Is a fluidized bed considered to be horizontal? Just thought that might be what they had in mind.
Best regards, Dan Sent from my iPhone On Jul 31, 2012, at 1:45 PM, "doug.williams" <[email protected]> wrote: > Hi Jai, > You ask: > > 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. > > 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. These are not suitable for raw fuels. > > 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"). > 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. > > 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. > > 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. > > I suggest you read up on charcoal gasification before you build anything, but > it is hard to fail when the fuel is just charcoal. > You can see an old one from WW2 on the Fluidyne Archive > www.fluidynenz.250x.com 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. > > Hope this helps. > Doug Williams, > Fluidyne. > > > > _______________________________________________ > Gasification mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/
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