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US 4,062,734 AGranted
Apparatus for desalinating sea water
AssigneeSnamprogetti S.p.A.
InventorGiorgio Pagani
Life of this patent
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Abstract
A sea water desalination system which is composed by a compact and self-contained unit, each unit comprising several evaporation stages, means being provided for recycling the condensates and for dissipating the pressure differential existing between the brine-containing tub and the tube plate of each individual stage.
Claims4
In an apparatus for desalinating sea water characterized in that it is composed by a vertically positioned column subdivided into a plurality of cylindrical sections, each of which comprises the following components:
- a. a film-evaporator in a tube bundle vertical arrangement having a circular cross-sectional outline, without an outer casing;
- b. a tub which is connected at the bottom portion with the top tube plate of the evaporator of the same cylindrical section, the tub in the last section being deprived of the evaporator and being connected to the brine discharge tube, and connected at the top with the bottom tube plate of the evaporator of the overlying section, said tub being connected, in the first cylindrical section to the sea water feeding tube;
- c. a lamination system arranged at the bottom of the tub that is adapted to allow brine to flow from the tub to the underlying tube plate by dissipating the positive pressure differential that is obtained between the tub and the tube plate;
- d. openings formed through the upper sidewall of the tub, except that of the cylindrical section;
- e. one or more siphoning tubes for taking the condensate collected at the bottom of each cylindrical section to recycle the condensate at intermediate points of the subsequent cylindrical section;
- the improvement which comprises;
- f. a preheater housed in a through-tube, the tube being passed through the tub and welded thereto.
4 more elements
Dependencies are inferred from the claim text.