SU134199A1 - Device for drying bulk materials - Google Patents

Description

Devices for drying bulk materials are known, comprising a cylindrical heat-insulated casing with a vertical vibratory conveyor enclosed therein, made in the form of a pipe, on which a screw-like working member is fixed. An oscillatory motion is transmitted by means of a vibrator to move the material to be dried in the coolant flow from the bottom upwards from the loading hopper to the unloading tool. However, in these devices, the screw surface of the working body has a constant diameter and angle of inclination of the turns, therefore the material being dried (due to the change in the coefficient of friction) at each turn moves at a different speed.

In the proposed device, this drawback is eliminated by the execution of .m turns of the screw surface of the working pan-head with a uniformly increasing diameter upward and a decreasing angle of inclination. This ensures a constant speed of the transported material.

In the proposed device, the conveyor belt is reinforced with the help of nloc springs assembled from round spring steel rods on the vibrator drive plate. The plate is rigidly connected to a fixed pipe rack that is located inside the conveyor pipe along its axis. On the end wall of the conveyor, paws are fixed, passed through slots in the fixed pipe and carrying a height-adjustable rod at the end, to which movement from the vibrator is imparted. The conveyor can also be made suspended on a spring driven by a vibrator.

Drying can be carried out both by the convective method and by infrared radiation by electric heating elements built into the wall of the cylindrical casing on the side of its inner surface.

FIG. 1 is a schematic diagram of the device, FIG. 2 is a support assembly unit with a drive.

№ 134199-2

A device for drying bulk materials consists of the following main elements; vertical vibratory conveyor, drive, cylindrical insulated casing, screen and fan.

The inner tube 1 of the vertical vibration conveyor is rigidly fastened with the bottom plate 2 to the lower end, and to the drive plate 3 with the upper end. An outer pipe 4 is loosely mounted on the inner pipe, which, by means of three flat springs 5 consisting of a set of round bars of spring steel, is attached to the plate 5 of the actuator. With the help of three paws 6, missed in the slot of the inner tube, the outer tube is connected to a height-adjustable rod 7. A spiral tray 8 is fixed to the outer tube with a diameter increasing evenly upwards and a decreasing inclination angle of the turns. The drive consists of a shaft 9 and an eccentric mounted ball bearing 10. The shaft 9 is driven by means of a V-belt transmission or through a gear. When the drive shaft rotates, the outer ring of the eccentric mounted ball bearing 10 periodically presses the rod 7, while the legs 6 rigidly connected to the stem pass the oscillatory movement of the outer pipe 4 with a spiral tray 8. In addition, due to the deformation of the springs 5, a circular oscillatory movement around the longitudinal si. As a result of the complex oscillatory movement of the outer pipe 4, the material undergoing the movement moves upward along the spiral pan.

Oscillatory movement of the conveyor can also be ensured when it is mounted suspended on springs driven by a vibrator.

The vertical vibratory conveyor is placed in a cylindrical heat-insulated casing // mounted on foundation A, which has a channel B leading to an exhaust fan 12. A screen 13 is placed between the heat insulated casing // and the vibrating conveyor to direct the flow of heat-transfer fluid.

The principle of operation of the device for drying bulk materials is as follows. The material is fed into the lower bunker 14 and as it progresses to the bunker 15 it is subjected to a flow of heat transfer fluid sucked during operation of the fan into the upper windows 16 of the heat insulated casing. The heat carrier heated by electric heaters (not shown in the drawing), mounted into the wall of the heat-insulated casing on the side of its inner surface, is directed along the spiral tray and then through slots (7) into the inner tube / and channel B.

Subject invention

Claims (4)

1. A device for bulk solids, such as polychlorinates, resins, coal, sand, etc., containing a cylindrical heat-insulated casing with a vertical vibratory conveyor enclosed in it, made in the form of a pipe with a screw-like working body mounted on it — a grid that communicates an oscillating movement using a vibrator to move the material being dried in the flow of heat carrier (gases or air heated by electric heaters) from the bottom upwards from the loading hopper to the discharge one, Considering that, in order to ensure a constant speed of transportation of the material at each turn, the screw surface of the specified working body is made with a uniformly increasing upward diameter and reducing its angle. 2. A pop-up device 1, characterized in that, in order to simplify the construction of the conveyor, it is reinforced with flat springs assembled from round spring steel rods on a vibrator drive plate rigidly connected to a fixed stand pipe located inside the conveyor pipe along its axles, and on the end wall of the conveyor paws are reinforced, passed through slots in the fixed pipe and carrying a height-adjustable rod at the end, which receives movement from the vibrator 3. The device according to paragraphs. 1 and 2, characterized in that the conveyor is suspended on springs driven by vibrators. 4. Application in the device according to claims. 1-3 electric heaters, the elements of which are mounted into the wall of the cylindrical casing on the side of its inner surface, with the aim of realizing it as a convective method, and using infrared radiation.