Shell and tube type vapor generating unit

Claim 1

A VAPOR GENERATING UNIT COMPRISING A HORIZONTALLY ELONGATED VAPOR GENERATION CHAMBER AND A DETACHED, VERTICALLY ORIENTED VAPOR AND LIQUID DRUM POSITIONED ADJACENT THERETO; A PLURALITY OF FLUID BEARING TUBES IN THE FORM OF A TUBE BUNDLE SUBSTANTIALLY FILLING SAID VAPOR GENERATION CHAMBER; MEANS FOR PASSING A HEATING FLUID THROUGH SAID TUBES; SAID VAPOR AND LIQUID DRUM HAVING AN UPPER VAPOR SPACE AND A LOWER LIQUID SPACE; A FLUID COLLECTOR POSITIONED WITHIN SAID DRUM; SEPARATOR MEANS COMMUNICATING WITH SAID FLUID COLLECTOR FOR DELIVERING SEPARATED VAPOR TO SAID VAPOR SPACE AND SEPARATED LIQUID TO SAID LIQUID SPACE; VAPOR OUTLET MEANS COMMUNICATING WITH SAID VAPOR SPACE AND LIQUID INLET MEANS COMMUNICATING WITH SAID LIQUID SPACE, ANNULAR DOWNCOMER PASSAGE MEANS CONNECTING SAID LIQUID SPACE TO SAID VAPOR GENERATION CHAMBER; BAFFLE MEANS UNDERLYING SAID PASSAGE IN SPACED RELATION FROM THE WALL OF SAID VAPOR GENERATION CHAMBER, SAID BAFFLE MEANS EXTENDING ABOUT THE TOP AND SIDE PORTIONS OF THE WALL OF SAID VAPOR GENERATION CHAMBER AND ENCOMPASSING SAID TUBE BUNDLE OVER A SUBSTANTIAL PORTION OF ITS PERIPHERY; FLUID CONDUCTING MEANS COMPRISING A FLUID BEARING TUBE MOUNTED WITHIN SAID PASSAGE MEANS HAVING ONE END PENETRATING SAID BAFFLE MEANS AT SUBSTANTIALLY THE TOP THEREOF AND COMMUNICATING WITH THAT PORTION OF SAID VAPOR GENERATION CHAMBER ENCLOSED BY SAID BAFFLE MEANS AND THE OTHER END IN COMMUNICATION WITH SAID FLUID COLLECTOR.