Separator design
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Dear teachers, may I ask what separation technology is required when using ammonia in an ammonia cooler? This post was last edited by chinazwr on 2009-4-30 06:30]
This won’t work; I’ll ask someone else instead
The question isn’t clear, and the purpose behind it is unclear either – how am I supposed to answer?
A high-position cyclone separator + an inlet separator for the ice machine is sufficient
It turns out that the old designs mostly used inertial separation; I’m not sure what method is being used in the new ones.:L
What is it separating? Ammonia and oil? Ammonia and water again?
No, this is exactly the graduation project I’m working on right now. I don’t know what needs to be calculated in terms of process engineering; I’m in a hurry. Please help me out, guys. Thank you. I need to design an entire molecular distillation unit, with molecular distillation being the main component. There aren’t many other elements involved, such as process calculations or strength calculations for verification. I can handle the calculations related to strength and stiffness later on, but I don’t know how to do the process design part – I haven’t studied process design; my major is chemical engineering machinery. Thank you everyone.
I’m not good at doing process calculations; do you know how to do that? Could you give some guidance? My current graduation project involves designing a molecular distillation system. But it really can’t be considered a craft.
It is essentially an ammonia liquid separator, and such technologies are now quite mature. There are also many types of ammonia liquid separators, such as those using packing or centrifugal methods, among others
This post was last edited by chinazwr on 2009-5-2 at 16:48. 6# The pressure drop of the shijia cyclone separator is too high; it may not be suitable for this application. Moreover, ammonia is a chemical hazard, and too high a flow rate is unsafe. Since cyclone separators use centrifugal force for separation, if the flow rate is too low, their separation efficiency becomes very low.
I recommend considering a mesh demister. Mesh demisters have a high separation efficiency, especially when the droplets involved are very small; the mesh also has a certain coalescing effect, which makes it easier to separate larger droplets. Additionally, if the liquid carrying moisture appears at the outlet of the ammonia evaporator or at the inlet of the ammonia compressor, the pressure drop across the separator is reduced, resulting in lower pressure losses in the system and thus helping to save energy.