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Cold flow velocity measurements in recovery boilers: Part I: Interaction of primary and secondary air flows
Author(s) -
Karidio I.,
Uloth V.,
Markovic C.,
Thorn P.
Publication year - 1997
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450750127
Subject(s) - anemometer , boiler (water heating) , air velocity , airflow , mechanics , boiler blowdown , environmental science , computational fluid dynamics , flow velocity , flow (mathematics) , meteorology , materials science , engineering , inlet , mechanical engineering , waste management , turbulence , physics
Abstract Cold air flow velocities were measured in a commercial recovery boiler during shutdown periods, using hot‐wire anemometers, modified to indicate direction. Five tests were carried out using different primary and secondary air configurations. The conditions tested included arrangements recommended by others to improve gas flow uniformity, as well as unrealistic extremes to be used in the evaluation of computational fluid dynamic models. The measurements demonstrated the inherent unsteadiness of recovery boiler flows and confirmed that balanced air flows through opposed walls result in a central region of high velocity upward flow. Interlacing of the secondary air significantly reduced the peak velocity and flattened the upward velocity profile at the liquor gun level.