KR102380936B1 - Dissolved gas discharging apparatus and dissolved gas discharging method using the same - Google Patents

Abstract

The present invention relates to a device for discharging dissolved gas and a method for discharging dissolved gas using the same, and more particularly, to a housing having a cover formed thereon; a bubble generator installed inside the housing; and a reduced pressure formed through the upper portion of the cover. The roof tile, the liquid is stored inside the housing, including a head space formed between the upper surface of the liquid and the lower surface of the cover, wherein the pressure reducer includes an inlet through which compressed air is introduced on one side, and spaced apart from the inlet. and an outlet through which the compressed air is discharged is formed, and compressed air is introduced into the inlet to depressurize the head space.

Description

Dissolved gas discharge device and dissolved gas discharge method using the same

The present invention relates to an apparatus for discharging dissolved gas and a method for discharging dissolved gas using the same, and more particularly, by dispersing microbubbles in cavitation and depressurizing the head space by a decompressor to remove unnecessary dissolved gases in liquids generated in the manufacturing process of food and beverages, etc. Dissolved gas discharging device for extending the liquid circulation and storage life by removing in advance, and to a dissolved gas discharging method using the same.

In general, if the dissolved gas contained in the liquid is not removed during the manufacturing process of food and beverage, etc., after shipment of the product, the product is deteriorated due to the growth of mold in the liquid at room temperature or causes a change in taste. lifespan may be shortened.

Therefore, conventionally, as a method to solve this problem, a process called filtering or heating and evaporation and vacuum degassing has been used.

Recently, a device for removing dissolved oxygen using cavitation has been developed, and cavitation is a phenomenon in which a minute part of a liquid is vaporized while surrounded by a liquid, also called cavitation or cavitation. Occurs when the pressure of the liquid becomes less than the vapor pressure of the liquid at some part of the solid surface. It occurs in the impeller of a pump or the screw of a ship.

The bubbles generated by the cavitation cause serious damage to the propeller of the ship or the impeller of the pump as they collapse, and the temperature generated when the bubbles generated by the cavitation collapse are thousands of degrees or more, and the pressure is also known to be hundreds of atmospheres or more, This high-density energy is transmitted to the surroundings in the form of a shock wave, and when the bubble is destroyed, water molecules are decomposed into OH radicals and H radicals by thermal decomposition.

In addition, in the process of thermal decomposition, molecular bonds of difficult-to-decomposable substances are broken and decomposed or oxidized by OH radicals, and the water temperature may rise.

On the other hand, 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 includes water treatment in the narrow sense described above. However, it is used in a broad sense including all manipulations to water, such as heating to increase the temperature of water.

As an example of water treatment in a narrow sense, a treatment that fundamentally reduces the amount of sludge generated in sewage treatment plants and wastewater treatment plants by solubilizing sludge using fine bubbles generated by cavitation, and methane gas generation by solubilizing sludge at the front end of anaerobic digesters Treatment that maximizes the temperature, strong local high pressure, high temperature effect, and treatment to kill Legionella in cooling tower using OH radical, a strong oxidizer Decomposition treatment may be mentioned as an environmentally friendly treatment method rather than a method.

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

Republic of Korea Patent Publication No. 10-1247110

The present invention has been devised to solve the above problems, and an object of the present invention is to remove unnecessary dissolved gases existing in liquids such as food and beverages to extend the distribution and storage life of products, and a device for discharging dissolved gas and the same It is to provide a method for discharging dissolved gas used.

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

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

a bubble generator installed inside the housing;

a head space in which a liquid is stored in the housing, the head space being formed between the liquid upper surface and the lower surface of the cover;

It characterized in that it includes; a pressure reducer installed through the upper portion of the cover and lowering the pressure of the head space to less than atmospheric pressure.

In addition, the bubble generator,

filter and

a submersible pump in communication with the filter;

It is characterized in that it comprises a cavitator in communication with the submersible pump.

In addition, the cavitator,

A communicating cylinder formed on one side of the submersible pump,

a rotating shaft installed in the longitudinal direction inside the communication cylinder;

a flow path fixture inserted into the rotating shaft and fixed to the inner circumferential 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 is characterized in that it rotates in reverse with respect to the axis of rotation.

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

Filling the liquid into the housing, but forming a head space between the liquid upper surface and the lower surface of the cover;

sealing the housing with the cover;

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

driving the pressure reducer by injecting compressed air into the pressure reducer;

generating a large amount of microbubbles from the cavitator connected to the submersible pump, diffusing and trapping the dissolved gases existing in the liquid and raising them to the head space;

lowering the pressure in the head space by the pressure reducer to below atmospheric pressure;

and removing the dissolved gas by depressurizing the dissolved gas rising into the head space.

In addition, the liquid is characterized in that 60 ~ 90% fresh water inside the housing.

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

In addition, after the microbubbles that capture 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 air through a vent to effectively discharge the dissolved gas in the housing has the effect of making

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 cavitator of the present invention,
3 is an operation conceptual diagram showing an operating state of the cavitator of the present invention;
4 is a step-by-step flow chart according to the method for discharging dissolved gas using the apparatus for discharging dissolved gas of the present invention.

The following objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments in conjunction with 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 subject matter may be thorough and complete, and that the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

Embodiments described and illustrated herein also include complementary embodiments thereof.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the terms 'comprise' and/or 'comprising' do 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 explain and help the understanding of the invention. However, a reader having enough knowledge in this field to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that in describing the invention, parts that are commonly known and not largely related to the invention are not described in order to avoid confusion in describing the invention.

1 is a view showing a dissolved gas discharging device of the present invention, FIG. 2 (a) is a perspective view illustrating a bubble generator of the present invention, and FIG. 2 (b) is a perspective view showing the inside of the cavitator of the present invention , Figure 3 is an operational conceptual diagram showing the operating state of the cavitator of the present invention.

1 to 3 , the present invention is largely configured to include a housing 100 , a bubble generator 200 , and a pressure reducer 300 .

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

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

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 in the vertical direction, or a cap covering the upper outer peripheral surface of the housing 100 is installed so that the inside of the housing 100 is completely sealed. A handle 111 is installed on the upper portion of the cover 110 so that an operator can easily open and close the cover 100 by 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 supply 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 and operated 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 submersible pump 220 installed in communication with the filter 210, and installed in communication with the submersible pump 220 and a cavitator 230 that is

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

The filter 210 is a strainer (Strainer), a metal mesh is installed on one side to filter out foreign substances and rust, etc., to prevent intrusion into the bubble generator 200, submerged pump 220 and cavitator (230) It is possible to extend the life of the bubble generator 200, it is possible to prevent the bubble generation efficiency from being lowered.

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 a communication cylinder inserted into the rotation shaft 232 ( 231) a flow path fixture 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 fixture 233, and installed spaced apart from each other by a predetermined distance. configuration including.

In addition, the first blade 234 and the second blade 235 rotate in opposite directions with respect to the rotation shaft 232 to generate a large amount of microbubbles while the particles of the liquid 130 collide at an appropriate flow rate. will create

At this time, a plurality of concavo-convex portions 236 are formed on one end surface of the first and second blades 234 and 235, and the first and second blades 234 and 235 are respectively formed in different directions for reverse rotation, The passage fixture 233 is formed with an opening 237 having four open sides in the circumferential direction.

The concave-convex 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 concave-convex portion 236 is bent in either a right angle or an oblique direction. It can be formed by bending.

The fluid delivered from the submersible pump 220 passes through the opening 237 of the flow path fixture 233 and is broken into pieces, and the fluid that has passed through the opening 237 is rotated. After contact with the concavo-convex portions 236 of the first and second blades 234 and 235, the microbubbles are generated by further brittleness due to mutual frictional force.

In addition, protrusions or grooves are formed on one end surface of the concave-convex portion 236 to increase the friction area with the fluid to increase the amount of microbubbles.

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 side and compressed air is introduced into the housing 100 , the power of the pressure reducer 300 is turned on to the pressure reducer 300 . is operated to depressurize the head space 120 , and when the input of compressed air is stopped, the power of the pressure reducer 300 is turned OFF to stop the operation of the pressure reducer 300 .

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

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

The outlet 320 may lower the pressure applied to the housing 100 by discharging a portion of the compressed air inside the housing 100 when the compressed air is input at an appropriate pressure or more from the inlet 310, and the It can be utilized as a means for partially discharging the dissolved gas decompressed in the head space 120 .

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

Therefore, when the dissolved gas exhaust process according to the present invention is described, the head space 120 is depressurized using the compressed air of the decompressor 300 , and the liquid 130 is operated by the operation of the bubble generator 200 . After the existing dissolved gas is raised to the side of the depressurized head space 120, dissolved oxygen is removed from the depressurized head space 120, and the removed dissolved oxygen is the outlet 320 of the decompressor 300. It is exhausted through the, and is discharged through the vent 140 as necessary.

In addition, a pressure gauge for measuring the pressure and a flow meter for checking the amount 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 It is possible to prevent harmful substances in the atmosphere from flowing into the housing 100 by installing the .

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

4 is a step-by-step flowchart according to the method for discharging dissolved gas using the apparatus for discharging dissolved gas of the present invention.

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

At this time, it is preferable that the liquid 130 is 60 to 90% fresh water in the housing 100 .

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

Then, power is applied to the bubble generator 200 provided on the inner bottom surface of the housing 100 to drive the submersible pump 220. (S30)

After that, when compressed air is put into the pressure reducer 300, the power source of the pressure reducer 300 is turned on to drive the pressure reducer 300 (S40).

Then, power is supplied to the bubble generator 200 provided on the inner bottom surface of the housing 100 to drive the submersible pump 220, and a large amount of microscopic Bubbles are generated, and the dissolved gases existing in the liquid 130 are diffusely captured and raised to the top of 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 below atmospheric pressure, and decreases while reducing the pressure to 0.7 to 0.1 atm. (S60)

Then, the dissolved gas is removed by decompressing the dissolved gas that has risen to the head space. (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 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 that enters the liquid is proportional to the partial pressure of that gas.

The means for removing the dissolved gas that has entered the liquid is to provide a space lower than the corresponding partial pressure.

To this end, as shown in FIGS. 2 to 3, in a state in which the inside of the housing 100 is decompressed, the submerged pump 220 of the bubble generator 200 provided on the lower surface of the housing 100 is operated to communicate with the cavitator 100 ) in the first and second blades 234 and 235 rotate in opposite directions according to the flow of the flow rate, so that particles of the liquid collide at an appropriate flow rate to generate a large amount of microbubbles.

At this time, 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.

3, if the flow rate is increased with the submersible pump 220, the bubble number decreases, and accordingly, the film thickness of the bubbles generated as the vapor pressure difference 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 microbubbles only by the difference in vapor pressure of the liquid using the cavitation effect, and has a thin film thickness compared to the surface area of the bubble, so that the dissolved gas in the liquid is diffused into the microbubbles By increasing the speed, it was possible to achieve degassing efficiency of 95% or more 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, the radius “R _B ” and surface tension” of the bubbles generated in the liquid

” and the pressure difference (

), the following equation is derived according to the equilibrium equation of the force.

(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, the cavitation number is applied to the generation of bubbles according to the cavitation effect in the existing hydrodynamic category, but the difference in static pressure used in Equation (1) is used to generate bubbles according to the present invention.

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

(2)

(2)

”는 액체의 밀도를 표시하며, “

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

” indicates the density of the liquid, and “

” indicates the flow rate of the liquid in the communicating cylinder 231 of the cavitator 230 of the present invention.

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

(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 ” indicates the diffusion coefficient of the dissolved gas in the liquid, “AB” is the surface area of the cavitation microbubbles, “

” means the difference in concentration between the dissolved gas in the liquid and the bubble, and “t” in parentheses indicates the time (seconds).

3, as shown in Equation (2), when the flow rate is increased with the submersible pump 220, the bubble number decreases. Accordingly, the film thickness of the bubble generated as a vapor pressure difference is Since it becomes thinner and the diffusion rate of the dissolved gas increases according to the first law of diffusion of Fix, there is an effect of more efficiently discharging unnecessary dissolved gases in the liquid to the outside air.

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

As an example, the present inventor's dissolved gas discharge device is applied to dissolved oxygen in 1 ton of water at 20°C, and the cavitation bubble generation rate and dissolved oxygen emission due to dissolved oxygen diffusion are calculated.

When passing through the hydrodynamic cavitator 230 at a flow rate of 3 m/s from the submerged pump orifice (effective diameter 5 mm) of the communicating cylinder 231 with a diameter of 10 mm, the number of bubbles and dissolution due to diffusion Calculate the oxygen emission.

”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 Equation (1) above, the radius of the vapor pressure bubble “

"Is

has a value of Now applying Equation (2) to calculate the film thickness of the cavitator microbubbles, the bubble film thickness ”

"Is

has a value of

“는

이 되며, 기포의 질량 ”

“는

의 값을 갖는다. 이 경우, 초당 미세 기포의 개수 ”

“를 다음과 같이 계산한다.If the mass of water discharged from the cavitator and the mass of air bubbles are obtained based on the above values, the flow rate of water discharged from the cavitator is ”

"Is

, and the mass of the bubble ”

"Is

has a value of In this case, the number of microbubbles per second ”

“ is calculated as:

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

Calculate ”.

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

”는 이상 기체 방정식을 적용하여 다음과 같이 계산된다.Number of moles (mol) 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 atm, and “

” is the oxygen solubility index in water, and “

” is the volume of 1 ton of water

is displayed, and “

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

to display

A large amount of cavitation microbubbles are generated by applying the dissolved gas exhaust device of the present invention under the conditions as described above, and the time required to remove more than 95% of dissolved oxygen in 1 ton of water will be estimated.

In the dissolved gas discharge device of the present invention, the number of moles of initial dissolved oxygen in water is obtained by calculating the integral of the change rate of time in Equation (3) with respect to time to generate a large amount of cavitator microbubbles to diffusely capture dissolved oxygen in water and discharge it to the outside air. The amount of change from .

”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 final value. In addition, the time “t” in the above formula was entered as 590 seconds, and 1 ton of water “

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

As a result, it can be confirmed that only 0.9% of oxygen remaining remains after about 10 minutes.

The embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

100: housing 110: cover
120: head space 130: liquid
140: vent 200: bubble generator
201: power supply 202: power line
210: filter 220: submersible pump
230: cavitator 231: communication cylinder
232: rotation shaft 233: euro 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 the upper surface of the liquid 130 and the lower surface of the cover 110, the liquid 130 being stored in the housing 100;
A pressure reducer 300 installed through the cover 110 and installed to lower the pressure of the head space 120 to less than atmospheric pressure;
The bubble generator 200,
a filter 210 and
And a submersible pump 220 in communication with the filter 210,
and a cavitator 230 in communication with the submersible pump 220,
The cavitator 230 is
A communicating cylinder 231 formed on one side of the submersible pump 220, and
A rotary 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;
and a first blade 234 and a second blade 235 coupled to the other side of the rotation shaft 232,
The first blade 234 and the second blade 235 rotate in reverse with respect to the rotation shaft 232,
Dissolved gas discharging apparatus, characterized in that a plurality of concavo-convex portions (236) are formed on one end surfaces of the first blade (234) and the second blade (235).
delete delete delete In the method of discharging dissolved gas of the apparatus for discharging dissolved gas consisting of claim 1,
Filling the liquid 130 into 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 submersible pump 220 by applying power to the bubble generator 200 provided on the inner bottom surface of the housing 100 (S30);
driving the pressure reducer 300 by injecting compressed air into the pressure reducer 300 (S40);
The step ( S50);
The pressure reducer 300 lowering the pressure of the head space 120 to below atmospheric pressure (S60);
Dissolved gas discharging method comprising a; removing the dissolved gas by depressurizing the dissolved gas that has risen to the head space (S70).
6. The method of claim 5,
Dissolved gas discharge method, characterized in that 60 to 90% of the liquid 130 in the step S10 is fresh water inside the housing 100.

Images