CZ288392B6 - Separator for dispersion flow separation of pulverized materials - Google Patents

Abstract

Pulverized material is separated by the action of a spiral turbulent stream of air that exhibits velocity axial component acting in the vortex external area against gravity direction and in the vortex internal area accordant with gravity direction. The invented separator consists of a rotor (1) having in its lower section a hole (3) and along its circumference blades (2), further a spreading disk (6) a fixed casing with material inlet (5), a hopper (9) air exhaust (11) and product discharge (16), whereby separation air spiral inlet (10) being situated underneath the rotor (1) level passes in upward direction away into a lower conical section (12) up to the rotor (1) bottom part level and above said conical section (12) there is performed an upper conical section (13) passing away into a cylindrical section (7) terminated by a cover (8), while the separation air spiral inlet (10) passes in downward direction into the hopper (9).

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a sorter for dispersed wind sorting of powdered materials in a rotary vortex field.

BACKGROUND OF THE INVENTION

A wide range of sorting equipment is used to carry out sharp screening of powdered materials, which are structurally complex and difficult to operate and maintain. For example, EP 0 023 320 B1 whose screening device is configured such that the feed material forms an orifice in the device that is laterally blown through the screening air stream. A disadvantage of this solution is that the sharpness of the screening deteriorates when the screening threshold is increased to values above 100 microns, which results in an increased proportion of misclassified fine particles in the coarse product, which is undesirable. Also the consumption of sorting air is disproportionate to the achieved separation of fine and coarse product.

SUMMARY OF THE INVENTION

[0008] The object of the present invention is to provide a device in which the directional spatial flow of the sorting air is achieved by the geometrical arrangement of the sorting space, so that the spiral inlet of the sorting air is located below the rotor level. level of the lower part of the rotor, where it ends and above it is formed an upper conical part, which above the level of the rotor passes into the cylindrical part terminated by the lid, with the downstream spiral inlet passing into the hopper.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in more detail with the aid of the drawing, in which FIG. 1 shows schematically the geometrical arrangement of the sorter;

DETAILED DESCRIPTION OF THE INVENTION

The sorter for the dispersed wind sorting of powdered materials in a rotary vortex field consists of a vertically rotatable rotor 1 provided with a scattering plate 6 at the top, an opening 3 at the bottom and blades 2 parallel to the axis of rotation circumferentially. part 7, upper conical part 13, lower conical part 12, spiral inlet 10 with vertical guide vanes 4, material inlet 5, hopper 9 and screening air outlet 11 adjacent to the outlet 3 of rotor L

The sorter according to the invention works as follows:

The screening air is supplied by the spiral inlet 10, proceeding while rotating upwardly along the lower conical portion 12 into the upper conical portion 13, from where it proceeds radially downwardly to the rotor 1, from where it exits through the aperture 3 and is discharged via the exhaust 11.

The material to be screened is fed by material feed 5 onto the spreading discs 6, from where it is sprayed to the cylindrical portion 7 and progresses downward into the screening space 17 where it is subjected to the screening air stream. Particles smaller than the set sorting limit are carried to the rotor 1 and discharged as a fine product together with the sorting air via the exhaust air 11. The coarsest particles are

The centrifugal effect of the vortex stream is thrust against the walls of the upper conical portion 13, from where they proceed downwardly against the upward flow of the sorting air 14 along the lower conical portion 12 and the vertical guide vanes 4 of the spiral inlet of the sorting air 10 up to the hopper 9. sorting and washing the particles with sorting air. The other particles 5 greater than the set sorting limit, which penetrate near the blades of the rotor 2, are rapidly discharged downward through the downstream component 15 to the hopper 9, from where they are discharged together with the coarser particles through the discharge 16 as a coarse product.

Claims (1)

PATENT CLAIMS 15 1. A sorter for dispersive wind sorting of powdered materials consisting of a rotor at the bottom of which is an opening and circumferential blade, scattering plate, singing sleeve with material inlet, hopper, air outlet and product outlet, characterized in that ) is located below the level of the rotor (1), passes upwards in the lower conical portion (12) to the level of the lower portion of the rotor (1), where it ends and above it is formed the upper 20 conical portion (13) 1) passes into a cylindrical part (7) terminated by a lid (8), the downstream inlet spiral inlet (10) passing into the hopper (9).