大气压对液化天然气罐群接收站设计和运营的影响  

Effect of Atmospheric Pressure on the Design and Operation of Liquefied Natural Gas Tank Group Receiving Terminals

作　　者：姜夏雪[1] 安东雨 陈锐莹[1] JIANG Xia-xue;AN Dong-yu;CHEN Rui-ying(CNOOC Gas&Power Group,Beijing 100028,China)

机构地区：[1]中海石油气电集团有限责任公司,北京100028

出　　处：《石油化工设备》2020年第6期6-10,共5页Petro-Chemical Equipment

基　　金：中国海洋石油集团公司重大专项“LNG罐群接收站的关键技术研究”(CNOOCKJ135KJXMQD2019-002)。

摘　　要：准确计算蒸发气的产生量对液化天然气罐群接收站的设计和生产运营具有重要影响。从接收站蒸发气产生量的计算出发,浅析了蒸发气产生量随接收站规模增大而增加的原因。基于河北某液化天然气罐群接收站的数据,分别计算了大气压正常变化率为0.5 kPa/h、0.74 kPa/h、2 kPa/h时不同建设阶段和操作模式下的蒸发气产生量,并以福建某接收站的大气压变化率值计算对比了相同配置下的罐群接收站蒸发气产生量。结果表明,储罐数量越多,大气压变化率引起的蒸发气产生量占比越大,设计采用储罐表压控制的罐群接收站时需重视大气压变化对其设计和运营的影响。对新建的罐群类接收站,可采用储罐绝对压力控制方式。在建设场地受限情况下,可考虑采用离心压缩机取代传统的往复式压缩机。Accurate calculation of the amount of boil-off gas(BOG)generated has an important impact on the design and operation of the tank group liquefied natural gas(LNG)receiving terminal.Based on the calculation of BOG production volume at the receiving terminal,the reasons for the increase of BOG production with the increase of the size of the receiving station were analyzed.The amount of BOG produced at normal change rate as 0.5 kPa/h,0.74 kPa/h,and 2 kPa/h of atmospheric pressure in different construction stages and operating modes of a receiving station in Hebei province was calculated.At the same time,the atmospheric pressure change rate of a station in Fujian province was compared with the same configuration is shown.The results show that the greater the number of storage tanks,the greater the proportion of BOG production caused by the atmospheric pressure change rate.When the storage tanks are controlled by gauge pressure,the impact of atmospheric pressure changes on the design and operation of tank group receiving stations needs to be considered.For newly built tank group receiving stations,the absolute pressure control method of storage tanks can be adopted.In the case of limited construction sites,centrifugal compressors can be used to replace traditional reciprocating compressors.

关 键 词：储罐 接收站 液化天然气 大气压 蒸发气 设计 

分 类 号：TQ053.2[化学工程]