Abstract: The invention provides a fluidized bed combuster for fuel or waste material, preferably having a fluidized bed which is arranged to circulate about a horizontal axis, in which one or more baffles are provided to define respective quiet zones adjacent the fluidized bed; material flowing in operation of the bed over the top of the baffle from the fluidized bed to the quiet zone and under the baffle from the quiet zone to the fluidized bed; and means is provided for feeding material to be burnt into the quiet zones to be carried therefrom beneath the baffles into the fluidized bed for combustion therein.

Abstract: The invention provides in a fluidized bed combustion apparatus including a housing and means for supporting and fluidizing a bed of granular material in the housing for the combustion of waste or other fuel material, an ash removal means comprising: an ash trough, arranged along an edge of the means for supporting the bed, for the collection of ash from the bed, comprising at least a bottom wall, and an aperture in the bottom wall for the exit of ash from the trough, valve means arranged in the aperture for the selective control of the flow of ash through the aperture from the trough, and pneumatic conveyor means arranged to convey ash and any bed material accompanying it from the aperture for disposal.

Abstract: The invention provides a fluidized bed combustion apparatus comprising in a common structure a plurality of modules, each module comprising: a diffuser bed support arranged to support and fluidize a bed of granular material by means of air diffusion into the bed, feed means for supplying material to be burnt to a bed supported on the bed support, and control means for controlling the operation of the bed independently of the operation of the other modules.