石油与天然气化工2025，Vol.54Issue(1)：55-62,8.DOI:10.3969/j.issn.1007-3426.2025.01.008
乙烷回收装置热集成工艺改进
Improvement of heat integration process for ethane recovery unit
摘要
Abstract
Objective The ethane recovery and treatment unit in Jiaxian County has issues such as suboptimal heat integration solutions,complex refrigeration system,and suboptimal process parameters,resulting in high energy consumption of the system.This study aims to reduce the energy consumption of the ethane recovery and treatment units.Method Taking the ethane recovery unit in Jiaxian County as an example,an analysis was conducted on its heat integration situation based on the theory and methodology of system heat integration-pinch technology.Based on the findings of this analysis,an improved process with high heat integration degree—RSVHT,was proposed.Result Firstly,the improved process achieved efficient heat integration of hot streams such as raw material gas and external reflux gas with cold streams such as demethanizer streams and dual-temperature propane refrigerants in multiple heat exchangers.While maintaining an ethane recovery rate of 95%,the propane consumption was reduced by 50.8%,and the total compression work of the system was reduced by 3 641 kW,achieving a high energy-saving rate of 19.9%.Secondly,the improved process eliminates the reboiler for separate heating of the demethanizer and the screw-type propane refrigeration system by adopting a single set of propane refrigeration system to provide dual-temperature cold sources of-8.7℃and-38.3℃,simplifying the refrigeration process.Thirdly,by optimizing the temperature of the low-temperature separator and other process parameters in the process,the amount of propane refrigerant was further reduced.Conclusion The research results provide an effective scheme for improving of the heat integration process of the ethane recovery unit in Jiaxian County,and also provide technical references for the design and optimized operation of domestic ethane recovery units.关键词
乙烷回收/工艺改进/热集成/夹点技术/参数优化Key words
ethane recovery/process improvement/heat integration/pinch teehnology/parameter optimization引用本文复制引用
刘百川,刘清松,蒋洪..乙烷回收装置热集成工艺改进[J].石油与天然气化工,2025,54(1):55-62,8.基金项目
中国石油工程建设有限公司西南分公司科研项目"天然气乙烷回收的理论分析和工艺改进研究"(JCF-2023-200-6) （JCF-2023-200-6）
