[논문]Solids concentration simulation of different size particles in a cyclone separator

Wan, G.; Sun, G.; Xue, X.; Shi, M.

doi:10.1016/j.powtec.2007.11.019

Solids concentration simulation of different size particles in a cyclone separator

Powder technology, v.183 no.1, 2008년, pp.94 - 104

Wan, G. (Faculty of Chemical Science and Engineering, China University of Petroleum, Beijing, 102249, China) , Sun, G. , Xue, X. , Shi, M.

Abstract ▼ AI-Helper

To deepen our knowledge of the flow in cyclones, the solids concentrations of different size particles in a scroll cyclone separator were numerically simulated by using the Lagrange approach on the platform of commercial CFD software package, FLUENT 6.1. The numerical calculations visualize that there exists a spiral dust strand near the cyclone wall and a dust ring beneath the cyclone top plate. There are two regions in the radial solids concentration distribution, with which the solids concentration is low in the inner region (r/R(dimensionless radial position)@?0.75) and increases greatly in the outer region (r/R>0.75). Large particles generally have higher concentration in the wall region and small particles have higher concentration in inner vortex region. The axial distribution of the solids concentration in the inner vortex region (r/R@?0.3) shows that serious fine particle re-entrainment exists within the height of 0.5 D (cyclone diameter) above the dust discharge port. We study the effect of solids particle on the gas flow field by two-way couple. The concepts of back-mixing rate, first escaping rate and second escaping rate are proposed for quantifying the local flow phenomena.

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참고문헌 (20)

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Solids concentration simulation of different size particles in a cyclone separator

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