[Stoves] Extended use of TLUDs Re: [biochar] UsedTractors...biochar on homestead

[Josh Kearns]

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 <kchisholm at ca.inter.net> wrote:

> **
> Dear Robert
>
> ----- Original Message -----
> *From:* Robert Taylor <rt at ms1.hinet.net>
> *To:* Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
> *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 <kchisholm at ca.inter.net>
> *To:* Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
> *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 <dlevine at speakeasy.net>
> *To:* Discussion of biomass cooking stoves<stoves at lists.bioenergylists.org>
> *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{)
>
> --
>
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> Niccolo Machiavelli
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>
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-- 
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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