Modeling and Simulation of Skid-mounted LNG Plants Using HYSYS Software

This study presents three kinds of skid-mounted plants, including single mixed refrigerant cycle （MRC）, nitrogen expander cycle, and natural gas （NG） Claude cycle. Hysys simulation shows that single MRC is the most efficient cycle among the three. The specific power of single MRC liquefiers is 1 485 k.l/kg, 15% higher than that of large liquefaction process. Considering the recovery of stranded-gas, commercial analysis suggests that the initial cost of LNG plants ranging from 1 to 100 ms/day can be paid back in 2 to 4 years.

天然气净化液化装置的设计与分析

天然气净化液化装置采用二甘醇胺脱酸、分子筛脱水天然气净化技术和氮气二级膨胀制冷工艺。氮气二级膨胀制冷工艺的制冷剂总是处于气相,换热器在相当宽的温差范围内操作,能承受进料气的组成变化。采用燃气发电机作为工厂电源并利用燃气发电机的尾气作为DGA复活和分子筛再生气的热源。本装置的成功投运为我国在边远油气田利用天然气生产LNG提供了经验。