In the integrated impactor and cyclone apparatus of the present invention, a ring-shaped nozzle type impactor 10, which is accelerated in the radial direction and has an impact direction in a horizontal direction, is used as a pretreatment separator, and a wet axial cyclone (10) and the axial cyclone (20) are directly connected in series without a special device, which is very advantageous in downsizing. It has more efficient characteristics in flow rate.
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