Burner for solid and other high ash fuels

Details Burner for solid and other high ash fuels Burner for solid and other high ash fuels

1988-12-20

1989-09-26

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Using special fuel or oxidizer

60750, 110264, F02C 326

Patent

active

048690627

ABSTRACT:
A novel combustion device is installed into a gas turbine to permit operation with solid or other high ash fuels. A refractory burner block defines an annular primary combustion chamber and a number of secondary cyclonic combustion chambers positioned radially inwardly of the primary chamber. Waste wood or other solid fuels are charged into the primary combustion chamber. Pressurized combustion air flows derived from the turbine's compressor are introduced tangentially into the primary chamber thereby creating a vortex. A number of passages place the primary chamber in communication with the secondary chambers. These passages are formed in a radially inner wall of the primary chamber so that fuel particles are retained within the primary chamber by centrifugal forces until reduced to an appropriate size for combustion in the secondary chambers. The primary chamber exhaust flows and additional combustion air are introduced tangentially into each secondary chamber adjacent to a short exhaust tube leading to the turbine's runner thereby creating a vortex in each secondary chamber. Ash produced in each secondary chamber travels under the influence of the vortex along an inner chamber wall in a direction opposite to combustion gas flows through the exhaust tube and escapes radially through an opening distant from the exhaust tube.

REFERENCES:
patent: 2707444 (1955-05-01), Van Loon
patent: 2808012 (1957-10-01), Schindler
patent: 3658482 (1972-04-01), Evans et al.
patent: 4144019 (1979-03-01), Lyshkow et al.
patent: 4338782 (1982-07-01), Marchand
patent: 4702073 (1987-10-01), Melconian

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