Converting Waste Agricultural Biomass into a Resource - UNEP

The burner pipe has forty-four holes of diameter 10 mm drilled into it in four
rows, through which secondary air flows in, for combustion of the producer
gas. To reduce heat losses, the surfaces above and below the secondary air
holes are insulated with rockwool and clad with 1 mm thick GI sheet.
The gas burner base is insulated with a 2 cm layer of refractory cement
(Castable 13) on its entire inner surface. The insulation reduces heat loss
from the gases as they exit the reaction chamber before their combustion in
the gas burner. Asbestos gaskets are used in the assembly of the individual
components together. Three gaskets, of size 28cm x 28cm, 17.5cm x 12cm
and 17cm x 20cm (outer dimensions), are used for connecting the fuel
chamber, primary air inlet and the gas
burner respectively, to the reaction chamber.
Fuel Characteristics: The gasifier stove is reasonably versatile in terms of the
types of fuels it can handle. Ricehusk briquettes, wood chips and coconut
shells were tested and found to be suitable for use in the gasifier stove.
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