Separator Vessel Nozzle Velocity and Momentum

One free standard that is available is the NORSOK P-100


Katmar Software
Engineering & Risk Analysis Software

bmp28,

The DEP reference is 31.11.05.11-Gen which gives rho-v2 limits identical to those you quote (december 1996 revision).

It's very conservative.

hello bmp28,

beside the rov^2 a very useful design is a tangential inlet.

regards,
roker

So is separation efficiency reduced if momentum is above these guidelines? or are the concerns excessive pressure loss and erosion?

Regards,

skyP

Please note that kg/(ms[sup]2[/sup]) = N/m[sup]2[/sup] = Pa, a pressure unit.

Wear by erosion depends on the impacting particle velocity and the angle of impingement. At a 20[sup]o[/sup] angle erosion may already be considerable.

For liquid droplets impinging on a solid surface at 90[sup]o[/sup] the pressure on impact is:


where:

p = pressure on impact [Pa];
[ρ] = liquid density [kg/m[sup]3[/sup]];
v[sub]s[/sub] = sound velocity in liquid [m/s];
v = liquid droplet velocity [m/s].

As an example, for water droplets travelling at 100 m/s,


Wear by impact can form holes or pits, and may even cause fracture if the material is brittle. This is a subject covered -among others- in tribology engineering books.

The following threads and the links therein may show to be helpful with regard to corrosive-erosive wear of piping:

thread794-57906
thread378-66050
thread378-64478
thread378-30500
thread338-23463
thread124-70976