Demister and Mist Eliminator Housing Lining
Pitted mist eliminator housing wall and pad support ledge rebuilt and lined so the demister seats true and the wall stops losing metal.
A job completed with Belzona. This describes what the Belzona system does and how it goes on, not a record of a specific project by this distributor.
The challenge
The housing around a mist eliminator carries wet, aggressive vapor that sits against the wall above the liquid line, and over time that vapor thinned and pitted the steel where it pooled. The support ledge that the demister pad rests on had also lost metal, so the ledge no longer held the pad flat. When the ledge drops out of plane the pad stops sitting true, vapor finds a path around it, and the housing keeps losing wall in the same spots. Left alone, the thinning wall puts the integrity of the housing at risk and the pad cannot do its job.
The Belzona approach
Grit-blasting takes the housing internals back to clean steel so the rebuild and the lining have a sound surface to grab. Composite rebuilds the pitted wall and the worn pad support ledge, returning the lost metal, and the ledge is then dressed back flat so the pad seats true on it. After the rebuild is shaped, the housing internals are lined with a barrier coat matched to the vapor chemistry, putting the rebuilt areas and the surrounding wall under one continuous film. That way the demister seats correctly and the wall is separated from the vapor that was eating it.
- Assess and confirm chemistryThe housing internals are inspected to map the pitting on the wall and the metal loss on the pad support ledge, and the vapor chemistry is confirmed so the lining is keyed correctly.
- Grit-blast prepThe housing internals are grit-blasted to clean, profiled steel so both the composite and the barrier coat bond to bare metal.
- Rebuild wall and ledgeComposite rebuilds the pitted wall and the worn pad support ledge, returning the lost metal back to profile.
- Dress the ledge flatThe rebuilt ledge is dressed back flat and in plane so the demister pad seats true on it.
- Line and return to serviceThe internals are lined with a barrier coat matched to the vapor chemistry, putting the rebuilt areas and the wall under one film, and the housing goes back ready for the pad to be reset.
The result
- Pitted housing wall and pad support ledge rebuilt in place without replacing steel
- Ledge dressed back flat so the demister pad seats true
- Rebuilt areas and surrounding wall lined under one continuous barrier coat matched to the vapor chemistry
- Housing returned to service by factory-trained and factory-certified Belzona applicators
In the field
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Belzona Houston is the authorized Belzona distributor for South Texas and the Gulf, based in Alvin, Texas, we’ll survey your equipment and recommend the right cold-applied Belzona system, with 24-hour support.