Numerical Simulation Research Of High Pressure Jet In Machinery Cleaning Of Storage Tanks

With long time storage of oil tank,there will be polymorphic sludge hanging in the tank wall and bottom, the polymorphic sludge will not only occupy the capacity of the storage tanks, but also affect the inspection and maintenance of the storage tank.Therefore, aimed at tackling storage oil tank sludge cleaning operations,it is necessary to clean the tank regularly. Mechanical cleaning is characteristic of more efficiency,more safety, low environmental pollution problems, and many other advantages relative to the manual cleaning, So many enterprises now are gradually adopting mechanical method of tank cleaning for oil tanks.Changing the way of high pressure jet,such as changing the flow parameters,medium properties, nozzle motion parameters, concluding the optimal cleaning parameters by comparison, which can effectively improve the efficiency of cleaning. So the fluid dynamics software Fluent is adopted to simulate the influence of different parameters on the efficiency of the mechanical tank cleaning.This paper used the Fluent software to do numerical simulation of the flow field in the tank, set up a numerical analysis model suitable for the study of high pressure tank cleaning, and used dynamic mesh technique and UDF program to implement the control of the nozzle move in the oil tanks. First on the rotation movement of the nozzle with the numerical simulation, analyze the influence of different motion parameters on the cleaning effect, and change fluid flow parameters based on the nozzle often periodic motion, analysis the changes in the cleaning effect under different jet pressure.Second,by changing the parameters of nozzle motion parameters and fluid flow parameters, analyzes the influence of mechanical tank cleaning effect,it can be concluded that the nozzle speed value range for the periodic motion under the same fluid flow parameters and medium properties. In the same medium, nozzle periodic motion, receive the jet speed and temperature optimal value area. Through the above analysis can provide some theoretical basis on storage tanks machinery cleaning for use in actual working condition.