Method and Apparatus for Improved Firing of Biomass and Other Solid Fuels for Steam Production and Gasification
OwnerEugene Sullivan, Daniel R. Higginsinventors
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Abstract
A ground supported single drum power boiler is described combining a refractory lined and insulated stepped floor; refractory lined and insulated combustion chamber; integrated fuel chutes configured to pre-dry wet solid fuel; internal chamber walls; configurable combustion air systems; a back pass with after-burner ports and cross flow superheaters; and a rear wall that acts as the downcomers feeding the other walls. A second embodiment is adaptable as a gasifier.
Claims27
A solid fuel fired boiler comprising one or more walls internal to the furnace section of the boiler, with said walls comprised of closely spaced steel tubes in mutually parallel relationship and aligned such that the axes of the tubes are vertical for the majority of their length, with said tubes comprising one or more water and/or steam circulation circuits within the boiler, with said wall or walls dropping through the roof of the boiler until one or more tubes but not all tubes comprising the internal wall or walls exits through a first wall of the boiler and the remaining tube or tubes exit through the opposite wall of the boiler.
Dependencies are inferred from the claim text.