The project motivation for Billerud Korsnäs Frövi was to keep the duct clear and eliminate the frequent water washing with resultant corrosion. Other benefits, such as elimination of steam consumption of the soot blowers, would be a bonus. An infrasound generator was installed to solve the problem.

First step was to produce a complete acoustic model of the boiler flue system and determine optimum sonic cleaner location, frequency and power level to clean the desired areas.

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