Regenerative preheater and method for operating the same

US5275230A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Lothar Balling · Ergolding, DE
• Klaus Huttenhofer · Heroldsberg, DE

Key dates

• Filing date: Mar 4, 1992
• Grant date: Jan 4, 1994
• Expiry date: Mar 4, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D53/8631
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A regenerative preheater includes a heat accumulator and a catalyst through which a raw gas containing a harmful component can flow and through which a clean gas can flow in alternation. A first admission point for a gaseous reagent is disposed upstream of the catalyst in a flow path of the raw gas. A second admission point for the gaseous reagent is disposed upstream of the catalyst in a flow path of the clean gas. A method for operating a regenerative preheater includes passing a raw gas containing a harmful component and passing a clean gas through a heat accumulator and a catalyst in alternation. A a reagent for a catalytic reaction is introduced into both a flow path of the raw gas and a flow path of the clean gas.