SU971469A1 - Hydrocyclone - Google Patents

Description

(5) HYDROCYCLONE

one

The invention relates to the enrichment of minerals, namely the separation of materials by size and density in a centrifugal field, and can be used in mining, ore preparation enterprises and in construction.

The hydrocyclone is known, which includes a cylindrical body, a tangential .i supply and discharge nozzle, a sand nozzle l.

The disadvantage of such a hydrocyclone is the imperfect structure of the suspension flow in the discharge nozzle, which reduces the separation efficiency.

The closest to the proposed hydrocyclone by technical essence and the achieved effect is a hydrocyclone that includes a cylinder-conical case, a spiral supply and drain pipe, a sand nozzle j 2j.

The disadvantage of this hydrocyclone is that in its cylindrical part there is an inefficient cleaning of separation products. This is due to the relatively small gradient of the tangential velocity along the cross section of the annular channel between the walls of the vortex chamber and the drain pipe. At the same time, the greatest separation efficiency in the cylindrical part of the apparatus corresponds to the diagram of tangential velocities with the maximum value at the drain pipe and with the minimum value at the wall of the vortex chamber. In addition, the small gradient of the tangential velocity over the cross section of the annular channel contributes to the formation of a conglomerate of particles of the starting material due to the presence of zones of reduced turbulence. These factors reduce the perturbation of the dispersed 20 streams and significantly reduce the separation efficiency.

Claims (2)

The purpose of the invention is to reduce the size of the drain and improve the accuracy of separation. 39 This goal is achieved by the fact that the drainage pipe is provided with dampers located on its outer surface, made in the form of curvilinear profiles of variable cross section, whose convex surface is facing the cylindrical part of the hydrocyclone body. FIG. 1 shows a general view of a hydrocyclone; figure 2 - section aa in figure 1. The hydrocyclone contains a cylindrical housing 1, a spiral supply nozzle 2, as well as a drain nozzle 3 for clarified liquids with extinguishing dampers 4 installed on it, and a sand nozzle 5 for withdrawing the condensed product. Hydrocyclone works as follows. The original pulp, flowing in a spiral through the supply nozzle 2 into the hydrocyclone body, forms a swirling flow directed along a spiral line from top to bottom, which, when it moves in the cylindrical part of the apparatus, receives periodic disturbance from the strikers. This contributes to more efficient cleaning of the material in the annular channel due to the creation of zones of increased turbulence, pressure drops and speed. Under the action of centrifugal force, relatively large and heavy solid particles are thrown 9 to the wall of the hydrocyclone and then t loaded through the sand nozzle, and the thinnest and lightest particles are carried with the clarified liquid through the discharge nozzle. will improve the efficiency of classification for and reduce the loss of large classes with plums. Claims of the invention Hydrocyclone, including a cylindrical housing, a spiral feed and drain nozzle, a sand nozzle, characterized in that, in order to improve the separation accuracy, the drain nozzle is provided with baffle plates located on its outer surface, made in the form of curvilinear profiles of variable cross section, with a convex surface facing to the cylindrical part of the hydrocyclone body. .Sources of information taken into account in the examination 1, Olevsky V.A. Design and calculation of mechanical classifiers and hydrocyclones. M., Gosgortekhizdat, I960. 2.Povarov A.M. Hydrocyclones at the processing plants. M., Nedra, 1978, p.189, p.20-21 (prototype).