,采用缠绕管式换热器提高低温进出料换热器热负荷,节省了高压蒸汽消耗,与普通管壳式换热器相比有较明显的优势。

This article briefly introduces the development of butane isomerization process and the typical process flow of isomerization.The integrated utilization of energy and the design optimization of key heat exchangers was carried out by simulation with Aspen Plus.The energy and cost savings were analyzed and compared.In product separation section,the stabilizer and isobutane column were thermally coupled to save the consumption of low pressure steam,and better energy-saving effect was achieved by appropriately increasing the stabilizer pressure.In isomerization section,the heat transfer of reaction feed and effluent was optimized.The heat duty of low-temperature feed-effluent heat exchanger was increased by using a spiral wounded heat exchanger,which saved the consumption of high pressure steam and had obvious advantages compared with ordinary shell and tube heat exchangers.