AIR POLLUTION CONTROL UNIT

摘要

The exhaust gas treatment device is provided with: an exhaust gas pipe (48) through which it is possible for combustion gases to flow; a heat recovery part furnished to the exhaust gas pipe (48) and capable of recovering heat from the exhaust gases; a harmful substance removal part furnished to the downstream side in the direction of exhaust gas flow from the heat recovery part in the exhaust gas pipe (48) and capable of removing harmful substances in the exhaust gases; and a popcorn ash trapping part (61) furnished between the heat recovery part and the harmful substance removal part in the exhaust gas pipe (48) and capable of trapping popcorn ash in the exhaust gases. In the popcorn ash trapping part (61) a plurality of protruding parts (66) which protrude towards the upstream side in the direction of exhaust gas flow are lined up along two intersecting directions.