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US 10,634,341 B2Granted
Overfire air system for low nitrogen oxide tangentially fired boiler
AssigneeGeneral Electric Technology GmbH
InventorsTodd D. Hellewell, Bryan Walter Mruk, Christopher David Siriani
Life of this patent
Estimating the term…
Abstract
The present application provides a tangentially fired boiler. The tangentially fired boiler may include a combustion chamber and an overfire air system positioned about the combustion chamber. The overfire air system may include a number of overfire air windboxes positioned in a horizontal orientation.
Claims19
A tangentially fired boiler, comprising:
- a combustion chamber defining a primary firing zone having first plurality of windboxes positioned thereabout, each of the first plurality of windboxes comprising a respective first plurality of compartments, each of the compartments of each windbox having vertical orientation with respect to each other;
- and
- an overfire air system positioned about the combustion chamber downstream of the primary firing zone;
- the overfire air system comprising a plurality of overfire air windboxes to inject separated overfire air into the combustion chamber, each overfire air windbox of the plurality of overfire air windboxes comprising a respective second plurality of compartments, wherein the compartments of each respective second plurality of compartments comprise a horizontal orientation with respect to each other.
1 more element
A method of operating a tangentially fired boiler, comprising:
- combusting a flow of fuel and a flow of air in a combustion chamber;
- circulating a fluid in a spiral configuration around the combustion chamber;
- and
- flowing overfire air into the combustion chamber via a plurality of overfire air windboxes wherein each overfire air windbox of the plurality of overfire air windboxes comprises a respective plurality of overtire air compartments horizontally arranged with respect to each other, and wherein the overfire air windboxes are positioned above the spiral configuration.
1 more element
A tangentially fired boiler, comprising:
- a combustion chamber;
- a plurality of tubes positioned in a spiral configuration about the combustion chamber;
- and
- an overfire air system positioned about the combustion chamber;
- the overfire air system comprising a plurality of overfire air windboxes to inject overfire air into the combustion chamber, each overfire air windbox of the plurality of overtire air windboxes comprising a respective plurality of compartments, wherein the compartments of each respective plurality of compartments comprise a horizontal orientation with respect to each other.
2 more elements
Dependencies are inferred from the claim text.