We recently relined a Pollution Control burn off oven in Texas. It was about 110 degrees and it was like working inside an oven.
A PCP burn off oven has many layers of insulation. There is an inner layer of asphalt insulation that protects the walls from the moisture from the water spray and any corrosive fumes from burning PVC containing components. Above this is a two inch block insulation. Above that is a one inch roll insulation. It is topped off with a stainless wire mesh and in some areas such as the door it has a sheet of perforated aluminized steel.
Condition at start
This was the condition of the oven when we arrived.
The oven had lots of holes and needed lots of wall repairs. Here is a section of the ceiling in the back that damaged by corrosion.
The damage was extensive.
Here is a YOUTUBE video of the oven before relining.
After Stripping Down the Walls
After Stripping the oven looked like this:
Asphalt and Block Insulation
After cleaning and repairing the walls, we added a layer of asphalt sheet coating. This comes in a roll. The seams between the sheets are sealed with a adhesive/sealer to prevent air and moisture leakage. This is one of the most time consuming parts of the reline process. We also started to put on the two inch block insulation.
Roll Insulation
This is the almost completed door with the block insulation, the roll insulation and the hex wire mesh over the insulation. It still needed the aluminized steel layer to protect the insulation from getting damaged.
Here is the oven with the doors finished. The two inch insulation in place at the back of the oven. One one side has the roll insulation.
Finished Oven
Here is some detail of the edge of the door with all layers added and the gasket put in.
The completed burn off oven was ready to go!
Here is a YOUTUBE video of the completed oven.
This page is still being edited but I wanted to make a useful outline of the relining process.