Rotational flow enhanced axial separator of coal mill

The utility model relates to a rotational flow enhanced axial separator of a coal mill, which is characterized in that the inner side surface of a central airflow pipe of the axial separator is provided with a rotational flow external thread, the upper port of the central airflow pipe is provided with a rotational flow blade, and pulverized coal airflow rising from the central airflow pipe can generate preliminary rotational flow under the action of the rotational flow external thread; pulverized coal airflow upwards passes through the rotational flow blades at the end opening to generate secondary rotational flow, after flowing out of the center airflow pipe, the pulverized coal airflow is blown to the rotational flow blades at the lower end of the inner cone to generate third rotational flow, the pulverized coal airflow enhanced through the multi-stage rotational flow enables coarse-particle pulverized coal to be separated towards a low-speed area of the pulverized coal discharging channel under the action