Abstract: The application discloses a particulate solid fuel combustion system for kilns and the like. A particulate solid fuel such as powdered coal, is supplied to a fluidized bed conveyor. Selected quantities of coal are withdrawn to air entrainment devices where the coal is entrained in a jet of a gas and delivered to a burner. The firing rate is controlled responsive to requirements of the kiln.
Abstract: A roller dryer for clay pipe comprised of a support means for transporting pipe through a tunnel dryer and roller carriage means for rotating the pipe to achieve uniform drying thereof. The roller dryer can accommodate pipes of different lengths and diameters while maintaining the lineality and concentricity of the pipe sections.