Atomization and evaporation crystallizer

Abstract

The invention relates to an atomization and evaporation crystallizer, which consists of a fan, a hot air duct, an induced draught fan, an air outlet, a cloth bag dust catcher, an atomizing nozzle, an evaporation chamber, a material pipe, a storage bin, a valve and a discharge port, wherein the fan is connected with the hot air duct; the top end of the material pipe is connected with the atomizing nozzle and is communicated with the hot air duct and the evaporation chamber; the cloth bag dust catcher is arranged at the junction of the upper part of the evaporation chamber and the induced draught fan; the induced draught fan is provided with the air outlet; the lower part of the evaporation chamber is provided with the bin; and the valve is arranged at the junction of the bin and the discharge port. The device integrates atomization, evaporation, crystallization and collection functions into a whole; waste heat produced by evaporative hot air in chemical production is rationally utilized; evaporation and crystallization are both finished in air; the obtained crystalline particles are fine and uniform, have no scaling phenomenon and are not required to be crushed; evaporative crystallization of inorganic salt and solution can be finished in one step to obtain and automatically collect solid crystalline particles; the production steps are saved; the operation cost is effectively reduced; and the evaporation and crystallization efficiencies are greatly increased.

Description

technical field [0001] The invention relates to an evaporation crystallization device in chemical production, in particular to an atomization evaporation crystallizer for evaporating inorganic salt solution to obtain solid crystal particles. Background technique [0002] In the prior art, evaporation crystallization is used in most of the production processes of inorganic salts. In traditional production operations, the principle of reducing the boiling point of water under negative pressure conditions is generally used, and a vacuum evaporator is used to heat the concentrated solution of inorganic salts, evaporate the water in it, and obtain a supersaturated solution, and then transfer it to the crystallizer to cool down. , cooling and crystallizing the solute in the supersaturated solution, and then performing solid-liquid separation by centrifugation to obtain inorganic salt crystals. The production process from solution to crystallization needs to go through three steps...

AI Technical Summary

Problems solved by technology

Due to the different composition of various inorganic salts, fouling often occurs on the contact surface of the evaporator heat exchanger, which reduces the heat exchange efficiency

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