The function of glass-lined impeller agitator

The glass-lined impeller type (internationally known as the three-blade swept back type) agitator also belongs to the radial flow agitator. It is characterized by simple structure, strong output performance, wide application range, and strong main circulation (or volume circulation) for the fluid in the container. When the same main body circulation is reached, its power consumption is smaller than that of staggered and paddle type. It is more suitable for medium and low viscosity materials than anchor and paddle agitators.

The agitator is used to make the fluid generate circumferential and radial motion under the push of the blade, which can provide strong shear force, promote the refinement and mixing of bubbles and droplets, expand the contact surface of the two, and speed up the heat and mass transfer process. The disadvantage is that the shear provided is not uniformly distributed in the container. In the high shear zone near the impeller, the bubbles or droplets are very fine, while in the low shear zone far away from the impeller, the bubbles or droplets condense into large bubbles or droplets.

The rotation of the blade makes the liquid produce centrifugal force, which will throw the liquid to the container wall, form upward and downward circulation liquid flow, and improve the thermal conductivity of the liquid and the jacket wall λ 2。 However, at the same time, the materials in the container are divided into two circulation zones on the upper and lower sides of the impeller, which has an impact on the overall mixing of materials in the kettle.

The impeller agitator has a wide range of applications. It is equipped with appropriate baffle, suitable for mixing, heat conduction, polymerization, emulsification, gas absorption and suspension, and can achieve better mixing effect. Moreover, the discharge of unit power is larger than that of staggered and paddle type, which makes the liquid have larger main circulation volume and turbulence intensity, and is suitable for occasions requiring strong mixing. In a word, the impeller agitator has good effects on homogeneous mixing, solid-liquid suspension, gas-liquid mixing, heterogeneous dispersion and other operations. Its characteristics are that it can form a much larger main circulation than anchor type and paddle type, and it also has a strong shear effect. When the same main body circulation is reached, its power consumption is smaller than that of anchor type and paddle type. The agitator is particularly suitable for the mixing of non-Newtonian fluids (non-Newtonian fluids refer to materials whose viscosity will change during the mixing process).