Patent · US Active

Two-stage static dryer for converting organic waste to solid fuel

US8151482B2 · kind B2 · utility

8Cited by
112References
4Claims
0Family size

Inventors

Key dates

Filing dateNov 25, 2008
Grant dateApr 10, 2012
Priority date—
Expiry dateSep 11, 2030

Classification

  • Technology area (CPC F)Mechanical Engineering; Lighting; Heating
  • CPC primaryF26B2200/18
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.