Fluidized bed type dryer and drying method

Abstract

This invention provides a fluidized-bed dryer. Said device dries the treating object B supplied in a device body 1 by forming a fluidized bed C by flowing the treating object B by flowing gas A. In the device body 1, an agitating means 13 composed of an agitating blade 12 rotatable by a rotary shaft 11, and agitating the treating object B in the fluidized bed C is provided under a supply port of the treating object B in the device body 1. Said device capable of preventing the situation such as hindering a flow since a treating object becomes a mass shape even when drying the treating object having the large moisture content, and the treating object strong in an adhesive property.

Description

technical field [0001] The present invention relates to a fluidized bed drying device and a drying method, which use flowing gas to form a fluidized layer of the treated material supplied into the main body of the device to dry it. Background technique [0002] The fluidized bed drying device sprays high-temperature flowing gas (generally air) at a high speed from the dispersion plate at the bottom of the device main body to make the treated material supplied to the device main body flow and form a fluidized layer. A device that disperses the treatment material in the fluidized bed and simultaneously contacts it with high-temperature flowing gas to dry it. Such a fluidized bed drying device has fewer movable parts and a simple structure, and is easy to maintain and operate, and the device can be formed into a small size with a small footprint, cheap price, and has a larger heat capacity coefficient than other drying devices. It can adapt to the drying of processed objects w...

AI Technical Summary

Problems solved by technology

[0003] However, in such a fluidized bed drying device, in order to disperse and dry the treated matter with the flow of the above-mentioned flowing gas, when drying the treated matter with a relatively large water content or strong adhesion, there will be a supply of The treated matter cannot be sufficiently dispersed and condenses to form a lump with only the surface being dried, and sinks to the bottom of the fluidized layer intact

And, once such treated matter sinks and stays in the bottom of the fluidized layer in a block shape, it not only hinders the ejection of the flowing gas, but also cannot make the flow of the treated matter flow itself by the flowing gas, so that the fluidized layer cannot be formed. Hazards of drying out

On the other hand, in order to solve this problem, it is possible to move the massive treatment objects staying at the bottom of the fluidized bed by greatly increasing the flow rate (air volume) of the above-mentioned flowing gas. However, when the air volume of the flowing gas is too large, the Normal particles that flow in the fluidized layer will be scattered, so there is a certain limit to the movement of lumps by increasing the air volume in this way

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