Distillation: processes – separatory – And recovering heat by indirect heat exchange – Utilizing recovered heat for heating feed
Patent
1981-03-06
1985-01-22
Bascomb, Wilbur
Distillation: processes, separatory
And recovering heat by indirect heat exchange
Utilizing recovered heat for heating feed
203 2, 203 50, 203 70, 203DIG16, 203DIG19, 208184, 208348, 208351, 208353, 415 1, 415112, 415168, 415175, 585867, B01D 334, C10M 1100, F01M 1103
Patent
active
044950357
ABSTRACT:
The invention pertains to improvements in a fluid handling system in which a working fluid passes through a rotor while undergoing a pressure change. A shaft extends longitudinally from and rotates with the rotor. A first seal surrounds the shaft in axially spaced relation to the rotor, and a lubricant having a minimum boiling point is injected into the first seal adjacent the shaft at a pressure sufficient to cause the lubricant to flow axially toward the rotor. A housing surrounds the rotor and shaft and defines a contact zone between the rotor and the first seal for receiving both lubricant and a contact fluid such as the working fluid or a seal buffer gas used to isolate the working fluid from the lubricant. The contact fluid has a maximum boiling point substantially less than the minimum boiling point of the lubricant. A composite liquid comprising contact fluid and lubricant is collected from the contact zone and the contact fluid separated therefrom by fractional distillation in the presence of an additive fluid having a boiling point greater than the maximum boiling point of the contact fluid but less than the minimum boiling point of the lubricant.
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