Abstract: An apparatus mounted to an enclosure housing of a water entrained ash hopper for dislodging ash pluggages across an ash discharge opening in the ash hopper to maintain passage of ash from the ash hopper. The apparatus comprising a plate rotatably and sealingly connected to the enclosure housing, and a cylinder, mounted to the plate. The cylinder mounted to the plate such that a rod assembly extending from the cylinder is angularly disposed through the plate toward the ash discharge opening so as to be selectively extendable through a selected area of the ash discharge opening along an arc-shaped path. The piston movable from a retracted position to an extended position such that the rod extends into the ash discharge opening to dislodge ash pluggages disposed across the ash discharge opening. The rod assembly adapted to convey a stream of high pressure fluid against the ash pluggage.

Abstract: A lump breaker apparatus mounted to an airlock of an economizer ash hopper for breaking up ash clinkers accumulated on a grating disposed in the airlock to maintain the passage of ash through the grating of the airlock. The apparatus comprising a pneumatic cylinder having a rod extending therefrom with a ramming plate connected to a distal end thereof and slidably disposed on the grating of the airlock, a mounting assembly for mounting the cylinder to the airlock and a seal assembly for providing a slidable seal about the rod. The ramming plate reciprocally movable from a retracted position to an extended position along the grating to impact the ash clinkers on the grating of the airlock with sufficient force to fragment such ash clinkers and to permit the passage of some ash clinkers through the grating.

Abstract: An apparatus mounted to an enclosure housing of a water entrained ash hopper for dislodging ash pluggages across an ash discharge opening in the ash hopper to maintain passage of ash from the ash hopper. The apparatus comprising a plate rotatably and sealingly connected to the enclosure housing, and a cylinder, mounted to the plate. The cylinder mounted to the plate such that a rod assembly extending from the cylinder is angularly disposed through the plate toward the ash discharge opening so as to be selectively extendable through a selected area of the ash discharge opening along an arc-shaped path. The piston movable from a retracted position to an extended position such that the rod extends into the ash discharge opening to dislodge ash pluggages disposed across the ash discharge opening. The rod assembly adapted to convey a stream of high pressure fluid against the ash pluggage.