深冷法提氦联产LNG工艺分析优化  

Exergy analysis and optimization of helium extraction and LNG production by cryogenic process

作　　者：蒋洪[1] 陈泳村 程祥 杨铜林 祝梦雪 JIANG Hong;CHEN Yongcun;CHENG Xiang;YANG Tonglin;ZHU Mengxue(School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu 610500,Sichuan Province,China;Oil Gas Technology Research Institute,PetroChina Tarim Oilfield Company Natural Gas Division,Tarim 841000,Xinjiang,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]塔里木油田分公司油气工程研究院,新疆塔里木841000

出　　处：《化学工程》2023年第8期78-83,88,共7页Chemical Engineering(China)

摘　　要：为提高天然气提氦的经济性,基于深冷法提氦流程,提出一种天然气氦气回收及天然气液化联产工艺。由于提氦流程换热结构的复杂性,利用传统㶲分析对工艺设备的㶲损和㶲效率进行定量分析,通过高级㶲分析对设备的真实改进潜力进行评价。传统㶲分析结果显示:工艺主要设备㶲效率普遍较高;氦提浓冷箱E-101是工艺中㶲损最大的设备,占总㶲损量的35.56%。高级㶲分析结果显示:工艺系统中主要设备的㶲损失大部分为内源性㶲损,表明改进的重点应放在每个独立设备的优化上,比如通过改变混合冷剂增压装置C-101效率等方式来减少㶲损。研究为天然气氦回收工程优化设计及应用提供了技术参考。A helium recovery process and a natural gas liquefaction cogeneration process were proposed based on the cryogenic helium extraction process to increase economy.To solve the complexity of heat transfer structure in helium extraction process,the traditional exergy analysis was adopted,and the quantitative analysis was carried out on the exergy loss and the exergy efficiency of process equipment.Using advanced exergy analysis,the real improvement potential of the equipment was evaluated.The results of traditional exergy analysis show that the helium concentration cold box E-101 has the largest loss in the process,accounting for 35.56%.The results of advanced exergy analysis show that the endogenous exergy loss plays the main role on the total exergy loss of equipment,and the optimization of independent equipment can significantly reduce the exergy loss of the process,such as change the efficiency of mixed refrigerant booster C101.This study provides guidance for optimization of natural gas helium recovery project.

关 键 词：深冷法 氦气回收 㶲损 传统㶲分析 高级㶲分析 

分 类 号：TE646[石油与天然气工程—油气加工工程]