文档介绍：第三届中国 LNG 论坛论文编号:1230702
小型撬装式天然气液化流程模拟与分析
贺天彪巨永林
(上海交通大学制冷与低温工程研究所上海 200240)
摘要:基于中国绝大多数天然气田储量不大,而且分布较分散,离天然气管道较远,因此小型撬装式天然气装置在
中国具有广阔的应用前景。小型撬装式天然气装置要求设备少、结构紧凑、操作简单、可靠性高、适应性强、操作
弹性大。这对于净化与液化流程提出了更高的要求。本文采用化工流程软件 HYSYS,单阶混合制冷剂流程,氮气膨
胀流程和带丙烷预冷氮气膨胀流程三种工艺流程进行了模拟分析,并以单位能耗为指标对上述三种流程进行了优化。
优化结果发现带丙烷预冷氮气膨胀流程换热平均温差较小,而且能耗较低,流程简单,启动快操作与维护方便,是
比较适合于小型撬装式液化天然气装置的流程。
关键字:液化天然气(LNG);小型;撬装式;流程模拟
Simulation and analysis of liquefaction process for small-scale
liquefied natural gas plants in skid-mounted packages
,
(Shanghai Jiao Tong University, Institute of Refrigeration and Cryogenics, Shanghai 200240, China)
Abstract: Based on the fact that the majority of the natural gas fields in China have small reserves,
dispersed distribution and are far away from the natural gas pipelines, small-scale LNG (Liquefied Natural
Gas) plants in skid-mounted packages have a broad application prospect in China. Small-scale LNG
(Liquefied Natural Gas) plants in skid-mounted packages have many advantages, including less equipments,
compact structure, high reliability and adaptability, simple and flexible operation. Therefore, it sets higher
requirements for the purification and liquefaction process. In this paper, three liquefaction processes,
including mixed refrigerant process, nitrogen expansion process and nitrogen expansion process with
propane pre-cooling, are d