Patent ID: 6375695
Filing Date: 2002-04-23
Classification: F01N,F02B,Y10S

Abstract:
An exhaust gas treatment apparatus through which an exhaust gas containing fine particles is passed along a flow direction, comprising:a first filter comprising a first filter main body, a first counter room provided downstream of the first filter main body, and a second counter room provided upstream of the first filter main body; a second filter comprising a second filter main body, a first counter room provided downstream of said second filter main body, and a second counter room provided upstream of said second filter main body; first and second exhaust gas inlets for separatedly supplying exhaust gas to said first and second filters, respectively, said first and second exhaust gas inlets being connected to and receiving exhaust gas from a common inlet pipe; first and second exhaust gas outlets for discharging exhaust gas from the first and second filters, respectively; a process portion isolated from exhaust gas flow through the filters, in which fine particles removed from the filters are fired; transport means for interconnecting each of the second counter rooms to said process portion; a counter air supply means for supplying a counter flow of air to the first counter rooms, along a flow direction opposite to the flow direction of the exhaust gas, said counter air supply means being located (1) so that the flow direction of the counter air from said counter air supply means into the first counter rooms is perpendicular to a through hole of a filter main body and (2) separate from said exhaust gas outlets; first and second exhaust gas supply valves provided in the first and second exhaust gas inlets, respectively; and first and second exhaust gas discharge valves respectively provided in said fist and second exhaust gas outlets.