Preparation apparatus of anhydrous sodium sulphate

Abstract

The invention relates to the field of a chemical industrial apparatus, and specifically relates to a preparation apparatus of anhydrous sodium sulphate. The apparatus includes a filtering mechanism, a crystallization mechanism, a drying mechanism and a conveying mechanism. A filtering pot includes a pot body, an installation table is arranged around an inner wall of the pot body, and sieves are cooperatively installed on the installation table. A continuous crystallization part comprises a crystallization kettle, the lower end of the crystallization kettle is provided with a crystallization discharge port, a disc centrifuge matching the crystallization discharge port is installed at the crystallization discharge port, and a crystal discharging pipe of the disc centrifuge communicates with a material inlet of a drying mechanism. Two ends of a coil pipe are connected to a refrigeration circulating pump, and a settlement pot is provided with a crystal discharge port which communicates with the disc centrifuge. The drying mechanism is a fluidized bed, and the conveying mechanism matching a charging end of the fluidized bed is installed at the charging end and is a closed auger conveyer. The purity of aqueous glauber salt is improved, and impurities in aqueous glauber salt are reduced. The aqueous glauber salt refining efficiency is high, the quality of aqueous glauber salt is good, and the aqueous glauber salt can be fully recycled. The anhydrous sodium sulphate is high in conveying speed and good in quality.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a preparation equipment of sodium sulfate. Background technique [0002] Yuanming powder has the advantages of low price, excellent refractive index, small particle size, good stability and non-toxic boarding. It is widely used in glass, printing and dyeing, storage, tanning, mining, and medical boarding industries. Yuanming powder has excellent optical properties and is suitable for filling transparent plastics. However, Yuanming powder is a strong polar substance and is easy to absorb moisture in the air. This water absorption greatly affects the mechanical properties of composite materials. Therefore, the strong hygroscopicity of Yuanming has become a bottleneck in the plastics industry. For example, Yuanming When powder is used as a non-polar filler in polymer composite materials, it is difficult to disperse uniformly in organic media because of its hydrophilic and oleophob...

AI Technical Summary

Problems solved by technology

However, Yuanming powder is a strong polar substance and is easy to absorb moisture in the air. This water absorption greatly affects the mechanical properties of composite materials. Therefore, the strong hygroscopicity of Yuanming has become a bottleneck in the plastics industry. For example, Yuanming When powder is used as an electrodeless filler in polymer composite materials, it is difficult to disperse uniformly in organic media because of its hydrophilic and oleophobic surface, resulting in material deterioration

[0003] Most of the existing methods of producing sodium sulfate adopt the thermal method, that is, the saturated nitric acid liquid obtained from Glauber’s salt is purified and sent to the evaporator for heating and evaporation. When the concentration rises to 40%-50%, it is passed through the hydrocyclone Carry out thickening, then through filtering, drying, can obtain finished product sodium sulfate, can find out from the production method of sodium sulfate, do not adopt any method to reduce the strong hygroscopicity of sodium sulfate, do not satisfy the market demand for low hygroscopicity. In addition, when the sodium sulfate is filtered, it only passes through sedimentation, and the effect of removing other small impurities is not very good. At the same time, the mother liquor after the crystallization method has a large amount of nitric water remaining, resulting in waste of resources and damage to the environment. causing great environmental pressure

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