Probly not "developing world" applicable, but when you have to torch-cut a leaking underground fuel storage tank out of the ground you pile in a bunch of dry ice (solid CO2).
JK On Wed, Oct 24, 2012 at 7:42 PM, Kevin <[email protected]> wrote: > ** > Dear Robert > > ----- Original Message ----- > *From:* Robert Taylor <[email protected]> > *To:* Discussion of biomass cooking stoves<[email protected]> > *Sent:* Wednesday, October 24, 2012 8:44 PM > *Subject:* Re: [Stoves] Extended use of TLUDs Re: [biochar] > UsedTractors...biochar on homestead > > If the tank is ostensibly empty, why not just unscrew the valve, poke in > the end of a hose through the opening, and fill it up with water? > > # That will get rid opf propane vapor. However, > 1: It is a nuisance, to fill with water, and then dispose of it. > 2: There may still be a oil film on the walls of the tank, that the water > flush does not remove. > > Best wishes, > > Kevin > > Robert Taylor > > ----- Original Message ----- > *From:* Kevin <[email protected]> > *To:* Discussion of biomass cooking stoves<[email protected]> > *Sent:* Thursday, October 25, 2012 7:04 AM > *Subject:* Re: [Stoves] Extended use of TLUDs Re: [biochar] Used > Tractors...biochar on homestead > > Dear David > > Good point!! To ensure that the tank is free of propane, simply duct tape > a piece of garden hose, or a pipe that will fit in the valve opening, to a > hair drier. Then turn on the fan for about an hour. No heat is necessary. > > A secondary hazard may exist if there are hydrocarbon liquids inside the > tank. When the heat from a cutting torch or grinder contacts them, they can > also generate explosive gases. Heat the "area to be cut" without making > penetration, while leaving the fan running, and then complete the cut. This > should be safe. > > Best wishes, > > Kevin > > ----- Original Message ----- > *From:* David G. LeVine <[email protected]> > *To:* Discussion of biomass cooking stoves<[email protected]> > *Sent:* Wednesday, October 24, 2012 7:10 PM > *Subject:* Re: [Stoves] Extended use of TLUDs Re: [biochar] Used Tractors > ...biochar on homestead > > On 10/23/2012 01:21 AM, Su Ba wrote: > > I was just given some discarded propane tanks of various sizes. I plan to > have a friend, who is welder, cut them up and see what we can come up with > for a stove. My requirements for a stove is that it has to be easy for me > to use, cost not too much, and last longer than they do now. > > ...Su Ba > > Warning: Propane tanks can explode or flare if cut without fully emptying > them. It is wise to open the valve for a week or two in hot, bright > sunlight, or fill the tank with non-flammable gasses (CO2, Argon, etc.) to > prevent such problems for the first cut. Remove the valves, if you can. > > Dave 8{) > > -- > > *"The first method for estimating the intelligence of a ruler is to look > at the men he has around him."* > Niccolo Machiavelli > > * NOTE TO ALL: > When forwarding emails, please use only "Blind Carbon Copy" or "Bcc" for > all recipients. Please "delete" or "highlight & cut" any forwarding history > which includes my email address! It is a courtesy to me and others who may > not wish to have their email addresses sent all over the world! Erasing the > history helps prevent Spammers from mining addresses and viruses from being > propagated. * > > THANK YOU! > > ------------------------------ > > _______________________________________________ > 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://www.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://www.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://www.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://www.bioenergylists.org/ > > > -- Josh Kearns PhD Candidate Environmental Engineering Engineering for Developing Communities University of Colorado-Boulder Director of Science Aqueous Solutions www.aqsolutions.org Mobile: 720 989 3959 Skype: joshkearns
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