Process and plant for mechanical and thermal dewatering of sludges

US6161305A · kind A · utility

Assignee

• Andritz-Patentverwaltungs-Gesellschaft m.b.H. · AT

Inventors

• Christian Maier · Kettenham, DE
• Erwin Brunnmair · Graz, AT

Key dates

• Filing date: Feb 24, 1999
• Grant date: Dec 19, 2000
• Expiry date: Feb 24, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F26B7/00
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A process and apparatus for mechanical and thermal dewatering of solid-liquid mixture, particularly industrial and sewage sludges, feeds the sludge to a dewatering device to produce a dewatered material which is then dried in a thermal drier. The dewatered sludge is reduced to a granulate-like structure without any intermediate stage and is then dried immediately afterwards. An apparatus for implementing the process includes a mechanical dewatering device being directly connected to a feed unit to produce a granulate-like structure and which is permanently connected to the thermal drier.