SU1736561A1 - Device for cleaning liquids - Google Patents

Abstract

The invention relates to a device for cleaning liquids and allows for the regeneration of the filtering membrane and to reduce fluid loss when discharging the separated sludge. The device consists of a body with an equidistant rotor installed in it, made in the form of two hollow perforated truncated cones connected to each other by bases and tops with a hollow shaft, while the filter membrane is placed on the conical surfaces of the rotor, the body is equipped with an annular slush thickener with a tangential slurry pipe with a porn control valve and annular nozzles for the original fluid. 2 yl

Description

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The invention relates to filtration, in particular to devices for separating suspensions, and can be used in the chemical, processing and industrial enterprises and in the complexes of sewage treatment plants of various industries.

The known design of a hydrocyclone is made in the form of a cylindrical body, inside of which a rotating hollow shaft is placed, equipped with cylindrical-conical nozzles.

The disadvantages of this device are the low fineness of cleaning of working fluids due to the weak effect of centrifugal forces on mechanical impurities of small hydraulic size, as well as a change in the quality of cleaning in a wide range depending on the sedimentation properties of mechanical impurities, i.e. the instability of the device that

due to the geometrical relationships of the hydrocyclone design.

Closest to the present invention is a device for cleaning liquids, comprising a housing in which a rotating hollow perforated rotor with a filter element, nozzles for introducing a liquid and withdrawing a filtrate are mounted on bearings.

The disadvantage of the device is the long-term presence of mechanical impurities above the filtering surface, which increases the likelihood of contamination of the latter.

The aim of the invention is to ensure the regeneration of the filtering membrane and the reduction of fluid loss when unloading the separated sludge.

This goal is achieved by that the rotor with a filter membrane attached to it is made in the form of two hollow perforated truncated cones.

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connected to the base between themselves and tops with a hollow shaft, the cylinder-conical device body is made centrally to the rotor and equipped with two annular nozzles to supply the source liquid to the tops of the conical filtering surfaces of the rotor and an annular sludge concentrator with a tangential slurry pipe in which it is installed - control valve.

These features of the proposed design of a device for cleaning liquids provide regeneration of the filtering membrane and reduce fluid loss when unloading the separated sludge.

Fig. 1 shows a device for cleaning liquids, a general view: Fig. 2 shows a section A-A in Fig. 1.

The device contains a cylindrical detachable body 1 (FIG. 1) with nozzles 2 and annular nozzles 3 for the initial liquid, an annular slush thickener 4 with a tangential slurry nozzle 5 (FIG. 2), a cover 6 with a filtrate nozzle. In the housing 1 on bearings 8, a rotor 11 driven by an electric motor 9 by means of a V-belt transmission 10, made of two hollow perforated truncated cones 12 and a hollow shaft 13, is mounted. filtrate cavity 16. In the tangential slurry pipe 5, a shut-off valve 17 is installed (figure 2).

The device works as follows.

The liquid to be cleaned through the nozzles 2 is fed under pressure into the annular nozzles 3 and further into the cylindrical housing 1. From the nozzles 3 a stream flows evenly distributed around the perimeter of the tips of the cones 12 and directed tangentially to the filtering membrane 14. Under the action of the rotor 11 driven by the motor 9, the fluid being cleaned acquires a rotational-translational motion directed from the vertices of the cones 12 to the annular slurry damper 4. In the gap between the inner surface of the housing 1 and the outer surface of the rotor 11 vodits centrifugation initial liquid. In this case, large particles of mechanical impurities under the action of centrifugal forces are thrown against the wall of the housing 1 and removed from the centrifugation zone 15 to the slurry thickener 4 and further through the tangential slurry pipe 5 with a shut-off valve 17. tunable to a certain filtration mode, sent to recycling. Most clean flow centrifuged

the fluid adjacent to the membrane 14 moves along the surface of the membrane 14, is filtered through it and removed from the cavity of the filtrate 16 through the hollow shaft 13 and further through the cavity of the cover 6 and the pipe 7 to the consumer. The shut-off and control valve 17 periodically discharges the thickened sludge, opening when the pressure in the housing 1 determined for a given filtration mode is reached.

5 and closed at a decrease in pressure after discharge. The pressure pulsation in the housing 1 causes a reverse flow through the membrane 14 from the filtrate side at the moment of depressurization; the filtering surface regenerates. Particles depart from the membrane, are picked up by a fluid flow and output to the sludge thickener 4. The conical shape of the filtering surface also contributes to the regeneration of the membrane 4. The settled particles, moving towards the surface with a large radius of rotation, fall into the zone of action of large centrifugal forces. under the action of which they are thrown against the wall of the housing 1 and

0 is brought into the sludge thickener 4. In the sludge thickener 4 there is an increase in the concentration of mechanical impurities, which, in addition to discrete discharge through the valve 17, reduces fluid loss during discharge

5 of the sludge, its percentage is reduced in the composition of the sludge being discharged.

Use in a device for cleaning liquids of a rotor made in the form of two hollow cones connected by bases between themselves and tops with a hollow shaft, body concentric to the rotor, with annular nozzles for supplying the initial liquid, an annular sludge concentrator, a tangential slurry pit5, the shut-off and control valve prevents the filter membrane from being contaminated, creating the most favorable flow-through filtration mode, provides for the regeneration of the filtering membrane

0 membrane, reduces fluid loss when unloading the selected sludge.

Claims (1)

Apparatus of the Invention A device for cleaning liquids, comprising a housing with an inlet pipe 5 and the filtrate and sludge outlet nozzles, a rotating hollow perforated rotor with a filter membrane, connected with an electric drive shaft, characterized in that, in order to ensure the regeneration of the filter membrane and reduction of fluid losses during discharge of the separated sludge, the rotor is made in the form of two hollow perforated truncated cones connected by bases to each other and tops with a hollow shaft, the membrane is mounted on conical sections 10 7 the rotor surfaces, while the housing is made equivalent to the rotor and provided with an annular slush-thickener with a tangential slurry pipe, equipped with a shut-off valve, and annular nozzles for the original liquid. fi.g.1 12 thoroughness