EXHAUST PURIFICATION DEVICE

PROBLEM TO BE SOLVED: To provide a compact exhaust purification device suitable for dispersion of exhaust gas against an oxidation catalyst. SOLUTION: A silencing structure 2 arranged on an upstream side along a gas flow direction D of the oxidation catalyst comprises: a dispersion plate 6 for dividing the inside of a casing 5 into a dispersion chamber 7a on an upstream side along the gas flow direction D and a dispersion chamber 7b on a downstream side along the gas flow direction D; and an inner pipe 8 which is inserted from the outside of the dispersion chamber 7a into the dispersion chamber 7a, where a plurality of holes 9a, 9b, 9c, and 9d tapered in diameter from the upstream side along the gas flow direction D to the downstream side in sequence are bored around a circumferential section, and whose end is firmly fixed on the dispersion plate 6. The plurality of holes where an outer circumferential side in the radial direction have a large diameter and a center side have a small diameter are bored at sections located in the dispersion chambers 7a, 7b of the dispersion plate 6. COPYRIGHT: (C)2009,JPO&INPIT