Method and device for the production of purified steam

Details Method and device for the production of purified steam Method and device for the production of purified steam

B - Operations, Transporting

01

D

B01D 1/06 (2006.01) B01D 1/30 (2006.01) F22B 1/08 (2006.01) F22B 27/16 (2006.01) F22B 37/32 (2006.01)

Patent

CA 2494564

The invention relates to a method and a device for the production of pure steam. A falling-film evaporator is used. Of the water-steam mixture leaving the evaporator unit, part of the water is collected at the bottom of the device, and a fraction mainly consisting of steam enters a rising spiral channel for the separation of impurities. In the periphery of the spiral channel apertures are provided for separating impurity-containing droplets, which condense on a surface outside the apertures. The liquid formed is removed from the device. The water phase collected at the bottom enters a recycle line connected to the feed end of the evaporator unit. Feed water is supplied to the recycle line to compensate for pure steam consumption.

L'invention concerne un procédé et un dispositif permettant de produire de la vapeur épurée. On utilise un évaporateur à ruissellement. Du mélange de vapeur d'eau quittant l'évaporateur, on recueille une partie de l'eau au fond du dispositif, et une fraction essentiellement formée de vapeur pénètre dans un canal spiralé montant aux fins de la séparation des impuretés. Dans la périphérie du canal spiralé, des orifices permettent de séparer les gouttelettes contenant des impuretés, qui se condensent sur une surface à l'extérieur des orifices. Le liquide formé est retiré du dispositif. La phase aqueuse recueillie au fond pénètre dans une ligne de recyclage reliée à l'extrémité d'alimentation de l'évaporateur. L'eau d'alimentation alimente la ligne de recyclage pour compenser la consommation de vapeur épurée.

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