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Title: Pre-fired, refractory block slag dams for wet bottom furnace floors

Slagging (wet bottom), utility boilers count on a refractory coating over the furnace floor tube structure for protection from corrosion damage from both the harsh, hot gas atmosphere from the burning fuel and the acidic coal slag. To protect and extend the life of this protective refractory coating the boiler original equipment manufacturers (OEMs) utilized a water-cooled monkey ring or slag chill ring (typically a 6--8 inch high ring of small diameter tubes) surrounding the slag tap locations on most wet bottom furnace floors (both utility and package boilers). The old water-cooled tube ring was such a high maintenance item, however, that it`s use has been discontinued in all but the most extreme environments throughout both utility and industrial applications. Where the use of the ring was discontinued, there has been a corresponding shortening of life on the protective floor refractory coatings (high maintenance cost), further aggravated by recent OSHA restrictions limiting the use of chrome oxide refractory materials in these types of boilers. This paper describes the developmental process and the final resultant product (a non-watercooled, slag dam made from pre-fired refractory shapes), undertaken by the inventors. Derived operational benefits a concept 2 project, with NO{sub x} Title 4more » and Title 1 significance (which is currently underway) will also be detailed.« less
Authors:
 [1] ;  [2]
  1. Commonwealth Edison Co., Downers Grove, IL (United States)
  2. Commonwealth Edison Co., Joliet, IL (United States)
Publication Date:
OSTI Identifier:
320914
Report Number(s):
CONF-980426--
Journal ID: ISSN 0097-2126; TRN: IM9910%%104
Resource Type:
Conference
Resource Relation:
Conference: American power conference, Chicago, IL (United States), 14-16 Apr 1998; Other Information: PBD: 1998; Related Information: Is Part Of Proceedings of the American Power Conference: Volume 60-2; McBride, A.E. [ed.]; PB: 588 p.
Publisher:
Illinois Inst. of Tech., Chicago, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 20 FOSSIL-FUELED POWER PLANTS; CORROSION PROTECTION; FURNACES; FOSSIL-FUEL POWER PLANTS; SLAGS; EROSION; WEAR; ENERGY CONSERVATION