Dear Paul,
Crispin, of course, was speaking in relative terms. If you have a
mechanical "injection" system of some kind, there would probably be
enough motive force to mechanically break up bridging, especially if the
fuel flow is upwards or from the side.
regards,
Ron
P.S. Crispin, this seems quite encouraging. Wondering, however, how they
are dealing with the filtering residues and waste.
On 02.11.2012 06:04, Paul Olivier wrote:
Crispin,
Rice hulls do not flow easily.
They are notorious for bridging.
Paul
On Fri, Nov 2, 2012 at 10:26 AM, Crispin Pemberton-Pigott
<[email protected] <mailto:[email protected]>> wrote:
Dear Gasifying Friends
I just stopped at a rice milling plant that is about 20 km outside
Battambang. It processes about 1.9 tons per hour. It is all flat
belt driven and a lot of it is made of wood.
The power plant is an internal combustion engine of about 200 HP.
It runs on gas. The gas is supplied by a rice hull gasifier at the
back of the building where there is literally a mountain of rice hull.
The gasifier looks quite modern and operates in a way that is
day-and-night continuous. The rice hull is fed into the vertical
reactor by an auger. The reaction zone position is not exactly
constant but is maintained within certain limits.
The ash/char is dropped off the top into a shallow pond to quench it.
I see no reason why a small stove could not be operated in the
same manner: TLUD with episodic feeding from below via a plunger
of some sort. Rice hull flows easily. If the primary air control
is adequate a range of 1 to 4 kW would be perfect.
If anyone is interested I took pictures of the whole gas system
and power plant.
Regards
Crispin at km post 271 outside Battambang
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--
Paul A. Olivier PhD
27C Pham Hong Thai Street
Dalat
Vietnam
Louisiana telephone: 1-337-447-4124 (rings Vietnam)
Mobile: 090-694-1573 (in Vietnam)
Skype address: Xpolivier
http://www.esrla.com/
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