초록 ▼

Cold anhydrous ammonia, preferably cold liquid anhydrous ammonia at substantially ambient or atmospheric pressure is applied to feed grains, forages and anaerobically fermentable plant material to supply thereto and provide therein non-protein nitrogen (NPN). The cold anhydrous ammonia is obtained b

Cold anhydrous ammonia, preferably cold liquid anhydrous ammonia at substantially ambient or atmospheric pressure is applied to feed grains, forages and anaerobically fermentable plant material to supply thereto and provide therein non-protein nitrogen (NPN). The cold anhydrous ammonia is obtained by supplying a stream of ambient temperature, pressurized anhydrous liquid ammonia to an expansion chamber for expansion therein to provide the cold anhydrous ammonia. Cold anhydrous ammonia, preferably substantially only cold liquid anhydrous ammonia, is recovered from the expansion chamber operated under substantially adiabatic conditions, at a temperature in the range -30°F. to about -17°F. and at substantially ambient or atmospheric pressure, such as at a pressure in the range 1 pound per square inch below atmospheric pressure up to about 5 pounds per square inch atmospheric pressure.

대표청구항 ▼

A expansion chamber useful for the substantially adiabatic expansion of ambient-temperature, pressurized anhydrous liquid ammonia to produce separate streams of cold ambient or atmospheric pressure gaseous anhydrous ammonia and liquid anhydrous ammonia comprising a closed expansion chamber provided

A expansion chamber useful for the substantially adiabatic expansion of ambient-temperature, pressurized anhydrous liquid ammonia to produce separate streams of cold ambient or atmospheric pressure gaseous anhydrous ammonia and liquid anhydrous ammonia comprising a closed expansion chamber provided with two outlets, one outlet being useful for the withdrawal of cold gaseous anhydrous ammonia and the other outlet being useful for the withdrawal of cold anhydrous liquid ammonia, said outlet for the withdrawal of gaseous ammonia being located at one end of said chamber and said other outlet for the withdrawal of liquid ammonia being positioned at the other end of said chamber, conduit means associated with said expansion chamber for introducing thereinto a stream of ambient-temperature, pressurized liquid anhydrous ammonia for expansion therein to produce cold gaseous ammonia and cold liquid ammonia at substantially ambient oR atmospheric pressure, said conduit means for the introduction of said stream of ambient-temperature, pressurized liquid ammonia into said expansion chamber being provided with an outlet, said outlet being positioned intermediate said gaseous ammonia and said liquid ammonia outlets, a first baffle plate fixed to said conduit means below said outlet provided by said conduit means, said first baffle plate providing a first annular space between the periphery thereof and the inside of said expansion chamber and a second baffle plate fixed to said conduit means, said second baffle plate providing a second annular space between the periphery thereof and the inside of said expansion chamber and being fixed to said conduit means and located within said expansion chamber intermediate the outlet for gaseous ammonia and said outlet provided by said conduit means.