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.
What was failing
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.
How AAS approaches it
We take the housing internals back to clean steel by grit-blasting so the rebuild and the lining have a sound surface to grab. We rebuild the pitted wall and the worn pad support ledge with composite, returning the lost metal, then we dress the ledge back flat so the pad seats true on it. After the rebuild is shaped, we line the housing internals 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 chemistry
We inspect the housing internals to map the pitting on the wall and the metal loss on the pad support ledge, and confirm the vapor chemistry so the lining is keyed correctly.
Grit-blast prep
We grit-blast the housing internals to clean, profiled steel so both the composite and the barrier coat bond to bare metal.
Rebuild wall and ledge
We rebuild the pitted wall and the worn pad support ledge with composite, returning the lost metal back to profile.
Dress the ledge flat
We dress the rebuilt ledge back flat and in plane so the demister pad seats true on it.
Line and return to service
We line the internals with a barrier coat matched to the vapor chemistry, putting the rebuilt areas and the wall under one film, then hand the housing back ready for the pad to be reset.
The result
From the job
Repair and protection work of this kind, performed by AAS crews across Louisiana.
Capabilities used here
Where this work happens
Other projects
Storage Tank Floor Reclamation
Corroded aboveground tank floor rebuilt and lined back to immersion service without cutting out plate.
View project
Centrifugal Pump Rebuild & Efficiency Restoration
Cold-rebuilding an eroded pump casing and lining it to restore clearances, no new casting required.
View project
Live Pipe Leak Seal & Composite Wrap
Live leak sealed and a degraded process line reinforced with an engineered composite wrap, no welding and often no shutdown.
View project
Wastewater Clarifier & Concrete Structure Relining
Spalled, rebar-exposed concrete clarifier rebuilt and relined for continued immersion service.
View project
Heat Exchanger Water Box Protection
Blasting, metal rebuild, and a barrier coating restore a corroded exchanger water box and tube sheet in cooling-water service.
View projectHave equipment that needs to stay in service?
Tell us what is failing. We respond quickly, and we offer 24-hour on-call service.