Method and apparatus for automatic production of blocks of solid

Details Method and apparatus for automatic production of blocks of solid Method and apparatus for automatic production of blocks of solid

1991-12-12

1993-11-02

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 35, 62384, 62388, F25J 100

Patent

active

052575039

ABSTRACT:
A method and apparatus to automatically produce blocks of solid CO.sub.2 at low pressure. The apparatus includes at least one closed mold coupled to a liquid CO.sub.2 conditioner and a CO.sub.2 gas recovery system, and a control panel for automatic operation. The method consists in supplying liquid CO.sub.2 to this mold at a low pressure in order to fill the mold with CO.sub.2 snow of low density during a definite period of time, to then raise the pressure inside the mold to an intermediate pressure by supplying liquid CO.sub.2 at this pressure (and at a temperature of approximately -40.degree. C.) to form a dense mass of solid CO.sub.2 which after a definite time will block the admission of CO.sub.2 to the mold, causing a significant pressure drop that is used to create a signal to automatically close off the supply of liquid CO.sub.2 and finalize the production cycle of the block.

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