Apparatus and method for mixing by agitation in a multichambered mixing apparatus including a pre-agitation mixing chamber

An apparatus for mixing by agitation comprising:

• a casing having a flow channel through which may pass a fluid;
• an agitation body consisting of a shaft installed in said casing and connected to a vibration source, and one or more agitation blades attached to the perimeter of the shaft, a filter being installed in said casing so as to enclose said agitation body;
• at least two inlets for feeding a liquid or a powder into said casing,
• a plurality of agitating chambers separated from other regions in said casing by divider plates in a state capable of communicating with the other regions,
• a filtered drain port from which a mixture filtered by said filter is drained, and
• an unfiltered drain port from which a mixture incapable of being filtered by said filter is drained, wherein
• the unfiltered drain port is connected to an open/close valve which opens when an internal pressure at the unfiltered drain port reaches to or goes beyond a predetermined value, or an open/close valve which opens at regular time interval,
• at least one of the plurality of agitating chambers is a pre-agitation mixing chamber to which the at least two inlets are attached, and
• a portion of the agitation blades are positioned in the pre-agitation mixing chamber on the agitation body and are provided in such a manner that the shape of the agitation blades and/or the agitation area of the agitation blades can be changed according to the degree of agitation desired.