Fluidized bed dryer

Abstract

The invention relates to a drying device, in particular to a fluidized bed dryer. A fluidized bed body, a heater, an air blower, an induced draught fan and a cyclone separator are included; the two sides of the fluidized bed body are provided with a wet material inlet pipe and a dry material outlet pipe correspondingly; a bottom connection pipe of the fluidized bed body communicates with the heater which communicates with the air blower; a filter is arranged in a pipeline between the heater and the air blower; a top connection pipe of the fluidized bed body communicates with the cyclone separator; and a top outlet of the cyclone separator communicates with the induced draught fan. According to the fluidized bed dryer, the outer wall face of the wet material inlet pipe is sleeved with a boxbody, the inner wall of the box body and the outer wall of the wet material inlet pipe form a cavity, heat media flow through the cavity, wet materials are dried in advance, and therefore the defectsthat caking is caused when the wet materials enter a bed body in the prior art and drying unevenness is caused, and discharging of products is affected are reduced.

Description

technical field [0001] The invention relates to a drying device, in particular to a fluidized bed dryer. Background technique [0002] Fluidized bed technology (also known as fluidized technology) originated in 1921. Fluidized bed dryers are also called fluidized bed dryers. Fluidized drying refers to the process in which the drying medium makes solid particles dry in a fluidized state. Its working principle is: the granular solid material is fed into the fluidized bed dryer by the feeder, and the filtered clean air is heated by the heater and sent to the bottom of the fluidized bed by the blower, and is in contact with the solid material through the air distribution plate, and is solid Form a strong turbulent flow, fully mix with hot air to absorb heat, exchange heat between gas and solid, and achieve the purpose of drying. After drying, the material is discharged through the discharge port, and the waste gas is discharged from the top of the fluidized bed, and the materia...

AI Technical Summary

Problems solved by technology

[0003] In the fluidized bed dryer in the prior art, when the wet material enters the larger space inside the fluidized bed, the space suddenly becomes larger, and the wet material mixed together forms a material block due to the mutual viscous stress. , the hot air cannot blow up the agglomerated material to achieve the drying effect, and the agglomerated material will fall to the bed body of the fluidized bed, blocking the outlet of the air distribution plate and affecting the overall performance of the fluidized bed

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