I have used tire grindings up to 50 or more % mixed with wood chips in my cross draft gasifier for heating purposes. ( not well mixed. Just dumped in a bucket of chips and a bucket of tire grindings from retread plant ) No smoke or odor down wind except of normal smell of a wood gasification boiler. I can't describe it but it is unique and not unpleasant. Charles ---- Tom Miles <[email protected]> wrote: > L Massam, > > Tire gasification is an interesting challenge. Many have tried it over the > years but there are few industrial systems. My favorite project was called > "Tyrolysis" in the Uk in the 1980s. An industrial plant was built (by Foster > Wheeler, Hartlepool) to make oil as a substitute for British heating oil. > The plant failed in a period of high energy prices. > > Another problem is that the tires gasify very quickly so it is difficult to > control the reaction. We have seen several attempts to gasify individual > tires that have failed partly due to the inability to control the rate of > gasification. The rubber heats to the point where is gasifies in an > explosive flash. > > A US passenger tire weighs about 20 lb. (9.07 kg), or 100 tires/ton (.907 > mt). (In the US we generate the equivalent of one tire per person per year > or 308 million per year.) 10 tires would weigh 200 lb (90.7 kg) containing > about 5 MMBtu. That will make an impressive flare if it heats to the point > where it all gasifies in a flash. > > Successful systems seem to use either direct combustion or pyrolysis > (external heating). About 60% of the tires that are recycled in the Eastern > US are burned in combustors or cement kilns. According to the Rubber > Manufacturers Assn, who keeps track of Scrap Tires, the tire derived fuel > market in 2009 was estimated at 2.6 million tons per year. No tire gasifiers > were reported. > (2009 Scrap Tire Market Report, RMA, > https://www.rma.org/getfile.cfm?ID=985&type=publication) > > Most people gasify tire chips rather than whole tires. We gasified (50 mm) > tire chips successfully in a fluidized bed gasifier, but removing the wire > bead is a problem. If it is not removed it will de-fluidize the bed. > > Conrad Industries, in Washington has operated a tire (chip) pyrolysis plant > for many years. > http://www.conradind.com/ > > Casings could probably be coarsely shredded and pyrolyzed if you have a use > for the heat. That way you can more or less meter the fuel into the reactor. > > > Tom Miles > www.gasifiers.bioenergylists.org > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of L MASSAM > Sent: Sunday, August 08, 2010 12:31 PM > To: [email protected] > Subject: [Gasification] Ask a question. > > I am new to all of this and have been following the gasification community > growth for a little while now. I am interested in gasifying whole car tyres, > say 10 per batch. Can someone help me design this machine. I am sure I have > picked up enough info to build the reactor but I need some help with the > distillation process. All help and advice is sought. I have a tyre business > and find that disposing these casings is expensive but furthermore the power > stored within must be vast. > > I am awaiting your soonest responses. > _______________________________________________ > Gasification mailing list > [email protected] > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org > http://gasifiers.bioenergylists.org > http://info.bioenergylists.org > > > > _______________________________________________ > Gasification mailing list > [email protected] > http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org > http://gasifiers.bioenergylists.org > http://info.bioenergylists.org
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