SU1000706A1 - Unit for drying and disintegrating dispersed materials in suspended bed - Google Patents

Description

(54) INSTALLATION FOR DRYING AND CRUSHING DISPERSED MATERIALS IN A WEIGHTED LAYER

The invention relates to the technique of grinding and drying dispersed materials and may find application in the chemical, metallurgical and other industries of the industry.

Known pneumatic tube dryer, in which the separation of the dispersed phase from the dust-gas flow is carried out in the expander, made in the form of a tank connected to a pneumatic tube

A disadvantage of the known dryer is the short residence time of the material being dried in the heat treatment zone.

The weight of the gn is also a plant for drying and grinding dispersed materials in a suspended layer, containing a cylindro-conical drying chamber, a chopper made in it, made in the form of a shaft with rods fixed to it, and a dried material outlet system with a dust collector 2.

The disadvantages of the known installation are the low degree of trapping of the dried material and the high flow resistance due to the high concentration of the dispersed material in the waste stream.

The purpose of the invention is to increase the degree of trapping of the dried material and reduce the hydraulic resistance.

This goal is achieved by the fact that a capacity is added to the dried material outlet system, which is conjugated to the drying chamber along the height of its cylindrical part with the formation of a slot, the length of which is 0.1-0.9 times the latter, and the chamber and capacity additionally communicated by means of a surge tube passing through the slit hole.

On .fig.1 shows the proposed installation; figure 2 - section aa in figure 1; on fig.Z - view along the arrow in figure 2.

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The installation contains a cylinder-conical drying chamber 1 with nozzles of the inlet 2 and outlet 3 of the heat carrier and the nozzle 4 of the material input, from the grinder 5, made in the form of a wa25 with rigidly fixed on it

rods, coupled with the drying chamber 1 tank 6 and equalizing tube 7.

Claims (2)

The installation works as follows. The initial wet material is supplied through the pipe 4 to the lower part of the drying chamber 1 and a suspended layer is created by the heat flow. As it dries, the dispersed material is carried to the conical part of the drying chamber 1, where under the action of the chopper 5 it acquires a rotational movement. The dried material, moving along the wall of the conical part of the drying chamber 1, reaches the upper cylindrical part and through the slit opening formed by the conjugation of the chamber 1 and the tank 6 is thrown out by the centrifugal force at the last. Equation tube 7 performs the equalizer functions. The proposed installation together with a cyclone, for example, of the type TsN-15, allows to extract 99.5-99.9% of dispersed material from a piezo-gas flow. Claims An apparatus for drying and grinding dispersed materials in a suspended layer, comprising a cylindrical drying chamber, a chopper arranged therein, made in the form of a shaft with rods fixed to it, and a dried material outlet system with a dust collector, characterized in that increasing the degree of trapping of the dried material and reducing the hydraulic resistance, the capacity connected to the drying chamber along its height The cylindrical portion forms a slot, the length of which is 0.1-0.9 of the diameter of the latter, the chamber and the container being additionally communicated by means of a balancing tube passing through the slot opening. Sources of information taken into account in the examination 1.Lykov M.V. Drying in the chemical industry. M., Himi, 1970, p. 229. 2. Authors certificate of the USSR W 568822, cl. F 26 B 17/10, 1975.