SEA WATER DESALTING PROCESS Russian patent published in 2004 - IPC

FIELD: water treatment.

SUBSTANCE: invention relates to sweetening sea water and brackish water, and to removal of harmful CO₂ gas contained in emissions from combustion plants. To that end, carbon dioxide-rich effluent gas is withdrawn into process vessel, into which sea water, after mixing with ammonia (to weaken Na-Cl bond) is also pumped and spread across multiple points near the top part of the vessel in the form of fine splashes so to affect CO₂-containing exhausted gas present therein. CO₂ additionally weakens Na-Cl bond so contributing to formation of solid Na₂CO₃ and NH₄Cl, which are then removed in below located settler. Desalted sea water overflows from settler and is transported to consumers. Reuse of effluent gas and removal of harmful CO₂ from effluent gas before its discharge into atmosphere are likewise assured. Solid NH₄Cl salt can be further reprocessed into ammonia while solid Na₂CO₃ is a commercial product, which may recompense the whale process. Process is largely designed for desalting water with maximum salt concentration 22%.

EFFECT: enhanced process efficiency.

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