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    Crystallization of calcium carbonate and magnesium hydroxide in the heat exchangers of once-through multistage flash (MSF-OT) desalination process

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    Mujtaba_Computers_&_Chemical_Engineering.pdf (851.5Kb)
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    Publication date
    2019-03-04
    Author
    Alsadaie, S.
    Mujtaba, Iqbal M.
    Keyword
    MSF desalination
    Heat exchanger
    Fouling model
    Calcium carbonate
    Magnesium hydroxide
    Solubility product
    Rights
    © 2018 Elsevier Ltd. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    
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    Abstract
    In this paper, a dynamic model of fouling is presented to predict the crystallization of calcium carbonate and magnesium hydroxide inside the condenser tubes of Once-Through Multistage Flash (MSF-OT) desalination process. The model considers the combination of kinetic and mass diffusion rates taking into account the effect of temperature, velocity and salinity of the seawater. The equations for seawater carbonate system are used to calculate the concentration of the seawater species. The effects of salinity and temperature on the solubility of calcium carbonate and magnesium hydroxide are also considered. The results reveal an increase in the fouling inside the tubes caused by crystallization of CaCO3 and Mg(OH)2 with increase in the stage temperature. The intake seawater temperature and the Top Brine Temperature (TBT) are varied to investigate their impact on the fouling process. The results show that the (TBT) has greater impact than the seawater temperature on increasing the fouling.
    URI
    http://hdl.handle.net/10454/16566
    Version
    Accepted Manuscript
    Citation
    Alsadaie S and Mujtaba IM (2018) Crystallization of calcium carbonate and magnesium hydroxide in the heat exchangers of once-through multistage flash (MSF-OT) desalination process. Computers & Chemical Engineering. 122: 293-305.
    Link to publisher’s version
    https://doi.org/10.1016/j.compchemeng.2018.08.033
    Type
    Article
    Collections
    Engineering and Informatics Publications

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