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Babcock & Wilcox Power Generation Group, Inc.

The Babcock & Wilcox Company

Alan N Sayre

Albert D LaRue

Hamid Sarv

Daniel R Rowley

William J Kahle

Albert D Larue

Sarv Hamid

A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.

Large diameter mid-zone air separation cone for expanding IRZ

A new burner apparatus and method of combusting fossils fuels for commercial and industrial application is provided wherein the new burner apparatus achieves low NOemissions by supplying oxygen to the center of the burner flame in as manners so as to create a fuel rich internal combustion zone within the burner flame.

Burner with center air jet

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North Canton, OH, United States of America

Alan N Sayre