Patent ID: 6761213
Filing Date: 2004-07-13
Classification: F25J,F28D,Y10S

Abstract:
Process for vaporizing a first fluid using a reboiler/condenser bath heat exchanger located in a bath of the first fluid, comprising the following steps:flowing a second fluid to be condensed through vertical heat exchange passages, said second fluid having an exit temperature T2-2; flowing the first fluid from the bottom up over a height h by thermosiphon effect between the heat exchange passages, said first fluid having an entry temperature T1-1, where T1-1 is less than T2-2 and a vaporized fraction of said first fluid having an exit pressure P1-2; pressurizing the first fluid having an entry pressure P1-1 to a value such that the exit pressure P1-2 is greater than the minimum exit pressure Pm,ex of the vaporized fraction of the first fluid needed to allow a plant in which the reboiler/condenser bath heat exchanger is mounted to operate; and selecting the height h of the heat exchange passages and the temperature T2-2 of the second fluid such that at least both of the two following conditions are fulfilled: the height h of said heat exchange passages is at least equal to 2.5 m; and the temperature T2-2 of said second fluid is less than T1-1+1.2Â° C.