Chicago Bridge & Iron Company

Raymond Korzonas

John S Andrepont

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.

Constant temperature refrigeration system for a freeze heat exchanger

Apparatus for separating ice from concentrated liquid and washing the ice, including a vessel having a bottom and vertical wall joined to the bottom; a plurality of vertical tubular members in the vessel extending upwardly from the bottom; perforations in the upper portion of the tubular members through which concentrated liquid in the vessel can drain into the tubes; a first conduit for feeding a slurry of ice and concentrated liquid to the vessel; a second conduit communicating with the tubes for withdrawing concentrated liquid from the tubes; a concentrated liquid withdrawal third conduit communicating with the vessel lower interior portion for withdrawing concentrated liquid from the vessel; and control means to maintain a predetermined concentrated liquid level, and a predetermined pressure distribution, in the vessel.

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Chicago, IL, United States of America

Raymond Korzonas