General Information
    • ISSN: 2010-0221
    • Frequency: Bimonthly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Dr. Eldin W. C. Lim
    • Executive Editor: Mr. Ron C. Wu
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, CABI, DOAJ, Electronic Journals Library, Google Scholar, Engineering & Technology Digital Library, ProQuest, and Crossref
    • E-mail: ijcea@ejournal.net
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Editor-in-chief
Dr. Eldin W. C. Lim
Dept. of Chemical and Biomolecular Engineering,
National University of Singapore, Singapore
IJCEA 2014 Vol.5(1): 1-5 ISSN: 2010-0221
DOI: 10.7763/IJCEA.2014.V5.340

Mathematical Modeling of Drying of Black Liquor Droplets in Recovery Boilers

S. Ramesh, H. Mahalingam, and N. J. Rao
Abstract—In this paper, the drying of black liquor droplets sprayed into the chemical recovery boiler in a pulp and paper mill is examined. The fate of the droplets in the recovery boiler is generally divided into three consecutive stages i.e., drying, devolatilization and char combustion. Drying refers to the removal of water from the black liquor droplets by upward moving hot gases during its flight in the recovery boiler. When the black liquor is atomized in the hot ambience of the recovery boiler, different sizes of droplets are generated, some of which are not desirable with regard to incomplete drying. This creates problems in operation of the recovery boiler. A simple mathematical model is developed to estimate the travel time from the point of injection to the char bed. Simulations were carried out for various parameters including droplet size and suitable droplet sizes determined for safe and economical boiler operation.

Index Terms—Black liquor, drying, modeling, recovery boiler, droplet size

The authors are with the Department of Chemical Engineering, Jaypee University of Engineering & Technology, A-B Road, Dt. Guna - 473226, M. P., India (tel.: +91 7544 267310; fax: +91 7544 267011; e-mail: hari.mahalingam@juet.ac.in).

[PDF]

Cite: S. Ramesh, H. Mahalingam, and N. J. Rao, "Mathematical Modeling of Drying of Black Liquor Droplets in Recovery Boilers," International Journal of Chemical Engineering and Applications vol. 5, no. 1, pp. 1-5, 2014.

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