[Stoves] Fabricated Burn Barrel TLUDS

Anand Karve adkarve at gmail.com
Sat Sep 29 18:37:04 PDT 2012


Dear Tom,
our charring kilns are used primarily for light biomass such as dried
leaves, paper waste, cardboard, threshing floor debris, pine needles,
straw, etc. This material is too light to be transported to a central
charring unit. Therefore the user takes the kilns to the place where the
biomass is lying. A kiln accepts about 6 kg of such waste and takes about
15 minutes to char it. Since these are portable units, we dont bother to
get any useful heat out of them. The material is not packed into the
barrels, as it would obliterate the air flow. It is placed only lightly
inside the barrel. If the operator finds that the material is obliterating
the primary air, we advice him to reduce the quantity of material placed in
the barrel.
Yours
A.D.Karve

On Sat, Sep 29, 2012 at 9:16 PM, Tom Miles <tmiles at trmiles.com> wrote:

>  AD, Paul, Kobus and others. Many thanks for the suggestions. ****
>
> ** **
>
> What is the largest practical size (kg fuel/hr, kW) for a single TLUD with
> a clean stack for heat recovery? There must be a limit to the air
> penetration to get a clean gas burn form a natural draft stack or even a
> fan driven TLUD. ****
>
> ** **
>
> Tom ****
>
> ** **
>
> *From:* stoves-bounces at lists.bioenergylists.org [mailto:
> stoves-bounces at lists.bioenergylists.org] *On Behalf Of *Anand Karve
> *Sent:* Friday, September 28, 2012 11:22 PM
> *To:* Discussion of biomass cooking stoves
> *Subject:* Re: [Stoves] Fabricated Burn Barrel TLUDS****
>
> ** **
>
> Dear Tom,****
>
> we regularly supply charring kilns made out of used 55 gallon drums. The
> kilns are based on the TLUD principle. The cost of a kiln plus an extra
> barrel for storing the char, is about US$100. We have sold more than 100
> such kilns in India and have also trained a number of persons from India
> and Africa. These kilns are so easy to manufacture, that we ask the
> trainees to photograph and take measurements of our kiln so that they can
> copy the design. In many instances, people buy a kiln from us, because they
> feel that their local fabricator would be better able to copy the design
> from an actual object than from a blue print or a photograph.****
>
> The advantage of using 55 gallon drums is that used drums are available at
> a relatively low cost, and the kilns are portable. Instead of transporting
> the biomass, one transports the kiln to the location where the biomass is
> available, and brings back only the charred material, which weighs only a
> third as much as the biomass.  ****
>
> Yours****
>
> A.D.Karve****
>
> On Fri, Sep 28, 2012 at 11:42 PM, Tom Miles <tmiles at trmiles.com> wrote:***
> *
>
> Am often asked if there is a burn barrel sized TLUD that is commercially
> fabricated. We’ve seen some great DIY with Doug’s Jolly Roger and others.
> Is anyone fabricating a 55 gal drum sized TLUD that can be used for regular
> biochar production? If so, what is the cost and availability?****
>
>  ****
>
> Thanks****
>
>  ****
>
> Tom Miles  ****
>
>
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>
>
>
> --
> ***
> Dr. A.D. Karve
> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>
> ****
>
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-- 
***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
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