Spreading and cooling pot for phosphoric acid manufacture

Abstract

The invention relates to a splashing cooling tank for producing phosphoric acid, belongs to a special device for producing the phosphoric acid, and in particular relates to cooling and purification of phosphoric acid hot slurry. The splashing cooling tank for producing the phosphoric acid consists of a tank body (1), a cooling fan (2), a hot acid inlet (3), an acid slurry spray head (4), a uniform splashing baffle plate (5), an observation hole (6), an air inlet (7), a cold acid outlet (8), an air inlet baffle plate (9), a slurry deposition discharge pipe (10) and a vent hole (11). The temperature of the phosphoric acid hot slurry can be reduced to be between 7 and 8 DEG C, slurry gypsum crystals are coarse, and the quantity of magnesium, aluminum and sodium impurity crystals is increased as well, so that the splashing cooling tank for producing the phosphoric acid effectively improves the purity of an acid liquor, improves the reliability of equipment operation, and prolongs the operating period of equipment.

Description

Technical field: [0001] The throwing cooling tank for phosphoric acid production is a special equipment for phosphoric acid production, especially involving the cooling and purification of phosphoric acid hot slurry. Background technique: [0002] At present, in China, during the production and extraction reaction of dihydrate wet-process phosphoric acid, a large amount of heat is generated, and some magnesium and aluminum impurities cannot be precipitated and precipitated, which brings great difficulties to filtration; at the same time, the filter cloth is often affected by temperature. If it is too high, it will cause hardening and aging; the crystallization of gypsum is poor, and the filtration capacity cannot be increased. The higher the temperature of the concentrated phosphoric acid produced by the concentration system, the more difficult it is to precipitate and precipitate impurities such as magnesium, aluminum, and sodium. Quality has a great influence on the qualit...

AI Technical Summary

Problems solved by technology

[0002] At present, in China, during the production and extraction reaction of dihydrate wet-process phosphoric acid, a large amount of heat is generated, and some magnesium and aluminum impurities cannot be precipitated and precipitated, which brings great difficulties to filtration; at the same time, the filter cloth is often affected by temperature. If it is too high, it will cause hardening and aging; the crystallization of gypsum is poor, and the filtration capacity cannot be increased. The higher the temperature of the concentrated phosphoric acid produced by the concentration system, the more difficult it is to precipitate and precipitate impurities such as magnesium, aluminum, and sodium. Quality has a big impact, troubled phosphoric acid production quality

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