Importance

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Abstract

An anti-slagging apparatus for a furnace viewing system removes slag build up deposited on a closed circuit television camera lens tube by occasionally releasing a blast or large volume of air through specially designed ports surrounding the tube containing a furnace viewing lens system. The anti-slagging apparatus comprises a double walled cylindrical tube extending through a wall of a furnace for housing a lens tube assembly. An end plate is positioned at the furnace end of the tube and has formed therein a plurality of ports or openings, with each port being directed outwardly at a 30.degree. angle with respect to the axis of the tube assembly into the furnace and with each port being connected to the space formed between the double walled tube. A source of air is provided to the ports from a supply tank, which in turn is connected to a source of air pressure, such as a compressor, or a shop supply. A quick acting, high volume solenoid valve connects the air tank to the tube. When the valve is opened, a high volume of air, in the order of 1610 scfm, passes through the ports to remove the slag or other debris. An adjustable timer controls the opening of said valve, with the valve normally being opened for 1 to 2 seconds at 1 to 10 minute intervals to provide the sudden release of a large quantity of air from the tank into the ports.

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First Claim