Process and devices to clean and reuse displaced outgoing...

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 5/00 (2006.01) B01D 53/00 (2006.01) B01D 53/26 (2006.01) F26B 21/08 (2006.01)

Patent

CA 2264627

The present invention relates to a process and devices to clean and reuse displaced outgoing air containing additives (e.g. solvents) or pollutants, especially to clean and reuse outgoing air with solvents displaced from drying devices in offset web-fed rotary presses. In the first stage of the process the outgoing air is passed through at least one condenser so that the additives or pollutants contained in the air can be condensed out. In the second step of the process the outgoing air treated from the first stage of the process is passed through at least one separator element in order to clean said air further from condensed additives or pollutants contained therein. Finally, the outgoing air treated after the second step of the process is returned for renewed absorption or suction of additives and pollutants.

L'invention concerne un procédé et des dispositifs pour l'épuration et la réutilisation d'air évacué renfermant des additifs (par exemple, des solvants) ou des impuretés, en particulier pour l'épuration et la réutilisation d'air évacué renfermant des solvants, provenant de dispositifs de séchage de presses offset À bobines. Dans une première étape, l'air évacué est envoyé à travers au moins un condenseur destiné à séparer par condensation les additifs ou les impuretés contenus dans l'air évacué. Dans une deuxième étape, l'air traité provenant de la première étape est envoyé à travers au moins un séparateur, en vue de purifier plus complétement l'air évacué, en éliminant les additifs ou les solvants condensés qu'il contient. Enfin, on recycle l'air traité, provenant de cette deuxième étape, en vue d'une absorption ou d'une aspiration renouvelée des additifs et des impuretés.

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