Hannah Brehmer on thu 29 apr 99
Hi, all you wonderful clayart people!
I love this forum - have received some good advice to questions.
Here's a new one: Why do my natural gas venturi burners (MR750) whistle so
badly on my recently built kiln?? When the gauge reaches about 3, they
begin to emit this high-pitched squeal that would probably injure my ears
if I stayed there a long time. So I can't really work in my studio while
I'm firing. Marc Ward, are you there? : -) By-the-way, I am at 6200'
elevation. Thanks to all, Hannah, at South Lake Tahoe, CA, where
spring still seems a long way away. (Skiing is great, though!)
nikom chimnok on sat 1 may 99
Dear Mark Ward:
Hannah is not alone with the whistling venturi burner problem.
Friends jup the road just had a new 2.5 cubic meter kiln built, with
"advanced" burners that have plates of stainless steel (like sink drains)
instead of just a hole in a ceramic circle. We fire with LNG, so the
pressure is high--up to 8 PSI. But what makes them whistle is the air coming
in. I know this because if you adjust the primary air shutters to zero, the
whistling stops, and as you open them up, it increases. Needless to say, you
can't do an entire firing with the primaries shut down. It's a horrible
high-pitched whistle that drives me crazy.
Hope this give you further ideas, and if you can think of a remedy,
please post.
TTYL,
Nikom in Northeast Thailand in the rainy season (half the workers have quit
to go plant rice)
Charlie and Linda on sun 2 may 99
Marc Ward wrote:
>
> ----------------------------Original message----------------------------
> Hannah,
>
> Anytime air passes across a hole, there's a chance for a noise. Musicians on
> the list can address that better than me. To have a Venturi make noise is
> rare as the gas is passing through the hole instead of across.
Hi Mark
You know there are times when that little voice in the back of my head
says, "Naw, don't, just leave it alone." Oh well, here goes anyway....
Just an idea. Make all the burners whistle. Each burner size would be
set in a different octave or key. To tune you kiln just open the
primary air until the harmonics are just right! No more eye balling the
flame. If you need a different oriface size just order by what key it is
in.
A potential customer would query, "I'm building an updraft 40 cu. ft.
fiber kiln with 6" of fiber in the walls, ceiling, and door with the
floor of hard brick. What would you suggest for burners?"
The response might be, "I would suggest two power bass burners in the
key of low C or 6 soprano venturis in F. A tuning fork in the
appropriate key will accompany any order of 600.00 or more...."
How about rename the company, Whistling Dixie Burners!
Ok, ok. I said it was just an idea, not whether it was a GOOD idea...
Enough hot air...
Charlie Riggs
PS-Mark, I'l be in Greensboro, NC teaching another raku kiln building
workshop in June. We'll be building 20 kilns in two days and they will
need to order brick and burners. If you'd be kind enough to sends a 1/2
dozen catalogs. Thanks.
462 Firetower Rd
Carthage, NC 28327
John Anderson on mon 3 may 99
Hi to all with "Whistling Venturi Burners"
I am replying in the middle of this discussion, and may have missed some
details so please excuse me if I am covering details that have already been
mentioned.
Twenty seven years ago I started firing with Propane and had the same
problem, at the time the burners where straight inshot with a length of the
Venturi at 6" with a 2" diameter. I increased the length of the Venturi to
9" and had no more whistling.
Suggestion, experiment with different lengths.
Hope this is of help, if more details are needed feel free to contact me
direct.
Cheer's
John Anderson. mailto:jd_anderson@bc.sympatico.ca
----- Original Message -----
From: nikom chimnok
To:
Sent: May 1, 1999 7:13 PM
Subject: Re: Whistling Venturi Burners
> ----------------------------Original message----------------------------
> Dear Mark Ward:
> Hannah is not alone with the whistling venturi burner problem.
> Friends jup the road just had a new 2.5 cubic meter kiln built, with
> "advanced" burners that have plates of stainless steel (like sink drains)
> instead of just a hole in a ceramic circle. We fire with LNG, so the
> pressure is high--up to 8 PSI. But what makes them whistle is the air
coming
> in. I know this because if you adjust the primary air shutters to zero,
the
> whistling stops, and as you open them up, it increases. Needless to say,
you
> can't do an entire firing with the primaries shut down. It's a horrible
> high-pitched whistle that drives me crazy.
> Hope this give you further ideas, and if you can think of a
remedy,
> please post.
> TTYL,
> Nikom in Northeast Thailand in the rainy season (half the workers have
quit
> to go plant rice)
>
| |
|
