structure of column of distillazio in prestressed concrete multiple stage particularly for dissa report of sea water

摘要

1422397 Multiflash distillation column SOC GENERALE D'ENTREPRISES 26 Jan 1973 [27 Jan 1972] 4219/73 Heading B1B In a multistage flash evaporater for brine, the brine flows as a thin film down prestressed concrete wall 2, Fig. 2a, and also as shown by arrow 34, and then through seal 41 to the next stage, flashed vapour passes through separator 8, condenses on aluminium alloy tubes 6 and passes via syphon 25 to the next stage. A method of assembling the evaporator comprises forming a circular foundation apron 18, Fig. 1, casting the casing 3 in concrete on the apron and surrounding the casing with a thermally insulating layer 5, providing peripheral ledges on the inside of the casing, stacking the central parts 15 and outer parts 4 of the platforms 1 and rolls of tubes 7 on apron 18 inside the casing, forming cover 14 at the top of casing 3 and placing liquid container 12 thereon, lifting the parts 4 and fixing them in appropriate positions by means of horizontal jacks, lifting the outer parts 15 and installing them in position, unrolling, recalibrating and drawing the condenser tubes through apertures in the central parts 4 and fixing them to the upper liquid container 12 and fixing lower liquid container 11 to the bottom of the tubes.