LNG接收站BOG处理系统的计算及选型

发布时间：2018-01-12 11:12

本文关键词：LNG接收站BOG处理系统的计算及选型　出处：《华南理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：近10余年来,随着我国能源需求的不断增强,我国进入了大型液化天然气(Liquefied Natural Gas,LNG)接收站、调峰站、天然气液化工厂的建设高峰期,经过不断实践,我国LNG接收站在数量和规模方面都有较大提升。根据全球LNG产业发展近况及我国现阶段天然气供应所面临的一系列问题,我国接收站的建设采取的对策为:合理规划格局,构建沿海与陆地稳定供应的天然气管网;实施LNG供应多元化,逐步优化消费结构;积极带动LNG相关产业的发展,实现天然气产业市场化的长远发展目标。蒸发气(Boiled-off Gas,BOG)处理系统是接收站最复杂的部分,主要包括BOG压缩机系统及火炬系统。BOG处理系统的平稳运行关系到整个接收站的安全稳定性,其流量计算结果是BOG压缩机、BOG入口缓冲罐、火炬系统、BOG总管等设备和管线的选型基础。受卸船、管线漏热、低压泵散热、体积置换和天然气下游多种用户用气不均匀性等多种因素影响,接收站BOG产生量和LNG外输量呈现实时的波动特性。本文以某LNG接收站为基础,选取Pro II作为流程模拟工具,分析影响接收站BOG产生量的各个因素,将接收站的工艺流程划分为卸船、外输、装车等基本单元,对BOG压缩机及火炬系统的计算方法进行了优化,使之更接近接收站的实际运行过程。并在8种不同工况下对各单元进行计算与汇总,根据计算结果完成BOG压缩机选型。本文的计算方法及选型结果可直接运用于大型LNG接收站,为接收站关键设备的选型及BOG处理系统的优化提供了理论依据,具有较大工程实际意义。
[Abstract]:In the past 10 years, with the increasing energy demand in China, China has entered the large liquefied natural gas (LNG) receiving station and peak-shaving station. The construction peak of natural gas liquefaction plant has been practiced continuously. The number and scale of LNG receiving stations in China have been greatly improved. According to the recent development of global LNG industry and a series of problems faced by China's natural gas supply at the present stage. The countermeasures adopted in the construction of the receiving station in China are as follows: reasonable planning pattern, construction of natural gas pipeline network with stable supply of coastal and terrestrial gas; Implement LNG supply diversification and gradually optimize consumption structure; Promote the development of LNG related industries, realize the long-term development goal of natural gas industry marketization. Evaporation gas Boiled-off Gas. The bog) processing system is the most complex part of the receiving station. The smooth operation of the BOG compressor system and the torch system. Bog processing system is related to the safety and stability of the whole receiving station. The results of flow calculation are based on the selection of equipment and pipelines, such as BOG compressor inlet buffer tank, torch system bog pipe and so on. Because of the influence of volume displacement and gas inhomogeneity in downstream of natural gas, the output of BOG and the output of LNG at receiving station show real time fluctuation characteristics. This paper is based on a certain LNG receiving station. Pro II is selected as a process simulation tool to analyze the factors that affect the output of BOG in the receiving station. The process flow of the receiving station is divided into basic units such as unloading, outputting, loading and so on. The calculation method of BOG compressor and torch system is optimized to make it more close to the actual operation process of the receiving station, and each unit is calculated and summarized under 8 different working conditions. According to the calculation results, the selection of BOG compressor is completed. The calculation method and the selection result of this paper can be directly applied to large LNG receiving station. It provides a theoretical basis for the selection of the key equipment of the receiving station and the optimization of the BOG processing system, which is of great engineering significance.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE974

【参考文献】