[Gasification] spark discussion on dry filters

[andy schofield]

   Has there been a vehicle system for particulates smaller than is captured 
in a cyclone? These systems must be dry-phase. Gas temperature in my system 
at which point I want to install a good one is around 100F . The gas at this 
point has been reheated from first cooling from 675F (cyconed) to 90F. 
Reheating the saturated gas,adds latent heat to return water-vapor not 
condenced back to a gas. Cold start-up has been a problem with paper 
filters. Perhaps bypass-valving around the paper element.
At present, I am using a very large straw-packed element. Down-stream 
settling-chambers show evidence of small-volume of fine particles. a 
washable K&N F150 filter element may fit the bill, but they cost $40. I 
constructed a filter body to fit in-line. The filter body holds a paper 
element The element fell-apart after just one backfire pressure wave. I 
removed the body from the line.

    Having gone 700 miles in the F150 so far since replacing the GMC. My 
maple block fueled pickup is running well. Today I picked-up  a load of 
kiln-dried flooring cut-offs fueled almost entirely on wood.

  Clouds of smoke left in traffic behind the system have been eliminated by 
using a nozzle distributor manifold equipped with a suction valve for total 
primary air (which now can be ducted and preheated). I also improved engine 
combustion luft controls. enabling smoother transition between Ford EFI and 
united-nation (swedish) woodgas. Direct operator or (gasifier-system) 
variable Injector dutycycle  is next after a good filter is used to protect 
the powerful Ford cylinder-bores.

  I'm finding excess gas spills out of the mixer when I decend a particular 
hill, then climb up the next hill. This needs to be ducted somewhere safe!

Andy Schofield
Great Lakes Renewable Fuel systems

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