Carbon dioxide fixation device and carbon dioxide fixation method

Abstract

To provide a technology for immobilizing carbon dioxide in compressed air in a simple manner. [Solution] The device comprises a joint part, a cap part, and a tube part, and the cap part has a joint through-hole in the center of its top surface and a vent hole for exhaust near the edge of the top surface. One side of the joint part is connected to a tube from a compressed air circuit and the other side is connected to one side of the tube part. The joint part comprises an orifice joint and a partition joint, and the orifice joint has an orifice for adjusting air pressure. The partition joint is inserted into the joint through-hole in the cap part and fixed with a nut. The cap part has a thread that can be screwed into the opening of a carbon dioxide fixation container containing water and calcium hydroxide. The other end of the tube part has a nozzle for spraying air, and the nozzle is inserted into the mixed liquid of water and calcium hydroxide in the carbon dioxide fixation container.

Description

[Technical Field]

[0001] The present invention relates to a carbon dioxide fixation device, and more particularly to a technology for a carbon dioxide fixation device used in a compressed air pressure circuit. [Background technology]

[0002] Conventionally, the main method for recovering carbon dioxide from compressed air has been to adsorb it using a special filter or the like. However, with regard to processing after carbon dioxide absorption, it is difficult for general businesses to extract carbon dioxide from the filter, so after retrieving the filter, it is necessary to incinerate it in an incinerator equipped with carbon dioxide emission absorption equipment. Currently, there are few incinerators equipped with such facilities, and if waste is incinerated in a general incinerator, the carbon dioxide that has been absorbed is released into the atmosphere. Therefore, there was a need for a technology that could easily immobilize carbon dioxide in compressed air.

[0003] To address these problems, various techniques have been proposed, such as a carbon dioxide gas recovery device (see Patent Document 1), which has become a publicly known technique. More specifically, this is a device that can absorb and recover carbon dioxide gas efficiently and in an energy-efficient manner, and is a technology that includes a reaction tank with a built-in shower nozzle for calcium hydroxide aqueous solution that is placed above the intake port for exhaust gas containing carbon dioxide gas, and a recovery tank that recovers a treatment liquid containing calcium carbonate from the bottom of the reaction tank. However, this carbon dioxide capture device is large-scale and is not intended for compressed air, so the above problems are not resolved. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-28622 Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a carbon dioxide fixation device and a carbon dioxide fixation method that can fix carbon dioxide in a compressed air pressure circuit by a simple method and contribute to improving the global environment. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a carbon dioxide fixation device that fixes carbon dioxide in a compressed air pressure circuit, comprising a joint portion, a cap portion, and a tube portion, the cap portion having a joint through-hole in the center of its top surface and an exhaust vent hole in a portion near the edge of its top surface, one end of the joint portion connected to a tube from the compressed air pressure circuit and the other end connected to one side of the tube portion, the joint portion comprising an orifice joint and a partition joint, the orifice joint having an orifice for adjusting air pressure, the partition joint inserted into the joint through-hole in the cap portion and fixed with a nut, the cap portion having a thread that can be screwed into an opening of a carbon dioxide fixation container containing water and calcium hydroxide, and the other end of the tube portion having an air outlet that is inserted into the mixed liquid of water and calcium hydroxide in the carbon dioxide fixation container.

[0007] The present invention also employs a means in which the carbon dioxide fixation device is constantly connected to piping in the compressed air pressure circuit.

[0008] Furthermore, the present invention employs a means in which the carbon dioxide fixation container is a polyethylene container.

[0009] Furthermore, the present invention provides a method for manufacturing a gas turbine engine, the method comprising: Diameter 0 We will take measures to ensure the accuracy is 0.1mm.

[0010] Furthermore, the present invention is directed to a method for manufacturing a valve having a vent hole and an orifice, the vent hole having a cross-sectional area larger than that of the orifice. 5 of 5 We will take measures that are 0 times faster.

[0011] Furthermore, the present invention employs a means in which a nozzle section is provided instead of a pipe section, one of the nozzle sections being connected to a joint section, the nozzle section branches the air from the joint section and sends it to two branch pipe sections, the branch pipe sections have ejection holes on the side surfaces near their ends, the ends of the branch pipe sections bend in directions away from each other, and the ejection holes of the two branch pipe sections are positioned to stir the liquid in the container in the same direction.

[0012] The present invention also provides a method for immobilizing carbon dioxide in a compressed air pressure circuit, comprising a carbon dioxide immobilization device comprising a joint portion, a cap portion, and a tube portion, the cap portion having a joint through-hole in the center of its upper surface and an exhaust vent hole in a portion close to the edge of its upper surface, one end of the joint portion being connectable to a tube from the compressed air pressure circuit and the other end being connected to one end of the tube portion, the joint portion comprising an orifice joint and a partition joint, the orifice joint having an orifice for adjusting air pressure, the partition joint being inserted into the joint through-hole in the cap portion and fixed with a nut, the cap portion being screwed onto the opening of a polyethylene container containing water and calcium hydroxide the polyethylene container has a thread that can be inserted into it and the water and calcium hydroxide are placed in the polyethylene container and stirred; the tube is inserted through the opening of the polyethylene container and the cap is screwed onto the opening; a tube is connected from the compressed air circuit to the orifice joint; air from the compressed air circuit is introduced into the polyethylene container, passes through the tube, and is sent into the mixture of water and calcium hydroxide, producing calcium carbonate from the carbon dioxide in the air in the compressed air circuit and the calcium hydroxide in the polyethylene container; the carbon dioxide fixation device is removed from the polyethylene container, the polyethylene container is capped and sealed, and the polyethylene container is recovered. [Effects of the Invention]

[0013] According to the carbon dioxide fixation device and carbon dioxide fixation method of the present invention, carbon dioxide can be fixed in a compressed air pressure circuit by a simple method, thereby contributing to improving the global environment. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is an overall schematic diagram showing an embodiment of a carbon dioxide fixation device according to the present invention. [Figure 2] 1 is a cross-sectional view showing the structure of a carbon dioxide fixation device according to the present invention. [Figure 3] FIG. 2 is an explanatory diagram showing the working process of the carbon dioxide fixation device according to the present invention. [Figure 4] FIG. 10 is an explanatory diagram showing another embodiment of the carbon dioxide fixation device according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The carbon dioxide fixation device and carbon dioxide fixation method according to the present invention are most characterized by their ability to fix carbon dioxide in the atmosphere within a compressed air pressure circuit in a simple manner. Hereinafter, embodiments of a carbon dioxide fixation apparatus and a carbon dioxide fixation method according to the present invention will be described with reference to the drawings. The carbon dioxide fixation device and carbon dioxide fixation method according to the present invention are not limited to the examples described below, and can be modified as appropriate within the scope of the technical concept of the present invention, i.e., within the scope of the shape, dimensions, structure, etc., that can achieve the same functional effects.

[0016] The present invention will be described with reference to FIGS. FIG. 1 is an overall schematic diagram showing an embodiment of a carbon dioxide fixation device according to the invention. FIG. 2 is a cross-sectional view showing the structure of a carbon dioxide fixation device according to the invention, where (a) is a cross-sectional view of the carbon dioxide fixation device attached to a polyethylene container, and (b) is an exploded cross-sectional view of the carbon dioxide fixation device. FIG. 3 is an explanatory diagram showing the working process of the carbon dioxide fixation apparatus according to the present invention. FIG. 4 is an explanatory diagram showing another embodiment of the carbon dioxide fixation device according to the present invention, in which (a) is a cross-sectional view of a nozzle portion for stirring a solution when fixating carbon dioxide, (b) is an overall perspective view of the nozzle portion, (c) is a schematic diagram explaining the nozzle portion and the flow of liquid inside a polyethylene container, (d) is a cross-sectional view showing a state in which the nozzle hole is housed inside a case, and (e) is a cross-sectional view showing a state in which the nozzle hole is widened.

[0017] The carbon dioxide fixation device 1 fixes carbon dioxide in a compressed air pressure circuit. Roughly speaking, part of the air in the compressed air pressure circuit is extracted and mixed with calcium hydroxide solution 92 in a polyethylene container 70, causing the carbon dioxide in the air to react with calcium hydroxide 90, resulting in calcium carbonate 93, which fixes the carbon dioxide. The carbon dioxide fixation device 1 is composed of a joint part 10 , a cap part 20 and a pipe part 30 . One end of the joint portion 10 is connected to a tube 84 from a compressed air circuit 80 , and the other end is connected to one end of the pipe portion 30 . The joint portion 10 is a portion that guides the air in the tube 84 into the polyethylene container 70 and also a portion that regulates the flow rate of the air 94 . The joint section 10 is composed of an orifice joint 11 and a partition joint 15 .

[0018] The orifice joint 11 forms the upper part of the joint part 10 and includes an orifice 12. It also has a one-touch joint structure 13 at the top and a male thread part 14 at the bottom. The orifice 12 is a hole with a diameter of approximately 0.1 mm. When air in the compressed air pressure circuit is drawn into the polyethylene container 70, if highly compressed air at approximately 0.7 MPa is directly introduced into the polyethylene container 70, the force of the air ejection will be too great and it will not mix well with the calcium hydroxide solution 92. Therefore, the orifice 12 is provided as a pressure-limiting hole to allow air with an appropriately regulated flow rate to enter the polyethylene container 70. By providing the orifice 12 with a diameter of approximately 0.1 mm, the air entering the polyethylene container 70 will be approximately 1 L / min. This prevents the air from becoming unruly within the polyethylene container 70 and ensures an appropriate flow rate for mixing the air 94 and calcium hydroxide solution 92. If the air is in a controlled compressed air circuit, it will not become clogged with dirt or dust, even if it is 0.1 mm in diameter. The one-touch joint structure 13 at the top of the orifice joint 11 allows the tube to be fixed simply by inserting it. Also, the tube can be separated with a simple operation. In this embodiment, it is conceivable that a plurality of polyethylene containers 70 may be replaced, so it is efficient if the tube 84 of the compressed air pressure circuit 80 can be easily connected and disconnected. The orifice joint 11 has a male threaded portion 14 at the bottom, which is connected to a female threaded portion 17 of the partition joint 15 .

[0019] The partition joint 15, together with the cap portion 20, covers the opening 71 of the polyethylene container 70, is for isolating the inside of the polyethylene container 70 from the outside. The partition joint 15 has a female threaded portion 17 at the top and a one-touch joint structure 16 at the bottom. In the middle is a threaded portion 18 for fixing the cap. The female threaded portion 17 is used to fix the partition joint 15 and the orifice joint 11. The one-touch joint structure 16 is used to connect the pipe portion 30 to the partition joint 15. By providing the one-touch joint structure 16, the pipe portion 30 can be fixed and connected simply by inserting it into the one-touch joint structure 16, and it can also be separated with a simple operation. If the pipe portion 30 is damaged during the fixing process, it can be easily replaced, which is convenient. The cap fixing screw portion 18 is a portion for fixing the partition wall joint 15 to the cap portion 20. The joint portion 10 including the partition wall joint 15 is inserted into the joint hole 21 of the cap portion 20, and the cap fixing screw portion 18 and the nut 60 are screwed together to sandwich the cap portion 20. By sandwiching them together, the joint portion 10 and the cap portion 20 are integrated. In addition, since the bottom of the partition joint 15 will come into contact with splashes of calcium hydroxide solution 92, the partition joint 15 itself can be made resistant to alkalinity, or the bottom parts such as the one-touch joint structure 16 can be made resistant to corrosion.

[0020] The cap part 20 has a thread that can be screwed into the opening 71 of the polyethylene container 70, which is a carbon dioxide fixation container, and is a part that screws into the opening 71 of the polyethylene container 70 to fix the carbon dioxide fixation device 1 to the polyethylene container 70, which is a carbon dioxide fixation container. The cap part 20 has roughly the same shape as a normal cap for the polyethylene container 70. A joint hole 21 is opened in the center of the top surface of the cap part 20. This hole is for inserting the joint part 10. A vent hole 22 is opened near the edge of the top surface. The vent hole 22 is a hole through which the air 94 sent from the compressed air pressure circuit 80 into the polyethylene container 70 is finally exhausted. If the vent hole 22 is small, the air 94 inside the polyethylene container 70 will not be able to be exhausted, the pressure inside the polyethylene container 70 will increase, and the amount of air 94 flowing into the polyethylene container 70 will decrease. Therefore, the hole needs to be large enough to maintain the air pressure inside the polyethylene container 70 at 0.1 MPa. Measurements have shown that the air pressure inside the polyethylene container 70 can be maintained at approximately 0.1 MPa if the area of ​​the diameter of the vent hole 22 is approximately 50 times the area of ​​the diameter of the orifice 12. Therefore, it is preferable that the area of ​​the diameter of the vent hole 22 is approximately 50 times the area of ​​the diameter of the orifice 12. It is also possible to enlarge the diameter of the vent hole 22 by more than 50 times, but doing so would increase the amount of calcium hydroxide solution 92 that would leak from the polyethylene container 70 if the polyethylene container 70 were accidentally knocked over, so the vent hole 22 should not be made larger than necessary.

[0021] The pipe portion 30 is a structure for ejecting the air 94 contained in the polyethylene container 70 into the calcium hydroxide solution 92 . The tube portion 30 is an elastic tube, one end of which is connected to the one-touch joint structure 16 of the partition joint 15, and the other end of which has a nozzle 31 that is inserted into the calcium hydroxide solution 92 and releases air from the nozzle 31. Since a part of the pipe portion 30 is immersed in an alkaline solution, it is necessary to use a material that is resistant to alkali, such as polyethylene. In this embodiment, the polyethylene container 70 is the part where carbon dioxide is immobilized. This container needs to be resistant to alkalis because it stores the calcium hydroxide solution 92 for a long period of time. The polyethylene container 70 is made of polyethylene, so it is resistant to alkalis. The polyethylene container 70 is, for example, a container of about 2 L, and is available at low cost. After immobilizing the carbon dioxide, the original lid can be used as a sealing cap 72, allowing the container to be transported in a sealed state and appropriately disposed of.

[0022] The process of fixing carbon dioxide will be explained with reference to FIG. (Process 1) Prepare a commercially available polyethylene container. Clean the inside thoroughly so as not to affect the reaction of calcium hydroxide 90. It is recommended to prepare multiple polyethylene containers, as they will be replaced at regular intervals. Until use, the original cap is used as a sealing cap 72 to keep the container sealed so that foreign matter does not get inside. (Process 2) The sealing cap 72 is removed, and specified amounts of water 91 and calcium hydroxide 90 are poured into the opening 71 of the polyethylene container 70. The mixture is stirred to form a calcium hydroxide solution 92. Since calcium hydroxide 90 is difficult to dissolve in water, it is stirred sufficiently to form a calcium hydroxide solution 92.

[0023] (Step 3) The carbon dioxide fixation device 1 is inserted into the polyethylene container 70, and the threaded portion of the opening 71 is screwed onto the threaded portion of the cap portion 20. The nozzle 31 at the tip of the tube portion 30 is immersed in the calcium hydroxide solution 92. (Step 4) The tube 84 on the compressed air pressure circuit 80 side is connected to the carbon dioxide fixation device 1. Because of the one-touch joint structure 13, the connection between the tube 84 and the joint portion 10 is completed simply by inserting the tube 84 into the one-touch joint structure 13 of the orifice joint 11. The valve 83 is opened, and the air 94 in the air supply pipe 81 of the compressed air pressure circuit 80 is sent to the carbon dioxide fixation device 1 via the tube 84 . The sent air passes through the inside of the pipe portion 30 and is sprayed from the nozzle 31 into the calcium hydroxide solution 92. The carbon dioxide in the air reacts with the calcium hydroxide 90 to produce calcium carbonate 93. The calcium carbonate 93 floats in the calcium hydroxide solution 92 as a solid. Air 94 leaves calcium hydroxide solution 92, rises within polyethylene container 70, and is released into the atmosphere through vent hole 22 in cap portion 20. Therefore, it can be said that a portion of the carbon dioxide in the air 94 in the compressed air pressure circuit 80 was fixed as calcium carbonate 93 in the polyethylene container 70, thereby reducing the carbon dioxide in the air.

[0024] (Step 5) After the carbon dioxide has been immobilized for a certain period of time, the polyethylene container 70 is removed from the carbon dioxide immobilization device 1 and sealed with a sealing cap 72. Because the calcium carbonate 93 in the polyethylene container 70 is sealed, it is easy to move, and multiple polyethylene containers 70 can be easily managed. (Step 6) The polyethylene containers are collected and the calcium carbonate in the solution is recovered by a specialist company. The recovered calcium carbonate can be used as a material for concrete or resin. The carbon dioxide fixation device is connected to the piping in the compressed air pressure circuit except when it is replaced, so that it is always connected and can always fix carbon dioxide.

[0025] As described above, according to this embodiment, carbon dioxide can be immobilized in a compressed air pressure circuit by a simple method, thereby contributing to improving the global environment.

[0026] The method for immobilizing carbon dioxide using the carbon dioxide immobilization device 1 has been explained, but by changing the shape of the jetting part, it is possible to more efficiently proceed with the immobilization of carbon dioxide. A modified example will be described with reference to FIG. Instead of the pipe portion 30, a nozzle portion 40 is provided. The nozzle portion 40 has a plurality of ejection holes 43, and can agitate the calcium hydroxide solution 92 while rotating it using air pressure. 4(a) and (b), the nozzle portion 40 is elongated as a whole, and its length is roughly the same as that of the pipe portion 30. In terms of appearance, it is covered with an outer case 55, and has an inner case 50 inside thereof. The nozzle section is generally composed of an inner case 50 , an outer case 55 and a branch pipe section 41 .

[0027] The inner case 50 is made up of a connecting pipe 51, a branching portion 52, an opening portion 53, and an O-ring fixing groove 54. The inner case 50 is made entirely of hard resin. The connecting pipe 51 is a pipe portion that connects the nozzle portion 40 to the joint portion 10. As in the case of the pipe portion 30, the end portion is inserted into the one-touch joint structure 16 of the bulkhead joint 15, thereby connecting and fixing to the joint portion 10. Branching portion 52 is a space created inside inner case 50 as an extension of connecting pipe 51. Branching portion 52 has two holes at the bottom, and two branch pipe portions 41 are connected to these holes. An opening 53 is provided in the lower part of the inner case 50 to guide the branch pipe 41 to the outside. The branch pipe portion 41 passes through the opening 53 and comes out to the outside. An O-ring fixing groove 54 for placing an O-ring 61 is provided in the upper part of the inner case 50. The O-ring 61 is used to align the position of the O-ring fixing groove 54 of the inner case 50 with the position of the first groove portion 57 or the second groove portion 58 of the outer case 55 and to maintain this state.

[0028] The outer case 55 is a part that adjusts the degree of expansion of the branch pipe portion 41. The outer case 55 is made up of an opening 56, a first groove 57, a second groove 58, and a pipe position restricting portion 59. As shown in Figures 4(a) and (b), it has a shape that covers the entire nozzle portion 40. From the outside, it has an opening 56 at the bottom, from which the branch pipe portion 41 protrudes. The bottom portion is the pipe position restricting portion 59, which contacts the bent portion 42 of the branch pipe portion 41 to adjust the opening degree of the branch portion 52. A first groove 57 and a second groove 58 are provided on the inside of the upper part of the outer case 55. The outer case 55 is fixed so that the first groove 57 or the second groove 58 is located at the position of the O-ring fixing groove 54 of the inner case 50. In the nozzle section 40, the air from the joint section is branched and jetted from the jet holes 43 of the two branch pipe sections 41. The branch pipe section 41 is connected to the branch section 52 of the inner case 50 and is a pipe that extends out from the lower part of the inner case 50. It is made of the same material as the pipe section 30. The branch pipe section 41 is made up of two sections and is thinner than the pipe section 30. The bent portions 42 at the ends of the branch pipes are bent in directions away from each other, and the nozzle holes 43 of the two branch pipes 41 are positioned so as to stir the calcium hydroxide solution 92, which is the liquid in the container, in the same direction.

[0029] The effect of the jet holes 43 will be described with reference to FIG. 4(c). The positions of the nozzle holes 43 of the branch pipe portion 41 are symmetrical with respect to the center point when the nozzle portion 40 is viewed from above. Therefore, the air 94 coming out of the nozzle holes 43 rotates clockwise on the paper around the axis. In accordance with the flow of the air 94, the calcium hydroxide solution 92 as a whole also flows clockwise, creating an overall flow and enhancing the stirring effect.

[0030] 4(d) and (e), the movement of the nozzle portion 40 will be described. As mentioned above, the stirring effect can be improved by widening the ejection holes 43 of the branch pipe portion 41, but when inserting the nozzle portion 40 into the polyethylene container 70, the area around the ejection holes 43 gets caught, making it difficult to insert the nozzle portion 40 into the polyethylene container 70. Therefore, when the nozzle portion 40 is inserted into the polyethylene container 70, the bent portion 42, which is the branch pipe portion 41 near the nozzle hole 43, is closed, and after the insertion is completed, the bent portion 42 is opened. To close the branch pipe 41, the outer case 55 is lowered relative to the inner case 50, as shown in Figure 4(d). The bent portion 42 of the branch pipe 41 comes into contact with the edge of the opening 56 of the outer case 55 and closes. The bent portion 42 closes until it comes into contact with the pipe position restricting portion 59. By achieving this state, the nozzle portion 40 can be easily inserted into the opening 71 of the polyethylene container 70. The O-ring 61 is pressed against the first groove portion 57, so this state is maintained. To open the branch pipe 41, the outer case 55 is raised relative to the inner case 50, as shown in Figure 4(e). The bent portion 42 of the branch pipe 41 comes into contact with the pipe position restricting portion 59 of the outer case 55 and begins to open. By achieving this state, the bent portion 42 opens, enhancing the stirring effect. The O-ring 61 is pressed against the second groove portion 58, so this state is maintained.

[0031] Thus, the carbon dioxide fixation device according to the present invention can fix carbon dioxide in a compressed air pressure circuit in a simple manner, thereby contributing to improving the global environment.

[0032] Furthermore, by using polyethylene containers, they can be easily procured and carbon dioxide fixation devices can be utilized.

[0033] Furthermore, by adjusting the flow rate of air to the carbon dioxide fixation device using the orifice, the calcium hydroxide solution 92 and air can be efficiently agitated.

[0034] Furthermore, by making the cross-sectional area of ​​the vent hole approximately 50 times that of the orifice, carbon dioxide can be stably fixed without increasing the pressure inside the container, and the amount of leakage can be reduced even if the container falls over.

[0035] Furthermore, by using the branch pipe portion, the stirring efficiency can be improved. [Industrial Applicability]

[0036] The carbon dioxide fixation device according to the present invention is considered to have great industrial applicability as a technology that can easily fix carbon dioxide in a compressed air pressure circuit. [Explanation of symbols]

[0037] 1. Carbon dioxide fixation device 10 Joint 11 Orifice joint 12 Orifice 13 One-touch joint structure 14 Male thread 15 Bulkhead joint 16 One-touch joint structure 17 Female thread 18 Cap fixing screw 20 Cap part 21 Joint hole 22 Vent hole 30 Pipe section 31 spout 40 Nozzle section 41 Branch pipe section 42 Bend 43 Spout hole 50 inner case 51 Connecting pipe 52 Branch 53 Opening 54 O-ring fixing groove 55 outer case 56 Opening 57 First groove 58 Second groove 59 Pipe position regulation part 60 nuts 61 O-ring 70 Polyethylene containers 71 Opening 72 Sealing cap 80 Compressed air pressure circuit 81 Air pipe 82 Joint 83 Valve 84 tubes 90 Calcium hydroxide 91 water 92 Calcium hydroxide solution 93 Calcium Carbonate 94 Air

Claims

1. A carbon dioxide fixation device that fixes carbon dioxide in a compressed air pressure circuit, The connector comprises a joint portion, a cap portion, and a tube portion, The cap has a joint through-hole in the center of the top surface, and an exhaust vent hole near the edge of the top surface. one of the joint portions is connected to a tube from the compressed air circuit, and the other is connected to one of the pipe portions; The joint portion comprises an orifice joint and a partition joint, The orifice joint has an orifice for adjusting air pressure, The partition wall joint is inserted into the joint through-hole of the cap portion and fixed with a nut, The cap portion has a thread that can be screwed onto an opening of a carbon dioxide fixation container containing water and calcium hydroxide, The other end of the pipe portion has an outlet for ejecting air, The carbon dioxide fixation device is characterized in that the nozzle is inserted into the calcium hydroxide solution in the carbon dioxide fixation vessel.

2. 2. The carbon dioxide fixation device according to claim 1, wherein the carbon dioxide fixation device is constantly connected to a pipe in the compressed air pressure circuit.

3. 2. The carbon dioxide fixation device according to claim 1, wherein the carbon dioxide fixation container is a polyethylene container.

4. 2. The carbon dioxide fixation device according to claim 1, wherein the orifice has a diameter of 0.1 mm.

5. 2. The carbon dioxide fixation device according to claim 1, wherein the cross-sectional area of ​​the vent hole is 50 times the cross-sectional area of ​​the orifice.

6. A nozzle portion is provided instead of the pipe portion, one end of the nozzle portion is connected to the joint portion, The nozzle portion branches the air from the joint portion and sends it to two branch pipe portions, The branch pipe has a jet hole on a side surface near the end thereof, The ends of the branch pipe section are bent in directions away from each other, 2. The carbon dioxide fixation device according to claim 1, wherein the nozzle holes of the two branch pipes are provided at positions that stir the liquid in the container in the same direction.

7. A method for immobilizing carbon dioxide in a compressed air pressure circuit, comprising: Equipped with a carbon dioxide fixation device, The carbon dioxide fixation device comprises a joint portion, a cap portion, and a pipe portion, The cap has a joint through-hole in the center of the top surface, and an exhaust vent hole near the edge of the top surface. one of the joint portions is connectable to a tube from the compressed air circuit, and the other is connected to one of the pipe portions; The joint portion comprises an orifice joint and a partition joint, The orifice joint has an orifice for adjusting air pressure, The bulkhead joint is inserted into the joint through-hole of the cap portion and fixed with a nut, The cap portion has a thread that can be screwed onto the opening of a polyethylene container containing water and calcium hydroxide, adding water and calcium hydroxide to the polyethylene container and stirring; inserting the tube portion into an opening of the polyethylene container and screwing the cap portion onto the opening; connecting the tubing from the compressed air circuit to the orifice joint; air from the compressed air pressure circuit is introduced into the polyethylene container, passed through the tubing, and delivered into the mixture of water and calcium hydroxide, whereby calcium carbonate is produced by the carbon dioxide in the air from the compressed air pressure circuit and the calcium hydroxide in the polyethylene container; removing the carbon dioxide fixation device from the polyethylene container and sealing the polyethylene container with a lid; and recovering the polyethylene container.

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