SU926470A1 - Loose material layer - Google Patents

Description

The invention relates to a technique for drying bulk materials in a fluidized bed and can be used in chemical, food and other industrial fields.

A well-known dryer for bulk materials, comprising a cylindrical body with inlets and outlets of a gaseous coolant and material, a gas distribution grid and a rotary chopper placed above it with a fine and coarse element made in the form of concentric rows of movable and fixed fingers 1.

A disadvantage of the known dryer is the duration of the grinding and drying process.

The purpose of the invention is to intensify the processes of grinding and drying of bulk materials.

The goal is achieved by the fact that the rotor grinder is equipped with hinged plates, and in the area of their placement on the side surface of the housing there is a tooth comb, which is in contact with the plates of the shredder.

Figure 1 shows the dryer, total V1id; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1; figure 4 - node 1 in figure 2. The dryer includes a housing I with a nozzle 2 for supplying a gaseous heat carrier, a nozzle 3 for loading material and a nozzle 4 for withdrawing from the dryer together with the exhausted heat carrier of crushed and dried material.

The gas distribution grid 5 is located in the lower part of the body.

15 with concentric rows of fixed fingers fixed on it 6.

Above the gas distribution outlet 5 along the axis of the apparatus is placed a rotary chopper, containing a perforated disk 8 fixed to the drive shaft 7 with the elements of coarse and fine grinding placed on it.

The blades 9 fixedly mounted on the disk 8 for circulation of the dried material and the fingers-10 are sent to the coarse grinding elements, and to the element of fine grinding oTko are hinged on the disk

30 8 plate 11 and a toothbrush comb 12 in contact with them located on the side surface of the housing 1

The dryer works as follows.

The initial wet material is fed into the apparatus through the nozzle 3, through the holes in the disk 8 into the coarse grinding zone, carried out by the moving fingers of the rotor 10 and the fixed fingers of the b lattice. The gaseous coolant supplied through the nozzle 2 under the grate 5 causes the material to be dried into a fluidized state, which under the action of centrifugal forces will move from the center of the apparatus to its periphery and from there the blades 9 are fed to the fine grinding zone for crushing and rubbing between the toothed comb 12 and movable plates 11 of the rotor.

During the grinding process, the material is subjected to intensive drying in a fluidized bed due to the developed surface of the particles of the material being dried with a gaseous coolant.

The crushed and dried particles are carried away by the spent coolant from the dryer through the pipe 4 and are fed to the separation.

Claims (1)

1. USSR author's certificate No. 230730, cl. F 26 B 17/10, 1967. / I- / I 2 Bs to Fig.Z 12 i {