低温液体BOG再液化技术在小型LNG储罐的应用分析

Application Analysis of Cryogenic Liquid BOG Reliquefaction Technology in Small LNG Storage Tank

对LNG储存和运输过程中产生的BOG进行有效处理,保证LNG高效、安全储存和运输是制约清洁能源LNG产业发展的主要因素之一。在对各种类型LNG站功能和BOG处理工艺介绍的基础上,重点分析小型LNG储罐内BOG产生机理,提出将低温液体BOG再液化技术应用于小型LNG储罐,并以某450L高真空多层绝热LNG储罐为例,选用美国Sunpower公司的Cryo Tel-GT型斯特林制冷机,从能量匹配关系,储存介质物理性质两方面分析其可行性。结果表明,将低温液体BOG再液化技术应用于小型LNG储罐可行,而且与各种类型LNG站BOG处理技术相比较,低温液体BOG再液化技术具有十分显著的优点。该研究为低温液体BOG再液化技术在小型LNG储罐上的应用提供理论依据与技术支持,对实现小型LNG储罐内BOG的处理以及LNG的高效安全、零蒸发储存均具有十分重要的意义。

Effective treatment of BOG generated during the storage and transportation of LNG to ensure efficient,safe storage and transportation of LNG is one of the main factors restricting the development of clean energy LNG industry. Based on the introduction of various types LNG station functions and BOG treatment technology,this paper mainly analyzes the mechanism of BOG production in small LNG Storage tank. It proposes to apply the cryogenic liquid BOG reliquefaction technology to small LNG. Taking a 450 L high vacuum multilayer insulation LNG storage tank as an example,the Cryo Tel-GT type Stryn refrigerator of American Sunpower company being selected,the paper analyzes this technology＇s feasibility in two perspectives： the matching of the energy and the physical properties of storage medium. The results show that it is feasible to apply BOG reliquefaction technology to small LNG. Compared with the BOG treatment technologies of various types LNG stations,cryogenic liquid BOG reliquefaction technology has significant advantages. The research provides a theoretical basis and technical support for the application of cryogenic liquid BOG reliquefaction technology in small LNG storage tank. It is of great significance for the treatment of BOG in small LNG storage tank,with efficient,safe,and zero-evaporation storage.