摘要 |
PURPOSE:To simplify the construction of an exhaust pipe system by placing porous filter sections and muffler sections in a storage casing. CONSTITUTION:A porous filter section A is formed by both a hollow cylindrical filter element 10 made of a porous material and a cylindrical filter element 11 with a small size in diameter, which has been formed into a pillar made of a porous material as well. A series of muffler sections B are formed between a storage casing 13 and the porous filter section A and between the said filter sections. Fine grains in an exhaust gas flow 4 are caught by those elements 10 and 11 while they pass through the elements 10 and 11, which are placed one after the other, and the exhaust gas is discharged after the flow 4 has been turned in a purified exhaust gas flow 4a. An energy level of noise by the discharge gas flow 4 is lowered at the muffler sections B while the flow 4 passes through the porous filter elements. |