I have developed an incinerator that i believe is carbon neutral. It runs on firewood and attains 2000 oC.It actually runs on firewood and can burn even wet material. I think it is also based on pyrolysis principle. When i was in India, we developed the charcoal making unit based exactly on what u have described below David G. Levine Regards, Musungu Wycliffe. Reecon, Kenya.
----- Original Message ----- From: [email protected] To: "Discussion of biomass cooking stoves" <[email protected]> Sent: Friday, May 31, 2013 11:39:18 AM Subject: Re: [Stoves] Char retort question [Default] On Fri, 31 May 2013 00:30:27 -0400,"David G. LeVine" <[email protected]> wrote: >Let me start with "This is something I think I remember seeing." > >Given a mass of biological matter (no, I don't care if it is twigs, >grass or tree stumps), put it in a horizontal 55 gallon drum with a band >clamped head and a pipe from the top of the head down and under the drum >with holes in the pipe which is parallel to the drum. Once filled >(maybe not full either), a fire is started with scraps until the gasses >coming out of the pipe burn. This means the heating becomes self >sustaining and the carbon is unlikely to be vaporized, but the gasses >driven off are used, not wasted. Suddenly the pollution is reduced and >the efficiency goes up. > >1. Does this ring a bell in anyone else's mind? > >2. Does this sound like a viable approach? Yes it's the system originally developed by Lurgi for coal pre WW2 and has been revived many times, in England Robbie Webster promoted it about 10 years ago and I suspect the Adam Retort uses a similar feedback path. The limitation is the poor surface area through which the heat can pass, not a big problem with dry wood. It is viable but think of the timeline of how pyrolysis develops, the offgas does not evolve evenly and its calorific value changes during the process, this tends to mean most of the heat from the offgas is happening after the main charge is carbonised. Yury Yudkevitch addressed this problem by having a series of cylinder retorts feeding a central offgas manifold which then heated the "oven" space in which the cylinders sat, removing cyclinc=ders and replacing with fresh in a batch sequence. AJH _______________________________________________ Stoves 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/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/ _______________________________________________ Stoves 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/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
