Oil Skimmer tank design - Nutshell filter Design

[TOLGAUS]

If I were you I would obtain my oil particle size distribution curve first. This will dictate all restriction & constraints in your design. if your feed does not change with respect to water chemistry, then you an proceed. Otherwise, you need to provide maximum residence time possible with calming baffles. I really recommend calming buffles (OPUS maxim is expert in this). Then i would recommend internal inlet flow devices. The weir height is a very important concern in these devices; keep it as high as possible. Move the weir as far from the inlet as possible. use vortex breakers for the water outlet. Finally verify your design with CFD analysis. Then you are done almost.

[mattegm]

If I were you I would obtain my oil particle size distribution curve first. This will dictate all restriction & constraints in your design. if your feed does not change with respect to water chemistry, then you an proceed. Otherwise, you need to provide maximum residence time possible with calming baffles. I really recommend calming buffles (OPUS maxim is expert in this). Then i would recommend internal inlet flow devices. The weir height is a very important concern in these devices; keep it as high as possible. Move the weir as far from the inlet as possible. use vortex breakers for the water outlet. Finally verify your design with CFD analysis. Then you are done almost.

Hi tolgaus,
first of all: the hydrocyclone downstream the oil skimmer are designed to reduce from 1000 ppm to 25 ppm of oil. The 1000 ppm is also the inlet basis of design of the oil skimmer so, at the end, the oil skimmer is not really necessary. But the client want it as ""safety issue" so we have to provide them.
For this reason we decided, with the client, to design the oil skimmer only with a sufficient time of residence.

I agree with you to use calming baffles and the maximum residence time possibile. Do you think a vessel of diameter 2400mm and 10000mm long with sufficient baffles will be ok to do this work? I remind that the purpose of the oil skimmer is only for safety, the downstream equipment can foresee the specification also without the oil skimmer.

Thank you tolgaus, if you agree i will ask you more as soon as i proceed qith the basic design..
thanks