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International Heat Transfer Conference 7

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

MULTICOMPONENT HEAT AND MASS TRANSFER IN DEPHLEGMATORS WITH COILED TUBE BUNDLES

G. Sandtner
Linde Aktiengesellschaft, Werksgruppe TVT Munchen 8023 Hollriegelskreuth, Federal Republic of Germany

M. Muller-Deck
Linde Aktiengesellschaft, Werksgruppe TVT Munchen 8023 Hollriegelskreuth, Federal Republic of Germany

DOI: 10.1615/IHTC7.2630
pages 439-446

Abstract

Dephlegmation (countercurrent condensation), implemented e.g. in a coiled tubular heat exchanger, has three functions: Partial condensation of a vapor, rectification and simultaneous vapor-liquid separation. Dephlegmators are used in chemical plants at the top of distillation columns or standing alone, replacing for instance a small column. Advantages, limits of application, economic aspects and the design procedure are considered. The design procedure of coiled tubular dephlegmators can be split up into four main steps: Tray-to-tray calculation for required mass transfer, design of heat exchanger, entrainment and actual mass transfer in the tube bundle. Finally, more general design methods are discussed.

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