The Incinerator Guidebook: A Practical Guide for Selecting ... - SSWM

Annex 3: Specifications for Future WDU Constructions in
Rwanda
Architecture
� Should have primary and secondary combustion chambers.
� Should be of auto-combustion type.
� Should not require auxiliary fuel during medical waste incineration except for warm-up
and burn-down.
� Should not require electricity.
� Refractory IS-6 or higher brick with chemical composition minimum 30% Al2O3 and
maximum 2.5%.
� Fe2O3, rated to 1300°C+, minimum CCC 200 kg/cm 3 , maximum AP 27%, service
temperature PCE.
� 30+, load under temperature RUL 1300°C, and PLC +1%.
� Brick joining mortar should be a combination of high temperature refractory paper and
refractory glue, both rated at over 1100°C.
� All incinerator components including stack should be SS409 or SS309 stainless steel.
� Both primary and secondary combustion chambers should have independent air intakes.
� Incinerator should be equipped with an analog battery-free temperature gauge rated up
to 1300°C.
� Stack should be equipped with an automatic draft-control valve.
� Stack shall not be less than 4 meters high from ground level and 150 mm or more in
diameter.
� Assembly should be possible on site with no power tools or electricity.
Capacity
� Incinerator should be able to tolerate 100% plastic or safety boxes.
� Destruction rate should be over 9 kg per hour for safety boxes or over 7 kg per hour for
50% safety boxes and 50% non-sharps hazardous waste (25% maximum moisture
content).
Performance
� The incinerator must consistently be able to maintain secondary combustion
temperatures of 800°C.
� The resulting ash residue must be less than 5% of the original waste by weight.
� Gas residence time must exceed 1 second.
� Emissions should conform to local environmental standards.
� When operated correctly, emissions should be clear and colorless.
Operator tools and safety equipment
� 2 pairs leather gloves covering wrists.
� 2 pairs shatter-proof eye wear.
� 2 sets half-face particulate mask with activated carbon cartridges.
� First aid kit.
� 1 set rake, shovel, dust pan, brush.
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