Method and device for scrubbing flue gases

US5811066A · kind A · utility

Assignee

• STEAG GmbH · DE

Inventors

• Hermann Winkler · Recklinghausen, DE
• Marion Neumann · Grafenau, DE

Key dates

• Filing date: May 16, 1997
• Grant date: Sep 22, 1998
• Expiry date: May 16, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/64
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In the method of scrubbing flue gases, the flue gases are wet-scrubbed in the presence of activated carbon. The activated carbon is separated from a suspension resulting from wet scrubbing. The activated carbon is then divided into a first and a second portion, and the first portion is thermally desorbed. The first portion of the activated carbon is returned to the second portion of the activated carbon. The first and second portions of the activated carbon are recirculated to the wet scrubbing step. The device for scrubbing flue gases includes a flue gas desulfurization scrubber with a flue gas inlet line, a flue gas outlet line, and an adsorption medium line. A treatment device for treating a suspension formed in the flue gas desulfurization scrubber is provided. A thermal desorption device for the activated carbon is provided. The treatment device includes a separator for separating solid material from the suspension. The treatment device further includes a flotation device having a gypsum outlet and an activated carbon outlet. The activated carbon outlet is connected to the adsorption medium line and to the thermal desorption device.