SU494579A2 - Fluid Bed Vibration Dryer for Bulk and Granular Materials - Google Patents

Description

one

The invention relates to a drying technique.

According to the main author. St. No. 449217, a known vibrating dryer for bulk and granular materials, for example chemical products, contains, and a working chamber mounted on shock absorbers with a gas distribution trough of an i-shaped profile and a balanced vibrator, the chamber being annular, and the groove in the form of a half, and the axis of the vibrator is combined with the axis cameras, and his cargoes are unbalanced.

The purpose of the invention, the intensification of heat and mass transfer, is achieved by the fact that the chute is placed in an upward spatial spiral with coils of equal diameter.

FIG. 1 shows schematically the proposed vibratory dryer; FIG. 2 is a section along A-A in FIG. one; in fig. 3 is a cross section of the groove and the trajectory of the transverse movement of the material.

The vibratory dryer consists of a working chamber, a fixed confuser 2 and an air supply box 3. The bottom surface of the chamber 1 is perforated and forms a groove 4.

The outer lateral surface 5 of the chute 4 has a rounded shape, and the inner 6 is straight and connected, for example by welding, with a central hollow cylinder 7. The lower turn of the chute is provided with a device 8 for

material loading, and the upper turn - device 9 - for unloading. Inside the central hollow cylinder 7, a vibrator is mounted on the seats 10 and with upper and lower weights 12. The shaft 13 of the vibrator 11 is mounted vertically.

But the circumference of the annular base of the chamber on the foundation 14 is fixed shock absorbers-spring 15, which is installed

camera 1 vibrodryers.

The principle of operation of the vibrating dryer is as follows. The material is continuously fed into the loading device 8 and as it advances in the working chamber 1 to the unloading device 9, it is dried by a coolant entering the vibro-boiling layer of material through the air inlet duct 3 and the perforated wall of the groove 4. The humidified coolant is removed through

confuser 2. The working chamber 1 is installed on the springs 15 and, when the vibrator 11 is operating, oscillates in different directions along a closed circular path under the action of the disturbing force of the shaft 13 with an unbalanced

a mass of goods 12. Under the action of forced vibrations of the vibrator, the material entering the working chamber 1 performs a rotational movement opposite to the rotation of the shaft 13 of the vibrator. As a result of the imposition of vibration effects, as well as

heat carrier flows, the material is mixed in two planes circular (along arrow a in Fig. 3) in the section plane of trench 4 and along the axis of the coil of the working chamber from bottom to top (along arrow b in Fig. 1). The rounding of the side surface 5 of the chute 4 eliminates additional swirling of the material with mixing in the upper part of the working chamber 1. Additional swirls occur when the transverse U-shaped section of the chute 4. This eliminates additional hydrodynamic resistances.

The vertical position of the shaft 13 of the vibrator 11 reduces vibrations transmitted to the foundation, since the vibration occurs in the horizontal plane.

The vibrating dryer works with less noise and is more compact. The size and amplitude and frequency of vibration determine the mode and performance of the proposed dryer.

Subject invention

Fluid Bed Vibration Dryer for bulk and granular materials according to the main author. St. No. 449217, characterized in that, in order to intensify heat and mass transfer, the trough is arranged along an upward spatial spiral with coils of equal diameter.

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