Efficient crystallization and purification device and crystallization method for inorganic salt

Abstract

The invention relates to an efficient crystallization and purification device for an inorganic salt. The device comprises a bearing rack, a high-temperature crystallization kettle, a low-temperature crystallization kettle, a booster pump, a circulating pump, an air vortex tube, an air booster pump and a heat exchanger, wherein the high-temperature crystallization kettle and the low-temperature crystallization kettle are both embedded in the bearing rack, at least one heat exchanger is arranged in each of the high-temperature crystallization kettle and the low-temperature crystallization kettle, the heat exchanger in the high-temperature crystallization kettle is communicated with the high-temperature air outlet of the air vortex tube through a flow guide tube, and the heat exchanger in thelow-temperature crystallization kettle is communicated with the low-temperature air outlet of the air vortex tube through a flow guide tube. The crystallization method comprises five steps of equipment assembly, equipment prefabrication, preliminary crystallization operation, re-crystallization operation and crystal collection. According to the invention, the integration degree and the modularization degree are extremely high, the crystallization mode is flexible, and the heat exchange efficiency in the crystallization operation process is high; and in the crystallization operation process, the heat exchange efficiency and the heat energy cyclic utilization efficiency are effectively improved, and the operation energy consumption of crystallization operation is effectively reduced.

Description

technical field [0001] The invention relates to an inorganic salt high-efficiency crystallization purification device and a crystallization method, belonging to the technical field of chemical equipment. Background technique [0002] At present, in many chemical production activities, it is necessary to crystallize all kinds of inorganic salts dissolved in the solution to obtain inorganic salt crystals, solid-type products or raw materials. In actual crystallization production activities, the crystallization equipment currently used Crystallization operations are often carried out by high-temperature evaporation or low-temperature precipitation. For example, the patent application number is "2014101385389" "Inorganic salt crystallization large particle size salt process and its equipment" and the patent application number is "2018109925082" " A microwave dehydration method for inorganic salts containing crystal water" and other crystallization equipment and processes, althou...

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Problems solved by technology

[0002] At present, in many chemical production activities, it is necessary to crystallize all kinds of inorganic salts dissolved in the solution to obtain inorganic salt crystals, solid-type products or raw materials. In actual crystallization production activities, the crystallization equipment currently used Crystallization operations are often carried out by high-temperature evaporation or low-temperature precipitation. For example, the patent application number is "2014101385389" "Inorganic salt crystallization large particle size salt process and its equipment" and the patent application number is "2018109925082" " A microwave dehydration method for inorganic salts containing crystal water" and other crystallization equipment and processes, although they can meet the needs of the current inorganic salt crystallization operations to a certain extent, but the crystallization efficiency is low, and the concentration of inorganic salts in the solution after crystallization is relatively high. While causing serious waste of materials, it also causes serious pollution to the surrounding environment, and the currently used crystallization equipment also has defects such as single crystallization means, complicated equipment mechanism, and high energy consumption during operation, especially when it involves high temperature When evaporating, the current traditional crystallization equipment has low heating efficiency and serious waste of heat energy, which further affects the efficiency and cost of crystallization operations

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