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Title: RI-JET burner for reducing NOx emissions in tangentially fired boilers

Abstract

A new type of low-NO{sub x} burner has been developed for NO{sub x} reduction of tangentially fired boilers. The basic idea of the RI-JET (Rapid Ignition) low-NO{sub x} burner is to create a high-temperature reducing flame near the burner tip. In order to promote rapid ignition and to form a reducing zone near the burner, the RI-JET burner is equipped with a flame stabilizer in the coal nozzle, an axial swirler in the secondary air nozzle and a guide sleeve between the secondary and tertiary air nozzles. By now, this new low-NO{sub x} combustion technology has been applied in two power stations, where the NO{sub x} reductions achieved by RI-JET burners and an over-fire air system varied between 50 and 75% and, at the same time, unburned carbon was below 5%. The flame was stable over the normal load range 50-100%, and the flame stability was independent of the burner zone stoichiometric ratio. Low NO{sub x} and UBC values were therefore achieved also when operating the boiler at low load.

Authors:
;
Publication Date:
Research Org.:
Electric Power Research Inst., Palo Alto, CA (United States)
OSTI Identifier:
269431
Report Number(s):
EPRI-TR-105978-V1; CONF-9505150-Vol.1
TRN: 96:003477-0008
Resource Type:
Technical Report
Resource Relation:
Conference: EPRI/EPA joint symposium on stationary combustion NO/sub x/ control, Kansas City, MO (United States), 16-19 May 1995; Other Information: PBD: Jan 1996; Related Information: Is Part Of Proceedings: EPRI/EPA 1995 joint symposium on stationary combustion NO{sub x} control: Volume 1, Tuesday, May 16, 1995, Sessions 1, 2, 3; PB: 148 p.
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 20 FOSSIL-FUELED POWER PLANTS; FOSSIL-FUEL POWER PLANTS; BURNERS; PERFORMANCE; NITROGEN OXIDES; AIR POLLUTION CONTROL; BOILERS; EMISSION; COAL; COMBUSTION

Citation Formats

Savolainen, K, and Dernjatin, P. RI-JET burner for reducing NOx emissions in tangentially fired boilers. United States: N. p., 1996. Web.
Savolainen, K, & Dernjatin, P. RI-JET burner for reducing NOx emissions in tangentially fired boilers. United States.
Savolainen, K, and Dernjatin, P. Mon . "RI-JET burner for reducing NOx emissions in tangentially fired boilers". United States.
@article{osti_269431,
title = {RI-JET burner for reducing NOx emissions in tangentially fired boilers},
author = {Savolainen, K and Dernjatin, P},
abstractNote = {A new type of low-NO{sub x} burner has been developed for NO{sub x} reduction of tangentially fired boilers. The basic idea of the RI-JET (Rapid Ignition) low-NO{sub x} burner is to create a high-temperature reducing flame near the burner tip. In order to promote rapid ignition and to form a reducing zone near the burner, the RI-JET burner is equipped with a flame stabilizer in the coal nozzle, an axial swirler in the secondary air nozzle and a guide sleeve between the secondary and tertiary air nozzles. By now, this new low-NO{sub x} combustion technology has been applied in two power stations, where the NO{sub x} reductions achieved by RI-JET burners and an over-fire air system varied between 50 and 75% and, at the same time, unburned carbon was below 5%. The flame was stable over the normal load range 50-100%, and the flame stability was independent of the burner zone stoichiometric ratio. Low NO{sub x} and UBC values were therefore achieved also when operating the boiler at low load.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}

Technical Report:
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