Please provide some feedback on the calculation of evaporation volume in atmospheric-pressure reaction vessels
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The evaporation rate Gz in the reaction tank is calculated using the following formula: Gz = M × (0.000352 + 0.000786 × V) × P × F. Where: Gz – amount of acid mist, in kg/h； M — Liquid molecular weight ； V — Air flow velocity on the surface of the evaporating liquid (m/s), to be determined based on actual measurement data. During unconditional field measurements, a value of 0.2–0.5 m/s can be used, or it can be calculated by referring to a table ； P — corresponding to the saturated vapor partial pressure in air at the liquid temperature (mmHg) ； F —— area of the evaporation surface, in m2. Operating conditions: In a reactor of the following size, water is heated to 100°C. The amount of water evaporation is calculated using the formula above. Is this result correct? The molecular weight M is 18; it is assumed that V is 0.3 m/s, P at 100°C is 760 mmHg or 101300 Pa. The diameter of the reactor tank is 1.3 m, and the height of the cylindrical section of the jacket is 1.317 m. The area of the cylinder is 5.375994 m². The height of the head (including the straight edges) is 0.35 m, and the area of the head is 1.933 m². The area of the heating surface is 7.308994 m². The amount of evaporation is 58.77238089 kg/h. Is this formula applicable under vacuum conditions? Are there any other calculation methods?
This can’t be right; volatilization and evaporation should be two different concepts, right?
Oh, then what method should be used to calculate the evaporation rate of a reaction kettle? I’d appreciate some guidance. Thank you!
Based on the parameters you provided, once the reactions such as evaporation are complete, it can be calculated by using the actual height of liquid level drop, right? . .
In the initial design, it’s not clear how to handle the situation when the liquid level drops Are there any relevant calculation formulas?
The formula you gave seems to be one for calculating natural evaporation, like placing a basin of water in the shade. ;P, but it seems wrong too – the evaporation rate isn’t related to temperature at all? Your actual conditions have reached the boiling point of water; since the water is boiling, it should be calculated based on the latent heat of vaporization of water and the amount of heat applied.