Separation tool, separation device, and separation system

Abstract

Provided is a separation instrument that separates a gaseous material from a solution housed in a container, said separation instrument having: a first end; a second end; and a side surface that is positioned between the first end and the second end, wherein a plurality of gas introduction grooves that swirl gas and introduce the gas into the container are formed in the side surface between the first end and the second end, and a discharge hole that discharges the gas together with the gaseous material which has been separated from the solution is formed between the center part of the second end and the center part of the first end.

Description

[Technical Field]

[0001] The present disclosure relates to a separation tool, a separation device, and Separation System M Regarding. [Background technology]

[0002] Patent Document 1 discloses a stopper for closing the opening of a container containing a solution containing a volatile substance. The stopper has an exhaust through-hole, a gas inlet, a gas outlet, and a spiral groove formed on the side of the stopper that runs from the gas inlet to the gas outlet. With the stopper of Patent Document 1, external gas is introduced through the gas inlet into the space between the inner circumferential surface of the container and the groove, and then blown into the container through the gas outlet. As the gas rotates spirally along the inner circumferential surface of the container, the solution is stirred up, and the volatile substance contained in the solution is evaporated and separated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4763805 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the stopper disclosed in Patent Document 1 is attached to the opening of a container containing a solution and has a single groove that causes the gas to spiral, making it difficult to uniformly distribute the gas flow that reaches the liquid surface, which can result in a long time required to separate the gaseous substances from the solution.

[0005] The present disclosure has been made in view of the above, and aims to provide a separation tool that can shorten the time required to separate gaseous substances dissolved in a solution. [Means for solving the problem]

[0006] The separation device of the present disclosure that achieves the above-mentioned object is a separation device that separates gaseous substances from a solution contained in a container, and has a first end, a second end, and a side surface located between the first end and the second end, and on the side surface, a plurality of gas introduction grooves that swirl gas and introduce it into the container are formed between the first end and the second end, and a discharge hole is formed between the center of the second end and the center of the first end to discharge the gaseous substance separated from the solution together with the gas. [Effects of the Invention]

[0007] According to the present disclosure, the time required to separate gaseous substances dissolved in a solution can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing the overall configuration of a separation device 10 and a separation system 100 equipped with a separation tool 3 according to the present embodiment. [Figure 2] A perspective view of the separation tool 3 [Figure 3] Side view of separation tool 3 [Figure 4] 1 is a flowchart illustrating the operation of the separation system 100. [Figure 5] FIG. 10 is a diagram showing the state of gas flowing through the groove 3d of the separation tool 3 during operation of the separation system 100. [Figure 6] 1 is a perspective view of a separator 3A according to Comparative Example 1. [Figure 7] FIG. 7 is a diagram showing an example of the configuration of a separation system 100A using the separation tool 3A shown in FIG. [Figure 8] 1 is a table showing the relationship between the number of grooves in the separator and the concentration time of the solution 4 at the same gas flow rate in Examples and Comparative Examples. [Figure 9] Graph of another example showing the relationship between the gas flow rate, the number of grooves in the separator, and the concentration time of the solution 4. [Figure 10] FIG. 1 shows a first modified example of the container 2. [Figure 11] FIG. 2 shows a second modified example of the container 2. [Figure 12] FIG. 10 shows a modified example of the separator 3. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments for carrying out the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to these embodiments. In the following description of the drawings, identical or similar parts are designated by identical or similar reference numerals. Furthermore, the embodiments shown below are merely examples of devices and methods for embodying the technical ideas of the present disclosure, and the technical ideas of the present disclosure do not limit the structure, arrangement, etc. of component parts to those described below. Various modifications can be made to the technical ideas of the present disclosure within the technical scope defined by the claims.

[0010] 1 is a diagram showing the overall configuration of a separation device 10 equipped with a separator 3 according to this embodiment and a separation system 100. The separation system 100 is an apparatus for separating gaseous substances from a solution 4 in which the gaseous substances are dissolved and capturing the separated gaseous substances. Examples of gaseous substances include volatile substances such as methanol, ethanol, acetonitrile, water, and dimethyl sulfoxide (DMSO), as well as carbon dioxide and oxygen.

[0011] The separation system 100 includes a pressure reducing section 11 that reduces the pressure inside the container 2, a capture section 15 that captures gaseous substances, a pipe 12, and a separation device 10. The pressure reducing section 11 is, for example, an exhaust air pump. A pipe 12 is connected to the pressure reducing section 11, and a capture section 15 is provided midway along the pipe 12. The capture section 15 does not necessarily have to be provided, and can be omitted, for example, if there is no problem in releasing the separated gaseous substances directly into the atmosphere. The tip of the pipe 12 is inserted into the separation tool 3. A valve (not shown) can be provided at an appropriate location on the pipe 12, and the amount of suction gas can be adjusted by adjusting the opening of the valve.

[0012] The separation device 10 includes a container 2 and a separator 3. The container 2 is, for example, a centrifuge tube or similar container made of glass or plastic. In this embodiment, a general-purpose product (such as a Falcon tube) with a constant inner diameter from the opening 2a of the container 2 to near the bottom is used as the container 2. The container may have a shape that tapers from the opening side toward the inside of the container, and the separator may be shaped to fit tightly against the tapered inner diameter. "Fit tightly" means that the separator is airtight to the extent that gas does not substantially flow in or out from the side of the separator, except for a gas inlet groove (described later) formed on the side of the separator.

[0013] The container 2 contains a solution 4. The container 2 is supported by a support member (not shown) in a state where the bottom of the container 2 is immersed in the water in the water tank 14. Heating the water in the water tank 14 promotes the evaporation and separation of gaseous substances such as volatile substances from the solution 4. In the example of FIG. 1, the separating tool 3 is immersed in the water tank 14. However, instead of immersing the separating tool 3 in the water tank 14, a bead bath filled with aluminum beads may be used, or the separating tool 3 may be heated by blowing hot air onto the container 2. Furthermore, heating may not be necessary depending on the type of solution 4 containing gaseous substances, the outside temperature, etc.

[0014] A separator 3 is inserted into the inner space 2b of the container 2. The separator 3 is a columnar member that separates and discharges gaseous substances dissolved in the solution 4 contained in the container 2. The separator 3 is inserted from the opening 2a of the container 2 toward the bottom of the container 2 in an insertion direction D1 and positioned near the surface 4a of the solution 4 in the container 2, a fixed distance L1 away. The fixed distance L1 corresponds to the distance from the highest point on the surface 4a of the solution 4 due to surface tension on the inner circumferential surface of the container 2 to the second end 3b of the separator 3. The fixed distance L1 is set, for example, to a value that allows the separator 3 to be close to the surface 4a of the solution 4 so that the solution 4, which is blown up by the gas blown into the container 2 through the separator 3 when the pressure reducing unit 11 is activated, is not sucked into the piping 12.

[0015] For example, by reducing the discharge volume of the pressure reducing section 11, the force of the gas flow blown in from the side surface 3a of the separator 3 is reduced, so the liquid surface is not violently stirred up and the distance L1 can be reduced. However, if the discharge volume (gas blown in volume) is reduced too much, the solution is hardly stirred and becomes close to a static state, which means that it takes a long time to separate the gaseous substances.

[0016] On the other hand, if the amount of exhaust by the pressure reducing section 11 is too large, the gas is blown in from the side surface 3a of the separator 3 at high speed, causing the liquid surface to be violently agitated and splashed. Some of the splashed solution not only adheres to the inner wall (inner peripheral surface 2c) of the container 2, but also is sucked in at high speed from the exhaust hole. As a result, even if the distance L1 is increased, the gaseous substances are not separated very much, and the solution is likely to be sucked directly into the piping 12, which is not preferable. Furthermore, as will be described later, even if the gas flow blown in from the side surface 3a of the separator 3 is unevenly distributed, the gaseous substances are not separated very much, and the solution is likely to be sucked directly into the piping 12, which is not preferable. Therefore, a configuration in which the separator is disposed near the liquid surface (surface 4a of the solution 4) is preferable.

[0017] Next, an example of the configuration of the separator 3 will be described with reference to Figures 2 and 3. Figure 2 is a perspective view of the separator 3. Figure 3 is a side view of the separator 3.

[0018] The separation tool 3 has a first end 3c located on the side opposite the solution 4 side of the separation tool 3, a second end 3b located on the solution side of the separation tool 3, a side surface 3a located between the first end 3c and the second end 3b, a groove portion 3d, and a through hole 3e.

[0019] The material of the separator 3 is not particularly limited, but is preferably a material that is stable even when in contact with the solution. For example, fluorine-based rubber or fluorine-based resin such as polytetrafluoroethylene (PTFE) is preferable. Other than fluorine-based materials, depending on the type of solution, general-purpose rubbers such as silicone rubber, polyisobutylene rubber, acrylic rubber, styrene-butadiene rubber, butadiene rubber, isoprene rubber, and chloroprene rubber may be used, or thermoplastic elastomers such as polyethylene elastomer and polyisobutylene elastomer may be used.

[0020] The grooves 3d are multiple inclined grooves for introducing gas that extend from the first end 3c to the second end 3b. The separation tool 3 shown in FIG. 2 has six grooves 3d formed therein. The grooves 3d are formed on the side surface 3a of the separation tool 3 and are inclined at a predetermined angle relative to the second end 3b. The inclination angle θ of the grooves 3d is preferably 10 to 45°, and more preferably 15 to 25°, from the viewpoint of increasing the flow rate of the gas introduced into the container 2 while improving the separation efficiency of the grooves 3d. The grooves are an example of gas introduction grooves.

[0021] The gas introduced into groove 3d is preferably air. When the type of gaseous substance requires separation from the solution in an inert gas atmosphere (e.g., nitrogen gas or argon gas), at least the entire container 2 into which separation tool 3 is inserted may be placed under an inert gas atmosphere. Groove 3d extends clockwise from first end 3c to second end 3b as viewed from above separation tool 3, but may also extend counterclockwise.

[0022] It is preferable to have multiple grooves 3d. If there is only one groove, the injected gas flow is likely to be uneven, and depending on the gas flow rate, the liquid level may not be stable. The number of grooves is preferably 2 to 10. If there are two grooves, they are preferably spaced 180° apart, and if there are three grooves, they are preferably spaced 120° apart. In the following cases, whether there are four, five, or even ten grooves, it is preferable to arrange the gas grooves at equal intervals.

[0023] The depth and width of groove 3d are appropriately set depending on the dimensions of separator 3. The cross-sectional area of ​​groove 3d is preferably 0.4 to 10% of the cross-sectional area of ​​separator 3, and more preferably 1.6 to 3.5% of the cross-sectional area of ​​separator 3. If the cross-sectional area of ​​groove 3d is less than 0.4% of the cross-sectional area of ​​separator 3, the solution 4 blown up by the gas blown through groove 3d may reach the top of container 2 and enter the pump. On the other hand, if the cross-sectional area of ​​groove 3d exceeds 10% of the cross-sectional area of ​​separator 3, the gas blown through groove 3d may only hit the top of solution 4, stirring only the top of solution 4, which may result in an insufficient effect of promoting vaporization of the gaseous substance.

[0024] The cross-sectional area of ​​the grooves 3d is preferably the same for all grooves. If the cross-sectional areas are different, it is preferable to alternately combine grooves with larger cross-sectional areas when there are an even number of grooves. For example, if there are six grooves, three of them have a large cross-sectional area and the remaining three have a small cross-sectional area, which enables stable separation.

[0025] The groove 3d is preferably formed in a spiral shape on the side surface 3a of the separating tool 3 from the first end 3c to the second end 3b of the separating tool 3.

[0026] The side surface 3a, from the first end 3c to the second end 3b, contacts the inner circumferential surface 2c of the container 2 shown in FIG. 1. That is, the separation tool 3 is formed so that the entire side surface 3a, excluding the groove 3d, contacts the inner circumferential surface 2c of the container 2. As a result, a space 3d1 (see FIG. 3) is formed between the groove 3d and the inner circumferential surface 2c of the container 2. This space 3d1 communicates from the first end 3c to the second end 3b of the separation tool 3, and serves as a path for introducing gas. Therefore, the gas introduced from the first end 3c of the separation tool 3 to the groove 3d is guided to the second end 3b of the separation tool 3 and sprayed onto the solution 4 without diffusing to the area excluding the groove 3d (between the side surface 3a of the separation tool 3 and the inner circumferential surface 2c of the container 2).

[0027] The through-hole 3e is a discharge hole for discharging the gaseous substance separated from the solution 4 together with the gas introduced into the container 2 through the groove 3d. The through-hole 3e is formed between the center of the second end 3b and the center of the first end 3c.

[0028] The cross-sectional area of ​​the through-hole 3e is preferably equal to or larger than the total cross-sectional area of ​​the plurality of grooves.

[0029] When gas is blown from the side surface 3a of the separator 3 onto the solution surface (surface 4a of the solution 4) in a swirling flow, the entire solution rotates due to the swirling gas flow. As a result of the rotation of the solution, the centrifugal force acting on the solution acts on the inner circumferential surface C2 of the container 2, causing the liquid level to rise. However, the swirling gas flow exerts a downward force, and the gas is sucked through the through-hole 3e formed in the center of the separator 3, causing a decrease in air pressure near the center of the liquid surface. Furthermore, by positioning the separator 3 near the liquid surface, splashing of the liquid surface can be prevented. Therefore, even if a certain amount of gas is blown in, the balance between these factors reduces the liquid level from fluctuating significantly. As a result, it becomes possible to stably maintain the lower end of the separator 3 close to the liquid surface.

[0030] Next, the operation of the separation system 100 will be described with reference to Figures 4 and 5. Figure 4 is a flowchart for explaining the operation of the separation system 100. Figure 5 is a diagram showing the state of gas flowing in the groove 3d of the separation tool 3 and the like when the separation system 100 is in operation.

[0031] With the pipe 12 extending from the capture part 15 inserted into the through-hole 3e of the separation tool 3 (step S1), the separation tool 3 is inserted into the container 2 (step S2).

[0032] 1, the separator 3 is placed close to the solution 4, and then the pressure reducing unit 11 is operated (activated) (step S3). This reduces the pressure inside the container 2, and the gas on the first end 3c side of the separator 3 is taken into the groove 3d and blown into the container 2 at high speed through the groove 3d.

[0033] The separation tool may be inserted initially at a position away from the solution surface while the pressure reduction unit is operated, and then, with the operation of the pressure reduction unit kept constant, the distance from the solution surface is gradually decreased until the separation tool is held at a distance close enough to prevent liquid from being drawn in through the through-holes. Alternatively, with the operation of the pressure reduction unit kept low, the separation tool may be placed near the liquid surface, and the exhaust volume of the pressure reduction unit may be gradually increased until the operation of the pressure reduction unit is kept constant at an exhaust volume by the pressure reduction unit that prevents liquid from being drawn in through the through-holes.

[0034] When the same amount of the same solution is taken into the container, stable separation of gaseous substances is possible by reproducing the proximity position of the separator at the constant exhaust volume of the pressure reducing section described above. Also, stable separation of gaseous substances is possible by reproducing the exhaust volume of the pressure reducing section when placed at a constant proximity position.

[0035] The gas injected at high speed reaches the solution 4 while spirally swirling, for example, along the inner circumferential surface 2c of the container 2. As a result, the solution 4 is stirred up by the airflow, accelerating the vaporization of the gaseous substance. The vaporized gaseous substance is captured by the capture unit 15 through the pipe 12 (step S4).

[0036] Next, a comparative example 1 of the separator 3 according to the present embodiment will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is a perspective view of a separator 3A according to comparative example 1 of the prior art. Fig. 7 is a diagram showing an example of the configuration of a separation system 100A using the separator 3A shown in Fig. 6.

[0037] The separator 3A is formed in a truncated cone shape so as to close the opening 2a of the container 2. A groove 3d is formed on the side surface 3a of the separator 3A.

[0038] When a separation tool 3A having such a shape is attached to the opening 2a of the container 2, the inner diameter of the container 2 is constant from the opening 2a to near the bottom, so a gap GP is created between the side surface 3a of the separation tool 3A and the inner circumferential surface 2c of the container 2. Furthermore, because the separation tool 3A is provided near the opening 2a of the container 2, the distance L2 from the second end 3b of the separation tool 3A to the surface 4a of the solution 4 becomes long.

[0039] The airflow when the pressure reducing unit 11 is operated will be described with reference to Figure 7. When the pressure reducing unit 11 is operated while the separator 3A is attached to the container 2, the pressure inside the container 2 is reduced, and the gas on the first end 3c side of the separator 3A is drawn into the groove 3d. At this time, some of the gas passing through the groove 3d leaks out from the gap GP, and because the distance L2 is long, the momentum of the gas is significantly reduced by the time it reaches the solution 4. Therefore, it may take a long time to vaporize the gaseous substance from the solution 4.

[0040] In order to eliminate the gap GP, the shape of the vicinity of the opening of the container 2 may be made cone-shaped, but this would require the container 2 to have a special shape, which would increase the manufacturing cost of the container 2.

[0041] Furthermore, even if such a container 2 is manufactured, the force of the gas blown into the container 2 will be significantly reduced by the time it reaches the solution 4 because the distance L2 from the separator 3A to the solution 4 is long.

[0042] When the separation tool 3A of Comparative Example 1 and the separation tool 3 according to the present embodiment were used under the same conditions, the concentration time of the solution 4 was approximately 200 minutes for the separation tool 3A and approximately 39 minutes for the separation tool 3. In other words, it was confirmed that the concentration time of the solution 4 can be reduced to one-fifth by the separation tool 3 according to the present embodiment.

[0043] In the case of Figure 7, if the container opening is shaped to expand in diameter upward and the side of the separator 3A and the container opening are in close contact except for the groove, the above-mentioned problems can be solved. However, as shown below as Comparative Example 1, in the case of a single groove, the swirling flow becomes biased, and the liquid surface tends to become unstable.

[0044] As will be described below, it is preferable that the number of grooves is at least two. [Example]

[0045] The present invention will now be described in more detail with reference to examples. Figure 8 shows the relationship between the number of grooves 3d and the concentration time (concentration performance) of the solution 4 when a conical tube is used as the container.

[0046] The conical tube is tapered toward the tip (the tip is rounded) compared to the container shown in Figure 1 etc. The conical tube used in the experiment had a total length of approximately 170 mm, an inner diameter of approximately 14 mm, an inner diameter at the tip of approximately 5 mm, and a tapered slope length of approximately 22 mm.

[0047] The only difference between Examples 1 to 9 and Comparative Example 1 was the number of grooves in the separator, but the same shape was used. Water was used as the liquid.

[0048] The inclination angle θ of the groove portion 3d is about 20°, and the width and depth of the groove portion 3d are set so that the cross-sectional area of ​​the entire groove is 6.25 mm 2 The length of the separator 3 is designed depending on the type and amount of liquid to be handled.

[0049] In the measurements in Figure 8, the distance (distance L1) from the separator 3 to the solution 4 during standing was the same, approximately 24 mm. The distance from the separator 3 to the solution 4 varies depending on the type of liquid, the size of the container, etc., but it is preferable to set it to a distance not exceeding twice the inner diameter, and more preferably a distance around the inner diameter of the container. In the case of a conical tube, it was preferable for the distance to be equal to or greater than the inner diameter of the container (the inner diameter excluding the conical part).

[0050] The measurement was carried out five times under the same conditions, and the average value was calculated.

[0051] The time n in Figure 8 represents the time (sec) required for 500 μl of tap water (solution) placed in a 14 ml conical tube to evaporate. More specifically, a separator 3 with each number of grooves was placed in the conical tube, a vacuum pump was used to stir the liquid surface, and the time it took for the water to evaporate was measured.

[0052] In FIG. 8, the scattering was evaluated according to the following criteria. ◎: The solution surface (water surface) was at a position of 17 mm, there was no scattering of the solution, and it was stirred evenly. ○: The solution surface was at a position of 20 mm, and there was some solution splashing, but it did not reach the piping. ×: The solution surface was at a position of 24 mm, and the solution splashed violently from the top surface of the separator to the piping, and the solution also adhered to the piping (the splashing reduced the amount of remaining solution, which significantly shortened the concentration time).

[0053] From the above, it was confirmed that separation and vaporization of gaseous substances can be performed efficiently when the number of grooves is 2 or more. 8、9 It was found that this method can achieve concentration in a relatively short time.

[0054] Figure 9 compares the concentration speed of a methanol (MeOH) solution between a test tube with one groove (prior art), two grooves according to the present embodiment, and eight grooves. The outer shape of the separator is the same for all of them, with only the number of grooves differing. The P2 plug is a conventional separator (plug) that also serves as a lid. The test tubes with groove 8 (eight grooves) and groove 2 (two grooves) are separators (plugs) according to the present embodiment, with the same diameter but the number of grooves differing.

[0055] The conditions are as follows: 1 ml of methanol (MeOH) with a concentration of 99.7% is placed in a 10 ml container, and the concentration rate is measured at a gas (air) flow rate of 18 L / min.

[0056] However, for a case with two grooves, an example is given in which the flow rate is initially 15 L / min and then 18 L / min after 5 minutes.

[0057] The concentration rate was measured by measuring the volume of the tare with a precision balance every hour and then measuring the weight. "Peltier -10°C" indicates the set temperature when the methanol gas that was vaporized and sucked into the vacuum pump was liquefied by the Peltier device, and was set to -10°C.

[0058] It can be seen from FIG. 9 that the separation tool (plug) having a plurality of grooves according to the present embodiment significantly reduces the concentration time compared to a conventional plug with a single groove.

[0059] In addition, in the case of two grooves, if the flow rate is initially 15 L / min and then increased to 18 L / min after 5 minutes, the concentration time can be substantially the same as that of a plug with eight grooves.

[0060] In this way, by changing the flow rate from a low state to a high state, concentration can be performed more efficiently.

[0061] Next, a modified example of the container 2 will be described with reference to FIGS.

[0062] Fig. 10 is a diagram showing a first modified example of the container 2. As shown in Fig. 10, even when the separator 3 is applied to a container 2 having a shape in which the cross-sectional area of ​​the bottom is larger than the cross-sectional area of ​​the opening 2a, the separator 3 can be provided near the solution 4. Furthermore, the inner circumferential surface near the opening of the container 2 comes into contact with the entire side surface 3a of the separator 3, thereby achieving the above-mentioned effect.

[0063] FIG. 11 is a diagram showing a second modified example of the container 2. The container 2 shown in FIG. 11 has a cylindrical member 2A and a bottomed member 2B that can be divided into two parts, upper and lower, and has a shape that allows them to be connected to each other at their respective flanges 2d. With the separator 3 attached to the upper cylindrical member 2A, the cylindrical member 2A is connected to the lower bottomed member 2B, and then the flanges 2d are fixed to each other with members such as screws or clips, thereby completing the container 2. Even when a container 2 that can be divided into upper and lower parts like this is used, the separator 3 can be provided near the solution 4. Furthermore, the effect described above can be obtained by having the inner circumferential surface of the cylindrical member 2A contact the entire side surface 3a of the separator 3.

[0064] FIG. 12 is a diagram showing a modified example of the separation tool 3. The separation tool 3 shown in FIG. 12 has an attachment portion 3f to facilitate attachment and detachment of the separation tool 3. The attachment portion 3f is a cylindrical member that can be gripped by a guide member (not shown). The guide member is a tool for inserting the separation tool 3 into the container 2 or removing the separation tool 3 from the container 2 while gripping the attachment portion 3f of the separation tool 3. For example, a recess 3f1 is formed on the outer periphery of the attachment portion 3f with which the grip portion of the guide member engages. By configuring the separation tool 3 in this way, it is particularly easy to remove the separation tool 3 from inside the container 2.

[0065] The configurations shown in the above embodiments are examples of the contents of the present disclosure, and may be combined with other known technologies, and parts of the configurations may be omitted or modified within the scope of the gist of the present disclosure.

[0066] This application claims priority based on Japanese Patent Application No. 2020-178774, filed on October 26, 2020, the entire contents of which are incorporated herein by reference. [Explanation of symbols]

[0067] 2 containers 2a opening 2c Inner surface 3 Separator 3a side 3b Second end 3c 1st end 3d groove 3d1 space 3e Through hole 4 solution 4a surface 10 Separation device 11 Pressure reducing section 100 Separation System L1 distance

Claims

1. A separator for separating a gaseous substance from a solution contained in a container, A first end portion; A second end; a side surface located between the first end and the second end; and a plurality of gas introduction grooves are formed on the side surface between the first end and the second end to swirl the gas and introduce it into the container; a discharge hole is formed between a center of the second end portion and a center of the first end portion, through which the gaseous substance separated from the solution is discharged together with the gas; the side surface contacts the inner circumferential surface of the container in an entire region from the first end to the second end excluding the gas introduction groove; Separation tool.

2. Two to ten of the gas introduction grooves are formed on the side surface. The separation tool according to claim 1 .

3. The separation tool according to any one of claims 1 or 2, The container; A separation device comprising:

4. A separation device according to claim 3; a pressure reducing unit that reduces the pressure in the container; A separation system comprising:

Images