FILTER APPARATUS FOR REMOVING COMBUSTIBLE FINE PARTICLE

PURPOSE:To remove filtered combustible particles efficiently by combustion, by a method wherein the wall structure of a filter is formed from a porous conductive ceramic and a voltage applying means is provided to the outer peripheral wall of the filter to heat the wall structure by passing a current therethrough. CONSTITUTION:In a filter apparatus for removing combustible fine particles in an exhaust gas, a wall structure is formed from porous conductive ceramic based on silicon carbide. A gas flowed in from the end surface 21 of a filter enters an inlet passage group 1 from each inflow port 3 and passed through a porous filter wall 7 to discharge only the gas through an outlet passage group 4. In this case, fine particles in the gas are collected by the filter wall 7 and only the gas is flowed out from each outflow port 4. At this time, when voltage is applied between both electrodes of the filter apparatus to pass a current, the filter wall generates heat to raise the temp. of combustible fine particles such as carbon particles and to remove the same by combustion.