The Babcock & Wilcox Company

Babcock & Wilcox Power Generation Group, Inc.

Robert M McNertney

Jeb W Gayheart

Peter W Waanders

Donald E Ryan

Geza G Csatlos

Steven P Iannacchione

An economizer arrangement particularly suitable for new or retrofit application to existing steam generators provides a water cooled stringer support tube system which can accommodate firing a wide range of fuels with varying characteristics in the steam generator. The economizer arrangement according to the present invention is particularly suited for retrofit applications to large supercritical steam generators. The use of water cooled stringer tube supports allows for higher flue gas temperatures in comparison to conventional non-cooled mechanical economizer supports. These features are provided in a design which fits within the existing economizer envelope of the steam generator.

Economizer arrangement for steam generator

A passive system for recovering energy and nitrogen oxides from flue gas produced by a boiler, and which employs a particular arrangement of economizer surface to ensure that the temperature of the flue gas entering a selective catalytic reduction (SCR) reactor is maintained within a required range over a wide range of boiler loads.

Passive system for optimal NOx reduction via selective catalytic reduction with variable boiler load

Growing community of inventors

Canal Fulton, OH, United States of America

Robert M McNertney