SU645704A1 - Hydraulic classifier - Google Patents

Description

I

This invention relates to a technique for the hydraulic classification of granular materials and can be used in industrial building materials.

A hydraulic classifier is known for separating gravel-sand mixtures, including a vertical casing, loading and unloading nozzles, a drain nozzle, which uses the principle of gravity separation in a vertical fluid flow (1).

The disadvantage of this classifier is low efficiency due to the significant clogging of the coarse fraction of fine particles.

The closest technical solution to the proposed one is a hydraulic classifier, including a vertical body, a tangentially mounted loading nozzle, a soil collector with a discharge nozzle, a drain nozzle and an auxiliary device to reduce the clogging of the gravel and small fraction 2.

A disadvantage of this device is also the ingestion of a large fraction of large particles, for the separation of which a subsequent processing of the material on another apparatus is required.

The purpose of the invention is to improve the classification efficiency by increasing the clarity of separation of particulate materials in a centrifugal field.

The goal is achieved by the fact that the auxiliary device is made in the form of a cylindrical conical chamber with a vertical slotted perforation along the generatrix in a cylindrical part, with a conical lid and a drainage nozzle in the center and syabzheno separator in the form of a conical disk with a stem having a possibility of vertical movement.

The drawing shows a hydraulic classifier.

The hydraulic classifier contains a crown 1, a soil collector 2 with a discharge pipe 3. An auxiliary device 4, made of cylindrical shape with a vertical slit perforation along the generatrix 5, is connected to the soil digger 2 and is closed by a conical cover 6 with a central drain hole, where the connector 7 is inserted. .--- -.

Tangentially to the cylindrical part of the auxiliary device 4 is attached to the pipe 8 feed slurry. Above the auxiliary device 4 is a separator. 9 in the form of a conical disk, attached vertically to a vertical rod 10, which is capable of vertical movement with the aid of any drive. Above the separator 9, a pipe 11 for supplying water is tangentially attached to the wall of the classified chamber, and a drain pipe 13 is built into the chamber cover 12. A tangential pipe 14 is installed in the lower part of the housing 1 above the primer collection box.

Classifier works as follows.

The initial mixture, including various fractions of the granular material, flows through the nozzle 8 under pressure into the auxiliary device 4. Under the action of centrifugal forces, the solid particles are pressed against the cylindrical part 5, with the fine grains passing through the vertical slit perforation and the large particles. slide along the walls of the auxiliary device 4 into the soil collector 2. Some of the small grains trapped in the funnel are captured by the upward vortex and enter through the pipe 7 into the space between the cover 6 and the separator 9 into the housing 1. By moving the separator 9, the flow rate is adjusted and redistributed. passing through the holes of the cylindrical part 5 of the device and the annular channel between the separator 9 and the lid 6 when changing the parameters of the original slurry stream. Through the tangential nozzle 11, water enters the housing 1, which causes the hydraulic fluid in it to rotate. Larger particles are pressed against the walls of the housing 1, lowered into its lower part and discharged through the pipe 14. The smallest particles are captured by the vertical flow and output through the drain pipe 13. Thanks to the two-stage separation process and a combination of gravity effects, the hydraulic classifier ensures high separation accuracy at relatively small size and additional consumption;

water

The boundary grain in the first separation stage is determined by the size of the perforation holes of the auxiliary device 4, and in the second stage by the corresponding mode of fluid flow in the housing 1, which is regulated within the wide range of changes in additional water consumption and discharge through the pipes 7 and 13.

Using the hydraulic classifier, three fractions can be obtained. granular material, which in many cases is achieved by no less than two devices.

Claims (2)

Invention Formula A hydraulic classifier comprising a vertical body, a tangentially mounted loading nozzle, a soil collector with a discharge nozzle, a drain nozzle, and an auxiliary device for reducing gravel contamination and fine fractions, in order to increase the efficiency of classification by increasing the clarity of separation of granular materials in the centrifugal field , the auxiliary device is made in the form of a cylindrical chamber with a vertical slit-like perforation along the a cylindrical part, with a conical lid and a drain pipe in the center and provided with a separator in the form of a conical disk with a stem, having the possibility of vertical movement. Sources of information taken into account in the examination 1. USSR author's certificate No. 227222, cl. B 03 B 5/62, 1966. 2. USSR author's certificate No. 255875, cl. B 03 B 5/62, 1968. yy