Method of purifying the exhaust gases from plants for the production of cement clinker

US5219544A · kind A · utility

Assignee

• Krupp Polysius AG · DE

Inventors

• Detlev Kupper · Telgte, DE
• Ludger Brentrup · Oelde, DE
• Wolfgang Rother

Key dates

• Filing date: Dec 20, 1990
• Grant date: Jun 15, 1993
• Expiry date: Dec 20, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E50/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a method of purifying the exhaust gases from plants for the production of cement clinker, in which the filter zone through which the exhaust gases flow contains at least one adsorption stage in which an adsorbent is provided which is suitable for fixing NH.sub.x compounds, heavy metals and/or trace pollutants, at least a proportion of the adsorbent being removed from the adsorption stage at specific intervals of time and introduced into the final burning zone and/or preheating zone. By such a method the NO.sub.x content of the exhaust gases is significantly reduced, and at the same time heavy metals and trace pollutants are eliminated from the exhaust gases.