Process of treating residues obtained by purification of exhaust gas

US5092929A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Harald Sauer · Frankfurt am Main, DE
• Bernd Thone · Friedberg, DE

Key dates

• Filing date: Aug 16, 1989
• Grant date: Mar 3, 1992
• Expiry date: Aug 16, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S106/01
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

For a treatment of the residues which become available as dry dust in the purification of exhaust gas and contain, inter alia, 5 to 12% by weight CaO and have a conductance in excess of 6000 .mu.S/cm, a process is proposed in which the residues are fluidized with purified exhaust gas in a circulating fluidized bed system consisting of a fluidized bed reactor, separator and recycling line and the CaO contained in the residues is reacted with the CO.sub.2 contained in the exhaust gases to form CaCO.sub.3.