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Title: Firing system modification to alter ash properties for reduction of deposition and slagging under low NOx firing conditions

Abstract

The composition and properties of ash formed during coal firing have a major impact on boiler performance. Higher ash content in the coal can mean higher costs associated with coal handling, transportation, ash removal and ash disposal along with higher costs due to the increased ash content's deleterious effects on pulverizing, combustion and heat transfer. ABB C-E Services, Inc. has conducted research what might be done to minimize the adverse effects of ash on boiler performance for many years. Recently, ABB C-E Services has studied the effects of firing system modifications on ash composition and properties and the effect these firing system modifications have on overall furnace performance. The subject of this paper is the impact of the installation of the CFS{trademark} yaw angles were varied and particle samples were collected at the waterwalls for the different yaw angles tested. These ash samples were analyzed for ash composition. The results showed that with a larger CFS{trademark} yaw angle (the air stream directed more towards the boiler walls) the base/acid ratio, iron content and sulfur content of the particle samples collected at the waterwall were reduced. This effect is due to several contributing factors: (1) an oxidizing environment produced by injectingmore » more air toward the walls; and (2) an aerodynamic change which impacts the particle combustion time/temperature history.« less

Authors:
; ; ;
Publication Date:
Research Org.:
ABB C-E Services, Inc., Windsor, CT (US)
OSTI Identifier:
20013517
Resource Type:
Conference
Resource Relation:
Conference: 1998 International Joint Power Generation Conference, Baltimore, MD (US), 08/23/1998--08/26/1998; Other Information: PBD: 1998; Related Information: In: Proceedings of the 1998 international joint power generation conference (FACT-Vol.22). Volume 1: Fuels and combustion technologies; Gas turbines; Environmental engineering; Nuclear engineering, by Gupta, A.; Natole, R.; Sanyal, A.; Veilleux, J. [eds.], 921 pages.
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 01 COAL, LIGNITE, AND PEAT; IGNITION SYSTEMS; POSITIONING; ASHES; CHEMICAL COMPOSITION; FOULING; MITIGATION; BURNERS; NITROGEN OXIDES; AIR POLLUTION ABATEMENT; COAL; FOSSIL-FUEL POWER PLANTS

Citation Formats

Hart, D., Lewis, R., Tobiasz, R., and Chen, W.. Firing system modification to alter ash properties for reduction of deposition and slagging under low NOx firing conditions. United States: N. p., 1998. Web.
Hart, D., Lewis, R., Tobiasz, R., & Chen, W.. Firing system modification to alter ash properties for reduction of deposition and slagging under low NOx firing conditions. United States.
Hart, D., Lewis, R., Tobiasz, R., and Chen, W.. Wed . "Firing system modification to alter ash properties for reduction of deposition and slagging under low NOx firing conditions". United States.
@article{osti_20013517,
title = {Firing system modification to alter ash properties for reduction of deposition and slagging under low NOx firing conditions},
author = {Hart, D. and Lewis, R. and Tobiasz, R. and Chen, W.},
abstractNote = {The composition and properties of ash formed during coal firing have a major impact on boiler performance. Higher ash content in the coal can mean higher costs associated with coal handling, transportation, ash removal and ash disposal along with higher costs due to the increased ash content's deleterious effects on pulverizing, combustion and heat transfer. ABB C-E Services, Inc. has conducted research what might be done to minimize the adverse effects of ash on boiler performance for many years. Recently, ABB C-E Services has studied the effects of firing system modifications on ash composition and properties and the effect these firing system modifications have on overall furnace performance. The subject of this paper is the impact of the installation of the CFS{trademark} yaw angles were varied and particle samples were collected at the waterwalls for the different yaw angles tested. These ash samples were analyzed for ash composition. The results showed that with a larger CFS{trademark} yaw angle (the air stream directed more towards the boiler walls) the base/acid ratio, iron content and sulfur content of the particle samples collected at the waterwall were reduced. This effect is due to several contributing factors: (1) an oxidizing environment produced by injecting more air toward the walls; and (2) an aerodynamic change which impacts the particle combustion time/temperature history.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 1998},
month = {Wed Jul 01 00:00:00 EDT 1998}
}

Conference:
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