SU1551435A1 - Centrifugal classifier - Google Patents

Abstract

This invention relates to the sizing of sticky powdery materials. The purpose of the invention is to improve the reliability and performance in the separation of sticky materials. The classifier consists of a cylindrical housing 1 with connections for supplying 2 raw materials and a drain of 3 thin products. In the lower part of the housing 1 is placed in heat 4 output of a large product. With a radial clearance of 8 with respect to the housing, a twisting device is installed, consisting of an outer 5 and an inner 6 shells with vanes 7. Above the twisting apparatus with a radial gap 10 relative to the sheath 6, there is a conical cover 9. With the shells 5 and 6, the upper edges forming distribution device spiral-shaped boxes 12. Their lower edges are connected to the nozzle 2. The source material is fed through the nozzle 2, is distributed along the ducts 12, twists on the blades 7 and enters the separation zone 11, located between the lid 9 and the housing 1. Fine particles are discharged through the nozzle 3, large particles are poured into the gaps 8 and 10, and then discharged through the chute 4. 2 Il.

Description

The invention relates to devices for the separation of bulk materials, namely {to centrifugal classifiers, and can be used in the construction, chemical, mining and other industries.

The purpose of the invention is to improve the reliability and performance of the centrifugal classifier in the separation of sticky materials.

Figure 1 schematically shows a centrifugal classifier, a longitudinal section; figure 2 - section aa in figure 1.

The centrifugal classifier consists of a cylindrical conical body 1 with the 2 branch pipes of the source material and the outlet 3 inserted into it, a thin product connected to the body in the lower part of the estrus 4 of a large product of the swirling apparatus consisting of 5 outer and 6 inner shells with spaced between them vanes 7. The twisting device forms a radial clearance 8 with the housing 1, and with a conical cover 9 placed above it - a radial clearance 10. The axial clearance between the conical cover 9 and the housing 1 forms a centrifugal counterpropagation chnuyu zone 11 classification. The source material inlet 2 is connected to the twisting apparatus by spiral-shaped ducts 12 forming a distribution device.

Centrifugal classifier works as follows.

The source material together with the gas is fed through the pipe 2, is distributed through the ducts 12 p distributor

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device and transported to the twisting apparatus, twisted in the blades 7, placed between the shells 5 and 6 and enters the centrifugal countercurrent separation zone 11, located between the conical cover 9 and the housing 1. Under the influence of the prevailing forces of gas flow, the particles move to the axis and output together with the gas through the nozzle 3. Large particles under the action of the prevailing centrifugal inertia are concentrated at the periphery of the centrifugal countercurrent separation zone 11 and poured into gaps of 8 and 10 m forward the swirl unit and the housing 1 and the swirl unit and conical lid 9. When driving down a large product particles do not encounter the inclined surfaces and neobduvaemyh freely reach estrus larger product 4 housed in the lower housing part 1. i

Thus, due to the rational organization of flow parts in the centrifugal classifier, high reliability and performance are achieved in the separation of sticky materials.

Claims (1)

Invention Formula The centrifugal classifier, which includes a cylindrical conical case with nozzles for supplying the starting material and discharging a thin product, is placed in the lower part of the case and is injected with a large product, installed with a radial clearance relative to the case; the outer and inner shells and the blades placed between them, mounted above the twisting device with a radial clearance relative to the inner shell, is a cone-shaped lid and distribution device, characterized in that, in order to increase reliably, 5514356 in the classification of sticky materials, the distribution device is made in the form of spiral ducts, the upper edges of which are matched with the shells of the swirling apparatus, and the lower edges are connected to the nozzle supplying the source material. Fie.2