Apparatus and methods for removing solvent residues

Details Apparatus and methods for removing solvent residues Apparatus and methods for removing solvent residues

B - Operations, Transporting

01

D

B01D 11/02 (2006.01) B01D 1/28 (2006.01) B01D 3/40 (2006.01)

Patent

CA 2383594

In biomass extraction apparatuses there is a need for improvements in the efficiency of recovery of solvent, such as R-134a, from spent biomass. An apparatus for extracting biomass includes an extractor (11), evaporator (12), compressor (13) and condenser (14) connected in series by pipework (17) to define a closed loop extraction circuit. A transfer line (18) selectively supplies hot solvent vapour from the outlet side of the compressor (13) to the interior of the extractor (11), where the solvent vapour heats the biomass. This causes stripping of solvent from the biomass. The transfer line (18) includes control elements (19, 20) for controlling the flow of solvent vapour.

Dans les dispositifs d'extraction de la biomasse, il existe un besoin au niveau des améliorations à apporter à l'efficacité de la récupération de solvants, tels que le R-134a, à partir de la biomasse utilisée. Un dispositif d'extraction de la biomasse comprend un extracteur (11), un évaporateur (12), un compresseur (13) et un condenseur (14) reliés en série par des tubulures (17) afin de créer un circuit d'extraction en boucle fermée. Une ligne de transfert (18) émet sélectivement de la vapeur de solvant chaude au niveau du côté de sortie du compresseur (13), vers l'intérieur de l'extracteur (11), où la vapeur de solvant chauffe la biomasse. Ceci permet de séparer les solvants de la biomasse. La ligne de transfert (18) comprend des éléments de commande (19, 20) destinés à commander le courant de vapeur de solvant.

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