Waste treatment autoclave to provide for steam - assisted drying
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United States of America Patent
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Issued Date -
Jun 3, 2010
app pub date -
Dec 1, 2008
filing date -
Dec 1, 2008
priority date (Note) -
Abandoned
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Abstract
An autoclave system provides a means of sterilizing municipal solid waste, hydrolyzing many of its components, and preparing the material for post-autoclave automated separations. The present apparatus provides a means of drying the solid waste in the vessel, while conserving the energy used to dry the vessel. Non-contact steam is recovered through separations of steam and water, with condensate steam pressure regenerated by mechanical vapor recompression and condensate water returned to the boiler/steam generator. Heat transfer to combustion air, by heat transfer via heat pump to generate additional steam, and/or by mechanical vapor recompression recovers the latent heat of loose contact steam condensate. The process design provides for in-vessel drying while reducing the energy cost of operating a waste autoclave, as compared to the current art.
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