Carbonization reaction device and method for nano calcium carbonate production

Abstract

The invention discloses a carbonization reaction device and a carbonization reaction method for nano calcium carbonate production. The carbonization reaction device comprises a Ca(OH)2 slurry feeding tube, a carbonization tower, a stirrer, an annular gas-liquid distributor, a CO2 gas inlet tube and an emulsion dispersing machine. The carbonization reaction method comprises the following steps: (1) feeding Ca(OH)2 slurry into a reflux area of the carbonization tower; (2) continuously feeding the Ca(IH)2 slurry into the emulsion dispersing machine to mix and react with a CO2 gas, and feeding the obtained product into the reaction area of the carbonization tower; (3) continuously circulating the mixed slurry between the carbonization tower and the emulsion dispersing machine for carbonization and emulsion dispersion; (4) adding a dispersing agent, continuously circulating the mixed slurry between the carbonization tower and the emulsion dispersing machine for secondary carbonization and emulsion dispersion; and (5) stopping introduction of CO2 for reaction and operation of the emulsion dispersing machine, thereby obtaining prepared nano calcium carbonate slurry. The carbonization reaction device and the carbonization reaction method for nano calcium carbonate production are rapid in carbonization reaction speed, high efficiency, good effect, small investment and low cost.

Description

technical field [0001] The invention relates to the technical field of nanometer calcium carbonate production, in particular to a carbonization reaction device and method for nanometer calcium carbonate production. Background technique [0002] Nano-calcium carbonate is a new type of ultra-fine solid powder material developed in the 1980s, with a particle size between 0.01 and 0.1 μm. Due to the superfineness of nano-calcium carbonate particles, its crystal structure and surface electronic structure change, resulting in quantum size effects, small size effects, surface effects and macroscopic quantum effects that ordinary calcium carbonate does not have. It can be widely used in plastics, Rubber, paint, ink, sealing adhesive materials, coatings and other fields. [0003] According to the carbonization reaction and different production processes and carbonization equipment, the production process of nano-calcium carbonate can be divided into bubbling carbonization method, st...

AI Technical Summary

Problems solved by technology

The disadvantage is that the equipment investment is large, the nozzle is easy to block, the technology is more complicated, the operation is difficult, it is not suitable for production, and the promotion of industrial applications is limited.

However, the carbonization of the membrane dispersion microstructure reactor has the problems of high cost, easy blockage of equipment, and difficulty in industrial production.

[0014] The traditional nano-calcium carbonate carbonization method has disadvantages such as long reaction time, low solid content of the reaction, small production capacity, difficult control of the production process, and poor dispersion of the generated product particles.

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