SU1328314A2 - Aerator - Google Patents

Abstract

The invention relates to the biochemical purification of water, is intended for use in biochemical wastewater treatment plants in aeration facilities, can be used in domestic and industrial wastewater treatment plants and allows for an increase in the efficiency of wastewater aeration. the amount of air in the rotor cavity of the aerator through the holes 12, made in the walls of the hollow cylinder 7, due to the fact that the aerator is equipped with a hollow closed top and bottom cylinder 13, installed inside the hollow cylinder 7 with the possibility of free movement and tightly overlapping its cross section, as well as through the holes 12, the rubber membrane 8 is protected from mechanical damage to the return activated sludge pipeline 14, which increases the reliability of the aerator. 2 Il. Q € e d. 1

Description

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The invention relates to the biochemical treatment of wastewater, in particular to devices for saturation of wastewater with air oxygen, and is an improvement of the aerator according to the author. St. 1328314.

The purpose of the invention is to increase the efficiency of wastewater aeration and the reliability of the aerator.

FIG. 1 shows the aerator at the initial position of the membrane, a longitudinal section; FIG. 2 is the same when air is supplied and its excess amount is discharged into the rotor cavity, a longitudinal section.

The aerator contains a drive hollow shaft 1 with a sliding sleeve 2, a rotor made of an upper disk with a disk 4 with openings 5 lying circumferentially between the radial blades 6, a hollow cylinder 7, the lower end of which is closed by a rubber membrane 8, and the upper end attached to the disk 3 and through the hole 9 communicates with the cavity 10 of the shaft 1, through which air is supplied to the hollow cylinder 7, the lower part of which is provided with radial blades 1 1,

angled on its outer side surface under the holes 5 of the disk 4. In the walls of the polo of the cylinder 7 there are holes 12 located between the radial blades 6, concentrically inside it there is an additional cylinder 13 closed at the top and bottom, tightly blocking the cross section of the cylinder 7 and installed with the possibility of free movement in the vertical direction, the hollow cylinder 7 of the aerator is located above the return sludge pipeline 14, which is concentrically mounted inside the guide pipe. would be 15.

The aerator works as follows.

When the rotor of the aerator rotates, liquid blades 11 are injected through holes 5 into the interior of the rotor, from where it is sprayed by the centrifugal force generated by the rotation of the rotor by blades 6 on the surface of the liquid in the structure, while the liquid being sprayed is saturated with atmospheric oxygen. The blades 11 fluid is pumped along the guide tube 15, at the same time pumping occurs.

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activated sludge through the pipe 14 from the secondary clarifier, mixing it with the sludge liquid of the structure pumped through the pipe 15, and spraying over the surface in the structure. If necessary, reduce the flow rate of the pumped active sludge through the sliding sleeve 2 through the cavity 10 and the opening 9 into the hollow cylinder 7 supply air, the pressure inside the cylinder increases, and the additional cylinder 13, which tightly overlaps the cross-section of the cylinder 7, begins to descend and move it through the liquid (the hollow cylinder 7 is filled with liquid spontaneously at the initial position of the membrane through the holes 12, in Fig. 1 the position of the lower edge of the cylinder 13 is shown in dotted lines) is transferred to the rubber th membrane which begins to stretch, taking the shape of a sphere (FIG. 2). The living section of the conduit 14, through which the activated sludge from the secondary sedimentation tank is pumped, decreases and, as a result, the consumption of the pumped sludge decreases. With an excessive air supply inside the hollow cylinder 7, the upper edge of the cylinder 13 is located below the holes 12 (the flow rate of the pumped sludge is minimal), the membrane is maximally stretched, does not come in contact with the pipe: Wire 14, and excess air leaves the cylinder cavity 7 through the holes 12 inside the rotor between the blades 6, which contributes to the additional aeration of the liquid. Due to the fact that the air from the cavity of the cylinder 7 through the holes 12 goes into the rotor, the further downward movement of the cylinder 13 stops, the membrane does not expand, which prevents it from damage. Pipeline 14 of return sludge and, consequently, increases reliability work aerator.

If it is necessary to increase the volume of pumped sludge, air is blown out of the hollow cylinder 7, while the pressure inside it drops, the membrane 8 is reduced, the cylinder 13 rises up, is forced out into the eye through the holes 12 into the inside of the rotor, and then blocks the latter, preventing liquid from entering into the cavity of cylinder 7 between cylinder 13 and disc 3,

With further release of air from the hollow cylinder 7, the membrane occupies the initial position (Fig. 1), cylinder 13 rises as much as possible upwards, opening holes 12 (Fig. 1, shown in dotted lines), while the flow rate of the pumped active sludge is maximum.

Thus, by supplying or discharging air into the inside of the cylinder 7, the flow rate of the pumped active sludge can be controlled, while with excessive air supply inside the cylinder 7, due to the cylinder 13 and the openings 12, its excess amount goes inside the rotor, which contributes to additional aeration of the liquid and at the same time protects the membrane from contact with the pipeline 14

and, therefore, against damage, which increases the reliability of the aerator.

Claims (1)

Invention Formula Aerator on auth. St. No. 1234376, characterized in that, in order to increase the efficiency and reliability of the aerator, the hollow cylinder is provided with a further cylinder concentrically located inside it, raised at the top and bottom by an additional cylinder, installed with the possibility of free movement in the vertical direction and tightly overlapping the cross section of the hollow cylinder, in the walls of the hollow cylinder holes are made, located | between the radial blades. Compiled by G. Meskhi Editor N. Gunko Tehred I.Popovich Order 3447/26 Circulation 850 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Design, And cpu2.2 Proofreader S. Cherni