Static mixer is a kind of high efficiency mixing equipment, which does not have moving parts, depends on the special structure and fluid motion of the mixed unit, and makes the dissoluble fluids dispersed and mixed with each other.
The mixer has the advantages of compact structure, small energy consumption, small investment, large flexible operation, no maintenance and good mixing performance compared with the mixer, colloid mill, homogenizer and Venturi tube. All of the mixers are mixed with liquid - liquid, liquid - gas, liquid - solid, gas and gas, emulsification, neutralization, absorption, extraction, and reaction. Heat transfer and other processes can replace traditional related equipment. It is widely used in oil refining, chemical industry, sewage treatment and other aspects of mixing.
The static mixer is a kind of advanced unit equipment. Unlike the agitator, it has no moving parts inside. It mainly uses fluid flow and internal unit to realize the mixing of various fluids and the special design of the structure. Compared with other equipment such as Kong Banzhu, agitator and homogenizer, the static mixer has high efficiency, low energy consumption, small volume, low investment and easy continuous production. In static mixer, the movement of fluid follows the rule of "split shift overlap", and the main function of the mixing process is displacement. The mode of displacement can be divided into two major categories: "the relative displacement caused by the velocity distribution of the same section and the" multi channel relative displacement ", and the displacement modes of the different types of mixers are also different. The static mixer is not only applied to the mixing process, but also can be applied to the process related to mixing transfer, including gas / gas mixing, liquid / liquid extraction, gas / liquid reaction, heat transfer enhancement and liquid / liquid reaction. Static mixer is widely used in plastics, chemical industry, medicine, mining and metallurgy, food, daily chemical, pesticide, cable, oil, paper, chemical fiber, biology, environmental protection and other industries. Because the product has low energy consumption, low investment, good results and quick results, it has brought considerable economic benefits to users.
The working principle of the static mixer is to let the fluid flow in the pipeline to impact various types of plate elements, increase the velocity gradient of the fluid laminar flow or form turbulence, and the laminar flow is "division position moving - reconfluence". When the turbulence is turbulent, in addition to the above three conditions, a violent eddy will be produced in the direction of the section, and it is very strong. The shear force is used for fluid, so that the fluid is further partitioned and mixed, and finally mixed to form the desired emulsion. It is called static mixer, which means there are no moving parts in the pipeline, only static components.
The mixing process of static mixer is carried out by a series of mixed units with different specifications installed in hollow pipes. Because of the function of the mixing unit, the fluid is revolving at the left, turning right and rotating, changing the direction of the flow mixer, not only to the center fluid to the periphery, but also to the center of the surrounding fluid, thus resulting in a good radial mixing effect. At the same time, the rotation of the fluid itself will occur at the interface of the adjacent components, and this perfect radial circulation is mixed to make the material more uniform. A static mixer is a highly efficient hybrid device without motion. By fixing the inner parts of the mixed unit in the tube, two or more fluids are cut, cut, rotated and remixed to achieve a good dispersion and full mixing between the fluids.
classification
SV type static mixer
The SV type unit is a cylinder composed of a certain size corrugated plate. Its technical characteristics are: the highest dispersion degree is 1-2 mu m, the liquid and liquid phase and gas and gas phase inhomogeneity coefficient are s X < 1~5%. It is suitable for the mixing emulsification of liquid liquid, liquid gas and gas air with viscosity less than 102 CPS, and the process of reaction, absorption, extraction and heat transfer enhancement. DH or less than 3.5 is suitable for the cleaning medium of viscosity less than 102 CPS DN or greater than 5. The application medium can be accompanied by a small amount of non stick impurity.
SK type static mixer
The unit is welded by a spiral piece that is torsional on the left and right of a single pass. Its technical performance is that the maximum dispersion degree is less than 10um, and the liquid to liquid, liquid solid nonuniformity coefficient s X is less than 5%. It is suitable for the chemical, petroleum, pharmaceutical, food, fine processing, plastics, environmental protection, synthetic fiber, mineral treatment and other departments, such as mixing, reaction, extraction, absorption, injection, color matching heat transfer and other processes. It is suitable for small flow and high viscosity media mixed with impurities or viscosity less than 106 CPS.
SX type static mixer
The unit is composed of many X type units by crossing cross bars according to certain rules. The technical characteristics are: the degree of mixed inhomogeneity is s X or less than 1~5%. It is suitable for the medium and high viscosity liquid - liquid reaction, mixing, absorption process or the mixing and reaction process of high polymer fluid, which is less than 104 CP, and the use effect is better when the treatment is large.
The inhomogeneity of the phase is s X < 1~5%. It is suitable for the mixing, emulsification, color matching, injection spinning and heat transfer in fine processing, plastic, synthetic fiber, mining and other departments. It is especially suitable for the medium and high viscosity (less than 106 CP) cleaning medium with small flow and high mixing requirements.
The SL type static mixer unit consists of a single X unit by a cross bar according to a certain rule. The technical characteristics are liquid liquid, liquid solid mixing, and the non uniformity coefficient s X < 5%. It is suitable for the unit operation of heat exchanger, heating or cooling sticky product in the chemical, oil, oil, oil, oil and other industries with the viscosity less than 106 CP or the mixture of polymer medium, and the heat exchanger, mixing and heat transfer reaction.
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