[Gasification] SPAM: Re: Getting both heat and char . chip boiler with down-up gasification !

Tue Jan 10 15:25:15 CST 2017

Doug, Rolf, 

We had to reduce the file size to below 1 MB and resend it. 

Tom

From: Gasification [mailto:gasification-bounces at lists.bioenergylists.org] On
Behalf Of Doug
Sent: Tuesday, January 10, 2017 10:46 AM
To: Energies Naturals C.B. <energiesnaturals at gmx.de>; Discussion of biomass
pyrolysis and gasification <gasification at lists.bioenergylists.org>
Subject: SPAM: Re: [Gasification] Getting both heat and char . chip boiler
with down-up gasification !

Hi Rolf,

It looks like I cannot send drawing or photos directly through the
Gasification List, so this last post was lost with all the written comment.
I even lost my copy, so probably I pushed keys before loading to file was
complete. Computers and I are not a good combination):-(

The outlet diameter is shown as 800mm which can easily be reduced if
necessary by placing a brick over part of the hole.

 There is no proportional calculation, just using a rough brick size. The
height of the combustion chamber shown at 800mm is just to form a fairly
large space with lots of vertical bricks to allow the gas to make them
incandescent. Think of the bricks doing the heating of  the moving exhaust
CO2 into that high temperature required. If the combustion is not completed,
my guess is that your tile stack will heat unevenly. A lot of skilled
observation will be required, and your ceramist technician will need to
learn a little about how to get the best out of this technology.

A tangential entry of the gas would give you surface contact with the
bricks, but there is a need to slow the gas down so that there is time to
get better energy exchange into the brick. You can stand the vertical
combustion chamber grill support bricks spaced away from the wall in a round
kiln. Possibly your advise will be not to bother with the grill, but you
will have opportunity to try out the best configuration once you start to do
a few tests.

I will try to find time to look at the Das gas maker, but hope Paul can
confirm the key parameters. Possibly others might contribute?

My suggestion is to keep it simple (KIS)

Doug W.

On 11/01/17 00:35, Energies Naturals C.B. wrote:

Thanks for the drawings,Doug.

Questions:
Do you mean 800 mm outlet diam? Or should it be 80?
And the proportions of the brick base grill >(also 800)in relation with the
kiln's internal height of 1m (1000)?

I guess you want the bricks inside the brick base to act as turbulators and
heat storage for shure ignition, sure?

What about the idea of a swirl chamber, in case the general shape was round?

I have taken contact with ceramist technicians for further advice.

Rolf

On Tue, 10 Jan 2017 06:00:07 +1300
Doug  <mailto:doug.williams.nz at gmail.com> <doug.williams.nz at gmail.com>
wrote:

Hi Rolf,

Please make sure you send these via the Gas List.

I am not sure that a round kiln will evenly heat a square test tile, but 
I have no experience of firing ceramics.

I would recommend bottom entry through a brick base grill.

The internal height of the kiln has already been specified by Pilar, and 
the rate of heat soaking of the kiln and ceramic load is controlled by 
the oxidation and reduction time. These are details that are not in my 
files from previous discussions.

Doug.

On 09/01/17 22:23, Energies Naturals C.B. wrote:

Thanks Doug,

we are getting closer to a design.
I had thought about round shape, easier to contain the tensions and less
surface area.
Do you recommand gas entry from above?

Rolf

On Mon, 9 Jan 2017 20:52:28 +1300
Doug  <mailto:doug.williams.nz at gmail.com> <doug.williams.nz at gmail.com>
wrote:

Having trouble with attaching the photos via the list.

Doug.

-------- Forwarded Message --------
Subject:      Re: [Gasification] Getting both heat and char . chip boiler
with down-up gasification !
Date:  Mon, 9 Jan 2017 20:28:00 +1300
From:  Doug  <mailto:doug.williams.nz at gmail.com>
<doug.williams.nz at gmail.com>
To:  gasification at lists.bioenergylists.org
<mailto:gasification at lists.bioenergylists.org> 

Hi Rolf and Paul, Colleagues,

I found these two photos in my files, and I do have others (not found)
showing the changes in combustion as the kiln heats up. Taken about late
1985, you are seeing the first Cyclomix burner in action, after Jack
Humphreys  and I presented it's design at the 2nd International
Gasification Conference in Bandung, Indonesia (1985), along with our
2,000 hr diesel duel fuel conversion tests results in association with
Lister NZ. I have to tell you that the memory of events in digging out
these old photos of Fluidyne development which number in hundreds,
bought back the painful lack of knowledge and difficulties of working in
isolation at the bottom of the World.

The enclosed photos of the kiln or combustion chamber as we knew it, had
vertical entry from the top, and after the internal brick work began to
glow, the heat gradually crept out of the bottom opening as you see
here. We used it to melt anything we had, mainly aluminium and glass
bottles, but it's practical value was to demonstrate that Gasification
could be used for high temperature applications. Before this, we built
horizontal brick combustion chambers for use in timber drying kilns, and
in these we used target bricks as Paul refers to, so that the gas was
forced to burn up against a refractory brick surface. We had three
timber kilns operating over two years, then Natural Gas came by the door!

Doug W.

On 09/01/17 08:14, Energies Naturals C.B. wrote:

https://www.youtube.com/watch?v=cF1Ki-ngFjE

Never seen before in heating boilers,clever!

Rolf

On Wed, 4 Jan 2017 13:33:30 +1300
Doug  <mailto:doug.williams.nz at gmail.com> <doug.williams.nz at gmail.com>
wrote:

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