Mechanical activation reactor capable of enhancing polysaccharide high polymer modification

Abstract

The invention discloses a mechanical activation reactor capable of enhancing polysaccharide high polymer modification. An outer barrel is in a horizontal structure and a grinding inner barrel is arranged in the outer barrel; a speed reducer I is connected with a stirring shaft by a shaft coupler; the stirring shaft penetrates through a through hole in an end cover of the outer barrel and is inserted into the grinding inner barrel; the stirring shaft is fixed at the two ends of the outer barrel by bearing seats at the two ends; a jacket is arranged outside the grinding inner barrel; a material inlet / outlet is formed in the outer barrel and is communicated with the grinding inner barrel; the grinding inner barrel is internally provided with grinding balls; the stirring shaft is provided with paddles and a material scraping screw belt; the paddles are mounted on the stirring shaft in a staggered manner; and the material scraping screw belt is mounted on the stirring shaft. The mechanical activation reactor is provided with the paddles and the material scraping screw belt so that the grinding balls in the grinding inner barrel can be driven by the paddles and the material scraping screw belt to move back and forth, and the disturbance of the grinding balls is enhanced, and furthermore, materials can react more uniformly and the surface updating is more rapid; and the reaction time is effectively shortened, the loss of the raw materials is reduced and the quality of a product is improved.

Description

technical field [0001] The invention relates to a stirring ball mill, in particular to a mechanical activation reactor for strengthening the modification of polysaccharide polymers. Background technique [0002] Polysaccharide polymers include starch, lignocellulose, chitosan, etc. Polysaccharide polymers are generally crystalline polymers, consisting of crystalline regions and amorphous regions. Hydrogen bonds are formed to form a highly crystalline structure. Most of the reagents can only reach the amorphous region, but not the crystalline region. Therefore, in order to improve the modification and deep processing efficiency of polysaccharide crystalline polymers, they must be activated. [0003] Mechanical Activation (Mechanical Activation) is a new cross-edge technology, which refers to the change of crystal structure and physical and chemical properties of solid substances under the action of mechanical forces such as friction, collision, impact, and shearing, so that p...

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Problems solved by technology

[0006] First, because it involves simultaneous constant temperature heating control of internal materials, it is often designed as a separate inner shaft stirring or a separate outer cylinder rotation. Therefore, traditional mechanical activation devices have defects such as large power consumption, large equipment, slow response speed, and low production capacity.

[0007] The second is that when the stirring ball mill is running, due to the impact between a large number of grinding balls, the collision between the balls and the balls and the materials during the ball milling process can generate heat, which may cause the local temperature to rise, resulting in material The heating is uneven, and the phenomenon of material sticking to the wall is easy to occur during the heating process, the loss of raw materials is also large, and product quality control is difficult

[0008] Third, in the solid-phase reaction of polysaccharide polymers, since the solid-phase reaction is different from the liquid-phase reaction, the reaction process is solid-solid contact, the mixing and contact between materials are not sufficient, and the energy exchange between materials is limited. , and the crystal lattice of each solid-phase reactant is highly ordered, and the movement of lattice molecules is difficult, so the reaction temperature must be increased

However, organic matter is often unable to withstand high temperatures, and is easy to decompose and carbonize under high temperature conditions. Therefore, solid-phase synthesis has been mostly limited to high-temperature sintering of inorganic materials for a long time. High-temperature heating of polysaccharide polymers must solve high-temperature gelatinization and sticky walls. phenomenon, it is necessary to keep the surface between the material and the heating body in a state of renewal

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