high speed disperser manufacture China

Agitation of highly viscous fluids usually refers to the mixing of miscible highly viscous liquids. The application of high viscosity fluids in industrial production is increasing day by day. Many polymers are high speed disperser manufacture, and many of them are non-Newtonian fluids. During the mixing process, the viscosity will change, so the requirements for the mixer are higher, and the mixer is required to be able to adapt to the change of viscosity to complete the mixing operation. However, there are many heterogeneous operations in the industry, such as dispersion, solid dissolution, chemical reaction, and so on.

Double screw belt screw type

During the mixing operation, it is not difficult to cause turbulence to the low viscosity mutual solution with a stirrer However, when the viscosity reaches a high level, only laminar flow can occur due to the influence of viscous force. It is especially difficult that this laminar flow can only occur near the agitator, and the high viscosity liquid slightly away from the blade is still static. In this way, it is difficult to cause the circulating flow of liquid in the mixing equipment, that is, there will be a dead zone in the equipment, which is very unfavorable to the mixing, dispersion, heat transfer, reaction, and other mixing processes.

Therefore, the primary problem of high viscosity liquid mixing is to solve the problem of fluid flow and circulation. In this case, the circulating flow of the agitator cannot be increased by increasing the stirring speed, because when the fluid viscosity is high, the flow discharged from the agitator is very small, and if the rotating speed is too high, a ditch flow will be formed in the high viscosity solution, while the surrounding liquid is still a dead zone. A more effective solution is to try to make the agitator drive a wider range of fluids. Therefore, the ratio of agitator diameter to equipment inner diameter and the ratio of blade width to equipment inner diameter of high viscosity liquid is required to be relatively large. Sometimes, it is required to increase the number of layers of the agitator to increase the mixing range.

Jacking type

From the mixing mechanism, when mixing high viscosity liquid in the laminar flow zone, the liquid unit is elongated, thinned, or segmented by shear subdivision, and gradually reaches mixing with the increase of shear time. At the same time, because the shear field in the mixing equipment is not uniform, for example, the gap area between the anchor and the kettle wall of the anchor agitator is a strong shear area, and the mixing rate of the liquid is faster, while the middle area of the kettle is a low shear area, and the mixing rate is slower.

Therefore, the liquid exchange rate between the high shear area and the low shear area or the circulation capacity of the liquid in the kettle are also important factors affecting the mixing. In addition, the velocity fluctuation of the fluid in the equipment can also promote mixing. In other words, the mixing rate of high viscosity liquid mainly depends on the relative movement rate between the agitator and the kettle wall surface and the distance between them. Therefore, it is also required to use the agitator for high viscosity liquid, and the ratio of agitator diameter to equipment inner diameter is quite large. In the actual production process, the commonly used viscous fluid agitators include anchor agitators, spiral belt agitators, frame agitators, etc.

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