Dispersing device and defoaming device

A dispersing device comprising:

• a casing having at least a liquid inlet opening that is an inlet for a liquid;
• a rotating body pivotably attached to a rotating shaft and rotating around the rotating shaft, the rotating body having first and second ends outwardly opposite to each other along a rotating axis of the rotating shaft, the rotating body being accommodated in the casing, the second end being located closer to the liquid inlet opening than the first end;
• a liquid channel having:
• a passage opening through which the liquid supplied from the liquid inlet opening passes on the second end of the rotating body;
• and
• a segment extending radially outwardly from the rotating axis along a direction from the second end toward the first end of the rotating body in an interior of the rotating body, a cross section perpendicular to the rotating axis of the segment being annular, an outer diameter of the cross section of the segment next to the first end of the rotating body being larger than an outer diameter of the cross section of the segment next to the second end of the rotating body;
• at least one connecting hole provided in the rotating body configured to connect the liquid channel with an exterior of the rotating body on a downstream side of the liquid channel;
• and
• an interspace channel formed between an outermost periphery of the rotating body and the casing, the interspace channel being in fluid communication with the at least one connecting hole, the interspace channel being configured to exert a shear force on the liquid passing therethrough to disperse particles in the liquid.