Vertical recirculating type vapor generator

Claim 1

A VAPOR GENERATOR COMPRISING A VERTICALLY ELONGATED BODY FORMING A SUBSTANTIALLY CLOSED VAPOR GENERATING CHAMBER; A PLURALITY OF FLUID CONDUCTING TUBES EXTENDING INTO SAID CHAMBER; MEANS FOR EFFECTING A FLOW OF HEATING FLUID THROUGH SAID TUBES; CONDUIT MEANS OPEN AT BOTH ENDS EXTENDING LONGITUDINALLY OF SAID CHAMBER AND TERMINATING SHORT OF THE ENDS THEREOF FOR CONDUCTING VAPORIZABLE LIQUID TO THE BOTTOM OF SAID CHAMBER, SAID CONDUIT MEANS BEING SPACED FROM THE WALL OF SAID CHAMBER TO FORM DOWNCOMER AND RISER PASSAGES THEREIN; MEANS COMMUNICATING WITH SAID DOWNCOMER PASSAGE FOR ADMITTING VAPORIZABLE LIQUID THERETO, SAID VAPORIZABLE LIQUID FILLING SAID CHAMBER TO A LEVEL ABOVE THE TOP OF SAID CONDUIT MEANS BUT SPACED FROM THE TOP OF SAID CHAMBER TO DIVIDE SAID CHAMBER INTO AN EVAPORATING SPACE AND A SUPERHEATING SPACE IMMEDIATELY THEREABOVE; ALL OF SAID TUBES BEING IMMERSED AT LEAST TO A SUBSTANTIAL DEGREE IN SAID VAPORIZABLE LIQUID TO PROVIDE HEATING SURFACE FOR SAID EVAPORATING SPACE; AT LEAST TO OF SAID TUBES EXTENDING ABOVE THE LEVEL OF SAID VAPORIZABLE LIQUID TO PROVIDE HEATING SURFACE FOR SAID SUPERHEATING SPACE; VAPOR OUTLET MEANS COMMUNICATING WITH SAID SUPERHEATING SPACE; AND BAFFLE MEANS POSITIONED IN SAID SUPERHEATING SPACE BETWEEN SAID LIQUID LEVEL AND SAID VAPOR OUTLET MEANS FOR DIRECTING VAPOR GENERATED IN SAID EVAPORATING SPACE CROSS THE TUBE SURFACE LOCATED IN SAID SUPERHEATING SPACE PRIOR TO ITS PASSING THROUGH SAID VAPOR OUTLET MEANS.