GUNITE
GUNITE
(OP)
I am looking at drawings for a 30 year old 4’-0” I.D. sour water stripper with internal trays. In the drawing I see that the tower has GUNITE layer on the inside. Now we are planning to replace the trays with new better performance trays. Now if the GUNITE layer has chipped at some places, I was wondering if there might be any problems with the fit up of downcomer panels with the tank walls on the inside. Please comment. Share any similar experiences if you have any.





RE: GUNITE
Good luck.
RE: GUNITE
Can you suggest vendors that can update Gunite lining?
RE: GUNITE
We have over thirty 500-1000 gal hot water storage tanks/heaters that are cement lined for corrosion protection and have been in service for 50 yrs or better. About 80 percent of the underground piping is cement lined for the same reason. We have a river water distribution system that has 3" thick lining as the river water gets quite brackish during the summer. AT one time the system had two large cement lined chlorination and aeration vessels.
Gunnite was also used on skirted tanks for fire proofing. The only problem with this was that the cement had a good percentage asbestos fiber added.
Some good information on gunnite.
http://www.sangerssilo.com/Gunnite.html
http://www.shotcrete.org/index.htm
RE: GUNITE
I am working on some Adsorber vessels which have Silica Gel beds in them. The silica bed drys the gas. The vessels operate in a cyclic temperature fashion and are lined with gunnite. Each vessel will undergoes a heating and cooling cycle twice per day. 20°C ? 300°C ? 20°C
The gunnite is used as insulation as it would take an enormous amount of heat and time to bring the 100 mm thick wall shell up to the required operating tempeature only to have to cool it down again.
RE: GUNITE