[Gasification] filtration options and their varying discontents

[Tom Reed]

Dear David and all 

Typically there is a flare in parallel with the engine, a valve choosing which.  On startup the poor gas, getting better is flared.  When the gas turns to a nice lilac color, it's time to turn the valve to engine which typically has been warming up on gasoline/diesel.

Tom Reed

Thomas B Reed 
280 Hardwick Rd
Barre, MA 01005

508 353 7841

On Dec 10, 2012, at 4:57 PM, "David G. LeVine" <dlevine at speakeasy.net> wrote:

> On 12/10/2012 02:44 PM, jim mason wrote:
>> the problem is typical operation is variable.  during start up you always go through a stoich point as you move air out of the system and progressively make gas.  even if you leave the system full of gas on shut down, start up in the reactor can pass lots of air until things get up to temp again.  this can easily result in a combustible mixture in the system.
>> 
>> we've found this to be a fairly significant operational reality that needs to be addressed for regular users.  similar for the impact of backfires from the engine igniting the intake stream.  while things are "usually" ok, the marginal events can be quite, umm, compelling . . .   we've started adding more pressure relief points where typically not needed to cover these outliers.  we're also looking to add a flame arrestor right  at the manifold to prevent backfires propagating.
> 
> Would a flame arrestor (basically a couple of layers of copper screen or a layer of copper wool) just before the ESP be sufficient to prevent propagation into the rest of the system?  All that needs is a pressure relief in the ESP for when there is a "marginal event".  If the throttle is before the ESP, not even a pop-off would be needed, but the volume sounds like it would be a bit too large that way.
> 
> Dave  8{)
> 
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