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:[email protected] http://www.adelaide.edu.au/directory/paul.harris CRICOS Provider Number 00123M This email message is intended only for the addressee(s) and contains information that may be confidential and/or copyright. If you are not the intended recipient please notify the sender by reply email and immediately delete this email. Use, disclosure or reproduction of this email by anyone other than the intended recipient(s) is strictly prohibited. No representation is made that this email or any attachments are free of viruses. Virus scanning is recommended and is the responsibility of the recipient. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Deepak D. G. Sent: Friday, 1 April 2011 2:01 AM To: [email protected] 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 _______________________________________________ Digestion 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/digestion_lists.bioenergyli sts.org for more information about digestion, see Beginner's Guide to Biogas http://www.adelaide.edu.au/biogas/ and the Biogas Wiki http://biogas.wikispaces.com/ _______________________________________________ Digestion 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/digestion_lists.bioenergylists.org for more information about digestion, see Beginner's Guide to Biogas http://www.adelaide.edu.au/biogas/ and the Biogas Wiki http://biogas.wikispaces.com/
