Written by DSI Copyright 2010 nodust.com

PRB Mine Conveyor using a bag house before our Dry Fog System was installed.

Zero Visible Emissions after our Dry Fog System was installed & the Bag house was shut off.

The Powder River Basin is a region in southeast Montana and northeast Wyoming, about 120 miles (190 km) east to west and 200 miles (320 km) north to south, known for its coal deposits. The region supplies about 40 percent of coal in the United States. Powder River Basin Coal is classified as "sub-bituminous" and contains an average of approximately 8,500 btu/lb, with low SO2. Contrast this with eastern, Appalachian bituminous coal containing an average of 12,500 btu/lb and high SO2. PRB coal use has increased dramatically to reduce air pollution emissions from power plants. However, its characteristics greatly increase risk of fire and explosions.

DSI  pioneered the use of Dry Fog to control hazardous PRB Coal Dust from material handling at PRB Mines and PRB Coal Fired Power Plants. Today, in Wyoming, Fogging Systems are considered Best Available Control Technology (BACT) for PRB Coal conveyor transfer points and given a ZERO VISIBLE EMISSIONS rating. The EPA classifies fogging systems as Best Demonstrated Technology (BDT) for sub-bituminous coal handling.  Nearly every PRB Coal Mine now has a fogging system to control dust.

DSI is a leading supplier of dust control systems for plants using or converting to PRB Coal. We have installations throughout North America.  The last three PRB Coal Fired Plants built in Gillette, Wyoming have purchased DSI Dry Fog Systems (Wygen 2, Wygen 3 and Basin Electrics Dry Fork Station).

 Dust Discharge at Baghouse before Dry Fog.