| 摘要 |
A paired stage flash evaporator unit (10) is provided with an elongated shell (15) having respective higher temperature and lower temperature evaporation chambers (11 and 13) extending along a bottom portion of the shell space and separated from each other by an interstage elongated partition wall (44). A condenser tube bundle (30) extends longitudinally between opposite shell end walls (18 and 20) in an upper portion of the shell space. A transverse interstage partition (32) separates the tube bundle into separate condenser chambers (34 and 36). Each condenser chamber (34 and 36) is paired with an evaporation chamber (11 and 13) by means of shroud (35 and 37) and other isolation structure thereby forming two paired stages in the unit. In each stage, a liquid separator mesh (40, 41) extends coextensively with the evaporation chamber (11) and both condenser chambers (34 and 36) to direct vapor from the evaporation chamber (11) into a flow path above the mesh (40). Vapor which is generated at points longitudinally displaced from the associated condenser chamber (34 and 36) can thus flow longitudinally along the flow path above the mesh (40, 41) to an area where it is directed into the associated condenser chamber (34, 36). The shell (15) has a roof member (16) which is sloped over the space above each mesh (40, 41) so that the longitudinal flow path increases in cross section toward the receiving condenser chamber (34, 36). |
