2021 Nashville AISTech

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Review of Centrifugal Fan Design Decisions Over the Past 25 Years of Operation (Room 207 A)

29 Jun 21
2:30 PM - 3:00 PM

Tracks: Environmental: Emissions Control II

This paper reviews the design and operational decisions that were made in 2005 during the replacement of a double-width, double-inlet 75-inch-diameter, 9,000 lb., dual-speed, centrifugal fan wheel for a Q-BOP blast furnace due to excessive cracking in the wheel. The original centrifugal fan showed excessive cracking after 10 years of speed cycling duty. The replacement fan has been operating for more than 10 years and shows no signs of fatigue cracking. This paper reviews the original analysis, decisions by the plant personnel and evaluates the process against a present-day analysis.