Optical flame monitor in high-temp. reactor - employs wavelength filtering for evaluation of low- and high-pressure flames and dual-wavelength temp. pyrometry

摘要

A fibre-optic bundle (6) with a plane face (8) towards the interior (1) of the reactor (2) is split into branches (9.1 etc.) coupled by cpd. lens systems (10) and optical filters (13) to optoelectronic converters (11). Two are connected to flame-monitoring processors (20) and a safety circuit (21) operating a rapid-closure valve (22) in the O2 supply line (23). Two other converters (11.3, 11.4) supply different wavelength signals to a ratio pyrometer (24) and controller (25) of fuel supply (28). USE/ADVANTAGE - In plants performing partial oxidn. of pulverised fuels or hydrocarbons. High availability and unrestricted technical security are guaranteed by appts. insensitive to contamination.