Greetings Jeff, Les, and list members.
Can I point something out here ? Les I understand your concerns BUT, the gas content in a gasifier is only what is currently available at the hearth / reduction throat area, and volumetrically about 1/1000 of 1% of the overall tanks volume, IF a tank failed, the gas creation reaction would instantly cease (because of the feedstock being open to air), so yes, even though we think that the entire tank is filled with woodgas, in actuality, it is not. During design and R & D of many units I've built, I have yet had a rupture of any sort, I've had tons of "Puff backs" (as Mike LaRosa calls them), but never a catastrophic failure of a vessel in downdraft gasifier operation. even a tin can will withstand most gasifier puffs, they are very fast events, though noisy, they do NOT last long. BUT I will ALSO say this..... EVERY unit I build has 2 forms of safety valve, just in case.......... Even the best plans, can be influenced by Murphy and his Law, and I simply do NOT what to go there, ever..... Greg Manning, -----Original Message----- From: [email protected] [mailto:[email protected]]on Behalf Of Jeff Davis Sent: Sunday, July 25, 2010 10:16 PM To: Discussion of biomass pyrolysis and gasification Subject: Re: [Gasification] Can't get to blue flare {DougW] Les, What is safer - a tank that is strong but will go off with a bang (so to speak) or a weak tank that would rupture easily? Assuming the safety relief scheme fails. Thanks, Jeff On Sun, 2010-07-25 at 16:27 -0700, Les Freeman wrote: > I worked for 7 yrs in a tank > manufacturing company and have seen many failures and their results -- ________________________________________________ www.puffergas.com Sent from any port in the storm via Acer netbook & Ubuntu Remix. _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3025 - Release Date: 07/25/10 13:36:00 _______________________________________________ Gasification mailing list [email protected] http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org http://gasifiers.bioenergylists.org http://info.bioenergylists.org
