Heat exchanger for corrosive, erosive and fast settling slurries

Claim 1

A HEAT EXCHANGER ESPECIALLY ADAPTED FOR HANDLING LARGE VOLUMES OF CORROSIVE HEAT EXCHANGE LIQUIDS, THE HEAT EXCHANGER COMPRISING; (A) A GENERALLY VERTICAL TUBULAR CASING, (B) A CLOSED, LIQUID-TIGHT SLOPING BOTTOM FOR THE CASING, (C) AT LEAST TWO TUBE SHEETS EACH HAVING A PLURALITY OF TUBE HOLES THEREIN, THE SHEETS BEING VERTICALLY SPACED WITHIN THE CASING BELOW THE TOP AND ABOVE THE BOTTOM THEREOF, (D) A PLURALITY OF REMOVABLE HEAT EXCHANGER TUBES WITH THE ENDS OF THE TUBES SEALINGLY RECEIVED IN THE HOLES OF THE TUBE SHEETS, (E) THE TOPMOST OF SAID TUBE SHEETS INCLUDING MEANS FOR SEALINGLY RECEIVING THE PLURALITY OF REMOVABLE HEAT EXCHANGER TUBES AND MEANS FOR RECEIVING A TUBE REMOVAL SHIELD OVER EACH TUBE HOLE IN THE TUBE SHEET, (F) THE LOWERMOST OF SAID TUBE SHEETS INCLUDING TUBE SEAT MEANS FOR SEALINGLY RECEIVING A PLURALITY OF REMOVABLE HEAT EXCHANGER TUBES FOR VERTICAL REMOVAL OF THE TUBES THEREFROM, (G) FIRST HEAT EXCHANGER FLUID INLET AND OUTLET MEANS IN THE CASING BETWEEN THE POSITIONS OF THE TUBE SHEETS, (H) SECOND HEAT EXCHANGER FLUID INLET AND OUTLET MEANS ABOVE THE TOP TUBE SHEET AND BELOW THE BOTTOM TUBE SHEET SO THAT THE SECOND HEAT EXCHANGER FLUID WILL FLOW THROUGH SAID TUBES SEALINGLY SUPPORTED BETWEEN THE TUBE SHEETS AND THE FIRST HEAT EXCHANGER FLUID WILL FLOW AROUND THE OUTSIDE OF THE TUBES.