Spray Drying Units for Drying Catalysts

A drying device and catalyst technology, applied in the direction of spray evaporation, evaporator accessories, etc., can solve the problems of affecting the quality of catalyst powder, sticking to the inner wall of the drying tower, and low production efficiency, so as to achieve good chemical stability and avoid material sticking wall, fast drying effect

Inactive Publication Date: 2017-08-25
盐城市钦诚机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Spray Drying Units for Drying Catalysts
  • Spray Drying Units for Drying Catalysts
  • Spray Drying Units for Drying Catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: as figure 1 — image 3 , a spray drying device for drying catalysts, including a centrifugal drying tower 1 with a composite structure of a vertical upper cylinder and a lower cone, a feeding device, a heating device, a cooling feeder 7, a dust removal device and an intelligent control box 15. A hydrophobic layer is provided on the inner wall of the drying tower 1, and a volute hot air distributor 3 and a frequency conversion centrifugal atomizer 2 are provided in the middle of the top of the drying tower 1. The upper guide of the volute hot air distributor 3 The air deflector 19 and the lower deflector 21 are all arranged on the cone 20, the angle between the upper deflector 19 and the axis of the cone 20 is 25-30°, and the angle between the lower deflector 21 and the axis of the cone 20 is The angle is 0°, and the number of upper air deflectors 19 is twice the number of lower air deflectors 21, so that the hot air can be evenly distributed in the drying...

Embodiment 2

[0015] Embodiment 2: as figure 1, as an improvement of the utility model, the front end of the heating device is provided with an air filter 96, the air is filtered by the air filter 96 and sent to the electric heater 10 by the blower 8 to be heated to form hot air, and the hot air passes through After distribution, the volute hot air distributor 3 enters the drying tower 1 in a spiral state and exchanges heat and mass with the atomized material liquid sprayed out from the nozzle of the frequency conversion centrifugal atomizer 2 . The coverage radius of the hot air is relatively large and the distribution is relatively uniform, which can fully and effectively combine with the atomized material liquid, and quickly evaporate the moisture in the atomized material liquid. The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 3

[0016] Embodiment 3: as figure 2 , as an improvement of the utility model, the rest of the structure and advantages are exactly the same as those of Embodiment 1.

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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 utility model 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, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/18B01D1/20B01D1/30
Inventor 徐松荣徐祝亚徐诚
Owner 盐城市钦诚机械科技有限公司
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