Accession Number : ADD015462

Title :   Annular Vortex Combustor.

Descriptive Note : Patent, Filed 25 Nov 91, patented 23 Jun 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Nieh, Sen ; Fu, Tim T

Report Date : 23 Jun 1992

Pagination or Media Count : 8

Abstract : An apparatus for burning coal water fuel, dry ultrafine coal, pulverized coal and other liquid and gaseous fuels including a vertically extending outer wall and an inner, vertically extending cylinder located concentrically within the outer wall, the annular space between the outer wall and the inner cylinder defining a combustion chamber and the all space within the inner cylinder defining an exhaust chamber. Fuel and atomizing air are injected tangentially near the bottom of the combustion chamber and secondary air is introduced at selected points along the length of the combustion chamber. Combustion occurs along the spiral flow path in the combustion chamber and the combined effects of centrifugal, gravitational and aerodynamic forces cause particles of masses or sizes greater than the threshold to be trapped in a stratified manner until completely burned out. Remaining ash particles are then small enough to be entrained by the flue gas and exit the system via the exhaust chamber in the opposite direction.

Descriptors :   *COAL, *COMBUSTION CHAMBERS, *PATENTS, AERODYNAMIC FORCES, AERODYNAMICS, AIR, ASHES, BOTTOM, CHAMBERS, COMBUSTION, EXITS, FLOW, FUELS, LENGTH, LIQUIDS, PARTICLES, PATHS, SECONDARY, ULTRAFINES, WALLS, WATER, COMBUSTORS, CENTRIFUGAL FORCE, GRAVITY

Subject Categories : Combustion and Ignition
      Fuels
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE