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Title: Apparatus and method for burning a lean, premixed fuel/air mixture with low NOx emission

An apparatus for enabling a burner to stably burn a lean fuel/air mixture. The burner directs the lean fuel/air mixture in a stream. The apparatus comprises an annular flame stabilizer; and a device for mounting the flame stabilizer in the fuel/air mixture stream. The burner may include a body having an internal bore, in which case, the annular flame stabilizer is shaped to conform to the cross-sectional shape of the bore, is spaced from the bore by a distance greater than about 0.5 mm, and the mounting device mounts the flame stabilizer in the bore. An apparatus for burning a gaseous fuel with low NOx emissions comprises a device for premixing air with the fuel to provide a lean fuel/air mixture; a nozzle having an internal bore through which the lean fuel/air mixture passes in a stream; and a flame stabilizer mounted in the stream of the lean fuel/air mixture. The flame stabilizer may be mounted in the internal bore, in which case, it is shaped and is spaced from the bore as just described. In a method of burning a lean fuel/air mixture, a lean fuel/air mixture is provided, and is directed in a stream; an annular eddy ismore » created in the stream of the lean fuel/air mixture; and the lean fuel/air mixture is ignited at the eddy.« less
 [1];  [2]
  1. (Edmonton, CA)
  2. (Kensington, CA)
Issue Date:
OSTI Identifier:
Regents, University of California (Berkeley, CA) LBNL
Patent Number(s):
US 5516280
Research Org:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Country of Publication:
United States
apparatus; method; burning; lean; premixed; fuel; air; mixture; nox; emission; enabling; burner; stably; burn; directs; stream; comprises; annular; flame; stabilizer; device; mounting; internal; bore; shaped; conform; cross-sectional; shape; spaced; distance; mounts; gaseous; emissions; premixing; provide; nozzle; passes; mounted; described; provided; directed; eddy; created; ignited; gaseous fuel; mounting device; internal bore; apparatus comprises; air mixture; flame stabilizer; lean fuel; cross-sectional shape; apparatus comprise; mixed fuel; nox emission; premixed fuel; /431/239/