Impeller assembly and solid and liquid mixing apparatus using same

Abstract

The present invention provides an impeller assembly for a solid and liquid mixing apparatus. The impeller assembly comprises an impeller, the impeller comprises a truncated cone-shaped body, a plurality of mixing blades are formed on the inclined surface of the main body from top to bottom, the impeller assembly further includes a porous plate disposed on the outer side of the lower portion of themain body, and the porous plate is fixed to the housing of the mixing apparatus or the impeller of the impeller assembly. The impeller assembly also comprises a plurality of discharge blades disposedon the outer side of the porous plate in a generally radial direction, the discharge blades are fixedly connected to the impeller and rotate synchronously with the impeller. An object of the invention is to provide a mixing apparatus which integrates powder infiltration and high-efficiency dispersion, has good mixing and dispersion effect, a simple structure, low energy consumption and powerful processing ability, and is not easy to block, in particular, an apparatus which mixes ultra-fine powder with liquid to generate high-viscosity or high-concentration liquid.

Description

Technical field [0001] The invention relates to the field of solid and liquid mixing equipment, in particular to the equipment for mixing ultrafine powder and liquid to generate high viscosity or high concentration liquid. The invention also relates to an impeller assembly for 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-sized powder in a small amount of liquid, or mixing and dispersing into a mixed liquid with high viscosity, such as application A slurry used in the field of positive and negative electrodes for lithium-ion batteries. Generally speaking, the entire mixing process can be divided into three stages, breaking up, infiltrating and dispersing. In the dispersing stage, the powder changes from a large agglomerate to a roughly powder state after being stirred by a blade and other structures. In...

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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 ordinary blades are used to beat the powder onto the dispersion cylinder, there is no correcting of the powder. Targeted treatment of the gas wrapped around the powder body, the infiltration effect of the powder body is poor, and there are more residual gases 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 the best premixing effect, which affects the subsequent dispersing process

Second, due to the working principle, the dispersing cylinder must be installed from top to bottom. Its area and volume are very large, and it needs to rotate with the main shaft. The structure is complex and energy consumption is high.

Third, because the dispersing cylinder participates in the entire infiltration and dispersion process, when the powder enters the area where the mixing blade and the dispersing cylinder are set, many powder agglomerates are not fully dispersed. At the same time, the blades and the wall of the cylinder The distance is very close, causing large agglomerates to be directly hit on the dispersing cylinder before they can be broken up, causing the dispersing holes to be blocked, and the processing speed and capacity of the entire equipment to decrease, which cannot meet the requirements of rapid production.

Fourth, 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 raw material processing speed

Fifth, the direction in which the suspension flows is consistent with the direction in which the dispersion cylinder is set, and there is no impeller in the lower part, the speed at which the suspension enters the lower dispersion hole is low, and the small shear force affects the dispersion effect, and if the length of the dispersion cylinder is not long enough , there will be some suspensions that cannot enter the dispersion holes at all

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 A defect in the discharge speed of the patent, but it still cannot provide an effective solution to other problems, and there is no shear dispersion for the suspension again, and the mixing and dispersing effect of certain types of powder is not ideal

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