Spray drying apparatus for drying catalyst

Abstract

The present invention relates to a spray drying apparatus for drying a catalyst. The apparatus comprises: a centrifugal drying column comprising a vertical upper cylinder and a lower circular cone; the middle of a column top is provided with a volute hot air distributor and a variable frequency centrifugal atomizer; a storage tank is connected to a feed inlet of the variable frequency centrifugal atomizer via a material delivery pump; a heating apparatus is connected to an air inlet of the volute hot air distributor via a hot air pipeline; a cooling feeder is mounted at the bottom of the drying column and is connected to a discharge port of the drying column; an upper side wall of the drying column is provided with a cloth bag filter chamber; a removable cloth bag filter is disposed in the cloth bag filter chamber; a plurality of pneumatic hammers are mounted on an outer side wall of the drying column; and the pneumatic hammers are connected to an electric air pump via a gas pipeline. An intelligent control box is connected to the variable frequency centrifugal atomizer, the material delivery pump, the heating apparatus, the cooling feeder and the electric air pump via wires; operating parameters of the entire drying apparatus are controlled accurately; and the phenomenon of adhesion in the drying column can be effectively avoided, thereby enhancing the quality of a catalyst.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a spray drying device for catalyst drying and granulation. Background technique [0002] Catalysts play an irreplaceable role in the modern chemical industry, and about 80% of chemical reactions are related to the presence of catalysts. Most of the existing catalysts are nano-scale or micron-scale particle powders. There is interfacial tension between the particles and the solution, which is prone to particle aggregation. Therefore, drying is an extremely critical process in the process of preparing catalyst powders by solution reaction. Spray drying is the most common drying technology for drying liquid into powder products in the chemical industry. Its working principle is: spray the material into droplets by spraying and disperse them in hot air, and the material and hot air are in parallel flow. Contact each other in the way of countercurrent or mixed flow, so t...

AI Technical Summary

Problems solved by technology

However, during the spray-drying process of the existing catalyst drying device, the dried material often adheres to the inner wall of the drying tower. Because the material sticking to the wall is difficult to be taken out of the drying tower in time, the sticking material is burnt or burnt. Deterioration affects the quality of the catalyst powder; in order to improve the quality of the product and remove the sticky material in the drying tower, the drying has to be stopped halfway, which results in a long operation cycle, low production efficiency and difficulty in continuous operation

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