Cyclone separation device and method for smashed material particles according to particle size

The invention provides a cyclone separation device for smashed material particles according to the particle size. The cyclone separation device for the smashed material particles according to the particle size comprises an air inflow pipe used for entering a mixture of gas flow and particulate matter; the air inflow pipe is connected with a cyclone barrel used for making the mixture of gas flow and particulate matter generate cyclones; a cyclone flow guiding core column used for guiding the generated cyclones is arranged in the cyclone barrel; a plurality of expanding-outwards barrels which are coaxial and sequentially increased in diameter are arranged outside the cyclone barrel, and the expanding-outwards barrels are used for collecting particulate matter in different particle sizes whenthe particulate mixture in cyclones are distributed according to the particle size of the particulate matter along with gravity; the expanding-outwards barrels are sequentially heightened from the inner layer to the outer layer; a top cover for sealing is arranged on the top of the expanding-outwards barrel on the outermost layer; and the top cover is provided with a dust sucking pipe used for sucking dust. Compared with the prior art, according the cyclone separation device and method, by utilizing the principle that according to objects of the same energy, the larger the centrifuging diameter, the smaller the centrifuging force, the particulate matter in different particle sizes are gradually and sequentially separated, in this way, the separation speed is high, high efficiency and energy saving are achieved, and operation is easy.