Converting Waste Agricultural Biomass into a Resource - UNEP

Rice Husk Gasifier
Philippines, Commercial
Crop
Residue
Process
Equipment
Main Product
Rice, Corn and other agriwaste
Husk, corncobs
Gasification
Gasifier Combustor
Heat, fuel
By-Product
Technical and Process Description of Technology:
The ITDI rice hull gasifier combustor has the following major parts:
1. Air delivery system - air is introduced inside the gasifier reactor through
a pipe using an electric centrifugal blower.
2. Reactor body - the reactor contains the rice hull being gasified and
where the gasification reaction occurs. This is made of B.I plate
insulated by ordinary red bricks.
3. Fuel feeding system - the gasifier fuel inlet assembly is located at the
topmost section with reactor, feeding is done by pouring the rice hull
into the reactor. To avoid air leaks, the cover of hopper is tightly locked
after the feeding.
4. Grate and ash removal system - Ash is removed after each batch of
operation. This is done by opening the bottom cover, and pulling out
the grate out of the reactor, and ash residue fall down to the ash can.
To start it up, burn 3 kg of charcoal that will serve as the starter for the
gasifier. Drop the burning charcoal on top of the grate. Make sure that
charcoal is properly scattered through out the grate surface so that fuel will be
evenly burned. For the succeeding batch of operation, burned charcoal is no
longer needed. Dry wood chips and coconut husk can also serve as starter for
combustion.
Main Products:
To date a total of 95 units of ITDI rice hull gasifier combustor have been
installed in different locations around the country, through different
applications such as heat source for palay drying, traditional bakery oven,
citronella extraction, candle making, bagasse processing, noodle toasting,
noodle frying, cornick production, brick & pottery making, micro dressing
plant, and other similar thermal equipment using woodfuel or fuel oil.
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