KHIA headerKnow-How in Action

VOL XXI, NO 48

Demonstrated Longevity In An Fgd Repair

 
 

Industry:

Power (POWR)

 
 

Application:

Valves, Pipes and Fittings (VPF)

 
 

Customer Location:

Coal-Fired Power Plant - Cumberland City, Tennessee USA

 
 

Application Date:

November 2005

 
 

Application Situation:

Flue gas desulfurization scrubber operating at 200°F (93°C) comprised of five spray levels each with six lime slurry pipes.

 
 

Problem:

Lime slurry from the four spray levels above had caused an existing polyurea coating to fail exposing the relatively soft FRP piping to the erosive forces of the lime slurry. Should the piping become holed, side streams would decrease the overall scrubbing efficiency resulting in increased operating costs.

 
 

Products:

Belzona® 5891 (HT Immersion Grade)

Belzona® 1391 (Ceramic HT)

 

Substrate:

FRP - Fiber Reinforced Polymer

 
 

Application Method:

Belzona® 5891 and Belzona® 1391 were applied in accordance with a modified Belzona Know-How System Leaflet VPF-2.

 
 

Belzona Facts:

Replacement of existing tapered FRP piping would have required an unacceptably long lead time and was considered prohibitively expensive. Belzona was selected because the repair can be conducted quickly and inexpensively in situ while providing the required abrasion, temperature, and chemical resistance.

 
 

Photographs Description

  1. Exterior of the FGD at the spray level 
  2. Severely damaged FRP pipe caused by lime slurry 
  3. Completed Belzona application to one of six lime slurry header pipes 
  4. Belzona repair after seventeen months in service
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com