天然气与石油2026，Vol.44Issue(4)：35-40,6.DOI:10.3969/j.issn.1006-5539.2026.04.005
对二甲苯低温结晶与液化天然气冷能的耦合工艺研究
Study on coupling process of p-xylene cryogenic crystallization and LNG cold energy
仇德朋 1王江涛 1陈景生1
作者信息
- 1. 中海油石化工程有限公司,山东 济南 250101
- 折叠
摘要
Abstract
Cold energy in p-xylene(PX)cryogenic crystallization is typically provided by electric-driven compression refrigeration,which involves high energy consumption,complex process flow,and operational control challenges.Introducing the cold energy contained in liquefied natural gas(LNG)to replace compression refrigeration can significantly reduce the electricity consumption of crystallization.This paper analyzes in detail the compression refrigeration process commonly used for cryogenic crystallization.Based on the feasibility of coupling the refining and LNG industries,various cold energy utilization schemes are investigated,including full and partial substitution of compression refrigeration.The influence of different LNG pressures on cold energy supply is also examined.Calculations show that for different schemes,the required LNG flow rate ranges from 30 to 513 t/h,corresponding to electric motor power savings of 2 400 to 30 000 kW,which can significantly reduce the electricity cost of PX production.Combined with practical experience,the engineering feasibility of the schemes is analyzed in detail,including LNG supply and storage methods,providing reference for the implementation of similar projects.关键词
对二甲苯/低温结晶/LNG/冷能/耦合Key words
PX/Cryogenic crystallization/LNG/Cold energy/Coupling引用本文复制引用
仇德朋,王江涛,陈景生..对二甲苯低温结晶与液化天然气冷能的耦合工艺研究[J].天然气与石油,2026,44(4):35-40,6.
