RU2769518C2 - Method of treating waste water using an aeration device - Google Patents

Abstract

FIELD: technology of water and air purification.

SUBSTANCE: invention relates to a method of purifying water in public utilities, at microbiological, food and chemical industries, in treatment facilities. Disclosed is a method of treating waste water using an aeration device consisting of a guide supply polyethylene pipe, held horizontally afloat by means of stainless ropes, with aerators reinforced along its entire length, into which air is supplied under pressure. Air from it through rubber hoses and unions is supplied to aerators with weights suspended on the supply pipe, at that, air bubbles rising from the aerator, in accordance with the Rayleigh — Taylor effect, pendulum movement of the pipe (left-right) and aerators attached to it is created, providing an increase in the volume of water aeration.

EFFECT: proposed method enables to reduce the power consumed for aeration of electrical energy and the cost of operation by reducing the power of the blowers when aerating a larger volume of water; ease of assembly reduces investment costs by 1,2–1,5 times.

1 cl, 2 dwg

Description

The invention relates to water purification in public utilities, microbiological, food and chemical industries, treatment facilities.

Known aeration tank for wastewater treatment (see A.S. SU 276814, MKI S02F 3/02, bul. 32, 1969), containing a cylindrical body with a mechanical surface aerator installed in its upper part, a spray deflector in the form of a truncated cone with radial partitions .

The disadvantage of this aeration tank for wastewater treatment is the insufficiently efficient process of saturation of the aerated liquid with atmospheric oxygen due to the formation of stagnant zones.

A well-known aerotank for wastewater treatment (AS SU 1353747, MKI C02F 3/02, bul. 43, 1967), containing supply and discharge pipelines, a cylindrical body with a mechanical surface aerator installed in its upper part, and a guide in the lower part cone, a spray deflector in the form of a truncated cone with radial baffles located in the middle part of the body, attached to its side walls, and horizontal slotted holes are made in them with limbs of their edges in opposite directions, while the upper limb is located with a bulge in the direction of rotation of the aerator.

The disadvantage of this aeration tank for wastewater treatment is the insufficiently effective process of intensifying the saturation of the aerated liquid with atmospheric oxygen due to their incomplete mixing.

The technical problem to be solved by the present invention is the intensification of the process of saturation of the aerated liquid with atmospheric oxygen by supplying it from the pipeline through flexible hoses to the aerator body.

The problem is solved in the following way.

For aeration, guide supply pipes with aerators suspended from them are used. Said supply pipes are kept horizontally afloat by means of stainless steel cables. The air from them is fed through rubber hoses and fittings into the aerators suspended on the supply pipe with assembled weights, while the air bubbles rising from the aerators form a pushing wave and displace the floating supply polyethylene pipe to the right or left, while the shifting floating supply polyethylene pipe pulls attached aerators behind them to a new position, and they form air bubbles on the other side of the pipe, repeating the process in the opposite direction, providing a pendulum movement of the aerators. This increases the aeration efficiency of each of the supply pipes and each of the aerators. To further increase the aeration area, several supply pipes are used, and up to 10 aerators can be suspended from each of them.

As a result, it becomes possible to reduce the power of blowers due to aeration of a larger volume of water, and as a result, a decrease in the power of the consumed electrical energy and the cost of operation. Ease of installation reduces investment costs by 1.2-1.5 times.

On fig. 1 shows a general diagram of a device for biological treatment of waste liquid;

The device works as follows; sewage flows by gravity through pipeline 10 into aerotank 8, compressed air from blowers is fed into pipe 3, which is kept afloat with stainless steel cables 7, air from pipe 3, through rubber hoses 4 and fittings 5, enters aerators 6, and from air in the form of aeration bubbles rises to the surface of the waste liquid.

On fig. 2 shows the process of making pendulum movements by aerators.

The process of making pendulum movements by aerators has the following nature: air bubbles rising from the aerator pipes upwards according to the Rayleigh-Taylor law form a cone, the top of which, in the form of a pushing bubble 3, moves away from the air supply pipe 4, and pushes it away from itself, the displacement pipe pulls the aerators 6 attached to it, the new position of the aerators forms a bubble of drops on the other side of the pipe and the process is repeated in the opposite direction. Thus, the pendulum movement of the aerators increases the volume of aerated water. On Fig. 2 aeration zone of the stationary aerator 1, zone of the moving aerator 2. The amplitude of the movement of the floating pipe "A", the amplitude of the movement of the aerator "B". The purified waste liquid is discharged from the aeration tank through pipe 5.

Implementation of the invention

To organize the aerating system, guide supply pipes made of polyethylene are used. Said supply pipes are kept horizontally afloat by means of stainless steel cables. The air from them is supplied through rubber hoses and fittings to aerators suspended on the supply pipe with weights as an assembly. When air is supplied to the system, air bubbles rising from the aerators form a pushing wave and displace the floating PE supply pipe to the right or left, while the shifting floating PE supply pipe pulls the attached aerators to a new position, and they form air bubbles on the other side of the pipe , repeating the process in the opposite direction, providing the pendulum movement of the aerators. This increases the aeration efficiency of each of the supply pipes and each of the aerators. To further increase the aeration area, several supply pipes are used, and up to 10 aerators can be suspended from each of them.

Claims (2)

1. A method of wastewater treatment using a device for aeration, consisting of a pipe with aerators reinforced along its entire length, into which air enters under pressure, characterized in that a guide supply pipe made of polyethylene is used for aeration, the fasteners of which are made of stainless The cables are organized in such a way that the pipe is kept horizontally afloat, air from it is supplied through rubber hoses and fittings to aerators with weighting assemblies suspended on the supply pipe, while air bubbles rising from the aerators upward form a pushing wave and displace the floating supply polyethylene pipe to the right or left, while the shifting floating polyethylene supply pipe pulls the attached aerators to a new position, repeating the process in the opposite direction, providing the pendulum movement of the aerators. 2. The method according to claim 1, characterized in that up to 10 aerators can be suspended on a floating supply polyethylene pipe.

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