SU1473870A2 - Separator of powder materials - Google Patents

Abstract

This invention relates to the classification of polydisperse materials into fractions by size and may be. used in power engineering, chemical technology, cement industry. The purpose of the invention is to increase the efficiency of classification due to multiple vortex movement of the material. The separator has an outer 1 and an inner 2 cylinder-conic chambers with lids 3 and 4. Between chambers 1 and 2 there is an additional cylinder-conical chamber 7 forming a cavity 8 with chamber 2, in the upper part of which there is a flow curler with rotating blades 9. The lids 3 and 4 form centrifugal separation stage 6. Cavity 8 is a gravity separation stage. Between the inner cylindrical and additional cylindrical chambers there are tapes 14 and 15. They are fixed spirally with an inclination in the direction to the rotating blades. The tape 14 is fixed on the wall of chamber 2, and the tape 15 is on the wall of chamber 7. Above the fastening lines of tapes 14, 15, windows 16 are made in the walls of chambers 2 and 7. The raw material mixed with the transporting agent enters the cavity 8 where it acquires a vortex movement, meeting on its way the ribbons 14 and 15. Participating in multiple vortex movements, the source material is effectively cleaned of coarse fractions that are deposited on the walls of chambers 2 and 7 through windows 16. 1 Il.

Description

The invention relates to devices for classifying polydisperse materials into fractions by size, can be used in energy, chemical technology, cement industry and other industries and is an improvement of the invention by ed. St. No. 1036401.

The purpose of the invention is to increase the classification efficiency due to repeated vortex movement of the material.

The drawing schematically shows the design of the separator.

The separator for separating powdered materials includes an outer 1 and an inner 2 cylinder-conical chambers with covers 3 and 4. On the cover 3 of the outer chamber there is a pipe 5 for 1 removal of fine fractions and a transporting agent. Lids 3 and 4 form a centrifugal separation stage 6. Between the chamber 2 and the lid 4 there is an annular gap for withdrawing part of the separated coarse fractions from the separation stage 6. Between the cylinder-conical chambers 1 and 2, there is an additional cylinder-conical chamber 7, which forms a cavity 8 with a chamber 2, in the upper part of which a flow swirl 7 with rotary blades 9 is installed. The coarse material is removed from the separation stages and removed from the device through pipes 10-12. The supply of the mixture of the source material with the transporting agent is carried out through the loading pipe 13 in ^{: the} cavity '8 between the chambers 2 and 7. The cavity 8 is a gravitational separation stage. On the walls of the inner cylinder-conical chamber 2 and the additional cylindrical-conical chamber 7, tapes 14 and 15 are helically fixed with an inclination towards the rotary blades 9. Over the lines of attachment of tapes in the walls of the chambers 2 and 7, windows 16 are made into the chamber 2 and into cavity between <chambers 1 and 7.

The separator works as follows.

The source material in a mixture with a transporting agent is fed into the separator through the nozzle 13 and enters the cavity 8. Here, the source material winds in its path of the tape 14 and 15 and acquires a vortex movement in the vertical cavity 8. Vortices are formed along the entire height of the gravity separation stage under each of the turns of the tape. Participating in multiple vortex motion, the starting material is effectively cleaned of coarse fractions that are deposited on the walls of chambers 2 and 7, and through windows 16 and then through nozzles 10 and 11 are removed from the separation zone. Next, the source material, purified from coarse fractions, 5 passes through the rotary blades 9 and enters the centrifugal separation stage 6.

Here, under the action of centrifugal forces, the remaining coarse fractions are removed from the material, which are removed from the apparatus through nozzles 10-12. The separated fine fractions together with the transporting agent are removed from the separator through the pipe 5.

The granulometric composition of the classification products is regulated5 by changing the installation angle of the rotary blades 9.

Tapes are installed to create local vortex flows in the first separation stage. The combination of attached vortices leads to intensive transverse mixing of the carrier flow and the powder material carried in it, which, in turn, is accompanied by the alignment of the average parameters of the dust and gas stream along the flow section and a significant reduction in the effect of flow inhomogeneity in the absence of tapes. The latter is the reason for increasing the separation efficiency. Local distortion of the flow (the formation of a totality of vortices) does not contradict the increase in its uniformity on average, since the scale of the vortices is much less than the length of the step, namely, its length determines the clarity of the classification.

Claims (1)

Claim Separator for the separation of powdered materials according to ed. St. No. 1036401, characterized in that, in order to increase the efficiency of classification due to multiple vortex movement of the material, the separator is provided with ribbons located between the inner cylindroconical and additional cylindroconic chambers, which are fixed spirally with an inclination in the direction of the rotating blades, one of which is fixed on the wall of the inner cylindroconical chambers, and the other on the wall of an additional cylindrical conical chamber, while above the tape fastening lines in the walls of the inner cylinder nical and more of cylindrical chambers are made windows.