Heat exchanger with vapor extractors

A heat exchanger comprising a plurality of sub-assemblies consisting in part of a layer of a thermally conductive material, said heat exchanger comprising:

• evaporation surfaces configured to generate a primary vapor coming from a liquid to be treated,
• condensation surfaces configured to condense a secondary vapor into a condensate and to capture latent heat from condensation, the secondary vapor being the vapor to be condensed,
• wherein said thermally conductive material is configured to transfer at least a portion of the latent heat of condensation from one or more of said condensation surfaces to one or more of said evaporation surfaces,
• said heat exchanger being defined by a volume divided into a plurality of zones,
• said heat exchanger being characterized in that each of said zones comprises at least:
• one of said sub-assemblies, and
• an extractor means configured to channel at least part of said primary vapor generated in said zone towards the outside of said volume,
• wherein the extractor means are configured to discharge the primary vapor outside of said volume without passing in front of the evaporation surfaces of other adjacent sub-assemblies.