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Proceedings Paper

In-line particle measurement in a recovery boiler using high-speed infrared imaging
Author(s): Sami Siikanen; Pasi Miikkulainen; Marko Kaarre; Mikko Juuti
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Paper Abstract

Black liquor is the fuel of Kraft recovery boilers. It is sprayed into the furnace of a recovery boiler through splashplate nozzles. The operation of a recovery boiler is largely influenced by the particle size and particle size distribution of black liquor. When entrained by upwards-flowing flue gas flow, small droplet particles may form carry-over and cause the fouling of heat transfer surfaces. Large droplet particles hit the char bed and the walls of the furnace without being dried. In this study, particles of black liquor sprays were imaged using a high-speed infrared camera. Measurements were done in a functional recovery boiler in a pulp mill. Objective was to find a suitable wavelength range and settings such as integration time, frame rate and averaging for the camera.

Paper Details

Date Published: 18 May 2012
PDF: 6 pages
Proc. SPIE 8354, Thermosense: Thermal Infrared Applications XXXIV, 83540M (18 May 2012); doi: 10.1117/12.916146
Show Author Affiliations
Sami Siikanen, VTT Technical Research Ctr. of Finland (Finland)
Pasi Miikkulainen, Andritz Oy (Finland)
Marko Kaarre, VTT Technical Research Ctr. of Finland (Finland)
Mikko Juuti, VTT Technical Research Ctr. of Finland (Finland)

Published in SPIE Proceedings Vol. 8354:
Thermosense: Thermal Infrared Applications XXXIV
Douglas Burleigh; Gregory R. Stockton, Editor(s)

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