Measurements of sootblower jet strength in kraft recovery boilers – Part II: Results of the third and fourth field trials

• Published in: TAPPI Journal
• Main Authors: Tran, honghi, Pophali, Ameya, Nussman, Markus, Miikkulainen, Pasi
• Format: Article in Journal/Newspaper
• Language: English
• Published: TAPPI Press 2012
• Subjects: Canada; Gunnar; Nozzle; Nozzle The; The Nozzle; Wilcox; Peace River
• Online Access: http://hdl.handle.net/1807/98245; https://doi.org/10.32964/tj11.9.31

Two additional field trial studies were conducted in different kraft recovery boilers in Sweden using force-measurement probes to determine the force of sootblower jets under various blowing conditions. The results confirm the findings of previous trials that, at a given distance, the force exerted on a target by a fully expanded sootblower jet increases nearly linearly with an increase in lance pressure. At a given lance pressure, the jet force decreases drastically as the distance between the sootblower nozzle and the target increases. At a distance farther than 1 m from the nozzle, the jet retains less than 10% of its original strength. The studies also show clearly that the size and shape of the target have a significant effect on the force exerted on it by the jet. A flat surface receives a greater force from the jet than a target with an inclined surface. The authors wish to acknowledge the Obbola and Värö mills for providing test sites and help during the trials; YTI Research Centre, Finland for its assistance with probe design and construction; Lars-Gunnar Magnusson of Andritz for his leading role in the collection of field data and Dr. Andrei Kaliazine for his assistance with data analysis. 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 consortium of the following companies: Andritz, Babcock & Wilcox, Boise Paper, Carter Holt Harvey, Celulose Nipo-Brasileira, Clyde-Bergemann, DMI Peace River Pulp, Fibria, International Paper, Irving Pulp & Paper, Metso Power, MeadWestvaco, StoraEnso Research, and Tembec.