Patent ID: 7097814

Claim:
An apparatus for treating an exhaust gas, the apparatus comprising: (a) an inlet duct through which the exhaust gas is flowed in, (b) a bend portion, and (c) a catalyst duct connected to the inlet duct through the bend portion, and having a catalyst used for purifying the exhaust gas and disposed in the catalyst duct, the apparatus further having a baffle structure comprising plural baffle plates disposed at the inlet of the catalyst duct in the direction of the cross section of the catalyst duct, wherein the plural baffle plates are formed and arranged so that the heights of the baffle plates being first gradually increased from the extremity of the inlet duct side to L 1 and then maintained constant from L 1 to L 0 when the distance from the extremity of the inlet duct side to the extremity of the bend portion was assumed to be L 0 and a prescribed distance in between was assumed to be L 1 , respectively.