CAJ | 학술논문

近几年，随着大型 LNG 接收站的快速发展，LNG 冷能利用的研究也日益迫切。利用LNG冷能回收其中高附加值的C＋2轻烃则是一种有效的方式。提出了一种利用LNG冷能回收轻烃的改进流程，利用脱甲烷塔进料为脱乙烷塔塔顶冷凝器提供冷量，得到液态乙烷和C＋3，方便产品的储运。以国内某LNG接收站的富气为例，模拟计算得到：该流程中C＋3收率可达97．5％，乙烷回收率可达95．78％。对装置的经济性进行了分析，结果表明，使用该流程进行轻烃回收效益显著。并提出了L N G冷能用于轻烃回收工艺中冷能利用率的计算方法，得到单独采用该流程的冷能利用率为38．93％。针对LNG组分、温度等参数进行了敏感性分析，考察对C＋3收率、乙烷回收率及能耗的影响，可以为接收站的优化运行提供指导。
근궤년，수착대형 LNG 접수참적쾌속발전，LNG 랭능이용적연구야일익박절。이용LNG랭능회수기중고부가치적C＋2경경칙시일충유효적방식。제출료일충이용LNG랭능회수경경적개진류정，이용탈갑완탑진료위탈을완탑탑정냉응기제공랭량，득도액태을완화C＋3，방편산품적저운。이국내모LNG접수참적부기위례，모의계산득도：해류정중C＋3수솔가체97．5％，을완회수솔가체95．78％。대장치적경제성진행료분석，결과표명，사용해류정진행경경회수효익현저。병제출료L N G랭능용우경경회수공예중랭능이용솔적계산방법，득도단독채용해류정적랭능이용솔위38．93％。침대LNG조분、온도등삼수진행료민감성분석，고찰대C＋3수솔、을완회수솔급능모적영향，가이위접수참적우화운행제공지도。
In recent years ,with the rapid development of large LNG terminals ,the research of LNG cryogenic energy utilization is increasingly urgent .C+2 light hydrocarbons ,which are resources with high additional values ,can be separated from LNG by efficiently utilizing its cryogenic energy . An improved process of light hydrocarbons separation is proposed in this paper :the cold energy of the demethanizer feed is provided to the condenser of the deethanizer for liquefied ethane and C +3 ,w hich are easy to be stored and transported .Then ,a case study of applying the process was carried out for the rich LNG of a domestic LNG terminal ,which indicated that the recovery rate was about 97 .5%for C+3 ,and about 95 .78% for ethane .And the economics of the process was studied .The results showed that recovering light hydrocarbons from LNG by this process could gain great profits .This paper also proposed a new calculation method of LNG cryogenic energy utilization rate for the process .It is concluded that LNG cryogenic energy utilization rate is 38 .93% with the process used a‐lone .Sensitivity analysis was conducted for the composition ,temperature and other parameters of LNG ,and the effects of them on the recovery rate of C+3 and ethane and the energy consumption were studied .It provided a guidance for optimal operation of the terminals .