production aqua ammonia
production aqua ammonia
(OP)
iam working in ammonia plant how can we design simple unit to product aqua ammonia 1200 ton /month
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RE: production aqua ammonia
RE: production aqua ammonia
so i need any information about the mixing nozzel use or any supplier for unit any information helped me in design of this unit
RE: production aqua ammonia
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
RE: production aqua ammonia
a)Heat of solution for ammonia is negative (i.e there is a chilling effect upon mixing, starting with pure ammonia in the liquid phase)
b) Choose an operating pressure for the mixing operation that will maintain the aqueous am. at above 0degC (say 10degC), so that water doesnt freeze
c) There is of course the auto - refrigeration effect when pure ammonia at high pressure is let down to the pressure of the mixing operation.
c)Refer to charts or diagrams that give you the enthalphy - pressure - temp contours for ammonia solutions. One source for this is Perry Chem Engg Handbook, chapter 2 (see fig 2-7 in the 7th edition)
To avoid 2 phase (vap / liquid) operation at the mixing nozzle, I would keep the operating pressure at above the bubble point pressure of pure ammonia, which would be approx 14-17barg or so.
There may a risk that a process simulation program may not model this chilling effect due to the heat of mixing correctly, so would suggest you do this by manual calcs to start with. If the chilling effect is too much, suggest using vapor ammonia and a packed column operating in countercurrent mode.
RE: production aqua ammonia
mr georgeverghese a.the reaction of aqua ammonia is exothermic so how exothermic and chilling in mixing
RE: production aqua ammonia
It would be preferable to use vapor ammonia as feed, so we are looking at a packed absorber - cooling coils at some intermediate height in the packing will be required to remove the heat of dilution. Mass transfer coefficients and packing factors for ammonia absorption are published in the Norton packings catalogue for example.
RE: production aqua ammonia
is it any reference for that
RE: production aqua ammonia
RE: production aqua ammonia