Gas: heating and illuminating – Generators – Cupola
Patent
1995-03-17
1998-06-30
Bhat, Nina
Gas: heating and illuminating
Generators
Cupola
48 77, 48 63, 48 64, 48 86R, 48 86A, 48202, 48206, 48DIG4, 431170, C10J 368
Patent
active
057727082
ABSTRACT:
A system for feeding a coal-water paste material coaxially upwardly through a feed nozzle assembly into a pressurized fluidized bed reactor having a lower portion and a larger diameter upper portion. The feed nozzle assembly includes a nozzle unit for atomizing the coal paste feed material, and a concentric outer shroud tube enclosing the nozzle unit. The feed nozzle assembly is inserted upwardly through an opening in the bottom portion of the pressurized fluidized bed reactor into a coaxial orientation with the bed, so as to provide substantially complete combustion and/or carbonization of the coal paste material fed into the reactor to produce a combustible gas product. If desired, a sorbent material nay be fed into the fluidized bed together with the coal paste feed, so as to absorb sulfur from the coal and produce a clean fuel gas. During reactor operations at 130-200 psig pressure and 1,600.degree.-1,800.degree. F. temperature, at hot zone is advantageously formed just above the nozzle assembly exit end which produces rapid dehydration and passivation prior to combustion of the coal with minimal agglomeration to produce a fuel gas product.
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Bhat Nina
Foster Wheeler Development Corp.
Smolowitz Martin
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