Flow Field Analysis And Structure Optimization Of Oil-Water Hydrocyclone Coalescing Separator

In this paper,the research background,the common oil-water separation technology are introduced briefly.In this paper,six kinds of aggregators with different structures are designed based on the conventional cyclone separator.The optimum coalescer structure V is obtained by numerical simulation and comparative analysis of several cross sections.In order to improve the separation ability a swirl oil-water separator in series with the concentrator is designed.The three-dimensional modeling software Solidworks,the grid division software Gambit,and the computational fluid dynamic software Fluent are used to model the turbulent model of the oil-water hydrocyclone coalescing separator in this paper,and the grid division,the check of the grid independence and the numerical simulation are carried out.The single factor method is used to optimize the structural parameters of the cyclone separator,such as the number of spiral heads,the angle of the cone and the length of the bottom flow tube.The coalescence effect was tested by comparing the volume content and the separation efficiency of the oil phase after operation of the separator and the installation of the coalescer.The results show that the separator with the coalescer structure has a larger oil phase volume content at the overflow pipe,which proves that the coalescer has a certain improvement on the separation of small particle size oil droplets.At the same time,When the V-type coalescer and the separator are composed of the VII-V oil-water hydrocyclone coalescing separator,the separation efficiency is the highest and the oil phase volume fraction is the largest at the overflow pipe.For the convenience of analysis,multiple sections are selected on the oil-water hydrocyclone coalescing separator,and the optimal operating parameters are optimized by numerical simulation and comparison,and the optimal structural parameters are processed according to the numerical simulation to test the prototype.The separation test and comparison with the simulation results show that the structure has better separation performance under the optimum operating parameters.The process flow and main test equipment of particle image velocimetry PIV test are introduced.The velocity field of three different cross-sections of the optimized oil-water hydrocyclone coalescing separator is tested by PIV technology.The axial velocity is studied at different flow rates.The variation law is compared with the simulation results to verify the accuracy of the numerical simulation.