A METHOD AND EQUIPMENT FOR HEAT RECOVERY

The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis process for the production of aluminium. Heat is recovered by means of an extraction/suction system, where the exhaust gas contains dust and/or par...

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Main Authors SLUNGAARD, TORBJORN, MOXNES, BJORN PETTER, NAESS, ERLING, SONJU, OTTO KRISTIAN
Format Patent
LanguageEnglish
French
Published 10.07.2012
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Abstract The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis process for the production of aluminium. Heat is recovered by means of an extraction/suction system, where the exhaust gas contains dust and/or particles. The heat is recovered as the exhaust gas is brought into contact with heat-recovery elements. Flow conditions and the design of the heat recovery elements are such that the deposits of the dust and/or particles on the surfaces stated are kept at a stable, limited level. In preferred embodiments, the heat-recovery elements have a circular or an extended, elliptical cross-section and may be equipped with fins or ribs. L'invention porte sur un procédé et un équipement permettant de récupérer la chaleur des gaz de combustion émis par un processus industriel, par exemple un processus d'électrolyse pour la production d'aluminium. La chaleur est récupérée au moyen d'un système d'extraction/aspiration, les gaz de combustion contenant de la poussière et/ou des particules. La chaleur est récupérée au fur et à mesure que les gaz de combustion sont mis en contact avec des éléments de récupération de chaleur. Les conditions d'écoulement et la conception des éléments de récupération de chaleur sont telles que les dépôts de poussière et/ou de particules sur les surfaces sont maintenus à un niveau limité stable. Dans des modes de réalisation préférés, les éléments de récupération de chaleur possèdent une section transversale circulaire ou elliptique, étendue, et peuvent être équipés d'ailettes ou d'arêtes.
AbstractList The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis process for the production of aluminium. Heat is recovered by means of an extraction/suction system, where the exhaust gas contains dust and/or particles. The heat is recovered as the exhaust gas is brought into contact with heat-recovery elements. Flow conditions and the design of the heat recovery elements are such that the deposits of the dust and/or particles on the surfaces stated are kept at a stable, limited level. In preferred embodiments, the heat-recovery elements have a circular or an extended, elliptical cross-section and may be equipped with fins or ribs. L'invention porte sur un procédé et un équipement permettant de récupérer la chaleur des gaz de combustion émis par un processus industriel, par exemple un processus d'électrolyse pour la production d'aluminium. La chaleur est récupérée au moyen d'un système d'extraction/aspiration, les gaz de combustion contenant de la poussière et/ou des particules. La chaleur est récupérée au fur et à mesure que les gaz de combustion sont mis en contact avec des éléments de récupération de chaleur. Les conditions d'écoulement et la conception des éléments de récupération de chaleur sont telles que les dépôts de poussière et/ou de particules sur les surfaces sont maintenus à un niveau limité stable. Dans des modes de réalisation préférés, les éléments de récupération de chaleur possèdent une section transversale circulaire ou elliptique, étendue, et peuvent être équipés d'ailettes ou d'arêtes.
Author NAESS, ERLING
SONJU, OTTO KRISTIAN
MOXNES, BJORN PETTER
SLUNGAARD, TORBJORN
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Snippet The present invention relates to a method and equipment for recovering heat from exhaust gas removed from an industrial process, such as an electrolysis...
SourceID epo
SourceType Open Access Repository
SubjectTerms APPARATUS THEREFOR
BLASTING
CHEMISTRY
DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
FURNACES
HEAT EXCHANGE IN GENERAL
HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
HEATING
KILNS
LIGHTING
MECHANICAL ENGINEERING
METALLURGY
OVENS
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS
RETORTS
WEAPONS
Title A METHOD AND EQUIPMENT FOR HEAT RECOVERY
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