Our company's "agitator suitable for ultra-high viscosity polymerization systems" [CN208482461U] has been authorized by the state. In recent years, the progress in the field of polymer materials has promoted the further development of high viscosity fluid agitation equipment, and polymerization reactions are typical reactions of high viscosity (100-500Pa. S) fluids or ultra-high viscosity (≥ 500Pa. S) fluids, some of which are accompanied by harsh conditions such as high temperature, high pressure, or high vacuum, making them almost the most difficult in all industrial reactions. For industrial polymerization production, the quality and production cost of polymers not only depend on the polymerization reaction process, but also on the structural type of the polymerization reactor. This [CN208482461U] provides a stirrer suitable for ultra-high viscosity polymerization systems. The internal and external screw belt stirrer device with coaxial settings can not only solve the problem of polymer agglomeration causing mixing function failure during the polymerization reaction of ultra-high viscosity materials, but also solve the problem of difficult discharge of ultra-high viscosity materials. This compensates for the shortcomings of traditional mixing devices in handling ultra-high viscosity materials, such as uneven mixing, clumping, and inability to produce materials. The main features are as follows:

1. Taking advantage of the independent characteristics of the two sets of mixing systems in a coaxial mixer and the suitability of the inner and outer screw belts for high viscosity applications, the structure of this equipment is designed by organically combining the two. The internal and external screw belts are separated by an internal and external mixing shaft and two independent transmission systems. The internal and external screw belt agitator operates independently at different speeds and directions. The internal and external screw belts are designed to push the material on the kettle wall upwards under their respective turns, while the internal screw belt pushes the material in the center of the kettle downwards, thus forming an up and down circulation of the entire kettle material. There are few dead zones inside the kettle, which can prevent ultra-high viscosity (≥ 500Pa. S) polymers from clumping and causing mixing function failure.

2. Remove the pull rod in the middle of the inner and outer screw belts of the screw belt mixer, and only fix one pull rod at each end of the screw belt. The benefits of doing so are: 1. Due to the design of the outer screw blade without a pull rod in the middle, it provides space for the independent operation of the inner screw agitator; 2. Reduce the internal components of the equipment, eliminate material accumulation factors, and prevent materials from clumping together easily. 3. Without the obstruction of a pull rod, internal and external materials can be mixed smoothly up and down.

To solve the problem of difficult discharge of ultra-high viscosity materials, the lower head of the equipment was changed from the commonly used elliptical head or 120 ° conical head to a 90 ° conical head. In order to prevent material accumulation caused by dead corners at the discharge port, the discharge port and discharge flange are designed to smoothly transition, allowing materials to pass through the discharge port smoothly without residue. Some ultra-high viscosity polymers have poor flowability, sticking to one place like dough and staying there. Without external force, they will not flow out of the discharge port on their own. For this purpose, the device is equipped with spiral blades at the bottom of the internal spiral belt mixer. The gap between the blades and the discharge port and discharge pipe is very small, equivalent to a spiral conveyor, which forcibly pushes the material downwards, solving the problem of difficult discharge of ultra-high viscosity materials.