Evaporating crystallizer

Abstract

The invention relates to an evaporating crystallizer which comprises an evaporating chamber, a center drainage cylinder, an evaporating chamber inner cone, a clear liquid transfer pipe, a crystal cultivation settling chamber baffling cylinder, an upper circulation pipe, an outer circulation feed nozzle, a heating chamber, a lower circulation pipe, a forced circulation pump, a salt foot, a secondary steam pipe and a steam discharge pipe. Outer circulation of the evaporating crystallizer are formed by the evaporating chamber, the upper circulation pipe, the heating chamber, the forced circulation pump and the lower circulation pipe; and inner circulation of the evaporating crystallizer is formed by the center drainage cylinder, the evaporating chamber inner cone and the crystal cultivation settling chamber baffling cylinder. With the adoption of the evaporating crystallizer, salt crystals with large particle sizes and high purity can be produced, energy consumption per unit product is further reduced, the normal production cycle is prolonged, and the comprehensive economic benefit is increased.

Description

technical field [0001] The invention relates to an evaporative crystallizer, in particular to an evaporative crystallization tank with a middle inlet and outlet material for salt production. technical background [0002] The purity of the salt product in the vacuum evaporation salt production is closely related to the particle size, the larger the grain size of the salt, the higher the purity of the product. At the same time, the uniformity of salt grains is also an important indicator to measure the quality of salt. The grain size of the salt crystals is large and uniform, which not only has a good appearance, but also can make the salt not easy to agglomerate and reduce the amount of loosening agent added in the salt. [0003] The production of salt by vacuum evaporation involves the consumption of heat energy and electric energy. Generally, the larger the particle size of the product, the higher the energy consumption per unit of product. [0004] According to the intr...

AI Technical Summary

Problems solved by technology

like figure 2 , the forced circulation axial discharge evaporator is a comprehensive improvement of the externally heated forced forward circulation axial feed evaporation crystallization tank and the externally heated forced reverse circulation axial discharge evaporation crystallization tank. Jacketed settling chamber, but there is no steam discharge pipe above the clear liquid discharge pipe, which may easily lead to poor liquid discharge from the clear liquid discharge pipe; the patented evaporator still has the disadvantage of solid-liquid segregation; the solution near the liquid surface of the evaporation chamber is oversaturated The degree of supersaturation is the highest, and it will enter the next cycle without being fully absorbed, so a part of the generated supersaturation will be wasted

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