초록 ▼

Method of preparing and introducing fuel into the combustors of a gas turbine in which a hydrocarbon containing feed, oxygen and steam are introduced into a catalytic partial oxidation reactor to produce a product stream. The hydrocarbon containing feed contains no less than about 15 percent by volu

Method of preparing and introducing fuel into the combustors of a gas turbine in which a hydrocarbon containing feed, oxygen and steam are introduced into a catalytic partial oxidation reactor to produce a product stream. The hydrocarbon containing feed contains no less than about 15 percent by volume on a dry basis of hydrocarbons with at least two carbon atoms and/or at least about 3 percent by volume of olefins. The reactant mixture formed of the hydrocarbon containing feed, oxygen and steam has an oxygen to carbon ratio of between about 0.08 and about 0.25 and a water to carbon ratio of between about 0.05 to about 0.5. The hydrocarbon containing feed is introduced into the reactor alone or with a steam at a temperature no greater than 600�� C. and the product stream is produced at a temperature of between about 600�� C. and 860�� C. and contains less than about 0.5 percent of olefins and less than 10 percent of hydrocarbons with two or more carbon atoms on a dry basis. After cooling the product stream the product stream is introduced into the combustors of the gas turbine to form part or all of the fuel required to support combustion.

대표청구항 ▼

We claim: 1. A method of preparing and introducing fuel into combustors of a gas turbine, said method comprising: introducing, into a catalytic partial oxidation reactor, a hydrocarbon containing feed stream comprising no less than about 15 percent by volume on a dry basis of hydrocarbons with at l

We claim: 1. A method of preparing and introducing fuel into combustors of a gas turbine, said method comprising: introducing, into a catalytic partial oxidation reactor, a hydrocarbon containing feed stream comprising no less than about 15 percent by volume on a dry basis of hydrocarbons with at least two carbon atoms and/or at least about 3 percent by volume of olefins along with an oxygen containing stream and a steam stream so that a reactant mixture is obtained within the catalytic partial oxidation reactor, prior to contact with catalyst, having an oxygen to carbon ratio between about 0.08 and about 0.25 and a water to carbon ratio of between about 0.05 and about 0.5; the hydrocarbon containing feed stream being introduced into the catalytic reactor alone or in combination with the steam stream at a temperature of no greater than about 600�� C.; reacting said reactant mixture within the catalytic partial oxidation reactor so that a product stream is produced at a temperature of between about 600�� C. and about 860�� C., the product stream having a hydrocarbon content consisting of methane, less than about 0.5 percent of olefins by volume on a dry basis, less than about 10 percent of alkanes with two or more carbon atoms on a dry basis and less than about 1 percent by volume on a dry basis of hydrocarbons other than methane, alkanes and olefins and a remaining content comprising hydrogen, carbon monoxide, carbon dioxide and water vapor; cooling the product stream; and introducing the product stream into the combustors so that the product stream constitutes at least part of the fuel required to support combustion within the combustors. 2. The method of claim 1, wherein said hydrocarbon containing feed stream is an FCC offgas, a coker offgas, sweet refinery gas, or coke oven gas. 3. The method of claim 1, wherein a fuel stream is formed by combining the product stream, as a first fuel stream, with a second fuel stream, thereby to at least in part cool the product stream by direct heat exchange. 4. The method of claim 3, further comprising: combining the hydrocarbon containing feed stream with the steam stream to form a combined stream; introducing the combined stream into the catalytic partial oxidation reactor; and indirectly transferring heat from the product stream to the combined stream, thereby to preheat the combined stream and to at least in part cool the product stream. 5. The method of claim 3, further comprising: compressing an air stream to form the oxygen containing stream; pumping a makeup water stream to form a pressurized water stream; and quenching the product stream with the pressurized water stream. 6. The method of claim 3, further comprising producing the steam stream by pumping a makeup water stream to form a pressurized water stream and indirectly transferring heat from the product stream to the pressurized water stream within a heat exchanger, thereby to cool the product stream and to form the steam stream. 7. The method of claim 6, further comprising forming the oxygen containing stream by compressing an air stream to form a compressed air stream and indirectly transferring heat from the product stream to the compressed air stream, thereby preheating the compressed air stream and also cooling the product stream. 8. The method of claim 6, wherein the air stream is a bleed air stream from a compressor section of the gas turbine. 9. The method of claim 3, wherein the second fuel stream is natural gas. 10. The method of claim 1 or claim 2, wherein said combustors are lean premix combustors. 11. The method of claim 10, wherein each of said combustor has a primary mixing zone for mixing a fuel and compressor air to obtain a combustible mixture, a downstream secondary combustion zone for combusting the combustible mixture, primary fuel nozzles for feeding a primary fuel stream, constituting part of the fuel, to the primary mixing zone and a secondary fuel nozzle for introducing a secondary fuel stream, constituting a remaining part of the fuel, into the secondary combustion zone and downstream of the primary fuel nozzles to stabilize combustion. 12. The method of claim 11, wherein: the product stream contains at least about 10 percent by volume hydrogen; and the secondary fuel stream introduced by the secondary fuel nozzle constitutes the product stream. 13. The method of claim 12, wherein the product stream is cooled by: pumping a makeup water stream to form a pressurized water stream; quenching the product stream with the pressurized water stream; and indirectly transferring heat from the product stream to the second fuel stream. 14. The method of claim 13, wherein the primary fuel stream is natural gas.