JP2002306904A - Deaeration device and method for removing gaseous component dissolved in liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently remove a gaseous component contained in a liquid from the start of operation. SOLUTION: A deaeration device has a vacuum tank 1, a suction pump 6 for pumping a liquid out of the vacuum tank 1 so as to make the tank 1 a reduced pressure state, and a throttle nozzle 7 for supplying the liquid to the tank 1 being kept at a reduced pressure state while keeping the vacuum tank 1 at the reduced pressure state. In the deaeration device, the liquid is supplied from the throttle nozzle 7 to the vacuum tank 1 being kept at the reduced pressure state by pumping-out of the liquid by the suction pump 6, and at the same time, the liquid is deaerated in the vacuum tank 1 so as to be separated into a liquid and a gas, and the liquid is discharged from the vacuum tank 1. Further, the deaeration device has a setting position detector for detecting that the level of the surface of the liquid filled in the vacuum tank 1 has been lowered to a setting position positioned at a distance below the throttle nozzle 7, and the liquid is supplied from the throttle nozzle 7 to the vacuum tank 1 when it is detected that the level of the surface of the liquid filled in the vacuum tank 1 has been lowered to the setting position by the setting position detector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degassing apparatus and a degassing method for removing gases such as oxygen, carbon dioxide and nitrogen contained in a liquid.

[0002]

BACKGROUND OF THE INVENTION It has been demonstrated that degassed liquids exhibit very good properties. Utilizing this feature, degassed water is effectively used for food processing, boilers, building red water countermeasures, and the like. When used in food processing, for example, water for juices, drinks, soups, etc., preserving freshness by antioxidation is extremely effective. For this reason, the use amount of food additives such as antioxidants and stabilizers can be reduced,
Alternatively, there is an effect that can be eliminated. In addition, there is an effect of not oxidizing an important amino acid as a umami component. Since the umami is reduced when the amino acid is oxidized, the actual state is that the umami is increased by adding sodium glutamate or a pigment, and the umami is colored in a beautiful color. In addition, when a degassed liquid is used to process frozen foods, tofu, and the like, the quality is improved by an antioxidant effect, and in the production of tofu, the yield is improved and the cost can be reduced. Further, it is reported that onigiri made by cooking rice with a degassed liquid can be stored for about one month without additives.

[0003] Further, when the degassed liquid is used for boiler water, red rust of the boiler can be effectively prevented. On average, 8 ppm of oxygen is dissolved in tap water. The dissolved oxygen oxidizes the metal and causes red rust. When the oxygen concentration of the boiler water is 1 ppm or less, oxidation due to dissolved oxygen can be prevented and the life of the boiler can be extended.

[0004] Furthermore, the degassed liquid is also effective against red water in buildings. Supplying degassed liquid to an elevated aquarium in a building with severe red water causes the red water to disappear within a few days. Further, the degassed liquid has a feature that rice and miso soup can be delicious by the oxidation-reduction power. Drinking the degassed liquid is also effective in health.

[0005] Nowadays, there are many ready-to-eat foods that can be eaten at any time without cooking. However, since these foods are mainly stored for a long time by a method such as freezing and refrigeration, many foods are oxidized with time. ing. Since oxidized foods are not delicious, they are deeply seasoned, and furthermore, a large amount of additives such as preservatives are added, so that it is extremely difficult to make foods preferable for the human body. Oxidized food
It has also been reported to cause various diseases.

FIG. 1 shows an apparatus for producing a degassed liquid exhibiting the above-mentioned extremely excellent physical properties. The conventional apparatus shown in FIG. 1 is a membrane type deaerator in which a number of hollow fiber membranes 2 are connected in parallel inside a vacuum tank 1. Both ends of the hollow fiber membrane 2 are connected to the water chamber 3 of the vacuum tank 1. Hollow fiber membrane 2
Is connected to a vacuum pump 5. In the membrane deaerator having this structure, the pressure in the decompression chamber 4 is reduced by the vacuum pump 5, and water flows into the hollow fiber membrane 2 through the water chamber 3.
The gas contained in the water flowing through the hollow fiber membrane 2 passes through the hollow fiber membrane 2 and is sucked into the decompression chamber 4. The gas in the decompression chamber 4 is
It is discharged to the outside of the vacuum tank 1 by the vacuum pump 5.

The membrane type deaerator shown in FIG. 1 has a feature that water passed through the hollow fiber membrane can be continuously deaerated. However, the deaerator having this structure requires cleaning the hollow fiber membrane with a chemical solution about once a month because the hollow fiber membrane is clogged. is there. Further, since the life of the hollow fiber membrane is about one year, there is a disadvantage that it is necessary to replace the hollow fiber membrane and the running cost is increased. Therefore, there is a disadvantage that the cost of the degassed liquid is increased and a large amount of the degassed liquid cannot be produced at low cost.

Further, the deaerator shown in FIG. 1 has a disadvantage that only fresh water can be deaerated. This is because, for example, when a liquid containing an organic substance or fine powder is used, the hollow fiber membrane is clogged and cannot be degassed. Furthermore, since the hollow fiber membrane is made of plastic, high temperature liquid cannot be degassed. For example, above the softening and melting temperatures of plastic, the hollow fiber membrane made of plastic softens and melts and cannot be used as a membrane capable of separating gas. For this reason, the conventional degassing device shown in FIG. 1 can be used only for extremely limited applications, and has the drawback that various liquids cannot be degassed.

The inventor of the present invention has developed a deaerator shown in FIG. 2 in order to solve such a drawback of the deaerator having this structure. The deaerator shown in FIG. 1 includes a vacuum tank 1, a suction pump 6 connecting the suction side to the vacuum tank 1, and a liquid that is sucked by the suction pump 6 and is supplied to the vacuum tank 1 in a reduced pressure state. A throttle nozzle 7 for supplying is provided. In this deaerator, while the suction pump 6 sucks the liquid from the vacuum tank 1 to reduce the pressure, the liquid is supplied from the throttle nozzle 7 and the liquid is degassed in the vacuum tank 1 to separate the liquid and the gas. . That is, the deaerator having this structure discharges the liquid from the vacuum tank 1 by the suction pump 6 and supplies the liquid from the throttle nozzle 7 to deaerate the vacuum tank 1 while maintaining the vacuum tank 1 in a reduced pressure state. Can produce degassed liquid.

[0010]

However, the degassing apparatus shown in FIG. 2 has a drawback that the degassing efficiency of the liquid deteriorates at the beginning of starting the suction operation from the vacuum tank. This is because the liquid level in the vacuum tank is increased at the beginning of operation. When the liquid is sprayed from the throttle nozzle to the vacuum tank having a high liquid level, the time required for the sprayed liquid to pass through the reduced-pressure air is shortened. When the fine liquid particles sprayed from the throttle nozzle fall in the reduced-pressure air, the gas contained therein moves to the surface and is removed. Therefore, if the falling time of the liquid of the sprayed fine particles is short, the efficiency of removing the gas contained in the liquid is deteriorated.

[0011] The present invention has been developed with the aim of further solving this drawback. An important object of the present invention is to provide a deaerator and a deaeration method for removing a gas component dissolved in a liquid that can efficiently remove a gas component contained in the liquid from the beginning of operation.

[0012]

According to the present invention, there is provided a deaerator for removing a gas component dissolved in a liquid, comprising: a vacuum tank 1;
The suction side is connected to the vacuum tank 1, and the suction pump 6 sucks the liquid from the vacuum tank 1 to reduce the pressure.
A vacuum nozzle 1 is provided in the vacuum tank 1 which is in a reduced pressure state by sucking a liquid by the suction pump 6 and supplies the liquid while maintaining the vacuum tank 1 in a reduced pressure state. The deaerator is
The suction pump 6 sucks the liquid from the vacuum tank 1 to reduce the pressure, and supplies the liquid from the throttle nozzle 7 to the vacuum tank 1 which is kept in the reduced pressure state, degass the liquid in the vacuum tank 1 and separates the liquid and the gas. The liquid is separated and the liquid is discharged from the vacuum tank 1. Further, the degassing device includes a set position detector for detecting a liquid level. This set position detector is a position where the liquid in the vacuum tank 1 is sucked out by the suction pump 6 and the liquid level of the vacuum tank 1 is at a position separated from the throttle nozzle 7 downward, and is set at a predetermined set position. Detect that it has dropped to The deaerator detects that the liquid level of the vacuum tank 1 has dropped to the set position with the set position detector, and the throttle nozzle 7 supplies the liquid to the vacuum tank 1.

The set position detector can be a liquid level sensor 14. The liquid level sensor 14 preferably includes an upper limit sensor 14A, which detects that the liquid level has dropped from the liquid level to the set position. The set position detector can set the set position for detecting a decrease in the liquid level to be lower than the discharge lower end of the throttle nozzle 7 by 100 mm or more. The set position detector can also set the set position for detecting a drop in the liquid level to be at least one-fourth the height of the entire vacuum tank below the discharge lower end of the throttle nozzle.

Further, in the degassing apparatus according to the fifth aspect of the present invention, the vacuum tank 1 and the suction side are connected to the vacuum tank 1, and the liquid is sucked from the vacuum tank 1 to be in a reduced pressure state. The vacuum pump 1 is provided with a suction pump 6 and a throttle nozzle 7 for sucking a liquid with the suction pump 6 and being in a depressurized state and supplying the liquid while maintaining the vacuum tank 1 in a depressurized state. In the deaerator, the suction pump 6 is used for the vacuum tank 1
The liquid is supplied from the throttle nozzle 7 to the vacuum tank 1 that sucks the liquid from
Degas the liquid in the vacuum tank 1 to separate the liquid and gas,
The liquid is discharged from the vacuum tank 1. Vacuum tank 1
Has an upper squeezed portion 1a in the upper part for reducing the horizontal cross-sectional area upward. The height of the upper narrowed portion 1a is higher than １ ／ of the height of the entire vacuum tank. Further, a throttle nozzle 7 for spraying the liquid downward is provided at the upper end of the upper throttle 1a.

The throttle nozzle 7 can jet liquid at an angle of 30 to 120 degrees. The upper constricted portion 1a can be tapered. The tapered upper drawing portion 1a has an inclination angle of 15 to 90 degrees with respect to a vertical plane, preferably 20 degrees.
Can be up to 40 degrees. Further, the height of the vacuum tank 1 and the upper narrowed portion 1a is set to 1 / the height of the entire vacuum tank.
It can be 4 to 1/2.

Further, the deaerator preferably includes a plurality of vacuum tanks 1. The degassing device alternately switches a plurality of vacuum tanks 1 to supply a liquid, and continuously degass the liquid in the plurality of vacuum tanks 1.

According to the degassing method of the present invention for removing gas components dissolved in a liquid, the liquid in the vacuum tank
Then, the liquid level in the vacuum tank 1 is lowered from the upper end to a set position where the liquid level is lowered to a reduced pressure state, and then the liquid is sprayed from the throttle nozzle 7 into the reduced pressure air in the vacuum tank 1 and supplied. The liquid sprayed from the throttle nozzle 7 is dropped into the depressurized air in the vacuum tank 1 to separate the contained gas, and the liquid dropped to the lower part of the vacuum tank 1 is sucked by the suction pump 6.
To discharge the gas-separated liquid.

Further, according to a thirteenth aspect of the present invention, in the degassing method, the liquid in the vacuum tank 1 is sucked by the suction pump 6 and the liquid level in the vacuum tank 1 is lowered from the upper end of the vacuum tank 1. Then, the liquid is sprayed and supplied from the throttle nozzle 7 into the depressurized air of the vacuum tank 1 in the depressurized state, and the liquid sprayed from the throttle nozzle 7 falls into the depressurized air in the vacuum tank 1. Then, the contained gas is separated, and the liquid dropped to the lower part of the vacuum tank 1 is sucked by the suction pump 6 to discharge the separated liquid. Further, this deaeration method uses a method in which the upper portion of the upper throttle 1a is squeezed into the depressurized air in the vacuum tank 1 provided with an upper throttle 1a for reducing the horizontal sectional area upward. Is supplied by spraying. The supplied liquid is discharged from the vicinity of the bottom of the vacuum tank 1 by the suction pump 6, and the liquid from which gas has been separated is discharged.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate a degassing device and a degassing method for embodying the technical idea of the present invention, and the present invention does not specify a degassing device and a degassing method below. .

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

Hereinafter, an apparatus and a method for producing a degassed liquid by degassing water will be specifically described. However, the deaerator and the deaeration method of the present invention may be applied to liquids other than water, for example, liquids containing organic substances such as juices and soups, liquids containing fine powders, or viscous liquids such as oil. Can also be used to degas. In particular, the deaerator and the deaeration method of the present invention can effectively deaerate a viscous liquid such as oil, an extremely high-temperature liquid, or a liquid containing an organic substance because a hollow fiber membrane is not used. This is because, without using a hollow fiber membrane, the deaerator is depressurized by a suction pump, and liquid is supplied from a throttle nozzle to deaerate the vacuum tank so as to keep the vacuum tank in a depressurized state.

The degassing device shown in FIG. 3 for removing gaseous components dissolved in a liquid has a vacuum tank 1 for supplying water and degassing, and a suction side connected to the vacuum tank 1. The suction pump 6 sucks water from the vacuum tank 1 to reduce the pressure, and supplies water to the vacuum tank 1 sucked by the suction pump 6 to reduce the pressure while maintaining the vacuum tank 1 in a reduced pressure state. An aperture nozzle 7, a liquid supply device 8 that supplies water to the vacuum tank 1 to discharge gas stored in the vacuum tank 1, and a controller 10 that controls operations of the suction pump 6, the liquid supply device 8, and the like.

As shown in FIG. 4, the vacuum tank 1 is provided with an upper throttle 1a at the upper part. The upper narrowed portion 1a is shaped so that the horizontal cross-sectional area gradually decreases upward. The illustrated vacuum tank 1 has a cylindrical shape as a whole, and is provided with a tapered upper throttle 1a at the upper end of the cylinder. The tapered upper drawing portion 1a has a conical shape, and the inclined surface in the vertical cross section is linear. However, the upper narrowed portion may have a curved inclined surface in a vertical cross section. Although not shown, the upper constricted portion may be a curved surface that projects an intermediate portion of the inclined surface to the outside or a curved surface where the intermediate portion of the inclined surface approaches the inside.

The upper throttle 1a gradually narrows the upper part of the vacuum tank 1. This is for draining the water inside and quickly lowering the liquid level. The upper throttle 1a is not a part for storing water. This is a part where the water sprayed from the throttle nozzle 7 falls into the decompressed air. The height of the upper constricted portion 1a can be increased to lower the liquid level, thereby increasing the total height of the reduced-pressure air. When the decompressed air is low, the time during which the water sprayed from the throttle nozzle 7 falls in the depressurized air becomes short. This reduces the removal rate of gas contained in water. In order to lower the liquid level and increase the reduced air pressure, the upper throttle portion 1a is set to be higher than よ り of the height of the entire vacuum tank. However, when the upper throttle portion 1a is made higher, the internal volume of the entire vacuum tank becomes smaller. Therefore, the upper throttle 1a is １ ／ of the height of the entire vacuum tank.
Lower than In the illustrated vacuum tank 1, the upper narrowed portion 1a is about 1/3 of the whole.

In the illustrated vacuum tank 1, the inclination angle (α) of the tapered upper narrowing portion 1a with respect to the vertical plane is set to about 30 degrees. The inclination angle (α) of the tapered upper drawing portion 1a is 15 to
It can be 60 degrees. The inclination angle (α) of the tapered upper throttle 1a is set to an optimum value in consideration of the solid angle at which the throttle nozzle 7 sprays water and the height of the upper throttle 1a. The inclination angle (α) is set to a value that causes the liquid sprayed in a conical shape from the throttle nozzle 7 to collide against the tank inner surface at a position as low as possible in the vacuum tank 1 and minimizes the internal volume of the upper throttle 1a. Specified. In the vacuum tank 1 shown in the drawing, water jetted at an angle of 60 degrees from a throttle nozzle collides with the inner surface of the vacuum tank 1 at the lower end of the upper throttle 1a.

The apparatus shown in FIG. 3 is provided with two vacuum tanks 1 so that water can be continuously degassed by alternately switching. The two vacuum tanks 1 have water outlets 11 at their bottoms. The outlet 11 is connected to the suction side of the suction pump 6 via a discharge valve 12. Further, each vacuum tank 1 is provided with a level gauge 13 so that the liquid level can be checked from outside.
The illustrated level gauge 13 is a transparent cylinder whose upper and lower ends are connected to the vacuum tank 1. The liquid level of the transparent cylinder is the vacuum tank 1
And the liquid level in the vacuum tank 1 is displayed.

Further, the vacuum tank 1 is provided with a liquid level sensor 14 for electrically detecting the liquid level. The liquid level sensor 14 detects that the liquid filled in the vacuum tank 1
And an upper limit sensor 14A for detecting that the liquid level has dropped from the lower end of the discharge of the throttle nozzle 7 to the set position, and a lower limit sensor 14B for detecting that the liquid level has dropped to the lower limit. That is, in this deaerator, the upper limit sensor 14A is a set position detector that detects that the liquid level has dropped to the set position. The upper limit sensor 14A, which is a set position detector, is disposed in the middle of the vacuum tank 1 and detects that the liquid level of the vacuum tank 1 has dropped from the lower end of the discharge of the throttle nozzle 7 to a predetermined set position. . Lower limit sensor 14B
Is disposed at the bottom of the vacuum tank 1 and detects that the liquid level has dropped to the lower limit. When the suction pump 6 sucks the liquid in the vacuum tank 1 in a state where the vacuum tank 1 is filled with the liquid and the liquid is not supplied from the throttle nozzle 7, the liquid level in the vacuum tank 1 gradually decreases. The upper limit sensor 14A, which is a set position detector, detects that the liquid level has dropped to the set position, and determines the timing at which the throttle nozzle 7 ejects liquid. The set position at which the upper limit sensor 14A detects a decrease in the liquid level is preferably set to be 100 mm or more lower than the discharge lower end of the throttle nozzle 7 or １ ／ or more of the height of the entire vacuum tank. The device for fixing the upper limit sensor 14A so that the set position is at this position increases the time required for the liquid supplied from the throttle nozzle 7 to the vacuum tank 1 to drop to the liquid level, thereby efficiently removing gas components. it can. The liquid level sensor 14 is connected to the controller 10 and transmits an electric signal of the liquid level to the controller 10.

However, the present invention does not specify the set position detector as a liquid level sensor. The set position detector may be any other mechanism that detects that the level of the liquid filled in the vacuum tank has dropped to the set position. The set position detector can be, for example, a timer. The set position detector, which is a timer, starts counting when the suction pump starts sucking liquid from a state in which the vacuum tank is filled with liquid, and after a predetermined time has elapsed, the liquid level has dropped to the set position. Is detected.
Furthermore, the set position detector can also detect that the liquid level has dropped to the set position from the total amount of liquid sucked by the suction pump. This set position detector includes a flow sensor and an arithmetic circuit. The flow rate sensor detects the flow rate of the liquid sucked by the suction pump. The arithmetic circuit is
The flow rate input from the flow rate sensor is integrated to calculate the total amount of liquid sucked from the vacuum tank. The set position detector detects that the liquid level has dropped to the set position when the total amount of liquid sucked from the vacuum tank reaches a predetermined amount. Also in the set position detector having these structures, the set position for detecting a decrease in the liquid level is 100 mm or more lower than the discharge lower end of the throttle nozzle, or lower than 1/4 of the height of the entire vacuum tank. Set to.

At the upper end of the vacuum tank 1, an exhaust port 15 for exhausting accumulated gas, a liquid supply port 16 for supplying degassed liquid when degassing, and a suction connecting the throttle nozzle 7 An opening 17 is provided, and a vacuum manometer 18 for displaying the degree of vacuum is connected. The exhaust port 15 is connected to the liquid sensor 1
Exhaust valve 20 is connected through 9. Liquid sensor 1
9 detects that the liquid has been discharged from the exhaust port 15 and stops supplying the degassed liquid when the gas in the vacuum tank 1 is completely exhausted. Supply port 16
Is connected to the liquid supply machine 8 via the liquid supply valve 21.

The suction nozzle 17 is provided at the suction port 17. The apparatus shown in the figure uses a spray nozzle as the throttle nozzle 7. The spray nozzle supplies the water sucked into the vacuum tank 1 with
Spray in a mist at a predetermined solid angle. The water sucked into the vacuum tank 1 in this state becomes small fine particles and can be deaerated more quickly.

The throttle nozzle 7 is connected to the storage tank 9 via an inflow valve 22. Further, the throttle nozzle 7 is also connected to a water supply through a suction valve 23, a filter 24, and a main valve 25. The throttle nozzle 7 supplies water while keeping the vacuum tank 1 in a reduced pressure state. This is because water cannot be degassed unless the vacuum tank 1 is maintained in a reduced pressure state. The total amount of gas dissolved in water is proportional to pressure. For this reason,
For example, the pressure in the vacuum tank 1 is reduced to about 1/1 of the atmospheric pressure.
When the pressure is reduced to 0, the amount of gas dissolved in water also decreases by about 1/10, although it changes depending on the temperature. About 8p for tap water
pm of oxygen is dissolved. Set the pressure of the vacuum tank 1 to 1
When the pressure is reduced to / 10, the oxygen dissolved in water becomes about 1 ppm
It is as follows. The degree of vacuum in the vacuum tank 1 is determined by the throttle nozzle 7
Can be lowered by narrowing the flow path. However, the smaller the throttle nozzle 7 is, the smaller the amount of water flowing into the vacuum tank 1 is. Therefore, the throttle nozzle 7 is set to a state suitable for the application in consideration of the gas concentration of the degassed liquid and the processing capacity.

The degree to which the pressure in the vacuum tank 1 can be reduced, that is, the degree of vacuum in the vacuum tank 1 also depends on the capacity of the suction pump 6. If a suction pump with a high head is used for the suction pump 6, especially a pump with a large suction head,
Pressure can be reduced. The suction pump 6 uses a cascade pump. The cascade pump has a feature that the pressure in the vacuum tank 1 can be reduced and reduced because the head can be increased.
However, a turbine pump or the like can be used as the suction pump. Turbine pumps have the feature of being able to efficiently suction water from a vacuum tank. Cascade pumps and turbine pumps reduce the pressure in the vacuum tank from 1/5 to 1/20 of atmospheric pressure.
The water can be sucked and discharged while reducing the pressure. A water pump other than the cascade pump and the turbine pump can be used as the suction pump. In the illustrated device, a flow sensor 30 is connected to the discharge side of the suction pump 6. Flow sensor 30
Detects whether the suction pump 6 is discharging the liquid normally. If the suction pump 6 breaks down and the liquid cannot be discharged normally, the flow sensor 30 detects this and stops the operation of the suction pump 6. Furthermore, the operation of the suction pump can be controlled by the flow rate sensor to adjust the flow rate of the suction pump. For example, a flow sensor controls the suction pump to discharge liquid at a constant flow rate. A device that controls the suction pump to a constant flow rate with a flow sensor is suitable for a device having a single vacuum tank.

The deaerator shown in the figure uses a liquid supply pump for the liquid supply machine 8. This liquid supply pump supplies the degassed liquid stored in the storage tank 9 to the vacuum tank 1 when exhausting gas from the vacuum tank 1. When the degassed liquid is supplied from the liquid supply pump, the liquid level of the vacuum tank 1 rises, and the gas stored inside is exhausted. At this time, the liquid feeder 8 is operated until the gas stored in the vacuum tank 1 is completely discharged. This is because if gas remains in the vacuum tank 1, when the liquid in the vacuum tank 1 is discharged by the suction pump 6 and decompressed, the gas greatly expands and the degassing efficiency deteriorates. The apparatus shown in the figure uses a liquid supply pump to supply the degassed liquid stored in the storage tank 9 to the vacuum tank 1 and exhaust the gas. The gas can be prevented from being redissolved in the degassed liquid. The degassed liquid in the storage tank can be supplied to the vacuum tank by using the head and the reduced pressure of the storage tank without using the liquid supply pump. Therefore, the liquid supply machine does not necessarily need to be a pump. The storage tank can also be used as a liquid feeder. Further, the dispenser supplies water to the vacuum tank,
Any mechanism that can exhaust accumulated gas can be used.

The storage tank 9 stores the degassed liquid. The storage tank 9 is connected to the water supply via a start valve 26, a filter 24 and a main valve 25 for initially sucking water. Further, the storage tank 9 is connected to the vacuum tank 1 via an inflow valve 22. The inflow valve 22 controls the flow of the water in the storage tank 9 into the vacuum tank 1. The inflow valve 22 is a valve that can adjust the amount of water that flows in. The storage tank 9 is connected with a pressurizing pump 27 to supply the stored water to the outside. Pressurizing pump 27
Is pumped in a state in which the degassed liquid in the storage tank 9 is sucked and pressurized to the outside.

The controller 10 includes a discharge valve 12, an exhaust valve 20, a liquid supply valve 21, an inflow valve 22, and a suction valve 23.
Is operated as follows, and the degassed liquid is stored in the storage tank 9. Since the deaerator shown in the figure has two vacuum tanks 1, the left vacuum tank 1 in the figure is a first vacuum tank 1A and the right vacuum tank 1 is a second vacuum tank 1B. Further, the throttle nozzle 7, the discharge valve 12, the exhaust valve 20, the liquid supply valve 21, the inflow valve 22, and the suction valve 23 connected to the first vacuum tank 1A are connected to the first throttle nozzle 7
A, a first discharge valve 12A, a first exhaust valve 20A, a first liquid supply valve 21A, a first inflow valve 22A, a first suction valve 23A, and a throttle nozzle 7 connected to a second vacuum tank 1B; 12, exhaust valve 20, liquid supply valve 21, inflow valve 22, suction valve 2
Reference numeral 3 denotes a second throttle nozzle 7B, a second discharge valve 12B, a second exhaust valve 20B, a second liquid supply valve 21B, a second inflow valve 22B, and a second suction valve 23B.

(1) Step of Starting Operation First The main valve 25 is opened, and the inflow valve 22 and the suction valve 23 are closed.
When the start valve 26 is opened in this state, tap water is supplied from the main valve 25 → the filter 24 → the start valve 26 → the storage tank 9
Flowed in. Further, the discharge valve 12 and the liquid supply valve 21
Is closed, and the exhaust valve 20 and the inflow valve 22 are opened, so that water flows in the route of the storage tank 9 → the inflow valve 22 → the vacuum tank 1. When water is supplied through this flow path, first, both vacuum tanks 1 are filled with water. When the vacuum tank 1 is full of water, the water is discharged from the exhaust port 15. When the liquid is discharged from the exhaust port 15, this is detected by the liquid sensor 19. The signal of the liquid sensor 19 is input to the controller 10, and the controller 10 closes the exhaust valve 20. When the liquid level in the storage tank 9 reaches the minimum level, the start valve 26 is closed. The amount of water in the storage tank 9 is detected by a liquid level sensor 28 provided in the storage tank 9.

After a predetermined amount of water has been stored in the storage tank 9, when the vacuum tank 1 is not filled with water, the liquid feeder 8 is operated to remove the water in the storage tank 9 from the vacuum tank 1.
A, 1B. The liquid feeder 8 supplies the water in the storage tank 9 to the vacuum tanks 1A and 1B without passing through the throttle nozzles 7A and 7B, so that the water can be quickly supplied. In this state, when water is supplied to the vacuum tanks 1A and 1B, the water is discharged from the exhaust port 15 when the vacuum tanks 1A and 1B are filled with water. When the liquid is discharged from the exhaust port 15, the liquid sensor 19 detects this, and the controller 10 closes the exhaust valve 20. In this state, both vacuum tanks 1
When A and 1B are filled with water, the start valve 26 is closed.

(2) Step of degassing in the first vacuum tank With the first exhaust valve 20A and the second exhaust valve 12B closed,
The first discharge valve 12A is opened to operate the suction pump 6.
The water in the first vacuum tank 1A is sucked out by the suction pump 6, and the liquid level drops. At this time, since the upper throttle portion 1a is provided in the upper portion of the vacuum tank 1, the liquid level quickly drops. In the first vacuum tank 1A, water is sucked out by the suction pump 6 to be in a reduced pressure state. When the liquid level drops to the set position, the upper limit sensor 14A, which is the liquid level sensor 14, sends a signal to the controller 10. The controller 10
The first inflow valve 22A is opened by the signal of the upper limit sensor 14A.
In this state, water is supplied to the first vacuum tank 1A via the first throttle nozzle 7A. The throttle nozzle 7 sprays water sucked into the vacuum tank 1 in a mist state. As described above, the liquid sprayed conically from the throttle nozzle 7 collides with the inner surface of the tank or the liquid surface at a position lower than the upper throttle portion 1a. In other words, the air is degassed more efficiently by dropping in the decompressed air having a longer overall height for a long time.

Further, with the first inflow valve 22A opened, the suction pump 6 is operated, and as shown by the arrow in FIG. 5, the storage tank 9 → the first inflow valve 22A → the first throttle nozzle 7A → Water is circulated through the path of the first vacuum tank 1A → the first discharge valve 12A → the suction pump 6 → the storage tank 9. In order to circulate the water in this path, the valve through which the water passes is opened. Close other valves that do not allow water to circulate. In this state, the water in the storage tank 9 is circulated to the first vacuum tank 1A,
It is degassed while reducing the pressure in the vacuum tank 1A. The gas degassed from the water accumulates in the first vacuum tank 1A. When water is circulated and degassed in the storage tank 9 and the first vacuum tank 1A for a predetermined time and the liquid level drops to the position of the lower limit sensor 14B, the lower limit sensor 14B sends a signal to the controller 10. The controller 10 closes the first discharge valve 12A by the signal of the lower limit sensor 14B,
The water circulation between the vacuum tank 1A and the storage tank 9 is stopped.

(3) Step of exhausting gas stored in the first vacuum tank and degassing in the second vacuum tank The first exhaust valve 12A and the second liquid supply valve 21B are closed, and the first exhaust valve 20A and the first exhaust valve 20A are closed. With the liquid supply valve 21A opened, the liquid supply pump as the liquid supply machine 8 is operated. The liquid supply pump supplies the degassed liquid stored in the storage tank 9 to the first vacuum tank 1A. The first vacuum tank 1A is supplied with the degassed liquid and rises in liquid level, and exhausts gas stored in the upper part from the first exhaust valve 20A to the outside. When the gas in the first vacuum tank 1A is completely exhausted, water is discharged from the first exhaust valve 20A. The state in which the liquid is discharged from the exhaust port 15 is detected by the liquid level sensor 19. Liquid level sensor 1
9, the controller 10 sets the first exhaust valve 20A
And the first liquid supply valve 21A is closed. In this state, the gas in the first vacuum tank 1A is completely exhausted.

During the above operation, the second exhaust valve 12B is opened and the suction pump 6 is operated with the second exhaust valve 20B closed. The water in the second vacuum tank 1B is
The liquid is sucked by the suction pump 6 and the liquid level drops. In the second vacuum tank 1B, water is sucked out by the suction pump 6 to be in a reduced pressure state. When the liquid level drops to the set position, the upper limit sensor 14A sends a signal to the controller 10. When the controller 10 opens the second inflow valve 22B in response to a signal from the upper limit sensor 14A, water is supplied to the second vacuum tank 1B via the second throttle nozzle 7B. The second throttle nozzle 7B is
The water sucked into the vacuum tank 1B is atomized and sprayed.

Further, with the second inflow valve 22B opened, the suction pump 6 is operated, and as shown by an arrow in FIG. 6, the storage tank 9 → the second inflow valve 22B → the second throttle nozzle 7B → Water is circulated through the route of the second vacuum tank 1B → the second discharge valve 12B → the suction pump 6 → the storage tank 9. In order to circulate the water in this path, the valve through which the water passes is opened. In this state, the water in the storage tank 9 is supplied to the second vacuum tank 1
B and deaerated while reducing the pressure in the second vacuum tank 1B. The gas degassed from the water is supplied to the second vacuum tank 1B
Accumulate in When water is circulated through the storage tank 9 and the second vacuum tank 1B for a predetermined time and degassed, and the liquid level falls to the position of the lower limit sensor 14B, the lower limit sensor 1B
4B sends a signal to the controller 10. The controller 10 uses the signal of the lower limit sensor 14B to output the second discharge valve 1
2B is closed, and the water circulation between the second vacuum tank 1B and the storage tank 9 is stopped.

(4) Step of exhausting gas remaining in the second vacuum tank and degassing in the first vacuum tank The second discharge valve 12B and the first liquid supply valve 21A are closed, and the second exhaust valve 20B and the second With the liquid supply valve 21B opened, the liquid supply pump as the liquid supply machine 8 is operated. The liquid supply pump supplies the degassed liquid stored in the storage tank 9 to the second vacuum tank 1B. The second vacuum tank 1B is supplied with the degassed liquid, the liquid level rises, and the gas accumulated in the upper part is discharged to the second exhaust valve 20B.
Exhaust from B to the outside. When the gas in the second vacuum tank 1B is completely exhausted, water is discharged from the second exhaust valve 20B. The state in which the liquid is discharged from the second exhaust port 15 is detected by the second liquid level sensor 19. In response to the signal from the second liquid level sensor 19, the controller 10 closes the second exhaust valve 20B and the second liquid supply valve 21B. In this state, the gas in the second vacuum tank 1B is completely exhausted.

During the above operation, the first exhaust valve 12A is opened and the suction pump 6 is operated with the first exhaust valve 20A closed. The water in the first vacuum tank 1A is
The liquid is sucked by the suction pump 6 and the liquid level drops. In the first vacuum tank 1A, water is sucked out by the suction pump 6 to be in a reduced pressure state. When the liquid level drops to the set position, the upper limit sensor 14A sends a signal to the controller 10. When the controller 10 opens the first inflow valve 22A in response to a signal from the upper limit sensor 14A, water is supplied to the first vacuum tank 1A via the first throttle nozzle 7A. The first throttle nozzle 7A is
The water sucked into the vacuum tank 1A is atomized and sprayed.

Further, with the first inflow valve 22A opened, the suction pump 6 is operated, and as shown by the arrow in FIG. 5, the storage tank 9 → the first inflow valve 22A → the first throttle nozzle 7A → Water is circulated through the path of the first vacuum tank 1A → the first discharge valve 12A → the suction pump 6 → the storage tank 9. In order to circulate the water in this path, the valve through which the water passes is opened. In this state, the water in the storage tank 9 is supplied to the first vacuum tank 1
A and evacuated while reducing the pressure in the first vacuum tank 1A. The gas degassed from the water is supplied to the first vacuum tank 1A
Accumulate in When water is circulated through the storage tank 9 and the first vacuum tank 1A for a predetermined time and degassed, and the liquid level falls to the level of the lower limit sensor 14B, the first discharge valve 1
Close 2A.

Thereafter, the operations (3) and (4) are repeated to store the degassed liquid in the storage tank 9. The above driving is
The first discharge valve 12A and the second discharge valve 12B are alternately opened and closed to circulate the water in the storage tank 9 to either the first vacuum tank 1A or the second vacuum tank 1B to continuously remove water. I can. Further, while water is being degassed in one vacuum tank 1, the gas remaining in the other vacuum tank 1 can be exhausted, so that the whole can be efficiently degassed.

When using the degassed liquid, the pressure pump 27 is operated. The pressurizing pump 27 pressurizes and supplies the degassed liquid stored in the storage tank 9 to the outside.
When the degassed liquid in the storage tank 9 is discharged and the liquid level decreases, the suction valve 23 connected to the vacuum tank 1 circulating the degassed liquid in the storage tank 9 is opened, and the water supply is stopped. Water is sucked into the vacuum tank 1 from the suction valve 23 and degassed.

In the above method, until the liquid level in the vacuum tank 1 becomes lower than the set position, the throttle nozzle 7
Not supplying liquid from. That is, when it is detected by the upper limit sensor 14A that is the set position detector that the liquid level has dropped to the set position, the supply of the liquid from the throttle nozzle 7 to the vacuum tank 1 is started. However, the liquid can be supplied somewhat from the throttle nozzle 7 until the liquid level of the vacuum tank 1 drops to the set position. This is because even if a small amount of liquid is supplied from the throttle nozzle 7, there is no problem in quickly lowering the liquid level. In this method, for example, until the liquid level in the vacuum tank 1 drops to the set position, the inflow valve 22 is slightly opened to supply a small amount of liquid within a range where the vacuum tank 1 is kept in a reduced pressure state. When the liquid level drops to the set position, the inflow valve 22 is greatly opened to supply a large amount of liquid.

Further, the deaerator of the present invention may have a structure shown in FIG. In the deaerator shown in this figure, a main valve 25 is connected to a throttle nozzle 7 via a suction valve 23. Therefore, this deaerator supplies the water to the vacuum tank 1 without storing water in the storage tank 9 in the step of starting operation first. Further, in the deaerator shown in this figure, a pipe for supplying deaerated liquid is connected to a lower end of the vacuum tank 1 in order to exhaust air in the vacuum tank 1. That is, the degassed liquid supplied from the liquid supply machine 8 is supplied into the vacuum tank 1 from the discharge port 11 provided at the lower end of the vacuum tank 1 via the liquid supply valve 21.
This structure has a feature that the liquid can be supplied to the vacuum tank 1 while keeping the liquid surface in a gentle state, so that the malfunction of the liquid surface sensor 19 can be prevented and the liquid can be reliably exhausted. Furthermore, the deaerator shown in FIG.
And suction pumps 6 are connected separately. That is, the first
The liquid in the vacuum tank 1A passes through the first discharge valve 12A,
The liquid is sucked by the first suction pump 6A and the liquid in the second vacuum tank 1B is passed through the second discharge valve 12B to the second suction pump 6B.
To be able to suck. Since this deaerator also includes two vacuum tanks 1, the liquid can be continuously deaerated while alternately switching the two vacuum tanks 1.

The deaerator of the present invention does not necessarily need to have a plurality of vacuum tanks. It is also possible to provide one vacuum tank and repeat the steps of degassing and exhausting gas with one vacuum tank to obtain a degassed liquid. Further, the apparatus shown in the drawing circulates the degassed liquid in the storage tank 9 and the vacuum tank 1, so that the gas concentration of the degassed liquid stored in the storage tank 9 can be considerably reduced. However, the deaerator of the present invention does not necessarily need to circulate the water in the storage tank to the vacuum tank, for example,
Tap water can be sucked into a decompressed vacuum tank and degassed, and the degassed liquid can be supplied to the outside without being stored in the storage tank. The deaerator having this structure does not require a storage tank.

Further, the deaerator according to the present invention is shown in FIGS.
As shown in (1), a structure in which a vacuum pump 29 is connected to the vacuum tank 1 may be adopted. The deaerator having this structure can suction the liquid in the vacuum tank 1 with the suction pump 6 while continuously evacuating the gas stored in the vacuum tank 1 with the vacuum pump, so that the liquid level can be slowed down. There is. For this reason, as shown in FIG. 8, the liquid can be continuously degassed as a single vacuum tank 1. This apparatus can efficiently deaerate with one vacuum tank 1. However, as shown in FIG. 9, a plurality of vacuum tanks 1 can be connected and degassing can be performed alternately in the vacuum tanks 1. As shown in FIG. 9, a deaerator having a plurality of vacuum tanks 1 supplies water to one of the vacuum tanks 1 in a reduced pressure state to deaerate the vacuum tank 1, and the other vacuum tank 1 is deaerated from a liquid feeder 8. The vaporized liquid can be supplied to exhaust the accumulated gas.

The operation of the vacuum pump 29 is controlled by the controller 10. The controller 10 controls the operation of the vacuum pump 29 based on a signal from the liquid level sensor 14. When the liquid level of the vacuum tank 1 becomes lower than the set position, the controller 10 starts the operation of the vacuum pump 29 by a signal input from the upper limit sensor 14A. Vacuum pump 2
Even in the state where the fuel cell 9 is operated, the liquid level of the vacuum tank 1 gradually decreases. However, since the vacuum pump 29 exhausts the gas in the vacuum tank 1, it is possible to delay a decrease in the liquid level of the vacuum tank 1.

The deaerator shown in FIG. 8 operates as follows to deaerate. (1) Step of Starting Operation First The main valve 25 is opened, and the inflow valve 22 and the suction valve 23 are closed.
If the start valve 26 is opened in this state, the tap water
5 → filter 24 → start valve 26 → reservoir 9 Further, with the discharge valve 12 and the liquid supply valve 21 closed and the vacuum pump 29 operated, the inflow valve 22
Is opened, it flows in the route of the storage tank 9 → the inflow valve 22 → the vacuum tank 1. Water is supplied through this flow path to fill the vacuum tank 1 with water. When the vacuum tank 1 is full of water, this is detected by the liquid sensor 19. The signal of the liquid sensor 19 is input to the controller 10,
The controller 10 stops the operation of the vacuum pump 29. In this state, when the liquid level in the storage tank 9 reaches the minimum level, the start valve 26 is closed. The amount of water in the storage tank 9 is detected by a liquid level sensor 28 provided in the storage tank 9.

When a predetermined amount of water is stored in the storage tank 9 and the vacuum tank 1 is not filled with water,
The liquid feeder 8 is operated to supply water from the storage tank 9 to the vacuum tank 1.
Can also be supplied. The liquid feeder 8 supplies the water in the storage tank 9 to the vacuum tank 1 without passing through the throttle nozzle 7, so that the water can be supplied promptly.

(2) Deaeration Step in Vacuum Tank The operation of the vacuum pump 29 is stopped, the discharge valve 12 is opened, and the suction pump 6 is operated. The water in the vacuum tank 1 is sucked out by the suction pump 6 and the liquid level drops. At this time, since the upper throttle portion 1a is provided in the upper portion of the vacuum tank 1, the liquid level quickly drops. Inside the vacuum tank 1, a suction pump 6
, Water is sucked out and the pressure is reduced. When the liquid level drops to the set position, the upper limit sensor 14A turns on the controller 1
Send a signal to 0. The controller 10 opens the inflow valve 22 in response to a signal from the upper limit sensor 14A. In this state, water is supplied to the vacuum tank 1 through the throttle nozzle 7. The throttle nozzle 7 sprays water sucked into the vacuum tank 1 in a mist state. As described above, the liquid sprayed conically from the throttle nozzle 7 collides with the inner surface of the tank or the liquid surface at a position lower than the upper throttle portion 1a. In other words, the air is degassed more efficiently by dropping in the decompressed air having a longer overall height for a long time. Further, the controller 10 starts the operation of the vacuum pump 29 based on the signal of the upper limit sensor 14A. The vacuum pump 29 exhausts gas degassed from the liquid to be sprayed.

Further, with the inflow valve 22 opened, the suction pump 6 is operated to forcibly suck out the water in the vacuum tank 1 and circulate the water in the storage tank 9. In this step, the water circulates in the route of the storage tank 9 → the inflow valve 22 → the throttle nozzle 7 → the vacuum tank 1 → the discharge valve 12 → the suction pump 6 → the storage tank 9. In order to circulate the water in this path, the valve through which the water passes is opened. In this state, the water in the storage tank 9 is circulated through the vacuum tank 1 and depressurized and degassed in the vacuum tank 1. The gas degassed from the water is continuously exhausted by the vacuum pump 29. However, even when the vacuum pump 29 is operated, the liquid level in the vacuum tank 1 gradually decreases. When the liquid level of the vacuum tank 1 drops to the position of the lower limit sensor 14B while the vacuum pump 29 is operating, the lower limit sensor 14B sends a signal to the controller 10, and the controller 10 closes the discharge valve 12, and the suction pump 6, the operation of the vacuum tank 1 and the storage tank 9 is stopped.
And stop the water circulation.

(3) Step of Supplying Liquid to Vacuum Tank and Exhausting Gas While the vacuum pump 29 is operating, the liquid supply valve 21 is opened,
The liquid supply pump which is the liquid supply machine 8 is operated. The liquid supply pump
The degassed liquid stored in the storage tank 9 is supplied to the vacuum tank 1. The vacuum tank 1 is supplied with the degassed liquid and the liquid level rises. When the liquid is completely filled in the vacuum tank 1, water is discharged from the vacuum pump 29. The state in which the liquid is discharged from the exhaust port 15 is detected by the liquid level sensor 19. With the signal of the liquid level sensor 19,
The controller 10 closes the liquid supply valve 21 and stops the operation of the vacuum pump 29. In this state, the gas in the vacuum tank 1 is completely exhausted. Thereafter, the operations (2) and (3) are repeated to store the degassed liquid in the storage tank 9.

In the above operation, in the step (3), the entire vacuum tank 1 is completely filled with liquid. However, the liquid to be filled is such that the liquid level in the vacuum tank is, for example, the upper limit sensor 14A. It can be supplied until it ascends to the position. This is because the gas in the vacuum tank 1 is evacuated by the vacuum pump 29, so that the vacuum tank 1 can be depressurized.

Further, as shown in FIG. 6, the deaerator connecting the two vacuum tanks 1 operates, for example, when the liquid level of the first vacuum tank 1A decreases, the suction pump 6 is switched to the first pump. Switch from the vacuum tank 1A to the second vacuum tank 1B. No. 1 where the suction pump 6 stops sucking the liquid
The vacuum tank 1A operates the vacuum pump 29A,
The degassed liquid stored in the storage tank 9 is supplied from a liquid supply pump which is a liquid supply machine 8, and the gas is completely exhausted. Further, the deaerator discharges the liquid in the second vacuum tank 1B by the suction pump 6 and switches from the second vacuum tank to the first vacuum tank when the liquid level decreases. Thereafter, this step is repeated to degas the liquid.

The liquid sensor and the liquid level sensor shown in FIG.
Although the liquid level is detected by the electrode, these sensors can also detect the liquid level by an ultrasonic wave or a float.

By the way, the liquid can be heated to increase the degassing efficiency. The apparatus shown in FIG. 2 has a heater 31 connected to the inflow side. As the heater 31, any device capable of heating the liquid, for example, a boiler or the like can be used. The heater can also be connected to the suction side of the vacuum tank. The liquid heated by the heater is efficiently degassed inside the decompressed vacuum tank.

[0062]

The degassing apparatus and the degassing method for removing gaseous components dissolved in liquid according to the present invention have a feature that gaseous components contained in liquid can be efficiently removed from the beginning of operation. That is, the deaerator and the deaeration method of the present invention draws liquid in a vacuum tank with a suction pump, lowers the liquid level in the vacuum tank from a top end to a set position where the liquid level drops from the upper end to a reduced pressure state. This is because the liquid is sprayed from the throttle nozzle into the depressurized air and dropped into the depressurized air in the vacuum tank to separate the contained gas. With this deaerator and deaeration method, the liquid level of the liquid in the vacuum tank is lowered to a set position, then the liquid is sprayed from the throttle nozzle and dropped into the decompressed air, so that the inside of the vacuum tank is sufficiently depressurized. In this state, gas components contained in the liquid can be removed. Moreover,
Since the water sprayed from the throttle nozzle is dropped into the decompressed air where the liquid level has dropped and the total height has become longer, the time for the water sprayed from the throttle nozzle to fall in the depressurized air is extended, The removal rate of gas contained in can be improved. As described above, the degassing apparatus and the degassing method of the present invention can efficiently separate gas components contained in liquid from the beginning of operation. In particular,
In the degassing device according to the first aspect of the present invention, the set position detector can simply and reliably detect that the liquid level of the vacuum tank has dropped to the set position, and supply the liquid from the throttle nozzle.

Further, according to the degassing apparatus of the fifth aspect of the present invention and the degassing method of the thirteenth aspect, the time for stopping the spraying of the throttle nozzle and operating only the suction pump is shortened, and the liquid is discharged from the throttle nozzle. The feature is that the total time of spraying can be extended and gas can be separated from liquid efficiently. This is because the deaerator and the deaeration method use a vacuum tank provided with an upper constriction on the upper part to reduce the horizontal cross-sectional area upward, and draw out the liquid with a suction pump to reduce the pressure. This is because the liquid is sprayed and supplied from the upper part of the upper restrictor to the vacuum tank by the restricting nozzle, and the liquid is degassed by the vacuum tank to separate the liquid and the gas. Since the present invention uses a vacuum tank having an upper constricted portion at the top, the liquid level can be promptly reduced when the liquid is sucked by the suction pump and brought into a reduced pressure state. Furthermore, since the water sprayed from the throttle nozzle is dropped into the decompressed air where the liquid level is lowered and the total height is longer, the time for the water sprayed from the throttle nozzle to fall in the depressurized air is increased. In addition, the removal rate of gas contained in water can be improved. As described above, the deaerator and the deaeration method of the present invention can shorten the time for stopping the spraying of the throttle nozzle by shortening the time for lowering the liquid level, and efficiently separate the gas from the liquid. .

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a conventional membrane type deaerator.

FIG. 2 is a schematic cross-sectional view showing a deaerator previously developed by the present inventors.

FIG. 3 is a schematic sectional view showing a deaerator according to an embodiment of the present invention.

4 is an enlarged sectional view of a vacuum tank of the deaerator shown in FIG.

FIG. 5 is a partial cross-sectional view showing a state in which degassing is performed in a first vacuum tank of the degassing device shown in FIG. 2;

FIG. 6 is a partial cross-sectional view showing a state in which degassing is performed in a second vacuum tank of the degassing device shown in FIG. 2;

FIG. 7 is a block diagram showing a deaerator according to another embodiment of the present invention.

FIG. 8 is a schematic sectional view showing a deaerator according to another embodiment of the present invention.

FIG. 9 is a schematic sectional view showing a deaerator according to another embodiment of the present invention.

[Explanation of symbols]

1: vacuum tank 1A: first vacuum tank 1
B: second vacuum tank 1a: upper throttle section 2: hollow fiber membrane 3: water chamber 4: decompression chamber 5: vacuum pump 6: suction pump 6A: first suction pump 6
B: second suction pump 7: throttle nozzle 7A: first throttle nozzle 7
B: second throttle nozzle 8: liquid feeder 9: storage tank 10: controller 11: discharge port 12: discharge valve 12A: first discharge valve 1
2B: second discharge valve 13: level gauge 14: liquid level sensor 14A: upper limit sensor 1
4B ... Lower limit sensor 15 ... Exhaust port 16 ... Supply port 17 ... Suction port 18 ... Vacuum pressure gauge 19 ... Liquid sensor 20 ... Exhaust valve 20A ... First exhaust valve 2
0B: second exhaust valve 21: liquid supply valve 21A: first liquid supply valve 2
1B: second liquid supply valve 22: inflow valve 22A: first inflow valve 2
2B: second inlet valve 23: suction valve 23A: first suction valve 2
3B: Second suction valve 24: Filter 25: Main valve 26: Start valve 27: Pressurizing pump 28: Liquid level sensor 29: Vacuum pump 30: Flow sensor 31: Heating machine

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Shichijo 1-38 Tatsumi-cho, Anan-shi, Tokushima Prefecture Inside Fujisaki Electric Co., Ltd. (72) Koji Fujisaki 1-38 Tatsumi-cho, Anan-shi, Tokushima Pref. F term (reference) 4D011 AA16 AC03 AD02 AD06 4D037 AA01 AB11 AB12 AB18 BA23

Claims (13)

[Claims] 1. A vacuum tank (1), a suction pump having a suction side connected to the vacuum tank (1), and a suction pump (6) for sucking a liquid from the vacuum tank (1) to reduce the pressure, and a suction pump. (6)
Vacuum tank that sucks liquid and is in a decompressed state
(1) is provided with a throttle nozzle (7) for supplying the liquid while maintaining the vacuum tank (1) in a reduced pressure state, and the suction pump (6) sucks the liquid from the vacuum tank (1) and the vacuum tank (1) Is supplied to the vacuum tank (1) from the squeezing nozzle (7) under reduced pressure, the liquid is degassed in the vacuum tank (1) to separate the liquid and gas, and the liquid is discharged from the vacuum tank (1). A vacuum pump (1) in which the liquid in the vacuum tank (1) is sucked from the vacuum tank (1) by a suction pump.
A set position detector that is sucked out in (6) and detects that the liquid level of the vacuum tank (1) is at a position separated from the throttle nozzle (7) downward and lowered to a predetermined set position. The set position detector detects that the liquid level of the vacuum tank (1) has dropped to the set position, and the throttle nozzle (7) supplies liquid to the vacuum tank (1). A deaerator that removes gas components dissolved in a liquid. 2. The set position detector is a liquid level sensor (14),
2. A degassing device for removing gas components dissolved in a liquid according to claim 1, wherein said liquid level sensor (14) includes an upper limit sensor (14A) for detecting that the liquid level has dropped to a set position. . 3. A set position at which the set position detector detects a decrease in the liquid level is set at a position one position away from the lower discharge end of the throttle nozzle (7).
2. The degassing device according to claim 1, wherein the gas component is set to be lower by at least 00 mm. 4. The apparatus according to claim 1, wherein the set position at which the set position detector detects a decrease in the liquid level is set to be at least ４ of the height of the entire vacuum tank lower than the discharge lower end of the throttle nozzle. A degassing device that removes gas components dissolved in a liquid. 5. A vacuum tank (1), a suction pump having a suction side connected to the vacuum tank (1), and a suction pump (6) for sucking a liquid from the vacuum tank (1) to reduce the pressure, and a suction pump. (6)
Vacuum tank that sucks liquid and is in a decompressed state
(1) is provided with a throttle nozzle (7) for supplying the liquid while maintaining the vacuum tank (1) in a reduced pressure state, and the suction pump (6) sucks the liquid from the vacuum tank (1) and the vacuum tank (1) Is supplied to the vacuum tank (1) from the squeezing nozzle (7) under reduced pressure, the liquid is degassed in the vacuum tank (1) to separate the liquid and gas, and the liquid is discharged from the vacuum tank (1). An upper depressurizing section (1a) for reducing the horizontal cross-sectional area upward is provided above the vacuum tank (1). The height is higher than 1/4 of the height of the entire vacuum tank, and a throttle nozzle (7) for spraying liquid downward is provided near the upper end of the upper throttle (1a). A degassing device that removes gas components dissolved in a liquid. 6. The degassing device for removing gas components dissolved in a liquid according to claim 1, wherein the throttle nozzle (7) jets the liquid at an angle of 30 to 120 degrees. 7. The upper throttle portion (1a) is tapered.
A degassing device for removing gaseous components dissolved in a liquid described in (1). 8. The deaerator for removing gas components dissolved in a liquid according to claim 7, wherein the tapered upper constriction (1a) has an inclination angle of 15 to 60 degrees with respect to a vertical plane. 9. The deaerator for removing gas components dissolved in a liquid according to claim 8, wherein the inclination angle of the tapered upper constricted portion (1a) with respect to the vertical plane is 20 to 40 degrees. 10. A gas component dissolved in a liquid according to claim 5, wherein the height of the upper throttle portion (1a) is １ ／ to の of the height of the entire vacuum tank. Degassing device. 11. A structure in which a plurality of vacuum tanks (1) are provided, a liquid is supplied by alternately switching the vacuum tanks (1), and the liquid is continuously degassed in the plurality of vacuum tanks (1). 6. A degassing device for removing gaseous components dissolved in a liquid according to claim 1 or 5. 12. A suction pump (6) for pumping a liquid in a vacuum tank (1).
After lowering the liquid level in the vacuum tank (1) from the upper end to the set position where the liquid level drops from the upper end to a reduced pressure state, the liquid is sprayed from the squeezing nozzle (7) into the reduced pressure air in the vacuum tank (1) The liquid sprayed from the squeezing nozzle (7) is dropped into the depressurized air in the vacuum tank (1) to separate the contained gas, and the liquid that has dropped into the lower part of the vacuum tank (1) is sucked. A degassing method for removing gaseous components dissolved in a liquid that discharges a liquid from which gas has been separated by suction with a pump (6). 13. A suction pump (6) for pumping a liquid in a vacuum tank (1).
With the liquid level in the vacuum tank (1) lowered from the upper end of the vacuum tank (1), the inside of the vacuum tank (1) is depressurized, and the squeeze nozzle is drawn into the depressurized air of the depressurized vacuum tank (1).
The liquid sprayed from (7) is supplied, and the liquid sprayed from the throttle nozzle (7) is dropped into the decompressed air in the vacuum tank (1) to separate the contained gas, and the vacuum tank (1) This is a degassing method in which the liquid that has fallen to the lower part is sucked by the suction pump (6) and the liquid separated from the gas is discharged.The upper throttle part (1a) that reduces the horizontal cross-sectional area upward In the vacuum tank (1)
The liquid is sprayed from the upper part of (1a) by the throttle nozzle (7) and supplied, and the supplied liquid is discharged from the vicinity of the bottom of the vacuum tank (1) by the suction pump (6), and the liquid from which the gas is separated. A degassing method for removing gas components dissolved in a liquid that discharges gas.