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:
-
- Alliance, OH
- Canton, OH
- Akron, OH
- Uniontown, OH
- Issue Date:
- Research Org.:
- BABCOCK & WILCOX CO
- OSTI Identifier:
- 871944
- Patent Number(s):
- 5829369
- Assignee:
- Babcock & Wilcox Company (New Orleans, LA)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23C - METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23D - BURNERS
- 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 = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}