Gas Absorption
Technical Paper
WFGD Case Study -- Maximizing SO2 Removal by Retrofit with Dual Tray Technology
A.A. Silva and P.J. Williams
The Babcock & Wilcox Company
Barberton, Ohio, U.S.A.
J. Balbo
Michigan South Central Power Agency
Litchfield, Michigan, U.S.A.
Presented to:
EPRI-DOE-EPA-AWMA
Combined Power Plant Air Pollutant Control
Mega Symposium
August 28-31, 2006
Baltimore, Maryland, U.S.A.
6
The Babcock & Wilcox Company
BR-1785
WFGD Case Study - Maximizing SO2 Removal by Retrofit with Dual Tray Technology
Anthony A. Silva and Paul J. Williams
The Babcock & Wilcox Company
Barberton, Ohio, U.S.A.
James Balbo
Michigan South Central Power Agency
Litchfield, Michigan, U.S.A.
Presented to:
EPRI-DOE-EPA-AWMA
Combined Power Plant Air Pollutant Control
Mega Symposium
August 28-31, 2006
Baltimore, Maryland, U.S.A.
Abstract
Michigan South Central Power Agency (MSCPA) operates a nominal 55 MW unit with a limestone forced oxidized WFGD system. It has been in operation since 1983. The absorber was a tray tower with a single tray designed for 90% SO2 removal and supplied by The Babcock & Wilcox Company (B&W). The boiler fires high sulfur eastern bituminous coal producing SO2 loadings up to 7.5 lbs/MBtu. To increase the removal in the WFGD system,
MSCPA and B&W added a second tray in 2002 to take advantage of dual tray technology. SO2 removal has been increased from 90% to 98% without the use of organic acids. Performance tests and parametric tests have been performed on the system over the last two years. The testing also included tests for SO3, HF, HCl, and
PM. This paper discusses the absorber design, operating parameters, results of the testing and system chemistry.
Introduction
The need for maximum SO2 removal is necessary with the upcoming Clean Air Interstate Rule (CAIR). To meet these demands, high efficiency scrubbers are necessary. This paper provides an evaluation based on limestone, forced oxidized
WFGD Case Study -- Maximizing SO2 Removal by Retrofit with Dual Tray Technology
A.A. Silva and P.J. Williams
The Babcock & Wilcox Company
Barberton, Ohio, U.S.A.
J. Balbo
Michigan South Central Power Agency
Litchfield, Michigan, U.S.A.
Presented to:
EPRI-DOE-EPA-AWMA
Combined Power Plant Air Pollutant Control
Mega Symposium
August 28-31, 2006
Baltimore, Maryland, U.S.A.
6
The Babcock & Wilcox Company
BR-1785
WFGD Case Study - Maximizing SO2 Removal by Retrofit with Dual Tray Technology
Anthony A. Silva and Paul J. Williams
The Babcock & Wilcox Company
Barberton, Ohio, U.S.A.
James Balbo
Michigan South Central Power Agency
Litchfield, Michigan, U.S.A.
Presented to:
EPRI-DOE-EPA-AWMA
Combined Power Plant Air Pollutant Control
Mega Symposium
August 28-31, 2006
Baltimore, Maryland, U.S.A.
Abstract
Michigan South Central Power Agency (MSCPA) operates a nominal 55 MW unit with a limestone forced oxidized WFGD system. It has been in operation since 1983. The absorber was a tray tower with a single tray designed for 90% SO2 removal and supplied by The Babcock & Wilcox Company (B&W). The boiler fires high sulfur eastern bituminous coal producing SO2 loadings up to 7.5 lbs/MBtu. To increase the removal in the WFGD system,
MSCPA and B&W added a second tray in 2002 to take advantage of dual tray technology. SO2 removal has been increased from 90% to 98% without the use of organic acids. Performance tests and parametric tests have been performed on the system over the last two years. The testing also included tests for SO3, HF, HCl, and
PM. This paper discusses the absorber design, operating parameters, results of the testing and system chemistry.
Introduction
The need for maximum SO2 removal is necessary with the upcoming Clean Air Interstate Rule (CAIR). To meet these demands, high efficiency scrubbers are necessary. This paper provides an evaluation based on limestone, forced oxidized