JP2015217370A - Method and apparatus for producing deaerated liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for easily and efficiently producing deaerated liquid, and an apparatus for producing deaerated liquid.SOLUTION: The method for producing deaerated liquid includes: a first step of supplying a misty liquid into a pressure-reduced container; a second step of stopping supply of the liquid while the pressure-reduced state inside the container is kept. The apparatus for producing deaerated liquid includes: mist generation means 2; a container 3 into which a misty liquid 21 generated by the mist generation means 2 is supplied; pressure reduction means 4 for reducing pressure in the container 3; and pressurizing means for varying a supply pressure for the liquid supplied to the mist generation means 2.

Description

  The present invention relates to a method for producing a degassed liquid and an apparatus for producing a degassed liquid which are suitable for supplying an electrolytic solution to a battery container, supplying a medical chemical solution to a container, and the like.

  Conventionally, in various technical fields, deaeration devices and bubble removal devices for degassing and defoaming liquids have been developed. This is because the gas dissolved in the liquid causes the liquid to oxidize and the bacteria to grow, causing troubles in the equipment and a decrease in product quality.

  For example, in Patent Document 1, the pressure is reduced in a state where the liquid is stored in the temporary storage unit, the air in the container is exhausted and the liquid is degassed at the same time, and the container, the connection unit, and the storage unit are rotated by 90 °. A method is described in which liquid flows into the container by gravity and the remaining liquid is injected by releasing atmospheric pressure.

  In Patent Document 2, the sealed space of the liquid injection chamber containing the battery case containing the electrode plate group is decompressed, and the inside of the battery case and the inside of the secondary liquid storage chamber having the opening are simultaneously evacuated. In addition, a method is described in which the piston is operated to reduce the internal volume of the secondary liquid storage chamber and the electrolyte in the secondary liquid storage chamber is injected into the battery case while being directly pressurized by the piston.

  In Patent Document 3, bubbles in the stored liquid are removed by reducing the pressure in the storage tank, and bubbles in the impregnated material in the container are removed by reducing the pressure in the container. A method is described in which a liquid is caused to flow from the storage tank into the container by lowering the pressure of the tank below the pressure in the storage tank.

JP 2005-259444 A Japanese Patent Laid-Open No. 2004-247120 Japanese Patent Laid-Open No. 11-73942

However, in the conventional degassing method, the dissolved gas in the liquid cannot be sufficiently removed, and bubbles remain in the liquid, which may cause problems in manufacturing and quality. . Further, when the pressure in the storage tank and the container is reduced with different vacuum systems, two vacuum systems are required, and the size of the apparatus cannot be avoided.
This invention is made | formed in view of the said situation, The objective is to provide the method which manufactures the deaerated liquid easily and efficiently, and the apparatus which manufactures the deaerated liquid.

  The method for producing a degassed liquid according to the present invention, which has achieved the above object, includes a first step of supplying a mist-like liquid into a depressurized container, and maintaining the depressurized state in the container. And a second step of stopping the supply of the liquid. The method for producing a degassed liquid according to the present invention supplies the liquid in the form of a mist in a decompressed container, so that the dissolved gas in the liquid can be efficiently reduced. In addition, if the supply of liquid is stopped while maintaining the reduced pressure state in the container, the dissolved gas in the liquid expands, but collects and binds to the upper part of the container. It becomes easy to be discharged. Furthermore, since the liquid can be supplied and degassed simultaneously, a predetermined amount of degassed liquid can be produced efficiently, which is advantageous from the viewpoint of cost.

  The method for producing a degassed liquid according to the present invention preferably includes a third step in which the liquid is supplied into the container after the second step of stopping the supply of the liquid. Thereby, the gas which remains in the liquid supplied in the container can be reduced efficiently.

  In the method for producing a degassed liquid according to the present invention, it is preferable that the third step is started when a predetermined time (hereinafter referred to as “first predetermined time”) elapses after the supply of the liquid is stopped. Since the supply of the liquid into the container can be automatically controlled when the first predetermined time has elapsed, it is possible to efficiently produce the degassed liquid.

  In the method for producing a degassed liquid according to the present invention, it is preferable that in the second step, the supply of the liquid is stopped when it is detected that the liquid has reached a predetermined level. Thereby, since the supply stop of the liquid into the container can be automatically controlled, it is possible to efficiently produce a predetermined amount of degassed liquid.

  In the method for producing a degassed liquid according to the present invention, in the second step, when the predetermined time (hereinafter referred to as “second predetermined time”) elapses from the start of supply of the liquid, the liquid is predetermined. It is preferable to stop the supply of the liquid when the level is reached. If the supply flow rate of liquid to the container is set in advance, the amount of liquid supplied into the container can be easily obtained when the second predetermined time has elapsed. Thereby, when the second predetermined time has elapsed, the supply stop of the liquid into the container can be automatically controlled, so that a predetermined amount of degassed liquid can be efficiently manufactured.

  The container of the present invention preferably contains a liquid produced by the production method. If the said manufacturing method is used, since supply and deaeration of the liquid to a container will be performed simultaneously, it is possible to manufacture the deaerated liquid efficiently and it is advantageous from a viewpoint of cost.

  The apparatus for producing degassed liquid according to the present invention, which has achieved the above object, comprises a mist generating means, a container to which a mist-like liquid generated by the mist generating means is supplied, and a pressure reducing pressure in the container. Means, and pressurizing means for making the supply pressure of the liquid supplied to the fog generating means variable. Since the mist-like liquid has a large total surface area of droplets, the dissolved gas in the liquid can be easily reduced if the mist-like liquid is supplied into a decompressed container. Further, since the supply pressure of the liquid supplied to the mist generating means is variable by the pressurizing means, it is possible to adjust the amount of liquid to be atomized and to start and stop the supply of liquid to the mist generating means.

  In the degassed liquid production apparatus of the present invention, it is preferable that the pressurizing means has a pressurizing pump, and the output of the pressurizing pump is adjustable. Since the supply pressure of the liquid supplied to the mist generating means can be changed by adjusting the output of the pressurizing pump, adjustment of the amount of liquid to be atomized and operation for starting and stopping the supply of liquid to the mist generating means It can be performed.

  In the apparatus for producing degassed liquid according to the present invention, it is preferable that the pressurizing unit has a valve, and the supply pressure of the liquid supplied to the fog generating unit can be changed by the valve. . By adjusting the opening of the valve, it is possible to change the supply pressure of the liquid supplied to the mist generating means, so the adjustment of the amount of liquid to be atomized and the start and stop of the supply of liquid to the mist generating means The operation can be performed.

  In the degassed liquid production apparatus of the present invention, the container has the liquid supply port, the supply port is the mist generating means, and the supply port is a space in the container. It is preferable that it is located in the center part in the up-down direction or above the center part. Thereby, since it falls in the direction of gravity after a mist-like liquid is supplied, and the time until it reaches | attains the liquid collected in the container can be lengthened, the dissolved gas in a liquid becomes easy to be reduced.

  In the degassed liquid production apparatus of the present invention, it is preferable that an inner diameter of the supply port is 1 mm or more and 10 mm or less. If the supply port has such a size, the liquid tends to become mist-like and the total surface area of the droplets increases, so that the dissolved gas in the liquid is easily reduced.

  In the apparatus for producing degassed liquid according to the present invention, it is preferable that the container has a suction port connected to the decompression unit, and the suction port is located at the highest part of the container. . Since the liquid in the container descends in the direction of gravity, only the gas can be efficiently drawn into the decompression means when the inside of the container is decompressed, and the dissolved gas in the liquid is easily reduced.

The method for producing a degassed liquid according to the present invention includes a first step of supplying a mist-like liquid into a decompressed container, and the supply of the liquid is stopped while maintaining the decompressed state in the container. And a second step. The method for producing a degassed liquid according to the present invention supplies the liquid in the form of a mist in a decompressed container, so that the dissolved gas in the liquid can be efficiently reduced. In addition, if the supply of liquid is stopped while maintaining the reduced pressure state in the container, the dissolved gas in the liquid expands, but collects and binds to the upper part of the container. It becomes easy to be discharged. Furthermore, since the liquid can be supplied and degassed simultaneously, a predetermined amount of degassed liquid can be produced efficiently, which is advantageous from the viewpoint of cost.
The container of the present invention is filled with the liquid produced by the above method. If the said manufacturing method is used, since supply and deaeration of the liquid to a container will be performed simultaneously, it is possible to manufacture the deaerated liquid efficiently and it is advantageous from a viewpoint of cost.
The apparatus for producing degassed liquid according to the present invention includes a mist generating means, a container to which a mist-like liquid generated by the mist generating means is supplied, a decompressing means for decompressing the inside of the container, and the mist generating means. Pressurizing means for making the supply pressure of the liquid supplied to the liquid variable. If a mist-like liquid having a large total surface area of droplets is supplied into a decompressed container, dissolved gas in the liquid can be easily reduced. Further, since the supply pressure of the liquid supplied to the mist generating means is variable by the pressurizing means, it is possible to adjust the amount of liquid to be atomized and to start and stop the supply of liquid to the mist generating means.

FIG. 1 is a diagram showing a configuration of a degassed liquid production apparatus according to the present invention. FIG. 2 is a flowchart of each step of the method for producing a degassed liquid according to the present invention. FIG. 3 is a view showing a state of the production apparatus in the process of depressurizing the inside of the container of the degassed liquid production method of the present invention. FIG. 4 is a diagram showing a state of the manufacturing apparatus in the step of supplying a mist-like liquid in the method for manufacturing a degassed liquid according to the present invention. FIG. 5 is a diagram showing a state of the production apparatus in the process of stopping the supply of the mist-like liquid in the method for producing the degassed liquid of the present invention. FIG. 6 is a diagram showing a state of the manufacturing apparatus in the process of decompressing the inside of the container after stopping the supply of the mist-like liquid in the method for manufacturing the degassed liquid of the present invention. FIG. 7 is a diagram showing a state of the production apparatus in the step of supplying a liquid in the method for producing a degassed liquid according to the present invention. FIG. 8 is a diagram showing a state of the manufacturing apparatus in the step of stopping the supply of the liquid in the method for manufacturing the degassed liquid according to the present invention.

The method for producing a degassed liquid according to the present invention includes a first step of supplying a mist-like liquid into a decompressed container, and the supply of the liquid is stopped while maintaining the decompressed state in the container. And a second step. The method for producing a degassed liquid according to the present invention supplies the liquid in the form of a mist in a decompressed container, so that the dissolved gas in the liquid can be efficiently reduced. In addition, if the supply of liquid is stopped while maintaining the reduced pressure state in the container, the dissolved gas in the liquid expands, but collects and binds to the upper part of the container. It becomes easy to be discharged. Furthermore, since the liquid can be supplied and degassed simultaneously, a predetermined amount of degassed liquid can be produced efficiently, which is advantageous from the viewpoint of cost.
The container of the present invention is filled with the liquid produced by the above method. If the said manufacturing method is used, since supply and deaeration of the liquid to a container will be performed simultaneously, it is possible to manufacture the deaerated liquid efficiently and it is advantageous from a viewpoint of cost.
The apparatus for producing degassed liquid according to the present invention includes a mist generating means, a container to which a mist-like liquid generated by the mist generating means is supplied, a decompressing means for decompressing the inside of the container, and the mist generating means. Pressurizing means for making the supply pressure of the liquid supplied to the liquid variable. If a mist-like liquid having a large total surface area of droplets is supplied into a decompressed container, dissolved gas in the liquid is easily reduced. Further, since the supply pressure of the liquid supplied to the mist generating means is variable by the pressurizing means, it is possible to adjust the amount of liquid to be atomized and to start and stop the supply of liquid to the mist generating means.

1. Degassed liquid manufacturing apparatus In the degassed liquid manufacturing apparatus of the present invention, the fog generating means is for generating a mist-like liquid. The mist is obtained by atomizing a liquid into fine droplets and flying them into the air, and includes what is called fog or mist, for example, droplets having a diameter of several μm to several mm. When the liquid is atomized to form a mist, the volume of each droplet is reduced, so that the total surface area is increased even if the liquid amount is not changed. Therefore, if it is a mist-like liquid, it is easy to reduce the dissolved gas in a liquid.

As main mechanisms for generating fog, there are one-fluid jet, two-fluid jet, ultrasonic vibration, static electricity, and centrifugal force. One fluid jet is a method of atomizing a liquid by passing a pressurized liquid through a hole. The two-fluid jet is a method of atomizing a liquid by bringing a gas such as compressed air, vapor, or inert gas into contact with a liquid and passing it through a hole. The ultrasonic vibration is a method in which a water surface rises and mist is generated by vibrating an ultrasonic vibrator in contact with a liquid. In the method using static electricity, mist is generated by using the Coulomb force between charged droplets by applying a voltage to the liquid. In the method using centrifugal force, the rotor supplied with the liquid is rotated by centrifugal force to generate mist. Is generated.
Here, the mist generating means in the case of the one-fluid jet and the two-fluid jet has a hole through which liquid, liquid and gas pass.

  The mist generation method is preferably one-fluid jet or two-fluid jet. In the case of single fluid injection, gas such as compressed air is not used, which is particularly effective when it is desired to reduce dissolved gas in the liquid. Further, in the case of the two-fluid ejection, the particle diameter of the droplet can be made smaller than in the case of the one-fluid ejection, so that the total surface area of the droplet can be increased.

  It is preferable that a storage means is connected to the fog generating means. The storage means stores liquid to be supplied to the mist generation means. Although the capacity | capacitance of a storage means is not specifically limited, It is preferable that it is larger than the capacity | capacitance of a container. Thereby, the amount of liquid supplied from the storage means into the container can be secured.

  It is also preferable that the degassed liquid is stored in the storage means. For example, the mist generation means and the decompression means are connected to the storage means in the same manner as the container to be described later, and the mist generation means and the pressurization means are mist-like in the storage means in a state where the pressure in the storage means is reduced. When the liquid is supplied, the degassed liquid can be supplied into the storage means. If it does so, the liquid deaerated by the storage means will be supplied as a mist-like liquid in the container currently pressure-reduced, and will further be deaerated in the container. If the manufacturing apparatus is configured in this manner, deaeration can be performed by both the storage means and the container, and thus the same effect as that obtained by performing multi-stage deaeration can be obtained. Thereby, the reduction effect of dissolved gas can be further enhanced.

  The apparatus for producing degassed liquid according to the present invention has a pressurizing means for changing the supply pressure of the liquid supplied to the mist generating means. The liquid pressurized by the pressurizing means can be supplied to the mist generating means, and the amount of liquid to be atomized can be adjusted, and the supply of liquid to the mist generating means can be started and stopped. In addition, if the mist is generated by one-fluid jet that pressurizes the liquid by the pressurizing means, the dissolved gas in the liquid is less likely to increase than in the case of the two-fluid jet that mixes the gas and the liquid to generate the mist. Therefore, this is particularly effective when the dissolved gas in the liquid is desired to be reduced. Further, the amount of liquid to be atomized can be easily changed by changing the pressure of the liquid.

  The pressurizing method in the pressurizing means is not particularly limited, but preferably includes a pressurizing pump, and the output of the pressurizing pump is adjustable. Since the supply pressure of the liquid supplied to the mist generating means can be changed by adjusting the output of the pressurizing pump, adjustment of the amount of liquid to be atomized and operation for starting and stopping the supply of liquid to the mist generating means It can be performed. The type of the pressurizing pump is not particularly limited as long as it has the performance required to pressurize the liquid, and for example, a vortex pump, a cascade pump, a gear pump, a diaphragm pump, and a piston pump can be used.

  Further, the pressurizing means has a valve (hereinafter referred to as “first valve”), for example, a valve, and the supply pressure of the liquid supplied to the mist generating means can be changed by the first valve. Is also preferable. By adjusting the opening of the first valve, it is possible to change the supply pressure of the liquid supplied to the mist generating means, so the adjustment of the amount of liquid to be atomized and the start of supply of liquid to the mist generating means And stop operation can be performed.

  Although the kind of 1st valve used for the change of the supply pressure of a liquid is not specifically limited, For example, a globe valve, a needle valve, a butterfly valve, etc. can be used.

  The pressure of the liquid is not particularly limited, but is preferably 200 kPa or more and 1 MPa or less, more preferably 300 kPa or more and 800 kPa or less, and further preferably 350 kPa or more and 600 kPa or less. If the pressurized pressure of the liquid is in the above range, a mist-like liquid having a particle size suitable for degassing can be obtained when the pressurized liquid is supplied to the mist generating means. Moreover, since a general pressurization pump like a commercially available thing can be used, it is advantageous also from a viewpoint of cost.

  In the container, a mist-like liquid is supplied to the inside by the mist generating means. It is preferable that the container has a certain degree of rigidity so that the container does not deform even when the inside of the container is in a reduced pressure atmosphere. Further, the shape of the container is not particularly limited, but for example, the height is preferably 1.2 times or more with respect to the maximum width, more preferably 1.5 times or more, and 2.0 times or more. More preferably. Thereby, since it falls in the direction of gravity after a mist-like liquid is supplied, and the time until it reaches the liquid collected in the container can be lengthened, it becomes easy to reduce dissolved gas in the liquid.

  The container is provided with a supply port for supplying a mist-like liquid. The position of the supply port in the container is not particularly limited, but it is preferable that the supply port is located at the center in the vertical direction of the space in the container or above the center. The central portion is, for example, a portion located at the center when the space in the container is divided into three equal parts in the vertical direction. Thereby, since it falls in the direction of gravity after a mist-like liquid is supplied, and the time until it reaches the liquid collected in the container can be lengthened, it becomes easy to reduce dissolved gas in the liquid.

  When the mist generation method is a one-fluid injection or two-fluid injection, the mist generation means may be a container supply port or a spray nozzle attached to the container supply port. If the supply port itself is fog generating means, the number of parts is not increased, which is advantageous from the viewpoint of maintenance.

  When the mist generating means is a container supply port, the size of the supply port is not particularly limited, but the inner diameter is preferably 1 mm or more and 10 mm or less, more preferably 3 mm or more and 8 mm or less, and 4 mm or more and 7 mm or less. More preferably. If the supply port has such a size, the liquid tends to become mist-like and the total surface area of the droplets increases, so that the dissolved gas in the liquid can be easily reduced.

  In the case of a spray nozzle in which the mist generating means is attached to the supply port of the container, the size of the droplet, the spray angle, the cross-sectional shape of the spray, etc. can be changed depending on the type of the spray nozzle. Here, the spray nozzle refers to a tubular nozzle having holes for allowing liquid to pass therethrough.

  The container is provided with a suction port connected to the decompression means. When the amount of the mist-like liquid supplied to the container exceeds the capacity of the container, the liquid moves from the suction port to the decompression means side through the flow path. The position of the suction port is not particularly limited, but it is preferably located at the highest part in the container. By reducing the pressure of the container, the liquid in the container can be prevented from moving to the pressure reducing means side.

  The decompression means is for decompressing the inside of the container to which the mist-like liquid is supplied to reduce dissolved gas in the liquid. Here, the reduced pressure means a pressure lower than the atmospheric pressure (101.25 hPa). The pressure in the container is preferably 0.5 kPa or more and 50 kPa or less, more preferably 0.5 kPa or more and 15 kPa or less, and further preferably 0.5 kPa or more and 8 kPa or less. Thereby, pressure reduction required for deaeration can be performed, preventing a deformation | transformation in a container.

  The decompression method in the decompression means is not particularly limited, but it is preferable to decompress the interior of the container using a vacuum pump. Although the kind of vacuum pump is not specifically limited, It is preferable to use a dry pump or a diaphragm vacuum pump. In any case, since no oil is used in the vacuum chamber, it is possible to prevent foreign matters such as oil from entering the liquid. The dry pump and the diaphragm vacuum pump can be operated from atmospheric pressure, and can be depressurized generally in the range of 0.1 kPa to 10 kPa.

  It is preferable that the flow path connecting the container and the decompression unit or the container and the pressurization unit has a certain degree of rigidity so as not to be deformed even when the interior of the container is in a decompressed atmosphere.

  It is preferable that a pressure sensor (hereinafter referred to as “first pressure sensor”) is provided in at least one location of the flow path connecting the suction port of the container and the decompression means. Thereby, the pressure in the container decompressed by decompression means such as a vacuum pump can be measured. Although the kind of pressure sensor is not specifically limited, For example, pressure sensors, such as a diffusion resistance type, a resistance wire type, an electrostatic capacitance type, and a mechanical type, can be used.

  It is preferable that a pressure sensor (hereinafter referred to as “second pressure sensor”) is provided in at least one location of the flow path connecting the supply port of the container and the pressurizing means. Thereby, the pressure of the liquid pressurized by the pressurizing means can be measured. Although the kind of pressure sensor is not specifically limited, For example, a pressure sensor such as a diffusion resistance type, a resistance wire type, a capacitance type, or a mechanical type can be used in the same manner as the first pressure sensor.

  It is preferable that a valve (hereinafter referred to as “second valve”) is provided in at least one location of the flow path connecting the suction port of the container and the decompression means. If the second valve is opened while the decompression means such as a vacuum pump is activated, the inside of the container is decompressed, and if the second valve is closed, decompression in the container is stopped.

  The second valve is preferably a check valve. If the second valve is a check valve, the liquid can be prevented from flowing back from the decompression means to the container side.

  It is preferable that a valve (hereinafter referred to as “third valve”) is provided in at least one place of the flow path connecting the supply port of the container and the pressurizing means. When the third valve is opened with the pressurizing means such as a pressure pump activated, the liquid is supplied into the container, and when the third valve is closed, the supply of the liquid into the container is stopped.

  The third valve is preferably a check valve like the second valve. If the third valve is a check valve, the liquid can be prevented from flowing back from the supply port of the container to the pressurizing means side.

  The supply stop of the liquid in the second step to be described later can be executed due to various triggers. For example, it is possible to detect the level of the liquid by providing a detection means for detecting the presence of the liquid in the container or the flow path communicating with the container, and stop the supply of the liquid by a signal from the detection means. it can. For example, the detection means is provided in a flow path connecting the suction port of the container and the decompression means, and can detect that the liquid supplied to the container has reached a predetermined level. Since the inside of the container is decompressed by the decompression means, when the liquid is supplied beyond the capacity of the container, the liquid moves to the decompression means side through the flow path. Here, if a detection means is provided in the flow path connecting the container and the decompression means, it can be confirmed whether or not the liquid supplied to the container has reached a predetermined level. If the detection signal of this detection means is input to the control means, which will be described later, it can be used for controlling the manufacturing apparatus such as starting and stopping of the pressurization means. The type of the detection means is not particularly limited, and commercially available ones such as an optical sensor and an electric resistance sensor can be used, but in order to prevent foreign matter from entering the liquid in the container, a non-contact detection means It is preferable to use an optical sensor.

  The control means incorporates a storage device, an arithmetic processing device, a timer, etc., and is connected to each device such as a pressurizing means and a valve through a transmission path. An operation signal of each device is input to the control means, and arithmetic processing and the like are performed based on these input signals and data stored in advance in the storage device. Then, a control signal is output from the control means to each device. For example, when a predetermined liquid amount is reached, control such as closing the valve is performed. Further, the timer of the control means can measure the time required for each process, for example, from the start to the stop of the pressurizing means. It is possible to control the timing at which a control signal is output to each device using the time measured by the timer.

2. Method for Producing Degassed Liquid The method for producing a degassed liquid according to the present invention includes a first step of supplying a mist-like liquid into a depressurized container, and maintaining the depressurized state in the container And a second step of stopping the supply of the liquid.

(1) 1st process First, in order to decompress the inside of a container, the decompression means connected to the suction port of the container via the flow path is started. After starting the decompression means, the second valve is opened to decompress the inside of the container. Next, a pressurizing unit that is connected to the supply port of the container and makes the supply pressure of the liquid supplied to the mist-like liquid variable is activated. The pressurizing means has a pressurizing pump, and the output of the pressurizing pump is preferably adjustable. Moreover, it is also preferable that the pressurizing means has a first valve, and the supply pressure of the liquid supplied to the mist generating means can be changed by the first valve. When the inside of the container is depressurized to a predetermined pressure, the third valve is opened. The pressurized liquid passes through the supply port of the container that is the mist generating means, and the mist liquid is supplied into the container. Since the inside of the container is decompressed, the gas dissolved in the mist-like liquid having a small volume and a large total surface area is quickly expelled. As a result, a degassed liquid is obtained. The liquid supply is continued until the amount of the mist-like liquid supplied to the container exceeds the capacity of the container. When the first pressure sensor detects that the inside of the container has been depressurized to a predetermined pressure, the mist liquid may be supplied into the container, or the time until the inside of the container reaches the predetermined pressure. It is also possible to grasp in advance and supply a mist-like liquid into the container when the time has elapsed.

(2) Second Step After the first step, the second valve is opened, the third valve is closed while maintaining the decompressed state in the container, the pressurizing means is stopped, and the mist-like liquid Stop supplying.
Here, it is preferable to stop the supply of the mist-like liquid while operating the decompression means. As a result, the bubbles remaining in the liquid in the container are collected by the upper part of the container and bonded while expanding due to the reduced pressure, so that a liquid with reduced bubbles can be obtained in the container.
Further, the supply of the mist-like liquid may be stopped when the detection means or the like detects that the liquid has reached a predetermined level, and when the second predetermined time elapses from the start of the supply of the mist-like liquid, If the liquid reaches a predetermined level, it may be stopped. In addition, when the supply is stopped when the second predetermined time has elapsed from the start of the supply of the mist-like liquid, it is necessary to grasp in advance the amount of the mist-like liquid supplied within the second predetermined time.

(3) 3rd process It is preferable that a liquid is supplied in a container in a 3rd process after the 2nd process which stops supply of a mist-like liquid. As a result, the bubbles remaining in the liquid in the container are collected by the upper part in the container while being expanded by the reduced pressure. The bubbles combined at the upper part of the container are further pushed out by the supplied liquid and discharged from the suction port of the container to the flow path outside the container. If it does so, compared with the deaerated liquid obtained at the 1st process, the liquid with which the bubble was reduced can be obtained in a container.
Moreover, it is also preferable that the third step is started when the first predetermined time has elapsed since the liquid supply was stopped. Thereby, since supply start of the liquid into a container can be controlled automatically after the 1st predetermined time passes, it is possible to manufacture the deaerated liquid efficiently.
The liquid supplied in the third step may be the same type of liquid as the mist-like liquid supplied in the first step, or may be a different type of liquid from the mist-like liquid. Thereby, mixing of liquid and deaeration can be performed simultaneously. Moreover, it is preferable that the liquid supplied at a 3rd process is a mist form. Since the mist-like liquid has a large total surface area of the liquid droplets, the dissolved gas in the liquid is easily reduced by supplying the liquid into a decompressed container. As a result, a degassed liquid with reduced bubbles can be obtained in the container.

  Further, when a predetermined time (hereinafter referred to as “third predetermined time”) has elapsed, the second valve and the third valve are closed, and the decompression means and the pressurization means are stopped. Manufacturing is complete.

3. Embodiments The present invention will be described in more detail based on the following embodiments. However, the present invention is not limited by the following embodiments as a matter of course, and is suitable within a range that can meet the purpose described above and below. Of course, it is possible to carry out the invention with modifications, and these are all included in the technical scope of the present invention. In addition, in each drawing, although hatching, a member code | symbol, etc. may be abbreviate | omitted for convenience, in this case, a description and another drawing shall be referred. In addition, the dimensions of the various members in the drawings are given priority to contribute to the understanding of the features of the present invention, and may be different from the actual dimensions.

FIG. 1 is a diagram showing a configuration of a degassed liquid production apparatus 1 according to the present invention. The suction port 10 of the container 3 and the decompression means 4 are connected via a flow path 13a. A pressurizing means 5 having a pressurizing pump is connected to the supply port 9 of the container 3 through a flow path 13b. The pressurizing means 5 is connected to a storage means 7 for storing a liquid. In FIG. 1, the supply port 9 is the fog generating means 2.
The flow path 13a connecting the suction port 10 of the container 3 and the decompression means 4 includes a first pressure sensor 11a for pressure measurement and a second for operating the decompression start and stop in the container 3 by the decompression means 4. The valve 12a and the detection means 6 for detecting that the mist-like liquid has reached a predetermined level are provided in the container 3.
In the flow path 13b connecting the supply port 9 of the container 3 and the pressurizing means 5, the second pressure sensor 11b for pressure measurement and the supply start and stop of the mist-like liquid 21 by the pressurizing means 5 are operated. For this purpose, a third valve 12b is provided. The control means 8 is connected to the pressurization means 5, the detection means 6, the second valve 12a, and the third valve 12b via the transmission path 14. Although not shown, the control means 8 may be connected to the mist generation means 2, the decompression means 4, the storage means 7, the first pressure sensor 11a, and the second pressure sensor 11b.

  FIG. 2 is a flowchart of each step of the method for producing a degassed liquid according to the present invention. 3-8 is a figure which shows the state of the manufacturing apparatus in each process of the manufacturing method of the deaerated liquid of this invention. Hereinafter, the details of each step of the method for producing the degassed liquid will be described with reference to FIGS. 3-8, when the 2nd valve 12a and the 3rd valve 12b are shaded, it has shown that the valve is open, and when not shaded, the valve is closed. It is shown that. Further, when the decompression means 4 and the pressurization means 5 are shaded, it indicates that each means is activated, and when not shaded, it indicates that each means is stopped. .

(1) First Step In the first step, pressure reduction in the container 3 and supply of the mist-like liquid 21 into the container 3 are performed. As shown in FIG. 3, in order to depressurize the inside of the container 3, the decompression means 4 connected to the suction port 10 of the container 3 through the flow path 13a is started. After starting the decompression means 4, the second valve 12a provided in the flow path 13a is opened. By this operation, the inside of the container 3 becomes a reduced pressure atmosphere. Here, the pressure in the container 3 is measured by the first pressure sensor 11a provided in the flow path 13a.

  Next, as shown in FIG. 4, when the pressurizing unit 5 having a pressurization pump is activated to supply the mist-like liquid 21 to the container 3, the liquid 20 stored in the storage unit 7 is pressurized. However, it is transferred to the supply port 9 side of the container 3. The pressure of the pressurized liquid is measured by the second pressure sensor 11b provided in the flow path 13b. When the liquid reaches a predetermined pressure, the third valve 12 b is opened to supply the liquid into the container 3 from the supply port 9 of the container 3. Then, the pressurized liquid is sprayed into the container 3 from the supply port 9. Since the inside of the container 3 is in a reduced pressure atmosphere, the gas dissolved in the mist-like liquid 21 having a small volume and a large total surface area is quickly expelled from the container 3. Thereby, the degassed liquid 22 is stored in the container 3.

(2) Second Step In the second step, the supply of the mist-like liquid 21 to the container 3 is stopped while maintaining the reduced pressure state in the container 3. As shown in FIG. 5, when the liquid amount of the mist-like liquid 21 supplied to the container 3 exceeds the capacity of the container 3, the third valve 12 b is closed and the mist-like liquid 21 to the container 3 is closed. Stop supplying. At this time, the second valve 12a is left open to maintain a reduced pressure atmosphere. The pressurizing means 5 may be kept activated or stopped. If the pressurizing means 5 is started, when the mist-like liquid 21 is supplied again in the subsequent steps, the stop time and start time of the pressurizing means 5 can be shortened.
Here, the supply of the mist-like liquid 21 is stopped when the detection means 6 provided in the flow path 13a connecting the container 3 and the decompression means 4 detects that the liquid has reached a predetermined level. Also good. Further, when the second predetermined time has elapsed from the start of the supply of the mist-like liquid 21, the supply of the mist-like liquid 21 may be stopped assuming that the liquid has reached a predetermined level. When the supply of the mist-like liquid 21 is stopped after the second predetermined time has elapsed, it is necessary to know in advance the amount of liquid supplied to the container 3 in the second predetermined time.

  As shown in FIG. 6, after the supply of the mist-like liquid 21 is stopped in the second step, the second valve 12a is opened and the inside of the container 3 is held in a reduced pressure atmosphere. As a result, the bubbles 23 remaining in the liquid in the container 3 are gathered and joined to the upper part in the container 3 while expanding due to the reduced pressure.

(3) Third Step After the second step of stopping the supply of the mist-like liquid 21, as shown in FIG. 7, in the third step, the liquid is further supplied into the container 3. Thereby, the bubbles 23 combined at the upper part in the container 3 are further pushed out by the supplied liquid and discharged from the suction port 10 of the container 3 to the flow path 13a outside the container. If it does so, compared with the deaerated liquid obtained by operation of a 1st process, the liquid in which the bubble 23 was reduced can be obtained in a container.
In the third step, it is preferable to supply the liquid into the container 3 after the first predetermined time has elapsed. Thereby, since the supply start of the liquid into the container 3 can be controlled automatically, it is possible to manufacture the degassed liquid 22 efficiently.

  The liquid supplied in the third step may be the same type of liquid as the mist-like liquid 21 supplied in the first step, or may be a different type of liquid from the mist-like liquid 21. Thereby, mixing of liquid and deaeration can be performed simultaneously. Moreover, it is preferable that the liquid supplied at a 3rd process is a mist form. Since the mist-like liquid has a large total surface area of the liquid droplets, the dissolved gas in the liquid is easily reduced by supplying the liquid into the container 3 whose pressure is reduced. Then, the degassed liquid 22 in which the bubbles 23 are reduced can be obtained in the container 3.

  As shown in FIG. 8, when the third predetermined time elapses, the second valve 12a and the third valve 12b are closed, and the depressurizing means 4 and the pressurizing means 5 are stopped, whereby the degassed liquid 22 is obtained. Is completed.

1: Production apparatus 2 of degassed liquid 2: Mist generating means 3: Container 4: Pressure reducing means 5: Pressure means 6: Detection means 7: Storage means 8: Control means 9: Supply port, 10: Suction port 11a: 1st pressure sensor, 11b: 2nd pressure sensor 12a: 2nd valve, 12b: 3rd valve 13a, 13b: Flow path 14: Transmission path 20: Stored liquid, 21: Foggy liquid, 22: Deaeration Liquid, 23: bubbles

Claims (12)

A first step of supplying a mist-like liquid into the decompressed container;
A method for producing a degassed liquid, comprising: a second step of stopping the supply of the liquid while maintaining a reduced pressure state in the container.   The method for producing a degassed liquid according to claim 1, further comprising a third step of supplying the liquid into the container after the second step of stopping the supply of the liquid.   3. The method for producing degassed liquid according to claim 2, wherein the third step is started when a predetermined time (hereinafter referred to as “first predetermined time”) elapses after the supply of the liquid is stopped.   The method for producing a degassed liquid according to any one of claims 1 to 3, wherein in the second step, the supply of the liquid is stopped when it is detected that the liquid has reached a predetermined level.   In the second step, when a predetermined time (hereinafter referred to as “second predetermined time”) has elapsed from the start of supply of the liquid, the supply of the liquid is stopped when the liquid reaches a predetermined level. The method for producing a degassed liquid according to any one of claims 1 to 4.   A container in which a liquid produced by the method according to claim 1 is enclosed.   The mist generating means, a container to which the mist-like liquid generated by the mist generating means is supplied, a pressure reducing means for reducing the pressure in the container, and a supply pressure of the liquid supplied to the mist generating means are variable. A degassed liquid production apparatus comprising: a pressurizing unit;   8. The apparatus for producing degassed liquid according to claim 7, wherein the pressurizing means has a pressurizing pump, and the output of the pressurizing pump is adjustable.   The apparatus for producing degassed liquid according to claim 7 or 8, wherein the pressurizing means has a valve, and the supply pressure of the liquid supplied to the fog generating means can be changed by the valve. . The container has a supply port for the liquid;
The supply port is the fog generating means;
The apparatus for producing degassed liquid according to any one of claims 7 to 9, wherein the supply port is located in a central part in the vertical direction of the space in the container or on an upper side of the central part.   The apparatus for producing degassed liquid according to claim 10, wherein an inner diameter of the supply port is 1 mm or more and 10 mm or less. The container has a suction port connected to the decompression means;
The apparatus for producing degassed liquid according to any one of claims 7 to 11, wherein the suction port is located at a highest part in the container.