| 摘要 |
PROBLEM TO BE SOLVED: To provide a sludge drying system capable of effectively recovering and using steam generated in a drier, and capable of saving energy of the whole of the system.SOLUTION: A sludge drying system 10 includes a reduced-pressure drier 11 for drying dewatered sludge, a superheated steam drier 12 for drying the dewatered sludge at a drying temperature different from the reduced-pressure drier 11, and a supply pipe passage 17 for supplying the steam generated from the dewatered sludge in the superheated steam drier 12 as a heat source of the reduced-pressure drier 11. Latent heat of the steam in exhaust gas from the superheated steam drier 12 is reused for drying the sludge in the reduced-pressure drier 11, and energy fed for drying the sludge in the superheated steam drier 12 is reused. |
