METHOD AND DEVICE FOR TREATING WATER

METHOD AND DEVICE FOR TREATING WATER

Purified water for special purposes is produced using a falling-film multieffect evaporator. From the feed water, each effect produces a steam phase and a water phase. The steam phase is used for heating in the subseque nt evaporating step, whereby the steam phase condenses to product water, and th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NURMINEN, TEPPO, SALMISUO, MAURI, LAITINEN, ILKKA OLAVI
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:Purified water for special purposes is produced using a falling-film multieffect evaporator. From the feed water, each effect produces a steam phase and a water phase. The steam phase is used for heating in the subseque nt evaporating step, whereby the steam phase condenses to product water, and th e water phase becomes feed water for the subsequent evaporation step. Accordin g to the invention, the product water may be wholly or partly recycled to the initial feed water, allowing process startup and sterilisation of the plant without conducting hot product water to the drain.