SU1237256A1 - Hydrocyclone for separating silt mixture - Google Patents

Description

one

The invention relates to a technique for the separation of inhomogeneous liquid media, namely, centrifugal type devices, and can be used in domestic and wastewater treatment plants during sludge treatment.

The aim of the invention is to increase the separation efficiency of the sludge mixture.

The drawing shows a hydrocyclone, a general view.

The hydrocyclone includes a housing 1 with a tangential inlet nozzle 2, a drain 3 and a sludge 4 nozzle, a chamber 5 with a nozzle 6 for supplying dispersed gas, an annular filter plate 7, a separating chamber 5 from the upper cylindrical part of the housing 1.

The hydrocyclone operates as follows in a hydrocyclone.

at once.

The original sludge mixture is fed under pressure through an inlet tangential nozzle 2 c. case 1, acquiring a rotational movement under the action of centrifugal inertia force, the decaying (old) sludge, having a greater density, is thrown to the wall of case 1 and moves downward to the sludge nozzle 4 along a spiral trajectory, from where it is diverted to further processing .. The young sludge moves in the internal ascending spiral flow towards the discharge nozzle 3, through which it flows out of the hydrocyclone. At the same time, compressed gas (air) is supplied to chamber 5 through pipe 6, which, having passed through the annular filter plate 7, enters the cylindrical part of housing 1 in the form of small puffs. Gas (air) bubbles are mainly trapped on the flocculants of biologically active sludge as looser structure and with greater hydrophobicity compared to floccules of burning sludge, more

Editor M. Bandura Order 3223/9

Compiled by L.Tsyganov

Tehred L. Serdyukova Proofreader M. Maksimishinets

Circulation. VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5

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Production and printing company, Uzhgorod, Projecto st., 4

five

mineralized and containing an admixture of sand. As a result, the density of the complex of biologically active sludge with gas (air) bubbles decreases and the density difference between biologically active and dying sludge increases, thereby increasing the relative effect of the rotating flow, which carries particles of biologically active sludge with gas (air) bubbles to the axial part of the hydrocyclone. where they are drawn into the upward flow and out through the nozzle 3, from the apparatus. The formation of a complex of biologically active sludge - bubbles of gas (air) reduces the effect of centrifugal forces on biologically active sludge, throwing it towards

During the operation of hydroxy cyclones, the pressure inside the stream changes as a result of the rapid rotation of the fluid along the hydrocyclone radius, decreasing from the periphery to the center. In this connection, to obtain a uniform concentration of gas (air) bubbles, both in quantity and dispersion, the filter plate 7 with pores increasing in size from its center to the periphery must be made in the entire volume of the hydrocyclone working chamber.

Thus, the injection of compressed gas (air) through a filter plate with pores increasing in size from its center to the periphery, located above the cylindrical part of the hydro-tilt housing, improves the separation efficiency of the sludge mixture by increasing the axial component of the flow velocity in the cylindrical part the case of the hydrocyclone, excluding the possibility of stirring up the already separated sludge mixture and at the walls of the apparatus with a uniform saturation of the sludge mixture with gas (air) bubbles with bubbles.

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Claims (2)

1. HYDROCYCLON FOR SEPARATION OF THE SILT MIXTURE, comprising a housing with a tangential inlet pipe, drain and sludge pipes, a chamber with a pipe for supplying compressed gas, characterized in that, in order to increase the separation efficiency, it is equipped with an annular filter plate installed in the chamber for supplying compressed gas located above the cylindrical part of the hydrocyclone. 2. The hydrocyclone according to claim 1, characterized in that the annular filter plate has pores that increase in size from its center to the periphery. from SU .. „1237256