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Method and apparatus for enhanced heat recovery from steam generators and water heaters

United States Patent

June 27, 2006
View the Complete Patent at the US Patent & Trademark Office
A heating system having a steam generator or water heater, at least one economizer, at least one condenser and at least one oxidant heater arranged in a manner so as to reduce the temperature and humidity of the exhaust gas (flue gas) stream and recover a major portion of the associated sensible and latent heat. The recovered heat is returned to the steam generator or water heater so as to increase the quantity of steam generated or water heated per quantity of fuel consumed. In addition, a portion of the water vapor produced by combustion of fuel is reclaimed for use as feed water, thereby reducing the make-up water requirement for the system.
Knight; Richard A. (Brookfield, IL), Rabovitser; Iosif K. (Skokie, IL), Wang; Dexin (Indian Creek, IL)
Gas Technology Institute (Des Plaines, IL)
10/ 961,438
October 8, 2004
The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of contract No. DE-FC36-00ID13904 awarded by the U.S. Department of Energy.