What are the types of mixers?

Blender is a machine that is used in industry and in our daily life. The main function of this machine is to evenly fuse two media, whether it is solid, liquid or gas. Use a stirrer to stir. There are many types of agitators on the market, and the effects of using them are also different. At present, there are still many problems with agitators that need to be solved. The following editor will introduce to you what types of agitators.

Type of blender:

①Propeller agitator

It is composed of 2 to 3 propeller blades (Figure 2), the working speed is relatively high, and the peripheral speed of the outer edge of the blade is generally 5 to 15m/s. The propeller stirrer mainly causes the axial liquid flow and produces a larger circulation volume. It is suitable for stirring low-viscosity (<2Pa·s) liquids, emulsions and suspensions with a solid particle content of less than 10%. The rotating shaft of the agitator can also be inserted into the tank horizontally or diagonally. At this time, the circulation loop of the liquid flow is asymmetric, which can increase turbulence and prevent the liquid surface from sinking.

② Turbine agitator

It consists of 2 to 4 flat or curved blades installed on a horizontal disc. The ratio of the outer diameter, width and height of the blade is generally 20:5:4, and the circumferential speed is generally 3-8m/s. The turbine causes highly turbulent radial flow when rotating, which is suitable for the dispersion of gas and immiscible liquids and the liquid-liquid reaction process. The viscosity of the liquid being stirred generally does not exceed 25Pa·s.

③ Paddle stirrer

There are two types: flat paddle type and inclined paddle type. The flat paddle agitator consists of two straight paddles. The ratio of the diameter of the blade to the height is 4-10, and the circumferential speed is 1.5-3m/s, and the radial liquid flow velocity generated is relatively small. The two blades of the oblique paddle agitator (Figure 4) are turned by 45° or 60° in opposite directions, thereby generating an axial flow. The paddle agitator has a simple structure and is often used for mixing low-viscosity liquids and dissolving and suspending solid particles.

⑤ Spiral stirrer

The outer diameter of the spiral ribbon is equal to the pitch, which is specially used for stirring high-viscosity liquids (200～500Pa·s) and pseudo-plastic fluids. It is usually operated under laminar flow.

⑥ Magnetic stirrer

The Corning digital heater has a closed-circuit knob to monitor and adjust the mixing speed. The microprocessor automatically adjusts the motor power to adapt to the water quality, viscous solution and semi-solid solution.