Refrigeration – Processes – Circulating external gas
Patent
1992-11-25
1994-08-02
Bennett, Henry A.
Refrigeration
Processes
Circulating external gas
62 9, 62 12, 62 20, 62 77, 62 85, 62306, 62529, F25J 300, F25B 4700, F25B 4500
Patent
active
053334612
ABSTRACT:
A collection vessel and method of collecting gaseous and liquid phase collectible materials utilizes introduction of the collectible material directly into a liquid cryogenic material to provide complete condensation and a liquid-filled trap for collected gases within the liquid cryogenic material. This trap effectively eliminates escape of collected gases even though evaporated cryogenic materials may be vented and the collection vessel operated at atmospheric pressure. The performance of the vessel is thus improved and no freezing of the collected gases occurs at the inlet due to the warming of the inlet structure by the material being collected. Therefore, the collection of gases may be done at high speed and with simplified equipment. Completeness of condensation is assured by the use of a baffle of a preferably collapsible construction for retaining gases within the liquid cryogenic material until condensation is complete. A preferred embodiment of the invention includes a structure for forming a liquid trap within a vessel with a tube and a collapsible baffle and does not require any modification of an existing vessel suitable for handling liquid cryogenic materials. Recycling of collected materials, such as Freon.TM. refrigerants is also enhanced since contaminants will also be partially separated by freezing within the collection vessel and selective distillation can be done as the vessel is allowed to warm to ambient temperature.
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Bennett Henry A.
Kilner C.
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