An impeller assembly and solid and liquid mixing equipment using the same

Abstract

The present invention uses an improved impeller assembly in solid and liquid mixing equipment, including an impeller. The impeller includes a truncated cone body. The inclined surface of the body is formed with a number of mixing blades from top to bottom. The impeller assembly also includes at least One layer of baffles. The baffles are respectively fixed on the casing of the mixing device and the impeller of the impeller assembly, and holes may be arranged on the baffles. The gaps between the baffles, the holes on the baffles, and the gaps between the baffles and the housing together form a flow channel for the suspension. The purpose of the present invention is to provide a kind of mixing equipment that realizes powder infiltration and high-efficiency dispersion, has good mixing and dispersion effect, simple structure, low energy consumption, strong processing capacity, and is not easy to be blocked, especially the mixing of ultrafine powder and liquid Equipment for producing highly viscous or highly concentrated suspensions.

Description

technical field [0001] The invention relates to the field of solid and liquid mixing equipment, especially the equipment for mixing superfine powder and liquid to generate high-viscosity or high-concentration suspension. The invention also relates to an impeller assembly for the solid and fluid mixing equipment. Background technique [0002] In the industrial field, many liquid raw materials are made by mixing powder and liquid, especially the mixing and dispersing of ultra-fine powder such as nano-scale powder in a small amount of liquid, or mixing and dispersing into a high-viscosity mixed liquid, such as application Slurry in the field of positive and negative electrodes of lithium ion batteries. Generally speaking, the entire mixing process can be divided into three stages, breaking up, infiltration and dispersion. In the stage of breaking up, the powder changes from a large agglomerate to a rough powder state through the stirring of blades and other structures. In the...

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Problems solved by technology

However, through the cumulative verification of actual production, although the mixing effect of the above-mentioned mixing equipment is improved compared with the old equipment, there are still several defects: first, because the powder is beaten onto the dispersion cylinder by ordinary blades, there is no adjustment for the powder The surrounding gas is treated in a targeted manner, resulting in poor wetting effect of the powder and more residual gas on the surface

In the state where the air on the surface of the powder is not exhausted to the maximum extent, the dispersing cylinder intervenes in the pre-mixing work prematurely, resulting in insufficiently infiltrated powder agglomerates being thrown onto the dispersing cylinder 41 by the mixing blade 44, which is easy to block The dispersing hole 42 cannot achieve a good mixing effect, which affects the subsequent dispersing process

Second, as soon as the powder enters the area where the mixing blade and the dispersion cylinder are installed, many powder agglomerates have not been fully dispersed, but the distance between the blade and the wall of the cylinder is very close, resulting in some powder agglomerates not yet dispersed. When it is broken up in time, it is directly hit on the dispersing cylinder, resulting in blockage of the dispersing hole, resulting in a decrease in the processing speed and capacity of the entire equipment or even downtime

Third, since the mixing blade, dispersing cylinder and dispersing disc use the same main shaft and motor, and the truncated conical impeller is not used, the linear speed of the bottom edge of the impeller is not fast, the mixing and throwing effects are affected, and it cannot be formed at the discharge port. Effective vacuum, slow downflow of the suspension, unsatisfactory processing speed

The mixing device is actually similar to the technical solution of the previous patent, which is equivalent to adding an independent discharge mechanism on the basis of the previous patent. However, the discharge mechanism only plays the role of discharge, although this overcomes the previous One patent has a defect in the discharge speed, but it still cannot provide an effective solution to other problems, especially the suspension is not further sheared and dispersed, and the mixing and dispersing effect of the ultrafine powder is not ideal.

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