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Cut diameter and pressure drop for four cyclone configurations.

ConfigurationBody diameter (m)Cut diameter (micrometres)Pressure drop (kPa)
Large conventional1.6180.6
Conventional1.0120.9
High efficiency0.681.9
Multiclone tubes0.2551.5

Why does the multiclone achieve a small cut diameter without the highest pressure drop?

  • A.It uses a fabric insert
  • B.It operates at a lower flow
  • C.Many parallel tubes keep each velocity moderate
  • D.Its tubes are longer

Answer: C

A single tube of that diameter would have to run at a very high velocity to pass the whole flow, but sharing the flow between many keeps each one moderate. Uneven distribution between the tubes is the usual reason such a unit underperforms.

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