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

[Doug]

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 <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 <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 <doug.williams.nz at gmail.com>
>>>> To: 	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 <doug.williams.nz at gmail.com> wrote:
>>>>>
>

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