SU1535849A1 - Apparatus for aerating a liquid - Google Patents

Abstract

This invention relates to the biochemical treatment of domestic and industrial wastewater. The purpose of the invention is to increase the degree of dispersion of the gas-liquid mixture and the saturation of the liquid with gas, the expansion of the volume of aeration and the elimination of stagnant zones. An additional aerated stream 17, generated, for example, by a bubbler 13, is supplied to the flow of fluid 16 aerated in the guiding apparatus 4. The guiding apparatus 4 is equipped with a confuser 10 with partitions 11, which are made concave toward the rotation of the propeller 7. taper α, not exceeding the angle of friction of the liquid on the material of the partitions, and form a vaulted cavity at the outlet of the confuser. The device has high performance. 1 hp f-ly, 4 ill.

Description

This invention relates to the biochemical treatment of domestic and industrial wastewater and can be used in various industries.

The purpose of the invention is to increase the degree of dispersion of the gas-liquid mixture and the saturation of the liquid with gas, the expansion of the volume of aeration and the elimination of stagnant zones.

FIG. 1 shows a device for aerating a liquid; general view; in fig. 2 - guiding device, longitudinal section; in fig. 3 shows section A-A in FIG. 2 in FIG. 4 shows a section BB in FIG. 3,

A device for aerating a fluid includes an aeration tank 1, an air intake 2 with a piping system 3, a guide vane 4, inside of which a shaft 6 is installed on the shaft 5, a distributor 6 and a propeller 7 with blades 8. A reflector 9 of the flow is installed at the bottom of the aero tank. The guide vane 4 is equipped with a confueor 10, inside of which partitions 11 are mounted, made concave against the rotation of the blades of the propeller 7. The lower edges 12 of the concave partitions 11 have a taper angle d that does not exceed the angle of liquid rubbing in the aerotank 1 o the partition material 11. The flow deflector 9 is made, for example, in the form of a bubbler 13 with a pipe 14 and a valve 15, which controls the pressure and volume of air supplied to the bubbler 13. The guide device 4 with a confuser 10 creates a downward flow 16 of air impurity, but the flow deflector 9 as a sparger 13 generates uplink stream 17 WHO-stuffy mixture. The upper edges of the 18 partitions 11 are made with arcuate in Capacity 19, and partitions 11 mol.

20

thirty

35

25

- -, 55 50

Can be installed inside the confuser 11 at an angle to its axis equal to the angle of inclination of the blades of the propeller screw 7.

The device works as follows.

When the shaft 5 is rotated with the propeller screw 7, the fluid along the directing device 4 is pumped down to the flow reflector 9. In this case, a dilution zone is formed above the propeller 7, under which the valve 6 is installed. Through the piping system 3, the air intake valve 2 from the atmosphere or pressure is supplied with air, which is drawn into the swirling fluid flow on the propeller and dispersed in this flow. Next, the aerated liquid enters the confuser 10 of the guide apparatus 4 between the curved partitions, where the pressure inside the flow decreases, stops its twisting, directs it with streams of the descending flow 16 towards the downward aerated flow 17. Through the pipeline 14 to the reflector 9 of the flow (for example , the bubbler 13) is additionally supplied with air by an adjustable gate valve 15, which, through holes, for example a bubbler, is directed to the bottom of the aerotank 1, striking it, splits into small bubbles, mixes with the surroundings ayuschey fluid and the riser 17 rises towards downlink aerated flow 16. Counter streams interact, resulting is further dispersing air, intensive dissipation air mixture, mixing the active layers of liquid in the aeration tank. Partitions 11, of which the lower edges have a taper angle of about W

Fig.Z

eleven

Fiel

Claims (2)

Formula of the invention 1. A device for liquid, containing pipelines, a guide apparatus, a distributor, a shaft, a propeller shaft with blades and a flow reflector, characterized in that, aerating the air intake of the gas-liquid mixture and saturating the liquid with gas, expanding the aeration volume and eliminating stagnant zones, the guiding apparatus equipped with a confuser and partitions fixed inside it, concave towards the rotation of the propeller blades and with upper and lower ribs, the flow reflector is made in the form of a bubbler of compressed air. 2. The device according to p. ^ Characterized in that the upper ribs of the septum are made with arched recesses, the lower ribs are conical, and the septa are installed at an angle to the axis of the confuser, equal to the angle of inclination of the propeller blades