Patent ID: 7461604
Filing Date: 2008-12-09
Classification: F23G,F23H,F23J,F23L,F23M

Abstract:
1. An inclined hearth combustor comprising: a primary combustion chamber having a plurality of stepped hearths, wherein at least one of said hearths of said primary combustion chamber comprises at least two spaced rows of air feed-tubes longitudinally embedded therein, said air feed-tubes terminating at a front face of said hearth for delivering a combustion gas into said combustion chamber; a secondary combustion chamber in communication with said primary combustion chamber, said secondary combustion chamber including a refractory-lined cyclone separator for removing fly ash from combustion gases exiting said primary combustion chamber; a boiler having an inlet in communication with said secondary combustion chamber, said boiler inlet being surrounded by said cyclone separator; and an air distribution plenum extending transversely across and intersecting with at least one row of said air feed-tubes embedded in said hearth for simultaneously delivering the combustion gas to at least one row of said air feed-tubes, wherein said air distribution plenum further comprises an elongate member having a central bore and a plurality of transverse holes communicating with said central bore for providing fluid communication between said central bore and said air feed-tubes, and wherein said air distribution plenum further comprises a pinch control valve connected with said central bore for controlling the mixture of the combustion gas fed into said central bore.