Influence of operating conditions on particulate fouling

Authors

  • H. Müller-Steinhagen,

    1. Department of Chemical Engineering, University of British Columbia, Vancouver, B.C., Canada V6T 1W5
    Current affiliation:
    1. Department of Chemical & Materials Engineering, University of Auckland, New Zealand
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  • F. Reif,

    1. Department of Chemical Engineering, University of British Columbia, Vancouver, B.C., Canada V6T 1W5
    Current affiliation:
    1. Department of Mechanical Engineering & Mechanics, University of Karlsruhe, West Germany
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  • N. Epstein,

    1. Department of Chemical Engineering, University of British Columbia, Vancouver, B.C., Canada V6T 1W5
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  • A. P. Watkinson

    1. Department of Chemical Engineering, University of British Columbia, Vancouver, B.C., Canada V6T 1W5
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  • Based on paper presented at Symposium on Fouling of Heat Exchangers, 36th Canadian Chemical Engineering Conference, Sarnia, October 5-8, 1986

Abstract

The influence of flow velocity and particle size on the deposition of suspended alumina particles onto heat transfer surfaces was measured with two fouling probes, namely, a heated cylindrical rod in an annulus and a coiled wire in crossflow. Additionally, the response of the fouled probes to such changes as may occur in operating heat exchangers was investigated. The measured influence of flow velocity, wall temperature, bulk temperature, heat flux, particle concentration and particle size on the fouling behaviour as described in this paper and in a companion paper is compared to the predictions of several fouling models from the literature, and recommendations are made for further improvement of these models.

Abstract

On a mesuré l'influence de la vitesse d'écoulement et de la taille des particules sur le dépôt de particules d'alumine en suspension sur des surfaces de transfert de chaleur a I'aide de deux sondes d'encrassement, à savoir une tige cylindrique chauffée située dans un espace annulaire et un fil en spirales dans un écoulement transversal. De plus, on a étudié la réponse de ces sondes à des changements comparables à ceux qui peuvent se produire au cours du fonctionnement d'échangeurs de chaleur. On a comparé I'influence de la vitesse d'écoulement, de la température des parois, de la température dans le fluide, du flux de chaleur, de la concentration et de la taille des particules sur le phénomène d'encrassement d'écrite dans cette étude et dans un travail complémentaire, aux prédictions de plusieurs modéles d'encrassement publiés, et on fait des suggestions pour l'amélioration de ces modéles.

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