TWO-EFFECT FILM EVAPORATOR Russian patent published in 1997 - IPC

FIELD: distillation desalting of brines and sea water, in particular, shipboard desalinating plants. SUBSTANCE: internal space of evaporator body along its entire length from spraying device to bottom is separated by longitudinal partition having rectangular port in lower part for crossover of the secondary steam to adjacent stage. Installed outside of tube bank between tube plates are longitudinal vertical partitions with rectangular ports for crossover of secondary steam. Segment hollows are formed between partitions and outer body to accommodate separators for purification of secondary steam and steam-jet compressor. Design of two-effect film evaporator provides for production of preset quantity of distillate within the wide range of operating conditions of evaporator due to curved trajectory of movement of secondary steam and sufficient height of separators along the level of brine. Absence of external bypass channels for secondary steam with large flow sections and large radii of turn allows reduction of sizes of evaporator that is of special importance for shipboard plants. EFFECT: higher efficiency. 6 dwg