TREATMENT OF EXHAUST GASES

摘要

A particulate separator comprises a housing (2) which receives the exhaust gas from a diesel engine. The housing (2) contains a conduit (4) formed with elongate slits (5) alternating with elongate V-shaped channels (6). These channels (6) provide access to a collection chamber (7) arranged at the far end of the conduit (4). Exhaust gases flow out of the conduit (4) through the slits (5), and particulates entrained in the exhaust gases are trapped in the channels (6) and travel into the collection chamber (7) where they are burned off by a heater (10) in the form of a length of high-resistance wire (11). Although some of the heavy particulates are trapped in the channels (6), other particulates travel under their own momentum in an axial direction and are impelled towards the channels (6) by a diverter (14). A filter (15) made from layers of flexible, woven ceramic fibre surrounds the conduit (4). The housing (2) comprises one or more layers of expanded metal (16) wound around the filter (15) and an outer metal cage (17).