Sigh. In the 1930's the German ands French governments knew they would be sea embargo petro-fuel screwed AGAIN in any upcoming wide spread war. So they dumped millions of marks and francs to encourage alternative motor fuels development from any and all of their domestic possibilities. Most systems then in times of NOT need were geekish. This always happens when not real world proven. By the end of the 40's with real in world desperate million of hours refined useage all of the geek got replaced by daily usable and maintainable system solutions. Noboby anymore used unified all in one separetion/filtering/cooling systems. They then knew well by then about hot gas ability for liquids steaming, organic filters alternatively steam or condensate drop out moisture drownings, and tars and soots clogging every thing possible. Cooler filter trains were by then evolved to separate items to be able to be separately serviced for their different needs. In the 50's after the Suez shut down Crisis and the hot East/West Cold War raging the Swedish and Finnish governments sponsored gasifier system modernization with stainless and acid proof steels, rolled tube constructing, ash slope insulating, condensing monorator hoppers, etc. THEY then 1940's experienced made all of the ash separation/filtering/cooling as discrete separate serviceable components. They went now with with hot bag house or panel filtering. Google up Swedish SMF and Finnish VACOLA systems.
In the the 70's, 80's systems we forgot and went back to 30's with unitized cooling filtering again! In the 30's they did not know - unkowlegable - inexperienced. In the 70's 80's no excuse except just modern "It's a New Age" "We went to the moon!" arrogant and stupid attitude.
All of the current hundreds of hours usable systems today in the 21st century wisely back to using individually discrete serviceable separation/cooling/filter trains now again.
Combined separators/condensers/filter/conditioners have failed the test of actual in real world usage time and time again.
Why?? Output gasses Heats, Ash, Condensates, Tars and Soots.
Every minute word speculating on this puts you that much farther from either building and learning these all your self; or, going somewhere to learn all these hands on.
Seriously I am trying to save you fellows the year lost out of my life wasted until I learned woodgas is best learned hands-on.