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组装式内浮顶罐可降低油品的损耗率,在吐哈油田得到应用,但存在钢制浮盘易沉落,铝制浮盘损坏严重等问题。其主要原因是油品含气量大,浮盘在气流的冲击下受力不均匀,进罐油管伸入较短,使靠近油管处的浮盘受向上的顶力较大;在运行过程中经常出现油罐液位低于正常值,而使罐内呈负压,使浮盘立柱常落至罐底与罐底相撞,同时主柱的反作用力对浮盘产生冲击,甚至击穿浮船;由于季节性温差大,夏季油罐外表面温度可达 70℃以上,势必造成软密封胶带老化,在冬季由于罐内油品需用蒸汽加热,也使软密封胶带老化,这样降低了密封效果,造成油气外溢。综上所述,采取了在浮盘上开泄压孔;改进进油管安装形式和增加长度;严格控制油罐最低液位;加固铝制浮盘等技术措施。
Assembled floating roof tank can reduce the loss rate of oil, applied in Tuha oil field, but there are easy to sink steel floating tray, aluminum floater serious damage and so on. The main reason is the gas content of the oil, the floating plate in the impact of the impact of uneven pressure into the tank into the short tube, so that near the tubing at the top of the floating force by a larger force in the operation process often The tank liquid level is lower than the normal value, leaving the tank negative pressure, so that the floating column often fall to the tank bottom collide with the tank bottom, while the reaction of the main column on the impact of the floating plate, and even breakdown of the pontoon; As the seasonal temperature difference, the summer outer surface temperature of the oil tank up to 70 ℃, will inevitably lead to the aging of the soft sealing tape, oil in the tank due to the need for steam heating, also make the soft sealing tape aging, thus reducing the sealing effect, Cause oil and gas spills. To sum up, taken to open the vent hole on the floating plate; to improve the installation form and increase the length of the inlet pipe; strict control of the lowest level of the tank; reinforcing aluminum floating tray and other technical measures.