151 and a hole not illustrated of the hollow shaft is aligned with the engaging groove of the housing and the bolt or the pin is passed through and engaged and then the nut is tightened thus interconnecting the hollow shafts when the bolt is passed through with the aid of the engaging groove formed at the housing 151 and the nut is tightened the widened vertical cut away groove 150 will be closed thus reducing the diameter of the housing 151 whereupon the hollow shafts 120 can be more strongly covered fig5 is a disassembled perspective view illustrating an impeller of a disperser according to the present inventive concept fig6 is a perspective view illustrating an impeller body of a disperser according to the present inventive concept and fig7 is a perspective view illustrating an impeller when viewing from the bottom of the impeller according to the present inventive concept as illustrated in fig5 and 6 the impeller 140 of the disperser 100 according to the present inventive concept may include but is not limited to a circular plate shaped body 141 wherein a plurality of wings 144 are disposed at a lower surface thereof in a circumferential direction and upper and lower circular plate shaped guide wings 142 and 143 which are installed at the upper and lower portions of the body 141 a plurality of suction ports 145 passing through from top to bottom are formed at the lower guide wing 143 it is preferred that a plurality of the suction ports 145 are disposed at regular intervals in the.