RU2489367C2 - Method of pond aeration and device to this end - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of domestic and industrial effluents in biological ponds. Proposed method comprises forcing atmospheric air into water by ram air. Water is jet mixed with atmospheric air in tube 4 mounted in the pond. Produced air-water mix is forced by wind jet pump 5 at daylight. Pond aerator comprises confusers 2 arranged coroniform at float 1. Said confusers 4 direct airflow via tube 3 into mixing tube 4 located in the pond. Mixing tube 4 is directed upward to receive water inflow in direction aligned with airflow.

EFFECT: water aeration by ram air.

2 cl, 1 dwg

Description

The invention relates to the protection of the aquatic environment and can be used in oxygen enrichment of natural and artificial reservoirs, in particular, stagnant zones in the treatment of domestic and industrial wastewater in biological ponds.

Aerators for wastewater are known in which water and air are mixed using mechanical devices driven by industrial energy sources (B. M. Khudenko. Aerators for wastewater treatment. Stroyizdat. 1973 - 112 pages). A disadvantage of the known mechanical aerators is their high energy and metal consumption, since energy is used from industrial sources and its multiple transformations are performed before a useful action is performed.

Known mobile floating aerator (SU 2082683, publ. 06/27/1997), which uses wind power. But in order to perform a useful action in this aerator, wind energy is converted into mechanical energy of additional devices. This reduces the efficiency and makes aerators metal-intensive. In addition, the disadvantages are the need to orient these aerators towards the wind.

The objective of the invention is to ensure the operation of the aerator without special actions for orientation towards the wind and without converting wind energy into other types of energy.

The technical result is achieved by the fact that in the aeration method, which includes taking water from a reservoir, forming a water stream, taking air from the atmosphere, mixing water and air, discharging air-saturated water into a body of water, according to the invention, the flow of atmospheric wind is captured by confusers and sent to the mixer, where air is mixed with water coming from the depths of the reservoir, and the air-water mixture is discharged from the mixer and dumped into the reservoir by a wind jet pump.

Pond aeration example

Aeration of water is as follows. In the pond, a float is placed and fixed with an anchor with confusers mounted on it with a crown and mixing pipes corresponding to them with wind jet pumps. Each confuser is connected to its own mixing pipe, lowered into the water and having an inlet at the bottom with a valve, such as a ball valve, and a wind jet pump at the upper outlet. With the help of a confuser, atmospheric wind is received and the air flow is directed through the air pipe into the mixing pipe.

First, air pipes are freed from water by means of a wind-driven jet pump and a high-pressure head formed by confusers. This is due to the fact that the hydraulic resistance of the air pipes is less than the hydraulic resistance of the entrance of water from the reservoir into the mixing pipe through the valve. In this case, the total pressure drop across the water column in the air pipe, including the high-pressure air flow in the confuser and the vacuum of the wind jet pump, exceeds the height of the water column in the air pipe. Filling the mixing pipe with air dramatically reduces the hydrostatic pressure of the water from above on the ball of the valve in the mixer and therefore the hydrostatic pressure of the reservoir opens the valve, lifting the ball up. In the future, a stable process is established for the flow of water and air into the mixer.

The water supply is regulated by the diameter of the inlet opening in the mixer valve, and the air supply to the mixer by the ratio of the diameters of the air pipe and the mixer pipe. This mode of movement provides intensive jet mixing of water and air and reliable removal of the mixture to the day surface.

When the atmospheric wind appears, the air stream rushes into one or two confusers, regardless of the direction of wind movement. In this case, the valve at the inlet of the mixing pipe is closed, and the wind jet pump moves into the pond. water from the air pipe of the confuser. When the process of emptying the air pipe and the upper part of the mixing pipe from the water is finished, the hydrostatic pressure of the reservoir raises the ball above the valve inlet and opens the valve. In this case, water from the deep layers of the reservoir rushes into the mixer. Using an air stream flowing into the mixing pipe, they provide jet mixing of water and air, saturating the water with oxygen. A wind-driven jet pump delivers a water-air mixture from the mixing pipe to the atmosphere, and then it flows into the pond.

Thus, water is aerated due to atmospheric wind energy without the expense of energy from industrial sources.

Device for aeration of water in a pond

Known mechanical aerators (BM Khudenko. Aerators for wastewater treatment. Stroyizdat, 1973 - 112 pages). A disadvantage of the known mechanical aerators is their high energy and metal consumption, since energy from industrial sources and its multiple conversion to other types of energy are used before a useful action is performed.

Known mobile floating aerator (SU 2082683, publ. 27.061997)., Which uses the energy of atmospheric wind. But to perform a useful action, it is converted into mechanical energy of additional devices. This makes the aerator metal-intensive and energy-intensive. In addition, the aerator must be constantly oriented towards the atmospheric wind.

The objective of the invention is to provide aeration only due to wind energy and without labor costs for orientation towards the wind, without converting wind energy into other types of energy.

The technical result is achieved by the fact that the air blower is made in the form of confusers, trapping atmospheric wind and directing the air flow into the mixing pipe located in the reservoir and oriented upward with the possibility of water inflow into it from the reservoir in the direction coinciding with the direction of air movement in the same pipe . Moreover, the upper end of this mixing pipe is equipped with a wind jet pump. Confusers for catching the wind are installed with a crown on the float. Each confuser has its own pipe for the passage of air into the mixing chamber. The outlet of the air pipe is placed in the pipe acting as a mixer for jet mixing of water and air. The mixer provides a free flow of water from the depths of the reservoir. The mixer exit is equipped with a wind jet pump

A device for aerating water in a pond is shown in the drawing attached to the description.

The device is mounted on an anchored float 1 and contains confusers 2 mounted by a rim around the circumference of the float. The air pipe 3 of the confuser 2 enters the mixer pipe 4. The output of the air pipe 3 is placed in the mixer pipe 4 with the possibility of water from the depth of the reservoir into the mixer 4. The mixer pipe 4 has fasteners on the pipe 3. The pipe 4 at the lower end has an inlet a hole 6 with a valve, for example, a ball 7. A wind jet vacuum pump 5 is mounted on the upper end of the mixer pipe 4, made in the form of a confuser with a guide tube accommodating the outlet from the mixer 4.

A device for aeration of water in a pond works as follows. The float 1 with the confusers 2 mounted on it is discharged into the water area of the reservoir, anchor in the right place. This completes the preparation of the device for aeration of water.

The start and operation of the aerator is automatic. Whichever side the flow of atmospheric air moves, it is necessarily caught by one of the confusers 2. In confusers 2, the air velocity increases. At the same time, the wind jet pump creates a vacuum above the outlet of the mixer. In the air pipes 3, excess pressure is formed under the action of the high-speed pressure of atmospheric air. Therefore, water and air from the air pipe 3 are pushed into the mixer 4. In the mixer 4, due to the appearance of air, the hydrostatic pressure on the valve ball becomes less than the hydrostatic pressure on the valve ball from the reservoir side. Therefore, the valve opens and water from the reservoir enters the mixer. A stable process is established of mixing water with air and dispensing a water-air mixture to the surface by a wind pump 5 in conjunction with a high-speed head formed by confusers ..

Thus, water is aerated in a pond without the use of industrial energy sources due to environmental energy, namely, due to the injection of atmospheric air by confusers into the mixing pipe, its jet mixing with water and the work of a wind jet pump to deliver the air-water mixture from the mixer to the pond .

Claims (2)

1. The method of aeration of water, including mixing atmospheric
air with water, characterized in that atmospheric air is pumped into the water due to the high-speed pressure of the atmospheric wind with the organization of jet mixing of water and air in a mixing pipe located in the reservoir, and the air-water mixture is released to the surface by means of a wind jet pump. 2. A device for aeration of reservoirs containing an air blower and an air / water mixer, characterized in that the air blower is made in the form of confusers receiving atmospheric wind, located with a crown on the float and directing the air flow through the air pipe into the mixing pipe located in the reservoir, oriented upward, with the possibility of water inflow into it in the direction coinciding with the direction of air movement in it, and dispensing a water-air mixture to the day surface by a wind jet pump.