Tube and apparatus for sampling and analysing of waste gases and installation containing said apparatus

摘要

The sample tube (7) fitted in a discharge conduit for fumes originating especially from a heat treatment or melting furnace, comprises an extraction pipe (8) extending in a closed sleeve (9) comprising an entry (11) and an exit (12) for coolant fluid, the extraction pipe having an end part emerging from the sleeve via an opening (10) for withdrawing the fumes and a connecting part (14) extending out of the sleeve for connection to an analysis circuit comprising a suction pump. The opening (10) is advantageously pointed countercurrentwise to the direction of the travel (F) of the fumes. Application especially to process control in an electrical furnace for steel production with injection of oxygen-containing gas.