High viscosity fluid processing technology and equipment

It is generally believed that a fluid of less than 5000 centipoise is a low viscosity fluid, a fluid of 5000 to 50000 centipoise is a medium viscosity fluid, a fluid of 50000 to 500000 centipoise is a highly viscous fluid, and a fluid of more than 500000 centipoise is an ultrahigh viscosity fluid. The mixing impeller of the traditional mixing equipment is divided into two categories according to the fluid to be treated, one for low viscosity fluids such as paddle type, turbine type, and the other for high viscosity fluids such as partial frame type, ribbon type, etc. . In addition, conventional rubber and plastic machines such as extruders, kneaders, kneaders, and internal mixers are typical mixing devices for treating ultra-high viscosity liquids.

In the preparation of high-performance polymer composites such as ultra-strong, highly elastic engineering plastics, it is necessary to mix ultra-high viscosity fluid with low-viscosity fluid in a short time; or some high-performance polymers must be high temperature and high. Ultrahigh viscosity fluids can be produced under vacuum conditions; more high materials must undergo a process from liquid phase to solid phase during the manufacturing process. As a result, the company has developed a variety of mixing equipment for handling highly viscous fluids and all-phase mixing equipment that can handle both viscous liquids and powders.

High viscosity fluid process flow diagram

Scraper type evaporation concentration equipment

For the concentration process from low to medium viscosity fluids, the original mixing company developed a scraper type evaporation concentration equipment. The device has a heated cylinder with a stirring device inside, which forms a film along the cylinder wall by stirring, which improves the gas-liquid phase contact area, shortens the gas phase passage, and solves the sticking of the material. Problems, as well as viscous fluid handling processes that are difficult to achieve with conventional thin film evaporators.

Scraper type evaporation concentration equipment

Typical application process:

(1) Pre-removal of residual monomers in a liquid phase bulk polymerization product of a silicone;

(2) The TDI raffinate is concentrated to carry out the next devolatilization to the residue.

High viscosity fluid reaction equipment

For the reaction process of highly viscous fluids and the mixing process of highly viscous and low viscous fluids, the original mixing company has developed a highly viscous fluid reaction device that uses powerful mixing and meshing elements with a large effective reaction volume. It is also highly economical for processes with long reaction times.

High viscosity fluid reaction equipment schematic

Typical application process:

(1) PPC polymerization, the viscosity is very large in the late stage of the reaction, and the kettle type equipment cannot be processed.

(2) A bulk polymerization, the reaction cycle is very long, the viscosity is large in the later stage, there is a phase change after the Zui, and the kettle type equipment cannot be processed.

High viscosity fluid volatile removal equipment

Some bulk polymerization and solution polymerization high viscosity fluids require very low residual amounts of raw materials or solvents in the product. The original mixing company developed a high viscosity fluid volatile removal device. The device provides a large gas-liquid contact area of ​​the Zui, and enhances the surface renewal rate of the high-viscosity fluid by the action of the engaging elements, so that the residual amount of the volatile matter reaches a low level, and the removal time of the volatile matter is also greatly shortened.

Schematic diagram of high viscosity fluid volatile removal equipment

Typical application process:

(1) a high-performance fiber stock solution, removing residual monomers and some solvents in the stock solution;

(2) A PPC plastic, the monomer in the polymer is removed, and granulated by a screw extruder.

High viscosity fluid bubble removal equipment

In some high-performance polymer high-viscosity fluids, too many bubbles or too large a bubble diameter will greatly affect the quality of the product. For this process, the company has developed a high-viscosity bubble removal device. The device enhances the surface renewal rate of the high-viscosity fluid and provides a large contact area, and solves the problem that the bubble is brought into the high-viscosity fluid through the special design of the meshing component, thereby greatly improving the product quality.

High viscosity fluid bubble removal equipment schematic

Typical application process:

Polyacrylonitrile spinning dope, a high performance fiber spinning dope.

Liquid-solid phase change processing equipment

In the process of liquid-solid phase transformation, there will be a phase change point with a large viscosity. Simple liquid phase treatment equipment such as a tank reactor or a powder processing equipment such as a hollow blade dryer (formerly GKJ type) ) can not be handled very well, for this reason, the original company developed a full-phase mixing equipment.

Schematic diagram of liquid-solid phase change processing equipment

Typical application process:

(1) Removal of volatiles in the residual liquid. The residual liquid becomes a residue, and the liquid phase is completely reused. The lower the moisture content in the residue, the better, such as the MDI devolatilization, a certain silicone component in the sodium chloride residue.

(2) Removal of volatiles from the material. The liquid phase in the material is completely removed, and the solid phase is completely reused. The lower the moisture content in the residue, the better, for example, the removal of the protective liquid in a material and the addition of other raw materials.