Multi-stage evaporator

Abstract

Abstract A MULTI-STAGE EVAPORATOR FOR EVAPORATING A LIQUID BY MEANS OF A HEATING FLUID COMPRISING A PLURALITY OF EVAPORATOR STAGES ARRANGED IN SERIES OF COMMUNICATION ONE ABOVE THE OTHER WHEREIN EACH STAGE INCLUDES ONE OR MORE EVAPORAING PASSAGES THROUGH WHICH THE LIQUID TO BE EVAPORATED IS CAUSED TO DESCEND, THE EVAPORATING PASSAGES BEING FLANKED BY PASSAGES TO WHICH HEATING FLUID IS SUPPLIED, THE ARRANGEMENT BEING SUCH THAT THE HEATINF FLUID CONDENSES, GIVING UP HEAT TO THE LIQUID TO BE EVAPORATED, AND CONDENSES IN RESERVOIRS WHICH ARE DIVIDED BY PARTITIONS TO FORM BAROMETRIC LEG ARRANGEMENTS. THE CONDENSED HEATING FLUDI IN THE RESERVOIRS THEREBY MAINTAINS A PRESSURE DIFFERENTIAL BETWEEN SUCCESSIVE STAGES. A COLLECTOR TRAY BENEATH EACH STAGE COLLECTS RESIDUAL UNEVAPORATED LIQUID AND DELIVERS IT TO THE EVAPORATING PASSAGES OF THE NEXT STAGE. THE TRAY ALSO COLLECTS CONDENSED HEATING FLUID OVERFLOWING FROM BAROMETRIC LEGS AND DELIVERS THIS TO THE HEATING PASSAGES OF THE NEXT STAGE. THE TRAY INCLUDES APERTURES TO ALLOW VAPOR TO PASS FROM THE EVAPORATING PASSAGES OF ONE STAGE TO THE HEATING PASSAGES OF THE NEXT STAGE.

Inventors

• 👤 M Davidson

Bibliographic Details