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POST COMBUSTION DOESN.T RAISE BTU CONTENT:
http://www.daytondailynews.com/n/content...
Replacing filters at two coal burning plants — now that's a dirty job
By John Nolan
Staff Writer
Friday, July 06, 2007
WRIGHT-PATTERSON AIR FORCE BASE – It's the time of year for an essential but truly dirty job: inspecting and replacing hundreds of cloth filter bags that catch emissions from two coal-burning plants on the base.
The mid-1950s plants were upgraded with the baghouse filtering systems in the 1990s to clean up the emissions and bring them into line with environmental laws. The plants, via either circulated steam or superheated water, provide wintertime heat for hundreds of buildings in Areas A and C of Wright-Patterson Air Force Base. The base relies on commercial utilities for its electric power and natural gas needs.
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The Air Force began operating the baghouse filters at one of the plants in 1996 after environmental regulators determined that the plant's prior emission-control system was failing to meet clean-air standards, said Jennifer Marsee, a supervisor at the Regional Air Pollution Control Agency which helps enforce state and federal clean-air standards.
The base voluntarily installed the baghouse filters at the second plant and began operating that system in 2000, Marsee said. Their emission-control use is now a part of the clean-air operating permit issued to Wright-Patterson.
"It made a huge difference in their emissions," Marsee said of the filter bags. "We've seen a huge improvement."
Maintenance season for the plants is between April, when they typically are shut down, and their return to operation in October. Ken Ferguson, boiler plant supervisor, is overseeing the maintenance, including the bag inspections.
The two plants each have three coal-fired boilers. Each boiler can contain up to 840 of the filter bags, which are 6 inches wide by 16 feet long and vaguely resemble extremely long athletic socks.
Maintenance crews must empty the bags and replace those which are worn-out. The bags, made of fiberglass fabric coated with Teflon to withstand 500-degree heat, can last four to seven years.
The coal bill for last year alone was $7 million, based on the plants' 2006 consumption and the $124-per-ton market price than of the low-sulfur Kentucky coal the plants use, the plant operators said. But that still represents a cheaper heat source than electricity or natural gas, said Mark Mays, chief of the environmental management division for the 88th Air Base Wing at Wright-Patterson.
The base managed to negotiate a $98 per ton price for the coal this year, base spokesman Derek Kaufman said.
Flyash waste from the coal burning is sent to a Fairborn plant for use in producing concrete, Ferguson said.
Contact this reporter at (937) 225-2242 or jnolan@
DaytonDailyNews.com.
WPAFB energy costs
(For the fiscal year which ended
Sept. 30, 2006)
Electricity: $18.1 million
Natural gas: $5.6 million
Coal: $7 million
Fuel oil: $42,000
Source: Wright-Patterson Air Force Base
POST COMBUSTION DOESN.T RAISE BTU CONTENT:
http://www.daytondailynews.com/n/content...
Replacing filters at two coal burning plants — now that's a dirty job
By John Nolan
Staff Writer
Friday, July 06, 2007
WRIGHT-PATTERSON AIR FORCE BASE – It's the time of year for an essential but truly dirty job: inspecting and replacing hundreds of cloth filter bags that catch emissions from two coal-burning plants on the base.
The mid-1950s plants were upgraded with the baghouse filtering systems in the 1990s to clean up the emissions and bring them into line with environmental laws. The plants, via either circulated steam or superheated water, provide wintertime heat for hundreds of buildings in Areas A and C of Wright-Patterson Air Force Base. The base relies on commercial utilities for its electric power and natural gas needs.
Extras
Latest headlines
NASCAR suspends driver and fiancée after drug arrests
Special counsel: Heck violated federal law
Local man dies after motorcycle hits deer
Births, marriages, divorces
Meadowdale High student dies after stabbing in Columbus
Most popular
Meadowdale High student dies after stabbing in Columbus
Man shoots through door, hits woman in neck
Reds' possible game plan: Let's make a deal
Foul words lead to bicyclist's arrest
Reds' roster should get overhaul
Shoppers round up, hold suspected bank robber for police
Get latest headlines via RSS feeds
The Air Force began operating the baghouse filters at one of the plants in 1996 after environmental regulators determined that the plant's prior emission-control system was failing to meet clean-air standards, said Jennifer Marsee, a supervisor at the Regional Air Pollution Control Agency which helps enforce state and federal clean-air standards.
The base voluntarily installed the baghouse filters at the second plant and began operating that system in 2000, Marsee said. Their emission-control use is now a part of the clean-air operating permit issued to Wright-Patterson.
"It made a huge difference in their emissions," Marsee said of the filter bags. "We've seen a huge improvement."
Maintenance season for the plants is between April, when they typically are shut down, and their return to operation in October. Ken Ferguson, boiler plant supervisor, is overseeing the maintenance, including the bag inspections.
The two plants each have three coal-fired boilers. Each boiler can contain up to 840 of the filter bags, which are 6 inches wide by 16 feet long and vaguely resemble extremely long athletic socks.
Maintenance crews must empty the bags and replace those which are worn-out. The bags, made of fiberglass fabric coated with Teflon to withstand 500-degree heat, can last four to seven years.
The coal bill for last year alone was $7 million, based on the plants' 2006 consumption and the $124-per-ton market price than of the low-sulfur Kentucky coal the plants use, the plant operators said. But that still represents a cheaper heat source than electricity or natural gas, said Mark Mays, chief of the environmental management division for the 88th Air Base Wing at Wright-Patterson.
The base managed to negotiate a $98 per ton price for the coal this year, base spokesman Derek Kaufman said.
Flyash waste from the coal burning is sent to a Fairborn plant for use in producing concrete, Ferguson said.
Contact this reporter at (937) 225-2242 or jnolan@
DaytonDailyNews.com.
WPAFB energy costs
(For the fiscal year which ended
Sept. 30, 2006)
Electricity: $18.1 million
Natural gas: $5.6 million
Coal: $7 million
Fuel oil: $42,000
Source: Wright-Patterson Air Force Base












