Baking soda preparation device and preparation method

Abstract

Baking soda preparation apparatus, including CO 2 Output device, Na 2 CO 3 Solution preparation device, carbonization device, crystallization barrel, first centrifuge, drying bed, mother liquor tank, mother liquor recovery device and heating device; a baking soda preparation method, applied to a baking soda preparation device, the steps are as follows: S01, respectively prepare CO 2 gas and Na 2 CO 3 solution; S02, flue gas heat exchange with the alkali-dissolving tank and drying bed; S03, flue gas recycling; S04, use the waste gas discharged from the comprehensive flue gas purification device to prepare CaCO 3 ; S05, preparation of CaCO 3 Finished product; the advantages of the present invention are: low wind pressure required for carbonization equipment; more complete internal reaction of carbonization equipment; recycling of raw materials; multiple utilization of internal heat; reuse of waste flue gas; basically no scarring inside the carbonization equipment.

Description

technical field [0001] The invention relates to the field of chemical machinery, in particular to a baking soda preparation device and a preparation method. Background technique [0002] Baking soda is one of the important inorganic chemical products. It is widely used in many fields such as chemical industry, light industry, medicine, textile and fine chemical industry. my country is an important producer of baking soda products, and has formed a scale of more than one million tons so far, ranking second in the world after the United States. It has been growing at an average annual rate of 2%-3% for many years. [0003] The carbonization method is a common method for the preparation of baking soda, and its reaction principle is to convert CO 2 gas into Na 2 CO 3 In the solution (ie mother liquor), make the two react chemically to generate NaHCO 3 The crystal nucleation solution (ie baking soda solution), and then for containing NaHCO 3 The crystal nucleation liquid car...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a baking soda preparation device and preparation method, which solves the problem of the large energy consumption of the carbonization equipment and the insufficient internal reaction of the carbonization equipment in the existing carbonization baking soda preparation process And unbalanced, the mother liquor has not been recycled, resulting in the waste of raw materials, and the low heat utilization rate in the process of drying the baking soda solid particles

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