炼油技术与工程 ›› 2021, Vol. 51 ›› Issue (3): 65-68.

• 能量利用 • 上一篇    下一篇

LNG接收站冷电联产工艺方案研究

李战杰, 汪红, 李文龙, 宋肖的   

  1. 中石化广州工程有限公司,广东省广州市 510620
  • 收稿日期:2020-11-25 修回日期:2020-12-28 出版日期:2021-03-15 发布日期:2021-07-16
  • 作者简介:李战杰,高级工程师,1997年毕业于江苏石油化工学院油气储运专业。联系电话:020-22192702,E-mail:lizj.lpec@sinopec.com。

Research on combined cooling and power generation process in LNG terminal

Li Zhanjie, Wang Hong, Li Wenlong, Song Xiaodi   

  1. SINOPEC Guangzhou Engineering Co., Ltd., Guangzhou, Guangdong 510620
  • Received:2020-11-25 Revised:2020-12-28 Online:2021-03-15 Published:2021-07-16

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摘要： 为提高液化天然气(LNG)接收站冷能利用率,实现经济效益、社会效益和环境效益最大化,对不同冷能利用方案的工艺效率进行分析并提出可行的工艺方案。结合国内某大型LNG接收站的工程实际,选取C2H6,C2H2F2,CClF3,CHF3,C2F6,CF4和CH4作为工质进行模拟计算,最终选用C2F6作为循环工质,并选择氯化钙溶液作为载冷剂。采用有机朗肯循环低温发电技术和30%(质量分数)氯化钙溶液外输冷量相结合的方式,对满发电和部分发电工艺方案进行对比研究,发现采用满发电工艺方案的净发电量和制冷量大于部分发电工艺方案,能够产生更大的经济效益。

关键词: LNG接收站, 冷电联产工艺, 有机朗肯循环, 载冷剂, 有机工质

Abstract: In order to increase the utilization rate of cold energy in LNG terminal and maximize economic, social and environmental benefits in engineering, it is necessary to analyze the process efficiency of different cold energy utilization schemes and propose feasible process schemes. Based on the actual project of a large domestic LNG terminal, C2H6, C2H2F2, CClF3, CHF3, C2F6, CF4 and CH4 are selected for comparison calculation, and C2F6 is selected as the circulating working fluid of the cold energy utilization power generation system of the LNG terminal, calcium chloride solution is selected as the secondary refrigerant. Using organic Rankine cycle low-temperature power generation technology and 30% (mass concentration) CaCl2 solution external cold transfer method, the full power generation process scheme and partial power generation process scheme are compared. The net power generation and cooling capacity of full power generation process scheme are greater than that of partial power generation process scheme, which can generate greater economic benefits.

Key words: LNG terminal, combined cooling and power generation process, organic Rankine cycle, secondary refrigerant, organic working fluid