摘要
投产初期LNG接收站的外输量较小,需要在最小外输量下运行;接收站主要起调峰作用,天然气外输需求不稳定,随时可能在最小外输量下运行,因而影响接收站的安全运行。分析了影响最小外输量的主要因素,由BWRS方程和能量、质量守恒定律,确定再冷凝器回收BOG所需的最小LNG流量,同时采用二分法确定运行SCV时的最小外输量。据此,以Force Control V7.0为平台,设计出LNG接收站不同参数下最小外输量的计算软件,并以大连LNG接收站实际运行参数验证其可靠性,计算结果表明:大连LNG接收站正常运行ORV的最小外输量为375.65×104 m3/d,运行SCV的最小外输量为322.82×104 m3/d,与实际运行数据380×104 m3/d和320×104 m3/d非常接近。
In the initial operation, the LNG terminal should run at the minimum sendout rate. It mainly plays a role of peak shaving. When the demand for natural gas sendout is instable, the terminal may be running at the minimum sendout rate at any time, which influences the safe operation of the terminal. In this paper, main factors influencing the minimum sendout rate are analyzed; by BWRS equation and the law of energy and conservation of mass, the minimum LNG flowrate required for BOG recycling of recondenser is determined; the minimum sendout rate at SCV mode is defined by dichotomy. Hereby, taking the Force Control V7.0 as a platform, the software to calculate minimum sendout rate of LNG terminal with different parameters is designed, and its reliability is verified by the actual operating parameters of Dalian LNG Terminal. The results show that the minimum sendout rate of Dalian LNG Terminal at ORV mode and SCV mode is 375.65×10^4 m^3/d and322.82×10^4 m^3/d respectively, which are very close to the actual operating data of 380×10^4 m^3/d and 320×10^4 m^3/d.
出处
《油气储运》
CAS
北大核心
2015年第3期303-309,共7页
Oil & Gas Storage and Transportation
