SU1576497A1 - Device for water aeration - Google Patents

Abstract

The invention can be used to enrich the water of oxygen in air in fish ponds, lakes and rivers. The aim of the invention is to provide aeration of water without the cost of electrical and mechanical energy through the use of wind energy. The device for aeration of water contains a hollow rack 1, an air-water ejector 2 in the form of an airplane wing coiled into a ring, with a convex profile in cross section, with an angle of attack relative to the air flow α = 5-10 °, ring flaps 7 and 8, and Also, the sprayer 4 connected to the supply line 5. When the internal and external surfaces of the air-water ejector 2 flow around the wind flow with the ring flaps 7 and 8, a reduced pressure zone is formed inside the channel, which contributes to raising water through the pipeline 5 to the sprayer 4 and sprinkling last. The invention reduces the cost of water aeration. 3 hp f-ly, 1 ill.

Description

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The invention relates to devices for saturating water with oxygen of the Air and can be used to aerate water in fish ponds, ponds, lakes and rivers in areas where there is a wind blowing at a speed of 4 m / s and more.

The aim of the invention is to depreciate the aeration of water without the expense of electrical and mechanical energy through the use of wind energy.

The drawing shows a device for aerating water, a cross-section. A device for aerating water in fish ponds using wind energy consists of a hollow rack 1, on the upper part of which, on a hub, movably relative to the vertical axis, at a height of 5-3 m above the water level in the pond, an air-water ejector 2 is made in the form of a wing of a plane rolled up in a ring, with a flat-convex profile in cross section, with an angle of attack to the incoming air flow about 5-10 °. In the zone of the narrow part of the channel 3 formed by the annular wing of the ejector 2, inside the profile, an annular atomizer 4 with openings for supplying water to the air stream is placed. The sprayer 4 is connected to the water supply (intake) pipe 5, passing inside the hollow rack 1 and immersed at the other end into the water to a depth of 1.5-2 m. Pipeline 5 serves to take water from the reservoir and feed it to the sprayer 4. To the upper Part of the sprayer 4 is attached to the tube 6, which passes through the profile from the top, is closed with a cap and serves to clean the water supply pipe 5 in case of clogging or freezing in the winter.

Behind the expanding part of the channel formed by the air-water ejector 2, two ring closures 7 and 8 are installed one after the other, forming the more widening channel (socket). The annular flap 7 is set at an angle to the incoming air flow jb s 12-18 °, and the annular flap 8 is at an angle of 20-25 °, and they are arranged so that they form slots 9 and 10 between the air-water ejector 2

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and the flap 7, as well as between the flaps 7 and 8, through which air flows from the high pressure zone from the outer side of the annular wing to the low pressure zone formed inside the channel.

Behind the annular flap 3, parallel to the vertical plane, blades 11 are installed, ensuring the orientation of the device with the inlet diffuser in the opposite direction to the wind flow.

In order to prevent water from entering and freezing it in winter, the space between the hollow stand 1 and the outer surface of the supply line 5 passing inside the stand 1 is closed at the bottom by a lid 12 with an omental seal 13 and is filled with thermal insulating material 14.

In order to avoid suction with water, a grid 15 is installed in the water intake pipe 5 of small fish and other objects at its end, submerged in water.

The entire device can be fixed on a pile 16 driven into the bottom at shallow water bodies and placed behind the core 17 at the bottom of the stretch 17 or at deep water bodies can be placed on the floats also with increased stretching 1 7.

A device for aeration of water works as follows.

When the wind flow is wrapped around the inner and outer surfaces of the air-water ejector 2 with annular flaps 7 and 8 inside and the outside, the channel formed by them creates different air source speeds and different aerodynamic pressures that depend on the shape of the wing profile, its size, angle of attack ОЈ, angle of deviation of flaps ft and У, and sizes of gaps between them, as well as between air-water ejector 2 and flap 7. When flowing around air-water ejector 2 with a flat convex profile in section and angle of attack to raid 5-10 present the flow of the channel 3 inside constituted of that wing, there is a significant change in air flow velocity and a reduced pressure zone is formed, which reaches the maximum value in the narrowest chas.- minute channel 3.

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When the air flow rate in the narrow part of the channel 3 is reached, about 240-280 m / s, the pressure ratio in this part of the channel Re to atmor spheric P can reach .0.6.

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With such a decrease in pressure, the air-water ejector 2 lifts the water column through conduit 5 due to the atmospheric pressure to the height of the ejector installation above the water level. Raised water enters the sprayer 4, installed in the narrowest part of the channel, through the holes in the wall of the narrow part of the channel is sprayed into small splashes that fly out of the ejector, and, enriched in air flow with atmospheric oxygen, fall into the water.

The flaps 7 and 8 installed behind the air-water ejector 2 and the slits for the air to flow from the pressure zone to the pressure drop zone form a jet with a strong flow along the inner expanding wall of the channel, which ensures the continuous flow of the air flow inside the channel and allows in its narrow part of high speeds, providing the ejection of water from the reservoir.

In the event of a change in the wind direction, the blades 11 mounted behind the flap 8, under the action of the lateral flow, turn the device in again towards the wind flow by the inlet diffuser.

The device can be made of any performance. At the same time, an increase in wind speed of more than 4.0 m / s leads to a dramatic increase in productivity, since the power developed by the wind, and in this case the device, is directly dependent on the effective area of the working part of the device and cubic dependence on wind speed.

In addition, attention should be paid to the method of enriching water with atmospheric oxygen. There is a known method of aerating water by means of pumping with the aid of compressors of atmospheric air under water through pipes with holes in the walls, and sometimes with the use of filter plates.

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This achieves a reduction of the times in the air bubbles and its maximum dissolution in water.

However, observations show that the fish are trying to stay away from those places where such aerators operate.

The composition of air in water (water

in air) differs from atmospheric air composition. Atmospheric air contains 78% nitrogen and 21% oxygen, air extracted from water - 63% nitrogen and 36% oxygen. The injection of atmospheric air under water and its dissolution disrupts the balance of water air, i.e. the content of not only oxygen but also nitrogen dissolved in water increases, which

20 leads to unfavorable conditions for fish and other inhabitants of the reservoir, and sometimes to specific diseases.

Therefore, preference is given to aeration devices based on the method of spraying water over a pond. The advantage of the proposed method lies in the fact that water droplets moving in the medium of air,

30 absorbs gases from it in accordance with its absorption coefficient, which is 0.035 volumes of oxygen per volume of water and 0.017 volumes of nitrogen, i.e. a drop of water absorbs nitrogen two times less than oxygen. This also explains the advantage of cascade aeration systems. The invention reduces the cost of water aeration.

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Claims (2)

1. A device for aerating water, containing a hollow rack, a water lifting device with a spray gun in the upper part of the rack, a water supply pipe connected to the spray gun, characterized in that, in order to provide aeration of water without the cost of electrical and mechanical energy by using wind energy, the water-lifting device is made in the form of an air-water ejector in the form of a wing of an aircraft, coiled into a ring, with a flat-to-convex profile in cross section, with an angle of attack relative to the air flow, equal to 5-10 °, When this dispenser is located in the narrowest part of the air-water chamber of the ejector. 35 7 15764978 2. Pop-1 device, distinguish between a hollow rack and is provided with insulation that, with an air-body placed in the space of the inter-ejector, at the exit is supplied with the walls of the water-supplying pipe-line flaps, and also salmi, one after the other, installed in the place of entry And forming a gap between each other, the supply pipe in the hollow Also between the ejector and the first rest. the flow of air ring closed-4. The device according to claim 1, about t l and - com. - that the air 3. The device according to claim 1, about the l and - the water ejector is equipped with blades and the fact that the water supply is installed with the possibility of moving the pipeline is installed internally relative to the rack.