Rotary dryer

Abstract

A rotary dryer, wherein a mechanism having a discharging action in reverse rotation is provided inside a drying drum and the drying drum is rotated reversely in a process where drying substance is discharged, and also the dried object and drying substance are prevented from being dispersed at the time of charging and discharging them, a plurality of the drums are provided continuously and a specified relation is given between the rotating direction, time, and speed of each drum so as to reduce an operational play of each drum in order to increase the efficiency of the entire dryer.

Description

technical field [0001] The present invention relates to a device that not only makes the dryness of the dried object uniform, but also discharges the dried object simply and accurately. Background technique [0002] For a drying device that puts the object to be dried into a drying drum (hereinafter referred to as: drum), and sends hot air to dry it while rotating the drum, according to the shape and characteristics of the object to be dried, such as fluidity, vulnerability, specific gravity, particle size, The moisture content, the speed of drying, the amount of the object to be dried, etc. determine the diameter and length of the drum, and design the most suitable drying drum. For the previous rotary drying device, the following structures are used: such as Figure 4 As shown, the cylindrical outer drum (11) equipped with a conveying lifter (16) is placed horizontally and rotates in only one direction. A type of structure in which a screw type discharge mechanism is provi...

AI Technical Summary

Problems solved by technology

[0004] It is said that the structure of the continuous discharge type, in which the horizontal drum is rotated in only one direction to dry the object to be dried, and provided with a spiral discharge mechanism, is suitable for a large number of objects to be dried, but the length of the drum becomes longer. , and an additional discharge device is required, which increases the installation cost

[0005] For the structure of the type in which the drum is inclined in order to facilitate the discharge of the dried object, in this case, when the drying time of the object to be dried is constant, the automation of the discharge process is easy to realize. However, in the form of the object to be dried , When the characteristics are indeterminate or changing, that is, to maintain a certain dryness of the dried object and then perform discharge treatment, the control system will become complicated and difficult to implement

[0006] The type that keeps the drum in a horizontal state to dry the object to be dried, and keeps the drum rotating during discharge and discharges the object to be dried obliquely has the following problems: Although the dryness can be controlled by extending or shortening the drying time according to the shape and characteristics of the object to be dried Certainly, however, since the drum must be tilted during discharge, a device for tilting it is also required

In particular, in the case of a drying device in which hot air is sent not only from the inside of the drum but also from the outside, the mechanism for tilting must be heat-resistant, which increases the cost of the device.

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