Improving Efficiency of Hot Water Cleaning in Mechanical Cleaning for Large Crude Oil Storage Tanks

　　Combined with present situation and craft of mechanical cleaning of large crude oil storage tanks, aimed at the problem of low efficiency in the hot water cleaning stage, the reasons were analyzed from the water consumption, the arrangement of the spray gun and cleaning process. the sucking efficiency of floating oil in the tank and oil water separation efficiency of oil sewage. Through the measures of the design and installation of suction auxiliary device, warm water jet device and other new devices, spray gun arrangement scheme and cleaning process based on the position of the suction port were proposed and the cleaning temperature was targeted controlled. The water consumption and cycle cleaning times were reduced, and sucking efficiency and oil-water separation efficiency of the floating oil in the tank were increased. The hot water cleaning efficiency was effectively improved in the actual task, and the working time was saved by more than 2/3.