Refrigeration – Cryogenic treatment of gas or gas mixture – Solidification
Patent
1997-01-30
1998-12-08
Tapolcai, William E.
Refrigeration
Cryogenic treatment of gas or gas mixture
Solidification
62384, F25D 312
Patent
active
058455167
ABSTRACT:
An improved dry ice pelletizer and method for significantly increased pellet production. The improvement consists of multiple injection ports used for the timed introduction of liquid carbon dioxide into a dry ice extrusion cylinder so that the cylinder can be more completely filled with carbon dioxide snow before extrusion takes place. Part of the improvement stems from the use of a solid mass of carbon dioxide, called a puck, which is chamfered and serves to capture carbon dioxide vapor and snow within the compression cylinder. The resulting improvement in carbon dioxide pellet output is roughly 400% over that achieved by conventional methods. The inventive improvement may also be installed as a retrofit to conventional dry ice pellet extrusion machines.
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TOMCO.sub.2 Systems, Sep. 22, 1993, 500 & 1000 Lb./Hr. Dry ice Extruders (4 pages).
Carbonic Reserves
Tapolcai William E.
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