skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Pilot-scale development of a low-NOX coal-fired tangential system. Final report Sep 78-Feb 81

Abstract

A 293 kWt (1 million Btu/hr) pilot-scale facility was used to develop a low-NOx pulverized-coal-fired tangential system. Conventional tangential system burner and vortex characterization tests defined the major system design requirements for a low-NOx system. Given these requirements, a burner concept was developed which achieves low NOx by directing the fuel and a fraction of the secondary combustion air into the center of the furnace, with the remaining secondary combustion air directed horizontally and parallel to the furnance walls. Such separation of secondary combustion air creates a fuel-rich zone in the center of the furnace where NOx production is minimized. This combustion modification technique has lowered NOx 64%, relative to conventional tangential firing, by injecting 85% of the secondary air along the furnace walls. Under these conditions, NO emissions were 180 ppm corrected to 0% 02. Also at these conditions, CO, UHC, and unburned carbon emissions were less than 40 ppm, 3 ppm, and 2.4%, respectively, comparable to conventional tangentially fired pilot-scale results. Also, the modification places a blanket of air on the furnace walls which reduces wall corrosion and slagging. With the modification, 02 concentrations above the burner level (near the furnace wall) were 12%, nearly three times conventionalmore » tangential pilot-scale system wall oxygen concentrations.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Acurex Corp., Mountain View, CA (USA). Energy and Environmental Div.
OSTI Identifier:
5863442
Report Number(s):
PB-81-242513
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; 20 FOSSIL-FUELED POWER PLANTS; BOILERS; AIR POLLUTION ABATEMENT; NITROGEN OXIDES; BURNERS; COAL; COMBUSTION PRODUCTS; DESIGN; FOSSIL-FUEL POWER PLANTS; FURNACES; INDUSTRIAL WASTES; PERFORMANCE; PILOT PLANTS; CARBONACEOUS MATERIALS; CHALCOGENIDES; ENERGY SOURCES; FOSSIL FUELS; FUELS; FUNCTIONAL MODELS; MATERIALS; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; POLLUTION ABATEMENT; POWER PLANTS; THERMAL POWER PLANTS; WASTES; 010900* - Coal, Lignite, & Peat- Environmental Aspects; 500200 - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989); 200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions

Citation Formats

Kelly, J T, Brown, R A, Chu, E K, Wightman, J B, and Pam, R L. Pilot-scale development of a low-NOX coal-fired tangential system. Final report Sep 78-Feb 81. United States: N. p., 1981. Web.
Kelly, J T, Brown, R A, Chu, E K, Wightman, J B, & Pam, R L. Pilot-scale development of a low-NOX coal-fired tangential system. Final report Sep 78-Feb 81. United States.
Kelly, J T, Brown, R A, Chu, E K, Wightman, J B, and Pam, R L. Sat . "Pilot-scale development of a low-NOX coal-fired tangential system. Final report Sep 78-Feb 81". United States.
@article{osti_5863442,
title = {Pilot-scale development of a low-NOX coal-fired tangential system. Final report Sep 78-Feb 81},
author = {Kelly, J T and Brown, R A and Chu, E K and Wightman, J B and Pam, R L},
abstractNote = {A 293 kWt (1 million Btu/hr) pilot-scale facility was used to develop a low-NOx pulverized-coal-fired tangential system. Conventional tangential system burner and vortex characterization tests defined the major system design requirements for a low-NOx system. Given these requirements, a burner concept was developed which achieves low NOx by directing the fuel and a fraction of the secondary combustion air into the center of the furnace, with the remaining secondary combustion air directed horizontally and parallel to the furnance walls. Such separation of secondary combustion air creates a fuel-rich zone in the center of the furnace where NOx production is minimized. This combustion modification technique has lowered NOx 64%, relative to conventional tangential firing, by injecting 85% of the secondary air along the furnace walls. Under these conditions, NO emissions were 180 ppm corrected to 0% 02. Also at these conditions, CO, UHC, and unburned carbon emissions were less than 40 ppm, 3 ppm, and 2.4%, respectively, comparable to conventional tangentially fired pilot-scale results. Also, the modification places a blanket of air on the furnace walls which reduces wall corrosion and slagging. With the modification, 02 concentrations above the burner level (near the furnace wall) were 12%, nearly three times conventional tangential pilot-scale system wall oxygen concentrations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {8}
}

Technical Report:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share: