In-process demonstration of lime temperature measurement using laser induced fluorescence

Peter C. Ariessohn; Kelle R. Vigeland

doi:10.1117/12.35058

1 October 1990 In-process demonstration of lime temperature measurement using laser induced fluorescence

Peter C. Ariessohn, Kelle R. Vigeland

Proceedings Volume 1375, ICALEO '89: Optical Sensing and Measurement; (1990) https://doi.org/10.1117/12.35058
Event: ICALEO89, 1989, Orlando, FL, United States

Abstract

A novel technique has been developed for measuring the temperature of the calcium oxide product inside an operating industrial lime kiln. In this technique trace quantifies of a rare earth element are incorporated into the product causing it to exhibit strong fluorescence under ultraviolet excitation. The decay time constant of this fluorescence which is strongly temperature dependent serves as a measure of product ternperature. The spectral and temporal characteristics of the fluorescence of several rare earths have been studied over a temperature range of 800 to 1150C which is the range of interest in an operating kiln. This workhasled totheselectionofpraseodyrnium asthernostsuitable rareearthelementand to the development of techniques to permit temperature measurements to be performed with an accuracy of approximately at rare earth concentrations in the parts per million range. A prototypesensoremployingthisfluorescencetechnique hasbeen used successfully to make measurements of lime temperature in an operating kiln. These measurements are in good agreement with simultaneous thermocouple measurementsoflimetemperatureand providethe firstaccurate in-situ measurementof lime kiln product temperature which can be made on a continuous basis.

Citation Download Citation

Peter C. Ariessohn and Kelle R. Vigeland "In-process demonstration of lime temperature measurement using laser induced fluorescence", Proc. SPIE 1375, ICALEO '89: Optical Sensing and Measurement, (1 October 1990); https://doi.org/10.1117/12.35058

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available