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

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...

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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

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