In-situ measurements of sootblower jet impact in a recovery boiler

• Published in: TAPPI Journal
• Main Authors: Saviharju, Kari, Kaliazine, Andrei, Tran, Honghi, Habib, Tony
• Format: Article in Journal/Newspaper
• Language: English
• Published: TAPPI Press 2011
• Subjects: Canada; Gunnar; Nozzle; Nozzle The; Pacific; Platen; The Nozzle; Wilcox; Peace River
• Online Access: http://hdl.handle.net/1807/98247; https://doi.org/10.32964/tj10.2.27

Two mill trials were conducted in a recovery boiler at a kraft mill in Sweden using a force measure - ment probe to examine the performance of a sootblower under different blowing conditions. The results show that at a given distance, the force produced by the sootblower jet increases almost linearly with an increase in lance pres - sure. At a given lance pressure, the jet force decreases rapidly as the distance increases, retaining less than 10% of its original strength at a distance beyond 1 m from the nozzle. The results also suggest that flue gas temperatures in the vicinity of the sootblower have an insignificant effect on sootblower performance, and that the sootblowing jet force exerted on a tube target can fluctuate widely, particularly at a close distance. Force fluctuations are caused mainly by the vibration of the target as it is struck by the jet. The change in jet strength is caused by platen swinging and the tremor of the system that holds the target. The authors also wish to acknowledge Tero Karttunen and Markku Tanttu of YTI Research Centre for their assistance with probe design and construction of the probe, together with Lars-Gunnar Magnusson of Andritz, for their leading role in the collection of field data. Thanks also due to the SCA Ob - bola mill for providing the test site and help during the trials. This work was conducted as part of the research program on “Increasing Energy and Chemical Recovery Efficiency in the Kraft Process,” jointly supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) and a con - sortium of the following companies: AbitibiBowater, Alstom Power, Andritz, Babcock & Wilcox, Boise Paper Solutions, Carter Holt Harvey, Celulose Nipo-Brasileira, Clyde-Berge - mann, Diamond Power International, Domtar, DMI Peace River Pulp, Fabria, Georgia Pacific, International Paper, Irving Pulp & Paper, Metso Power, MeadWestvaco, StoraEnso Re - search, and Tembec.