Fuel lance for liquid and/or gaseous fuels and method for operation thereof
First Claim
1. A fuel lance for liquid and/or gaseous fuels for use in a combustion chamber, which fuel lance comprises:
- (a) a liquid fuel pipe extending along a lance center line and surrounding a liquid fuel passage for carrying a liquid fuel;
(b) a gas pipe surrounding the liquid fuel pipe and forming therebetween a gas passage for carrying a gaseous fuel;
(c) a lance outer shell surrounding the gas pipe and forming an air passage around the gas pipe for carrying cooling air and atomizer air;
(d) at least one air/fuel nozzle provided in a side of the lance outer shell at a downstream end of the fuel lance for air flow out of the air passage into the combustion chamber surrounding the fuel lance;
(e) at least one gas nozzle provided in the gas pipe for gas flow out of the gas passage into the air passage, wherein the at least one gas nozzle is positioned relative to the at least one air/fuel nozzle so that gas from the gas nozzle flows with air from the air passage through the at least one air/fuel nozzle into the combustion chamber; and
(f) at least one liquid fuel nozzle provided in the liquid fuel pipe for liquid fuel flow out of the liquid fuel passage the at least one liquid fuel nozzle being positioned relative to the at least one gas nozzle and at least one air/fuel nozzle so that liquid fuel from the liquid fuel nozzle flows through the air passage and, with the air, through the at least one air/fuel nozzle into the combustion chamber.
3 Assignments
0 Petitions
Accused Products
Abstract
A fuel lance for liquid and/or gaseous fuels for use in a combustion chamber includes a liquid fuel pipe extending along a lance center line and defining a liquid fuel passage, a gas pipe surrounding the liquid fuel pipe and forming therebetween a gas passage, and a lance outer shell surrounding the gas pipe and forming an air passage around the gas pipe for cooling air and atomizer air. At least one air/fuel nozzle is provided in a peripheral side of the lance outer shell at a downstream end of the fuel lance for air flow out of the air passage into the combustion chamber. At least one gas nozzle is provided in the gas pipe for gas flow out of the gas passage into the air passage, the gas nozzle is positioned relative to the air/fuel nozzle so that gas from the gas nozzle flows with air from the air passage through the at least one air/fuel nozzle into the combustion chamber. At least one liquid fuel nozzle is provided in the liquid fuel pipe for liquid fuel flow out of the liquid fuel passage, the liquid fuel nozzle being positioned relative to the gas nozzle and air/fuel nozzle so that liquid fuel from the liquid fuel nozzle flows through the air passage and, with the air, through the air/fuel nozzle into the combustion chamber.
47 Citations
20 Claims
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1. A fuel lance for liquid and/or gaseous fuels for use in a combustion chamber, which fuel lance comprises:
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(a) a liquid fuel pipe extending along a lance center line and surrounding a liquid fuel passage for carrying a liquid fuel; (b) a gas pipe surrounding the liquid fuel pipe and forming therebetween a gas passage for carrying a gaseous fuel; (c) a lance outer shell surrounding the gas pipe and forming an air passage around the gas pipe for carrying cooling air and atomizer air; (d) at least one air/fuel nozzle provided in a side of the lance outer shell at a downstream end of the fuel lance for air flow out of the air passage into the combustion chamber surrounding the fuel lance; (e) at least one gas nozzle provided in the gas pipe for gas flow out of the gas passage into the air passage, wherein the at least one gas nozzle is positioned relative to the at least one air/fuel nozzle so that gas from the gas nozzle flows with air from the air passage through the at least one air/fuel nozzle into the combustion chamber; and (f) at least one liquid fuel nozzle provided in the liquid fuel pipe for liquid fuel flow out of the liquid fuel passage the at least one liquid fuel nozzle being positioned relative to the at least one gas nozzle and at least one air/fuel nozzle so that liquid fuel from the liquid fuel nozzle flows through the air passage and, with the air, through the at least one air/fuel nozzle into the combustion chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of operating a fuel lance, including a liquid fuel pipe extending along a lance center line and defining a liquid fuel passage and having at least one liquid fuel nozzle for liquid fuel flow out of the liquid fuel passage, a gas pipe surrounding the liquid fuel pipe and forming therebetween a gas passage and having at least one gas nozzle for gas flow out of the gas passage into the air passage, and a lance outer shell Surrounding the gas pipe and forming an air passage around the gas pipe for cooling air and atomizer air and having at least one air/fuel nozzle in a peripheral side of the lance outer shell at a downstream end of the fuel lance for air flow out of the air passage into the combustion chamber, wherein the gas nozzle is positioned relative to the air/fuel nozzle so that gas from the gas nozzle flows with air from the air passage through the at least one air/fuel nozzle into the combustion chamber and the liquid fuel nozzle is positioned relative to the gas nozzle and air/fuel nozzle so that liquid fuel from the liquid fuel nozzle flows through the air passage and with the air, through the air/fuel nozzle into the combustion chamber the method comprising the steps of:
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directing air through the air passage to the air/fuel nozzle to cool the fuel lance and distribute fuel and wherein the air is blown through the air/fuel nozzle into the combustion chamber as a flow jacketing the fuel flow. - View Dependent Claims (17, 18, 19, 20)
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Specification