石油与天然气化工2026，Vol.55Issue(1)：28-32,5.DOI:10.3969/j.issn.1007-3426.2026.01.004
分子炼油工艺流程优化实践与探索
Practice and exploration of process flow optimization of molecular refining
涂连涛 1漆小川 1郭旭 2关创 1袁宏国1
作者信息
- 1. 中国石油独山子石化分公司
- 2. 中国石油炼油化工和新材料分公司
- 折叠
摘要
Abstract
Objective The aim is to solve the issues of insufficient production capacity of low pour point diesel in the refinery,high C3+content in coking dry gas,and an increase in operation costs after adding a circulating hydrogen desulfurization unit.Method Based on the concept of molecular refining,the unit models for diesel blending,absorption and stabilization,and circulating hydrogen desulfurization were established using simulation software to provide references for optimizing the process scheme.Result The first cut of atmospheric gas oil and the second cut of atmospheric gas oil were mixed at a mass ratio of 1∶2.The pour point of the blended diesel was −35℃and the cetane index was 52.6,which could meet the requirements for blending low pour point diesel.The volume fraction of C3+components in the coking dry gas was reduced from 10.0%to 3.5%,the compressor load of cracking gas was reduced by 18.7 kmol/h,and 4 776 t/a more naphtha could be processed.The rich amine solution from the sulfur recovery unit was used as the lean amine solution for the circulating hydrogen desulfurization of the hydrocracking unit.After the desulfurization unit was put into operation,the volume fraction of hydrogen sulfide(H2S)in the circulating hydrogen reached 0.11%-0.22%,and the stripping steam consumption of the unit decreased by 1.37 t/h,while the consumption of lean amine solution decreased by 27 t/h.Conclusion The optimization of the molecular refining process flow can effectively enhance the economic benefits of the facility.关键词
分子炼油/流程模拟/低凝柴油/焦化/加氢裂化Key words
molecular refining/process simulation/low pour point diesel/coking/hydrocracking引用本文复制引用
涂连涛,漆小川,郭旭,关创,袁宏国..分子炼油工艺流程优化实践与探索[J].石油与天然气化工,2026,55(1):28-32,5.
