Air compressor system basics

Well, this gets very "backyard" or very complicated, "depending"

on what your local weather is, and just how dry you need. There are refrigeration dehumidifiers that costs hundreds or thousands of dollars.

Very first thing you need to do is "pitch" your piping so that there are no low spots. You want to pitch the piping just like plumbing drains "or more" IE 1/4" per foot or more. Put periodic drip legs, with drains on the bottoms.

Picture a long run (like I have, LOL) of hose, lying on the ground, on a cold, wet day. The compressor sucks in wet air, vaporizes it, and SOME of it remains airborne, does not condense in the tank, and carries out the hose, where, between tool uses, water condenses in the cool hose. This can generate a "trap" or "slug" of water which can, well. . ..... . .. make a big mess

Fairly effective is to come up with some sort of piping / tubing/ tank that is SAFE which you can use as a heat exchanger. "white lightnin' still" style. The basics of this are a tank, garbage can, etc, to hold water, with a coil of tube, an tank in the bottom to catch condensate, and some way to drain it daily.

The chemical dryers are fairly effective, use beads in what amounts to a water trap. I'd say they are fairly cost effective for some things. Probably NOT for a big blaster, as they use one heck of a lot of air.

Last, SAFETY. Don't use old, rusty, unknown tanks unless you are willing to hydrotest them