Numerical Simulation Of Flow Field Of Gravity Settler

In company with the increase of water content, the current issue of universal concern is how to improve the efficiency of oil -water separation. This paper will research the gravity settler in the oilfield, and using the FLUENT simulation software to analyse the three-dimensional flowfield of gravity settler whose volume is 3000m3. The main research contents and conclusions of this paper are as follows:This paper mainly studies on the impact which the different parameter of liquid distributor and its hole lead to the different internal flowfield, in order to receive specific information on the concentration field and velocity field, and to guide the design of gravity settler and on-site reconstruction. First, analyse of the geometric structure of gravity settler and simplified, summarized a set of suitable mesh of this model approach, and then to determine a reasonable turbulence model as the RNG k -? model, multiphase-flow model as the mixture model and reasonable boundary conditions, and so on. Through analyse the seven structural parameters of liquid distributor, to get the information of their flowfield, and find the combination which have the most efficient oil-water separation and the most reasonable flowfield. These structural parameters produce to the different impact of the oil-water separation, the relatively large effect is the diameter of liquid distributor and the hole shape in the all parameters.The final gravity settler model is the liquid distributor whose diameter is DN300 and whose numbers is 4, and whose height far away from the bottom is 1.5 meters, while, the hole whose radius is 80 millimeters, and whose numbers is 5, and who is equidistance.