JP2000189708A - Deaeration device for removing gaseous component dissolved in liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently produce deaerated liquid with a simple structure, to simplify the maintenance and to reduce the running cost. SOLUTION: The deaeration device sucks liquid from a vacuum tank 1 with a sucking pump 6, and makes the vacuum tank 1 into an evacuated state. While the vacuum tank 1 is kept in the evacuated state, the liquid is fed to the vacuum tank 1 through a throttle nozzle 7. The fed liquid is deaerated with the vacuum tank 1 in the evacuated state, and the liquid and the gas are separated. The liquid is fed to the vacuum tank 1 with a liquid feeder 8 and the gas collected in the vacuum tank 1 is discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deaerator 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. For example, degassed water
It is effectively used for food processing, boilers, red water control in buildings, etc. When used in food processing, for example, water for juices, drinks, soups, etc., preserving freshness by antioxidation is extremely effective. Therefore, there is an effect that the amount of food additives such as antioxidants and stabilizers used can be reduced or can be eliminated. In addition, there is an effect of not oxidizing an important amino acid as a umami component. Since the amino acids are oxidized and the umami is reduced, sodium glutamic acid, a pigment and the like are added to increase the umami and to give 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. Also,
Furthermore, it has been 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.

[0007]

The membrane type degassing apparatus shown in FIG. 1 has a feature that water passing through the hollow fiber membrane can be continuously degassed. 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 present invention has been developed to solve such a drawback of the conventional deaerator. It is an important object of the present invention to efficiently produce degassed liquids with a simple structure, significantly simplify maintenance, and reduce running costs. It is to provide a device.

[0010] Still another important object of the present invention is that
An object of the present invention is to provide a deaerator for removing gas components dissolved in a liquid capable of effectively degassing various liquids including an organic substance, a fine powder, or the like or a liquid having an extremely high temperature.

[0011]

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 sucks a liquid from the vacuum tank 1 to reduce the pressure.
And a throttle nozzle 7 for supplying the liquid while maintaining the vacuum tank 1 in a reduced pressure state in the vacuum tank 1 which is in a reduced pressure state by sucking the liquid by the suction pump 6.

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
The liquid is degassed in the vacuum tank 1 to separate the liquid and the gas. That is, the deaerator of the present invention maintains the depressurized state by discharging the liquid from the vacuum tank 1 with the suction pump 6 instead of depressurizing the vacuum tank 1 with the vacuum pump, and while maintaining the depressurized state. It is characterized in that the liquid is supplied from the throttle nozzle 7 and deaerated.

The degassing apparatus for removing gaseous components dissolved in a liquid according to the present invention has a plurality of vacuum tanks 1. The liquid is continuously degassed in the vacuum tank 1 by alternately switching the plurality of vacuum tanks 1.

According to the third aspect of the present invention, a degassing device for removing gaseous components dissolved in a liquid is provided by a throttle nozzle 7.
The liquid is supplied to the vacuum tank 1 in a spray state. The liquid supplied to the vacuum tank 1 in the spray state is more efficiently degassed.

Further, according to a fourth aspect of the present invention, in a degassing apparatus for removing gaseous components dissolved in a liquid, a liquid feeder 8 is connected to the vacuum tank 1 and the liquid is fed by the liquid feeder 8. The gas supplied to the vacuum tank 1 is discharged from the vacuum tank 1. The vacuum tank 1 to which the liquid supply device 8 supplies the liquid stops discharging the liquid by the suction pump 6.

According to a fifth aspect of the present invention, a vacuum pump 29 is connected to the vacuum tank 1 in the degassing apparatus for removing gaseous components dissolved in a liquid. The vacuum pump 29 discharges the gas stored in the vacuum tank 1 and continuously degass the liquid in the vacuum tank 1.

Further, in the degassing apparatus for removing gaseous components dissolved in liquid according to claim 6 of the present invention, a storage tank 9 for the degassed liquid is connected to the discharge side of the suction pump 6. I have. The liquid supply device 8 supplies the degassed liquid stored in the storage tank 9 to the vacuum tank 1 and exhausts the gas in the vacuum tank 1.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below exemplify a deaerator for embodying the technical idea of the present invention, and the present invention does not limit the deaerator to the following.

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 of the present invention is a liquid other than water, for example, a liquid containing organic matter such as juice and soup, a liquid containing fine powder, and the like.
Alternatively, it can be used to degas a viscous liquid such as oil. In particular, since the deaerator of the present invention does not use a hollow fiber membrane, a viscous liquid such as oil, an extremely high temperature liquid, or a liquid containing an organic substance can be effectively deaerated. 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 deaerator shown in FIG. 2 for removing gas components dissolved in a liquid has a vacuum tank 1 for supplying water and deaeration, and a suction side connected to the vacuum tank 1. Water is supplied to the suction pump 6 that sucks water from the vacuum tank 1 to be in a reduced pressure state and to the vacuum tank 1 that sucks water by the suction pump 6 and is in a reduced pressure state while maintaining the vacuum tank 1 in a reduced pressure state. A throttle 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 and the liquid supply device 8 are provided.

The apparatus shown in FIG. 2 is provided with two vacuum tanks 1 so that water can be continuously degassed by switching alternately. The two vacuum tanks 1 have water outlets 11 at their bottoms. The discharge port 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 becomes the same as the liquid level of the vacuum tank 1 and indicates the liquid level in the vacuum tank 1. Further, a liquid level sensor 14 for electrically detecting the liquid level is provided at the bottom of the vacuum tank 1. The liquid level sensor 14 is connected to the controller 10 and transmits an electric signal of the liquid level to the controller 10.

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 are provided. 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 sprays water sucked into the vacuum tank 1 in a mist state. The water sucked into the vacuum tank 1 in this state becomes small fine particles and can be deaerated more quickly.
However, it is not always necessary to use a spray nozzle as the throttle nozzle. This is because in a state in which a liquid such as water is stored in the vacuum tank, the gas contained in the liquid floats in a foam and is degassed.

The throttle nozzle 7 is connected to the storage tank 9 via a check 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 having a high head, particularly a pump having a large suction head, is used for the suction pump 6, the vacuum tank 1
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. Further, the flow rate sensor can control the operation of the suction pump to adjust the flow rate of the suction pump. For example, the flow sensor controls the suction pump to discharge the liquid at a constant flow rate. A device for controlling 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 exhausted by the suction pump 6 and decompressed, the gas 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 liquid supply device may be any mechanism that can supply water to the vacuum tank and exhaust the accumulated gas.

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 a check valve 22. The check valve 22 transfers water from the storage tank 9 toward the vacuum tank 1, but does not transfer water on the contrary. The storage tank 9
A pressurizing pump 27 is connected to supply the stored water to the outside. The pressurizing pump 27 sucks the degassed liquid from the storage tank 9 and sends it to the outside under pressure.

The controller 10 controls the discharge valve 12, the exhaust valve 20, the liquid supply valve 21, and the suction valve 23, and operates as follows to store the degassed liquid 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, a discharge valve 12, an exhaust valve 20, a liquid supply valve 21, a suction valve 23, and a check valve 2 connected to the first vacuum tank 1A.
2 is a first discharge valve 12A, a first exhaust valve 20A, a first supply valve 21A, a first suction valve 23A, a first check valve 22A,
The discharge valve 12, the exhaust valve 20, the supply valve 21, the suction valve 23, and the check valve 22 connected to the second vacuum tank 1 </ b> B are connected to the second discharge valve 12 </ b> B, the second exhaust valve 20 </ b> B, and the second supply valve. 21B, a second suction valve 23B, and a second check valve 22B.

(1) Step of Starting Operation First The main valve 25 is opened, and the discharge valve 12, the liquid supply valve 21, and the suction valve 2 are opened.
Close 3. In this state, the exhaust valve 20 and the start valve 26
Is opened, tap water flows through the route of the main valve 25 → the filter 24 → the start valve 26 → the storage tank 9 → 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 1
0 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 determined by a liquid level sensor 28 provided in the storage tank 9.
Is detected by

After 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 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 20B closed,
By operating the suction pump 6, as shown by the arrow in FIG. 3, the storage tank 9 → the first check valve 22A → the first throttle nozzle 7A →
1st vacuum tank 1A → 1st discharge valve 12A → suction pump 6
→ Circulate water through the storage tank 9. In order to circulate the water in this path, the valve through which the water passes is opened. Other valves that do not circulate water, that is, the second suction valve 23B, the second liquid supply valve 21B, and the second discharge valve 12B are closed. In this state, the water in the storage tank 9 is circulated to the first vacuum tank 1A, and depressurized and degassed in the first vacuum tank 1A. The gas degassed from the water accumulates in the first vacuum tank 1A. Water is circulated through the storage tank 9 and the first vacuum tank 1A for a predetermined time, degassed, and the liquid level is measured by the liquid level sensor 14.
The liquid level sensor 14 sends a signal to the controller 10. The controller 10 closes the first discharge valve 12A and stops the water circulation between the first vacuum tank 1A and the storage tank 9 based on a signal from the liquid level sensor 14.

(3) Step of exhausting gas remaining in the first vacuum tank and degassing in the second vacuum tank The first exhaust valve 12A is closed, and the first exhaust valve 20A and the first liquid supply valve 21A are opened. Then, the liquid supply pump which is 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 first exhaust port 15 is detected by the first liquid level sensor 19. Based on the signal of the first liquid level sensor 19, the controller 10 makes the first exhaust valve 20A and the first
The liquid supply valve 21A is closed. In this state, the first vacuum tank 1
The gas of A is completely exhausted.

During the above operation, the second exhaust valve 20B is closed, and the suction pump 6 is moved from the storage tank 9 to the second check valve 22B to the second throttle as shown by the arrow in FIG. Water is circulated through the path of the nozzle 7B → 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 drops to the position of the liquid level sensor 14, the liquid level sensor 1
4 sends a signal to the controller 10. The controller 10 closes the second discharge valve 12B and stops the water circulation between the second vacuum tank 1B and the storage tank 9 based on the signal of the liquid level sensor 14.

(4) Evacuation of gas accumulated in the second vacuum tank and degassing in the first vacuum tank The second exhaust valve 12B is closed, and the second exhaust valve 20B and the second liquid supply valve 21B are opened. Then, the liquid supply pump which is 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 degassed liquid is supplied to the second vacuum tank 1B, the liquid level rises, and the gas stored in the upper part is exhausted from the second exhaust valve 20B 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 causes the second exhaust valve 20B and the second
The liquid supply valve 21B is closed. In this state, the second vacuum tank 1
The B gas is completely exhausted.

During the above operation, the first exhaust valve 20A is closed, and the suction pump 6 is moved from the storage tank 9 to the first check valve 22A to the first throttle as shown by the arrow in FIG. Water is circulated through the path of the nozzle 7A → 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 Water is circulated through the storage tank 9 and the first vacuum tank 1A for a predetermined time, and when the liquid level falls to the level of the liquid level sensor 14, the first discharge valve 12A is closed.

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.

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. In the deaerator having this structure, the gas stored in the vacuum tank 1 can be continuously exhausted by the vacuum pump, so that a liquid supply device for discharging the gas stored in the vacuum tank 1 can be omitted. However, as shown in the figure,
The storage tank 9 and the liquid supply device 8 are provided, and at the beginning of the operation, the water in the storage tank 9 is supplied to the vacuum tank 1 by the liquid supply device 8 so that the vacuum tank 1 can be quickly filled with water.

As shown in FIG. 5, a device for exhausting the gas in the vacuum tank 1 by the vacuum pump 29 is a single vacuum tank 1.
As a result, the liquid can be continuously degassed. For this reason, it is possible to efficiently deaerate one vacuum tank 1. As shown in FIG. 6, a plurality of vacuum tanks 1 can be connected to alternately degas in the vacuum tanks 1. As shown in FIG. 6, a deaerator having a plurality of vacuum tanks 1 supplies water in one of the vacuum tanks 1 in a decompressed state to deaerate the water, and the other vacuum tank 1 pumps the accumulated gas by a vacuum pump. At 29, exhaust can occur.

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 signals from the liquid sensor 19 and the liquid level sensor 14. The controller 10 is a vacuum tank 1
When the liquid level is between the liquid level sensor 14 and the liquid sensor 19, the vacuum pump 29 is operated. Vacuum pump 29
Exhausts the gas in the vacuum tank 1 and the liquid is sucked into the position of the liquid sensor 19, the vacuum pump 29
Stop the operation of. Stop the operation of the vacuum pump 29,
When the liquid level in the vacuum tank 1 drops to the position of the liquid level sensor 14, the controller restarts the operation of the vacuum pump 29.

The deaerator shown in FIG. 5 operates as follows to deaerate. (1) Step of Starting Operation First The main valve 25 is opened, and the discharge valve 12, the liquid supply valve 21, and the suction valve 2 are opened.
Close 3. In this state, when the vacuum pump 29 is operated and the start valve 26 is opened, tap water is supplied from the main valve 25 → the filter 24 → the start valve 26 → the storage tank 9 → the vacuum tank 1
Flowed in. 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.

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 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) Step of Deaeration with Vacuum Tank The suction pump 6 is operated to forcibly suck out water from the vacuum tank 1 and circulate it to the storage tank 9. In this step, the water circulates through the storage tank 9 → check valve 22 → throttle nozzle 7 → vacuum tank 1 → discharge valve 12 → suction pump 6 → 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 exhausted by the vacuum pump 29. The vacuum pump 29 is operated when discharging gas. When the exhaust capacity of the vacuum pump 29 can completely exhaust the gas stored in the vacuum tank 1,
Is controlled by the liquid sensor 18, the liquid level sensor 14, and the controller 10, and is operated intermittently. When the exhaust capacity of the vacuum pump 29 cannot exhaust the gas accumulated in the vacuum tank 1, the liquid level of the vacuum tank 1 gradually decreases even when the vacuum pump 29 is operated.
When the liquid level in the vacuum tank 1 drops to the position of the liquid level sensor 14 while the vacuum pump 29 is operating, the liquid level sensor 14 sends a signal to the controller 10, and the controller 10 closes the discharge valve 12, The operation of the suction pump 6 is stopped, the water circulation between the vacuum tank 1 and the storage tank 9 is stopped, and the gas in the vacuum tank 1 is discharged by the vacuum pump 29. When the liquid level of the vacuum tank 1 rises and this is detected by the liquid level sensor 14, the suction pump 6 restarts suction of the liquid into the vacuum tank 1. Also in this state, the vacuum pump 29 stops when the liquid level of the vacuum tank 1 rises higher than the liquid sensor 19,
When the level is lower than the level sensor 14, the operation is started.

Further, as shown in FIG. 6, the deaerator connecting the two vacuum tanks, for example, when the liquid level of the first vacuum tank 1A is reduced, the suction pump 6 is switched to the first vacuum tank. Switch from tank 1A to second vacuum tank 1B. The first vacuum tank 1A in which the liquid is no longer sucked by the suction pump 6 operates the vacuum pump 29A until the liquid is completely exhausted. The second vacuum tank 1B discharges the liquid with the suction pump 6, and when the liquid level is lowered, the second vacuum tank 1B
Switch from vacuum tank to first vacuum tank. afterwards,
This step is repeated to degas the liquid.

In the above deaerator, one suction pump is switched to suck liquid from two vacuum tanks alternately. Although not shown, the degassing device of the present invention can also be configured such that suction pumps are separately connected to the respective vacuum tanks, and liquid is sucked from the vacuum tanks by a dedicated suction pump.

The liquid sensor and 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.

[0050]

The deaerator for removing gaseous components dissolved in a liquid according to the present invention has a simple structure and has a feature that a deaerated liquid can be efficiently produced. Another advantage is that maintenance can be significantly simplified and running costs can be reduced. That is, the deaerator of the present invention sucks liquid from a vacuum tank with a suction pump, holds the liquid in a reduced pressure state, supplies the liquid to the vacuum tank with a throttle nozzle, and removes gas contained in the liquid with the reduced pressure vacuum tank. This is because the gas is removed and degassed, and further, the liquid is supplied to the vacuum tank by a liquid feeder, and the gas stored in the vacuum tank is exhausted.

Further, the degassing apparatus of the present invention for removing gas components dissolved in a liquid does not use a hollow fiber membrane,
The hollow fiber membrane is clogged because the liquid is discharged by the suction pump to maintain the vacuum tank in a depressurized state, and the liquid is supplied and degassed by the throttle nozzle so that the vacuum tank is maintained in the depressurized state. Liquids such as juices and sasoups which cannot be degassed and extremely high temperature liquids which cannot be degassed because the plastic hollow fiber membrane is melted can be effectively degassed.

In the degassing apparatus for removing gaseous components dissolved in liquid according to the second aspect of the present invention, a plurality of vacuum tanks are switched to perform degassing, so that liquid can be continuously degassed.

Further, in the degassing apparatus for removing gaseous components dissolved in the liquid according to the third aspect of the present invention, the throttle nozzle sprays the liquid in the form of a mist to deaerate the liquid, thereby efficiently degassing the liquid. it can.

In the degassing apparatus for removing gaseous components dissolved in liquid according to the fourth aspect of the present invention, the liquid is supplied by the liquid supply device and the gas stored in the vacuum tank is exhausted, so that maintenance is troublesome. There is a feature that the gas in the vacuum tank can be exhausted without using such a vacuum pump. For this reason, this deaerator has the feature that maintenance can be extremely simplified.

The degassing device according to the fifth aspect of the present invention has a feature that the gas in the vacuum tank is exhausted from the vacuum pump, so that the liquid can be continuously degassed in the vacuum tank.

Further, the degassing apparatus for removing gaseous components dissolved in the liquid according to claim 6 of the present invention can circulate the degassed liquid through a vacuum tank and a storage tank to repeatedly degas. It has the advantage of being able to degas less of the gas contained in 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 partial sectional view showing a deaerator according to an embodiment of the present invention.

FIG. 3 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. 4 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. 5 is a partial sectional view showing a deaerator according to another embodiment of the present invention.

FIG. 6 is a partial 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 2 ... hollow fiber membrane 3 ... water chamber 4 ... decompression chamber 5 ... vacuum pump 6 ... 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 15: Exhaust port 16: Liquid 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: check valve 22A: first check valve 2
2B: second check 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

Claims (6)

[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 keeping the vacuum tank (1) in a reduced pressure state, and the suction pump (6) sucks the liquid from the vacuum tank (1) and the throttle nozzle (7) To the vacuum tank (1) from which the vacuum tank (1) is depressurized, the liquid is degassed in the vacuum tank (1) to separate the liquid and gas, and the gas stored in the vacuum tank (1) A degassing device configured to exhaust gas and remove a gas component dissolved in a liquid. 2. A system comprising a plurality of vacuum tanks (1), wherein the liquid is supplied by alternately switching the vacuum tanks (1), and the liquid is continuously degassed in the plurality of vacuum tanks (1). The degassing device for removing a gas component dissolved in a liquid according to claim 1. 3. A degassing device for removing gas components dissolved in a liquid according to claim 1, wherein the throttle nozzle (7) supplies the liquid to the vacuum tank (1) in a spray state. 4. A liquid supply device for supplying a liquid to a vacuum tank (1).
(8) The liquid supply device (8) supplies liquid to the vacuum tank (1) and discharges gas stored in the vacuum tank (1).
The deaerator described in the above. 5. The degassing device according to claim 1, wherein a vacuum pump (29) is connected to the vacuum tank (1), and the vacuum pump (29) discharges gas stored in the vacuum tank (1). . 6. A degassing liquid storage tank (9) is connected to the discharge side of the suction pump (6), and the degassed liquid stored in the storage tank (9) is supplied to a vacuum tank (1). The deaerated liquid is circulated to the vacuum tank (1), and the deaerated liquid stored in the storage tank (9) is supplied to the vacuum tank (1) by the liquid feeder (8).
2. The degassing device for removing gas components dissolved in a liquid according to claim 1, wherein the device is configured to exhaust the gas of (1).