KR20200105394A - Dissolved gas discharging apparatus and dissolved gas discharging method using the same - Google Patents

Abstract

The present invention relates to a dissolved gas discharge device and a dissolved gas discharge method using the same. More specifically, the device comprises: a housing having a cover formed thereon; a bubble generator installed inside the housing; a pressure reducer formed through the upper part of the cover; and a headspace formed between an upper surface of a liquid and a lower surface of the cover while the liquid is contained inside the housing, wherein the pressure reducer comprises an inlet to which compressed air is injected on one side and an outlet formed to be spaced apart from the inlet and discharging the compressed air, and the headspace is decompressed by injecting the compressed air into the inlet. Accordingly, the present invention reduces the amount of dissolved gas in the liquid.

Description

Dissolved gas discharge device and method of discharging dissolved gas using the same {DISSOLVED GAS DISCHARGING APPARATUS AND DISSOLVED GAS DISCHARGING METHOD USING THE SAME}

The present invention relates to a dissolved gas discharge device and a method of discharging dissolved gas using the same, and more particularly, by diffusing microbubbles in cavitation and decompressing the head space by a pressure reducer, unnecessary dissolved gases in the liquid generated in the manufacturing process such as food and beverage are removed. The present invention relates to a dissolved gas discharge device for prolonging the circulation and storage life of a liquid by removing it in advance, and a dissolved gas discharge method using the same.

In general, if the dissolved gas contained in the liquid is not removed during the manufacturing process of food and beverages, after the product is shipped, it is deteriorated by the growth of mold in the liquid at room temperature or changes in taste. Life is bound to be shortened.

Therefore, conventionally, processes such as filtering or heating and evaporation and vacuum degassing have been used as methods to solve this problem.

Recently, a device for removing dissolved oxygen using cavitation is being developed, and cavitation is a phenomenon in which a small part of a liquid is evaporated while surrounded by liquid, and is also called cavitation or cavitation, and when the relative velocity between the individual and the liquid is very large. It occurs when the pressure of the liquid on a part of the solid surface becomes less than the vapor pressure of the liquid. It occurs in the impeller of the pump or the screw of the ship.

As the bubbles generated by the cavitation collapse, they seriously damage the propeller of the ship or the impeller of the pump, and the temperature generated when the bubbles generated by the cavitation collapse is several thousand degrees or more, and the pressure is known to be more than several hundred atmospheres. This high-density energy is transmitted to the surroundings in the form of a shock wave, and when bubbles are destroyed, water molecules are decomposed into OH radicals and H radicals by thermal decomposition, of which OH radicals are known to have strong oxidizing power.

In addition, in the process of pyrolysis, the molecular bonds of hardly decomposable substances are broken and decomposed or oxidized by OH radicals, and the water temperature may rise.

Meanwhile, water treatment refers to treating raw water before treatment according to its purpose.In a narrow sense, it also means purifying water such as sewage treatment or water treatment, but in the present invention, water treatment also includes water treatment in the narrow sense described above. However, it is used in a broad sense to include all operations performed on water, such as heating to increase the temperature of the water.

As an example of water treatment in a narrow sense, it is a treatment that solubilizes the sludge using fine bubbles generated by cavitation to fundamentally reduce the amount of sludge generated in sewage treatment plants and wastewater treatment plants, and the amount of methane gas generated by solubilizing sludge in the front of the anaerobic digester Maximizing treatment, strong local high pressure, high temperature effect, and treatment to kill Legionella bacteria in the cooling tower by using OH radical, a strong oxidizing agent, chemical treatment of non-degradable substances that are biologically difficult to treat such as chromaticity substances and TCE in wastewater It is an environmentally friendly treatment method rather than a method of decomposition.

However, with such a conventional method of removing dissolved oxygen, filtering is 65%, and the removal efficiency by heating and evaporation is only about 50%, and vacuum degassing, which is said to be the most efficient, can reach 50% to 90%. There was a problem that the time and power required for degassing were inevitably large.

Korean Patent Publication No. 10-1247110

The present invention was conceived to solve the above-described problems, and an object of the present invention is a dissolved gas discharge device for extending the distribution and storage life of the product by removing unnecessary dissolved gases present in liquids such as food and beverage, and It is to provide a method of discharging the used dissolved gas.

The objects of the embodiments of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. .

According to a feature for achieving the object as described above, the housing is formed with a cover on the top;

A bubble generator installed inside the housing;

A head space formed between an upper surface of the liquid and a lower surface of the cover, wherein the liquid is fresh water in the housing;

And a pressure reducer installed through the upper portion of the cover and lowering the pressure of the head space below atmospheric pressure.

In addition, the bubble generator,

With filter,

A submerged pump in communication with the filter,

It characterized in that it comprises a cavitation in communication with the submerged pump.

In addition, the cavitation,

A communication cylinder formed on one side of the submerged pump,

A rotating shaft installed in the longitudinal direction inside the communication cylinder,

A flow path fixing device inserted into the rotation shaft and fixed to the inner peripheral surface of the communication cylinder,

It characterized in that it comprises a first blade and a second blade coupled to the other side of the rotation shaft.

In addition, the first blade and the second blade are characterized in that the rotation is mutually reversed with respect to the axis of rotation.

In addition, in the dissolved gas discharge method of the dissolved gas discharge device,

Freshwatering a liquid inside the housing, and forming a head space between an upper surface of the liquid and a lower surface of the cover;

Sealing the housing with the cover;

Driving the submerged pump by applying power to a bubble generator provided on the inner bottom surface of the housing;

Driving the pressure reducer by introducing compressed air into the pressure reducer;

Generating a large amount of microbubbles from the cavities connected to the submerged pump, diffusing and capturing the dissolved gases present in the liquid to rise above the head space;

Lowering the pressure of the head space below atmospheric pressure by the pressure reducer;

And removing the dissolved gas by decompressing the dissolved gas raised to the head space.

In addition, the liquid is characterized in that 60 to 90% freshwater inside the housing.

According to the dissolved gas discharge device and the dissolved gas discharge method using the same according to the present invention, the bubble generator installed inside the housing generates a large amount of micro bubbles, and the pressure in the head space is lowered by a pressure reducer installed on the upper part of the cover. There is an effect of reducing the amount of dissolved gas in the liquid by reducing the pressure.

In addition, after the micro-bubbles trapping the dissolved gas in the liquid move to the head space through the liquid interface, some are exhausted through the outlet of the pressure reducer, and some are exhausted to the outside through a vent to effectively discharge the dissolved gas in the housing. There is an effect of letting go.

1 is a view showing a dissolved gas discharge device of the present invention,
Figure 2 (a) is a perspective view showing a bubble generator of the present invention,
Figure 2 (b) is a perspective view showing the inside of the cavitation of the present invention,
3 is a conceptual diagram showing the operation of the cavitation of the present invention,
Figure 4 is a step-by-step flow chart according to the dissolved gas discharge method using the dissolved gas discharge device of the present invention.

The following objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments related to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

The embodiments described and illustrated herein also include complementary embodiments thereof.

In this specification, the singular form also includes the plural form unless specifically stated in the phrase. As used in the specification, "comprise" and/or "comprising" does not exclude the presence or addition of one or more other components.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific contents have been prepared to more specifically describe the invention and to aid understanding. However, readers who have knowledge in this field enough to understand the present invention can recognize that it can be used without these various specific contents. In some cases, it should be noted in advance that parts that are commonly known in describing the invention and are not significantly related to the invention are not described in order to avoid confusion in describing the invention.

1 is a view showing a dissolved gas discharge device of the present invention, Figure 2 (a) is a perspective view showing a bubble generator of the present invention, Figure 2 (b) is a perspective view showing the inside of the cavitation of the present invention , Figure 3 is a conceptual diagram showing the operating state of the cavitation of the present invention.

As shown in Figures 1 to 3, the present invention is a configuration largely including a housing 100, a bubble generator 200, and a pressure reducer 300.

The housing 100 is desalted in an appropriate amount of liquid 130 such as food and beverage, and about 60 to 90% of the liquid 130 is freshly watered, but the upper surface of the liquid 130 and the cover 110 to be described below It is preferable that fresh water is provided so that a head space 120 for decompression is formed between the lower surfaces.

A discharge valve 101 for discharging the liquid 130 is installed at a lower side of the housing 100 to discharge the liquid 130 from which the dissolved gas has been removed.

In addition, a cover 110 for sealing the inside of the housing 100 is formed on the housing 100.

At this time, the cover 110 is hinged to one side of the housing 100 and rotates vertically, or by installing a cap covering the upper outer circumferential surface of the housing 100 so that the inside of the housing 100 is completely sealed. A handle 111 is installed on the cover 110 so that a worker can easily open and close the cover 100 while holding the handle 111.

In addition, the bubble generator 200 is installed inside the housing 100, is connected to the power supply unit 201 provided on one side of the housing 100, and the power line 202 connected to the power supply unit 201 is at the top It is installed through the cover 110, and a bubble generator 200 is installed at the end of the power line 202 to operate simultaneously with the supply of power, thereby generating a large amount of bubbles in the liquid 130.

In more detail, the bubble generator 200 has a filter 210 installed on one side, a submerged pump 220 installed in communication with the filter 210, and installed in communication with the submerged pump 220 It includes a cavitation 230.

The submerged pump 220 is connected to the power supply unit 201 and is driven simultaneously with the supply of power.

The filter 210 is a strainer, and a metal net is installed on one side thereof to filter out foreign matter and rust, and prevent intrusion into the bubble generator 200 to prevent the submerged pump 220 and the cavator 230 It is possible to extend the life of the bubble generator 200, it is possible to prevent the bubble generation efficiency from being deteriorated.

The cavitator 230 includes a communication cylinder 231 formed on one side, a rotation shaft 232 installed in the longitudinal direction inside the communication cylinder 231, and is inserted into the rotation shaft 232 and is inserted into the communication cylinder ( 231) a flow path fixing member 233 fixed to the inner circumferential surface, and a first blade 234 and a second blade 235 coupled to the rotation shaft 232 on one side of the flow path fixing member 233, which are spaced apart from each other at a predetermined interval. It is included.

In addition, the first blade 234 and the second blade 235 are rotated in opposite directions with respect to the rotation shaft 232 so that the particles of the liquid 130 collide with each other at an appropriate flow rate, thereby causing a large amount of microbubbles. Will be created.

At this time, a plurality of uneven portions 236 are formed on one end of the first and second blades 234 and 235, and the first and second blades 234 and 235 are formed in different directions for reverse rotation, The passage fixing hole 233 is formed with an opening 237 with four surfaces open in the circumferential direction.

The uneven portion 236 is continuously formed in multiple stages on one end surface of the first and second blades 234 and 235, and the bent portion due to the uneven portion 236 is bent in either a right angle or an oblique direction. It can be formed by bending.

The fluid delivered from the submerged pump 220 passes through the opening 237 of the flow path fixing hole 233 and is broken, and the broken fluid passing through the opening 237 is rotated. After contacting the uneven portions 236 of the 1st and 2nd blades 234 and 235, the microbubbles are generated by breaking more easily due to mutual frictional force.

In addition, a protrusion or groove is formed on one end of the uneven portion 236 to increase a frictional area with a fluid, thereby increasing the amount of fine bubbles generated.

The pressure reducer 300 is formed through the upper portion of the cover 110.

In addition, when the pressure reducer 300 has an inlet 310 formed on one side of the upper portion and the compressed air is injected into the housing 100, the power of the pressure reducer 300 is turned on and the pressure reducer 300 is Is operated to decompress the head space 120, and when the injection of compressed air is stopped, the power of the pressure reducer 300 is turned off, and the operation of the pressure reducer 300 is stopped.

The pressure reducer 300 lowers the pressure of the liquid 130 to less than atmospheric pressure. Preferably, the dissolved oxygen present in the liquid can be decompressed and discharged by reducing the pressure to about 0.7 to 0.1 atmospheres or less, and in the present invention, the pressure reducer 300 may be replaced with a vacuum pump and used.

At this time, the outlet 320 is formed to be spaced apart from the inlet 310 and discharges part of the compressed air.

The discharge port 320 may reduce the pressure applied to the housing 100 by discharging part of the compressed air inside the housing 100 when the compressed air is input at the input port 310 or more, and the It can be used as a means for discharging some of the dissolved gas decompressed in the head space 120.

At this time, a vent 140, which is a safety outlet, is installed on one side of the upper portion of the cover 110, and the vent 140 can safely discharge the dissolved gas depressurized in the head space 120 as necessary.

Therefore, when explaining the dissolved gas exhaust process according to the present invention, the head space 120 is decompressed using the compressed air of the pressure reducer 300, and the inside of the liquid 130 by the operation of the bubble generator 200 After raising the existing dissolved gas toward the decompressed head space 120, dissolved oxygen is removed from the depressurized head space 120, and the removed dissolved oxygen is discharged from the outlet 320 of the pressure reducer 300. It is exhausted through and, if necessary, through the vent 140.

In addition, a pressure gauge for measuring pressure and a flow meter for checking the discharge of dissolved gas are additionally installed on one side of the vent 140 to check the pressure and flow rate of the dissolved gas in real time, and a check valve on one side of the vent 140 By installing, it is possible to prevent harmful substances in the atmosphere from flowing into the housing 100.

Hereinafter, a method of discharging a dissolved gas using a dissolved gas discharging apparatus according to the present invention will be described in detail.

Figure 4 is a step-by-step flow chart according to the dissolved gas discharge method using the dissolved gas discharge device of the present invention.

As shown in FIG. 4, during the manufacturing process of food and beverage, the liquid 130 before the dissolved gas treatment is freshly watered into the housing, and a head space 120 is formed between the upper surface of the liquid 130 and the lower surface of the cover 110. To form. (S10)

In this case, it is preferable that the liquid 130 is freshly watered in 60 to 90% inside the housing 100.

Thereafter, the upper portion of the housing 100 is sealed with the cover 110 (S20).

Then, the submerged pump 220 is driven by applying power to the bubble generator 200 provided on the inner bottom of the housing 100 (S30).

Thereafter, when compressed air is injected into the pressure reducer 300, the power of the pressure reducer 300 is turned ON, thereby driving the pressure reducer 300 (S40).

In addition, power is supplied to the bubble generator 200 provided on the inner bottom surface of the housing 100 to drive the submerged pump 220, and a large amount of fine particles from the cavitation unit 230 connected to the submerged pump 200 Bubbles are generated and the dissolved gases present in the liquid 130 are diffusely captured and raised onto the head space 120 outside the interface of the liquid 130 (S50).

Thereafter, the pressure reducer 300 lowers the pressure of the head space 120 to less than atmospheric pressure, while reducing the pressure to less than 0.7 to 0.1 atmospheric pressure (S60)

Then, the dissolved gas raised to the head space is decompressed to remove the dissolved gas (S70).

Finally, by discharging the dissolved gas removed after the step S70 to the outside through the vent 140, the concentration of the dissolved gas in the liquid 130 can be rapidly reduced (S80).

That is, in order to discharge the dissolved gas in the liquid 130 to the outside air without external help, microbubbles are formed in the liquid 130, and the dissolved gas is diffused and introduced into the microbubbles. According to Henry's Law, when a gas comes into contact with the surface of a liquid, the amount of gas entering the liquid is proportional to the partial pressure of that gas.

The means to remove the dissolved gas that has entered the liquid is to provide a space below the corresponding partial pressure.

For this, as shown in Figs. 2 to 3, while the inside of the housing 100 is depressurized, the submerged pump 220 of the bubble generator 200 provided on the bottom of the housing 100 is operated to communicate with the cavitator 100. ) Inside the first blade 234 and the second blade 235 rotate in opposite directions according to the flow of the flow rate, and the liquid particles collide with each other at an appropriate flow rate, thereby generating a large amount of microbubbles.

In this case, since the generated microbubbles are formed only by the difference in vapor pressure of the liquid, dissolved gases having a relatively high partial pressure in the liquid are easily diffused and introduced into the microbubbles.

If described in more detail with reference to FIG. 3, when the flow rate is increased by the submerged pump 220, the bubble number decreases, so that the film thickness of the bubbles generated as a difference in vapor pressure becomes thinner, and the diffusion of the fix. According to the first law, the diffusion rate of the dissolved gas increases, so that unnecessary dissolved gases in the liquid are more efficiently discharged to the outside air.

Dissolved gas discharge device of the present invention generates a large amount of fine bubbles only by the difference in vapor pressure of the liquid by using the cavitation effect, and has a thin film thickness compared to the outer area of the bubbles, so that the dissolved gas in the liquid diffuses into the corresponding fine bubbles. By increasing the speed, the degassing efficiency up to 95% or more can be achieved in a short time.

The theoretical background of the present invention to have the above-described degassing efficiency will be described in detail as follows.

” 그리고 압력 차(

)에 대한 힘의 평형식에 따르면 다음과 같은 방정식이 도출된다.First of all, the radius “R _B ”and the surface tension“

And the pressure difference(

According to the force balance equation for ), the following equation is derived.

(1)

(One)

”는 기포 내의 압력이고, “

”는 액체 내의 압력을 표시한다.In the above equation, “

”Is the pressure in the bubble, and“

”Indicates the pressure in the liquid.

“ 와 동적 압력의 비로서 다음과 같은 기포지수(Bubble Number) “B_N”를 사용하여, 해당 기포의 막 두께 “t_B ”와 기포 반경 “R_B”의 관계식을 도출하였다.On the other hand, a cavitation number is applied to the generation of bubbles according to the cavitation effect in the existing fluid mechanics category, but the difference in static pressure used in Equation (1) above for generation of bubbles according to the present invention “

Using the following bubble number “B _N ”as the ratio of“ and dynamic pressure,” the relationship between the film thickness “t _B ”and the bubble radius “R _B ” of the corresponding bubble was derived.

(2)

(2)

”는 액체의 밀도를 표시하며, “

”는 본 발명의 캐비테이터(230)의 연통실린더(231) 내의 액체의 유속을 표시한다.In the above equation “

”Indicates the density of the liquid,“

"" indicates the flow rate of the liquid in the communication cylinder 231 of the cavitator 230 of the present invention.

In addition, the diffusion rate “R(t)” of the dissolved gas in the liquid of the present invention into the cavitation microbubbles was applied to the Fick's 1 ^st Law of Diffusion as follows.

(3)

(3)

”는 액체 내에서의 용존가스와 기포 내의 농도 차이를 의미하며, 괄호 속의 “t”는 시간(초)를 표시하고 있다.In the above formula, “D” represents the diffusion coefficient of the dissolved gas in the liquid, “A _B ”is the surface area of the cavitation microbubbles, and“

"" means the difference between the dissolved gas in the liquid and the concentration in the bubble, and the "t" in parentheses indicates the time (second).

Referring to FIG. 3 in more detail, as shown in Equation (2), when the flow rate is increased with the submerged pump 220, the bubble number decreases. Accordingly, the film thickness of the bubbles generated as the vapor pressure difference decreases. It becomes thinner and increases the diffusion rate of the dissolved gas in accordance with the first law of diffusion of the fix, so that unnecessary dissolved gases in the liquid are more efficiently discharged to the outside air.

The novelty of the technical idea of the present invention and the patentability of the technology will become more evident through the following specific examples.

As an example, the dissolved oxygen in 1 ton of water at 20°C is applied to the dissolved gas discharge device of the present invention, and the generation rate of cavitation bubbles and the dissolved oxygen discharge due to the diffusion of dissolved oxygen will be calculated.

Dissolution due to the number and diffusion of bubbles when passing through the hydrodynamic cavator 230 at a flow rate of 3 m/s from the submerged pump orifice (effective diameter 5 mm) of the communication cylinder 231 with a diameter of 10 mm. Calculate oxygen emissions.

”은 2.339 kPa이고, 표면장력 “

”는 0.0728 N/m 이며, 물에서의 용존산소의 용해도 지수 “

”는 0.09이다. 상기 식(1)을 사용하면 증기압 기포의 반경 “

“는

의 값을 갖는다. 이제 식(2)를 적용하여 캐비테이터 미세 기포의 막 두께를 계산하면, 기포 막 두께 ”

“는

의 값을 갖는다.20 ℃ water vapor pressure “

”Is 2.339 kPa, and the surface tension“

”Is 0.0728 N/m, and the solubility index of dissolved oxygen in water“

"Is 0.09. Using the above equation (1), the radius of the vapor pressure bubble “

“The

Has the value of Now, applying equation (2) to calculate the film thickness of the cavitation fine bubbles, the bubble film thickness is ”

“The

Has the value of

“는

이 되며, 기포의 질량 ”

“는

의 값을 갖는다. 이 경우, 초당 미세 기포의 개수 ”

“를 다음과 같이 계산한다.Based on the above values, if the mass of water discharged from the cavitation and the mass of air bubbles are obtained, the flow rate of water discharged from the cavitation is

“The

Becomes, and the mass of the bubble ”

“The

Has the value of In this case, the number of fine bubbles per second ”

"Is calculated as follows.

”를 계산한다.Now, using equation (3), the number of moles of dissolved oxygen in the water diffused into the cavitation microbubbles per second.

Calculate ".

In the above equations, the subscript “B” means bubble, and “W” means water.

”는 이상 기체 방정식을 적용하여 다음과 같이 계산된다.The number of moles of dissolved oxygen in 1 ton of water “

”Is calculated as follows by applying the ideal gas equation.

” 는 대기압인 1기압을 의미하며, “

”는 물에서의 산소 용해도 지수이고, “

”는 물 1톤의 부피

을 표시하며, “

”는 산소의 기체상수이고, “T”는 절대온도

를 표시한다.In the above formula, “

”Means atmospheric pressure, 1 atmosphere,“

”Is the index of oxygen solubility in water, and“

”Is the volume of 1 ton of water

And “

”Is the gas constant of oxygen, and “T” is the absolute temperature

Is displayed.

Under the above conditions, the present invention's dissolved gas discharge device is applied to generate a large amount of cavitation microbubbles, and the time taken to remove more than 95% of dissolved oxygen from 1 ton of water will be estimated.

In the dissolved gas discharge device of the present invention, in order to diffusely capture dissolved oxygen in water and discharge it to the outside air by generating a large amount of cavitation microbubbles, the change rate of time in Equation (3) is calculated as the integral with time, The amount of change from can be obtained.

”는 물속의 산소 가스의 용해도 지수로서 0.09의 값을 가지며, 아래첨자 “I”는 초기 값을 표시하고, “F”는 말기 값을 의미한다. 또한, 상기 식에서의 시간 “t”는 590초를 입력하였으며, 본 발명인 용존가스 배출장치를 활용하여 1 톤의 물 “

” 속의 용존산소를 배기한 결과 해당 물속에는

으로서 대략 10분 만에 0.9 %의 산소 잔량 만 남아 있다는 것을 확인할 수 있다.In the above formula, “

”Is the solubility index of oxygen gas in water, and has a value of 0.09, the subscript “I” indicates the initial value, and “F” indicates the end value. In addition, the time “t” in the above equation was 590 seconds, and 1 ton of water “

”As a result of exhausting the dissolved oxygen in the water,

As a result, it can be seen that only 0.9% of the remaining oxygen remains in about 10 minutes.

Since the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical spirit of the present invention, various equivalents that can replace them at the time of application And it should be understood that there may be variations.

100: housing 110: cover
120: head space 130: liquid
140: vent 200: bubble generator
201: power unit 202: power line
210: filter 220: submerged pump
230: cavitation 231: communication cylinder
232: rotary shaft 233: flow fixture
234: first blade 235: second blade
300: pressure reducer 310: inlet
320: outlet

Claims (6)

A housing 100 having a cover 110 formed thereon;
A bubble generator 200 installed inside the housing 100;
A head space 120 formed between an upper surface of the liquid 130 and a lower surface of the cover 110 while the liquid 130 is freshly watered inside the housing 100;
Dissolved gas discharge device comprising: a pressure reducer (300) installed through the upper portion of the cover (110) and lowering the pressure of the head space (120) to less than atmospheric pressure.
The method of claim 1,
The bubble generator 200,
A filter 210,
Submerged pump 220 in communication with the filter 210,
Dissolved gas discharge device, characterized in that it comprises a cavitation (230) in communication with the submerged pump (220).
The method of claim 2,
The cavitation 230,
A communication cylinder 231 formed on one side of the submerged pump 220,
A rotation shaft 232 installed in the longitudinal direction inside the communication cylinder 231,
A flow path fixture 233 inserted into the rotation shaft 232 and fixed to the inner circumferential surface of the communication cylinder 231,
Dissolved gas discharge device, characterized in that it comprises a first blade (234) and a second blade (235) coupled to the other side of the rotation shaft (232).
The method of claim 3,
Dissolved gas discharge device, characterized in that the first blade (234) and the second blade (235) rotate in reverse to each other based on the rotation shaft (232).
In the dissolved gas discharge method of the dissolved gas discharge device configured in any one of claims 1 to 4,
Fresh watering the liquid 130 in the housing, but forming a head space 120 between the upper surface of the liquid 130 and the lower surface of the cover 110 (S10);
Sealing the housing 100 with the cover 110 (S20);
Driving the submerged pump 220 by applying power to the bubble generator 200 provided on the inner bottom surface of the housing 100 (S30);
Injecting compressed air into the pressure reducer 300 to drive the pressure reducer 300 (S40);
The step of generating a large amount of fine bubbles from the cavitation unit 230 communicated with the submerged pump 200, diffusing and capturing the dissolved gases present in the liquid 130 to rise above the head space 120 ( S50);
Step of lowering the pressure of the head space 120 to below atmospheric pressure by the pressure reducer 300 (S60);
And removing the dissolved gas by decompressing the dissolved gas raised to the head space (S70).
The method of claim 5,
In the step S10, the liquid 130 is a dissolved gas discharge method, characterized in that 60 to 90% fresh water in the housing (100).

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