Pressure Drop in a FILTER VESSEL

[andrea_91]

Good morning to everyone,

I am working in a chemical plant in which we use a filter vessels (a metallic column with a filter in the bottom end) full of a polymer powder (with different particle size). The dimensions of the vessels are very small (height 1.4 m / diameter 0.2 m).

With a CODIP PUMP we pump inside the filter a liquid dispersion with a pressure of 4 bar, flow rate of 0,8 l/min.

I'm asking you if you some equations that I can use for the modelization of the process [Ergun Equation?].

Thank you very much

 

[jari001]

I don't follow the process description. You filter out polymer particles in the liquid dispersion by passing it through the filter at the end of the column? I think a P&ID or a sketch of the complete process will help the forum members better help you.

 

[ashtree]

What is it that you want to model?

If you want to model the filter friction factor the Ergun equation will be difficult to use because you have polymer powder of different sizes. The Ergun equation uses as an input the equivalent spherical diameter of the packing. Ergun also uses the media oid ratio which is probably also unknown.

Depending on what you want to model and what variables you have you could get some useful information from the following:

1|) Flow rate versus pressure drop.
2) Fluid temperature versus flow rate and pressure drop
3) Filter run time versus pressure drop and flow rate



Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

 

[choack]

Hi,

I'm not an expert in filter vessel with polymer powder but I can suggest just getting from brochure from vendor that is nearest to your application. Then add a generous amount of margin. You may contact vendors directly for more precise pressure drop vs flow curve.

SAMPLE

http://www.pall.fr/pdfs/Fuels-and-Chemicals/GDS110.pdf