WO2013141597A1

WO2013141597A1 - Density current generating apparatus having mixing ratio adjusting function

Info

Publication number: WO2013141597A1
Application number: PCT/KR2013/002286
Authority: WO
Inventors: 안재순
Original assignee: 주식회사 평화개발
Priority date: 2012-03-21
Filing date: 2013-03-20
Publication date: 2013-09-26

Abstract

The present invention relates to a density current generating apparatus having a mixing ratio adjusting function, the apparatus comprising: a first guide pipe having a first water inlet port formed at an upper end thereof; a second guide pipe spaced apart from and connected to the first guide pipe, and having a second water inlet port formed at a lower end thereof; a discharge unit formed between the first guide pipe and the second guide pipe; a centrifugal impeller arranged inside the discharge unit; and at least one intake hose in communication with an outer surface of the first guide pipe or an outer surface of the second guide pipe.

Description

Density Flow Generator with Mixing Ratio Control

The present invention relates to a density flow generating device having a mixing ratio control function, and more particularly, a density flow having a mixing ratio control function capable of fundamentally improving water quality by circulating water in stagnant lakes or lotus roots and harbors. It relates to a generating device.

In coastal waters such as stagnant lakes, dams, and ports, water density changes due to temperature differences depending on the water depth, causing water circulation in the vertical direction, which causes self-cleaning.

However, due to the stratification occurring in summer or winter, the vertical circulation is lost, and thus the self-cleaning action is lost, causing severe water deterioration such as eutrophication, and thus the ecosystem is destroyed.

In particular, the summer stratification occurs because the deeper the water temperature, the lower the water temperature and the density increases. As shown in FIG. 1, the water of the stratified lake is generally warmed (epilimnion), temperature gradient layer ( It is differentiated into three layers of thermocline and hypolimnion.

The warm upper layer is almost uniform in temperature due to the mixing of surface water with wind and waves, but the temperature gradient layer is a water layer with a severe temperature change.

Appeal or lotus root water quality management is also important as external measures to block the inflow of pollutants from the outside, but can not be completely blocked, so if contaminants are introduced from the outside or if contaminants have already been introduced, Internal measures are even more important.

Therefore, the establishment of external countermeasures often prevents the inflow of pollutants, but the water quality has not improved. This is because many contaminants have already accumulated in the sedimentary layers. .

In order to prevent stratification and improve water quality as an internal countermeasure to the appeal, Symons (1969) attempted a hypolimnic aeration in Boltz, Kentucky, USA. He concluded that artificial stratification improves water quality in some key areas. In other words, artificial stratospheric destruction increased dissolved oxygen concentration and decreased sulfide concentration and algae growth.

In 1970, Brunnsviken, Sweden, also applied deep water aeration to significantly reduce hydrogen sulfide, improve dissolved oxygen, and continue to reduce phosphorus concentrations.

However, due to the deep water aeration, the deep water is pumped to the surface and re-aeration occurs due to contact with the atmosphere.Because the deep water is denser than the surface water, the deep water is settled directly into the deep water layer, so it does not spread far away. Less.

A similar method is the injection of oxygen method. It is classified into oxygen supply in summer and forced circulation of appealing water in winter. The oxygen supply method in summer supplies pure oxygen to the deep water layer for the purpose of oxidizing pollutants in the deep layer of summer stratification. It dissolves in deep water layers and disperses over large areas and does not mix with warm surface water due to oxygen supply.

The oxygen injection method was applied to Wesslinger, Germany, which has a water surface area of 0.171㎢, a maximum depth of 12 m, and a low capacity of 1.047 million ㎥. It did not destroy the summer stratification and the dissolved oxygen concentration in the deep water was 3-4. In order to maintain more than mg / L compressed air amount of 3,750 m 3 / d was required. As a result, the re-elution of nutrients was significantly reduced, resulting in a decrease in phosphate leaching from 150 kg to 50 kg during summer stratification.

In addition, the Swiss government of Halwiler (Eidgen ssische Anstaltf Wasserversorgung, Abwasserreinigung und Gew sserschutz (EAWAG)) is pursuing 3-4 t / d of pure oxygen without stratification. Iv) was injected from deep oxygen-depleted water, and the purifying target suggested a dissolved oxygen concentration of 4 mg / L.

However, the Institute of Water Conservation knew that this oxygen concentration was not maintained at regular intervals and adjusted the oxygen supply from the land based on the measurements. In other words, the forced circulation of winter season is a method of forcibly circulating the lake water by injecting strong compressed air into the lake water forming the winter stratification. In winter, the temperature difference of the whole lake is not large, so the density difference is not large. At this time, the compressed air is easy to float the deep water to the surface layer, the oxygen is supplied by contact with the air (reaerator) on the water surface.

The goal of forced circulation is to maintain the complete circulation of the water with minimal effort at all times and to homogenize the total appeal water. For example, based on data from the Baldegger appeal, the Swiss Halwiler appeal with a surface area of 10.2 ㎢, average depth of 28.6 m, and low water of 0.292 이 yields an output of approximately 600 m3 / h at 10 bar. Was required.

Looking at the principle, the air generated through the nozzle is supplied from the deep water layer to the surface water layer. The air is supplied more than 1,000 times of the water, and the oxygen-deficient deep water is mixed with the oxygen-rich surface water in the winter season. Also, the lack of oxygen is thereby replenished through the transfer of oxygen from the air (reaerator), and some of the oxygen in the compressed air is transferred into the water.

However, in the spring when the surface water temperature rises, the water circulation effect decreases, and in summer, the efficiency is very low because heavy deep water sinks again immediately without oxygen reception (reaeration). Therefore, in warm places throughout the year, it is changed back to the injection of pure oxygen.

In Germany, fischkalter (湖) had a surface area of 0.0328 ㎢, a maximum depth of 11.4 m, and a low capacity of 0.187 million ㎥, and in a polytrophic state, the deep layer was anaerobic. To this end, a compressor with an effective air volume of 190 L / min was operated throughout the year to completely destroy the chloride density layer, maintain saturated dissolved oxygen in all waters, and eliminate diatoms and green algae.

The Ellertshauser, with a surface area of 0.3 mm, a maximum depth of 14.5 m and a low capacity of 1.65 million m3, is also in an eutrophic state. The deep layer is completely free of oxygen and has high hydrogen sulfide concentration. This appeal uses a linear compressed air injector with the aim of releasing and oxidizing hydrogen sulfide and raising dissolved oxygen in lake water to 5.5 mg / L or more.The amount of compressed air required to destroy the strata is 900 L / min. The amount of air for additional conduction was 400 L / min. As a result, the dissolved oxygen concentration was maintained at 6-7.5 mg / L after 2 weeks of aeration.

Another internal countermeasure is the diversion of hypolimnic water. Deep water contains more nutrients and less oxygen, so the nutrients and oxygen in the appeal are more balanced through the exclusion of deep water.

Exclusion of deep water from research reports by Eschmann (1969) and Thomas (1970) in Wiler, Switzerland, Pechlaner (1975) in Austrian Lighter (R) and Hamalainen (1975) in Daman, Finland The water quality was improved by. This method, however, has a high biochemical oxygen demand (BOD) and many nutrients can cause some pollution problems in downstream streams.

In Korea, there are many cases of using underwater aeration to prevent water deterioration due to summer stratification. Under the Guangdong Dam and Dalbang Dam, which supplies water for living, blackwater phenomena due to odor, iron, and manganese elution caused by bird breeding caused the aeration of water, and in August 1996, Daecheongho, Yeongcheon Dam, Ulsan-Hoyaya Dam, It was also installed in Geoje-yeon. In order to improve the water quality and prevent eutrophication of the Unmun Dam, an underwater aeration system was installed to operate from late spring to early winter.

The various methods of water quality improvement described above are all related to summer stratification. Summer stratification is a layer formed by water of different densities, which is similar to a layer of oil covered on water. The oil is divided into three layers: air, oil, and water because oil is less dense than water and larger than air.

As such, the density of the temperature gradient layer water is smaller than that of the lower stagnation layer, and the density of the temperature gradient layer is larger than that of the warm upper layer. In addition, when oil is poured into the water, the oil is less dense than the water, and even if no force is applied on the water, the oil naturally diffuses over the surface of the water and forms an oil layer.

Then, when water of medium temperature (density) is poured between the hot and cold dense water, the medium temperature water spreads widely between the hot and cold water without applying force from the outside, such as oil between air and water. Will be.

Therefore, the surface water and the water of the deep water layer are introduced into the temperature gradient layer and mixed with each other, so that the water becomes medium temperature and diffuses widely between hot and cold water without applying force from the outside. Deep water can be mixed in large quantities and can function as the various appeal water quality improvement methods described above with less energy.

In addition, by providing a device for mixing and circulating water, the upper and lower layers of the liquid in the case where the liquid-activated sludge, wastewater-drugs, or nutrient-organisms are not mixed well due to different densities in the wastewater treatment plant. Unlike conventional agitating device, there is no mixing efficiency decrease by vortex or mass swirling caused by impeller rotation and local agitation by high speed rotation. Can be.

Thus, the present applicant and the inventor have proposed a density flow generation method and a device thereof (registered patent 10-0333245), which is a motor (1), a drive shaft (3), an impeller (5), a main body (7), as shown in FIG. 70) and the drive shaft (3) by rotating the impeller (5) by the driving force of the motor (1) by the temperature gradient which is the intermediate point between the low density surface water of the warm layer and the high density deep water of the stagnant layer Suction into the layer is mixed with a density similar to the density of the temperature gradient layer to be diffused again.

On the other hand, the buoy 10 is connected to the main body (7, 70) by the frame 11 so that the main body (7, 70) is placed in the water.

However, according to the conventional density flow generating apparatus as described above, there is a possibility of damaging the aquatic organism environment by narrowing the high density deep water of the lower stagnant layer flowing in through the lower ends of the

main bodies

7 and 70.

Therefore, when the low density surface water of the warm upper layer and the high density deep water of the lower stagnation layer are mixed and discharged to the temperature gradient layer at the intermediate point, the mixing ratio of the low density surface water and the high density deep water is the ecology of various natural factors as the concentration of the low density surface water is higher. It is less affected by toxicity.

For example, in the case of sucking 2 million tons of low density surface water in the warm upper layer and 1 million tons of high density deep water in the lower stagnation layer, the amount of water sucked by the impeller 5 through the upper and lower ends of the

main bodies

7 and 70. If this is the same, 1 million tons of water in the stagnant lower layer is all inhaled, but 1 million tons of 2 million tons of water in the warm upper layer should be further inhaled and diffused.

Therefore, at this time, if the ratio of the amount of water sucked in the warm upper layer and the lower layer by the impeller 5 can be 2: 1, the density flow generation time can be reduced and efficient.

Furthermore, as the water quality of the lower stagnation layer gradually improves after the density flow generating device is operated, when the amount of water sucked from the lower stagnation layer is increased, the water quality improvement efficiency can be further improved. Therefore, if the mixing ratio of the water sucked in the warm upper layer and the lower layer can be changed, the density flow generating device can be operated more efficiently.

However, since the mixing ratio of the water in the warm upper layer and the stagnant lower layer sucked into the density flow generating device is set by the structure or shape of the impeller, when the mixing ratio is set once, it is difficult to easily change it because the impeller is designed and manufactured according to the set mixing ratio. There is a problem.

If the impeller is inevitably changed to change the mixing ratio, the impeller, which is a key part of the density generating apparatus, is redesigned and manufactured to suit the changed mixing ratio, and the main body of the density generating apparatus weighing about 10 tons is separated from the water. Since the impeller has to be replaced, there is a problem in that such replacement work is hardly executed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides an impeller so that the water intake ratio at the top and the bottom of the density flow generating apparatus is 1: 1, and adds a plurality of suction hoses to the outer peripheral surface of the induction pipe for sucking water It is to provide a density flow generating device having a mixing ratio adjustment function that can be easily provided by changing the suction amount of the surface water and the bottom water.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

Density flow generating device having a mixing ratio adjusting function for achieving the above object, the first induction pipe is formed with a first inlet; A second induction pipe connected to the first induction pipe and having a second intake port formed at a lower end thereof; A discharge part formed between the first induction pipe and the second induction pipe; A centrifugal impeller disposed in the discharge portion; And at least one suction hose communicating with an outer circumferential surface of the first induction pipe or an outer circumferential surface of the second induction pipe; It includes.

In addition, the density flow generating apparatus having the mixing ratio adjustment function, the support wire for connecting between the end of the suction hose and the floating body provided on the water surface for arranging the first induction pipe; It further includes.

In addition, the density generating device having the mixing ratio adjustment function, the motor provided in the upper portion of the first induction pipe to be expressed on the water surface (water surface); And a driving shaft provided inside the first induction pipe to connect the centrifugal impeller and the motor. It includes more.

In addition, the centrifugal impeller is characterized in that a plurality of blades are provided in the same shape along the radial direction on the upper surface and the lower surface.

In addition, the suction hose is characterized in that it is formed of a flexible (felexible) material.

In addition, the diameter of the first intake port is characterized in that larger than the diameter of the second intake port.

The cross-sectional area of the first intake port may be equal to the sum of the cross-sectional area of the second intake port and the cross-sectional area of the suction hose.

According to the present invention, the impeller is provided so that the water intake ratio at the top and the bottom of the density flow generating device is 1: 1, and a plurality of suction hoses are additionally provided on the outer circumferential surface of the induction pipe for sucking water, The amount of suction can be easily changed.

In addition, the weight of the suction hose formed of a flexible material is significantly lighter than that of a steel or stainless steel pipe, so that the total weight of the density flow generating device can be significantly reduced, and the length of the suction hose can be changed according to the use environment. There is an advantage.

1 is a schematic view for explaining the stratified shape of water in summer appeal.

Figure 2 is a schematic diagram showing a state in which a conventional density flow generating device is installed in the lotus root ocean, such as an inner water reservoir or lake and port.

3 is a view showing a state in which the density flow generating apparatus according to an embodiment of the present invention is installed in water.

4 is a cross-sectional view illustrating a discharge part of the density flow generating device according to an embodiment of the present invention.

5 is a view showing the centrifugal impeller of the density flow generating device according to an embodiment of the present invention.

6 and 7 are views showing the operating state of the density flow generating apparatus according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be made based on the contents throughout the specification. And the spirit of the present invention is not limited to the embodiments presented, those skilled in the art of understanding the spirit of the present invention can easily implement other embodiments within the scope of the same idea, but also within the scope of the present invention Of course.

3 is a view showing a state in which the density flow generating apparatus according to an embodiment of the present invention is installed in water, Figure 4 is a cross-sectional view showing the discharge portion of the density flow generating apparatus according to an embodiment of the present invention, Figure 5 Figure is a view showing the centrifugal impeller of the density flow generating device according to an embodiment of the. A detailed configuration and structure of the density flow generation device will be described in detail with reference to FIGS. 3 to 5.

The density flow generating device is a device having a function of circulating water in order to improve the water quality of the stagnant lake or lotus root, the port, the first induction pipe 100, the second induction pipe 200, The discharge unit 300, the centrifugal impeller 400, the plurality of suction hoses 500, the support wire 600, the motor 700, the drive shaft 800, and the like are configured.

The first induction pipe 100 is formed of a pipe having an upper and lower end open and an empty inside thereof, and a first intake port 110 for sucking the surface water of the warm upper layer into the upper end of the first induction pipe 100. To be prepared. Then, the surface water sucked through the first intake port 110 is discharged to the discharge unit 300 to be described later through the lower end of the first induction pipe (100).

On the other hand, when the density flow growth apparatus is operated, the first induction pipe 100 is arranged to be connected to the floating body 900 provided on the water surface (upright) in the water. That is, the first induction pipe 100 is disposed upright in the water in the form of a wire (not shown) hanging on a frame (not shown) provided on the floating body 900, the floating body 900 is a float (920) To float the water surface.

Like the first induction pipe 100, the second induction pipe 200 is formed of a pipe having an upper and lower ends open and empty inside, and is spaced apart from the first induction pipe 100, and has a lower stagnation layer at a lower end thereof. The second intake port 210 for sucking the deep water of the inside is formed.

The second induction pipe 200 and the first induction pipe 100 are spaced apart from each other based on the same central axis, in order to form the discharge portion 300. That is, the surface water sucked into the first intake port 110 and the deep water sucked into the second intake port 210 are spaced apart between a lower end of the first induction pipe 100 and an upper end of the second induction pipe 200. Through the discharged space, that is, the discharge part 300, the discharge is diffused and diffused into the temperature gradient layer.

Meanwhile, as shown in FIG. 4, the first induction pipe 100 and the second induction pipe 200 are connected by a spacer 310 formed in a pin shape. The spacer 310 is disposed a plurality of spaced apart a predetermined interval along the outer periphery of the lower end of the first induction pipe 100 and the upper end of the second induction pipe 200, and forms a space of the discharge unit 300 It is preferable that it is formed as high as possible.

The discharge part 300 is formed between the first induction pipe 100 and the second induction pipe 200 as described above, the surface water sucked into the first intake port 110 and the second intake port 120 The low-layer water sucked by) is mixed with each other in the discharge part 300 and discharged and diffused into the temperature gradient layer.

The centrifugal impeller 400 is disposed in the discharge part 300 as shown in FIG. 4, and a plurality of blades 410 are provided on the top and bottom surfaces of the centrifugal impeller 400, respectively. In addition, an impeller shaft 420 is formed at a center of the centrifugal impeller 400 so that one side of the blade 410 is connected to the centrifugal impeller 400 so that the centrifugal impeller 400 is rotated.

Meanwhile, suction force is generated in the first intake port 110 and the second intake port 120 by the rotation of the centrifugal impeller 400, so that the surface water and the deep water are respectively the first induction pipe 100 and the second water. Injected into the induction pipe 200, the ejection portion 300 is generated by the injection force is the surface water and the deep water introduced into the first induction pipe 100 and the second induction pipe 200 is mixed with each other It is discharged and diffused through the discharge part 300.

As described above, a plurality of blades 410 are provided on the top and bottom surfaces of the centrifugal impeller 400, and the blades 410 provided on the top surface of the centrifugal impeller 400 shown in FIG. ) And the blade 410 provided on the bottom surface of the centrifugal impeller 500 shown in FIG. 5B are provided in the same shape along the radial direction of the centrifugal impeller 400.

Therefore, according to an embodiment of the present invention, the amount of water introduced into the lower end of the first induction pipe 100 and the upper end of the second induction pipe 200 and mixed in the discharge part 300 has the same mixing ratio. do.

At least one suction hose 500 is provided to communicate with an outer circumferential surface of the first induction pipe 100 or an outer circumferential surface of the second induction pipe 200.

That is, the density flow generating apparatus is such that the mixing ratio of the amount of water injected into the discharge part 300 from the lower end of the first induction pipe 100 and the upper end of the second induction pipe 200 is 1: 1. One centrifugal impeller 400 is included, and further includes the suction hose 500.

Therefore, in the initial stage of operation of the density flow generating device, a part of the plurality of suction hoses 500 is disposed in the surface water, and if necessary, some suction hoses 500 located in the surface water are disposed in the deep water, thereby providing the first induction pipe 100. The mixing ratio of the surface water or the deep water flowing into the discharge part 300 from the lower end and the upper end of the second induction pipe 200 can be easily adjusted.

According to one embodiment of the invention, as shown in Figure 3, the suction hose 500 is provided on the outer peripheral surface of the upper end of the second induction pipe 200, which is an example the suction hose 500 It is apparent to those skilled in the art that the first induction pipe 100 may be provided on the outer circumferential surface thereof or may be provided in three or more.

On the other hand, the suction hose 500 is preferably formed of a flexible material (felexible). Therefore, since the suction hose 500 is significantly lighter than a tube formed of steel or stainless steel, a density flow generating device having a weight of about 10 tons can be manufactured with a weight of about 6 to 8 tons.

In addition, the suction hose 500 is provided in a bellows type, that is, in the form of a corrugated pipe so that the length of the suction hose 500 can be easily changed. Installation is much simpler.

In addition, when the water level is changed in accordance with environmental changes such as dry season or rainy season, the end position of the suction hose 500 that sucks the surface water or the deep water can be easily adjusted.

According to one embodiment of the invention, the diameter of the first intake port 110 is larger than the diameter of the second intake port 210, the cross-sectional area of the first intake port 110 of the second intake port 210 It is characterized by the same as the sum of the cross-sectional area and the cross-sectional area of the suction hose (500).

Specifically, when the low-density surface water of the warm upper layer and the high-density deep water of the stagnant lower layer are mixed and discharged to the temperature gradient layer that is the intermediate point through the discharge part 300, the mixing ratio of the surface water and the deep water is higher as the concentration of the surface water is higher. Since it is less affected by the ecotoxicity caused by various natural factors, one of the two suction hoses 500 is disposed in the surface water, and the other in the deep water, as shown in FIG. As a result, the amount of the surface water flows into the discharge part 300 more than the depth water so as to be discharged.

In addition, when the depth of the deep water sucked from the stagnant layer is increased as the water quality of the deep water gradually improves after the density flow generating device operates, the discharge part 300 is disposed by placing the suction hose 500 disposed in the surface water in the deep water. ), The surface water and the deep water are introduced and discharged in the same amount.

The support wire 600 is connected between the floating body 900 and the end of the suction hose 500, the suction hose 500 of the suction hose 500 that must be disposed in the warm upper layer or stagnant layer in order to suck the surface or deep water Fix the position.

According to an embodiment of the present invention, the support wire 600 is provided to be adjustable in length on the body 900, when the suction hose 500 is disposed in the lower layer, the length of the support wire 600 In order to reduce and reduce the length of the support wire 600 when the suction hose 500 is disposed on the warm layer, the arrangement position of the suction hose 500 can be easily adjusted.

Further, by adjusting the placement position of the suction hose 500 by the expansion and contraction of the support wire 600, it is easy to adjust the mixing ratio of the surface water and the deep water discharged from the discharge portion 300 without replacing parts such as an impeller Can be.

The motor 700 is provided on an upper portion of the first induction pipe 100 so as to be displayed on the surface of the water, and is provided inside the first induction pipe 100 of the drive shaft 800 and the centrifugal impeller. 400 and the motor 700 is connected.

That is, the motor 700 generates a rotational driving force for rotating the centrifugal impeller 400, and the drive shaft 800 transfers the rotational driving force generated from the motor 700 to the centrifugal impeller 400. To pass.

6 and 7 are views showing the operating state of the density flow generating apparatus according to an embodiment of the present invention. A detailed operation process of the density flow generation device will be described in detail with reference to FIGS. 6 and 7.

As an exemplary embodiment, as shown in FIG. 6, the density flow generating device includes four suction hoses 500 on the upper outer circumferential surface of the second induction pipe 200, and the two density flow generating devices are initially operated. An end of the suction hose 500 is disposed in the warming layer.

Therefore, while the centrifugal impeller 400 drives deep water through the second intake 210 of the second induction pipe 200 and the two suction hoses 500 disposed under the stagnant layer, Surface water is disposed through the first intake port 110 of the first induction pipe 100 and two suction hoses 500 disposed in the warm upper layer.

That is, since the diameter of the first intake port 110 is formed to be larger than the diameter of the second intake port 210, the number of surface layers is mixed more than the depth of water at the initial stage of the operation of the density flow generating device so that the discharge part 300 is formed. Is discharged through.

As the water quality of the deep water gradually improves after the density flow generating device operates, the amount of the deep water sucked from the stagnant lower layer is increased. As shown in FIG. 7, all of the four suction hoses 500 are stored in the deep water. By disposing, the discharge portion 300 flows in and discharges the same amount of surface water and deep water.

That is, according to an embodiment of the present invention, since the cross-sectional area of the first intake port 110 is formed to be equal to the sum of the cross-sectional area of the second intake port 210 and the cross-sectional area of the suction hose 500, Surface water and deep water flow into the discharge part 300 from the upper and lower portions of the centrifugal impeller 400.

In conclusion, according to the present invention, by changing the arrangement position of the plurality of suction hoses 500 according to the use environment, the mixing ratio of the surface water and the deep water in the discharge part 300 can be easily adjusted, so that the density flow generation operation can be efficiently performed. .

Although embodiments according to the present invention have been described above, these are merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments of the present invention are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the following claims.

Claims

A first induction pipe having a first intake port formed at an upper end thereof;

A second induction pipe connected to the first induction pipe and having a second intake port formed at a lower end thereof;

A discharge part formed between the first induction pipe and the second induction pipe;

A centrifugal impeller disposed in the discharge portion; And

At least one suction hose communicating with an outer circumferential surface of the first induction pipe or an outer circumferential surface of the second induction pipe; Density flow generation device having a mixing ratio adjustment function comprising a.
The method of claim 1,

A support wire for connecting the float provided on the water surface and the end of the suction hose to arrange the first induction pipe in water; Density flow generating device having a mixing ratio adjustment function further comprising.
The method of claim 1,

A motor provided on an upper portion of the first induction pipe so as to be displayed on a water surface; And

A drive shaft provided inside the first induction pipe to connect the centrifugal impeller and the motor; Density flow generation device having a mixing ratio adjustment function further comprising.
The method of claim 1,

The centrifugal impeller is a density flow generating device having a mixing ratio adjustment function, characterized in that a plurality of blades are provided in the upper and lower surfaces in the same shape along the radial direction.
The method of claim 1,

The suction hose is a density flow generation device having a mixing ratio adjustment function, characterized in that formed of a flexible (felexible) material.
The method of claim 1,

The diameter of the first intake port is larger than the diameter of the second intake port density density generating device having a mixing ratio adjustment function.
The method of claim 6,

The cross-sectional area of the first intake port is equal to the sum of the cross-sectional area of the second intake port and the cross-sectional area of the suction hose, the density flow generation device having a mixing ratio adjustment function.