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| |...|....| |***| |........| |
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| |........|$$$$$|....|...| |
| |........|$$$$$|....|...|--|
| |...+====|$$$$$|====+....\ |
| |...|....|$$$$$|..........||---\
| |...|....|$$$$$|.......MMMMM +-
| |...+===========================================
| |........\$$$$$/.......WWWWW +-
| |.........\$$$/...........||---/
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..... Acetone / DryIce
| | Gatoraid cooler
+---+ 1/4" Polypropalene tubing
MMMMM Polypropalene fitting
$$$$$ Amonia Sulphate / Lie
/| Bug sprayer
***** Lie
If you notice the system is not closed, there is a single path for gas to escape the generator... through the 1/4 tube which passes out through a liquid tight fitting where the spigot once stood. To escaping out the tube, gases must first pass through the drying chamber inside of the bug sprayer. The only way into the drying chamber is through its perforated bottom. Filter paper keeps the lie, which fills the drying chamber, from falling through the holes. CO2 will sublime from the dryice/acetone slush on the outside of the bug sprayer and enter the bug sprayer through the open hole left after removing the sprayer hose and mix with any NH3/H20 vapor reciently produced from the fert/lie reaction and together they pass through the drying chamber where the H20 is removed and then through the 1/4" tubing running through the dryice/acetone slush.
Since the reaction mix is already chilled to a very low temp and the vapor is immediately mixed with the cold CO2 gas, it doesn't take long in a -78deg C 1/4" tube to afford condensation. The steady flow of CO2 then forces the liquid Nh3 through the remainder of the tube and into whatever vessel sits bravely at its end.
Construction is pretty simple and with a couple of exceptions, quite open to substitution. I can picture using a 2L soda bottle in place of the bug sprayer, trading physical evidence for cleanup effort etc...
If you use the sprayer as I did, you simply hacksaw the arm of the hand pump and then remove the pump innerds leaving the outer shell and threaded flang.
Any flat thin plastic can be cut with a hole saw or other convientent hand tool to close off the top of the pump section, held in place by the threaded flang. A hold is drilled into the new plastic cap to attach the 1/4" tubing with a threaded press-2-fit fitting. Another press-2-fit fitting is used to allow the tube to pass out of the 3/4" hold at the bottom of the cooler once filled by the spout. Since the tube must pass through and not terminate at the lower fitting you must use a small file or drill bit to remove the ridge/barrier on the inside of the fitting.
The 1/4 tubing, press-2-fit fittings, bug sprayer and gatoraid cooler are available at hadware depots in most facist contries, for under $40.
To operate the device;
1) fill space outside of sprayer with acetone and dryice
2) fill the inside of drying chamber with lie
3) fill the inside of sprayer with well mixed fert/lie
4) inject small amount of H20 into side port of bug sprayer
5) enjoy the suthing experience of your lungs fring until you close cooler lid
6) be not in the way of the sub-cooled NH3 liquid the spurts out of exit tube
So that's that. Anyone who can't make their own Anhydrous NH3 at home is way too stupid to deserve drugs.