Velocity of Flashing Slurry 1

[cawse001]

We are designing a bottom entry flash vessel to drop slurry from 380 kPa to atmospheric pressure.

The choke sits below a slurry pool to assist in reducing the slurry velocity before it impacts onto a target.

I know the steam and slurry velocity at the choke but how do I predict the velocity at the target, i.e. how much does the slurry pool slow down and disperse the steam/slurry mixture over the depth of the slurry?

Any references would be appreciated.

 

[moltenmetal]

My understanding is that in practice, the slurry pool doesn't do as much as you'd think. The flashing slurry produces a conic "hole" in the slurry pool and just blasts straight up at the target, not slowing down as much as one might expect. I understand that a certain HPAL system in Australia had problems with bottom-mounted flash valves for that reason.