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Title: Pulverized coal burner

Abstract

A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO.sub.x burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO.sub.x back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing.

Inventors:
 [1];  [2];  [3];  [4];  [2];  [2]
  1. (Alliance, OH)
  2. (Canton, OH)
  3. (Akron, OH)
  4. (Uniontown, OH)
Issue Date:
Research Org.:
BABCOCK & WILCOX CO
OSTI Identifier:
871944
Patent Number(s):
5829369
Assignee:
Babcock & Wilcox Company (New Orleans, LA) NETL
DOE Contract Number:  
AC22-92PC92160
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pulverized; coal; burner; emissions; unburned; fuel; losses; implementing; transition; zone; improved; transport; nozzle; surrounded; shields; central; oxygen-lean; devolatilization; swirling; secondary; combustion; air; buffer; primary; streams; improve; control; near-burner; mixing; flame; stability; providing; limited; recirculation; regions; evolved; towards; pyrolysis; reduction; molecular; nitrogen; alternate; embodiments; natural; gas; oil; firing; secondary combustion; molecular nitrogen; fuel oil; natural gas; air stream; pulverized coal; combustion air; secondary air; alternate embodiment; lean fuel; pyrolysis zone; pulverized fuel; transition zone; unburned fuel; alternate embodiments; coal burner; air streams; improved burner; devolatilization zone; /110/431/

Citation Formats

Sivy, Jennifer L., Rodgers, Larry W., Koslosy, John V., LaRue, Albert D., Kaufman, Keith C., and Sarv, Hamid. Pulverized coal burner. United States: N. p., 1998. Web.
Sivy, Jennifer L., Rodgers, Larry W., Koslosy, John V., LaRue, Albert D., Kaufman, Keith C., & Sarv, Hamid. Pulverized coal burner. United States.
Sivy, Jennifer L., Rodgers, Larry W., Koslosy, John V., LaRue, Albert D., Kaufman, Keith C., and Sarv, Hamid. Thu . "Pulverized coal burner". United States. https://www.osti.gov/servlets/purl/871944.
@article{osti_871944,
title = {Pulverized coal burner},
author = {Sivy, Jennifer L. and Rodgers, Larry W. and Koslosy, John V. and LaRue, Albert D. and Kaufman, Keith C. and Sarv, Hamid},
abstractNote = {A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO.sub.x burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO.sub.x back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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