Fluidized bed combustion
AssigneeSargas AS
InventorTor Christensen
Life of this patent
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Abstract
A method and a power plant for combustion of carbonaceous fuel for production of electrical power are described. The plant is a pressurized fluidized bed combustion plant wherein the compressor(s) (5, 5 . . . ) for compression of the air for the combustion is (are) arranged on shafts being separate from the shafts for the expander(s) (29) for expanding the combustion gas.
Claims9
A power plant for combustion of carbonaceous fuel for production of electrical power, comprising:
- a compressor unit comprising one or more compressors for compression of air;
- a combustion chamber;
- fuel line(s) for injecting fuel into the combustion chamber;
- wherein an air line is provided for introducing compressed air from the compressor unit into the combustion chamber to provide a pressurized fluidized bed for combustion of fuel and air;
- wherein a combustion gas line is provided to lead combustion gas from the combustion chamber to an expander unit, the expander unit comprising one or more expanders for expanding exhaust gas before being released to the surroundings;
- wherein the expander unit is connected to one or more generator(s) for generation of electrical power;
- and
- wherein the compressor(s) for compression of the air are arranged on shafts that are separate from the shafts for the expander(s) for expanding the combustion gas.
A method for operating a pressurized fluidized bed combustion plant, where air is compressed in a compression unit, the compressed air is introduced into a pressurized fluidized bed combustion chamber where carbonaceous fuel is combusted in presence of the air, where the temperature in the combustion chamber is kept between 750° and 1000° C. by generation of steam and superheated steam in heat coils in the combustion chamber, and where the combustion gas from the combustion chamber is expanded over an expander connected to a generator to generate electrical power, wherein the compressor is operated by a motor being separate from the expander.
Dependencies are inferred from the claim text.