F - Mech Eng,Light,Heat,Weapons – 28 – B
Patent
F - Mech Eng,Light,Heat,Weapons
28
B
F28B 1/06 (2006.01) B01D 3/34 (2006.01) B01D 5/00 (2006.01) D21C 11/06 (2006.01) F28D 5/02 (2006.01) F28F 13/00 (2006.01)
Patent
CA 2257207
The invention concerns a heat exchanger, for use in particular in connection with the process outlets at paper, pulp and board mills, which heat exchanger comprises a number of substantially parallel tubes (11) or equivalent, fitted in a duct (12), through which tubes or equivalent the air flow (23) that delivers heat is fitted to pass, and the air flow that receives heat (21) is fitted to pass through the gaps between said tubes (11) in accordance with the cross-flow principle. The heat faces of the tubes (11) have been made larger at the side of the flow that receives heat by means of ribs, lamellae or equivalent, and an air that is moist, saturated, or near the saturation curve is fitted to be used as the air flow (23) that delivers heat in the heat exchanger (10).
Cette invention concerne un échangeur de chaleur qui est notamment destiné à des systèmes d'évacuation après traitement dans des usines de fabrication de papier, de pâte à papier et de carton. Cet échangeur de chaleur comprend plusieurs tubes (11) globalement parallèles, ou leurs équivalents, lesquels sont montés à l'intérieur d'une conduite (12). Un flux d'air (23) convoyant la chaleur va passer à travers ces tubes, ou leurs équivalents, tandis que le flux d'air qui va recevoir la chaleur (21) va passer dans des espacements qui séparent les tubes (11) selon le principe de l'écoulement transversal. Les surfaces thermiques des tubes (11) possèdent des dimensions plus importantes au niveau du côté recevant la chaleur, ceci grâce à des nervures, des lamelles ou analogue. On utilise l'air humide, saturé ou proche de la courbe de saturation comme flux d'air (23) convoyant la chaleur dans l'échangeur de chaleur (10).
Metso Paper Inc.
Sim & Mcburney
Valmet Corporation
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