SU870358A1 - Aerating device - Google Patents

Description

(54) DEVICE FOR AERATION The invention relates to devices for aerating sewage during their biological treatment. A device for aerating sewage is known, made in the form of a propeller located in the aft part of the guide tube with a telescopic nozzle ij. However, with the operation of this device, a significant amount of foam is formed on the surface of the liquid in the aeration pool. Because of this, it is necessary to reduce the amount of air supplied to the structure. As a result, the performance of the aerator is reduced. It is also known an aeration device consisting of a guide pipe with a telescopic nozzle, a propeller located in the upper part of the pipe and an air intake pipe. A defoamer in the form of a disk with vertical partitions is mounted on the vertical shaft of the propeller, above the surface of the water. Water is supplied to the defoamer through an intake, the lower (intake) end of which is located under the rowing boat in the guide pipe, and the upper end above the burner. The water discharged by the antifoaming agent extinguishes G23 foam. In this device for aerating waste water the defoamer is supplied by the pressure generated by the propeller screw. Under this pressure, a small amount of water (low pressure) is applied to the defoamer. As a result of scattering a small amount of water with an anti-foaming agent, a small amount of foam is quenched. Because of this, it is necessary to limit the amount of air supplied to the structure, as a result of which the performance of the device is reduced. The aim of the invention is to eliminate this drawback and increase the efficiency of aeration by enhancing foam quenching, forming large quantities with increased air supply and greater oxygen saturation of the air supplied to quench the foam. The goal is achieved by the fact that the aeration device is supplied with a compressed air supply system with two pipes, one of which is attached to the air intake pipe, the other is installed at an acute angle on the intake.

Under the action of air pressure, the rate of water movement through the intake is increased up to the antifoam. This provides an increase in the supply of water to the intake pipe to the defoamer, increasing the defoaming and absorption of water supplied to the defoamer by oxygen in the air, as well as the supply of air to the structure, increasing the efficiency of the aeration device.

The drawing shows the proposed. New device for aeration, cut.

A defoamer 4 is installed on the vertical shaft 1 of the propeller screw 2 enclosed in the guide pipe 3, and the lower end of the intake 5 is located under the screw 2, the upper end of which is located above the defoamer 4.

To the vertical section of the intake 5 is connected at an acute angle to the air pipe 6 connected to the compressor 7. In the pipe 3, under the screw is the end of the air intake pipe 8 connected to the compressor 7.

The device works as follows.

As the screw 2 rotates, water is pumped through pipe 3 down to the bottom of the structure in which the aeration device is located. A portion of the water enters the intake 5 and rises through the pipe. The pipeline b compressor 7 injects air that enters the intake 5 and increases the speed of water movement, increasing the amount of water supplied to the antifoam 4.

Water from the intake pipe 5, draining to defoamer 4, is scattered on the surface and quenches the resulting foam. In this case, the process of saturating water, which extinguishes the foam, with air oxygen, occurs. The pipe 8, under the screw 2, is supplied by the compressor 7 with air that saturates the water with oxygen. The proposed device permits to intensify the formation of foaming, increasing the efficiency of aeration due to more intensive supply of air into the structure and saturation of water with oxygen of the air.

Claims (2)

Invention Formula An aeration device containing a guide tube, a propeller located therein, on a vertical shaft of which a defoamer is installed, an air intake pipe and an intake in the form of a tube, the lower end of which is placed under the propeller and the upper one above the defoamer, which is , in order to increase the aeration efficiency by increasing defoaming and increasing water saturation with oxygen in the air, it is equipped with a compressed air supply system with two pipes, one of which is attached to the air intake pipes e, and another at an acute angle mounted on the intake. Sources of information taken into account in the examination. I 1. USSR author's certificate No. 430070, cl. C 02 C 1/10, 1972. 2. USSR author's certificate No. 537995, cl. C 02 C 1/10, 1975.