Agitator - equipment or part of equipment for mixing, mixing, dispersing, circulating substances, and also for maintaining uniformity .
As a rule, they are installed in a tank, but there are also portable (portable) ones.
Varieties of capacitive mixers
Capacitive mixers are divided into vertical and side. There are also emulsifier mixers and vacuum mixers.
Vertical mixers
Vertical mixers are installed in the tank from above. In order to prevent the mixing of the product into the circular motion, the vertical mixers are mounted either eccentrically to the axis of the tank, or in the center with the installation of reflective partitions. The principle of operation depends on the type of propeller used.
Side Stirrers
Side mixers are installed in the tank on the side in an inclined position. The rotation of the rotor creates a flow directing the product to the bottom of the tank, and then to the surface along the wall opposite the mixer. The curved bottom of the tank contributes to this effect. The side mixer is mounted decentrally, which stimulates a circular flow. Thus, complete homogenization of the mixed product is achieved.
Vacuum Mixer
The vacuum mixer is a sealed vessel with a mixer mounted centrally from above or from below from below. The main feature of these mixers is the high quality of mixing.
Emulsifier Mixer
Designed for the manufacture of creams and pastes , the design is a sealed vessel with two mixers centrally mounted on top, and they rotate around one axis, but with different speeds. Low speed external agitator 10-60 rpm for centrifugal flow. High speed internal mixer for homogenizing the medium. The most modern solutions at the moment are combinations of the above solutions.
Laboratory stirrers
As a rule, a vertical stirrer made of bent glass rod with electric drive is used. A magnetic stirrer can be used to work in a sealed container: a short glass tube sealed at both ends with a magnetic core inside is inserted into the container, rotated by a magnetic field through the bottom of the vessel.
Classification
According to design features, mechanical mixing devices are divided into three two groups: high-speed and low-speed [1] .
High Speed ββMixers
High-speed are paddle, propeller, turbine mixers, for which the peripheral speed of the ends of the blades is about 10 m / s, and the ratio of the diameter of the apparatus to the diameter of the mixer exceeds 3.
Slow Mixers
Slow-moving are anchor, frame mixers, for which the peripheral speed of the ends of the blades does not exceed 1 m / s, and the ratio of the diameter of the apparatus to the diameter of the mixer is less than 2.
See also
- Mixer
- Mixer
Notes
- β Gusev Yu. I., Karasev I.N., Kolman-Ivanov E. E. Design and calculation of chemical production machines. - M., Mechanical Engineering, 1985. - S. 265 - 284