SU1063790A1 - Apparatus for purifying effluents - Google Patents

Abstract

1.DRAIN DEVICE FOR CLEANING WASTE WATER, containing an aeration tank with aerators, a secondary settling tank and supply and removal pipelines for the water being treated, characterized in that, in order to increase the economy of use and quality of cleaning, the secondary settling tanks are placed in the upper part of the aero tank and made gutters with a lower longitudinal slit and catchment trays, the aeration tank is equipped with a mixer with a tip installed along its vertical axis, as well as vertical stabilization pipes located under the aerators, p In this case, the latter are made cavitation, and the length of stabilization pipes is not less than half the working depth of the aerotank. 2. The device pop.

Description

This invention relates to the biological treatment of wastewater.

A device for sewage treatment is known, which contains an aeration tank with aerators and a secondary settling tank. Directly under the bottom of the tank, gas is introduced into the liquid by injectors, the settled sludge from the secondary settling tank is completely or partially returned to the tank for aeration at its base with the help of a pump. The secondary sedimentation tank is located concentrically around the tank intended for aeration. The aeration tank is connected to the secondary settling tank by means of supply pipes of at least one cyclone for degassing water and forming flocks. The liquid level in the secondary settling tank is set in one or more overflows in such a way that it is 0.1-0.2 m below the liquid level in the tank for aeration ij.

However, increasing the depth of the water in the aeration tank requires the use of high-pressure equipment injecting gas into the aeration tank. The device is complicated in terms of the use of cyclones for the degassing of water and the formation of flakes, the pressure feed of return sludge from the secondary clarifier to the aeration tank.

The purpose of the invention is to improve the quality of cleaning and efficiency of use of the device.

This goal is achieved by the fact that in the device containing the aeration tank with aerators, the secondary settling tank and the supply and discharge pipelines of the water being treated, the secondary drain pits are located in the upper part of the aero tank and are made in the form of troughs with a lower longitudinal slit and catchment lots, the aeration tank is equipped with the vertical axis of the mixer with the tip, as well as the vertical stabilization pipes located under the aerators, the latter being made cavitation, and the length of the stabilization pipes is not less e half of the working depth of the aerotank.

In addition, the mixer tip is made of a stator with bearings and a rotor in the form of a hollow disk with inclined holes around the periphery.

FIG. 1 shows a wastewater treatment device, longitudinal section; in fig. 2 - the same in terms of;

in fig. 3 mixer to stiffen sludge; in fig. 4 shows section A-A in FIG. 3

The device for wastewater treatment contains a tank 1, settling

5 gutters - secondary clarifiers 2, pipeline 3 for supplying effluents to treatment, longitudinal shell 4 for discharging water into secondary clarifiers, drain chutes 5, pipeline 6 for

0 removal of treated wastewater, pipe 7 to remove excess sludge, aerators 8 with stabilization: pipes 9, platform 10 for a pump 11 having a suction pipe 12

5 with a coarse filter 13 and a pressure pipe 14, a mixer 15 for stirring up sludge, having a coupling 16, a stator 17, a rotor 18, a support 19, a packing cuff 20, The rotor 18 of a mixer 15 has jet openings 21.

The device works as follows.

Source wastewater enters tank 1 for aeration at its

the bases along the inlet pipeline 3. The cavitational aerators 8 saturate the wastewater with oxygen of the air and provide the suction mixture up through stabilization

0 pipes 9 lower layers

waters The pump 11 through the suction pipe 12 and the coarse filter 13 supplies water from the upper layers of the liquid enriched with oxygen through

5 pressure line 14 to mixer 15 to stiffen the sludge at the bottom of tank 1.

The jets emanating from the orifices 21 rotate the rotor 18 mounted on the bearing 19. The rotational movement of the jets produces intensive stirring up of the sludge, which through stabilization pipes 9 goes to the aerators 8 for oxidation. Through

The longitudinal slots 4 of the sludge mixture flow into the secondary settling tanks 2. The clarified drainage is collected by the chutes 5 and discharged from the tank 1 through the discharge pipe 6 for further processing, periodically after the preliminary shutdown of the aerators 8 and the pump 11 is discharged, it is discharged after dehydration.

The use of the proposed device provides homogenization

5 sludge mixture and allows you to simplify the tower aerotank and use aeration equipment for conventional aeroteuk with a working depth of 5 m.

tB

QJut.

nineteen

Claims (2)

1. A DEVICE FOR WASTE WATER CLEANING, containing aeration tank with aerators, a secondary settler and pipelines for supplying and discharging treated water, characterized in that, in order to increase the efficiency of use and quality of cleaning, the secondary settlers are located in the upper part of the aeration tank and are made in the form troughs with a lower longitudinal slit and drainage chutes, the aeration tank is equipped with a mixer with a tip installed along its vertical axis, as well as vertical stabilization pipes located under the aerators, while the latter are made by cavitation, and the length of the stabilization pipes is not less than half the working depth of the aeration tank. 2. The device pop. 1, due to the fact that the tip of the mixer is made of a stator with bearings and a rotor in the form of a hollow disk with inclined holes along the periphery. e 10637911 Qut. 1