RU1783995C - Hydrocyclone - Google Patents

Abstract

Usage: in the mining, metallurgical, chemical and pulp and paper industry. SUBSTANCE: in a hydrocyclone containing a cylinder-conical body with a tangential inlet pipe 5, a Sand pipe 6 and a drain pipe 7, the length of which is equal to the height of the cylindrical part of the body, a cut-off 8 is provided having an outer surface made of a conical and conjugated by two surfaces having second order curve generators. By segments of the curves of the second order, the cutter is interfaced with the end cover 4 and the edge of the hole 9 of the drain pipe 7. 2 ill. cl with VI 00 s o about cl with Fig. 1

Description

The invention relates to the field of mineral processing and can be used in the mining, metallurgical chemical and pulp and paper industries.

A hydrocyclone is known, including a cylinder-conical housing with connecting flanges, a tangential nozzle for supplying the initial suspension, a sand nozzle and a drain nozzle, a length equal to the height of the cylindrical part of the housing, a cutter located on the outer surface of the drain nozzle, mating with the edge of the hole of the drain nozzle and the contact edge of the end pipe covers with a cylindrical part of the housing and located directly above the inlet of the tangential pipe (1).

The aim of the invention is to increase the degree of extraction of light fractions from the suspension by providing directional movement of the flow of the initial suspension in the section of the housing from the inlet of the tangential pipe to the hole in the drain pipe.

The invention is illustrated by a drawing, in which Fig. 1 shows a general view of a hydrocyclone, Fig. 2 is a section along AA in Fig. 1.

The hydrocyclone comprises a housing made of sections of cylindrical 1 and conical 2 shapes with connecting flanges 3 and an end cover 4, a tangential pipe 5 for supplying the initial suspension, a sand pipe 6, a drain pipe 7 and a cutter 8.

The outer surface of the cutter 8 is conical and provided with two surfaces having second-order curve generators.

One surface of the second-order curve is mated to the edge of the opening 9 of the drain pipe 7. The second surface of the second-order curve is mated along the edge of the end cap 4 with the cylindrical section 1 directly above the inlet of the tangential pipe 5.

The hydrocyclone works as follows.

The initial suspension under pressure enters the cylindrical part 1 of the housing through the tangential pipe 5, acquiring a rotational movement. In the resulting centrifugal field, the heaviest particles are thrown towards the walls of the body and spiral downward, where they are discharged through the sand pipe 6. Light particles under the action of radial forces move along trajectories close to the central axis of the hydrocyclone, where they are picked up by the internal upward flow. moving towards the discharge pipe 7. Together with the upward flow, within which an air column forms, light particles are removed from the hydrocyclone through the drain pipe 7.

Due to this form of cutter 8, the volume filled with the suspension during the transition from the tangential nozzle 5 to the cylindrical part 1 of the housing increases gradually, due to which the pressure drop in the flow is reduced and smoothed out and turbulence is reduced.

In addition, in the section from the inlet of the tangential pipe 5 to the hole in the drain pipe 7, the suspension flow acquires directional movement in the cramped space of the cylindrical

section 1 of the hydrocyclone body, limited by the profile of the cutter 8. This eliminates the zone of flow swirls under the end cap 4 and around the drain pipe 7.

All this leads to the fact that the trajectories of light particles to the drain pipe 7 in this part of the housing become more stable, the probability of entrainment of light fractions with a heavy product is reduced

into the sand pipe 6. The process of separating the suspension by density in the cylindrical part 1 of the hydrocyclone body is stabilized.

Elimination of vortices around the discharge pipe 7 and ordering the movement of the suspension flow in the cylindrical part 1 of the hydrocyclone ensures the shape of the air column and the internal upward flow of light fractions on approach to the opening of the drain pipe 7, which also creates favorable conditions for the maximum extraction of light particles into the drain .

Thus, by providing directional movement of the flow of the initial suspension in the area from the inlet of the tangential pipe 5 to the hole in the drain pipe 7 using the cutter 8, the conditions for the separation of particles are improved

suspension in density and increases the recovery of light fractions.

The positive effect of the claimed design can be obtained, for example, in concentration enrichment, when

the useful component is represented by light fractions; in this case, an increase in the recovery of the useful product and a reduction in its losses are achieved, which is especially important in order to save resources.

Claims (1)

SUMMARY OF THE INVENTION A hydrocyclone comprising a cylindrical conical body with connecting flanges, a tangential nozzle for supplying an initial suspension, a sand nozzle and a drain nozzle, equal in length to the height of the cylindrical part of the housing, a cutter located on the outer surface of the drain nozzle, mating with the edge of the drain nozzle opening and with the contact edge of the end cover with the cylindrical part of the housing and located directly above the input the opening of the tangential nozzle, o t - characterized in that, in order to increase the degree of extraction of light fractions by providing directional movement the flow of the initial suspension in the housing section from the inlet of the tangential pipe to the hole in the drain pipe, the outer surface of the cutter is made conical, conjugate two surfaces having a second-order curve, with an end cap and an edge of the hole of the drain pipe FIG. 2