RU163702U1 - WASTE WATER FLOTATOR - Google Patents

Abstract

A sewage treatment flotator comprising a cylindrical body mounted vertically on racks, a flotation chamber mounted coaxially with the inside of the housing, a receiving hopper for collecting a pop-up foam layer, sewage inlet and outlet pipes, pipelines and sludge and foam outlet pipes, the lower part of the body is made with a conical shape for collecting heavy sludge and suspended particles, an annular pipe drain manifold with holes located below, connected with a vertical discharge pipe with the formation of a water seal, a mixing chamber associated with the nozzle for supplying wastewater, a radial scraper mechanism, the axis of which is connected through a gearbox with an electric drive, while a movable sleeve is located on the vertical outlet pipe connected to the pipe for removing purified water, making it possible to move this sleeve vertically, moreover, the radial scraper mechanism is located in the upper part of the housing and is connected with the said receiving hopper, the pipe drain manifold is located in the lower part of the housing and covering the flotation cell, and flotation entrance chamber connected to the outlet of the mixing chamber having an inlet for supplying water-saturated air.

Description

The utility model relates to devices for flotation wastewater treatment from oil products, fats, suspended particles and other pollutants and can be used in utilities, in the food, oil, metallurgical industries, energy enterprises, vehicles, etc.

Known hydrocyclone-flotator (RF patent No. 2433000, IPC C02F 1/24, published. 10.11.2011), containing a cylindrical body with a cover, nozzles for supplying the original product, for the removal of foam and clarified liquid, while the inner surface of the wall of the housing is made in the form of a helical surface of a sinusoidal profile, the direction of cutting of which coincides with the direction of rotation of the flow of the shared suspension, the distance between the protrusions of which increases, and the amplitude decreases in the axial direction as you move away from the pipe to supply the original of the product, moreover, a heat electric heater is installed in the housing wall, the windings of which are located on the symmetry axis of each protrusion of the helical surface of the housing.

The disadvantage of such a flotator is the design complexity due to the complex configuration of the inner surface of the housing wall, as well as the insufficient degree of wastewater treatment, since the polluting components are not completely removed from the stream of treated water.

The closest in technical essence to the proposed technical solution is the well-known flotator (RF patent No. 2125970, IPC C02F 1/24, published. 02.10.1999) containing a container with a tangential supply of purified water, a collection of sludge with a branch pipe, an aerator, and pipes of a branch pipe cleaned water and sludge, mounted vertically on racks on a foundation base, a metal cylindrical body having an upper part (cover) in the form of an obtuse-cone, moving upward into a cylindrical pipe for venting air after flotation; a broadened part for collecting and discharging flotation sludge, and in the lower part the flotator casing has an acute-angled conical shaped sedimentation tank for heavy sludge and suspended particles, a tank for collecting purified water having a cylindrical shape and concentrically installed inside the flotator casing, and in the upper part obtuse a conical shaped cover, a wall without bottom turning into an acute-angled conical shape, two tangential patches installed in the upper part of the flotator casing opposite to each other a tank for introducing untreated water, two aerators in the form of tubular rings with perforations installed below the level of entering untreated effluents by 0.3-0.35 of the height of the flotator body concentrically to each other, respectively, along the inner wall of the flotator and on the outer wall of the tank for purified water, a pipe for purified water, while the intake of purified water is made from the very top of the tank for purified water, and to prevent the formation of an air cushion, a fixed tube is installed in the upper part of the tank for purified water for air outlet.

The known device has a complex structure and does not provide a sufficient degree of water purification, because due to the intensive swirling of the flow of untreated water with the help of two radially arranged tangential nozzles, turbulent movement of water occurs in the internal cavity of the housing and the "untreated" water flows into a concentrically integrated tank As a result, some of the contaminants penetrate into its upper part in the form of foam, which is then fed to the output of the flotator.

The technical result, which consists in simplifying the design, increasing the reliability and efficiency of cleaning, is achieved in the proposed flotator for wastewater treatment, comprising a cylindrical body mounted vertically on racks, a flotation chamber fixed coaxially with the inside of the body, a receiving hopper for collecting the surfaced foam layer, sewage inlet and outlet pipes, pipes and sludge and foam outlet pipes, the lower part of the casing is made with a conical shape for collecting heavy sludge and weights particles, in that it contains an annular pipe drain manifold with holes located below, connected to a vertical outlet pipe with the formation of a water seal, a mixing chamber associated with a waste water supply pipe, a radial scraper mechanism, the axis of which is connected through an electric gearbox, and a vertical outlet pipe is a movable coupling associated with the pipe outlet of purified water to enable the movement of the specified coupling vertically, while the radial first scraper mechanism is disposed in the upper portion of the housing and connected to said receiving hopper, a discharge tube collector located at the bottom of the housing covering the flotation cell, and flotation entrance chamber connected to the outlet of the mixing chamber having an inlet for supplying water-saturated air.

The essence of the utility model is illustrated by the drawing, which shows the design of the flotator.

The flotator contains a cylindrical housing 1, mounted vertically on the racks 2, a flotation chamber 3, fixed inside the housing 1 coaxially with it, a pipe 4 for discharge of purified water.

Flotator case 1 is a metal shell with a diameter of 2000 mm. Flotation chamber 3 is a cylindrical pipe with an inner diameter of 400 mm and a height of H = 1500 mm.

Flotation chamber 3 is designed for the interaction of bubbles and polluting particles, i.e. for flotation - extraction of dispersed particles from a liquid using air bubbles.

The internal cavity of the housing 1 serves to isolate the resulting flotation units from the water stream. The lower part 5 of the housing 1 is made with a conical shape for collecting heavy sludge and suspended particles.

Inside the housing 1 there is a pipe drain manifold 6 located in the lower part of the housing 1 with the coverage of the flotation chamber 3 and connected with a vertical discharge pipe 7 with the formation of a water seal.

In the drain manifold 6 below, holes are provided for collecting purified water.

On the vertical outlet pipe 7 is a movable sleeve 8, connected to the pipe 4 for the removal of purified water with the possibility of moving the specified sleeve vertically. The movable clutch 8 is designed to control the water level inside the flotator.

The flotator also contains a radial scraper mechanism 9 located in the upper part of the housing and connected with the receiving hopper 10 for collecting the pop-up foam layer, and a mixing chamber 11 having an inlet pipe 12 for supplying wastewater and a pipe 13 for supplying air-saturated water. The output of the mixing chamber 11 is connected to the input of the flotation chamber 3.

The axis of the radial scraper mechanism 9 is connected through a gearbox 14 with an electric drive 15.

In the lower part 5 of the housing 1 there is a branch pipe 16 for removing heavy sludge with a valve 17. The receiving hopper 10 for collecting the surfaced foam layer has a pipe 18 for removing foam.

The flotator operates as follows.

The purified water enters (indicated by arrow 19) through the nozzle 12 into the mixing chamber 11 from an external compressor through a pressure regulator (not shown in the drawing).

At the same time, a flow of air-saturated water (arrow 20) is supplied through the nozzle 13 into the mixing chamber 11 from an external saturator (not shown).

Saturated water is throttled at the entrance to the flotation chamber, air bubbles are released. With the joint movement of air bubbles and particles of pollution, they interact. Flotation wastewater treatment is effective in the extraction of impurities with hydrophobicity (hydrocarbon liquids, fats, soaps, synthetic detergents, etc.). In the absence of hydrophobicity in wastewater impurities, flotation is carried out using special flotation reagents. After the particles of pollution are fixed on the air bubbles, the waste water enters the inner cavity of the cylindrical body 1, a foam layer of delayed pollution is formed and heavy impurities (sludge) precipitate in the form of a precipitate in the lower part 5 of the housing 1.

The purified water is removed (arrow 21) through a pipe drain manifold 6 located in the lower half of the flotator, a vertical pipe 7 and a pipe 4. Since the holes in the collector 6 are made from below, particles of heavy sludge and foam do not enter it.

The regulation of the water level in the flotator is made by a movable coupling 8, installed in the pipeline 7.

The sediment deposited in the lower part 5 is removed by hydrostatic pressure of water through the pipe 16 when opening the valve 17 (arrow 22).

The surfaced foam layer with particles of contaminants is removed by a scraper mechanism 9, which is driven by the drive 15 through the gearbox 14, into the receiving hopper 10 and then through the pipe 18 (arrow 23) into the sludge accumulator (not shown).

The thickness of the removed layer is set during commissioning. It is necessary to remove the foam mass with minimal watering, i.e. somewhat drained. The most watered layers of foam are at the bottom, while the less watered are at the top. It is recommended that the height of the foam layer be maintained at least 50 ÷ 100 mm.

Thus, the proposed utility model provides a more efficient flotator operation, as wastewater is enriched with air bubbles directly at the inlet of the flotator, the foam layer is removed by mechanical means, and the purified water is taken out by a pipe collector located in the zone of the best water purification (there is no foam with impurities, and a particle of heavy sludge does not enter the openings located on bottom surface of the tubular manifold).

Moreover, the design of the proposed flotator in comparison with the prototype is simpler, which helps to increase reliability in operation.

The proposed flotator operates as part of a wastewater treatment plant and can be repeatedly reproduced at engineering enterprises.

For its manufacture does not require expensive and scarce structural materials and components.

Claims (1)

A sewage treatment flotator comprising a cylindrical body mounted vertically on racks, a flotation chamber mounted coaxially with the inside of the housing, a receiving hopper for collecting a pop-up foam layer, sewage inlet and outlet pipes, pipelines and sludge and foam outlet pipes, the lower part of the body is made with a conical shape for collecting heavy sludge and suspended particles, an annular pipe drain manifold with holes located below, connected with a vertical discharge pipe with the formation of a water seal, a mixing chamber associated with the nozzle for supplying wastewater, a radial scraper mechanism, the axis of which is connected through a gearbox with an electric drive, while a movable sleeve is located on the vertical outlet pipe connected to the pipe for removing purified water, making it possible to move this sleeve vertically, moreover, the radial scraper mechanism is located in the upper part of the housing and is connected with the said receiving hopper, the pipe drain manifold is located in the lower part of the housing and covering the flotation cell, and flotation entrance chamber connected to the outlet of the mixing chamber having an inlet for supplying water-saturated air.

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