SU1608129A1 - ")apparatus for flotation treating of waste water - Google Patents

Abstract

The invention relates to a device for the purification of waste water from oils and sludge by the method of flotation and reduces energy consumption. The device comprises a cylindrical body 1 / K / with a conical bottom 2, open at the top. Inside K1 there is a cylindrical shell 5 with overflow windows 6 in the lower part, forming receiving chamber 9 / PC /. Inside PC 9 a collector 22 is installed for supplying water and air to the flotation. A foam receiver 11 is installed across PC 9 with nozzles for extinguishing foam. Coaxially with respect to PC 9, an annular partition 10 is installed to form a gap with the shell, in which water is supplied through a nozzle 13 tangentially installed in it, which forms a moving circular flow. In the gap there are floats 17 interconnected with the ends of the paddle 19 / G /, hinged at the center of the PC 9. Under the action of the floats 17 moving on the surface of the water flow in the annular gap, the G 19 moves with elastic blades to scoop the foam into the foam receiver 11, where she goes out. Suspended solids are collected in intake 3, from where they are periodically removed. Purified water through the overflow windows 6 and the exit chamber 7 enters the overflow tray 8. 3 Il.

Description

1+ Figure 1

11 with nozzles for the redemption of hemp coaxially relative to PC 9, an annular partition 10 is formed with a gap formed with a shell in which the water forming a moving circular flow is fed through the tangentially installed nozzles 13 in it. In the gap there are floats 17 interconnected with the ends of the paddle 19 (g) hinged at the center of the PC 9. Under the action of the floats 17 moving on the surface of the water flow in the annular gap the floats 17 move with elastic blades to scoop the foam into the foam receiver 11, where it is repaid. Suspended solids are collected in intake 3, from where they are periodically removed. Purified water through the overflow windows 6 and the exit chamber 7

enters the overflow tray 8. 3 silt,

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The invention relates to wastewater treatment plants for sludge oils by flotation and may be used in the chemical, coking and other industries.

The purpose of the invention is to reduce energy 7S

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FIG. 1 shows a device, a longitudinal section in FIG. 2 is the same, top view in FIG. 3; section A-A in FIG. 2

A device for flotation treatment of wastewater contains a cylindrical housing 1 with an open horse on top: a chesm bottom 2. It has a bottom 3 with a fitting 4 for collecting and separating sludge. A cylindrical shell 5 is installed coaxially inside the casing 1, the upper part of which protrudes above the casing 1, preventing overflow of untreated water, and re-Q windows are made in the lower one supported on the bottom 2. The shell 5 is installed in the housing 1 with a gap between them and their walls forming an annular outlet chamber 7, to which the overflow tray 8 closely adjoins the outlet 5 for the cleaned liquid. The inner cavity of the shell 5 forms the receiving chamber 9, in which the annular partition 10 is placed coaxially. The transverse of the receiving chamber 9 is placed JQ foam receiver 11 with the outlet funnel 12. The bottom of the foam receiver 11 is inclined towards the outlet funnel 12, above which is installed a nozzle 13 to foam foam , and nozzles 14 are installed above the foam receiver 11 for supplying air, contributing sozmestno with a sloping bottom of the re-receiver 11 to the flow of foam to the outlet funnel 12.

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In the annular gap 15, which is formed by an annular partition 10 and a shell 5, nozzles 16 are tangentially mounted to supply the water to be purified and to rotate its flow, and streamlined shape floats 17 are placed on the surface of the water. In the center of the receiving chamber 9 on the axis 18, the paddle 19 is pivotally mounted for rotation. It consists of two branches bent in the direction of movement, and its ends are interconnected with floats 17 placed in an annular gap 15 and provided with nozzles 20; directed ends towards the receiving chamber 9.

Separate elastic blades 21 are fixed on the lower edge of the pad 19 to reduce its resistance to movement. In order to prevent passage between the joints of the foam blades 21, they are overlapped with each other. At the bottom of the receiving chamber 9 a collector 22 is installed with nozzles 23 for supplying and evenly distributing water and air to the flotation. Fittings 24 and 25, respectively, are available to remove foam and purified water.

The device works as follows.

The water to be cleaned is supplied under pressure to the receiving chamber 9 through nozzles 16 and a collector 22. Water jets coming out of the nozzles 16 create in the annular gap 15 a rotating flow carrying benches 17. The latter, moving along the channel of the annular gap 15 transfer their movement to the stroke 19 interconnected with them. Puffs of air entering through the collector 22 into the receiving chamber 9 are carried along on top of 1

The water nodule emulsified oil particles to form a layer of oily foam. Moving the strokes 19, the foam is scooped into the foam receiver 11, which is further promoted by the jets coming out of the nozzles 20, and their speed is controlled by changing the flow rate of water through the nozzles 16. Under the action of the jets of air coming out of the nozzles 1A the foam receiver 11 rushes to the funnel 12, where it is extinguished by the water supplied from the nozzle 13 and is removed through the nozzle 24. Suspended solids are collected in the near 3, from which the periodicite is removed through the nozzle 4. The purified water 6 enters the outlet chamber 7, the overflow of the plenum 8 and is discharged through the nozzle 25,

Installing the annular partition coaxially relative to the receiving chamber to form an annular gap with the shell and placing nozzles for supplying water into it reduces the volume of rotationally driven water that allows floats to move and the stroke associated with it, reducing the resulting energy consumption. The hinge installation of the stroke ensures its free rotation under the action of the water moving in the annular gap, which also reduces the energy consumption of the foam. At the same time, the performance of the paddle with elastic blades and the combination of their overlap reduces the dragging of the paddle with water and when passing it over the foam-receiving

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NIKOM reduces losses in its movement speed, energy losses and increases the efficiency of foam removal ,.

Claims (1)

Invention Formula A device for flotation sewage treatment, containing a cylindrical body with a conical bottom, coaxially installed inside the body a cylindrical shell with overflow openings in the lower part, forming a receiving chamber for cleaning, washing water, an annular tray for draining purified water, a foam receiver placed in the receiving means for directing foam movement with a float, air nozzles and nozzles for supplying raw water and air, characterized in that, in order to reduce energy costs, it is provided with a ring partitioned coaxially inside the receiving chamber to form an annular gap with the shell, additional nozzles for supplying source water located in the annular gap, with a central axle, means for guiding the movement of the foam in the form of a hinge mounted on the axis of the stroke, equipped with an additional float and elastic blades fixed in its lower part, connected with each other, overlapped, while the foam receiver is located in the receiving chamber along its central axis, and the floats placed in the annular gap. IS sixteen It 12 sixteen 23 21 20 nineteen