Patent ID: 9097421
Filing Date: 2015-08-04
Classification: F23B,F23H,F23J

Abstract:
1. An enclosed granular fuel burning boiler including: an enclosed combustion chamber; a fuel-fired brazier mounted in the combustion chamber and comprising an apertured brazier base and upstanding side walls, namely, a proximal wall, a distal wall at least portion of which distal wall adjacent the base is either vertical or inclined downwardly and away from the proximal wall, and a pair of connecting side walls; an actuator for moving the brazier base from an operative position retaining fuel in the brazier to a discharge position to allow ash contents to fall out of the brazier; fragmentation means comprising a vitrified ash engaging crushing tooth mounted on and projecting upwardly from the brazier base whereby, on moving the brazier base to the discharge position, the vitrified ash engaging crushing tooth moves the vitrified ash across the brazier from the proximal wall and against the opposed distal wall; a plenum chamber mounted outside the combustion chamber; a fan for delivery of air from the plenum chamber to the brazier; and a burner hood projecting over the brazier and forming part of a substantially sealed brazier enclosure mounted on a side wall of the boiler, the brazier enclosure including an enclosure base and two upstanding spaced-apart side walls carrying the burner hood and the brazier's upstanding side walls, the enclosure base having an enclosure ash contents discharge hole, a movable support plate having an upright end wall forming portion of the brazier enclosure and having a support plate discharge hole offset from the ash contents discharge hole when in a boiler firing condition, the support plate carrying the brazier base.