Multistage flash evaporator

Claim 1

A MULTISTAGE-MULTILEVEL EVAPORATOR COMPRISING A CONCRETE SHELL DEFINING A CHAMBER, A PLURALITY OF TRAYS DISPOSED IN BOTH VERTICALLY STACKED ARRAYS AND IN LONGITUDINAL ROWS IN SAID CHAMBER, MEANS FOR DISTRIBUTING HEATED BRINE FOR FLASHING TO EACH OF SAID TRAYS TO FLOW FROM ONE END LONGTUDINALLY TO THE OTHER END OF SAID CHAMBER, A PLURALITY OF CONDENSER TUBES DISPOSED IN TUBE BANKS ON OPPOSITE LATERAL SIDES OF AND SPACED APART FROM SAID TRAYS AND EXTENDING FROM ABOVE THE TOPMOST TRAY ROW TO THE BOTTOMMOST TRAY ROW IN SAID ARRAYS, MEANS FOR PUMPING COOLING SEA WATER THROUGH SAID TUBE BANKS FROM SAID OTHER END TO SAID ONE END AT LEAST ONE CHANNEL IN THE BOTTOM OF SAID SHELL FOR COLLECTING CONDENSED FLUSH VAPOR BY GRAVITY FROM THE SURFACES OF SAID COILS, A PLURALITY OF TRANSVERSE DOWNWARDLY EXTENDING VERTICAL BAFFLES ALIGNED TO DIVIDE SAID CHAMBER INTO A SERIES OF LONGITUDINALLY SEPARATED COMPARTMENTS OF GRADUALLY DECREASING TEMPERATURE AND PRESSURE, SAID BAFFLES DEPENDING VERTICAL BAFFLES ALIGNED TO DIVIDE SAID CHAMBER INTO A SERIES OF LONGITUDINALLY SEPARATED COMPARTMENTS OF GRADUALLY DECREAING TEMPERATURE AND PRESSURE, SAID BAFFLES DEPENDING FROM THE SHELL ROOF AND THE BOTTOM OF SAID TRAYS TO A POINT BELOW THE NORMAL TRAYS LEVEL IN THE LIQUID THEREBELOW, A PLURALITY OF UPSTANDING VERTICAL BAFFLES CARRIED BY THE BOTTOMS OF SAID TRAYS AND THE FLOOR OF SAID SHELL, SAID LAST-NAMED BAFFLES BEING COPLANAR VERTICALLY AND BEING OFFSET DOWNSTREAM FROM SAID DOWNWARDLY-EXTENDING BAFFLES TO FORM WEIRS FOR SAID LIQUID BETWEEN COMPARTMENTS, MEANS FOR COLLECTING BRINE FROM THE ENDS DOWNSTREAM OF SAID TRAYS FOR PARTIAL RECYCLING, AND MEANS TO COLLECT SAID CONDENSED VAPOR CONNECTED TO THE LAST OF SAID COMPARTMENTS.