Filament Drying preliminary results

[NeverDie]

@MZip

I don’t know what desiccant they are using but maybe molecular sieves with that low of dew point?

I referenced the air dryer’s here:

How are people keeping their filament dry?

Sounds like a winner to me. Not quite a fluidized bed, but apparently the problem with fluidized beds made out of desiccant is that desiccants tend to be kinda brittle and end up breaking apart from the collisions and eventually turning into dust, and then you need an extra filter to remove the dust. Cycling through the same desiccant column over and over, without the friction, is, I’m guessing, the next best thing, since dwell time seems to be so important. For inspiration, I found these in…

If you go to the first one:
https://www.boltontool.com/56-cfm-anti-explosion-heatless-regenerative-desiccant-air-dryer
then you find it described as using activated alumina, with an option for molecular sieve. Silica Gel beads become very inefficient at very low RH’s, which explains why they are dismissed.