SU1401017A1 - Apparatus for flotation treatment of waste water - Google Patents

Abstract

The invention relates to a device for the treatment of wastewater from oils and sludge by flotation and improves the performance of the device. The device comprises a cylindrical housing open at the top (k) 1 with a conical bottom 2, inside of which a cylindrical shell 5 with flow windows 6 in the lower part is coaxially mounted. K 1 is attached to an overflow tray 8 for purified water, and to shell 5 is a foam receiver (R) 9. Sewage water and air are fed tangentially through the nozzle 15 into the shell 5, forming a circular flow from which particles are released under the influence of air bubbles oil, form a foam. K 9 adjoins a radial spiral partition 17. floating on the surface of the water, hinged at one end on the side 5 with the formation of zosh .. concentration and providing foam removal at P 9 by means of nozzles 20. Nozzles 20 are installed on the outlet side of the partition 17 and are directed to the fan P 9 from one end to the other. In the lower part, the partition 17 is made with a cut-out 21 for the passage of foam-free water. 2 Il. § (L

Description

The invention relates to a device for cleaning waste water and oil from sludge by the flotation method and can be found in the chemical, coking and other industries in the food industry.

The purpose of the invention is to increase the productivity of the device.

Fig, 1 shows a device, a longitudinal section; FIG. 2 is a view A of FIG. ,

A device for the flotation treatment of wastewater contains an open-top tank with a cylindrical housing 1 with a conical bottom 2, and a fitting 4 for collecting and removing sludge. A cylindrical shell 5 is installed inside the body 1 of the coaxial, the upper part of which protrudes above the body 1, preventing overflow of untreated water, in the lower one supported on the bottom 2 there are made razretye windows. 6. Shell 5 is fixed in housing 1 with a gap between their walls S forming an annular output chamber 7, to which c) an overflow tray 8 adjoins the cleaned tank to drain cleaned glass

The shell 9 is adjacent to the foam receiver 9 with overflow bar 10, above which air nozzles t1 dd are installed. The bottom 12 of the foam collector 9 is inclined towards the outlet funnel 13, above which the nozzle 14 is installed to quench the foam.

The internal cavity of the shell 5 is a receiving chamber 15, in which the nozzles 16 are tangentially mounted to supply the water and air to be purified.

To foam-receiving: Iku 9, p. reception 15. At the same time, between the receiver 9 and the partition 17, an area 19 of concentration and removal of foam is formed, as close as possible to the receiver 9.

For uniform removal of foam from the surface of the bulkhead on the partition 17, fan-shaped coiina 2oOj were installed.

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five

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five

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five

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towards the receiver 9 and placed with a uniform spacing along its length. In the lower part of the partition 17, a notch 21 is filled under the nozzles 20 for the passage of oil from the foam. To remove the foam receiver Jrf3 9

The device works as follows

The water to be purified, under pressure B, is supplied to the receiving chamber 15 through the nozzles 16, Tangentially discharging jets of water and air create in the water; Small air bubbles, away-. emulsified parts 1 of oils are drawn from the water and carried onto the surface of the rotating stream with the formation of a layer of oil peck, which rotates together with liquid. The upper part of the stream, the rear; a stanchion 17, is directed towards the foam receiver 9, and the flow of water, cleaned from foam, through the notch 2; in the partition 17 continues further, striking in a circle. At the same time, the installation of a spiral partition and the direction of its turn, the diver driving toward the side of the bridge reduces the flow area between the partition and the shell 5, helping to accelerate the movement of the node with foam 5 and thus, the concentration of foam in the zone 19 of the foam removal. The oil on the pitch, which is retained by the partition 17 at the overflow punch 10, is completely removed from the entire surface of the zone 19 under the action of the air jets 20 emerging from the nozzles and through the overflow bar 10 is taken by the foam receiver 9,

Foam thanks to sloping bottom

foam receiver

Q

and under the influence of the exit

air streams from the nozzles 1 1 rush to the funnel 13, where it is extinguished by jets of water from the nozzle 14 and removed through the nozzle 22.

Suspended hard particles due to centripetal forces are collected in primus 3, from where they are periodically removed through the nozzle 4. The clarified water through the overflow windows 6 enters the exit chamber 7 and is passed into the tray 8, and is removed from it through the nozzle.

Technical appraisal and economic advantages of the device prior to the device compared with the well-known po-ka tea

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Claims (1)

Claim A device for flotation wastewater treatment, comprising a housing with a conical bottom, a cylindrical shell coaxially mounted inside the housing forming a receiving chamber, an annular tray for draining clean water, a semi-submersible guide spiral partition and a foam receiver, so that, in order to increase the productivity of the device, it is equipped with nozzles for supplying water and air tangentially mounted in the receiving chamber, a float and nozzles for supplying air, evenly and fan-shaped placed on the outlet the side of the spiral partition and the directed outlet openings towards the foam receiver, 'while the spiral partition is pivotally mounted on the side and the other on a float with a cutout at the bottom with one end j and made distinctive Tehred M. Khodanich