[TheForge] Vapor/Gas (Was: Building a propane forge)

[Bruce Freeman]

Sounds like you need a pyrometer.  A simple pyrometer can be cobbled
together from a thermocouple (type K or R, IIRC - Check the Omega
Engineering website or catalog) and a decent quality digital millivolt
meter (20,000 ohms/volt minimum input impedence).  If you have the
meter, this is about a $20 expenditure.
Bruce
NJ

>>> Keporter@aol.com 2/18/2004 6:30:27 PM >>>

<snip>
Here is what I'm getting at; the theoretical limit for propane 
burning in air is supposed to be F 3600. Previous burners averaged
about F 2250. My 
designs haven't been put to any scientific tests (lack of money) but
they 
seem to increase NOx. When one of the bigger models is running fully
heated, I 
can smell something like ozone. Fuel/air burners put out raised levels
of NOx 
between 2800 and 3100 degrees. Above or below that temperature the
levels fall 
again. So, we have a possible indication of their temperature range. I
have 
also compared them to earlier burners running on MAPP and on Propylene.
They run 
a little hotter with propane than the other burners with MAPP or
Propylene. 
Again, this indicates a temperature over 2800 degrees. Am I happy? Yes,
but far 
from satisfied. Between five and eight hundred degrees are left
unachieved; We 
want them. Furthermore, with the EPA breathing down everyone's back,
NOx will 
become an issue for even the hobbyist sooner or later. Why wait for the
dog 
pack to come howling at our shop doors to "rise above it"?  We
certainly don't 
want to go the other way.
Mikey



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