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针对LNG接收站BOG再冷凝工艺预冷法优化方案的改进 预览

Improvement of pre-cooling optimization scheme for BOG recondensation process in LNG terminals
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摘要 国内外学者提出过许多关于液化天然气(liquefied natural gas,LNG)接收站蒸发气(boil-off gas,BOG)再冷凝工艺的优化方案。其中,采用预冷法对再冷凝工艺进行优化的方案由于前期投入较少且优化效果明显,更具有现实意义。然而,现有的预冷法优化方案还存在着优化原则不清晰和考虑工况不全面等问题。本文介绍了LNG接收站现有BOG再冷凝工艺流程与经预冷法优化后的再冷凝工艺流程,分析得到了预冷法优化的理论原理。针对接收站两种典型工况提出了相应的优化原则。以江苏如东LNG接收站现有再冷凝工艺流程为计算实例,运用HYSYS软件对优化前后的再冷凝工艺进行模型建立与流程模拟,应用所建模型对优化前后的再冷凝工艺总功耗进行对比分析。结果表明:经改进后的再冷凝工艺预冷法优化方案可以有效地根据相应的优化原则对两种典型工况进行优化。通过将研究成果应用于江苏如东LNG接收站可知,在两种典型工况下,优化后的BOG再冷凝工艺较原工艺分别节约系统总功耗9.8%和21.5%。 Domestic and foreign scholars have proposed many optimization schemes for the recondensation process of boil-off gas(BOG) in liquefied natural gas(LNG) terminals. The pre-cooling optimization scheme has more practical significance because of less initial investment and obvious optimization effect. However, the existing pre-cooling optimization scheme has problems such as unclear optimization principles and incomplete consideration of working conditions. Therefore, this paper introduced the existing re-condensation process in LNG terminals and the process optimized by precooling method. The theoretical principle of the pre-cooling optimization method was obtained and corresponding optimization principles for two typical operating conditions in LNG terminals were proposed. The existing recondensation process of Rudong LNG terminal in Jiangsu province was used as an example. The models were established and the recondensation process was simulated before and after optimization using HYSYS. A comparative analysis of the total power-consumption of the recondensation process before and after optimization was carried out using the built-in model built in HYSYS. The result showed that the improved pre-cooling optimization scheme can effectively optimize the two typical working conditions according to the corresponding optimization principle. The application of the research results at the Rudong LNG terminal in Jiangsu indicated that the improved pre-cooling optimization scheme resulted in 9.8% and 21.5% energy reduction, respectively, under the two typical operating conditions.
作者 吴明 朱祚良 孙东旭 何俊男 唐凯 胡本源 田士章 WU Ming;ZHU Zuoliang;SUN Dongxu;HE Junnan;TANG Kai;HU Benyuan;TIAN Shizhang(College of Petroleum Engineering,Liaoning Shihua University,Fushun 113001,Liaoning,China;College of Pipeline and Civil Engineering, China University of Petroleum (East China),Qingdao 266580,Shandong,China;PetroChina Jiangsu Liquefied Natural Gas Company Limited, Nantong 226000,Jiangsu,China)
出处 《化工进展》 EI CAS CSCD 北大核心 2019年第5期2521-2526,共6页 Chemical Industry and Engineering Progress
基金 中国石油天然气股份有限公司重大科技专项“江苏液化天然气接收站优化运行研究”(KLNY-JSLNG-JS-20170527-058)。
关键词 LNG接收站 天然气 再冷凝工艺 预冷法 优化 模拟 LNG terminal natural gas recondensation pre-cooling optimization simulation
作者简介 第一作者:吴明(1961-),男,博士,教授,博士生导师,研究方向为油气储运工程及油气保供对策。E-mail:wuming0413@163.com;通信作者:孙东旭,博士研究生,研究方向为油气储运技术及油气管道安全。E-mail:dx_sun@yahoo.com。
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