Counter-flow type spray drying equipment

Abstract

Counter-flow type spray drying equipment is provided by the invention, and comprises a tower body, an atomization feeder is arranged at the top end of the tower body, the bottom end of the tower body is in an inverted cone shape and is provided with a discharging port, a plurality of hot air ports are formed in the tower body, mist outlets of the atomization feeder are vertically downward and annularly distributed, a plurality of hot air ports are also vertically upward and annularly distributed, and the ring line where the hot air ports are located and the ring line where the mist outlets are located are staggered and concentric. Through the mist outlets and the hot air ports which are annularly arranged in a staggered manner, mist drops sprayed out of the mist outlets annularly flow downwards, hot air sprayed out of the hot air ports annularly flow upwards, staggered reverse flow is formed, the contact time is shortened while the contact area is increased, the airflow condition in the tower body is improved, and the product drying and forming effect and efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of drying, in particular to a countercurrent spray drying equipment. Background technique [0002] The spray drying tower is a kind of drying equipment that puts the raw material liquid into the atomizer and separates it into mist droplets, and obtains powder-shaped products by means of direct contact with hot air and mist droplets. It has the advantages of fast drying speed, high production efficiency, It has the advantages of convenient operation and suitable for large-scale production. It is widely used in the drying of biological pesticides, medicines, food microorganisms and other fields. The existing spray drying tower usually feeds the spray and the hot air in the same direction to form a flow in the same direction, making it difficult for the sprayed droplets to contact the hot air in a large area in a very short time, resulting in poor drying effect, thus making the production The product quality i...

AI Technical Summary

Problems solved by technology

The existing spray drying tower usually feeds the spray and the hot air in the same direction to form a flow in the same direction, which makes it difficult for the sprayed droplets to contact the hot air in a very short time, resulting in poor drying effect, thus making the production The product quality is difficult to meet the requirements

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