Process and apparatus for producing and using cold ammonia

Refrigeration – Storage of solidified or liquified gas – Including cryostat

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Details

55191, 71 61, 111 7, 159 6R, 426 69, F17C 702

Patent

active

040690296

ABSTRACT:
Cold ammonia, preferably cold liquid anhydrous ammonia at substantially ambient or atmospheric pressure is applied (1) to the soil as a fertilizer and (2) to feed grains, forages and anaerobically fermentable plant material to supply thereto and provide therein non-protein nitrogen (NPN). The cold ammonia is obtained by (1) introducing a stream of ambient temperature, pressurized liquid ammonia at a velocity of at least about 5000 feet per minute into an expansion chamber, (2) imparting a high velocity spinning motion to the liquid ammonia entering the chamber such that rapid flow is produced around the interior of the chamber to thereby provide rapid separation of the liquid and gaseous ammonia formed in the chamber. Cold ammonia, which is predominantly in the liquid form, is recovered from the expansion chamber operated under substantially adiabatic conditions, at a temperature of about -28.degree. F.

REFERENCES:
patent: 2843534 (1958-07-01), Harper
patent: 3753723 (1973-08-01), Henderson et al.
patent: 3913340 (1975-10-01), Hurley
patent: 3978681 (1976-09-01), Kjelgaard et al.

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