a method of crystallization

A technology of crystallization and cooling crystallization, applied in the direction of solution crystallization, can solve the problems of hindered crystallization process, affect heat exchange, vicious circle, etc., achieve the effect of favorable solid-liquid separation, improve energy efficiency coefficient, and wide range of process adaptability

Active Publication Date: 2016-02-17
JIANGSU JIUJIUJIU TECH
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Problems solved by technology

However, in actual production, due to their inherent characteristics, some products will stick to the wall during cooling or evaporative concentration, which will affect heat transfer and cause a vicious circle, hindering the crystallization process

Method used

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  • a method of crystallization

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Embodiment Construction

[0018] A crystallization method, a part of the mother liquor in the centrifuge mother liquor collection container (tank or pool, etc.) 1 is pumped to the front section for use, and the other part is transferred to the low-temperature mother liquor preparation tank 2 through the mother liquor pump, and the low-temperature mother liquor preparation tank The mother liquor is connected with the low-temperature water preparation unit 3 through the low-temperature mother liquor circulation pump, and the mother liquor is used as the refrigerant, and the mother liquor is cooled by the low-temperature water preparation unit to maintain the temperature of the mother liquor in the low-temperature mother liquor preparation tank within the set range; The mother liquor is pumped to each mixing and cooling crystallization kettle 4 through the low-temperature mother liquor pump 5, and mixed with hot materials in the mixing and cooling crystallization kettle. After the temperature in the mixing ...

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Abstract

The invention discloses a crystallization method. The crystallization method comprises the following steps: feeding one part of mother solution from a centrifugal mother solution collection container to a front section through a mother solution pump, transferring the other part of the mother solution to a low-temperature mother solution preparation tank through the mother solution pump; associating the mother solution in the low-temperature mother solution preparation tank with a low-temperature water preparation unit through a low-temperature mother solution circulating pump, cooling the mother solution through the low-temperature water preparation unit, and maintaining the temperature of the mother solution in the low-temperature mother solution preparation tank in a set range; pumping the low-temperature mother solution from the low-temperature mother solution preparation tank into each mixing and cooling crystallization kettle through the low-temperature mother solution pump, mixing the mother solution with hot materials in the mixing and cooling crystallization kettle, carrying out solid-liquid separation in a centrifugal machine after the temperature and crystallized product in the mixing and cooling crystallization kettle are stabilized, feeding the mother solution into the mother solution collection container for recycling. According to the method, the crystallization efficiency can be effectively improved, and energy conservation and consumption reduction are realized.

Description

technical field [0001] The present invention relates to a crystallization method. Background technique [0002] As an important means of solid-liquid separation and product refining, crystallization is currently widely used in the chemical industry. Industrial crystallization is mainly divided into two types: cooling type and evaporation type. The type of crystallization equipment to choose is mainly determined by the solubility curve of the target product. If the solubility of the target product increases significantly with the increase of temperature, cooling crystallization or evaporation can be used. Crystallization equipment. However, in actual production, due to their inherent characteristics, some products will stick to the wall during cooling or evaporative concentration, which will affect heat transfer and cause a vicious circle, hindering the crystallization process. Contents of the invention [0003] The object of the present invention is to provide a crystall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02
Inventor 李文建周新基朱建军李珣珣吴小强
Owner JIANGSU JIUJIUJIU TECH
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