Equipment material selection
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Dear seniors: Seeking help, urgently! ! Operating conditions: pH ≥ 11; ammonia nitrogen: 11 g/L; alkalinity: 19.5 g/L; temperature: 105 degrees. Question: For the ammonia distillation tower, what is the material of the tower trays? ； Which materials are best for the tower body?
Plate material； Tower material ； It is recommended to use 1Cr18Ni9Ti (i.e., stainless steel grade 321)
An equipment with a PTFE-lined tower can also be chosen; its specific features are as follows: 1. It is resistant to strong acids and strong bases, with a pH range of 1–14. 2. It can resist the penetration of small molecular gases, including oxygen, carbon dioxide, chlorine, and oxychlorine gases. 3. High purity; the precipitation rate is extremely low, meeting the purity requirements of the photovoltaic industry. 4. Excellent electrical properties. 5. Wide operating temperature range, from ultra-low temperatures to 150°C. 6. Good weather resistance. 7. Flame retardant (oxygen index greater than 52%), and less prone to burning than traditional fluoroplastics. 8. Its surface is extremely smooth; it has the smoothest surface among all fluoroplastics, with a very low coefficient of friction. 9. Strong mechanical properties: it is harder and more robust than traditional fluoroplastics, with better wear resistance.
I’m waiting patiently for an expert; I don’t know how to choose the materials either.
Thank you, senior. The problem is that PTFE is quite expensive, and equipment manufacturing also needs to be taken into account (with very little flexibility), so it’s a real challenge. Later, after doing some research, I chose *ao acid-resistant stainless steel Ky701.
Time was tight, so I had to look up information on my own; eventually I chose the 00Cr19Ni12 (Ky701) *ao acid-resistant stainless steel.
The price of tetrafluoride is fine! I do this
It’s a bit high! ~~~~~~~~~~~~~~~~~~~~~~~~~~~