Drying device for porous fragile granular products

Abstract

The invention relates to a drying device for porous fragile granular products, and belongs to the technical field of drying equipment. The drying device for the porous fragile granular products includes the public prior art, and is further characterized by comprising two air inlets. Hot air is divided into two branches after being discharged through a hot air outlet (5-3) of a steam radiator, the first branch of the hot air enters a dryer through the axial air inlet (6), and the second branch of the hot air enters the dryer through the tangential air inlet (7). The drying device for the porous fragile granular products has the advantages that due to the fact that drying is carried out through slow axial rotation of primary hot air and slow tangential rotation of secondary hot air, the products are low in moisture, the number of porous fragile grains is small, and the drying device for the porous fragile granular products is quite applicable to products needing to keep the complete crystal shape.

Description

technical field [0001] The invention relates to a drying equipment, in particular to a drying equipment suitable for porous and fragile granular products, and belongs to the technical field of drying equipment. Background technique [0002] Drying equipment is often used in the food, medicine and new material industries, the most common and common ones are airflow dryers, spin flash dryers and vibrating fluidized bed dryers. These dryers are more convenient and suitable for drying common materials, but for some porous and fragile granular products, drying in these dryers is very easy to break. Because the axial air velocity of the hot air in the ordinary airflow dryer tube is 20-40 m / s, the air velocity is too fast and too strong, so it is easy to break the product for the drying of porous and fragile granular products, but if the axial air velocity is reduced , it will reduce the productivity of the product, so it is not applicable; the ordinary spin flash dryer is a kind ...

AI Technical Summary

Problems solved by technology

These dryers are more convenient and suitable for drying common materials, but for some porous and fragile granular products, drying in these dryers is very easy to break

Because the axial air velocity of the hot air in the ordinary airflow dryer tube is 20-40 m / s, the air velocity is too fast and too strong, so it is easy to break the product for the drying of porous and fragile granular products, but if the axial air velocity is reduced , it will reduce the productivity of the product, so it is not applicable; the ordinary spin flash dryer is a kind of dryer suitable for high humidity and high viscosity wet materials, although its axial air velocity is 2-6 m / s, However, under stirring (the speed is generally 100 to 1000 rpm), and the tangential air velocity of the hot air entering the dryer is as high as 30-60 m / s, which is easy to cause the breakage of porous and fragile granular products, and cannot keep the crystal The shape is complete, so ordinary spin flash dryers are not suitable for drying porous and fragile granular products; and for vibrating fluidized bed dryers, because of the short residence time, the porous and fragile granular products cannot be dried Fully remove moisture; fixed bed fluidized bed dryer, because of the classification of particles, a large amount of fine powder is entrained as a "by-product", which will reduce the yield of finished products, so common fluidized bed dryers are also not suitable for porous , Drying of fragile granular products

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