Centrifugal spray drying apparatus capable of preventing catalyst from adhering to walls

Abstract

The present invention relates to a centrifugal spray drying apparatus capable of preventing a catalyst from adhering to walls. The apparatus comprises a centrifugal drying tower, a feeding apparatus, a heating apparatus, a cooling feeding device, a dust removal and evacuation apparatus and an intelligent control box; the middle of the top of the drying tower is provided with a volute hot air distributor and a variable frequency centrifugal atomizer, a heating apparatus is connected to an air inlet of the volute hot air distributor via a hot air pipeline, the cooling feeding device is mounted on the bottom of the drying tower, the upper side wall of the inside of the drying tower is provided with a cloth filter chamber, the bottom of the cloth filter chamber is open, the outer side of the drying tower is provided with a cooling sandwich layer, and the intelligent control box is connected to the variable frequency centrifugal atomizer, a material conveying pump, the heating apparatus, the cooling feeding device, an air outlet fan, an induced draft fan and an electric butterfly valve via wires, and working parameters of the whole drying apparatus are controlled accurately. The apparatus is high in drying speed and simple and stable in operation, and the circumstance that materials are adhered to walls is avoided, so that drying quality of the catalyst and the continuity of the drying operation are improved.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst drying and granulation spray drying device, in particular to a centrifugal spray drying device capable of effectively preventing catalyst materials from sticking to walls in a drying tower. 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 dis...

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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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