MILL TRIAL ON NEW SOOTBLOWER DESIGN AND STRATEGY TO COMBAT PLUGGING IN A RECOVERY BOILER, 2010 TAPPI PEERS Conference

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Massive deposit build-up in recovery boilers will not only reduce the heat transfer efficiency, but may also lead to costly unscheduled shutdowns due to the plugging of the flue gas passages. Deposits accumulated on the leading edge of tube banks have been identified as the main root cause of boiler plugging, especially in the superheater section of a recovery boiler. These are also one of the most difficult deposits to remove with conventional sootblowers. This paper discusses a new sootblower that is designed to increase the effectiveness of deposit removal on the leading edge of boiler banks and the preliminary results of the mill trial conducted in a recovery boiler located in the south east USA. While conventional sootblowers rely only on the brittle break-up mechanism to remove the leading-edge-deposits, the new sootblower design leverages both brittle break-up and debonding mechanisms to effectively remove these deposits.