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AssigneeAlfa-Laval Desalt A/S
InventorsMauri Kontu, Mogens Heine, Niels-Erik Clausen, Ralf Blomgren
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In a plate heat exchanger for evaporation of a liquid by means of a heat emitting vapor every second plate interspace forms an evaporation passage (28) and the rest of the plate interspaces form condensation passages (30). Aligned openings (16) in the plates form an inlet channel through the plate heat exchanger for introduction of evaporation liquid into the evaporation passages (28). For enabling use of a large inlet area of each condensation passage (30) and a large outlet area of each evaporation passage (28) the plate heat exchanger is arranged in a container (1), the interior of which is divided in two chambers (6, 7) by the plate heat exchanger itself and a partition (5). Sealing means (13, 26) are arranged in the plate interspaces in a way such that the evaporation passages are closed from one chamber (6) but communicate with the other chamber (7) along the edges of the plates, whereas the condensation passages (30) communicate with said one chamber (6) along the edges of the plates but are closed from the other chamber (7).
An apparatus for at least partial evaporation of a liquid by means of a heat emitting vapour which is brought into indirect contact with the liquid and which is thereby at least partly condensed, said apparatus comprising a package of heat transfer plates (4) which define plate interspaces between themselves and together with sealing means (13, 26) extending along the edges of the heat transfer plates, form an evaporation passage (28) in every second plate interspace and condensation passages (30) in the rest of the plate interspaces, the heat transfer plates (4) further having through openings (16) forming an inlet channel through the plate package for the supply of liquid into the evaporation passages (28), characterized in that
Dependencies are inferred from the claim text.