Spray gun without using air atomization slurry and slurry-spraying granulation method

Abstract

The invention discloses a spray gun without using air atomization slurry and a slurry-spraying granulation method. The spray gun comprises a nozzle. A through hole in the shape of a bell mouth is formed in the nozzle, the side, where the end opening of the large caliber is located, of the nozzle through hole is provided with a spray gun branch pipe in a welded mode, the side face of the spray gun branch pipe is connected with a slurry feed pipe, and the slurry feed pipe is connected with the spray gun branch pipe in a tangential line mode. The side, where the end opening of the small caliber is located, of the nozzle through hole is provided with a threaded short section in a welded mode, the threaded short section is connected with a spray head in a threaded mode, the spray head is of a long tubular shape, spray holes for slurry spraying are formed in the spray head, the calibers of the two ends of each spray head spray hole are different in size, and the end openings of the large caliber of the spray head spray holes and the end openings of the small caliber of the spray head through holes are communicated. When slurry-spraying granulation is conducted by the adoption of the spray gun, no air compressor needs to supply an air source for the spray gun and slurry atomization can be achieved, the investment of the air compressor is saved, the production cost of enterprises is reduced greatly, the operation difficulties are reduced as well, and the production flow is simplified.

Description

technical field [0001] The invention relates to a spray gun used in a spray granulation method, and more specifically relates to a spray gun and a spray granulation method which do not need to use air to atomize slurry, and belongs to the technical field of chemical industry. Background technique [0002] Solid drying is the process of using heat energy to vaporize the moisture in the wet material, and the water vapor or steam is taken away by the air flow or vacuumed to obtain a solid product. There are four main drying methods: drum drying, spray drying, spray granulation drying, and rotary drum drying. The common drying methods in chemical production are spray drying and spray granulation drying. Spray drying is suitable for the production of powdered MAP. Shot granulation drying is suitable for the production of GMAP. [0003] In the prior art, spray granulation drying is a process that integrates spraying, granulation and drying, and is completed simultaneously in a ro...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this kind of granulation method is that the temperature difference between the compressed air and the slurry is large, which easily leads to frequent blockage of the spray gun; in addition, the air compressor consumes a lot of power and the equipment fails frequently, which greatly affects the stability of production.

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