<html><head></head><body bgcolor="#FFFFFF"><div>Is a fluidized bed considered to be horizontal? Just thought that might be what they had in mind.</div><div><br></div><div>Best regards,</div><div><br></div><div>Dan<br><br>Sent from my iPhone</div><div><br>On Jul 31, 2012, at 1:45 PM, "doug.williams" <<a href="mailto:Doug.Williams@orcon.net.nz">Doug.Williams@orcon.net.nz</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>
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<div><font face="Arial" size="2"><strong>Hi Jai,</strong></font></div>
<div><strong><font face="Arial" size="2">You ask:</font><br></strong><font face="Arial" size="2"><br>Can any one can tell me about the gasification of
horizontal gasification process how the grid can be made and position of the
nozzles should be. </font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2"><strong>The only horizontal gasification that may
fit your question, is applied to charcoal gasifiers, and also in a modified
version to those used for coal, and then of the better quality like anthracite.
In technical terms, you would refer to these as cross draft, which in a bed of
charcoal needs no tar burning or cracking to make clean gas. <u>These are not
suitable for raw fuels.</u></strong></font></div>
<div><font face="Arial" size="2"><strong></strong></font> </div>
<div><font face="Arial" size="2"><strong>In rough dimensions, you have a single
water cooled nozzle/steam generator that should be able to slide in and out to
set the best oxidation lobe position, so that the distance between the grate and
nozzle can vary from say, 20-25cm (8-10").</strong></font></div>
<div><font face="Arial" size="2"><strong>The nozzle bore can be 2-3cm, or smaller
depending on the output you seek. I am sure you will find very specific
information in any books discussing charcoal gasifiers. The water is
fed to the nozzle by drip control, and the steam generated is added to the in
going air, to make up the hydrogen content of the gas.</strong></font></div>
<div><font face="Arial" size="2"><strong></strong></font> </div>
<div><font face="Arial" size="2"><strong>The grate should have vertical bars about
1cm apart and say 10x10cm for a smaller output, and about 15x15cm if you use
a larger nozzle.</strong></font></div>
<div><font face="Arial" size="2"><strong></strong></font> </div>
<div><font face="Arial" size="2"><strong>Because ash will form along the underside
of the oxidation lobe, you will need to be able to drop the char bed by shaking
a second support grate located about 5cm under the air nozzle. Failure to do
this will see the ash melt and clinker form.</strong></font></div>
<div><font face="Arial" size="2"><strong></strong></font> </div>
<div><font face="Arial" size="2"><strong>I suggest you read up on charcoal
gasification before you build anything, but it is hard to fail when the fuel is
just charcoal.</strong></font></div>
<div><strong><font face="Arial" size="2">You can see an old one from WW2 on the
Fluidyne Archive <a href="http://www.fluidynenz.250x.com">www.fluidynenz.250x.com</a> under
Australian WW2 gasifier. These were photos, not digital, so not sure if I can
find any shots of the insides, but will try and find them if this is what you
have in mind for you project.</font></strong></div>
<div><font face="Arial" size="2"><strong></strong></font> </div>
<div><font face="Arial" size="2"><strong>Hope this helps.</strong></font></div>
<div><font face="Arial" size="2"><strong>Doug Williams,</strong></font></div>
<div><font face="Arial" size="2"><strong>Fluidyne.</strong></font></div><font face="Arial" size="2">
<div><br><br><br></div></font>
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