SU1625330A3 - Apparatus for aerating liquids - Google Patents

Abstract

1. A device for aerating liquids comprising : a rotor (2) whose rotational axis is vertical and which is disposed near the bottom of a tank and which intakes air and liquid ; and a stator (4) which extends around the rotor (2) and has a closed ring of right-angled cross-section flow ducts (8) each having an entry for the liquid-air mixture, the flow ducts (8) being inclined relatively to the radial direction in the direction of rotation of the rotor (2), characterised in that the flow ducts (8) are separated from one another by wedge-shaped gaps whose vertices are disposed between the immediately adjacent inlets, and the vertical boundary surfaces of each flow duct (8) either extend parallel to one another or converge or diverge at an angle of at most 7 degrees.

Description

from parallelism should not exceed 7 ° 0. The proposed design ensures uniform mixing of liquid and gas and effective aeration in large-diameter tanks “6 or 0”

The invention relates to devices for introducing and dissolving a gas in a liquid.

The purpose of the invention is to increase the efficiency of aeration by ensuring uniform mixing of the liquid with gas.

FIG. 01 shows a device for aerating a liquid, side view in partial section; FIG. 2 shows the stator of the aeration device, a top view with a partial cut; Fig.3 is a section aa on big. 2 on an enlarged scale; on Fig image of the U-shaped flow channel in cross section on an enlarged scale; Fig. 5 is a horizontal section of the stator with outwardly expanding flow channels; Fig. 6 is a horizontal section of the stator with flow channels converging to the outside.

The aeration device is located above the bottom 1 of the aeration tank and consists of a rotor 2 driven by the motor 3 and the stator rotor 2 surrounding the rotor 40. The vertical rotor shaft 5 passes through the bottom 1 of the tank to which the flange 3 is attached. air through the air duct 6 is sucked in from above and coaxially supplied to the rotor 2, which through the axial through hole 7 of the stator 4 simultaneously sucks the fluid from the tank. Together with the air, the liquid enters the stator.

In the stator 4, the mixture of fluid with air enters the flow channels 8, which, according to FIGS. 1-3, are formed by vertical walls 9, which are inserted between the annular disks 10 and 11. The vertical walls 9 of the adjacent flow channels 8 or diverge in the direction the outer circumference of the stator 4, either narrowed or parallel to each other. This embodiment provides approximately the same input speed of the mixture of liquid with air from the rotor 2 into the stator 4 and the corresponding output flow rate from the flow channels 8.

As shown in FIG. 4, an especially simple stator structure can be obtained due to the fact that the flow channels 8 are formed by U-shaped profiles 12, which are mounted on an annular disk 13. Such a construction provides not only simple manufacturing, but also gives an advantage when cleaning the stator, since the wedge-shaped areas between adjacent flow channels are easily accessible.

In order to be able to set the output speed of the mixture of fluid with air from the stator with available power on the rotor for aeration in a tank of a certain diameter, the limiting walls of the individual flow channels 8 are not only parallel. If, for example, the walls 9 of the individual flow channels 8 are made diverging to the outer circumference of the stator 4, the flow is slowed down in the channels 8o. The angle oi between the vertical walls 9 should not exceed 7 °, since otherwise you can expect increased turbulence and shorter range of flow from channel 8

If it is necessary to increase the flow rate in the region of the outer circumference of the stator 4 relative to the input velocity, then the walls 9 are narrowed outwardly, as shown in Fig. 6, and in this case the angle between the vertical walls 9 of the individual channels should be limited by a maximum 7 °.

The device works as follows.

The rotor is driven by a motor 3 mounted above the bottom 1 of the reservoir with the liquid to be treated. The air enters through the duct 6, mixes with the fluid that is sucked through the opening 7. The mixture of liquid with air or gas enters the flow channels 8.

Bounded by vertical guide walls and rectangular in

flow sections; the channels make directional ejection of the mixture of liquid and air into the liquid to be aerated, and uniform aeration of the liquid is achieved in the area around the stator.

Due to the relatively high output flow rate, uniform aeration can be achieved in tanks of increased diameter.

Claims (1)

Invention Formula A device for the aeration of liquids containing a rotor with a vertical axis of rotation and a pipeline for supplying Aa Figz air surrounding the stator rotor in the form of an annular disk and a crown of flow channels with vertical restrictive walls located around the axial through hole, characterized in that, in order to increase the efficiency of aeration by ensuring uniform mixing of the liquid with the gas, the flow channels are either parallel to each other walls, or with walls having an expansion or contraction as much as possible with a rectangular cross section and located on the stator with a divergence to its outer edge kyo. Fig.i 13 4 No. / G5