WO2018093134A2

WO2018093134A2 - Device for supplying oxygen in water body

Info

Publication number: WO2018093134A2
Application number: PCT/KR2017/012921
Authority: WO
Inventors: 양시천
Original assignee: 주식회사 한국아쿠오시스; 양시천
Priority date: 2016-11-15
Filing date: 2017-11-15
Publication date: 2018-05-24
Also published as: KR101767402B1; WO2018093134A3

Abstract

The present invention provides a device for supplying oxygen in a water body, the device being composed of: a guiding pipe for water mixed with bubbles that connects an upper portion and a lower portion of the water body; a delivering means for water mixed with bubbles that causes the water in the upper portion of the water body to flow toward the lower portion of the water body through the guiding pipe for water mixed with bubbles; an air supplying means that supplies air to the guiding pipe for water mixed with bubbles; an air bubble removing means connected to an end of the guiding pipe for water mixed with bubbles to separate and remove air bubbles that remain in the water mixed with bubbles; and a discharging pipe for water dissolved oxygen that discharges toward the lower portion of the water body the water that has passed through the air bubble removing means. The device for supplying oxygen in a water body can improve the economic feasibility and efficiency of a purification system for water treatment, a fish culture system, and the like.

Description

Oxygen Supply in Waterbody

The present invention relates to an oxygen supply device for supplying dissolved oxygen (DO) into a body of water, such as water in a biological reaction tank or fish farming tank, artificial lake or natural lake.

Water bodies, such as water in artificial reactors or natural lakes, for biological reaction tanks to clean sewage or wastewater, artificial lakes, or natural lakes, constantly require oxygen for the respiration of aerobic living organisms.

The source of oxygen in the body of water is usually the oxygen present in the atmosphere at about 21%, or oxygen, a carbon assimilation product of photosynthetic organisms that survives in water, when the rate of oxygen consumption is faster than the supply rate, Life eventually dies from oxygen deficiency. Therefore, when it is necessary to avoid such a situation, it is necessary to supply dissolved oxygen to the water body by an artificial method, and in general, a method of contacting air with water is used. However, the saturated solubility of oxygen in water upon contact with the atmosphere is only about 9 ppm under atmospheric pressure at the water temperature of 19 ° C. However, this is equivalent to 4 ppm, which is the difference between the saturated solubility of oxygen and the oxygen concentration in water, assuming that the oxygen consumer supplies air directly below the surface of the water to keep the dissolved oxygen concentration in a certain body of water present at 5 ppm. The dissolution pressure (ΔP) means that oxygen is dissolved and diffused through the contact surface between air and water, so even if a large amount of air is supplied to the body, most of the oxygen is wasted out of the water and the oxygen dissolved in the water is extremely limited. It will only be. In order to compensate for this, air and water should be brought into contact with water as deep as possible to increase oxygen saturation solubility and increase oxygen supply efficiency. For example, when air and water are contacted at a depth of 10m (assuming water pressure is 1 atm), the saturated solubility of oxygen is increased to about 18ppm, so if you want to keep the dissolved oxygen concentration as 5ppm as before, By dissolving and diffusing oxygen through the contact surface between air and water with a corresponding dissolution pressure difference, the oxygen supply efficiency can be increased more than three times, which can increase the oxygen concentration in the lower part of the water body to 14 ppm under the same conditions. It also means that creatures can be much more active. However, there are problems that make it difficult to attain this effect in reality.

That is, the conventional method of artificially supplying dissolved oxygen to the water body, as shown in Figure 1, the air supply means (usually blower, 1) installed outside the water reservoir 9, the air conveying pipe (3) And a method of blowing air bubbles into the lower part of the target body using the diffuser 5 or the like. In FIG. 1, reference numeral 8 denotes an air bubble.

However, the problem with this method is, firstly, that the deeper the water depth is required to supply the air corresponding to the pressure, so the load on the blower is increased, the energy cost increases. Secondly, by supplying a pressurized air to raise the oxygen concentration in the periphery of the diffuser, even if it is touched, it forms a rapidly rising stream of water with a drop of surplus air supplied to the water and rises to the check bed. As it spreads, the water pressure acting on the water disappears, so that the oxygen solubility is restored to the condition under atmospheric pressure, and the excess dissolved oxygen is reduced back to the atmosphere. Since the advantageous effects of increasing the solubility of oxygen under a relatively high pressure for the same reason are canceled out, a method of supplying air to a deep water body is practically avoided.

The background art of this invention is disclosed by the following patent document.

-Republic of Korea Utility Model Registration No. 20-0272578 (2002.04.18)

-Republic of Korea Patent Publication No. 10-0394995 (2003.08.19)

-Republic of Korea Patent Publication No. 10-0699931 (2007.03.28)

-Republic of Korea Patent Publication No. 10-0941191 (2010.02.05)

The present invention has been made in order to solve the above problems, by circulating the upper portion of the water body to form the oxygen dissolved water while circulating to the bottom, not only can easily supply the dissolved oxygen in deep water, In addition, it is possible to generate a high concentration of oxygen dissolved water even when supplying a relatively low pressure air bubble, providing an oxygen supply device in the body that can improve the economics and efficiency of water purification system, fish farming system, etc. The purpose is to.

Oxygen supply device in the water body according to the present invention for realizing the above technical problem, the bubble mixed water induction pipe connecting the upper and lower parts of the water body constituting the water circulation pipe; A bubble mixed water transfer means configured to flow on the water of the upper part of the water body through the bubble mixed water induction pipe toward the lower part of the water body through the bubble mixed water induction pipe; Air supply means connected to a pipe of the bubble mixing water induction pipe to supply air; Air bubble removing means connected to an end of the bubble mixed water induction pipe to separate and remove air bubbles remaining in the bubble mixed water from the bubble mixed water induction pipe; An oxygen-dissolved water discharge pipe connected to the air bubble removing means and discharging water passing through the air bubble removing means toward the lower portion of the water body and constituting the water circulation pipe together with the bubble mixed water induction pipe; Removal means may be provided with an air outlet in the upper portion may be configured to remove the separated air bubble to the outside of the water circulation pipe through the air outlet.

The air bubble removing means may be configured to separate and remove the air bubbles in a hydrocyclone manner.

The air bubble removing means is formed in a cylindrical structure, the bubble mixed water induction pipe is connected to the upper one side, the oxygen dissolved water discharge pipe is connected to the lower one side, the air is discharged air separated in the upper center The discharge pipe can be connected.

The bubble mixed water induction pipe may be configured to be connected inside the water body.

Alternatively, the bubble mixed water induction pipe may be configured to be connected to the outside of the water body.

Fluid bubble reference means for disturbing the flow of the fluid may be provided inside the bubble mixing water induction pipe.

The bubble mixed water induction pipe may be connected to a raw water inlet pipe for supplying raw water from the outside of the water body, and may be provided with a treated water discharge pipe for discharging water on an upper side of the water reservoir in which the water body is stored.

In the water body oxygen supply apparatus according to the present invention, the supply of dissolved oxygen by contacting water and air in a deep water body not only increases the oxygen molecular density in the air bubble by water pressure but also saturates solubility in proportion to the water pressure. Since it increases the rate of dissolution of oxygen to increase the efficiency of the device, thereby maintaining a higher oxygen concentration in the water can increase the activity of aerobic life in the water there are many advantages of the advantageous aspects.

In addition, by injecting a relatively low-pressure air bubble into the water to move to a deeper depth, and through this process dissolved in the water to prevent the water-dissolved mass easily dissolved in the upper part of the body of water It provides an economical and efficient oxygen supply that maintains high oxygen concentrations.

As a result, the present invention not only can easily supply dissolved oxygen in the deep water, but also can generate high concentration of oxygen dissolved water even when supplying air bubbles of relatively low pressure, and thus, the high concentration of dissolved oxygen Since the water does not easily rise to the surface of the water and fills up from the bottom of the water body, there is an effect of improving the aerobic biological conditions inside the water body at low cost.

1 is a block diagram showing the oxygen supply apparatus in the water body of the prior art.

2 is a block diagram showing an oxygen supply apparatus in a water body according to the first embodiment of the present invention.

3 is a block diagram showing an oxygen supply apparatus in a water body according to a second embodiment of the present invention.

4 is a block diagram showing an oxygen supply apparatus in a water body according to a third embodiment of the present invention.

5 is a perspective view showing a hydrocyclone air bubble removing means configured in the oxygen supply apparatus in the water body according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

The apparatus for supplying oxygen in a water body according to the present invention relates to an apparatus for supplying dissolved oxygen economically to a water body requiring an aerobic state, and a first embodiment of the present invention assuming a case in which dissolved oxygen is supplied to a simple water tank. Referring to Figure 2 the structure and operation of the apparatus according to the following.

2, the oxygen supply apparatus in the water body according to the first embodiment of the present invention, by connecting the upper and lower parts of the water body to the bubble mixed water induction pipe 20 to allow the upper side of the water flow to the lower side (20) ) And the bubble mixed water induction pipe connected to the pipe of the bubble mixed water induction pipe 20 and supplied with air or oxygen from the atmosphere to the inside of the bubble mixed water induction pipe 20 to introduce water from the upper side of the water body. Air supply means 10 for forming bubbles in the inside of the bubble, and bubble mixed water conveying means for forcibly flowing the bubble mixed water in the bubble mixed water induction pipe 20 from the top to the bottom (that is, downstream) (25), air bubble removing means (30) connected to the distal end of the conduit of the bubble mixing water induction pipe (20), and oxygen dissolved water discharge pipe (40) connected to the air bubble removing means (30).

In the above, the bubble mixed water refers to water in which air bubbles are dispersed and mixed.

In FIG. 2, reference numeral 60 denotes a water container in which the water body is stored, and the size and shape of the water container 60 may be variously modified according to the implementation conditions, and in the drawing, the water container 60 may have a container shape. Although it is shown that the water container 60 is not necessarily limited thereto, any structure or storage area capable of storing conventional water bodies such as biological reaction tanks, fish farming tanks, artificial lakes, natural lakes, etc. to purify sewage or waste water, etc. Of course, it may include.

The main components of the oxygen supply apparatus in the water body according to the first embodiment of the present invention as described above will be described in detail.

In the bubble mixed water induction pipe 20, the water inlet 21 is preferably disposed at a position close to the upper layer of the water body. In the bubble mixed water induction pipe (20), the fluid to induce a smooth mixing of the water introduced through the water inlet (21) and the air introduced by the air supply means 10 in the bubble mixed water induction pipe (20) Disturbing means 22 may be provided. The fluid disturbing means 22 may include a configuration in which the inside of the bubble mixing water induction pipe 20 is formed in the form of a corrugated pipe so that vortices can be formed in the bubble mixing water induction pipe 20, and the bubble mixing water induction is induced. The tube 20 may include at least one or more baffles provided at a predetermined position in the bubble mixing water induction tube 20 so that irregular flow may be formed.

The bubble mixed water induction pipe 20 is configured to be connected to the outside of the water body. That is, it is configured to be connected to the upper and lower side of the water container 60 from the outside of the water container 60. Of course, the air supply means 10, the bubble mixed water conveying means 25, the air bubble removing means 30, etc., which are connected to the bubble mixed water induction pipe, are also configured outside the water container 60.

Next, the air supply means 10 may be a blower driven by an electric motor, and an air diffuser 12 may be mounted at an end thereof. Since the air discharge part 12 is located closer to the upper layer of the water body can lower the load of the air supply means 10 is preferably located on the upper side of the bubble mixing water induction pipe 20.

In addition, the air supply means 10 is not limited to providing general air (air in air), but may be configured to be connected to an oxygen supply tank or the like to supply oxygen.

Next, the bubble mixed water transfer means 25 is a means capable of forcibly flowing water in the bubble mixed water induction pipe 20 in a downward direction, and may be a pump or a spiral propeller driven by an electric motor. Located in the rear side of the unit 12, the water flowing through the air inlet 21 of the bubble and the bubble mixed water induction pipe 20 is formed through the air outlet 12, the bubble mixed water induction pipe ( 20 is preferably configured to be forced to the downward direction. In addition, the bubble mixed water conveying means 25 is a unitary power unit that sucks air and mixes it with water to force flow downward, that is, the air supply means 10 and the bubble mixed water conveying means 25. It may be. In addition, the bubble mixed water transfer means 25 is connected to the bubble mixed water induction pipe 20 in the form of a venturi tube, it is also possible to be configured to suck the air using the pressure difference.

Next, the air bubble removing means 30 is a device for separating the air bubbles remaining in the water (see reference numeral 33 in FIG. 2) into the upper layer, and changes the flow rates of the water and the air bubble mixture that are introduced into the water. The device for separating air can be in the form of a cylindrical so-called hydrocyclone. Referring to FIG. 5, the air bubble removing unit 30 is formed in a cylindrical structure, and the bubble mixing water induction pipe 20 is connected to one upper side thereof, and the oxygen dissolved water discharge pipe 40 is connected to one lower side thereof. An air outlet 30a is provided at the center of the upper side, and the air outlet 30a guides and removes the air bubble separated by the hydrocyclone method to the outside of the water body via the air outlet 30a. ) Is preferably configured to be connected.

The air bubble removing means 30 is configured such that the water flowing through the inlet (bubble mixed water induction pipe 20 is connected) provided in the tangential direction on the outer wall of the cylinder is turned inside the cylinder and discharged to the outside of the cylinder. In the process of being connected to the oxygen dissolved water discharge pipe 40, the air bubbles are easily collected in the center of the swirl flow, so that the air is discharged through the air discharge pipe 31 and the flow control valve 32 provided at the top. It is preferred to be configured.

Here, since water may be mixed with air through the air outlet 30a and the air discharge pipe 31 to be discharged, the air discharge pipe 31 may be easily recovered to discharge the water discharged through the air discharge pipe 31. It is preferable that the upper end portion is configured in a curved structure so as to face the lower side (that is, the water body side), and the flow rate control valve 32 may be configured on the conduit so as to adjust the discharge air amount according to the implementation condition.

Next, the oxygen-dissolved water discharge pipe 40 is preferably arranged to have a lower portion of the water body and to have one or more discharge ports 41. At the end of each discharge port 41 may be configured to include a water dispersing means 42, such as a collision plate.

The oxygen dissolved water discharge pipe 40 serves to discharge the dissolved oxygen water passing through the air bubble removing means 30 to various places of the lower part of the water body.

Referring to the operation of the oxygen supply apparatus in the water body according to the first embodiment of the present invention configured as described above are as follows.

When the bubble mixed water conveying means 25 is operated, the water in the upper layer of the water body flows into the bubble mixed water induction pipe 20 through the water inlet 21, moves downward along the pipeline, and finally at the bottom of the water body. It is discharged to the lower part of the body through the discharge port 41 disposed. In addition, the air introduced into the bubble mixed water induction pipe 20 through the air supply means 10 and the air discharge unit 12 forms bubbles and flows together with the water in the bubble mixed water induction pipe 20. do.

In this flow process, the oxygen in the bubble is dissolved in the water, and as the pressure goes down toward the lower portion, the saturation solubility of the oxygen increases, so that the larger amount of oxygen melts. The bubble mixed water in which oxygen is dissolved as much as possible flows into the air bubble removing means 30, and the remaining air bubbles are provided in the air discharge pipe 31 and the flow control valve 32 provided on the air bubble removing means 30. The oxygen-dissolved water that is discharged through), and the bubble is removed, flows out through the outlet 41 of the lower part of the water body as described above, and continues to flow back into the water inlet 21 to circulate.

At this time, the water dispersing means 42 is installed at the rear end of the discharge port 41 so that the new inflow water having high oxygen solubility spreads in the lower part of the water body, pushing the existing water upwards, and old and oxygen-consumed water. This flows back into the bubble mixed water induction pipe 20 through the water inlet 21 to be circulated and processed.

Here, since the air bubble removing means 30 separates the air bubbles remaining in the bubble mixture water and removes the air bubbles to the outside, the first embodiment of the present invention, together with the oxygen dissolved water in a state that the bubble mixture contains air bubbles When it flows into the lower part of the water body, the dissolved oxygen which forms a stream of water that rises rapidly in the water body, and the oxygen dissolved water reaches the water surface 61 from the lower side of the water body for a short time is changed to the supersaturated dissolved state. It is possible to prevent the phenomenon of rapidly reducing into the atmosphere, thereby maintaining a high dissolved oxygen concentration inside the water body.

The apparatus for supplying oxygen in a water body according to the second embodiment of the present invention is an example of application to a fish tank for aquaculture, and includes a bubble mixing water induction pipe 20, an air bubble removing means 30, and an apparatus attached thereto. It is configured differently from the configuration of the first embodiment of the present invention described above in that they are installed inside the water body, that is, inside the water container 60.

Bubble mixing water induction pipe 20, the air bubble removing means 30 and the apparatuses attached thereto are the same as the configuration of the first embodiment of the present invention described above only in the installation position Since the same reference numerals are used, detailed descriptions of the respective components will be omitted. In addition, since the other components may be configured identically or similarly to the configuration of the first embodiment of the present invention and the operation may be the same, the same reference numerals are given, and repeated description thereof will be omitted.

On the other hand, in the case of applying to the fish culture tank as in the present embodiment as shown in the first embodiment of the present invention, the bubble mixing water guide pipe 20, air bubble removing means 30, etc. It can also be installed outside.

The oxygen supply apparatus in the water body according to the third embodiment of the present invention illustrates the case where it is applied to a biological reaction tank of a sewage (or wastewater) treatment plant, and in the main components of the first embodiment of the present invention, The raw water inlet pipe 51 supplied to the reaction tank 60a is connected to the bubble mixed water induction pipe 20, and the treated water outlet pipe 52 is connected to the outside of the biological reactor 60a, and the microorganism is The carrier 54 is further configured inside the biological reactor 60a.

Here, the raw water inlet pipe 51 is connected to supply the raw water from the upper side of the bubble mixed water induction pipe 20, the treated water discharge pipe 52 is on the upper side of the biological reaction tank (60a) which is a water reservoir in which the water body is stored. It is preferable to be connected and configured in the form of an overflow tube.

The raw water inlet pipe 51, the treated water outlet pipe 52, and the water inlet port 21 may be configured by variously changing their positions.

4 illustrates the case in which the microbial carriers 54 are connected to each other by a string, and the present invention is not limited thereto, and may be configured in various other forms and arrangements by applying a known microbial carrier installation method. In some cases, it is also possible to omit the installation of the carrier, and instead, to separate the microorganism activated sludge in the effluent treatment water, and to circulate and recirculate the biological reactor 60a. For reference, in FIG. 4, only one line is schematically illustrated as a configuration of the microbial carrier 54.

On the other hand, the biological reaction tank (60a) may be configured to form the entire or part of the bottom surface in the shape of an inclined funnel, to connect the precipitate discharge pipe to it, to discharge the material precipitated on the floor.

Since the other components are the same as or similar to the configuration of the first embodiment of the present invention described above, the same reference numerals are given, and repeated description thereof will be omitted.

Referring to the operation of the oxygen supply apparatus in the water body according to the third embodiment of the present invention configured as described above are as follows.

When the bubble mixed water transfer means 25 is operated, water in the upper portion of the biological reaction tank 60a is introduced into the bubble mixed water induction pipe 20 through the water inlet 21. In addition, when the raw water is introduced through the raw water inlet pipe 51, raw water is also introduced into the bubble mixed water induction pipe 20.

Thereafter, as in the first embodiment of the present invention described above through the bubble mixed water induction pipe 20 and the air bubble removing means 30 through the discharge port 41 is open through the discharge port 41 in the lower body of the biological Dissolved oxygen is supplied to the inside of the reaction tank 60a to purify the water quality, and a quantity of water that balances the inflow of the raw water through the raw water inlet pipe 51 is passed through the biological water tank through the treated water outlet pipe 52 ( Out of 60a).

At this time, the oxygen concentration in the biological reaction tank (60a) may be maintained at an arbitrary level by adjusting the specifications and operating capacity of the air supply means 10 and the bubble mixed water transfer means (25).

In addition, in the present embodiment, the amount of oxygen supplied through the discharge port 41 in the biological reactor 60a is controlled (mainly lowered), thereby maintaining the upper portion of the biological reactor 60a in an oxygen-deficient empty oxygen-free or anaerobic state. Decomposition may be induced to cause the sewage to be treated to sequentially go through anaerobic decomposition of the upper part together with aerobic decomposition of the lower part in one reactor, thereby obtaining an effect of removing nitrogen components from the water.

In addition, the biological treatment process may be performed while continuously passing through the plurality of biological reaction vessels 60a, instead of using one biological reaction vessel 60a.

Claims

A bubble mixing water induction pipe connecting the upper and lower parts of the water body and constituting the water circulation pipe;

A bubble mixed water transfer means configured to flow on the water of the upper part of the water body through the bubble mixed water induction pipe toward the lower part of the water body through the bubble mixed water induction pipe;

Air supply means connected to a pipe of the bubble mixing water induction pipe to supply air;

Air bubble removing means connected to an end of the bubble mixed water induction pipe to separate and remove air bubbles remaining in the bubble mixed water from the bubble mixed water induction pipe;

And an oxygen-dissolved water discharge pipe connected to the air bubble removing means to discharge water passing through the air bubble removing means toward the lower portion of the water body and together with the bubble mixed water induction pipe to constitute the water circulation pipe.

The air bubble removing means is provided with an air outlet at the top to remove the separated air bubble to the outside of the water circulation pipe through the air outlet,

Oxygen supply in the body of water.
The method according to claim 1,

The air bubble removing means is configured to remove the air bubbles in a hydrocyclone method, the oxygen supply device in the water body.
The method according to claim 2,

The air bubble removing means is formed in a cylindrical structure, the bubble mixing water induction pipe is connected to the upper outer wall in the tangential direction, the oxygen dissolved water discharge pipe is connected to the lower outer wall in the tangential direction, the air outlet of the upper center The oxygen supply apparatus in the water body, characterized in that the air discharge pipe for inducing, removing the separated air bubble through the air outlet to the outside of the water body is connected.
The method according to claim 3,

The air discharge pipe has an oxygen supply apparatus in the water body, characterized in that the outlet of the end toward the water body structure.
The method according to any one of claims 1 to 4,

The bubble mixing water induction pipe is an oxygen supply apparatus in the water body, characterized in that configured to be connected via the inside of the water body or the outside of the water body.
The method according to any one of claims 1 to 4,

Intra-body oxygen supply apparatus, characterized in that the inside of the bubble mixing water induction pipe is provided with fluid disturbance means for disturbing the flow of the fluid.
The method according to any one of claims 1 to 4,

The bubble mixed water induction pipe is connected to the raw water inlet pipe for supplying raw water from the outside of the water body,

The upper one side of the water reservoir in which the water body is stored, the oxygen supply device in the water body, characterized in that the treated water discharge pipe for discharging water.