Multiple effect distillation systems

Abstract

Abstract ACCORDING TO THE MULTIPLE EFFECT EVAPORATION PROCESS DISCLOSED HEREIN, A FEED LIQUOR IS SEQUENTIALLY OPERATED ON IN A PLURALITY OF SERIALLY ARRANGED EVAPORATOR EFFECTS. HOT VAPOR DIRECTED INTO ONE EFFECT TRANSFERS HEAT TO LIQUOR IN THE EFFECT TO VAPORIZE PART OF THE LIQUOR AND TO ENRICH THE REMAINDER OF THE LIQUOR TO FORM A CONCENTRATE. THE HOT VAPOR CONDENSES ON A HEAT TRANSFER SURFACE SO THAT SOME OF THE HOT VAPOR FORMS A CONDENSATE. THE ENRICHED LIQUOR (CONCENTRATE) AND THE VAPOR FROM THE LIQUOR ARE FORWARDED TO THE NEXT EFFECT IN SUCH A MANNER THAT THE VAPOR FROM THE LIQUOR TRANSFERS HEAT TO THE ENRICHED LIQUOR TO VAPORIZE PART OF THE ENRICHED LIQUOR, THEREBY ENRICHING THE REMAINDER OF THE ENRICHED LIQUOR. MORE VAPOR IS CONDENSED IN EACH EFFECT. THE FEED LIQUOR IS PREHEATED BY SPONTANEOUSLY VAPORIZING SOME OF THE ENRICHED LIQUOR FROM EACH EFFECT TO COOL THE REMAINDER OF THE ENRICHED LIQUOR, AND BY TRANSFERRING HEAT FROM THE VAPOR FROM THE ENRICHED LIQUOR TO THE FEED LIQUOR, THEREBY HEATING THE FEED LIQUOR. THE FEED LIQUOR IS ALSO PREHEATED BY CONDENSING HOT VAPOR FROM EACH EFFECT ON HEAT EXCHANGE TUBES CONTAINING THE EFFECT OF FEED LIQUOR. THE FEED LIQUOR IS ALSO HEATED BY SPONTANEOUSLY VAPORIZING A PORTION OF THE CONDENSED VAPOR IN THE PRESENCE OF HEAT EXCHANGE TUBES CARRYING FEED LIQUOR TO HEAT THE FEED LIQUOR. ALSO, AS CONCENTRATE IS FORWARDED TO EACH EFFECT, IT IS SPONTANEOUSLY VAPORIZED TO COOL SOME OF THE CONCENTRATE THEREBY ESTABLISHING A TEMPERATURE DIFFERENTIAL BETWEEN THE VAPORS FROM THE RPEVIOUS EFFECT AND THE COOLED CONCENTRATE TO EFFECTUATE HEAT TRANSFER BETWEEN THE HOT VAPORS AND THE COOLED CONCENTRATE. D R A W I N G

Inventors

• 👤 David D Kays

Bibliographic Details