Plant for thermal waste disposal and process for operating such a plant

US5669317A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Karl May · Bad Vilbel, DE
• Herbert Tratz · Ottensoos, DE
• Reiner Engelhardt · Effeltrich, DE

Key dates

• Filing date: Feb 20, 1996
• Grant date: Sep 23, 1997
• Expiry date: Feb 20, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/129
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A plant for thermal waste disposal includes a pyrolysis reactor having a first heating device for indirectly heating the waste and a second heating device for directly heating the waste within the pyrolysis reactor. The pyrolysis reactor converts the waste into low-temperature carbonization gas and solid pyrolysis residue. The low-temperature carbonization gas and the solid pyrolysis residue, possibly after passing through a treatment device, are fed to a high-temperature reactor for combustion. The first heating device ensures a basal heating of the waste in the pyrolysis reactor. A separate fuel or waste heat from the flue gas of the high-temperature reactor can serve the purpose of ensuring the basal heating. Supplementary heating is provided as required with the aid of the second heating device by providing an air feed into the interior of the pyrolysis reactor. A process is also provided for operating the plant for thermal waste disposal.