Constant temperature refrigeration system for a freeze heat exchanger
AssigneeChicago Bridge & Iron Company
InventorsJohn S. Andrepont, Raymond Korzonas
Life of this patent
Estimating the term…
Abstract
A freeze concentrator of the shell and tube type containing a pool of liquid cryogen within the shell, the concentrator being adapted to maintain a constant temperature within the liquid cryogen. The temperature control comprises a flash tank located above the level of liquid cryogen within the concentrator, to which the vapors evolved from the boiling cryogen are passed. The flash tank is provided with a condenser for condensing the cryogen vapor which enters the flash tank, the resulting liquid cryogen collecting within the flash tank and being recycled therefrom by gravity to the pool of cryogen in the exchanger.
Claims7
In a freeze concentrator comprising a plurality of freeze tubes, and a shell surrounding said freeze tubes and forming a chamber adapted to contain a boiling liquid cryogen with a vapor zone above the liquid level of the cryogen,
- the improvement comprising:
- a flash tank at an elevated location relative to the liquid level of said cryogen in the shell chamber;
- vapor conduit means communicating from said shell chamber vapor zone to said flash tank;
- condensing means associated with said flash tank for condensing the vapor of said cyrogen entering said tank, the condensed vapor being collected as liquid cryogen therein;
- and
- liquid conduit means communicating from said flash tank to said shell chamber for returning liquid cryogen to said shell chamber by gravity flow,
- said chamber, flash tank, vapor conduit means and liquid conduit means forming a sealed, substantially air-free system.
Dependencies are inferred from the claim text.