Influence of Cone Structure on the Internal Flow Field and Classification Performance ofHydrocyclone
A method to improve the classification performance of the cyclone was proposed by modifying the cone section of the conventional cyclone to address the problems of low classification accuracy and high operating energy consumption.The influence of linear,parabolic,and hyperbolic conical structures of cyclones on the internal flow field characteristics and separation performance was presented through numerical calculation methods.The numerical results show that using a parabolic cone can reduce the tangential and axial velocities of the cyclone,reduce the probability of turbulence,and effectively improve the stability of the flow field.The internal flow field of the hyperbolic cone is unstable,which is not conducive to the smooth operation of particles.The zero speed envelope surface of the parabolic cyclone moves outward,increasing the space for fine internal swirling flow and allowing for sufficient separation of fine particles,resulting in a certain improvement in classification accuracy.Compared to conventional and hyperbolic models,parabolic cyclones have lower turbulence intensity and effectively improve particle stability.At the same time,the steepness index of parabolic cyclones has been increased from 0.61 to 0.72,greatly improving the classification accuracy of cyclones.Due to the increase in separation space,the cutting particle size has slightly increased.
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