Method and apparatus for off-gas composition sensing

G - Physics – 01 – N

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G01N 21/39 (2006.01) G01N 21/31 (2006.01)

Patent

CA 2309217

An apparatus and method for non-intrusive collection of off-gas data in a steelmaking furnace (100) includes structure and steps for transmitting a laser beam (300) through the off-gas produced by a steelmaking furnace, for controlling the transmitting to repeatedly scan the laser beam through a plurality of wavelengths in its tuning range, and for detecting (400) the laser beam transmitted through the off-gas and converting (600) the detected laser beam to an electrical signal. The electrical signal is processed to determine characteristics of the off-gas that are used to analyze and/or control the steelmaking process.

L'invention concerne un appareil et un procédé de collecte discrète de données relatives à des gaz résiduels dans un four (100) de production d'acier comprenant une structure et caractérisés par la transmission d'un faisceau laser (300) à travers le gaz résiduel produit par un four de production d'acier, la régulation de la transmission afin de faire passer de manière répétée le faisceau laser en balayage sur une pluralité de longueurs d'ondes dans sa gamme d'accord, et la détection (400) du faisceau laser transmis à travers le gaz résiduel ainsi que la conversion (600) du faisceau laser détecté en un signal électrique. Le signal électrique est traité afin de déterminer les caractéristiques du gaz résiduel que l'on utilise pour analyser et/ou réguler le processus de production d'acier.

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