PULVERIZED FUEL-OXYGEN BURNER

摘要

A burner assembly combines oxygen and fuel to produce a flame. The burner assembly includes an oxygen supply tube adapted to receive a stream of oxygen and a solid fuel conduit arranged to extend through the oxygen tube to convey a stream of fluidized, pulverized, solid fuel into a flame chamber. Oxygen flowing through the oxygen supply tube passes generally tangentially through a first set of oxygen-injection holes formed in the solid fuel conduit and off-tangentially from a second set of oxygen-injection holes formed in the solid fuel conduit and then mixes with fluidized, pulverized, solid fuel passing through the solid fuel conduit to create an oxygen-fuel mixture in a downstream portion of the solid fuel conduit. This mixture is discharged into a flame chamber and ignited in the flame chamber to produce a flame.

主权项

1. A burner assembly (14) for combining fuel and oxygen to produce a combustible fuel-oxygen mixture, the burner assembly comprising:
a solid fuel conduit (28) having a longitudinal axis, said solid fuel conduit formed to include a fuel transport passage (30) for transporting fluidized, pulverized solid fuel, said solid fuel conduit defining an inlet opening for receiving the fluidized, pulverized solid fuel, said inlet opening having a cross-sectional area; said solid fuel conduit further defining a fuel-oxygen nozzle (12), said fuel-oxygen nozzle having a side wall and said fuel-oxygen nozzle formed to include a fuel-oxygen transport passage, a fuel inlet opening located to admit the fluidized, pulverized solid fuel from the fuel transport passage into the fuel-oxygen transport passage, and a fuel-oxygen outlet opening located to discharge a fuel-oxygen mixture into a flame chamber (200); a primary oxygen conduit (60) located about said fuel-oxygen nozzle, said primary oxygen conduit formed to include a primary oxygen inlet and a primary oxygen passage; a first plurality of oxygen injection nozzles (52) located in said side wall of said fuel-oxygen nozzle and configured to admit oxygen from said primary oxygen passage into said fuel-oxygen nozzle in a direction substantially orthogonal to said longitudinal axis to mix with the fluidized, pulverized solid fuel in the fuel-oxygen transport passage and to establish a combustible fuel-oxygen mixture flowing in the fuel-oxygen transport passage and exiting through the fuel-oxygen outlet opening.