[TheForge] Restuperative burner

[Daniel Kretchmar]

me too!

Dan 
----- Original Message ----- 
From: "robert hensarling" <rhrocker at hilconet.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Monday, June 26, 2006 3:05 PM
Subject: Re: [TheForge] Restuperative burner


> Yes please Jeff, I'd like to see photos of  your forge.
> 
> ----- Original Message ----- 
> From: "Jeffrey Polaski" <jeff.polaski at rgs.uci.edu>
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Monday, June 26, 2006 3:00 PM
> Subject: [TheForge] Restuperative burner
> 
> 
> Well, I finally got my recuperative burner built and it works fine! I've
> read about the Sandia forge and its recuperative burner, so I thought
> I'd make one too. But it's made from off-the-shelf hardware, so there is
> very little fabrication.
> 
> I finally got around to it because I was in a traffic accident and the
> inside of my old forge got busted up a bit... (The car I was in got
> totaled, it knocked the wheels off the rear rims, but I was fine. The
> only other "casualty" was a bottle of my favorite mead). Anyways, the
> inside lining of the old forge got busted up a bit and it just didn't
> run anywhere as hot. The ITC-100 really makes a difference! I decided
> *not* to do the simple, obvious thing and repair the old forge... So I
> made a new forge that would be a little more of a "test bed", to try out
> a few burner ideas.
> 
> Just a little about the forge body: it's fairly big, and has three
> inches of ceramic blanket insulation. It's all been soaked in colloidal
> silica, then the inside was coated with a 1/4"--1/2" thick layer of
> castable refractory (mizzou, I think). There is a piece of 1/2" thick
> kiln-shelf at the bottom. I skimmed on a layer of satanite and zirconium
> silicate on top of the kiln-shelf and castable. Then, just because I had
> it, I put a layer of ITC-100 over all that. The back is 2" of ceramic
> board, and the front is just a pile of fire-brick.
> 
> So, with that said, on to the burner... I don't remember if I posted
> about it before, but it's built with off-the-shelf hardware from Home
> depot.
> 
> In case you haven't seen a recuperative burner, the basic idea is that
> you boost the heat your burner puts out by per-heating the air. It's
> easily done by piping hot exhaust gas around the tube of the burner. 
> 
> It looks like this, sort of:
> 
>  \ /                A.) Reil-style burner head
>  | |
>  | |
>  | |
> /| |\               B.) 2"--1" adapter
> / | | \
> | | | |
> | | | ---            C.) T "side" outlet
> | | | 
> | | | ---
> | | | |
> | | | |
> | | | |
> | | | |
> | | | |              D.) End of 2" pipe
>  | |
>  / \                E.) Burner nozzle 
> 
> 
> All I'm doing is running a 3/4" Reil-style burner through a 2" piece of
> pipe with a 2" T at the end. The Reil burner "head" is above the T so it
> doesn't get heated. At the top of the T there is a 2"--1" adapter that
> the burner goes through. (no fancy fittings, it's just welded on). 
> 
> The larger pipe is open to the ceiling of the forge, so hot gas flows up
> the larger pipe, and is exhausted out the side of the T.
> 
> I don't have any way to measure the output heat or anything, but I can
> say it's a hella' hot setup. I've run it for a few hours at 10psi, with
> a small blower, and the forge gets to yellow/orange. 
> 
> If any one is interested, I'll post a few pictures. 
> 
> 
> Jeff Polaski
> Research and Graduate Studies Webmaster
> University of California, Irvine
> http://www.rgs.uci.edu/
> 949.824.6363
> 
> 
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