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化工进展  2015 

天然气轻烃回收工艺设计及操作参数的优化

DOI: 10.16085/j.issn.1000-6613.2015.10.011, PP. 3589-3594

Keywords: 分离,化学过程,C2回收率,CO2冻堵,模拟,操作参数的优化

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Abstract:

以廉价天然气中的乙烷和丙烷为原料的乙烯成本仅是石脑油等重质原料成本的30%,高压管输天然气进入城市门站分输需调压,调压过程中有大量压力能可利用。本文以某段高压管输天然气为原料,提出了处理量60×104m3/h的轻烃分离回收工艺流程,综合考虑轻烃回收率、系统功耗、CO2冻堵、冷箱传热温差等因素,优化操作参数,完成了系统能量的高效集成,实现了轻烃分离工艺的节能降耗。该方案C2回收率达90%以上,可为乙烯装置提供优质的乙烷等轻烃原料50.75万吨/年,有利于解决乙烯工业发展的原料瓶颈,提高天然气、乙烯工业的整体经济效益。

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