Uncooked rice in a salt shaker is a natural dessicant. Might work in a blast cabinet.
The important thing is to NOT let the moisture get into the cabinet via the air stream.
Pipe layout can have a lot to do with how much and if water gets to the blast media. I saw a neat outline on pipe layout in a dessicant drier container for compressed air. They essentially had the pip (metal to act as radiator) flowing UP hill from the compressor. Water would condense and flow back towards the compressor but not into due to the was the tubing flowed.
All T's were upside down. Air entered the pip from the TOP with the leg of T pointing up. This way, any water than condensed could be drained back down the sloping tubing to a drain tap.
Lines taking air from the pipe also were via upsidedown T's. Condensed water didn't flow up hill. There were other tricks but it all added up. Basically, you have to THINK before you plumb and remember that water flows down hill, air is lighter than water and cold is on the right.  |