| 摘要 |
An extruder for converting pressurized liquid CO2 feed into dry ice pellets of predetermined shape and size, wherein the CO2 snow formation, CO2 snow compaction, and dry ice pellet extrusion phases occur simultaneously to achieve production rates on the order of 700-1000 lbs/hr. The compacted CO2 snow may be in the form of a solid cartridge or irregularly shaped solids, and such compacted particles may constitute an end product by themselves. The increased production rates are also achieved by enhanced removal of CO2 gas from the CO2 snow formation chamber, and use of a bidirectional internal regeneration cylinder to provide compactive force. The extruder is portable, since it only weighs approximately 1000 lbs., can be powered with a non-stationary energy source, and may be used to remanufacture partially sublimated dry ice solids into extruded dry ice pellets of a predetermined shape and size.
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