浮船式浮顶油罐单盘积油原因

以临邑泵站１０号罐两次单盘积油为例，分析了单盘油原因，给出了积油原因关系图。根据此关系图检查分析了１０罐积油诱因，是由于罐壁板变形使浮顶与罐壁间隙过小，浮船附件与罐壁接触，泡沫密封强行压缩，加大浮船运动阻力；而人孔螺丝未上紧，人孔盖处于自由状态，加之浮顶积水过深，荷载加大，并呈不均匀分布，铪顶偏斜并卡阻，是造成积油的直接原因。提出了预防单盘积油的措施。

Analyzing Why Oil is Stored on the Pontoon of Floating Roof Tank

This paper analyzes why oil is stored on the pontoon of floating roof of tank,and shows the reason relationship diagram for oil stored on pontoon from the example that oil has been stored on the pontoon of 10# tank two times in Linyi pump station. According to the reason relationship diagram, it is clear that the deformation of side-wall made the gap between the side-wall too narrow and attachment of floating roof contacted side-wall directly,and the foam seal elastic element was pressed tightly,and the floating roof can not move up and down freely. Because the flange bolts of manway of pontoon had not been tighten,the cover of manway had been out of seal, the more the rain water stored on the pontoon, the bigger the load on pontoon,and the load was not even,so floating roof was sloped and blocked,the oil level raised over manway, and oil was slopped from manway,then oil was stored on the pontoon. This paper also shows some measures to protect oil stored on pontoon.