Method for cool drying.

B - Operations – Transporting – 01 – D

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Details

B01D 53/26 (2006.01) B01D 5/00 (2006.01) F25B 49/02 (2006.01) G05D 23/19 (2006.01)

Patent

CA 2667899

Method for cool drying gas containing water vapour, whereby this gas is led through the secondary part of a heat exchanger (2), whose primary part is the evaporator (3) of a cooling circuit (4), whereby the temperature or the dew point is measured in the environment of the place where, when cool drying, the temperature of the gas to be dried is the lowest, and whereby the above-mentioned method comprises the step of switching off the cooling circuit (4) when the decrease of the lowest measured gas temperature (LAT) or the dew point during a predetermined period of time amounts to less than a preset value (y).

La présente invention concerne un procédé pour sécher à froid un gaz contenant de la vapeur d'eau, ce gaz étant amené dans la partie secondaire d'un échangeur de chaleur (2), dont la partie primaire est l'évaporateur (3) d'un circuit de refroidissement (4), la température ou le point de rosée étant mesuré dans l'environnement de l'endroit où, pendant le séchage à froid, la température du gaz à sécher est la plus basse. Le procédé susmentionné comprend l'étape consistant à éteindre le circuit de refroidissement (4) lorsque la baisse de la température du gaz la plus basse mesurée (LAT) ou le point de rosée pendant une durée prédéterminée est inférieure à une valeur prédéfinie (y).

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