Sanitary bottom air exhaust low-temperature spray drying device

Abstract

The invention provides a sanitary bottom air exhaust low-temperature spray drying device, belongs to the technical field of spray drying for food, and particularly relates to a sanitary bottom air exhaust low-temperature spray drying device. The problems that serious powder sticking and pipe hanging phenomena exist on the inner side and the outer side of an exhaust pipe of an existing spray dryingdevice, the powder character of a high-heat-sensitivity product cannot meet the standard easily, and high-temperature molten products and products prone to moisture absorption cannot be continuouslyproduced are solved. The device comprises an air taking chamber, a main air inlet fan, a bed air inlet fan, a drying tower, air heating equipment, dehumidification and heat exchange equipment, an airexhaust mechanism and a powder catching mechanism. The main air inlet fan blows air through the air heating equipment, and then the air enters a hot air distributor. The bed air inlet fan blows air through the dehumidification and heat exchange equipment and then divides the air into three paths, the first path enters a fixed fluidized bed, the second path enters the front section of a vibrated fluidized bed and the third path enters the rear section of the vibrated fluidized bed. The spray drying device is mainly used for drying and granulating materials.

Description

technical field [0001] The invention belongs to the technical field of spray drying for food, and in particular relates to a hygienic bottom exhaust low-temperature spray drying device. Background technique [0002] Spray drying device is a device that can complete drying and granulation work, and is widely used in medicine, food and other industries. Most of the existing spray drying devices adopt downward cone exhaust or bottom elbow exhaust structure. The exhaust pipe needs to be inserted into the drying room, and the phenomenon of powder sticking to the surface of the exhaust pipe and the inside of the elbow will appear, resulting in the accumulation of powder. Discharge of long-term heating; high heat-sensitivity and high-temperature easy-to-melt products are at the bottom and during the exhaust process, because they are in the exhaust environment, they are easily affected by long-term high-temperature exhaust. When the exhaust temperature exceeds 70°C, it will cause ex...

AI Technical Summary

Problems solved by technology

Most of the existing spray drying devices adopt downward cone exhaust or bottom elbow exhaust structure. The exhaust pipe needs to be inserted into the drying room, and the phenomenon of powder sticking to the surface of the exhaust pipe and the inside of the elbow will appear, resulting in the accumulation of powder. Discharge of long-term heating; high heat-sensitivity and high-temperature easy-to-melt products are at the bottom and during the exhaust process, because they are in the exhaust environment, they are easily affected by long-term high-temperature exhaust. When the exhaust temperature exceeds 70°C, it will cause exhaust The product denatures or melts in the wind, which makes it difficult for the powder properties of highly heat-sensitive products to meet the ideal standards, and continuous production of high-temperature melting products cannot be carried out; moreover, in the exhaust air, there is water vapor entrained in the air intake and water evaporated from the material Steam, so the moisture content is high, and the dew point temperature is high. During the exhaust process, the exhaust air temperature will drop through pipeline transportation and powder capture equipment. When the temperature is close to the dew point temperature, the water vapor in the exhaust air will condense and precipitate. Contact with the product will easily cause the product to absorb moisture and condense, making it impossible for continuous production of moisture-absorbing products

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