Question: When using 98% concentrated sulfuric acid to absorb sulfur trioxide exhaust gases, what values should be adopted for the empty tower gas velocity and spray density in the absorption tower?
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I would like to ask everyone: There is a project in which the sulfuric acid storage tank emits some SO3 vapor, and 98% concentrated sulfuric acid is used to absorb this SO3. The volume of gas to be treated is not large, at 800 standard cubic meters. What values should be assigned to the empty-tower gas velocity and the concentration of the concentrated sulfuric acid spray in this absorption tower? The range of gas velocities in towers as reported in the literature is quite wide, ranging from 0.4 to 2.0 m/s. If we calculate it based on 50%-80% of the critical gas velocity, then determining that critical gas velocity requires knowledge of the liquid flow rate, as well as the spray density and tower diameter – all of which are related to gas velocity. I would appreciate some guidance from those with experience. Thank you!
I’m here to learn* as well; why haven’t any experts come to clarify things?
The normal gas velocity in an empty tower is 0.5–0.7 m/s. Spray density 16-18 m3/(m2.h)
The normal gas velocity in an empty tower is 0.5–0.7 m/s. Spray density 16-18 m3/m2.h
Calculate the amount of structured packing to be added based on empirical values of spray density
The selection of the gas velocity in an empty tower is determined by the F factor of your packing. The type of filler is determined by the number of theoretical plates required according to your design specifications. If the number of theoretical plates and the height of the packing are known, the type of packing can be determined. Once the type of packing is known, the diameter of the tower can be found using the F-factor of that packing.
@hu919263: What material is used for the sulfur cycle tank? I hope the original poster can provide some guidance
Use 98% concentrated sulfuric acid to absorb sulfur trioxide exhaust; 98% to 105% sulfuric acid may be introduced into the air in this type of circulation tank operation
The gas velocity in your empty tower is way too low.