A liquid dispersion device of the present invention includes at least one liquid flow member attachable to a rotary shaft. The liquid flow member includes at least one tubular suction portion extending along the rotary shaft and including a suction port at a lower end thereof, and at least one ejection portion extending in a direction inclined with respect to the suction portion and having one end that is in communication with an upper end of the suction portion and the other end that includes an ejection port. An angle .sub.2 between a horizontal direction and an axial direction of the ejection portion at an opening surface of the ejection port is 90.sub.220 with respect to the horizontal direction.

A mixing apparatus includes a material supply line, a mixing tank, a stirring device, and a transportation line. The material supply line supplies two or more kinds of materials including a liquid. The mixing tank accommodates the two or more kinds of materials that have been supplied. The stirring device stirs a mixed solution of the two or more kinds of materials inside the mixing tank. The transportation line transports the mixed solution inside the mixing tank to an outside of the mixing tank. The mixing apparatus maintains a liquid level height of the mixed solution inside the mixing tank at a level falling within a predetermined range by controlling at least one of a supply amount of the two or more kinds of materials to be supplied into the mixing tank and a transportation amount of the mixed solution to be transported to the outside of the mixing tank.

A mixing shaft has a tool holder rotatable about a tool axis and at least one mixing blade. The tool holder includes at least one recess in which a mixing blade portion of the at least one mixing blade is received. A clamping member inserted into the recess is configured to fix the mixing blade portion in the recess. The recess includes a first and a second recess portion. The mixing blade portion is arranged in the first recess portion and the clamping member is arranged at least partly in the second recess portion, wherein the first recess portion and the second recess portion are arranged adjacently in one plane extending perpendicularly to the tool axis.

Disclosed is a mixed reactor and a method for preparing electrothermal film precursor solution based on the mixed reactor. The mixed reactor includes a reaction kettle body, a reflux condensation mechanism, and a multifunctional stirring mechanism. The reflux condensation mechanism includes a condensate tank, a condensing coil is wound around inside of the condensate tank, two ends of the condensing coil are horizontally arranged, and hermetically and rotatably installed on both sides of the condensate tank, the condensing coil is driven by a coil driving motor; the multifunctional stirring mechanism includes a stirring shaft and a plurality of stirring blades driven by the stirring shaft. The bottom of the stirring shaft is fixedly sleeved with an isolation sleeve. Buffer rubber gaskets are hermetically connected between the mounting parts and the installation holes. It can effectively improve the quality of products and the quality controllability during the product preparation process.

A mixer (1) comprises a drum (2) having at least one inlet (6) and one outlet (7). The mixer (1) furthermore comprises a drive (3) and a stirring shaft (4), which is arranged in the drum (2) and is coupled to the drive (3). Furthermore, the mixer (1) comprises a conveying device (5), which is arranged in the drum (2) and which is arranged on one and the same axis as the stirring shaft (4).