页岩气液化工艺操作成本估算

摘要

Liquefying shale gas into LNG product near the gas well can be of more economic flexibility in response to the problems existing in the development of shale gas in China. The cost estimation of liquefaction for the shale gas from Wei 204# well in Weiyuan was taken as the calcula‐tion case. Based on the propane‐precooled mixed refrigerant liquefaction process ,chemical simulation software Hysys was employed as the simula‐tor. Software Design‐Expert and Matlab were also used to optimize the composition proportion of the mixed refrigerant with the minimum energy consumption of the mixed‐refrigerant cycle as the objective function. Then the formula for cost estimation was concluded according to the composi‐tion proportion above. The merit of simplicity makes the formula convenient and practical for cost analysis of the shale gas liquefaction in field oper‐ation.%针对我国页岩气开采中存在的问题，提出对页岩气就近进行L N G液化更具经济灵活性，并以四川威远的威204井开采出的页岩气的液化为例进行液化工艺操作成本估算。使用化工流程模拟 HYSYS软件对流程进行工艺模拟，并利用M atlab软件以混合制冷循环部分的操作能耗最低为目标对混合制冷剂的配比进行了多参数优化，得到较优的混合制冷剂配比。在该优化配比下，对操作成本进行分析，总结出适用于操作成本估算的公式，为国内发展页岩气产业提供参考。