SU435009A1 - PNEUMATIC CLASSIFIER - Google Patents

Description

one

The invention may find -application in the building materials industry, mining, chemical and other industries of the national economy.

Pneumatic classifiers are known, including a vertical, in the form of a vertical zigzag channel, a separation chamber, a loading nozzle, and a nozzle outlet for a slurry with a thin product.

The purpose of the invention is to increase the efficiency of the work.

This is achieved by the fact that the separation chamber is made with an annular cross-section formed by conical outer and inner sections, and a distribution device is coaxially installed inside it.

The distribution device can be made both in the form of a cone, and in the form of a disk associated with the drive.

FIG. 1 shows a classifier with a cone distributor, vertical section; in fig. 2 shows a classifier with a disk distributor connected to the drive, a vertical section.

The classifier consists of a body formed of a series of classifying sections 1, each of which contains a pair of truncated cones 2 and 3, a pipe 4 for loading the source material, a diffusing cone 5 and a conical-cylindrical nozzle 6 for outputting a thin product.

The option of execution with a rotating scattering disk contains instead of a cone 5

the disk 7 and its drive 8. The number of classifying sections 1, located above and below the end of the loading tube 4, is set depending on the required separation accuracy.

The pneumatic classifier operates in the following sequence.

The source material is supplied with a pressurized feeder to pipe 4, through which by gravity

enters the cone 5 or disk 7, with which it is evenly distributed over the cross-sectional area of the separation zone of the first classifying section. The air flow passes through the zigzag channel from the bottom up, produces the separation of particles moving towards it material. Fine particles, the sedimentation rate of which is less than the speed of the air flow, are entrained by it upward, while the larger ones move downward.

During the movement of both products, they are sequentially cleaned up in each classification section. Thin particle aerosol

from the classifier through pipe 6 and is cleaned of solid particles in known cleaning devices.

The large product is discharged from the lower classifying section. The air flow is created by an external fan.

Subject invention

Claims (3)

I. Pneumatic classifier, which includes a vertical zigzag channel in the form of a separation chamber, a loading nozzle and a thin mixture aero mix outlet pipe, characterized in that the separation chamber is designed with an annular cross-section formed by conical external and internal sections, and within it a switchgear is co-located. 2. Classifier according to claim 1, characterized in that the distribution device is made in the form of a cone. 3. Classifier according to claim 1, characterized in that the switchgear is made in the form of a disk associated with the drive.