炼厂氢气网络的夹点分析及优化

Pinch-point analysis of refinery hydrogen networks and optimization

中国石油大连西太平洋石油化工有限公司是全加氢型炼油厂,原油加工能力10 Mt/a,其中含硫油加工比例约90%,其产品全部需要加氢精制。因此,通过技术分析和适当改造,对氢气系统进行优化和合理利用,对节能降耗具有重要意义。应用夹点技术对WEPEC氢气网络进行了分析,得出理论最大可回收利用的氢气量为19.22dam3/h。通过优化加氢装置氢源、优化制氢装置配氢的组成及用量、增加氢气提纯设施等,实际回收利用氢气17dam3/h,占原新氢用量的14.4%,取得了较为明显的经济效益。

The refinery of West Pacific Petrochemical Co. , Ltd is a hydrogenation refinery with a capacity of 10 million tons per year. As 90% of crude oil processed is sulfur crude, all products of the refinery need to be hydrotreated. Therefore, technical analysis and revamping are very significant for optimization and proper utilization of refinery hydrogen system as well as for reduction of energy consumption. The pinch-point analysis of refinery hydrogen networks of WEPEC concludes that the theoretically maximum recoverable hydrogen is 19.22 dam3/h. Through optimization of hydrogen sources of hydrotreating units, optimization of composition and flow of hydrogen from hydrogen plants and addition of hydrogen purification facilities, etc the hydrogen actually recovered is 17 dam3/h, which is 14.4% of make-up hydrogen requirements before optimization. The economic benefit is significant.