[Digestion] flame lifting

[Deepak D. G.]

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