US2003157451A1PendingUtilityA1

Low NOx particulate fuel burner

37
Priority: Dec 13, 2001Filed: Dec 13, 2002Published: Aug 21, 2003
Est. expiryDec 13, 2021(expired)· nominal 20-yr term from priority
Inventors:Michael Mccabe
F23D 1/02F23D 2900/01001F23D 2900/14482
37
PatentIndex Score
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Claims

Abstract

A pulverized fuel burner having reduced NO x emissions comprises a first precessing jet nozzle surrounded by a second nozzle. The second nozzle feeds pulverized fuel into a precessing jet of air formed by the first nozzle.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A pulverized fuel burner, comprising: 
 a first nozzle that creates a precessing jet of air adjacent the nozzle exit; and    a second nozzle that conveys the pulverized fuel into the precessing jet of air for combustion.    
     
     
         2 . The burner of  claim 1 , wherein the first and second nozzles are concentric.  
     
     
         3 . The burner of  claim 2 , wherein the first nozzle is the inner nozzle and the second nozzle is the outer nozzle.  
     
     
         4 . The burner of  claim 1 , wherein the pulverized fuel is coal.

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