Condensing heat exchangers for maximum boiler efficiency
- Babcock and Wilcox Co., Barberton, OH (United States). Environmental Equipment Div.
Until now, boiler efficiency has been limited due to the minimum temperature allowed at the stack. Heat lost up the stack was in exchange for keeping the flue gas temperature above the water vapor dew point. If water vapor was allowed to condense out, rapid deterioration, due to acid corrosion, of the outlet duct and stack would result. With the development of the condensing heat exchanger, boiler efficiency can now exceed 90%. Approximately 1% gain in boiler efficiency can be expected for every 40 F (4.5 C) reduction in flue gas stack temperature. In the CHX{reg_sign} condensing heat exchanger, all gas wetted surfaces are covered with DuPont Teflon{reg_sign}. The Teflon covered heat exchanger surfaces are impervious to all acids normally resulting from the combustion of fossil fuels. This allows the flue gas to be cooled to below the water vapor dew point with no subsequent corrosion of the heat exchanger surfaces.
- OSTI ID:
- 78286
- Report Number(s):
- CONF-941007-; ISBN 0-7918-1381-9; TRN: IM9531%%337
- Resource Relation:
- Conference: 1994 international joint power generation conference, Phoenix, AZ (United States), 2-6 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of Heat exchanger technologies for the global environment. PWR-Vol. 25; Maurer, J.R. [ed.] [Allegheny Ludlum Corp., Brackenridge, PA (United States)]; PB: 178 p.
- Country of Publication:
- United States
- Language:
- English
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