Problems with the concentration of phosphoric ammonium slurry
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What materials are generally used for phosphorus ammonium slurry heaters? What are the inlet and outlet temperatures of the slurry?
The overall heat transfer coefficient of our plant is K1 = 600 W/m2·K. The pressure of the heating steam is 0.3 MPa (gauge pressure), and its temperature is 143°C. The flash chamber operates at atmospheric pressure. The slurry contains 27.5% water, and its boiling point is 108°C℃
Heaters made of graphite can be used; they offer good heat transfer performance and high corrosion resistance
Thank you very much. Then what material is used for the concentration heater of your slurry? Graphite or 316L? :handshake
I saw in the information that stainless steel is used, while graphite is used for phosphate concentration; I’m not very familiar with this aspect. . . . . .
The tube material of the phosphoric ammonium slurry concentration and heating unit is 316L, while graphite is used for phosphoric acid concentration
It’s hard to specify the inlet and outlet temperatures of the slurry; they vary between the first and second stages. The inlet and outlet temperatures also differ in a two-stage concentration process compared to a three-stage one. If we can clarify this, we can discuss it together.