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Proceedings Paper

Near-IR optical process sensor for electric arc furnace pollution control and energy efficiency
Author(s): Jason J. Nikkari; Murray J. Thomson
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Paper Abstract

12 An optical near-IR process sensor for electric arc furnace pollution control and energy efficiency has been proposed. A near-infrared laser has performed simultaneous in-situ measurements of CO (1577.97 nm), H2O (1577.8 nm and 1578.1 nm) and temperature in the exhaust gas region above a laboratory burner fueled with methane and propane. The applicable range of conditions tested is representative of those found in a commercial electric arc furnace and includes temperatures from 1250 - 1750 K, CO concentrations from 0 to 10% and H2O concentrations from 3 to 27%. Two- tone frequency modulation was used to increase the detection sensitivity. An analysis of the method's accuracy has been conducted using 209 calibration and 105 unique test burner setpoints. Based on the standard deviation of differences between optical predictions and independently measured values, the minimum accuracy of the technique has been estimated as 36 K for temperature, 0.47% for CO and 3.4% for H2O. This accuracy is sufficient for electric arc furnace control. The sensor's ability to non-intrusively measure CO and temperature in real time will allow for improved process control in this application.

Paper Details

Date Published: 13 February 2001
PDF: 9 pages
Proc. SPIE 4201, Optical Methods for Industrial Processes, (13 February 2001); doi: 10.1117/12.417390
Show Author Affiliations
Jason J. Nikkari, Univ. of Toronto (Canada)
Murray J. Thomson, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 4201:
Optical Methods for Industrial Processes
Stuart Farquharson, Editor(s)

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