Conforma Clad Case Studies

Customer Experience – Eroding Fan BladesThe challenge: One of the largest producers of telephone directory and lightweight coated papers in North America requires a sizable energy supply for its mill. Some of the power is produced internally with a hog-fueled steam power boiler. Induced draft (ID) fans pull erosive flue gases from the boiler through the precipitator, where fly ash and other damaging materials are removed. ID fans have a 10 ft. diameter fan wheel with inlets on both sides, as well as 10 forward-facing curved fan blades.

The outer portions of the blades experienced extreme wear caused by the highly erosive, high-velocity fly ash. Severe erosion creates unbalanced vibrations, which cause the fan to trip. A failure can result in boiler fuel costs of $80,000 per day and can slow down paper production.

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