| 摘要 |
The invention relates to an apparatus comprising a stack of plates having plates of a type A and a type B alternating. Each plate has exposed channels and a semi-permeable membrane 1 turned over one of its edges 2. The membranes extend into the exposed channels 8, 8a-9, 9a to provide locations for the passage of the fluid to be treated flowing between the two superposed membranes 1 arranged between two adjacent plates A and B. Further exposed channels 13, 15, 17, 19 are used for the passage of the treating fluid flowing between the face of each plate in the exchange and/or separation zones 3, 3a of the plates A and B thereon and the adjacent membrane. If each plate A is symmetrical relative to a median plane perpendicular to one edge 2, each plate B of the stack can be considered as a plate A which has been turned through 180 degrees about a median axis perpendicular to the edge 2.
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