Near-IR optical process sensor for electric arc furnace pollution control and energy efficiency

Jason J. Nikkari; Murray J. Thomson

doi:10.1117/12.417390

13 February 2001 Near-IR optical process sensor for electric arc furnace pollution control and energy efficiency

Jason J. Nikkari, Murray J. Thomson

Proceedings Volume 4201, Optical Methods for Industrial Processes; (2001) https://doi.org/10.1117/12.417390
Event: Environmental and Industrial Sensing, 2000, Boston, MA, United States

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.

Citation Download Citation

Jason J. Nikkari and Murray J. Thomson "Near-IR optical process sensor for electric arc furnace pollution control and energy efficiency", Proc. SPIE 4201, Optical Methods for Industrial Processes, (13 February 2001); https://doi.org/10.1117/12.417390

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