Gao Tieyu,Zhang Jianying,Xu Tingxiang
(School of Energy and Power Engineering,XI'an Jiaotong University,Xi'an 710049,China)
Abstract：Based on the fluid mechanics in porous media and aerodynamics, the effects of the ceramic particle diameter on the pressure drop, permeability passing porous ceramic media, and filtering efficiency are analyzed. Theoretical fundamental is provided for selecting the ceramic particle diameters of ceramic filter media. Theoretical results show that when particles are supposed to be the shape of ball, and the filling mode of ceramic particles is single ball, the pervasion rate of ceramic media is proportional approximately to second power of ceramic particle diameter. But the pressure drops are approximately in inverse proportion to second power of ceramic particle diameter. When ceramic particles are mingled, the ratio of particle amount to diameter should keep constant, or the arrangement of particles will be disordered, thus decreasing the efficiency of filter. The ceramic particle diameter of 20 micrometers or so is suitable for the filter media used as the filters of the intergrated gasification combined cycle (IGCC).
Keywords：ceramic filter;pressure drop;permeability;filtering efficiency