Optimization Of Gas-liquid Cyclone Separator Based On Varios Structure Factors

Gas-liquid cyclone separator which has advantages of a high separation efficiency, small size of equipment,long period running and so on,has been widely used in mineral processing,petroleum, environmental protection and any other industrial fields. You can’t have perfect results of analysising gas-liquid cyclone separator performance from a single structure factor,because the internal flow field of gas-liquid cyclone separator is complex, and each branch structure size fit very close, with mutual assistance restriction relationship.There are few reports that how many structure size and multi-factor synergism effect on separator today,so this paper focuses on to study,that is, the exhaust pipe diameter, exhaust pipe insert depth, exhaust pipe offset angle, exhaust pipe offset distance and bottom LiuKou backmixing taper conical bottom area ratio.Design orthogonal test, with 5 factors 4 levels of orthogonal table, set 16 representative horizontal combination models and carry on the numerical simulation by using Fluent.The RSM model and DPM model are respectively used to simulate gas phase and liquid phase.To liquid simulation model in each group, we can determine the gas-liquid distribution separation performance by the quality percentage of escape vent droplet size.We find the primary and secondary order of the influence of the various factor optimization combination and various factors on the separation efficiency and pressure drop on 16 set of orthogonal experiments. The exhaust pipe diameter had the greatest influence on pressure drop, backmixing prevention at the bottom of the cone bottom area ratio had the greatest influence on the separation efficiency and exhaust pipe insert depth impact on the two indicators are minimal. And then we find the optimal combination through the comprehensive balance method, that is, the exhaust pipe diameter is0.3D, the exhaust pipe insert depth is 1.4a, the exhaust pipe offset distance is 8mm, exhaust pipe offset angle is 270°,and conical bottom area ratio is 60%. Finally we analyze the optimization structure under the droplet diameter and inlet velocity on the pressure drop and separation efficiency. Changing the droplet diameter, results through the simulation show that the optimization structure is applicable to any size droplets and the larger diameter droplets can be completely separated. Inlet velocity has a significant influence on the separation efficiency, the faster inlet velocity, the greater the pressure drop in cyclone separator, the greater the energy consumption of separator, the lower efficiency,the smaller inlet velocity,so gas-liquid separation is not complete and separation efficiency reduces.