Device and method for optical detecting substances contained in waste gases of chemical processes

US7525664B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Ines Dani · Lichtenau, DE
• Wulf Grählert · Dresden, DE
• Volkmar Hopfe
• Gerrit MÄDER · Dresden, DE

Key dates

• Filing date: May 27, 2005
• Grant date: Apr 28, 2009
• Expiry date: May 27, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N21/85
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a device and a method for the optical detection of substances contained in exhaust gases of chemical processes, wherein exhaust gases are conducted all the way through a channel element that forms an optical measuring section; at the channel element there are two flanges, closed off to the ambient area, and at least one window element through which electromagnetic radiation for the optical detection can be directed from a radiation source to a optical detector through the channel element; a purge gas is fed through the flanges into the channel element, whereby with a purge gas led into one of the flanges a closed laminar purge gas flow is to be formed in the bottom area of the interior of the channel element.