SU1632516A1 - Centrifugal countercurrent separator - Google Patents

Abstract

The invention relates to the separation of bulk materials and m. used, for example, in the asbestos industry for the dehydration of concentrates, as well as for the dedusting of grain, cotton, and other bulk and fibrous materials. The purpose of the invention is to increase the separation efficiency by eliminating mixing of the starting material with the separation products. Separator contains cylinder

Description

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The main body 1 with the nozzles of the feed material supply, the output of heavy and light fractions. Inside the housing 1, a working separating body (CO) 2 with blades 3 and a spreading disc (RD) rigidly fixed in its lower part 4 is mounted for rotation. Under RD 4 inside the housing and coaxially with the base upwards, the housing 1 is installed. with a gap of 5 and concentric, a cylinder-conic separation surface (RP) 6 is installed. The upper edge of RP 6 and the lower edge of CO 2 are located at the same level. The source material is fed to RD 4. The particles of RD 4 material are discharged to RP 6, where the heavy particles are directed to the cone 1 and slide along its surface to the nozzle 11. Light particles enter CO 2 and are twisted. After hitting the wall of the housing 1, the particles enter the nozzle without mixing due to the installation of SPM 6 with the source material. Exhaust air with dust is removed through pipe 10. 1 sludge. 1 tab.

The invention relates to devices for the separation of bulk materials into fractions and can be used, for example, in the asbestos industry for the dehydration of asbestos concentrates, as well as for the dedusting of grain, cotton and other bulk and fibrous materials. The purpose of the invention is to increase the separation efficiency by eliminating mixing of the starting material with the separation products.

The drawing shows a separator, a general view.

The centrifugal countercurrent separator contains a cylindrical-conical case 1, in the cylindrical part of which a working separating body is placed coaxially with it in the form of a fan wheel with blades 3. A spreading disk 40 C with a gap 5 to the case 1 is installed under the fan wheel and concentric separation surface 6, its upper border is at the level of the base of the working separating body 2. In the conical part of the housing 1, an inverted cone 7 is axially mounted with the possibility of axial movement, made hollow and closed. The separation surface 6 is cylindrical conical in shape. On the cylindrical part of the housing 1, the guide fins 8 are placed. The separator is also equipped with loading 9 and discharge 10 and 11 devices for light and heavy fractions, respectively. The discharge device 10 is placed in the upper part of the separator and connected to a pneumatic conveying system (not shown). Unloading device

0

5 0 5 d

five

11 is connected to the conical part of the housing 1, and in its side surface there are holes 12 for air leaks.

The separator works as follows.

The raw material containing asbestos fiber and rock particles, through the loading device 9, enters the rotating disk 4, from which, due to the centrifugal force and inertial force, the particles are dropped and hit the cylindrical part of the separation surface 6. The velocity of the particles decreases and they are along the conical part of the separation the surfaces 6 in the form of a fan (when falling from the conical part, the material is deflated) roll down. At the same time, light particles with a lower soaring speed - asbestos fiber and small rock particles - are picked up by the air flow and carried into the interscapular space of the separating working device 2. Air movement in the separator is created by sucking the air through the discharge device 10 of the light fraction (fiber) connected with pneumatic system. Larger rock particles with greater inertial force and higher soaring speed, rolling down from the conical part of the separation surface 6, fall on the side surface of the inverted cone 7 and move along it to the discharge device 11. The isolated light fraction containing the main mass of asbestos fiber and small , the rock particles are divided in the space (channels) between the blades 3 of the separating organ 2 in the field of opposite direction of the forces - centrifugal and aerodynamic. The centrifugal force arises when the separating body 2 rotates, and the aerodynamic force is created by an inducer of air flow in the separator. Under the influence of these opposing forces, small rock particles are separated from the asbestos fiber by weakening the mechanical connection between them. The blades 3 rock particles are thrown against the wall of the cylindrical part of the housing 1 into the gap 5 beyond the separation surface 6, their movement is slowed down by the guide ribs 8 and they move along the ribs to the conical part of the separator and further to the discharge device 11 without mixing with the flow of the source material. Placing the separating surface 6 so that its upper boundary is at the level of the base of the separating body 2, excludes ingress of rock particles separated in its interscapular space into the flow of the source material in the area of the spreading disc 4. Performing the separating surface 6 of a cylinder-conical shape contributes to the formation of a stream of material in the form of a fan when it comes down from its conical part, which provides for a more efficient separation of heavy fraction particles (large rock particles) and facilitates blowing in With air flow material. The installation of an inverted cone 7 prevents the ingress and accumulation of material in the rarefaction zone in the center of the conical part of the separator, and ensures continuous unloading of the rock particles emitted at the exit from the spreading dis, 5, 5, 5

Separator without internal cone

Original

Concentrate

Tails

Original

Concentrate

Tails

Original

Concentrate

100

91.0

9.0

100

90.0

10.0

100

95.0

60, 65, 12, 55, 60, 12, 46, 48,

0

five

ka 4. When changing the composition of the material being processed, to ensure effective separation, the gap between the conical part of the housing 1 and the inverted cone 7 is changed by axial movement.

In order to determine the technological parameters of the separator operation, the proposed separator was tested without and with a cone. The test results are shown in the table,

As can be seen from the table, when testing a separator without an internal cone (experiments 1-3), the fiber content in the tails is 12-13%, which leads to the loss of the useful component.

Claims (1)

Invention Formula A centrifugal countercurrent separator, including a cylindrical housing with loading and unloading devices, a working separation body with a spreading disk fixedly fixed in its lower part, mounted for rotation around a vertical axis, a separating surface installed with a gap concentricum to the body, characterized in that , in order to increase the separation efficiency by eliminating mixing the starting material with the separation products, the separator is equipped with a cone, with the base upwards inside the body and coaxially under the spreading disc, the separation surface is cylindrical and its upper edge and lower edge of the separating body are flush. 60.4 65.2 12.4 55.5 60.3 12.4 46.6 48.3 98.2 97.8 98.5 Tails 5,013,9 Separator work with an internal cone 0.5 Original 10053.8 Concentrate95,056,6 99,9 Tails5.0 0.5 Original 10062,7 Concentrate 95,066,6 100,0 Tails5,00,5 0.5 Original 10057,0 Concentrate 95,060,0 100,0 Tails5.0