KR102341220B1 - Water purification system in stagnant waters through supply of dissolved oxygen - Google Patents

Abstract

The present invention relates to a water purification system in stagnant water areas through the supply of dissolved oxygen. More specifically, the present invention comprises: a main body which includes an inlet space therein, an upper-end part installed adjacent to the water surface, and a lower-end part opened and installed so as to be located at a bottom part of a water area; and at least one oxygen supply device which includes an inlet pipe part positioned in the inlet space of the main body and having a fluid inlet hole formed at a lower end thereof, a vortex forming pipe part communicating with an upper end of the inlet pipe part and extending from the upper end and bent to comprise a bent part having an outlet provided at one end, an inducing pipe part having a side communicating with the outlet of the bent part, an upper end exposed over the surface of the water in relation to a center of the communicating part, and a lower end positioned below the surface of the water, and an oxygen supply part supplying air by communicating with the inducing pipe part through an air supply line. The present invention is to improve poor oxygenation at the bottom of the lake and directly supply oxygenated water to the bottom of the lake stratified by the thermocline.

Description

Water purification system in stagnant waters through supply of dissolved oxygen

The present invention generates microbubble water in which oxygen is dissolved while allowing water located at the bottom of stagnant waters such as lakes and dams to flow in with little energy and provides dissolved oxygen supply that can be easily supplied into stagnant waters. it's about

The deterioration of water quality in 'closed waters' such as lakes, dams and reservoirs is an environmental problem that is difficult to improve, and due to the construction of many dams, closed waters are formed in dams even in rivers. It is difficult and generally eutrophication proceeds easily because substances that are pollutants such as nitrogen and phosphorus tend to accumulate.

When organic matter (COD) accumulates at the bottom of a lake or dam, when microorganisms consume this organic matter, oxygen is also consumed at the same time, so it is a condition for oxygen deficiency. And because of stratification, the dissolved oxygen concentration (DO) at the bottom of the lake becomes almost 0 mg/L during the stratification period, and hypoxia at the bottom of the lake promotes the elution of phosphorus from the bottom of the lake, leading to mass generation of algae, etc. Therefore, improvement of hypoxia at the bottom of lakes is a very important technique for water quality purification of closed waters represented by lakes and dams.

In the case of hypoxia at the bottom of the lake, phosphate ions (PO43-) are eluted from the bottom of the lake and ferric ions (Fe2+) are eluted at the same time. When anaerobic conditions are achieved by hypoxia, phosphate ions and ferric ions are not fixed and elution occurs as the bottom of the lake is reduced.

In lakes, swamps, or dams where eutrophication has progressed, phosphorus elution and fixation are repeated at the bottom of the lake, and a continuous vicious cycle occurs due to eutrophication.

By aerobizing the lake mud, the elution of phosphorus from the lake can be prevented, and the activity of anaerobic microorganisms that generate methane or hydrogen sulfide can also be suppressed, thereby preventing the generation of harmful gases. When the aerobic microorganisms in the journey are activated, the ecosystem in the water body can be restored and eutrophication of lakes, swamps and dams can be prevented.

So, in the prior art, there are aeration circulation method and deep aeration method as the most widely used technologies for improving the hypoxia of porcupines in lakes, swamps, and dams.

In the aeration circulation method and deep aeration method, compressed air is sent to the lower layers of lakes and dams to raise the water in the deep layers, dissolving oxygen in the bottom layers, and at the same time, some of the oxygenated water is mixed with the water in the upper layers. It is a method of aerobizing the bottom of the lake as it circulates to the bottom of the

However, this conventional technique has the problem of increasing the pollution level of the lake by mixing the anaerobic water at the bottom or the water from which phosphate ions are eluted with the entire lake, and at the same time, the water in the upper part of the lake supplied with oxygen has a high water temperature and falls stably to the bottom of the lake. There is a problem that doesn't go away.

As another example, in some countries, a method of supplying oxygen without destroying the lake stratification by improving the aeration circulation method or deep aeration problem has been proposed, which is a bar that provides oxygen water directly to the bottom of the lake stratified by the thermo-weak layer. As a method of supplying water, high-concentration oxygenated water is supplied to the bottom of the lake by using a system that supplies pure oxygen to an oxygen dissolving device using a pressurized tank or a submersible pump at the bottom of the lake.

However, this conventional technique can reliably supply high-concentration oxygen water to the bottom of the lake and prevent the elution of phosphate ions or iron ions. There is a disadvantage that a considerable amount of energy is required for the manufacture and supply of PSA (pressure swing adsorption method) or oxygen cylinder.

In addition, as another existing example, there is a method of supplying oxygen to the bottom of the dam using microbubbles. This is a method of increasing the dissolved oxygen concentration by generating microbubbles at the bottom of the lake, but even if there are microbubbles, the bubbles themselves float and there is a possibility that the microbubbles themselves may adversely affect the aquatic ecosystem.

Republic of Korea Patent Registration No. 10-0830216

Therefore, it is an object of the present invention to supply oxygen to the water located at the bottom of the stagnant waters to flow into the stagnant waters, improve poor oxygenation at the bottom of the lake, and directly supply oxygenated water to the bottom of the lake stratified by the thermo-weak layer, thereby reducing energy consumption. The goal is to provide a water purification system for stagnant waters through the supply of dissolved oxygen that can easily supply oxygen in stagnant waters even with the use of

As a means for achieving the above object, the stagnant water purification system through the supply of dissolved oxygen of the present invention (hereinafter referred to as the 'system of the present invention') is provided with an inflow space inside and installed so that the upper end is adjacent to the water surface and a main body installed so as to be positioned at the bottom of the body of water while the lower end thereof is opened; And a vortex forming pipe part including an inlet pipe part located in the inlet space of the main body and having a fluid inlet hole formed at the lower end, and a bent part communicating with the upper end of the inlet pipe part and extending from the upper end to provide an outlet at one end, and the bent At least one oxygen including an air inlet part communicating with the outlet of the part through an air injection line and communicating with the inlet pipe part through an air injection line, the outlet of the part is communicated on the side, the upper end is exposed above the water surface around the communicating part, and the lower end is located below the water surface It is characterized in that it includes a supply device.

As an example, the perforated plate on which a plurality of perforations are formed is stacked at the lower end of the vortex forming pipe part or the induction pipe part, and it is characterized in that the upper and lower perforations are formed in a zigzag manner.

As an example, the perforated plate is characterized in that a thread is formed on the inner periphery of the perforated plate.

As an example, in the perforated plate, the screw threads of the perforated adjacent up and down or front and back are characterized in that the rotation direction is opposite to each other.

As an example, the perforation of the perforated plate is characterized in that it is configured to have at least two or more different diameters.

As an example, the vortex-forming tube portion is characterized in that it includes a plurality of vortex-forming rods having threads formed on the outer periphery while radially protruding from the upper or lower portion of the perforated plate toward the centripetal direction.

As an example, between the perforated plate is characterized in that the sludge cutting port comprising a central pipe and a plurality of cutting blades protruding radially from the central pipe is further included.

As described above, the system of the present invention can generate microbubble water in which oxygen is dissolved by pulling up to the water at the bottom of the water body with little energy while floating in stationary waters such as lakes and dams. In the process of passing through the vortex-forming pipe section in which a plurality of perforated plates are stacked, collision with air and vortex are induced, so that uniform generation of microbubbles and the efficiency of generating microbubbles can be further maximized.

1 is a side cross-sectional view showing a basic example of the system of the present invention;
Figure 2a is a side view showing an oxygen supply device according to an embodiment of the present invention.
Figure 2b is a side view showing an example in which the perforated plate is installed at the lower end of the guide tube in the oxygen supply device of the present invention.
Figure 3 is an operating state diagram of the perforated plate according to an embodiment of the present invention.
Figure 4 is a perspective view showing an embodiment of the perforated plate in the present invention.
5A and 5B are operational state diagrams showing a main mechanism for causing a collision between vortexes in the embodiment shown in FIG. 4;
Figure 6 is an operation state diagram showing another embodiment of the perforated plate in the present invention.
7 is an operation state diagram of an oxygen supply device according to an embodiment of the present invention.
8 is a partial side cross-sectional view showing an oxygen supply device according to another embodiment of the present invention.
9 is a side cross-sectional view showing an example in which the sludge incision hole is further included in the perforated plate.

In describing the present invention, the terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her invention. It should be interpreted as meaning and concept consistent with the technical idea of

Referring to FIG. 1, the system of the present invention supplies oxygen to a stationary body of water including a lake, and in particular, smoothly raises water at the bottom of a stationary body to dissolve oxygen, and then flows back into the stationary body. has

Specifically, the system of the present invention includes one or more oxygen supply devices 1 for generating microbubble water in which oxygen is dissolved in the incoming raw water, and the one or more oxygen supply devices 1 while accommodating the one or more oxygen supply devices 1 to supply water from the bottom of the stagnant water to the oxygen. and a main body 6 that allows it to flow into the supply device 1 and supplies the microbubble water generated in the oxygen supply device 1 to another location in the body of water.

First, as shown in FIG. 2A , the oxygen supply device 1 includes an inlet pipe part 2 positioned in the inlet space 60 of the main body 6 and having a fluid inlet hole 21 formed at the lower end thereof, and the inlet pipe part (2) communicating with the upper end of the vortex forming pipe portion 3 including a bent portion 30 that is bent while extending from the upper end to provide an outlet 300 at one end, and the outlet 300 of the bent portion 30 is communicated to the side, and the upper end is exposed above the water surface around the communication part, and the lower end is communicated through the air injection line 50 to the induction pipe part 4 and the inlet pipe part 4 located below the water surface to inject air It is configured to include an injection unit (5).

The inlet pipe part 2 has a tubular shape having an internal space 20, and a fluid inlet hole 21 is formed at the lower end so that raw water W1 is introduced, and an upward flow of the introduced raw water W1 is made.

At this time, the inlet pipe part 2 is located in the inlet space 60 of the main body 6 , and the raw water W1 is water of a stagnant water that is introduced through the inlet space 60 of the main body 6 . In particular, according to the structure of the body 6 of the present invention, it may be water from the bottom of the stagnant water body.

An air injection line 50 communicates with any one of the side surfaces of the inlet pipe 2, and the air (a) provided from the air injection unit 5 is injected into the internal space 20, so that the inflow raw water W1 is Allow air (a) to melt.

Here, the injected air is preferably compressed air, and it is preferable that an air diffuser is provided at the end of the air injection line 50 communicating with the inlet pipe 2 so that air in the form of bubbles is directly injected.

As the air (a) is supplied into the inlet pipe part 2 through the air injection line 50, the raw water W1 inside the inlet pipe part 2 generates a force that rises as the air (a) dissolves and In addition, as the specific gravity of the raw water W1 decreases, the fluid inside the inlet pipe 2 rises upward by an amount corresponding to the specific gravity difference with the fluid outside the inflow pipe 2 .

Therefore, the raw water W1 flows into the inside of the inlet pipe part 2 without the operation of a separate suction pump, and the raw water W1 moves upwards. This will lead to energy savings.

On the other hand, in the oxygen supply device 1 of the present invention, as shown in FIGS. 2a and 2b, a perforated plate 31 having a plurality of perforations 311 formed at the lower end of the vortex forming pipe part 3 or the induction pipe part 4 It is characterized in that the perforations 311 facing upward and downward are formed in a zigzag pattern.

At this time, the perforated plate 31 is to induce the formation of a vortex with respect to the flowing fluid so that the number of microbubbles can be effectively generated. 31) will be described with reference to an example formed in the vortex forming tube portion 3 .

The vortex forming pipe part 3 is configured to communicate with the upper end of the inlet pipe part 2, and a perforated plate 31 on which a plurality of perforated holes 311 are formed is stacked. The upper and lower perforations 311 are configured to be arranged in a zigzag manner.

The air (a) injected in the form of bubbles together with the raw water (W1) moving upward in the inner space (20) of the inlet pipe part (2) is introduced into the vortex forming pipe part (3).

That is, the vortex forming pipe part 3 is such that the upwardly moving raw water W1 and air a are introduced together and pass through the perforated holes 311 of the plurality of perforated plates 31, as shown in FIG. By making the perforated hole 311 to be formed in a zigzag pattern, the raw water W1 and air (a) passing through the lower perforated hole 311 collide with the adjacent upper perforated plate 311 body to be guided to the perforated 311. .

In this process, repeated collisions and vortices are formed between the raw water (W1) and the air (a), and as the collisions and frictions between the vortexes are maximized by the collisions and vortices formed in a plurality of places, the raw water (W1) and the air (a) is to generate the mixed number of microbubbles (W2) and to double the refinement efficiency.

Preferably, a screw thread 311-1 is formed on the inner periphery of the perforated hole 311, so that a vortex is automatically formed on the screw thread 311-1 in the process of passing the fluid through the perforation 311, thereby reducing efficiency of refinement. Let this be multiplied even more.

And in the oxygen supply device 1, the thread 311-1 is configured in the perforation 311, but as mentioned above, a representative embodiment for maximizing the collision and friction between vortexes is shown in FIGS. 5A to 6 is being presented

First, the embodiment presented in FIG. 5A is characterized in that a plurality of the perforated plates 31 are stacked, and the perforated plates 31 to be stacked are arranged in a shape in which the upper and lower perforated holes 311 are crossed.

By this configuration, as shown in the drawing, the vortex S1 formed while passing through the perforated hole 311 located at the lower portion collides with the perforated hole 311 body located at the upper portion and is guided into the perforation 311, and , so that another vortex (S2) is formed in the upper perforation (311). That is, a plurality of vortex currents S1 and S2 are formed upward and downward, and a collision of the vortex currents S1 is formed to maximize collision and friction between the vortex currents.

In addition to this, as shown in FIG. 6 , the perforations 311 constituting the perforated plate 31 are configured to have at least two or more different diameters so that the pressure in the vortex fluctuates to double the miniaturization.

As an example, the diameter (d2) of the perforated plate (31) constituting the perforated plate (31) positioned at the lower portion is larger than the diameter (d1) of the perforated (311) constituting the perforated plate (31) positioned at the upper portion. As the diameter of the vortex (S1, S2) formed with the arrangement structure in which the downwardly facing perforations 311 intersect is changed, the pressure fluctuation is induced to further double the miniaturization.

On the other hand, the embodiment presented in FIG. 5B is characterized in that the direction of the thread 311-1 of the perforated hole 311 constituting the perforated plate 31 is arranged differently. For example, in the perforated plate 31 , the threads 311-1 of the perforated holes 311 adjacent to each other up and down or forward and backward are configured such that the rotational directions are opposite to each other.

That is, as shown in Fig. 5b, the direction of the screw thread 311-1 in the adjacent perforation 311 is arranged to be opposite, and the vortex S1 and S2 generated from each perforation 311 rotates in the opposite direction. It is to make the mixing between the raw water W1 and the air a as well as to make the refinement more effective by inducing greater collision and friction between rotations.

The vortex forming pipe part 3 may include a bent part 30 extending from the upper end of the uppermost perforated plate 31 and being bent to provide an outlet 300 at one end. For example, the bent part 30 may have an elbow shape.

As shown in FIG. 7 , the outlet 300 of the bent part 30 communicates with the guide pipe part 4 through a coupling on the side thereof, and the upper end is stagnant around the communication part and is exposed above the water surface. and placed so that the lower end is located below the water surface.

That is, the guide tube portion 4 has a 'L'-shaped tube structure, and the upper end protrudes above the water surface and the lower end is located below the water surface, so that the number of microbubbles generated and moved from the vortex forming tube portion 3 (W2) ) to flow smoothly from below the surface to near the surface.

As described above, in the guide pipe part 4, the microbubble water W2 in which the raw water W1 and the air a are mixed by the air (a) injection of the air injection part 6 is generated from the vortex forming pipe part 3 as described above. It overflows and flows in, and as the number of microbubbles (W2) overflows, a very thin bubble film is created at the upper end exposed above the water surface, thereby remarkably increasing the contact with the air present in the atmosphere.

At this time, the thickness of the above-mentioned bubble membrane is irradiated to be about 100 μm to 200 μm, and degassing of unnecessary gases such as hydrogen sulfide and ammonia dissolved in water is performed in the bubble membrane, and at the same time, oxygen in the atmosphere is instantaneously caused by phase equilibrium. As it melts, the solubility of oxygen in the microbubble water W2 can be further improved, thereby reducing the energy required for air injection of the air injection unit 5 .

Meanwhile, in the present invention, an embodiment in which the miniaturization efficiency is further doubled by forming a three-dimensional vortex is shown in FIG. 8 .

In this embodiment, the vortex-forming pipe part 3 has a plurality of vortex-forming rods 35 which protrude in a centripetal direction on the upper or lower part of the perforated plate 31 and have a screw thread 351 on the outer periphery. It is characterized in that it is composed.

Although the figure shows an example in which the vortex forming rod 35 is configured on the upper part of the perforated plate 31, it may be configured at the lower part and may be formed while crossing up and down.

The reason why the vortex-forming rod 35 is formed in this way is that a plurality of longitudinal vortexes are formed while passing through the perforated plate 31 as shown in the figure, and the longitudinal vortex collides with the plurality of vortex-forming rods 35 in the transverse direction. A vortex is formed, and as the longitudinal vortex and the lateral vortex collide with each other, the refining efficiency of the raw water W1 and the air (a) is further doubled.

That is, as a plurality of vortices are formed in the longitudinal and transverse directions, a vortex is formed more three-dimensionally, and collisions and friction are induced in multiple directions. This will further double the miniaturization efficiency of

On the other hand, as described above, since it is necessary to position the oxygen supply device 1 close to the water surface of the static water body, in the system of the present invention, as shown in FIG. (1) presents an example of fixed installation.

Specifically, the main body 6 is provided with an inflow space 60 therein, the upper end is installed adjacent to the water surface, and the lower end is opened and installed so as to be located at the bottom of the body of water.

One or more oxygen supplying devices 1 may be installed in the main body 6 . As shown in FIG. 1 , two oxygen supplying devices 1 pass through the upper end of the body 6 and the inlet pipe part 2 ) and a part of the vortex forming tube part 3 are illustrated in an example in which the main body 6 is located in the inflow space 60, but the present invention is not limited thereto.

The lower end of the body 6 may be directly located at the bottom of the static water body, and an extension pipe installed to be located at the bottom of the water body may be connected.

In addition, although the main body 6 is not shown in the drawings, it is preferable that one or more buoyancy spheres are installed so that the upper end can be adjacent to the water surface in response to changes in the water level of the water body.

As mentioned above, the inlet pipe part 2 of the oxygen supply device 1 is located in the inlet space 60 of the main body 6, so that raw water existing in the inlet space 60, that is, water flowing in from the bottom of the body of water is upward. The flow is induced, and since the lower end of the guide tube 4 is located below the water surface from the outside of the main body 6, the microbubble water W2 flowing from the guide tube 4 is directly supplied into the water body.

As such, the system of the present invention can provide aeration through the air injection unit 5 at a very shallow water depth of about 15 cm, so that it can supply a large amount of oxygen by raising the water from the bottom of the stagnant water area with very little energy.

In addition, since the oxygen supply device 1 can be installed in the main body 6 installed adjacent to the water surface, the same oxygen supply effect can be obtained without change in power consumption regardless of the depth of the water.

As a result of the test, it was confirmed that there was no change in water flow and oxygen supply performance even when tested to a depth of 40 m, and oxygen could be supplied without destroying the stratification of stagnant waters such as lakes or dams, such as deep aeration.

The system of the present invention can change the installation location according to the size of the dam or the method to be circulated in the case of a water body in which a lake is formed by a dam, and, as an example, converts the low oxygen water in the deep part near the dam to the lake at the upper part of the dam. Oxygen is sufficiently supplied while being transported, and this oxygen-supplied water can be moved to the dam by riding on the bottom of the dam due to the temperature difference.

Meanwhile, in the present invention, as shown in FIG. 9 , a sludge incision port 32 including a central pipe 321 between the perforated plate 31 and a plurality of cutting blades 322 protruding radially from the central pipe 321 . An example in which is further included is shown.

That is, the sludge incision port 32 is placed between the perforated plates 31, and the sludge opening 32 separates the upper and lower perforated plates 31 while pulverizing the sludge mixed in the fluid passing through the perforated plate 31. This is to increase the sludge removal efficiency and to control the sludge deposition in the perforations 311 and the like.

The sludge passing through the perforated plate 31 is pulverized by the vortex and cut by the central pipe 321 and each cutting blade 322 to control the sludge deposition, and the central pipe 321 and cutting It is also possible to make water molecules and bubbles miniaturized even by collision with the wing 322 .

Preferably, the upper and lower sludge incision ports 32 are suitable for each cutting blade 322 to intersect.

Although preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

1: oxygen supply device 2: inlet pipe part
3: vortex forming pipe part 4: guide pipe part
5: air injection part 6: tank
21: fluid inlet hole 30: bent part
31: perforated plate 32: sludge incision hole
35: vortex forming rod 60: inflow space
311: perforation 311-1: thread

Claims (7)

a main body having an inflow space therein, the upper end being installed adjacent to the water surface, and the lower end being opened and positioned at the bottom of the water body; and
A vortex forming pipe part including an inlet pipe part located in the inlet space of the body and having a fluid inlet hole formed at the lower end, and a bent part communicating with the upper end of the inlet pipe part and extending from the upper end to provide an outlet at one end, and the bent part At least one oxygen supply including an air inlet part communicating with the inlet pipe part through an air injection line and an induction pipe part with the outlet communicating on the side, the upper part being exposed above the water surface, and the lower part being located below the water surface centering on the communicating part device; including;
A perforated plate on which a plurality of perforations are formed is stacked at the lower end of the vortex forming pipe part or the induction pipe part, and in the perforated plates adjacent to each other in the upper and lower directions, the perforations facing up and down are arranged in a zigzag manner, and a thread is formed on the inner periphery of the perforation The rotation direction of the screw thread of the adjacent perforated hole up and down or front and back is configured to be opposite to each other,
A sludge incision including a central pipe and a plurality of cutting blades projecting radially from the central pipe is installed between the perforated plates, and adjacent sludge incisions are configured such that each cutting blade crosses the upper and lower perforated plates while spaced apart from each other. Acts to pulverize the sludge mixed in the fluid that has passed through
The vortex-forming tube portion further includes a plurality of vortex-forming rods having threads formed on the outer periphery while radially protruding from the upper or lower part of the perforated plate in the centripetal direction, and the longitudinal vortex formed by the perforated plate is the vortex. A system for purifying water in stagnant waters through the supply of dissolved oxygen, characterized in that it collides with the formation rod to induce a vortex in the transverse direction.
delete delete delete The method of claim 1,
The system for purifying water in stagnant waters through the supply of dissolved oxygen, characterized in that the perforations of the perforated plate are configured to have at least two or more different diameters. delete delete

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