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US 2021/0356122 A1Published application
Plug-resistant burner tip and method
AssigneeZeeco, Inc.
InventorsDarton J. Zink, Rex K. Isaacs, John Petersen, Tim Kirk, Austin White
Life of this patent
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Abstract
A burner tip apparatus which is resistant to plugging, and a staged air method of operation which reduces the peak temperature of the flame of the burner tip to provide low levels of NOx and other emissions. The burner tip can be used as an auxiliary burner tip for stabilizing a main burner flame, or for other purposes.
Claims21
A burner tip apparatus comprising:
- a shield housing having a mixing chamber therein and a longitudinally extending outer wall which surrounds the mixing chamber;
- a gas fuel spud having a fuel port positioned to discharge a gas fuel into a rearward longitudinal end of the mixing chamber;
- a lateral base wall of the shield housing at a rearward longitudinal end of the mixing chamber, the lateral base wall having a central opening provided therethrough;
- a lateral flame stabilization ring of the shield housing at a forward longitudinal end of the mixing chamber, the flame stabilization ring having a discharge opening for the mixing chamber provided therethrough;
- and
- a flame diverter on a forward longitudinal end of the shield housing.
3 more elements
A method of operating a burner tip apparatus comprising the steps of:
- a) discharging a gas fuel into a rearward longitudinal end of a mixing chamber of the burner tip apparatus, the mixing chamber having a lateral base wall at the rearward longitudinal end of the mixing chamber and the lateral base wall having at least a central opening formed therethrough;
- b) using a flow momentum of the gas fuel discharged in step (a) to draw a sub-stoichiometric amount of air, or other oxygen-containing gas, through at least the central opening of the lateral base wall to form a sub-stoichiometric, fuel rich mixture of the air, or other oxygen-containing gas, and the gas fuel in the mixing chamber;
- c) discharging the sub-stoichiometric mixture of the air, or other oxygen-containing gas, and the gas fuel through a stabilization ring at a forward longitudinal end of the mixing chamber to form a reduced pressure area outside of the forward longitudinal end of the mixing chamber which stabilizes a flame of the burner tip apparatus, the flame having an initial sub-stoichiometric combustion region in which a first portion of the gas fuel of the sub-stoichiometric mixture of the air, or other oxygen-containing gas, and the gas fuel is burned;
- and
- d) diverting the flame laterally outward into a stream or body of air or other oxygen-containing gas to form a fuel lean combustion region in which a remaining portion of the gas fuel is combusted.
2 more elements
Dependencies are inferred from the claim text.