Abstract
An anti-mixing cover is presented to restrain the generation of unsteady flow and back-flow phenomena in the separation chamber of a cyclone separator with reduced height. Structure of the anti-mixing cover is proposed based on the Barth balance orbit theory hypothesis. In order to clarify the effect of the anti-mixing cover on the separation efficiency of the cyclone, a numerical model was established by means of the Euler-Lagrange approach. The simulation results are in good agreement with the experimental data and several empirical formulas in the range of inlet air velocity 18 m/s~23 m/s. As results, the anti-mixing cover effectively enlarged the centrifugal force acting on particles and reduced the vortex intensity at the bottom of the cyclone. Moreover, the rising dust-laden airflow is also blocked by the anti-mixing cover which leads to less back-mixing phenomena.
Highlights
Cyclone separator is a kind of facility that separates solid particles from airflow by centrifugal force using the theory Gas-solid two-phase flow [1]
Many scholars have conducted various experiments on the eddy current disturbance in the internal swirl zone of standard Stairmand cyclone separator, few study have been done on the Stairmand cyclone separator with reduced height, especially after adding anti-mixing cover in the cylinder [8]
An anti-mixing cover is proposed to restrain the generation of unsteady flow and back-mixing phenomena in in the separation chamber a cyclone separator
Summary
Cyclone separator is a kind of facility that separates solid particles from airflow by centrifugal force using the theory Gas-solid two-phase flow [1]. Many scholars have conducted various experiments on the eddy current disturbance in the internal swirl zone of standard Stairmand cyclone separator, few study have been done on the Stairmand cyclone separator with reduced height, especially after adding anti-mixing cover in the cylinder [8]. This article presents a numerical study method of adding an anti-mixing cover in the inner part of the cyclone separator after shortening the height. Where, mp, ρp, ρc, CD, dp, vc, vp are particle mass, density, air density, drag coefficient, particle diameter, air velocity and particle velocity; Schiller Naumann [15] empirical model is selected for the drag coefficient simulation This model is suitable for the viscous and transition zone of particles with very small Re, in other words, the boundary layer separation zone near the wall [16].
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