Bethlehem Steel Corporation

Richard H Krause

Vincent Victor Horvath

Thomas J Pfeiffer

Arthur J Schenck

Production-worthy method and system comprising two computer-based subsystems for determining temperature of an irradiant mass movable through process means in a hostile environment exemplified as coke guide and coke oven in a battery of ovens. System is usable in other industries such as at cement kilns and the like. First subsystem which is carried by a movable coke guide/door machine, includes one or more coke guide pyrometers arranged vertically, each with a sighting window monitor to detect optical errors, an onboard computerized and cooled electronics package for acquiring and processing temperature data and automatically detecting same for pyrometer drift and optical errors, and automatically correcting for these errors, and further including a plug-in portable terminal with a printer. The second subsystem stationed in a central office having a base computer package with various computation and storage capabilities including a CRT control terminal for operator interaction with the entire system, a line printer and a printer/plotter. Two-way data communication between the two subsystems is exemplified by a two-way radio link. Each subsystem logs both coke level data and coke vertical and horizontal temperature profile data and alarm messages. Tabular printouts of temperature and diagnostic data are provided by both the portable terminal printer in the onboard subsystem and the base computer printers. Graphical displays are also provided by the base computer system of coke level, temperature and summary data, oven push schedules and/or self-diagnostic messages of various process and measurement operations.

Method and system for determining mass temperature in a hostile

Coke guide and coke oven infrared pyrometer degrading is minimized to continuously permit better accuracy and reliability in hostile environment of coke mass and heat, dust and/or dirt present in many coke plant areas. These benefits are obtained using production-worthy pyrometer equipment having a purged pyrometer with any of three window cleanliness monitors to determine errors and automatically correcting for same through self-calibration.

Pyrometer with sighting window cleanliness monitor

Repetitive defect signals are produced, for example, by bar or rod inspection equipment whenever any one of plural roll sets in a rolling mill develops a roll crack. Defect signal repetitive rate differs for each roll's relative speed. Selective correlator electronics process the defect signals with plural repetitive rates and produce an output signal indicative of which roll set in the mill has a cracked roll.

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Bethlehem, PA, United States of America

Richard H Krause