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US 4,116,005 AGranted
Combined cycle power plant with atmospheric fluidized bed combustor
AssigneeGeneral Electric Company
InventorDavid M. Willyoung
Life of this patent
Estimating the term…
Abstract
A combined cycle steam and gas power plant is disclosed in which energy for generating steam to drive a steam turbine and for heating air to drive a gas turbine is provided by combustion of a single carbonaceous sulfur-bearing fuel such as coal at nearly atmospheric pressure in a sulfur-sorbing fluidized bed combustor. Fluidizing and combustion air for the combustor is furnished by exhaust from the gas turbine, and an air heat exchanger within the combustor allows indirect heating of air for driving the gas turbine so that corrosion of gas turbine hardware by the products of combustion is avoided.
Claims9
A combined cycle steam turbine and gas turbine power plant comprising:
- (a) a gas turbine including a compressor section and a turbine section;
- (b) a fluidized bed combustor for combustion of carbonaceous sulfur-bearing fuel at nearly atmospheric pressure and in an environmentally clean manner, said combustor having a bed of fluidizable sulfur-sorbing particles, a first inlet for receiving fluidizing and combustion air at nearly atmospheric pressure from the turbine section of said gas turbine, a second inlet for receiving carbonaceous sulfur-bearing fuel, a third inlet for receiving sulfur-sorbing particles, a first outlet for discharge of gaseous and entrained solid particulate products, and a second outlet for discharge of spent sorbing particles and ash solids;
- (c) an air heat exchanger within said fluidized bed combustor, said heat exchanger including an inlet for receiving pressurized air from the compressor section of said gas turbine, heat exchange surface means allowing heating of the compressed air without intermixing of air heat exchanger air and fluidized bed combustor material, and an outlet to direct heated pressurized air out of the fluidized bed combustor for passage to the turbine section of said gas turbine;
- (d) a steam turbine;
- and
- (e) steam generating means in said fluidized bed combustor for furnishing steam to drive said steam turbine.
3 more elements
A combined cycle steam turbine and gas turbine power plant comprising:
- (a) a gas turbine including a compressor section and a turbine section;
- (b) a first fluidized bed combustor for combustion of carbonaceous sulfur-bearing fuel at nearly atmospheric pressure and in an environmentally clean manner, said combustor having a bed of fluidizable sulfur-sorbing particles, a first inlet for receiving fluidizing and combustion air at nearly atmospheric pressure from the turbine section of said gas turbine, a second inlet for receiving carbonaceous sulfur-bearing fuel, a third inlet for receiving sulfur-sorbing particles, a first outlet for discharge of gaseous and entrained solid particulate products, and a second outlet for discharge of spent sorbing particles and ash solids;
- (c) an air heat exchanger within said first fluidized bed combustor, said heat exchanger including an inlet for receiving pressurized air from the compressor section of said gas turbine, heat exchange surface means allowing heating of the compressed air without intermixing of air heat exchanger air and fluidized bed combustor material, and an outlet to direct heated pressurized air out of said first fluidized bed combustor for passage to the turbine section of said gas turbine;
- (d) a second fluidized bed combustor for combustion of carbonaceous sulfur-bearing fuel at nearly atmospheric pressure and in an environmentally clean manner, said combustor having a bed of fluidizable sulfur-sorbing particles, a first inlet for receiving fluidizing and combustion air at nearly atmospheric pressure from the turbine section of said gas turbine, a second inlet for receiving carbonaceous sulfur-bearing fuel, a third inlet for receiving sulfur-sorbing particles, a fourth inlet for receiving gaseous and entrained solid particulate products of said first fluidized bed combustor, a first outlet for discharge of gaseous and entrained solid particulate products, and a second outlet for discharge of spent sorbing particles and ash solids;
- (e) a steam turbine;
- and
- (f) steam generating means in said second fluidized bed combustor for furnishing steam to drive said steam turbine.
4 more elements
Dependencies are inferred from the claim text.