Seeking advice on ammonia evaporator issues
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1. Selection of materials for the liquid ammonia side and the water side of the ammonia evaporator, reasons behind this choice, and whether it is necessary to use materials resistant to low temperatures? 2. What temperature can be achieved using ammonia as a refrigerant?
Actual operating temperature? Judge based on the stress condition!
We use Q345R for the shell side, and 20 for the tube side#
Since the other side is water, materials can be selected at room temperature.
Some information I found online mentions that 304 material is used on the liquid ammonia side
Use a plate-type ammonia evaporator; material 304 is certainly suitable. The ammonia side does not require materials resistant to low temperatures – a 304 welded sealed channel will work fine even at minus 80 degrees. If you need it, send me an email and I’ll send you some information for reference
Is it about ammonia removal? Membrane ammonia removal – we can do that to produce saturated sulfuric acid
Check whether it meets the requirements of low temperature and low stress