Micro and nano-grade light calcium carbonate tube-condensation-type double-circulation multi-level carbonation system

Abstract

The invention discloses a micro and nano-grade light calcium carbonate tube-condensation-type double-circulation multi-level carbonation system. The system comprises at least three carbonization towers (1) connected in series. A slurry tank is provided between each two adjacent carbonization towers (1). A carbonization tower (1) comprises a high-pressure pump (3), a spraying mist-making device (4), a tower body (5), condensing tubes (6), an air compressor (7), a gas plate (8), a refrigerator (9), and an accumulated liquid and scale removing device (10). The condensing tubes (6) are connected with the refrigerator (9). The spraying mist-making device (4) is connected with the high-pressure pump (3). The gas plate (8) is connected with the air compressor (7). The accumulated liquid and scale removing device (10) is sleeved on the outside of the condensing tubes (6). The system provided by the invention has the advantages that: spraying and a high-liquid-level bubbling carbonization method are adopted, continuity is high, and carbonization efficiency is high. The condensing tubes are added, such that the reaction temperature in the tower can be conveniently controlled. The accumulated liquid and scale removing device is provided, such that condensing tube scale can be conveniently removed.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate production equipment, in particular to a micro and nanoscale light calcium carbonate column-tube condensation double-cycle multi-stage carbonization system. Background technique [0002] The carbonization process is the most basic and critical process in the production process of ultrafine calcium carbonate. At present, the carbonization process mainly adopts intermittent bubbling carbonization method, intermittent stirred tank carbonization method, continuous spray carbonization method and high gravity reaction crystallization valve. Intermittent bubbling carbonization method and intermittent stirred tank carbonization method are the most widely used methods in China at present. On the basis of the production of light calcium carbonate, the carbonization temperature is controlled by refrigeration, and the crystal form of the product is controlled by adding appropriate additives. particl...

AI Technical Summary

Problems solved by technology

The continuous spray carbonization method uses calcium hydroxide emulsion atomized as the dispersed phase for carbonization reaction, which greatly increases the gas-liquid contact area, and a large number of crystal nuclei are easy to form in the early stage of the reaction. This method has strong continuity, but the technology is more complicated and the operation is difficult. Large, the nozzle is easy to block, so the application part is common

Hypergravity reaction is still a batch production method, with complex technology, high energy consumption, small output, and large equipment investment

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