Purification device for by-product sodium sulfate decahydrate in sodium persulfate production process

Abstract

The invention relates to a purification device for a by-product sodium sulfate decahydrate in a sodium persulfate production process. The device comprises a solvent tank, an air blowing device, a spray dryer, a first-stage dust removing and discharging device, a calcining and drying device, and a secondary dust removing and discharging device; the solvent tank is connected with a spray nozzle of the spray dryer, the air blowing device is connected with a hot air inlet of the spray dryer, the outlet of the spray dryer is connected with the first stage dust removal and discharging device, the air outlet of the first-stage dust removal and discharging device is connected with a first induced draft fan, the discharge port of the first-stage dust removal and feeding device is connected with thecalcining and drying device, the discharge port of the calcining and drying device is connected with the second-stage dust removing and discharging device, and the air outlet of the second-stage dustremoval and feeding device is connected with the second induced draft fan. The device provided by the invention combines the spray dryer with the calcining and drying device to improve the efficiencyof purification and drying, so that the by-products in the sodium persulfate production are turned into treasure, and the pure anhydrous sodium sulfate is obtained.

Description

technical field [0001] The invention relates to a drying system, in particular to a purification device for by-product sodium sulfate decahydrate in the production process of sodium persulfate. Background technique [0002] Sodium sulfate (Na 2 SO 4 ) is a salt formed by the combination of sulfate and sodium ions, also known as Yuanmingfen, a white, odorless, bitter crystal or powder, hygroscopic. Appearance is colorless, transparent, large crystals or granular small crystals. Mainly used in the manufacture of water glass, glass, enamel, pulp, refrigerant mixture, detergent, desiccant, dye thinner, analytical chemical reagents, pharmaceuticals, feed, etc. At 241°C, sodium sulfate will transform into hexagonal crystals. Sodium sulfate is the most commonly used post-treatment desiccant in organic synthesis laboratories. [0003] Sodium sulfate decahydrate is a by-product of sodium persulfate production, which contains a small amount of sodium persulfate, which affects its...

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Problems solved by technology

[0003] Sodium sulfate decahydrate is a by-product of sodium persulfate production, which contains a small amount of sodium persulfate, which affects its performance. In addition, sodium sulfate decahydrate contains ten crystal waters, which greatly affects its storage.

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