RU143014U1 - FLOTATION MACHINE FOR SEWAGE TREATMENT - Google Patents

Abstract

1. A flotation machine for wastewater treatment, including a housing, inside which partitions are installed that divide the working space into chambers with a thin-layer clarification unit in the outlet chamber, and pipes for supplying dirty water and reagents and pipes for draining clean water and foam are located on the outside of the housing characterized in that an air-conditioning chamber is additionally located in the housing, inside of which a mixer with a casing pipe is installed, having from 2 to 4 windows with diameters ranging from 0.1 to 0.5 of the casing diameter ruby.2. Flotation machine according to claim 1, characterized in that the casing is made in the form of a conical diffuser with an angle equal to from 5º to 45 °. 3. The flotation machine according to claim 1, characterized in that the mixer has from 2 to 6 blades with an angle of inclination of the blades equal to from 15º to 75 °.

Description

Technical field

The utility model relates to devices and apparatus for treating industrial wastewater.

State of the art

A flotation machine for wastewater treatment is known, including a housing divided inside by partitions into chambers and thin-layer clarification units in the outlet chamber, and pipes for supplying dirty water and reagents, draining clean water are located on the outside of the housing (RF Patent 2184705, dated 07.09 .2000, IPC, C02F 1/24, C02F 103: 04).

A significant disadvantage of such a flotation machine for wastewater treatment is the low degree of purification and high consumption of reagents.

The closest technical solution is a flotation machine for wastewater treatment, including a casing, inside which partitions are installed that divide the working space into chambers with a thin-layer clarification unit in the outlet chamber, and pipes for supplying dirty water and reagents, draining clean water are located on the outside of the casing and foam (RF Patent 2130897, pr. from 10.21.1997, IPC, C02F 1/24, B03D 1/14).

The disadvantages of the known flotation machine for wastewater treatment is the low degree of wastewater treatment, high consumption of reagents, as well as the large size of the flotation machine.

Utility Model Disclosure

The purpose of the utility model is to increase the degree of purification, reduce the consumption of reagents, reduce the size of the flotation machine.

This goal is achieved by the fact that the proposed flotation machine for wastewater treatment, including a housing, inside which there are partitions that divide the working space into cameras with

a thin-layer clarification unit in the outlet chamber, and on the outside of the case there are pipes for supplying dirty water and reagents, drainage of clean water and foam, moreover, an air-conditioning chamber is additionally located in the case, inside of which there is a mixer with a casing pipe from 2 to 4 windows with with a diameter of 0.1 to 0.5 of the diameter of the casing, and the casing can be made in the form of a conical diffuser with an angle α equal to from 5 to 45 °, and the mixer has from 2 to 6 blades with an angle of inclination of the blades β equal to from 15 to 75 °.

List of drawings

In FIG. 1 shows a flotation machine for wastewater treatment with a casing in the form of a cylinder.

In FIG. 2 shows a flotation machine for wastewater treatment with a casing in the form of a conical diffuser.

In FIG. 3 shows a cylindrical casing.

In FIG. 4 shows a propeller-type mixer.

Utility Model Implementation

The proposed flotation machine for wastewater treatment (Fig. 1) consists of a housing 1, divided by partitions 9 into chambers with a thin-layer clarification unit 10 in the outlet chamber. Inside the housing 1 there is an additional conditioning chamber, inside of which a mixer 12 is installed, having from 2 to 6 blades, with a drive 5 and a casing 6 of diameter D, with windows 7 of diameter d (Fig. 3). In the upper part of the housing 1 is a foam trough 4 with a pipe 8 for the removal of foam. A block of thin-layer clarification 10 is located in the output chamber of the housing 1. On the outside of the housing 1 there are nozzles for supplying the original (dirty) water 2, reagents 3 and nozzles for the removal of foam 8, purified water 11, and also the nozzle for introducing the working fluid 13.

For the treatment of wastewater with stable flakes (e.g. wastewater contaminated with petroleum products), a casing can be performed

in the form of a cylinder (Fig. 1), and for wastewater treatment with unstable flakes (for example, water treatment from activated sludge) in the form of a conical diffuser with an angle α (Fig. 2). In this case, a propeller-type mixer is installed with the angle of inclination of the blades β (Fig. 4). These techniques allow you to maintain the structure of the resulting flakes.

The principle of operation of the proposed flotation machine for wastewater treatment is as follows. The source (dirty) water through the pipe 2 enters the housing 1 of the flotation machine, where through the pipe 3 a solution of reagents and a working fluid (gas-air mixture) is supplied through the pipe 13.

The mixing of these flows occurs due to the rotation of the mixer 12 using the drive 5. The effectiveness of the mixer 12 depends on the number of blades and their angles of inclination to the horizon β, as well as on the angle of the conical diffuser α and the area of the windows 7 in the casing. The optimal parameters of the angle α are from 5 to 45 °, and the diameter of the windows in the casing is from 0.1 to 0.5 of the diameter of the casing, and the number of windows is from 2 to 4. The angle of inclination of the mixer blades is from 15 to 75 °.

As a result of the mixing of these flows, the formation of pollution flotation complexes — gas bubbles — occurs. The resulting flotation complexes float, forming a foam layer, which periodically merges into the foam trough, from where it is removed through the nozzle 8. The purified water passes through the shelf system of the thin-layer clarification unit 10 and then through the nozzle 11 it is discharged from the flotation machine body 1.

An increase in the area of windows in the casing helps to increase the flow rate of the fluid pumped through them, which leads to an increase in the air trapped from the funnel formed in the casing, as well as its finer dispersion. This is confirmed by our numerous experiments. An increase in the amount of sucked air and an increase in its degree of dispersion

Contributes to a higher likelihood of trapping particles of air bubbles. The resulting spectrum of air bubbles with optimal parameters of the conditioning chamber helps to reduce flotation time and, accordingly, reduce the size of the flotation machine. The manifestation of these phenomena as a whole helps to increase the efficiency of cleaning by flotation method.

The selected intervals of the window areas are justified by conducting experimental studies. At the same time, the choice of window areas, estimated by diameter, less than the minimum value does not increase the cleaning efficiency, and when using windows more than the maximum value, the achieved effect does not increase.

Depending on the type of waste water and the reagents casing may be formed as a cylinder or a conical diffuser with an angle α in the range from 5 ^to 45, and wherein the selected number of blades between 2 do6 and the optimum angle of inclination of the mixer blades in the interval from 15 up to 75 ^about obtained experimentally.

These techniques allow you to maintain the structure of the resulting flakes, thereby increasing the degree of purification. In addition, the introduction of the reagent in this case is the most effective, since it is evenly distributed throughout the chamber, which contributes to better formation and subsequent preservation of flakes from contaminant particles.

As a result of a series of experiments, it was found that the efficiency of cleaning dirty (waste) water in the proposed flotation machine for wastewater treatment is from 95 to 99% in terms of hydrophobic pollution, and when using the prototype unit, the degree of purification does not exceed 80.0%.

Thus, the proposed flotation machine for wastewater treatment can increase the efficiency of water treatment by approximately

10 ... 20%, reduce the consumption of reagents by improving mixing by 20 ... 25%, and also reduce the size occupied by the flotation machine, by 25 ... 35%.

Claims (3)

1. A flotation machine for wastewater treatment, including a housing, inside which partitions are installed that divide the working space into chambers with a thin-layer clarification unit in the outlet chamber, and pipes for supplying dirty water and reagents and pipes for draining clean water and foam are located on the outside of the housing characterized in that an air-conditioning chamber is additionally located in the housing, inside of which a mixer with a casing pipe is installed, having from 2 to 4 windows with diameters ranging from 0.1 to 0.5 of the casing diameter Pipes. 2. Flotation machine according to claim 1, characterized in that the casing is made in the form of a conical diffuser with an angle equal to from 5º to 45 °. 3. Flotation machine according to claim 1, characterized in that the mixer has from 2 to 6 blades with an angle of inclination of the blades equal to from 15º to 75 °.