[Digestion] Biogas Flashback, does it really happen?

[David Fulford]

Hello Mark,

The only occurrence about which I have heard is of
a  very  old  Indian  KVIC  design,  which  used a
counter-balanced    drum.   The   idea   was  that
sub-atmospheric  pressure allowed more gas to come
from  the slurry, but the extra gas was all carbon
dioxide.  The  idea  also allowed air to enter the
drum. An over-enthusiastic local farmer opened the
gas  valve in the top of the drum and lit the gas.
The  floating  drum  took  off,  as  the gas in it
exploded.

The  only  result  was  that  a group of important
visitors got cattle dung slurry all over them.

Actually  biogas  is  quite  difficult  to ignite.
Normal  spark  ignitors do not work well, you need
one with a gas bottle which produces a flame. 

-- 
Best regards,
 David
  mailto:davidf at kingdombio.com

Thursday, August 2, 2012, 11:29:45 PM, you wrote:

> Hi folks,
> I have been wondering if it is really possible to blow up a digester,
> has any one actually ever seen this happen?
> There is very little info on the web about this subject except boring
> hype from flame and flashback arrestor manufactures.
> Mark



> _______________________________________________
> Digestion mailing list

> to Send a Message to the list, use the email address
> Digestion at bioenergylists.org

> 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/



   ********************************************************************
Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5 4PU
d.j.fulford at btinternet.com, Tel: +44(0)118 326 9779 Mob: +44(0)7746 806401
Kingdom Bioenergy Ltd, www.kingdombio.com, davidf at kindombio.com
                                 Skype Identity: djfulford