Fractal blade stirrer

A stirrer and blade technology, applied in the field of fractal blade stirrer, can solve problems such as uneven distribution of turbulent kinetic energy, non-uniform dispersion of multi-phase fluid, non-uniform mixing of fluid, etc., to improve the flow state in the kettle and strengthen the interaction , The effect of reducing power consumption

Active Publication Date: 2021-09-03
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: The purpose of the invention is to provide a fractal blade agitator to solve the problem of non-uniform mixing of fluids or non-uniform dispersion of multi-phase fluids caused by uneven distribution of shear force and turbulent kinetic energy in the tank caused by most traditional stirring paddles. question

Method used

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  • Fractal blade stirrer
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The diameter of the stirred tank is 0.4m, the height is 1m, four baffles with a width of 0.04m are evenly distributed on the wall, and the stirring volume is about 0.06m 3 , the liquid level is 0.48m high, and the blade agitator is installed on the central shaft with a diameter of 20mm through the fixed sleeve 2. Such as figure 1 As shown, the agitator has three H-shaped small blades 5 in total, each blade has a width of 75 mm, a height of 150 mm, and a thickness of 5 mm, and the height of the blades from the bottom of the kettle is 80 mm. Fixed sleeve 2 center ring array, the speed of the stirrer is 120rpm, 180rpm, 240rpm, the power of the stirrer is 115.4W, 389.5W, 923.2W, according to the evaluation results of laser-induced fluorescence, the mixing corresponding to 95% uniform mixing The times are 20.3 seconds, 14.7 seconds, 10.8 seconds.

Embodiment 2

[0036] The diameter of the stirred tank is 0.6m, the height is 1.0m, four baffles with a width of 0.06m are evenly distributed on the wall, and the stirring volume is about 0.23m 3 , the liquid level is 0.8m high, and the fractal blade agitator is installed on the central shaft with a diameter of 40mm through the fixed sleeve 2. Such as figure 2 Shown, utilize the fractal blade stirrer that fractal obtains in above-mentioned example altogether 6 H-shaped small blades 5, each blade is long 80mm, wide 8mm, high 160mm, and blade is 100mm apart from the height of the bottom of the kettle, in the tank reactor The inner n-shaped blades are evenly arranged axisymmetrically along the ring direction of the fixed sleeve, and each H-shaped small blade is symmetrically distributed along the vertical connection axis. The speed of the agitator is 170rpm, 255rpm, 341rpm, and the power of the agitator is 461.8W, 1558.3W, 3695.9W, according to the evaluation results of laser-induced fluoresc...

Embodiment 3

[0038] The diameter of the stirred tank is 1m, the height is 1.6m, four baffles with a width of 0.06m are evenly distributed on the wall, and the stirring volume is about 0.94m 3 , the liquid level is 1.2m high, and the fractal blade agitator is installed on the central shaft with a diameter of 200mm through a fixed sleeve. Such as image 3 As shown, using the secondary fractal in the above example, and n=2, the obtained fractal blade agitator has a total of 16 fractal blades, each H-shaped small blade is 50mm long, 8mm wide, and 100mm high, and the height of the blade from the bottom of the kettle is 200mm, in the tank reactor, the n-component shaped blades are evenly arranged axisymmetrically along the annular direction of the fixed sleeve, and each H-shaped small blade is symmetrically distributed along the vertical connection axis. The speed of the agitator is 258.6rpm, 390rpm, 517rpm, The power of the stirrer is 1847.2W, 6353.2W, and 14783.6W. According to the evaluation...

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Abstract

The invention discloses a fractal blade stirrer, which comprises a fixing sleeve, wherein a plurality of groups of fractalblades are connected to the fixing sleeve and distributed in an annular array with the fixing sleeve as the center, each group of fractal blades comprises at least one small blade, when each group of forming blades comprises a plurality of small blades, the small blades are arranged in a rectangular array, the arrayed small blade groups are symmetrically distributed along a connecting shaft between the fractal blade and the fixing sleeve to form the fractal blade, and the areas of all the small blades are equal. According to the invention, the fractal blade stirrer greatly strengthens uniform mixing of fluids or uniform dispersion among multi-phase fluids, interaction of fractal blades and the fluid leads to consistency in macroscopic scale and shear force and turbulent energy which are uniformly distributed in microscopic scale, the flowing state in a kettle is improved, the fluid mixing efficiency is improved, and the power consumption of the stirrer is reduced; and the fractal blade stirrer is simple in structure and easy to process, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to a stirrer, in particular to a fractal blade stirrer. Background technique [0002] With the continuous development of industrial processes and the establishment of the goal of "carbon neutrality", industries such as chemical industry, pharmaceuticals, food and wastewater treatment are facing the serious challenge of "high energy consumption and high pollution" at the same time, so it is necessary to develop new chemical equipment or devices To improve production efficiency and reduce production energy consumption. The agitator is one of the important parts of the tank reactor. Its main function is to realize the uniform mixing of the fluid in the tank or the uniform dispersion between the multiphase fluids, so it becomes an important factor affecting the energy consumption of the tank reactor. Therefore, for the new The development of agitators has always been one of the research hotspots in the field of chemical process inten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00
CPCB01J19/0066
Inventor 骆培成张浩武永军游攀
Owner SOUTHEAST UNIV
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