SU556294A2 - Fluid Bed Vibration Dryer for Bulk Materials - Google Patents

Description

one

The invention relates to a drying technique.

Vibro dryers are known for its granular and granular materials, the drying chamber of which is vibrated with circular oscillations made in the form of a pair of dual flywheels placed on both sides of the dryer body, one of which is fixed on the shaft motionless and the other can be rotated adjustment period, unbalances are spring-loaded and installed in the ring groove of the flywheels, symmetrically with unbalances

1 The oscillation amplitude of said vibratory driers does not vary remotely and smoothly during the process. her work. The spring stiffness in the unbalances changes over time, therefore the spring cannot hold the unbalance in the required position at the starting moment, when passing through the resonance speed.

The closest technical solution to the one described is a fluidized bed blow dryer for bulk materials, the drying chamber of which is equipped with a vibrating actuator of circular oscillations and consists of at least two horizontal drums, in which the bottom part of their cylindrical surface 2J serves as a grille.

However, in said internal drier, also, the oscillation amplitude cannot be changed remotely and smoothly during operation. When you turn on the electric drive of the spin drive, the dryer undergoes additional loads during the progress of resonance vibrations.

The invention, the improvement of the described technical solution, aims to determine the heat and mass transfer by remotely controlling the amplitude of the oscillations of the drying chamber during operation in a wide range.

This is achieved by installing a running adjusting screw with left and right threads parallel to the vibrating drive of circular oscillations, which are equipped with nuts with shift forks, acting through the thrust bearings with movable unbalances placed on the vibrating drive shaft, and the vibrating drive shaft and the driving screw with individual propellers placed on the vibrating drive shaft, and each with individual driving drives of the vibrating drive and the driving screw have individual drive shaft of the vibrating drive, and the vibrating drive shaft and the driving screw have individual drives placed on the vibrating drive shaft, and the vibrating drive shaft and the driving screw have individual driving motors on the vibrating drive shaft;

FIG. 1 is a schematic representation of an on-drier dryer; in fig. 2 is a section along the line A-A in FIG. one.

The vibrating dryer contains a drying chamber consisting of two horizontally arranged drums 1, 2 installed on elastic supports 3. The gas distribution grids 4, 5 serve the lower part of the corresponding drum 1, 2, each of which is connected to the inlet duct 6 and a gas outlet a diffuser 7. The air duct 6 and the diffuser 7 communicate with the inlet and outlet nozzles of the drums 1, 2 by flexible connections 8. The working drums 1, 2 are rigidly connected with. podshiiikovymi nodes in which the shaft is installed 9 vibrating circular oscillations. On each of the sides of the shaft 9 there are located 10, 11 and fixed 12, 13 debalais. The balance of the balance is on the driven shaft with the keys 14 and 15. On the shaft 9 there are screw grooves 16. Parallel adjustment of the shaft 9 of the vibrodrive is a running adjusting screw 17 with left and right threads. On the threads of the screw 17 there are nuts with forks 18 for switching, which interact with the movable unbalances 10, 11 through thrust bearings 19 mounted on the shaft 9 of the vibrodrive. The lead screw G / is connected by a coupling with an electric motor 20, the shaft 9 of the vibratory drive by an elastic coupling 21 - with an electric motor 22.

Vibration dryer works as follows.

The dispersed material is continuously supplied to the vibrating drums 1, 2. At the same time, the heat transfer medium enters the material layer from the duct 6 through the gas distribution grids 4, 5. Under the action of vibration, the material passes into a vibro-boiling state — and moves along the gratings 4, 5 to the discharge port.

The rotation from the electric motor 22 through the flexible coupling 21 is transmitted to the shaft 9 of the vibro-drive. When you turn on the electric motor 22 movable 10, 11 and fixed 12, 13

The debalays are rotated 180 ° relative to each other, therefore their disturbing force is zero. Upon reaching full revolutions of the shaft 9 of the vibrodrive, after passing the resonant number, the electric motor 20 is turned on. Rotation from the electric motor 20 through an elastic clutch is transmitted to the traveling adjusting screw 17. At the same time, the nuts with shift forks 18, moving along the screw 17, move the mobile unbalances 10, and screw grooves 16. There is a gradual increase in centrifugal force, reaching a maximum at a turning angle of debalais equal to zero.

By changing the direction of rotation of the lead screw, it is easy to regulate the amplitude of oscillations of the drying chamber remotely and clearly during its operation.

Claims (2)

1. Vibration dryer for a bulk material according to ed. St. No. 479940, characterized in that, in order to intensify heat and mass transfer by remotely adjusting the oscillation amplitude of the drying chamber during operation in a wide range, a running adjusting screw with left and right threads is installed parallel to the circular vibration drive and fitted with gear knobs that interact through universal bearings with movable unbalances mounted on the vibration drive shaft. 2. The vibration dryer according to claim 1, excluding that the shaft of the vibro-drive and the lead screw are equipped with individual drive motors. Sources of information taken into account in the examination: 1.Avt. St. L 473040, class F 26B 17/10, 1974. 2. Avt. St. Ho 479940, cl. F 26B 17/10, 1973. 7 / / S18 / 7 fpuz.l /; 6 4lA / 9 -12 LL I: / l I 3