Improvements to shell-and-tube heat exchangers

F - Mech Eng,Light,Heat,Weapons – 28 – F

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F28F 9/22 (2006.01) F28F 9/26 (2006.01) F28F 19/00 (2006.01)

Patent

CA 2240635

Disclosed is a shell-and-tube heat exchanger comprising a product flow insert comprising a plurality of heat transfer tubes for product, each tube having two ends, and a baffle plate disposed in each end of the heat transfer tubes, at least one of the baffle plates including flow distributors at least partly surrounding the tube ends and including portions disposed between adjacent tube ends which are convex in cross-section and asymmetrically contoured, wherein the at least one of the baffle plates has a concave inwardly angled surface.

Amélioration concernant un échangeur de chaleur tubulaire destiné en particulier à des produits renfermant des fibres (11) ou des particules. L'amélioration consiste en une pièce à introduire dans le flux (5) qui est constituée d'un certain nombre de tubes de transfert de chaleur (3) munis d'un déflecteur (6) installé fixe à chacune des extrémités (13) des tubes de transfert (3). Pour que les fibres (11) et les particules franchissent les déflecteurs (6) sans causer d'accumulation indésirable, l'un au moins des déflecteurs (6) qui fait face au sens d'écoulement du flux de la matière, comporte des répartiteurs de flux (12) qui entourent en tout ou en partie les extrémités (13) des tubes de transfert de chaleur (3).

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