A PLATE EVAPORATOR OF THE FALLING FILM TYPE, AND A PLATE EVAPORATOR APPARATUS HAVING SUCH A PLATE EVAPORATOR ARRANGED IN A HOUSING

摘要

A plate evaporator apparatus of the falling film type comprises a housing having an inlet (11) for liquid to be evaporated and having mounted therein a package of substantially vertically arranged heat transferring plates (4) with plate interspaces, every second one of which forms an evaporation space (28) for at least partial evaporation of said liquid and the other plate interspaces forming condensation spaces (30) for at least partial condensation of a heat emitting vapour, and further comprising first seals (13, 14) which in an upper part of said plate interspaces forming evaporation spaces (28) delimit distribution chambers (27), each of which being in liquid flow communication with at least one evaporation space (28) by flow ways (17, 18) spaced apart along the width of the package, the heat transferring plates (4) having in an upper part through openings (16) aligned to form a passage which extends through the plate package. An elongated pipe connected to the inlet (11) and extending in the passage along a length thereof, the pipe having a peripheral wall with apertures distributed along the length of the pipe and being in flow communication with the distribution chambers (27), for supplying the liquid to be evaporated from the inlet (11) to the distribution chambers through said apertures.