The gas–solid separator of
coupling cyclone with a built-in
granular bed filter (GBF) was proposed to capture dust emitted from
the industrial source. The coarse dust was separated by the rotatory
motion, and the fine dust entrained by the swirl was collected by
the GBF. A new geometrical parameter, named as the swirl space ratio,
was introduced to characterize the mutual impacts on the coupled separator.
Experimental results showed that the pressure drop decreased 10% when
the swirl space ratio increased from 0.37 to 0.43, while the collection
efficiency was enhanced significantly. The coupled separator with
a large swirl space ratio exhibited excellent separation characteristics
according to the separation quality factor. Furthermore, the contribution
ratio of the cyclone shell was strengthened by increasing the swirl
space ratio. The variation in the bed voidage and the pressure drop
was completely opposite. The breakage phenomenon was observed in the
circulation of the collector particles.