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Proceedings Paper

A Remote Sensing Technique For Combustion Gas Temperature Measurement In Black Liquor Recovery Boilers
Author(s): S R Charagundla; H G Semerjian
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Paper Abstract

A remote sensing technique, based on the principles of emission spectroscopy, is being developed for temperature measurements in black liquor recovery boilers. Several tests have been carried out, both in the laboratory and at a number of recovery boilers, to characterize the emission spectra in the wavelength range of 300 nm to 800 nm. These tests have pointed out the potential for temperature measurements using the line intensity ratio technique based on a pair of emission lines at 404.4 nm and 766.5 nm observed in the recovery boiler combustion zone; these emission lines are due to potassium, a common constituent found in all the black liquors. Accordingly, a fiber optics based four-color system has been developed. This in-situ, nonintrusive temperature measurement technique, together with some of the more recent results, is described in this paper.

Paper Details

Date Published: 23 October 1986
PDF: 8 pages
Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); doi: 10.1117/12.938804
Show Author Affiliations
S R Charagundla, National Bureau of Standards (United States)
H G Semerjian, National Bureau of Standards (United States)

Published in SPIE Proceedings Vol. 0665:
Optical Techniques for Industrial Inspection
Paolo G. Cielo, Editor(s)

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