[Digestion] flame lifting

[Paul Harris]

G'day Deepak et al,

The link just suggested (which has section on flame lift - you don't really
need all the equations) confirms my initial response that the gas speed it
too high, so you either need to reduce the supply pressure (just close the
tap a bit) or reduce the gas jet size (and hence the stove heat output) or
increase the burner hole size to reduce the gas velocity (the last approach
keeps/increases the heat output).

Happy digesting,
HOOROO

Mr. Paul Harris, Room 202 Charles Hawker Building, Faculty of Sciences, The 
University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph    : +61
8 8303 7880      Fax   : +61 8 8303 4386
mailto:paul.harris at adelaide.edu.au  
http://www.adelaide.edu.au/directory/paul.harris

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-----Original Message-----
From: digestion-bounces at lists.bioenergylists.org
[mailto:digestion-bounces at lists.bioenergylists.org] On Behalf Of Deepak D.
G.
Sent: Friday, 1 April 2011 2:01 AM
To: digestion at lists.bioenergylists.org
Subject: Re: [Digestion] flame lifting

Dear listeners,

I would like to consult on a issue of flame lifting.

I have installed 8 floating digesters and all are working well and the 
gas production is also very good.

The only issue I have right now is the flame lifting issue, specially 
with the latest installation. The latest installation, in a village in 
Bali,   has a capacity of 1000 liter gas tank and the distance between 
the structure and the stove is about 20 meters. I used a combination of 
a plastic tube and pvc of equal size and that is 1/2".

I can not get the flame burned immediately above the surface of the 
burner but it is lifting. I have tried the same stove at home in which 
the distance between the  biogas and the  stove is about 8 meters and 
the flame is stable  and not lifting.

Can anybody suggest solutions to this issue? thanks

Rgds,
Deepak


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