Two-stage static dryer for converting organic waste to solid fuel
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United States of America Patent
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Apr 10, 2012
Grant Date -
May 27, 2010
app pub date -
Nov 25, 2008
filing date -
Nov 25, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An energy-efficient method and apparatus for drying pelletized, moist organic material is described. The method consists of a rapid, high temperature static drying process in a shallow bed, followed by traditional vertical static drying in a deep bed. Hot exhaust gas from the shallow-bed, hot-temperature static dryer is then recirculated to provide thermal energy to the deep-bed, warn-temperature static dryer. This invention can be used to convert wet, organic waste materials such as animal and poultry waste, municipal wastewater sludge, urban post-consumer food waste, or manufactured food byproducts and residuals into solid fuel.
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