Centrifugal blowers-dust collectors (BD) combining the functions of aerodynamic pressure equipment and solid-phase separator from the gas stream possess obvious advantages like compactness, universal applicability, and low power consumption. A comparison of the technoeconomic indexes of rotary dust traps shows that the efficiency of separating fine dust in the BD under study is not inferior to that of the CRDT with a slit chamber, the power consumption for cleaning 1 m**3/sec of gas in the BD being much less. Moreover, the BD is very simple to fabricate and is compact.