文档介绍：网络首发时间：2022-06-21 17:08:22
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ccounting for % of the total
exergy loss. Through the advanced exergy analysis, it is found that the avoidable endogenous exergy loss of most equipment accounts
for a high proportion, indicating that process improvements should focus on device performance rather than process structure.
Improving the structure of cold box LNG-100, the efficiency of compressor, the internal structure of air cooler AC-302 and the
working conditions of other equipment can effectively reduce the exergy loss. The inevitable endogenous exergy loss of the tower
equipment is large, the transformation of these equipment is limited, and the rectification reaction will occur in the tower, which
makes it difficult to improve the effective energy utilization.
Keywords: double-tower helium extraction; helium recovery rate; traditio nal exergy analysis; advanced exergy analysis; exery loss
氦气是一种稀有的战略性资源。天然气提氦 数油田采用深冷-膜分离工艺从天然气中提氦，存在
技术主要包括变压吸附法（PSA）、膜分离法和深冷 氦气回收率低、综合能耗大等问题[2-8]。
法等；集成的天然气提氦技术包括深冷-膜分离联 本文将低温精馏与提氦工艺相结合，提出一种
合法、深冷-膜分离耦合法、LNG联产法、NRU联合