[Gasification] pre mixed boiler secrets?

[Mark Ludlow]

Check valves on the acetylene and oxygen hoses may have been a nice touch.

-----Original Message-----
From: gasification-bounces at lists.bioenergylists.org
[mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of nick
malek
Sent: Tuesday, May 17, 2011 07:35
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] pre mixed boiler secrets?

flashbacks do happen
i use to repair gas welding equipment when i was much younger and i
saw allot of hoses burnt out inside due to flashbacks
the only thing that save the gas bottles and very dangerous explosion
 was the regulators they would need complete rebuilds

On 5/17/11, Pete & Sheri <spaco at baldwin-telecom.net> wrote:
>
>
> Blacksmiths make and use gas forges a lot these days. Usually propane and
> air.  Our forges always premix fuel and air.  The problem SEEMS to be
> similar, but I hardly ever hear of the flame burning back in the burner
> tube.
>
> Some are naturally aspirated and some use small (or not so small) blowers
to
> supply air for combustion.
>
>
>
>  Here is my personal favorite design:
>
> http://www.spaco.org/Blacksmithing/PipeForge/PipeForgeAndPropane.htm
>
>
>
> In this model, I run as high as about 10 psi propane through a 1/16" dia.
> Orifice and use a little blower in the range of 20- 120 cfm, but severly
> choked down.
>
>   BYW, this model easily gets up to forge welding temperatures; not all
gas
> forges do that.
>
>
>
>    Once the forge is well heated, I usually reduce the pressure to about
2-5
> psi.
>
>
>
> You mentioned "thermo acoustics" or some such:
>
> All of these gas forges make a fair amount of noise.  Unless something is
> wrong, the noise is a steady white-noise-like drone, a lot like what you'd
> expect from large weed burner.  There is NO pulsation.  Maybe what is
> happening in your system is similar to what made the V1 work?
>
>
>
> I don't know if any of this would apply to your situation, but maybe there
> is some food for thought.
>
>
>
> Note the simple design of the flame tube.  I can see from my limited
> experience, though, that the issue of pressure drop when you only have
> several inches/water column to deal with, is real.
>
>
>
> Still looking for the perfect grid tie controller in the 30-50KW single
> phase range (and just bought a 30KW Onan Genset about an hour ago,
>
> Pete Stanaitis
>
> -----------------
>
>

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