Sodium bicarbonate preparation device and preparation method

Abstract

The invention relates to a sodium bicarbonate preparation device, which comprises a CO2 producing device, a Na2CO3 solution preparation device, a carbonization device, a crystallization barrel, a first centrifugal machine, a drying bed, a mother liquid tank, a mother liquid recovery device and a heat supply device. A sodium bicarbonate preparation method is applied to the sodium bicarbonate preparation device, and comprises the following steps that S01, CO2 gas and Na2CO3 solution are respectively prepared; S02, smoke gas heat respectively performs heat exchange with an alkaline dissolving tank and a drying bed; S03, smoke gas is recovered and utilized; S04, waste gas exhausted by a smoke gas comprehensive purification device is used for preparing CaCO3; S05, a CaCO3 finished product is prepared. The sodium bicarbonate preparation device and the sodium bicarbonate preparation method have the advantages that the wind pressure required by carbonization equipment is low; the reaction inside the carbonization equipment is full and comprehensive; raw materials are cyclically utilized; inside heat is multiply utilized; waste smoke gas is reutilized; no scaring phenomenon basically existsinside 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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