In the image above, you have:
1. A Cyclone, a primitive dust collector that mostly takes out big chunks, more than 1/100 of an inch,
2. A Bag House, an enclosure that has a BUNCH of bags as tall as the structure, like a vacuum cleaner bag, below the cyclone size particle, and
3. An Electro Static Precipitator, in this box there are a charged wires and oppositely charged plates. The smallest particles are taken out with this one.
Tom Todd