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Title: Pulverized coal burner

Abstract

A burner is described 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. 8 figs.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
Babcock and Wilcox Co
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
675795
Patent Number(s):
US 5,829,369/A/
Application Number:
PAN: 8-747,319
Assignee:
Babcock and Wilcox Co., New Orleans, LA (United States) PTO; SCA: 014000; 025000; 034000; PA: EDB-99:000172; SN: 98002027973
DOE Contract Number:  
AC22-92PC92160
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 3 Nov 1998
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 02 PETROLEUM; 03 NATURAL GAS; PULVERIZED FUELS; COAL; BURNERS; DESIGN; AIR POLLUTION ABATEMENT; NITROGEN OXIDES; STAGED COMBUSTION; REDUCTION; NATURAL GAS; FUEL OILS

Citation Formats

Sivy, J.L., Rodgers, L.W., Koslosy, J.V., LaRue, A.D., Kaufman, K.C., and Sarv, H. Pulverized coal burner. United States: N. p., 1998. Web.
Sivy, J.L., Rodgers, L.W., Koslosy, J.V., LaRue, A.D., Kaufman, K.C., & Sarv, H. Pulverized coal burner. United States.
Sivy, J.L., Rodgers, L.W., Koslosy, J.V., LaRue, A.D., Kaufman, K.C., and Sarv, H. Tue . "Pulverized coal burner". United States.
@article{osti_675795,
title = {Pulverized coal burner},
author = {Sivy, J.L. and Rodgers, L.W. and Koslosy, J.V. and LaRue, A.D. and Kaufman, K.C. and Sarv, H.},
abstractNote = {A burner is described 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. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {11}
}