SU703129A1 - Device for granulating moist materials - Google Patents

Description

(54) DEVICE FOR GRANULATION OF WET MATERIALS

one

The invention relates to the chemical industry, in particular, to devices for producing materials in granular form from wet materials by crushing with rotating elements while being dried.

A device for granulating wet materials in a fluidized bed is known, comprising a vertical cylindrical chamber equipped with nozzles for introducing and withdrawing material, a gaseous heat carrier and pellets, a shaft mounted along the chamber axis, having conical shape fixed to the bottom, fixed to the shaft the camera fixed rods placed between the mixing rods 1.

The known device does not provide intensive dispersion, since it operates at a low speed of movement of the rods. With an increase in the speed of movement of the rods, the fluidization of the material is disturbed, which accounts for the impossibility of intensifying dispersion.

The aim of the invention is to intensify the process.

This is achieved by the fact that the chamber is provided with plates bent along the cylinder, fixed with one edge on the wall of the chamber and facing toward it with a convex side.

FIG. 1 shows a device, a vertical section; in fig. 2 - section A-A of FIG. one.

The device consists of a chamber 1 to which a nozzle 2 for supplying the source material, a nozzle 3 for supplying a hot heat carrier, a nozzle 4 for leaving the processed material and a heat transfer medium are attached.

Inside the chamber 1, guides, made in the form of plates bent along the cylinder 5, are installed. The height of the plate exceeds not less than the height of the part of the shaft with scourges.

Claims (2)

A shaft 6 is installed along the axis of the chamber 1, the lower part of which is made in the form of a truncated cone, facing upwards with a smaller base. The conical part of the shaft takes at least 20 ° / o of the total length of the shaft. The rods 7, made in the form of plates, are mounted on the shaft 6 at a distance of at least half the diameter of the chamber from the outlet nozzle. The bent plate is installed in such a way that one edge touches the chamber, the second edge is located at a distance of not less than 1 mm from the circumference described by the edge of the rod. The device works as follows. Hot coolant is continuously fed into chamber 1 through nozzle 3, it passes the device from bottom to top and leaves it through nozzle 4. The rods 7, mounted on shaft 6, perform a rotational motion as the shaft moves. The original wet material is fed into the chamber 1 through the pipe 2. When falling down in chamber 1, the source material is classified into classes of different size by the upward flow of heat-transfer agent. Pieces smaller than a given size are carried away by the flow of coolant from chamber 1 through nozzle 4. Pieces of source material larger than a given size, the soaring rate of which is higher than the flow rate of the coolant, fall downwards through chamber 1, washed by the flow of coolant and dried. Having reached the zone of movement of the first row of rod 7, the large pieces are subjected to the action of percussion and cutting forces arising from the collision with the rod. The resulting new pieces are classified by the gas flow. : Pieces whose soar speed is lower than the coolant flow rate are carried by the gas flow upwards from the crushing zone. Pieces whose soaring speed is higher than the flow rate of the heat transfer fluid are thrown against the wall of chamber I. Reaching the chamber wall, each piece slides (rolls) along it and enters the guide plate 5, which changes the direction of movement of the piece and directs it to the area of rods . Crushing is carried out until the size of the formed new pieces allows the upward flow of the coolant to be thrown out of the area of the rods. Taper ba.ta b Determines the increase in the flow rate of the heat transfer medium in the lower part of the device. Therefore, the bottom rows of rods reach large pieces of material. Parts from the crushing of these pieces of heat carrier flux rise upwards, due to which step-by-step intensive crushing is carried out with continuous separation of the formed rounded pieces (molds). Consequently, returning to the central part of the chamber by means of a guide plate of pieces of material thrown off by centrifugal force against the wall of the chamber allows one to maintain the fluidization state and to carry out intensive dispersion of the wet material. Apparatus of the Invention A device for granulating wet materials, comprising a vertical cylindrical chamber equipped with nozzles for input and output of material, a gaseous heat carrier and granules, a shaft mounted along the axis of the chamber, having a conical shape in its lower part, and rods fixed to the shaft In order to intensify the process, the chamber is equipped with plates bent along the cylinder, fixed with one edge to the chamber wall and facing toward it with a convex side. Sources of information taken into account in the examination 1. US Patent No. 3592395, cl. 241-18, 1971, (prototype). 703129 A-A (rig 2