APV Dryer Handbook - Umbc

CYCLONE LOSSES
When the cyclone is followed by a scrubber, the determination of cyclone losses
can be further refined by taking a similar set of measurements on the
scrubber liquids.
The scrubber is drained before the run and filled with clean fluids of known solids
content. The bleed stream must be stopped before the run starts and the scrubber
operation carefully monitored. At the end of the production run, the total volume
of liquid in each stage of the scrubber can be measured. Samples from each
of the stages should be taken for density and solids content determination.
From these results, the total solids collected in the scrubber can be calculated.
These solids can be assumed to have bypassed the cyclones.
For efficient powder collection, a cyclone should have an airtight seal at the
bottom. Any air leakage at the bottom of the cyclone will carry powder away
and out of the top inner cone.
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