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Home Case Studies Power Dry Scrubber Turning Vanes Printer Friendly PDF  
 
 
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NanoSteel Thermal Spray Coating Provides
Erosion Resistance on Dry Scrubber Turning Vanes
 
 
 
 
 
 
 
 
Problem: Severe Erosion
Spray drying absorption (dry scrubber) systems remove sulphur dioxide from flue gas at fossil fuel power plants.
 
At the top of dry scrubber units, hot flue gas enters a dispersing unit at 300° F. Turning vanes on a fixed dispersion ring direct the gas flow into a rotary atomizer where it comes in contact with a spray mixture of fly ash, lime milk and cooling tower blowdown water that absorbs sulphur dioxide into alkaline droplets. The water evaporates immediately and the droplets are converted into a powder that is discharged from the chamber.
 
Turning vanes on the dispersion ring are fabricated from untreated A36 carbon steel. During service, fly ash particles in the flue gas cause material loss from severe erosion.
 
Solution: NanoSteel Thermal Spray Coating
To reduce material loss on turning vanes inside dry scrubber unit at a coal fired power plant in Arizona, a NanoSteel SHS 9172 TWAS thermal spray coating is applied for resisting erosion.
 
   
   
Result: Improved Erosion Resistance and Extended Service Life
The NanoSteel SHS 9172 TWAS coating provides resistance to severe erosion for reducing material loss, improving performance and extending the service life of turning vanes on the fixed dispersion ring.
 
 
 
 
 
  The NanoSteel Company
272 West Exchange Street, Suite 300
Providence, Rhode Island 02903
toll free 1-877-293-NANO
phone (401) 270-3549
fax (401) 270-9306
www.nanosteelco.com
info@nanosteelco.com
 
 
  Additional Information
For project cost analysis, contact NanoSteel toll free at 1-877-293-6266 in the United States and Canada or 001 401 270 3549 internationally, or e-mail quote@NanoSteelco.com.
 
 
 

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