Axial-flow type stirring device suitable for pseudoplastic fluid with yield stress

A technology of pseudoplastic fluid and stirring device, which is applied in the field of pseudoplastic fluid stirring and axial flow stirring device, which can solve the problems of reduced average shear rate of stirring tank, affecting stirring efficiency, and severe circular motion, etc. It is easy to form a dead zone, reduce the volume of the dead zone, and enhance the mixing effect

Active Publication Date: 2013-07-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, for the stirring of non-Newtonian fluid with yield stress, it is often easy to produce a dead zone where the fluid is stagnant or slow-flowing and the shear rate is small at the rear of the rectangular baffle. If the baffle is removed, although there is no dead zone, but The circular motion in the stirring tank is violent, which seriously affects the mixing, and the average shear rate in the stirring tank will decrease, which affects the stirring efficiency

Method used

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  • Axial-flow type stirring device suitable for pseudoplastic fluid with yield stress
  • Axial-flow type stirring device suitable for pseudoplastic fluid with yield stress

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Embodiment Construction

[0025] For better illustrating the present invention, facilitate understanding technical scheme of the present invention, typical but non-limiting embodiment of the present invention is as follows:

[0026] An axial flow stirring device suitable for pseudoplastic fluid with yield stress, the stirring device includes a stirring tank main body 5; the inside of the stirring tank main body 5 is provided with a triangular baffle 1 along its side wall; the triangular baffle Plate 1 has its top corner up and its bottom edge down.

[0027] The stirring tank main body 5 is cylindrical, and the triangular baffles 1 are evenly distributed along its circumference. Three to four triangular baffles 1 are evenly distributed along the circumference of the stirring tank main body 5 .

[0028] The triangular baffle 1 is a right-angled triangle, and its long right-angled side is close to and parallel to the side wall of the stirring tank main body 5 . The length of the short right-angled side ...

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Abstract

The invention relates to an axial-flow type stirring device suitable for a pseudoplastic fluid with a yield stress. The stirring device comprises a stirring tank main body (5), the inside of which is provided with triangular baffle plates (1) along its side walls. The apex angles of the triangular baffle plates (1) are positioned above, and the bottom edges of them are at beneath positions. In the invention, standard rectangular baffle plates are replaced by triangular baffle plates, the dead zone part appearing behind the baffle plates during stirring the pseudoplastic fluid with a yield stress can be effectively reduced, the small shear rate area is small, and at the same time, the input power is reduced.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to an axial flow stirring device suitable for pseudoplastic fluid with yield stress in the production process of chemical products. The invention relates to the agitation condition of pseudoplastic fluid with yield stress, such as ore pulp, paper pulp and the like. Background technique [0002] As a chemical reactor often involved in process engineering, the stirred tank is widely used in many fields such as mineral smelting, wastewater treatment, papermaking, and food engineering, where it plays the role of mixing, accelerating mass transfer, and heat exchange. [0003] The working medium in industrial stirring tanks is often non-Newtonian fluid, and there are often working conditions for non-Newtonian fluid with yield stress to be stirred. Aiming at the stirring process of non-Newtonian fluid or high-viscosity fluid such as slurry stirring, the existing technology has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F7/18B01F15/00
Inventor 肖颀杨宁李静海
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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