Method and apparatus for converting saline water to fresh water

Details Method and apparatus for converting saline water to fresh water Method and apparatus for converting saline water to fresh water

1976-07-01

1977-10-18

Sofer, Jack

Distillation: processes, separatory

Addition of material to distilland to inhibit or prevent...

For scale inhibiting or corrosion preventing

203 11, 203 24, 203 27, 203 79, 203 88, 203100, 202173, 202174, 202177, 202233, 159 2MS, 159 16S, 159 18, 159 24R, 159 45, 159 47R, 159DIG8, 159DIG13, B01D 300, B01D 302, B01D 306, B01D 310

Patent

active

040544931

ABSTRACT:
Preheated saline water, typically sea or brackish water, is further heated by quanta of steam, passed to it at differential temperatures and pressures and condensed in the saline water. Scale compounds are precipitated and scale-forming bicarbonates decomposed, with the evolution of carbon dioxide, which is gathered and expelled by steam accessory to the quanta of steam. Post-thermal saline water, which is formed, is multistage flash vaporized while self-cooling. The flashed vapors are compressed to form said quanta of steam. After being further cooled while preheating saline water, post-thermal saline water is evaporated in a multistage vapor compression evaporator, producing brine at a high concentration factor. Relative to equilibrium in scale-compound precipitation between 302.degree. F and 347.degree. F, the recovery of fresh water is 70% to 80% for sea water, and 80% to 90% for brackish waters over a wide range of salinity.

REFERENCES:
patent: 2979442 (1961-04-01), Badger
patent: 3026261 (1962-03-01), Mayfield et al.
patent: 3119752 (1964-01-01), Checkovich
patent: 3218241 (1965-11-01), Checkovich
patent: 3389059 (1968-06-01), Goeldner
patent: 3399975 (1968-09-01), Otten
patent: 3420775 (1969-01-01), Cadwallader
patent: 3476654 (1969-11-01), Sieder
patent: 3607666 (1971-09-01), Roller
patent: 3647638 (1972-03-01), Osdor

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