KHIA headerKnow-How in Action

VOL XXVI, NO 100

Abrasion Protection For Coal Classifiers With Belzona® 1813

 
 

Industry:

Power (POWR)

 
 

Application:

Solids Handling Machinery (SHM)

 
 

Customer Location:

Germany North Rhine Westfalia

 
 

Application Date:

August 2011

 
 

Application Situation:

Coal-fired power station. The coal classifier is installed behind the coal pulverising mills. The pulverised coal is subsequently injected into the boiler furnace via the coal classifier.

 
 

Problem:

Extensive abrasion and wear

 
 

Products:

Belzona® 1813

 

Substrate:

Quenched and tempered C60 steel

 
 

Application Method:

Initially, an ASR form was completed and reviewed by the technical team. Belzona® 1813 was applied by hand to the classifier edges and plate sides to a depth of approximately 100 mm.

 
 

Belzona Facts:

The life of each classifier had been about six months, with service conditions including temperatures of up to 160°C (dry) and a throughput rate of approximately 5000m3/h per unit. Following the application of Belzona® 1813 on a trial basis, there were few signs of abrasion on the classifier deflector plates upon inspection 10 months later, in 2012. As a result, the customer plans to coat the old classifiers with Belzona® 1813 to prolong service life and other power stations within the group are investigating the use of this technology.

 
 

Photographs Description

  1. View of one of the coal dust classifiers 
  2. Close-up of a coal classifier showing the wear (top right)  
  3. Completed surface preparation 
  4. Application in progress
 
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