Perforated Pipe Distributor Design for diffusion of gas in a aqueous solution

[Luisa89]

Hi everyone.
please, I need some help for a project I am working on. My collegues and I are designing a pharmaceutical vessel for the preparation of injectable solutions. Now we need to design a gas sparger (in particular, Nitrogen sparger). The only data we have are the gas flow rate (25 Nm3/h), the nitrogen conditions (Patm and T=20 °C) and size of the pipe feeding the nitrogen (3/4"). Our unknown values are the length of the sparger, the number of holes and the diameter of holes. I have searched everywhere, first of all in Perry's, but I have found only the formula for DeltaP calculation through a perforated-pipe.
Please, could you help me for solving this problem and optmize the design of the sparger?

Thanks for your kindness and your help.
Luisa

 

[EdStainless]

People put this into a spreadsheet and solve by relaxation.
They pick a value for one (what is the smallest hole practical to drill) and then iterate until they get convergence.
Not a big deal, the answer isn't exact anyway.
But as mentioned above, heating the solution and pulling even a modest vacuum will greatly speed (10x) the process.

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P.E. Metallurgy, consulting work welcomed

 

[don1980]

If distributor performance is critically important, then you'll have to do some experimental testing. Calculations can't reliably produce in a design that meets performance requirements.

 

[pierreick]

Hi Luisa,
I cannot offer more . Read my last reply , you need to perform calculation then do some trial to reach the optimum performance .
If this is of great importance for your process , you should consult Vendor like Morton I suggested to you .For this case you need to prepare a spec sheet and submit to them to get a quote .
Good luck
Pierre