Kenneth F Hoover

US Patent:

6905658, Jun 14, 2005

Filed:

Jun 29, 2001

Appl. No.:

09/896169

Inventors:

Kevin J. Rogers - Wadsworth OH, US
Michael G. Varner - North Canton OH, US
Kenneth F. Hoover - Mogadore OH, US

Assignee:

The Babcock & Wilcox Company - New Orleans LA

International Classification:

B01D053/34

US Classification:

422172, 422176, 422177, 422105

Abstract:

A device for channeling boiler flue gas flow and injecting controlled amounts of ammonia upstream of a selective catalytic reduction (SCR) NOremoval system. A perforated plate and/or damper can be located within one or more channels to provide volumetric control through a channel. Flow conditioning devices such as static mixing tabs and/or flow straightening tube bundles can optionally be included in each channel to improve mixing and velocity profiles. Gas flow rate measurements made, for example via pressure taps, within one or more channels can be used to measure flow and provide feedback for improved ammonia-to-NOmole ratio control.