Pressurized wet combustion at increased temperature
First Claim
1. A method for continuously operating a gas turbine with a hot combustion gas generated by combusting an aqueous slurry of solid fuel particles so as to provide a clean, hot, pressurized fluid for driving the gas turbine comprising the steps of:
- pressurizing the fuel slurry;
pressurizing an oxygen-containing gas;
mixing the fuel slurry and the oxygen-containing gas in an inlet zone of an elongated combustion reactor;
permitting the fuel particles to burn in the presence of at least one atmosphere of steam while controlling the maximum temperature within a range of 1600 to 2600 degrees F. to thereby form a combustion gas which includes solid particles;
removing solid particles from the combustion gas, resulting in a clean gas-steam mixture and solid particles removed therefrom;
conducting the gas-steam mixture to the inlet of the gas turbine; and
driving the gas turbine with the gas-steam mixture.
2 Assignments
0 Petitions
Accused Products
Abstract
A pressurized combustion of slurries of low-cost, unbeneficiated solid fuels in the presence of steam and alkali in which sulfur oxide emissions are inherently low, emissions of nitrogen oxides controlled by the injection of a scavenging agent and emissions of particulates prevented by condensing steam on and around them. The combustion has applications to steam boilers, combined cycles and gas turbines, including steam injected (STIG) and intercooled steam injected (ISTIG) versions. Turbine blade and nozzle erosion and deposits are avoided by the effective wet separation of ash particles before reheating and expansion.
50 Citations
18 Claims
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1. A method for continuously operating a gas turbine with a hot combustion gas generated by combusting an aqueous slurry of solid fuel particles so as to provide a clean, hot, pressurized fluid for driving the gas turbine comprising the steps of:
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pressurizing the fuel slurry; pressurizing an oxygen-containing gas; mixing the fuel slurry and the oxygen-containing gas in an inlet zone of an elongated combustion reactor; permitting the fuel particles to burn in the presence of at least one atmosphere of steam while controlling the maximum temperature within a range of 1600 to 2600 degrees F. to thereby form a combustion gas which includes solid particles; removing solid particles from the combustion gas, resulting in a clean gas-steam mixture and solid particles removed therefrom; conducting the gas-steam mixture to the inlet of the gas turbine; and driving the gas turbine with the gas-steam mixture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of continuously operating a gas turbine with a hot combustion gas generated by combusting an aqueous slurry of solid fuel particles so as to provide a clean, hot, pressurized fluid for driving the gas turbine comprising the steps of:
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pressurizing the fuel slurry; pressurizing an oxygen-containing gas; mixing the fuel slurry and the oxygen-containing gas in an inlet zone of an elongated combustion reactor; permitting the fuel particles to burn in the presence of at least one atmosphere of steam while controlling the maximum temperature within a range of 1600 to 2600 degrees F. to thereby form a combustion gas including solid particles; extracting part of the combustion heat from the combustion gas at substantially combustion pressure and removing from the combustion gas solid particles resulting in a clean gas-steam mixture and solid particles removed therefrom; conducting the gas-steam mixture to the inlet of the gas turbine; and driving the gas turbine with the gas-steam mixture.
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18. A method for continuously operating a gas turbine with a hot combustion gas generated by combusting an aqueous fuel slurry of solid fuel particles so as to provide a clean, hot, pressurized fluid for driving the gas turbine comprising the steps of:
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adding alkali to the fuel slurry; pressurizing the fuel slurry; pressurizing an oxygen-containing gas; mixing the fuel slurry and the oxygen-containing gas in an inlet zone of an elongated combustion reactor; permitting the fuel particles to burn in the presence of at least one atmosphere of steam while controlling the maximum temperature within a range of 1600 to 2600 degrees F. to thereby form a combustion gas which includes solid particles; removing solid particles from the combustion gas, resulting in a clean gas-steam mixture and solid particles removed therefrom; conducting the gas-steam mixture to the inlet of the gas turbine; and driving the gas turbine with the gas-steam mixture.
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Specification