DHX工艺在膨胀制冷轻烃回收装置上的应用

Application of DHX process in expansion refrigeration light hydrocarbon recovery unit

关键词:  轻烃回收  膨胀机  DHX工艺  C₃收率

Key words:  light hydrocarbon recovery  expander  DHX process  C₃ yield

摘要:

江油轻烃厂45×10⁴ m³/d轻烃回收装置是以回收中坝气田须二气藏不含硫天然气中的C₃H₈、C₄H₁₀、C₅H₁₂及C⁺₆以上轻烃组分为目的的生产装置。2017年以前,江油轻烃厂生产工艺为单级膨胀制冷(ISS)工艺,2017年对装置进行了工艺技术改造,在其原有基础上将工艺流程改为DHX工艺。经技术改造后,江油轻烃厂C₃收率由原来的61.87%提高到83.46%,每天增加液化石油气约3 t,年创效益约400万元。

Abstract:

The 450×10³ m³/d light hydrocarbon recovery unit of Jiangyou Light Hydrocarbon Plant is designed to recover C₃H₈, C₄H₁₀, C₅H₁₂ and C⁺₆ light hydrocarbon components in the sulfur-free natural gas of the Zhongba gas field. The production technology was a single-stage expansion refrigeration (ISS) process before the year of 2017. Light hydrocarbon recovery unit was retrofitted and changed to be direct heat exchange(DHX) process based on the original installation in 2017. After technological innovation,the C₃ yield of the light hydrocarbon recovery unit has increased from 61.87% to 83.46%, which is about 3 tons of liquefied petroleum gas per day,and the annual benefit is about 4 Million yuan.