KR102262066B1 - Pressurized floating device using micro bubble generator - Google Patents

Abstract

The present invention relates to a pressurized flotation tank using a microbubble generator, and more particularly, using a bubble tank and a dissolution tank that can generate microbubbles uniformly and in high concentration using a multi-stage pump without using a conventional compressor. It is about the pressure flotation tank.

Description

Pressurized floating device using micro bubble generator

The present invention relates to a pressurized flotation tank using a microbubble generating device, and more particularly, using a bubble tank and a dissolution tank that can generate microbubbles uniformly and at a high concentration using a multi-stage pump without using a conventional compressor. It is about the pressure flotation tank.

Foreign substances combined with microbubbles float to the surface by the buoyancy of the bubbles, and the polluted water can be easily purified by removing the substances collected on the surface. Also, harmful gases and liquids dissolved in a liquid can be changed to a more soluble gas, and pollutants can be removed by vaporizing the gas.

In general, bubbles with a diameter of more than 50 μm are called large bubbles, bubbles of 50 μm or less are called micro bubbles, and very small bubbles of 1 μm or less are called ultra-fine bubbles.

Microbubbles are very small, with a bubble size of several microns, so they float like swimming in water because of their small buoyancy, and they swim for a long time in water because of their high resistance to buoyancy. In other words, it floats very slowly in the water and is destroyed and disappears in the water due to the self-contraction action and the surface tension of the water.

The microbubbles that disappear in this way generate a shock wave and generate a large amount of negative ions when they are extinguished. The shock wave generated during extinction generates heat and acts on organic and inorganic materials to promote decomposition, thereby destroying bacteria and sterilizing.

And anions are attached to cations, which are pollutants, and increase in volume, so that they rise to the surface by buoyancy and are used to remove pollutants, so they can be used for industrial waste purification treatment and various sterilization devices.

The biggest difference between ultra-fine bubbles and micro-bubbles is their lifetime in the liquid. Coarse bubbles with large diameters float to the surface due to large buoyancy and disappear, while microbubbles with relatively small diameters float, but gradually contract and disappear due to the self-pressurization effect.

On the other hand, ultrafine bubbles rise to the surface and do not disappear due to Stokes' law and Brownian motion.

The core of the technology for removing pollution by the floating method is a device for generating microbubbles and mixing them with contaminated water. FIG. 1 is a conceptual diagram showing the configuration of a device for generating microbubbles according to the prior art.

As shown in FIG. 1, the microbubble generator includes a compressor 2 for pressurizing gas (air) and inputting a liquid (water) and a pressurization pump 1 for injecting liquid (water), except for the gas discharged from the compressor (2). The liquid from the pressurization pump (1) meets at the ejector (3) and is mixed uniformly.

The ejector 3 is a point where liquid and gas meet and join, and the liquid and gas may be mixed while generating a vortex by the rotation of the screw. At this time, the mixed liquid exiting the ejector (3) enters the pressure tank (4) and is stored.

The pressure tank 4 is provided with a valve for regulating the pressure, and a pressure gauge for measuring the internal pressure may be provided.

In addition, the mixed liquid inside the pressure tank 4 has a form in which fine-sized bubbles are mixed in the liquid.

Also, the mixed liquid from the pressure tank 4 moves to the tank 5, and it meets and mixes with the influent discharged from the inlet on the way.

The influent is a liquid in which contaminants are mixed, and as foreign substances in a solid or gaseous state meet with the microbubble mixed liquid, the foreign substances are removed while floating inside the tank 5 by the microbubbles. In the nozzle installed inside the tank 5 , the high-pressure mixed liquid is rapidly decompressed and sprayed, and accordingly, a large amount of microbubbles are generated inside the tank 5 .

A treated water outlet is installed on one side of the tank 5, and a passage for discharging the contaminants floating on the surface and a passage for discharging the liquid from which the contaminants are removed are provided to separate the contaminants from the liquid.

In a general device, a high-pressure gas is blown into the liquid discharged from the pressurization pump (1) to mix, and the fixed mixer (3) uses a method of breaking the air bubbles finely by rotation of a screw to generate micro-bubbles. The liquid mixed with microbubbles is mixed with the influent while being stored in a large-capacity pressure tank (4).

However, the conventional invention requires a compressor (2) because high-pressure gas must be blown, and a fixed mixer (3) for generating microbubbles and a pressure tank (4) for maintaining the microbubble mixed liquid are required. There was a problem in that it became large and it was difficult to install it.

Korean Patent No. 1810362 Korean Patent No. 1177304 Japanese Patent No. 6210917 Japanese Patent Laid-Open No. 2011-121002

The present invention has been made to solve the above problems, and by using a multi-stage pump without using a conventional compressor, microbubbles are generated and mixed with liquid at the same time to easily generate microbubbles, thereby reducing cost and space An object of the present invention is to provide a pressurized flotation tank using a microbubble generator that can efficiently float scum to the surface of the water and trap wastewater.

In order to solve the above problems, the present invention provides air suction through an air suction pipe installed at a certain height to prevent backflow formed on one side, and is mixed with the liquid introduced through the liquid pipe formed on the other side to prevent a vortex by the rotational force of the motor. a pump that uniformly generates microbubbles of a certain concentration through; a dissolution tank that receives microbubbles from the microbubble generating pump and moves them to a moving tube while maintaining a constant pressure; a moving pipe that receives the microbubbles from the dissolution tank and moves them to the air bubble tank; an air bubble tank that combines with each other and dissolves by mixing of the liquid received from the storage tank containing the microbubbles and wastewater received from the moving pipe; and a pressurized flotation tank that receives the combined and dissolved wastewater liquid phase from the air bubble tank to float the scum and settle the sludge.

The moving pipe is a flexible pipe connecting the dissolution tank and the air bubble tank.

The air bubble tank has a pressure impact type venturi nozzle capable of uniformly mixing microbubbles with wastewater at high pressure and high concentration.

The air bubble tank generates a liquid phase mixed with microbubbles of a certain concentration or more by using a swirling nozzle that generates a tornado therein.

The air suction pipe of the pump is installed with a length higher than the height of the storage tank to prevent backflow.

The pump is coupled to a plurality of pumps in multiple stages.

The liquid pipe is a priming water inlet through which priming water is introduced.

The pressurized flotation tank further includes a UV-LED for sterilizing microbubbles at a predetermined position.

In the pump, a plurality of pumps are coupled in multiple stages, and the ozone device 60 is further connected.

The present invention made as described above can easily filter wastewater by using a device for generating microbubbles with a multi-stage pump without using a conventional compressor.

In addition, the present invention can reduce power consumption because a large-capacity pressurized tank is unnecessary.

In addition, the present invention is a model optimized for a space limited by a miniaturized configuration and less limited installation space.

In addition, the present invention does not consume any power other than the pump, is simple, has few malfunctions, and is easy to maintain by a remote administrator.

In addition, the present invention does not have a noise generating source, so noise countermeasures are unnecessary even for late-night driving.

1 is a configuration diagram showing a pressurized flotation tank using a microbubble generating device according to the prior art.
2 is a view showing the configuration of a pressure flotation tank using a microbubble generating device according to an embodiment of the present invention.
3 is a view showing a perspective view of a pressure flotation tank using a microbubble generating device according to an embodiment of the present invention.
Figure 4 is a view showing a front view of the pressure flotation tank using the microbubble generating device according to an embodiment of the present invention.
Figure 5 is a view showing a side view of the pressure flotation tank using the microbubble generating device according to an embodiment of the present invention.
6 is a view showing a plan view of the pressure flotation tank using the microbubble generating device according to an embodiment of the present invention.
7 is a view showing the configuration of a pump according to an embodiment of the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those of ordinary skill in the art. Accordingly, the shape of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same member is shown with the same reference numerals in some cases. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the gist of the present invention will be omitted.

2a to 6, the present invention includes a pump 10, a dissolution tank 20, a moving pipe 25, an air bubble tank 30, a pressurized flotation tank 50, and the like.

In the pump 10, air is sucked in through an air suction pipe installed at a height for preventing backflow on one side, and mixed with the liquid introduced through the liquid pipe on the other side, uniformly through a vortex by the rotational force of the motor. It is a device that generates microbubbles of a certain concentration.

And, as shown in FIG. 2B , the ozone device 60 may be additionally connected to suppress biochemical oxygen demand and the like.

The air suction pipe 11 of the pump 10 is installed with a length higher than the height of the pressurizing flotation tank 50 to prevent backflow.

In addition, oxygen, ozone gas, etc. may be sucked into the air suction pipe 11 , and the material of the wetted part of the pump 10 may be selected according to the purpose.

In addition, the pump 10 used in the present invention may be replaced with various types of pumps for mixing two types of liquids or gases and liquids that are not generally mixed well with each other.

In addition, a vortex is generated inside the pump 10 according to the present invention and repeatedly pressurized to mix, stir, and dissolve microbubbles of a certain size and discharge to the outside.

Therefore, the pump 10 according to the present invention sucks water and air by the self-suction power of the pump without the need for a compressor, a compressor, an ejector, etc., so that it is a compact and space-saving system, and thus it is possible to significantly reduce costs.

The micro-bubbles according to an embodiment of the present invention include micro-bubbles or nano-bubbles, and when the gas is compressed and the internal pressure rises in the process of the bubbles becoming smaller and disappearing, electric charges are applied to the surface of the bubbles. Concentrated and concentrated ions generate free radicals and stabilize the smaller nanobubbles.

Here, a free radical is a material with a highly reactive unpaired electron due to decomposition of water molecules, etc., and can decompose harmful chemicals because of its high energy.

In the pump 10, a plurality of pumps may be coupled in multiple stages to produce microbubbles of a certain concentration, and the microbubbles generated in the multistage coupling pump 10 are simultaneously discharged through a pipe connected to each other, so that the number of discharged microbubbles and the pressure increases.

The dissolution tank 20 is a device that receives the microbubbles from the microbubble generating pump 10 and moves them to a moving tube while maintaining a constant pressure.

Here, the dissolution tank 20 of the present invention is in the form of a pipe having a certain diameter, but may be modified in various forms.

The moving tube 25 is a device that receives the microbubbles from the dissolution tank 20 and moves them to the air bubble tank 30 .

Here, the moving pipe 25 is a flexible pipe connecting the dissolution tank 10 and the air bubble tank 30, and the microbubbles of the dissolution tank 10, which are relatively small in size, are mixed with the relatively large air bubbles. By pushing into the tank 30, it is possible to create an effect of increasing the bubbles as if the bubbles pushed by a strong pressure spread in a wide space (Venturi effect).

In addition, at both ends of the moving pipe 25, a bubble generating pipe 31 having an X-shaped blade 31-1 inserted therein is connected, and one end of the bubble generating pipe 31 is connected to the dissolution tank ( 20) is coupled between the “V”-shaped wings 21, and swirls inside the “V”-shaped wings 21 so that water and air are mixed.

Therefore, the microbubbles according to the present invention obtain a strong pressure while forcibly drawn into the flexible moving tube 25 of a certain diameter.

In addition to this, as seen in FIG. 5 , the moving tube 25 is bent between 90 and 45 degrees, and by this sharply bent angle, the effect of increasing the bubble of microbubbles according to the rapidly changing pressure can be seen.

The air bubble tank 30 is a device that combines with each other and dissolves by mixing the fine bubbles received from the moving pipe 25 and the liquid received from a flocculation tank containing wastewater.

The pressurization flotation tank 50 is a device for receiving the combined and dissolved wastewater liquid phase from the air bubble tank 30 to float the scum and settling the sludge.

The pump 10 is characterized in that a plurality of pumps are coupled in multiple stages, and the air suction pipe 11 is additionally connected to each pump, and the discharged microbubbles are discharged through one pipe ( see Fig. 7).

The liquid pipe 12 is a pipe through which priming water is introduced as a priming water inlet.

An external liquid may be used as a priming material, and the amount may be adjusted according to the concentration of microbubbles.

In the air bubble tank 30, when wastewater of a certain pressure passes through a nozzle of a special structure, a tornado phenomenon with high-speed rotational force and acceleration force is generated at the nozzle outlet, and a high vacuum pressure is generated by a strong tornado phenomenon, resulting in a large number of microbubbles. is discharged to the pressurized flotation tank.

The air bubble tank 30 has a pressure collision type venturi nozzle capable of uniformly mixing microbubbles with wastewater at high pressure and high concentration.

The pressure impact type venturi nozzle according to the present invention is a nozzle using the Venturi effect in which the pressure of the fluid is relatively reduced when passing through a narrow portion having a smaller diameter than in the pipe. The pressure loss is extremely small compared to an orifice or nozzle that produces the same differential pressure.

The air bubble tank 30 generates a liquid phase mixed with microbubbles of a certain concentration or more by using a swirling nozzle that generates a tornado therein.

For example, a tornado phenomenon of water having a very high gravitational acceleration such as a tornado lasts for a certain period of time in the microbubbles and the air bubble tank 30 and easily dissolves air in the wastewater, so that the oxygen transfer efficiency is very high.

And the microbubbles are additionally sent to the pressurized flotation tank 50 while being diffused inside the air bubble tank 30 . The fine bubble mixture descending into the pressure flotation tank 50 collides with the bottom of the reaction tank and rises to form a swirling flow to float the scum and precipitate the sludge.

As an embodiment of the present invention, as an example of microbubbles, microbubbles have a (-) charge, and oil and contaminants contained in water have a (+) charge, so the microbubbles push oil and contaminants above the water surface. and can be filtered out with a skimmer. At this time, in the case of microbubbles, an additional sterilization effect can be obtained by instantaneously forming high temperature and high pressure while crushing and generating (-) radicals with strong sterilization power.

Specifically, the dissolution tank 20, the air bubble tank 30, and the pressure flotation tank 50 according to the present invention further include a UV-LED (not shown) for sterilizing microbubbles at a predetermined position.

In addition, the dissolution tank 20, the air bubble tank 30, and the pressure flotation tank 50 according to the present invention further include a laser measuring sensor (not shown).

For example, if a laser is irradiated onto water with microbubbles through a laser measurement sensor, the laser scattering line can be seen. If microbubbles are not present, the laser line is invisible, and the greater the number of objects, the stronger the line strength. Take advantage of the intensifying nature.

In addition, the laser measuring sensor is a measuring device that can measure the size and density of bubbles according to the pressure change and the method of generating the microbubbles, so that the administrator can easily determine when to additionally use the UV-LED.

As an embodiment using this, when the amount of microbubbles using the laser measurement sensor is less than the amount required for actual contaminant removal, an administrator may be warned, for example, it may be transmitted to a real-time monitoring system and reported to the administrator.

In addition, the dissolution tank 20, the air bubble tank 30, and the pressure flotation tank 50 according to the present invention may further include a contamination sensor (not shown).

The UV-C LED is designed to emit short ultraviolet light with a wavelength of 200 to 280 nanometers (nm), and is used for sterilization or curing devices by destroying bacterial DNA on the surface of an object or flowing water and causing a chemical reaction with a special material.

The UV-C LED used in the present invention has a high light output with a wavelength of 278 nm, and the higher the light output, the stronger the sterilization device can be made, but it may be difficult to secure stable quality due to heat or the like. Therefore, the present invention overcomes this by adding various components.

As another example of the present invention, the UV-C LED has a Wavelength 278nm, Forward Current 350 mA, Optical Power 100mW, Forward Voltage 7.0V, Beam Angle 120 Degree (100mW class), Wavelength 278nm, Forward Current 200 mA, Optical Power 200mW, Forward Voltage 30V, Beam Angle 120 Degree (200mW class), Wavelength 278nm, Forward Current 350 mA, Optical Power 300mW, Forward Voltage 32V, Beam Angle 120 Degree (300mW class).

A reflector for reflecting the light (L) of the UV-C LED is formed on the surface of the UV-C LED PCB substrate.

The reflective plate is composed of a reflective surface having a constant reflection angle, and is formed by depositing or sheeting an aluminum metal film on a surface of a metal or plastic.

When the sterilization effect of the UV-C LED PCB substrate is reduced, the real-time monitoring system transmits alarm information to the user.

A protective lens or a protective coupling part for protecting the UV-C LED PCB board is additionally installed.

The real-time monitoring system detects abnormalities in the decanter UV disinfection device by identifying the sterilization performance and heating status of the UV-C LED PCB board in real time.

It further includes a real-time monitoring system for detecting the abnormality of the pressurized floating tank by grasping the operating state of the UV-C LED PCB board in real time.

In the real-time monitoring system, sterilization information and fever information can be determined according to a reference value, and the reference value means an upper limit or a lower limit that can be regarded as a normal category, a value predetermined by a separate setting procedure, and each detailed judgment information It is set differently according to the characteristics.

In addition, after the real-time monitoring system receives real-time sterilization information and heat information of the pressurized flotation tank, it is possible to predict and notify the overheating time by statisticizing the rate of heat increase over time.

In addition, the real-time monitoring system is primarily connected to the manager terminal capable of wireless communication, and can be secondarily connected to the emergency contact terminal when the connection to the manager terminal is not established within a set time.

As another embodiment of the present invention, the real-time monitoring system provides convenience to maintenance by immediately sending an SMS to the manager when an abnormality or overheating of the pressurized levitation tank occurs.

Therefore, the present invention enables real-time operation monitoring at a remote location and quick response in case of an abnormality.

In addition, the present invention can view the water quality status, emergency message status including heat related to UV-C LED of the pressurized flotation tank, and UV-C LED status information of the pressurized flotation tank on one screen on the main screen of the real-time monitoring system.

A lens is installed at a location spaced a predetermined distance from the UV-C LED and has a waterproof function.

At this time, the UV-C LED and the lens are cased into one body and installed on the side wall of the UV-C LED PCB board.

The lens is a waterproof member, and may be made of quartz or fused silica glass, which can easily transmit ultraviolet rays.

In addition, the cleaning unit attached to the side of the lens automatically cleans the inside of the decanter UV disinfection device when the real-time monitoring system detects a decrease in the sterilization performance of the UV-C LED to increase the efficiency of the disinfection device.

A sensor (eg, a pollution level measuring sensor for measuring the level of pollution in water) may be attached around the washing unit.

The sensor information transmitted from the sensor is information measuring cleaning performance and intensity of light emission, and the light emission information may be transmitted to a real-time monitoring system and reported to a manager.

On the other hand, the dissolution tank 20 and the air bubble tank 30 in the direction of the outlet side to which the microbubbles are discharged, a screw-shaped outer wall or an additional screw-shaped rotating body may be further formed.

In order to more easily generate microbubbles, the radius of the spiral surface of the rotating screw becomes smaller and the interval becomes narrower toward the moving direction of the microbubbles.

In addition, a plurality of holes of 3 to 4 are formed in the external spiral surface of the screw, the holes are proportional to the diameter of the spiral surface, and the microbubble particles are reversely flowed through the holes by the rotation of the screw and are fine again It has a structure that is refined while being crushed.

Hereinafter, a method using a pressure flotation tank using a microbubble generating device for the practice of the present invention will be described in detail.

First, air is sucked through an air suction pipe installed at a predetermined height to prevent backflow formed on one side through the pump 10 .

Then, it is mixed with the liquid introduced through the liquid pipe formed on the other side of the pump 10 to uniformly generate microbubbles of a certain concentration through the vortex by the rotational force of the motor.

Therefore, the wastewater can be easily filtered by using a device that automatically sucks the liquid into the pump, mixes it with air, and generates microbubbles.

The microbubbles are received from the microbubble generating pump 10 through the dissolution tank 20 and moved to a moving tube while maintaining a constant pressure.

The moving tube 25 having a narrow diameter and an "X"-shaped wing receives the microbubbles from the dissolution tank 20 and pressurizes it to the air bubble tank to move it.

The air bubble tank 30 combines with each other and dissolves by mixing the microbubbles received from the moving pipe 25 and the liquid received from a flocculation tank containing wastewater.

Finally, the combined and dissolved wastewater liquid phase is received from the air bubble tank 30 through the pressure flotation tank 50 to float the scum and precipitate the sludge.

Therefore, the present invention does not consume any power other than the pump, is simple, has fewer malfunctions, and is easy to maintain by remote administrators, and has no noise source, so noise countermeasures are unnecessary even in late-night operation.

10 : pump
20: dissolution tank
21: "V" shaped wings
25: moving tube
30: air bubble tank
50: pressurized flotation tank
60: ozone device

Claims (8)

Air is sucked through an air suction pipe installed at a certain height to prevent backflow formed on one side, and mixed with the liquid introduced through the liquid pipe 12 formed on the other side through a vortex by the rotational force of the motor a pump 10 for uniformly generating microbubbles of a certain concentration; a dissolution tank 20 for receiving microbubbles from the microbubble generating pump 10 and moving them to a moving tube while maintaining a constant pressure; a moving pipe 25 for receiving microbubbles from the dissolution tank 20 and moving them to the air bubble tank; an air bubble tank 30 for combining and dissolving microbubbles received from the moving pipe 25 and liquid from a flocculation tank containing wastewater to be mixed with each other; a pressurized flotation tank 50 that receives the combined and dissolved wastewater liquid phase from the air bubble tank 30 to float the scum and settle the sludge; The pressurized flotation tank 50 includes a UV-C LED that sterilizes microbubbles at a predetermined location;
The pump 10, a plurality of pumps are coupled in multiple stages, the ozone device 60 is connected,
The air bubble tank 30 generates a liquid phase mixed with microbubbles of a certain concentration or more using a rotating nozzle that generates a tornado therein,
The moving pipe 25 is a flexible pipe connecting the dissolution tank 20 and the air bubble tank, and at both ends of the moving pipe 25, blades 31-1 having an X-shaped cut surface are inserted therein. The bubble generating tube 31 is connected, and one end of the bubble generating tube 31 is coupled between the “V”-shaped wings 21 of the dissolution tank 20 , and the “V”-shaped blades 21 . Swirl inside to mix water and air,
The UV-C LED and the lens are cased into one body and installed on the side wall of the UV-C LED PCB board,
The dissolution tank 20, the air bubble tank 30, and the pressurized flotation tank 50 further include a laser measurement sensor,
The lens is a waterproof member, and is made of quartz or fused silica glass that can easily transmit ultraviolet rays, and the cleaning unit attached to the side of the lens is a real-time monitoring system when the UV-C LED detects a decrease in sterilization performance. Clean the inside of the decanter UV disinfection device,
The pressure flotation tank using a microbubble generating device, characterized in that the outer wall or an additional screw-shaped rotating body is formed in the direction of the outlet side through which the microbubbles in the dissolution tank 20 and the air bubble tank 30 are discharged. . delete According to claim 1,
The air bubble tank 30 is a pressurized flotation tank using a microbubble generator, characterized in that it has a pressure collision type venturi nozzle capable of uniformly mixing microbubbles with wastewater at high pressure and high concentration. delete According to claim 1,
The air suction pipe 11 of the pump 10 is installed with a length higher than the height of the pressurized flotation tank to prevent backflow. delete According to claim 1,
The liquid pipe 12,
A pressurized flotation tank using a microbubble generator, characterized in that the priming water flows in from the outside as the priming water inlet. delete

Images