Vertical modified stir ball-milling reactor for reinforcing polysaccharide polymers

Abstract

The invention relates to a vertical modified stir ball-milling reactor for reinforcing polysaccharide polymers, and a stirring shaft is driven by a drive unit through a coupling. The reactor further comprises a cylinder cover plate, a grinding inner cylinder, a lining plate, a funnel type material feeding port, a material discharging port and grinding balls. A stirring blade set composed of inclined plate blades and an S-shaped spiral blade is mounted on the stirring shaft, the inclined plate blades are mounted on the stirring shaft in parallel, and the S-shaped spiral blade is vertically mounted on the stirring shaft; and a plurality of through holes for grinding balls in the grinding inner cylinder to pass through are arranged on the inclined plate blades. According to the reactor, the stirring blade set is added, so that materials can be mixed evenly, and accordingly, the production efficiency is improved. Simultaneously, the stirring shaft and the S-shaped spiral blade are manufactured into hollow structures, and fed cooling substances are helpful for keeping the temperature to be uniform and the constant-temperature reaction field; and the bottom of grinding inner cylinder is hemispherical, so that grinding dead angles are avoided.

Description

technical field [0001] The invention relates to a vertical agitating ball mill, in particular to an agitating ball milling reactor suitable for strengthening the modification of polysaccharide polymers. Background technique [0002] Polysaccharide polymers mainly refer to starch, plant fiber, chitosan, etc. From a structural point of view, cellulose in plant fibers (polysaccharide polymers such as starch and chitosan have a similar structure) can be divided into outer layer without The shaped zone and the crystallized zone of the inner layer. It is generally believed that most reagents can only reach the amorphous region, but not the crystalline region. Therefore, in order to effectively solve the problems existing in the heterogeneous chemical reaction of polysaccharide polymers, a certain degree of mechanical activation is required, that is, after applying mechanical energy to the solid material, the solid state and lattice structure of the solid material will be changed ...

AI Technical Summary

Problems solved by technology

[0006] First, although the flat paddles can stir the grinding balls in the grinding inner cylinder after rotating with the stirring shaft to improve the disturbance and activity of the grinding balls, but at the same time, it will block the movement of the grinding balls in the grinding inner cylinder to a certain extent. The movement, especially the longitudinal movement, reduces the contact probability of the material and the grinding body, greatly reducing the grinding efficiency

At the same time, the amount of grinding balls is relatively large, especially during solid phase reactions, which can easily lead to uneven mixing between reactants

[0007] Second, when the ball mill is running, due to the impact between a large number of grinding balls, it is usually easy to generate a large amount of heat in a short time, so that the temperature of the stirring ball mill rises quickly

However, for polysaccharide polymers, there may be heat sensitivity, and the water-cooled jacket method still cannot solve the problem of uneven temperature of such reactants

[0008] Third, in the process of material grinding reaction, the vertical grinding cylinder is prone to dead angles, and the reactants to be ground tend to stagnate in the dead angles, reducing the grinding efficiency

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