Combustion Engineering, Inc.

The United States of America As Represented by the United States

Alstom Technology Limited

General Electric Technology Gmbh

David P Towle

Todd D Hellewell

Michael J Rini

Robert D Lewis

Srivats Srinivasachar

David K Anderson

Majed A Toqan

Richard C LaFlesh

Milton A Fong

Richard E Donais

Galen H Richards

Charles Q Maney

Patrick L Jennings

A nozzle tip [] for a pulverized solid fuel pipe nozzle [] of a pulverized solid fuel-fired furnace includes: a primary air shroud [] having an inlet [] and an outlet [], wherein the inlet [] receives a fuel flow []; and a flow splitter [] disposed within the primary air shroud [], wherein the flow splitter disperses particles in the fuel flow [] to the outlet [] to provide a fuel flow jet which reduces NOx in the pulverized solid fuel-fired furnace. In alternative embodiments, the flow splitter [] may be wedge shaped and extend partially or entirely across the outlet []. In another alternative embodiment, flow splitter [] may be moved forward toward the inlet [] to create a recessed design.

Low NOx nozzle tip for a pulverized solid fuel furnace

A minimum recirculation flame control (MRFC) solid fuel nozzle tip (12) that is suited to being cooperatively associated with a pulverized solid fuel nozzle (34) of a firing system in a pulverized solid fuel-fired furnace (10). The MRFC solid fuel nozzle tip (12) includes a secondary air shroud (46), secondary air shroud support (50) operative for supporting the primary air shroud (48) relative to the secondary air shroud (46), and a splitter plate (52) mounted in supported relation within the primary air shroud (48).

Minimum recirculation flame control (MRFC) pulverized solid fuel nozzle

An integrated low NO.sub.x tangential firing system (12) that is particularly suited for use with pulverized solid fuel-fired furnaces (10), and a method of operating a pulverized solid fuel-fired furnace (10) equipped with an integrated low NO.sub.x tangential firing system (12). The integrated low NO.sub.x tangential firing system (12) when so employed with a pulverized solid fuel-fired furnace (10) is capable of limiting NO.sub.x emissions therefrom to less than 0.15 lb./10.sup. 6 BTU, while yet maintaining carbon-in-flyash to less than 5% and CO emissions to less than 50 ppm. The integrated low NO.sub.x tangential firing system (12) includes pulverized solid fuel supply means (62), flame attachment pulverized solid fuel nozzle tips (60), concentric firing nozzles, close-coupled overfire air (98,100), and multi-staged separate overfire air (104,106).

Integrated low NO.sub.x tangential firing system

A pulverized coal fuel injector contains an acceleration section to improve the uniformity of a coal-air mixture to be burned. An integral splitter is provided which divides the coal-air mixture into a number separate streams or jets, and a center body directs the streams at a controlled angle into the primary zone of a burner. The injector provides for flame shaping and the control of NO/NO.sub.2 formation.

Pulverized coal fuel injector

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Simsbury, CT, United States of America

David P Towle