There are mainly the following types:
①Propeller agitator
It is composed of 2 to 3 pusher propeller blades. The working speed is high and the blades are The peripheral speed of the outer edge is generally 5~15m/s. The propeller mixer mainly produces axial liquid flow and produces a large circulation volume. It is suitable for mixing low viscosity (<2Pa·s) liquids, emulsions and solids. Suspensions with a 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 asymmetrical, which can increase turbulence and prevent the liquid level from sinking.
②Turbine agitator
It is composed of 2 to 4 straight 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, the peripheral speed is generally 3~8m/s. The turbine causes highly turbulent radial flow when rotating, which is suitable for the dispersion of gases and immiscible liquids and the liquid-liquid phase reaction process. The viscosity of the stirred liquid generally does not vary. More than 25Pa·s.
③Paddle mixer
There are two types: flat paddle type and inclined paddle type. The flat paddle mixer is composed of two straight blades. The ratio of blade diameter to height is 4 to 10, and the peripheral speed is 1.5 to 3 m/s, resulting in a small radial liquid flow velocity. The two blades of the inclined paddle mixer are reversely bent at 45° or 60°, resulting in Axial liquid flow. The paddle mixer has a simple structure and is often used for mixing low-viscosity liquids and dissolving and suspending solid particles.
④Anchor mixer
Outer edge of the paddle The shape should be consistent with the inner wall of the stirring tank, with only a small gap in between. It can remove the viscous reaction products attached to the tank wall or the solid matter accumulated at the bottom of the tank, and maintain a good heat transfer effect. The peripheral speed of the outer edge of the paddle is 0.5~1.5m/s, and can be used to stir Newtonian fluids and pseudoplastic fluids with viscosity up to 200 Pa·s (see viscous fluid flow. Only when stirring high-viscosity liquids, there will be a large stagnation area in the liquid layer.
⑤ Ribbon agitator
The outer diameter of the ribbon is equal to the pitch. It is specially used to stir high-viscosity liquids (200~500Pa·s) and pseudo-plastic fluids, usually in a laminar flow state. Operation.
⑥Magnetic stirrer
Corning digital heater has a closed-circuit knob to monitor and adjust the stirring speed. The microprocessor automatically adjusts the motor power to adapt to water quality and viscosity. Solutions and semi-solid solutions.
⑦Magnetic heating stirrers
Corning digital heating stirrers come with an optional external temperature controller (Cat. No. 6795PR), they also The temperature in the container can be monitored and controlled.
⑧Blade-type stirrer
Choose the corresponding stirring according to the physical properties, capacity, and stirring purpose of different media,]? Chemical reaction speed and improving production efficiency can play a big role. Folding blade turbine agitators are generally suitable for gas and liquid phase mixing reactions, and the agitator rotation speed should generally be selected to be above 300r/min.
⑨ Frequency conversion double-layer mixer
The base, support rod and motor of the frequency conversion mixer are fixed into one body using patented technology. Patented chuck, no looseness, no swing, no falling off, safe and reliable. Chrome-plated support rod , thick at the bottom and thin at the top, with strong rigidity and reasonable structure. It has the advantages of easy movement and light weight. It is suitable for all kinds of small containers.