Plant for burning coal dust with reduced fresh air input - has air amt. lowered in cold air aspiration channel, leading from upper area of boiler housing to fan

摘要

The combustion chamber (1) is equipped with main burners (2) and their air boxes (3) together with flue gas return suction (4). The cold air aspiration conduit (5) leads from the upper area of the boiler housing to a fan (6) outside the housing. The pressure line from the fan issues in a air pre-heater (7). Beyond the pre-heater is a hot air conducit (8) which passes through the boiler housing side wall (20), and with corresp. distributors (9) to the air boxes. Between the cool air aspiration conduit and the hot air conduit the ambient air line (10) has a clack valve. In the hot air conduit is a cover (11) which issues in the combustion air conduit (12), which passes through the wall of the cold air conduit where it is retained by connectors (13,14). USE - To burn coil dust with reduced fresh air input.