JP7004881B2 - Carbon dioxide capture system - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act April 17, 2018 Hokuto City Hall Sutama General Branch released "CO2 capture device" related to this application.

Application of Article 30, Paragraph 2 of the Patent Act August 8th and 9th, 2018 At the 2018 Super Science High School Student Research Presentation, the "CO2 capture device" related to this application was disclosed.

Application of Article 30, Paragraph 2 of the Patent Law On August 19, 2018, the "CO2 recovery device" related to the present application was released in a program called "Sentenceless Academy 2.0" broadcast by Nippon Television.

Application of Article 30, Paragraph 2 of the Patent Act September 27, 28, 2018 Elementary and junior high schools in Hokuto City, Yamanashi Prefecture (Sutama Elementary School, Takane Higashi Elementary School, Takane Kita Elementary School, Nagasaka Elementary School, Izumi Elementary School, Takane Junior High School, Izumi Junior High School, At Takane Kiyosato Elementary School, Akeno Elementary School, Takekawa Elementary School, Hakushu Elementary School, Kobuchizawa Elementary School, Takane Nishi Elementary School, Nagasaka Junior High School), the "CO2 recovery device" related to this application is disclosed.

Application of Article 30, Paragraph 2 of the Patent Act October 11, 2018 Hokuto City Hall Sutama General Branch released the "CO2 recovery device" related to this application.

The present invention relates to a carbon dioxide capture system and the like.

As one of the measures against global warming, it is necessary to reduce the content of carbon dioxide in the atmosphere. One of the major causes of the increase in the content of carbon dioxide in the atmosphere is that carbon dioxide contained in combustion exhaust gas from power plants and steelworks is released into the atmosphere, resulting in a greenhouse effect. It is believed that

Conventional carbon dioxide recovery techniques for global warming countermeasures include, for example, "carbon dioxide recovery device and carbon dioxide recovery method" disclosed in Patent Document 1. The technique disclosed in Patent Document 1 is
An absorption tower containing an absorbent material is arranged in a transport line of combustion exhaust gas such as a power plant or a steel mill, and the combustion exhaust gas is passed through the absorption tower, and carbon dioxide is adsorbed on the absorbent material at the time of passage. As a result, the combustion exhaust gas having a reduced carbon dioxide content is output from the absorption tower.

Further, the carbon dioxide absorbed by the absorbent material that has absorbed the carbon dioxide is desorbed from the absorbent material by reducing the pressure inside the absorption tower by a vacuum pump, and is released along with the steam. The carbon dioxide released from the absorber accompanying this steam is supplied from the discharge line to the carbon dioxide circulation line and is configured to be recovered in the tank. By desorbing carbon dioxide in this way, the absorbent material is regenerated into a state in which carbon dioxide can be adsorbed again.

Further, in the "CO2 recovery device and CO2 recovery method" disclosed in Patent Document 2, an absorption liquid that absorbs carbon dioxide is filled in the absorption tower, and the absorption liquid is brought into contact with an exhaust gas containing carbon dioxide. Carbon dioxide is dissolved in the absorption liquid and carbon dioxide is removed from the exhaust gas. Then, the absorbing liquid that has absorbed carbon dioxide in the absorbing body is heated by steam to release carbon dioxide from the absorbing liquid, and the released carbon dioxide is recovered.

JP-A-2017-56383 JP 2016-87540

The conventional carbon dioxide recovery system is a large-scale one using a recovery tower. A recovery system using an aqueous solution requires energy for heating and may generate new carbon dioxide when heated.

In addition, the conventional recovery system is a system that suppresses the amount of carbon dioxide emitted from carbon dioxide emission sources such as power plants, and the general public does not realize that such a system is being carried out. It is not possible for ordinary individuals to arouse the need for global warming countermeasures such as carbon dioxide reduction.

The above-mentioned problems are described as independent of each other, and the present invention does not necessarily have to solve all of the described problems, as long as at least one problem can be solved. In addition, we have the intention to acquire the rights to the structure for solving this problem independently by divisional application, amendment, etc.

(1) In order to solve the above-mentioned problems, the carbon dioxide recovery system of the present invention is generated by an electrolysis treatment unit that electrolyzes a sodium chloride aqueous solution to generate a sodium hydroxide aqueous solution, and the electrolysis treatment unit. An absorption treatment unit that supplies the air to the sodium hydroxide aqueous solution and dissolves carbon dioxide in the air into the sodium hydroxide aqueous solution to generate an aqueous solution containing sodium carbonate and sodium hydrogen carbonate, and an absorption treatment thereof. To the aqueous solution containing the sodium carbonate and the sodium hydrogencarbonate produced in the section, the hydrochloric acid generated when the sodium hydroxide aqueous solution is produced in the electrolysis treatment section is supplied, and the sodium carbonate and the carbonic acid are chemically reacted. It is configured to include a take-out processing unit for extracting gaseous carbon dioxide from sodium hydrogen.

In this way, the sodium chloride aqueous solution is electrolyzed in the electrolysis treatment section to produce the required sodium hydroxide aqueous solution, and air is introduced into the produced sodium hydroxide aqueous solution in the absorption treatment section to absorb carbon dioxide. .. The by-product hydrochloric acid produced when the sodium chloride aqueous solution is electrolyzed by the electrolysis treatment is supplied to the aqueous solution containing sodium carbonate and sodium hydrogen carbonate produced by dissolving carbon dioxide. Then, hydrochloric acid reacts with sodium carbonate and sodium hydrogen carbonate to generate carbon dioxide (gas), so that the carbon dioxide (gas) is released from the aqueous solution to the outside and can be separated and recovered. Since carbon dioxide (gas) is taken out and the remaining aqueous solution becomes a sodium chloride aqueous solution, it can be used again for electrolysis in the electrolysis processing unit. In this way, the sodium chloride aqueous solution first supplied to the electrolysis treatment section is treated in each treatment section and finally returned to the sodium chloride aqueous solution, so that the sodium chloride aqueous solution and the aqueous solution produced from the sodium chloride aqueous solution can be used repeatedly. good.

Therefore, the carbon dioxide recovery system of the present invention has a simple structure and can take out and recover carbon dioxide (gas) without using thermal power. As described above, in the present invention, the recovery system using the sodium hydroxide aqueous solution does not require energy for heating as in the prior art, and therefore there is no possibility that new carbon dioxide will be generated by the heating.

(2) The electrolysis treatment unit includes a reaction vessel that is divided into upper and lower parts via a semi-permeable membrane or a cation exchange membrane, a cathode that is divided into upper and lower parts, and a cathode that is arranged in the lower space, and above and below it. A state in which an anode arranged in the divided upper space and an openable / closable drainage path connected to the lower part of the reaction vessel are provided, and the lower space and the upper space are each filled with an aqueous sodium chloride solution. It is preferable that the sodium hydroxide aqueous solution is generated in the space below the anode by energizing between the anode and the cathode, and the generated sodium hydroxide aqueous solution can be discharged via the drainage path. By doing so, it is good that the sodium hydroxide aqueous solution can be generated and discharged by electrolysis with a simple structure.

(3) By opening the semipermeable membrane or the cation exchange membrane in a state where all of the sodium hydroxide aqueous solution in the lower space is discharged, the hydrochloric acid existing in the upper space can be discharged through the drainage route. It is good to configure it so that it can be discharged via. By doing so, hydrochloric acid can be easily discharged, and carbon dioxide (gas) can be taken out in the take-out processing unit, which is good. The opening of the semipermeable membrane or the cation exchange membrane may break the semipermeable membrane or the cation exchange membrane as shown in the embodiment, or may be provided with a valve that opens and closes, but the structure for breaking may be simple. It is good because it can be realized.

(4) The absorption treatment unit may include a container for storing the sodium hydroxide aqueous solution and an air supply means for supplying the air to the sodium hydroxide aqueous solution stored in the container.

(5) The air supply means has one end connected to an air supply device that takes in and discharges the surrounding air and an air discharge portion of the air supply device, and the other end is the stored sodium hydroxide aqueous solution. It is preferable to provide a pipe member to be arranged so as to be immersed in the air. In the embodiment, the air supply machine corresponds to an air pump, an air compressor, an air pump, and the like. Further, the pipe member corresponds to the first pipe member 35 in the embodiment.

(6) It is preferable that the other end of the pipe member has a plurality of notches from the tip end side thereof, and a plurality of strip-shaped portions are arranged in the circumferential direction. In this way, the air discharged from the tip of the tube member is in the state of fine bubbles, so that carbon dioxide in the air dissolves in the sodium hydroxide aqueous solution more efficiently.

Further, as a configuration for efficiently dissolving the carbon dioxide in the air with the sodium hydroxide aqueous solution, the configuration may be changed to the configuration described in (6) above, or in addition to the configuration, the air discharged from the pipe member may be used. It is good to configure it to extend the staying time of foam.

(7) It is preferable to provide a notch portion penetrating inside and outside on the side surface of the pipe member on the other end side. In this way, a part of the air moving in the pipe member is discharged to the outside as bubbles from the cut portion. The air bubbles also rise while moving in the sodium hydroxide aqueous solution, and the carbon dioxide in the air dissolves in the sodium hydroxide aqueous solution during the movement, so that the carbon dioxide in the air is more efficiently sodium hydroxide. It is good because it dissolves in an aqueous solution.

(8) The description of sodium in the carbon dioxide capture system according to any one of (1) to (7) may be replaced with potassium. That is, it is advisable to replace the letters such as sodium chloride → potassium chloride, sodium hydroxide → potassium hydroxide, sodium carbonate → potassium carbonate, sodium hydrogen carbonate → potassium hydrogen carbonate. For example, with respect to (1), the air is supplied to an electrolysis treatment unit that electrolyzes an aqueous potassium chloride solution to generate an aqueous potassium hydroxide solution and the aqueous potassium hydroxide solution produced by the electrolysis treatment unit. An absorption treatment unit that dissolves carbon dioxide in the air into the potassium hydroxide aqueous solution to generate an aqueous solution containing potassium carbonate and potassium hydrogen carbonate, and the potassium carbonate and the potassium hydrogen carbonate produced by the absorption treatment unit are combined. It is provided with a take-out processing unit for supplying hydrochloric acid generated when the potassium hydroxide aqueous solution is produced in the electrolysis treatment unit to the contained aqueous solution and extracting gaseous carbon dioxide from the potassium carbonate and the potassium hydrogen carbonate by a chemical reaction. It is a carbon dioxide recovery system characterized by this. The same applies to (2) to (7).

(9) The absorption processing unit may be composed of a self-propelled domestic robot.
(10) It may be applied to a system that is placed in a home, office, or educational site and recovers carbon dioxide in the surrounding air where the place is placed.

The present invention has a simple structure and can extract and recover carbon dioxide (gas) without using special energy such as thermal power.

It is a figure which shows one preferable embodiment of the carbon dioxide capture system which concerns on this invention. It is a figure which pays attention to each process for recovery. It is a figure explaining the action, the chemical reaction, etc. performed in each device / stage to recover carbon dioxide. It is a figure which shows an example of a reaction vessel. It is a figure which shows the 2nd container for performing a CO2 absorption stage, and the equipment / member connected to it. It is a figure which shows an example of the robot apparatus main body. It is a figure which shows the 3rd container for executing a CO2 take-out stage, and the equipment / member connected to it. It is a figure which shows the other embodiment of the 2nd container for performing a CO2 absorption stage. It is a figure which shows the other embodiment of the 2nd container for performing a CO2 absorption stage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to this and can be modified, modified or improved based on the knowledge of those skilled in the art as long as it does not deviate from the scope of the present invention.

1 to 3 show a preferred embodiment of the carbon dioxide capture system according to the present invention. This embodiment is carried out using sodium chloride or potassium chloride as a starting material. For the sake of brevity, the case of sodium chloride is described, but for the substances appearing later, the letters and chemical formula of sodium may be replaced with potassium as it is. By replacing the letters and chemical formulas of sodium with potassium as it is, it becomes an embodiment or a modification using potassium chloride. Potassium hydroxide has better carbon dioxide absorption performance than sodium hydroxide.

As shown in FIGS. 1 to 3, the carbon dioxide recovery system of the present embodiment generates and supplies an aqueous sodium hydroxide solution and the like, and the sodium hydroxide station 1 and the hydroxide supplied from the sodium hydroxide station 1. The robot device main body 2 is provided with a robot device main body 2 that performs a predetermined process such as absorbing carbon dioxide in the atmosphere using an aqueous sodium solution or the like. The sodium hydroxide station 1 also has a function of releasing carbon dioxide absorbed in the sodium hydroxide aqueous solution on the robot device main body 2 side from the sodium hydroxide aqueous solution and recovering it.

The sodium hydroxide station 1 has a function of electrolyzing an aqueous sodium chloride solution to produce sodium hydroxide, which is an aqueous solution required for the reaction. The specific configuration is as follows. The sodium hydroxide station 1 has, for example, a configuration in which a reaction container 11 opened up and down is arranged on the upper surface of a table-shaped frame 10. The gantry 10 is attached to a frame formed by arranging, for example, an elongated steel material 10a made of iron on each side of a virtual rectangular parallelepiped and connecting both ends of each adjacent steel material 10a, and an upper surface portion of the frame body. It is configured to include a plate material 10b. As a result, the gantry 10 has a predetermined work space K below, and the periphery of the work space K is open.

The reaction vessel 11 has a form such that the bottom of the PET bottle is cut open and the top and bottom are turned upside down. In this example, the body portion 11a has a substantially square cylindrical state, the inner shape of the body portion 11a gradually shrinks below the body portion 11a, and the lower end becomes a cylindrical discharge port 11b. The volume of the reaction vessel 11 may be, for example, about 2 liters.

A rectangular basket member 15 is mounted in the reaction vessel 11. As shown in FIG. 4, for example, the basket member 15 has an open upper surface, metal rods 15a are incorporated in a grid pattern on the bottom surface and four side surfaces, and a wire mesh portion 15b is arranged, and one of the rectangular peripheral edges of the upper surface. It is preferable to adopt a configuration in which a hook portion 15c protruding outward is provided on the opposite side of the set. The rectangular outer dimensional shape of the upper surface may be, for example, one size smaller than the content dimensional shape of the reaction vessel 11, and when the basket member 15 is inserted into the reaction vessel 11 from above the reaction vessel 11. Due to the difference in size and shape, it is housed in the reaction vessel 11, and the hooking portion 15c comes into contact with the upper end peripheral edge of the reaction vessel 11 to prevent further entry. As a result, the basket member 15 is supported in a suspended state by being caught by the upper end peripheral edge of the reaction vessel 11.

The semipermeable membrane 16 is arranged on the inner peripheral surface side of the basket member 15. For this semipermeable membrane 16, for example, a sheet-shaped cellophane film may be used and pressed along the inner peripheral surface of the basket member 15 to form a ball-shaped or deep dish-like shape as a whole, or the semipermeable membrane 16 may be formed into a predetermined shape. The processed material may be set from above the basket member 15. The semipermeable membrane 16 divides the space inside the reaction vessel 11 into two parts, front and back. A cation exchange membrane may be used instead of the semipermeable membrane 16, and if a cation exchange membrane is used, higher purity sodium hydroxide / potassium hydroxide may be obtained. Further, in the following description, an example using the semipermeable membrane 16 will be described, but the portion described as the semipermeable membrane 16 may be replaced with a cation exchange membrane.

Further, the carbon rod 17 is arranged in the upper region divided by the semipermeable membrane 16, and the iron plate 18 is arranged below the lower region divided by the semipermeable membrane 16, more specifically, the basket member 15. .. The carbon rod 17 is connected to the positive electrode terminal of the power supply 20 via the power supply line 19 to form an anode. The iron plate 18 is connected to the negative electrode terminal of the power supply 20 via the power supply line 19 to form a cathode.

Then, as will be described later, at the time of use, the salt solution which is an aqueous solution of sodium chloride is filled in the upper and lower spaces divided into two in the reaction vessel 11, and at least the saline solution filled in the lower space is semipermeable. Make contact with the membrane 16.

The power supply 20 is turned on / off based on the operation of the operation switch, for example, and is energized between the electrodes of the carbon rod 17 and the iron plate 18 when the power supply is turned on. The power source 20 is a DC power source, and for example, a dry cell, a solar cell, or the like may be used, and a solar cell is particularly preferable because it has clean energy. The output voltage of the power supply 20 is appropriately selected depending on the capacity of the aqueous solution to be reacted and the processing time, but is preferably about 6 to 12 V, for example.

Further, in the present embodiment, the carbon rod 17 and the iron plate 18 are used as the components of the anode and the cathode, but the present invention is not limited to this. For example, the material of the electrode plate of the anode is not limited to the carbon rod. Platinum, gold or the like may be used. Further, as the material of the electrode plate of the cathode, not only iron but also carbon rod, magnesium, nickel, copper, silver, platinum, gold and the like may be used. The combination of the carbon rod 17 and the iron plate 18 of the embodiment is good because it is a material that can be obtained relatively easily and inexpensively.

On the other hand, one end of the connecting pipe 13 is connected to the discharge port 11b at the lower end, and one end of the drainage pipe member 14 is attached to the other end of the connecting pipe 13. The connecting pipe 13 is provided with an opening / closing valve 13a in the middle thereof, and the opening / closing valve 13a is opened / closed by operating the operation lever 13b.

It is preferable that the drainage pipe member 14 is made of a material that is elastic and can be curved, such as a rubber pipe, and has good resistance to the aqueous solution discharged from the reaction vessel 11.

The first container 25 is arranged in the space below the gantry 10. The first container 25 is a container having an open upper portion, and when used, the tip portion of the drainage pipe member 14 is arranged in the first container 25. When the opening / closing valve 13a is opened by operating the operating lever 13b, the aqueous solution existing in the region below the reaction vessel 11 is discharged to the outside via the drainage pipe member 14. In the present embodiment, since the tip of the drainage pipe member 14 is located in the first container 25, the aqueous solution collects in the first container 25.

In the present embodiment, the outer shape of the reaction vessel 11 has a tapered lower portion, and it is unstable to stand up as it is. Therefore, for example, the reaction vessel is placed at a predetermined position on the upper surface of the plate material 10b. It is advisable to install a pedestal 12 that holds the 11 in an upright position. Then, by setting the reaction vessel 11 on the pedestal 12, the posture in which the reaction vessel 11 is erected is stably maintained.

Sodium hydroxide station 1 is a device that performs the electrolysis stage in FIG. As described above, when the upper and lower spaces separated by the semipermeable membrane 16 in the reaction vessel 11 are filled with saline solution and electricity is applied between the two electrodes, the following electrolysis occurs and 2NaCl + 2H ₂ O → 2NaOH + Cl ₂ + H ₂
A sodium hydroxide aqueous solution (2NaOH) is generated in the lower space. In the upper space, the following reaction occurs from chlorine, which is a by-product generated during electrolysis, and H ₂ O + Cl ₂ → HCl + HClO.
Hydrochloric acid is generated and accumulates. Therefore, when the on-off valve 13a is opened, the sodium hydroxide aqueous solution generated in the lower space is discharged into the first container 25 and supplied to the first container 25 via the drainage pipe member 14.

The robot device main body 2 includes a second container 32 and an air pump 33 that supplies air to the aqueous solution in the second container 32. The first lid member 34 can be detachably attached to the upper end of the second container 32. The second container 32 is filled with the sodium hydroxide aqueous solution generated in the sodium hydroxide station 1 and filled and supplied into the first container 25. The second container 32 may also be used as the first container 25 used in the sodium hydroxide station 1, or may be composed of a container of another member. In the case of combined use, for example, the first container 25 filled with the sodium hydroxide aqueous solution is moved to the side of the robot device main body 2 and the first lid member 34 is attached. When the first container 25 and the second container 32 are made of different members, for example, the first container 25 filled with the sodium hydroxide aqueous solution is brought close to the robot apparatus main body 2 and the second container 32 is used. After transferring the sodium hydroxide aqueous solution in the first container 25 to the second container 32 with the first lid member 34 open, the first lid member 34 is attached to the second container 32. good.

When the first lid member 34 is attached, the first lid member 34 closes the second container 32 in a state of being in close contact with the upper end edge of the second container 32. The first lid member 34 has through holes 34a and 34b at two places, and the first pipe member 35 connected to the output pipe of the air pump 33 is inserted into one through hole 34a and the other through hole 34b. Inserts the second pipe member 36. As shown in FIG. 5 and the like, the tip of the first pipe member 35 inserted into the second container 32 is in a state of entering the aqueous solution filled in the second container 32, and the tip of the second pipe member is the said. It is located in the space between the water surface of the aqueous solution and the first lid member 34 so as not to come into contact with the aqueous solution. Both the first pipe member 35 and the second pipe member 36 are made of a material that is elastic and can be curved, such as a rubber pipe, and has good resistance to the aqueous solution discharged from the reaction vessel 11. It is good to make it.

In this way, the air pump 33 forcibly supplies the air in the atmosphere into the aqueous solution in the second container 32 via the first pipe member 35. Then, the carbon dioxide contained in the atmosphere reacts with sodium hydroxide as shown below.
2 NaOH + CO ₂ → Na ₂ CO ₃ + H ₂ O
Na ₂ CO 3 + H ₂ O + CO ₂ → 2 NaHCO ₃
It dissolves in the sodium hydroxide aqueous solution in the second container 32, and the aqueous solution in the second container 32 becomes an aqueous solution containing carbon dioxide. This aqueous solution also contains a large amount of sodium carbonate.

Further, since the amount of air in the second container 32 increases due to the forced supply of air by the air pump 33, the air existing in the space between the water surface of the aqueous solution and the first lid member 34 passes through the second pipe member 36. Is discharged to the outside of the second container 32. When the operation of the air pump 33 is continued, carbon dioxide is absorbed by the sodium hydroxide aqueous solution in the air existing in the space, so that the air becomes air in which carbon dioxide is removed or the content is reduced.

As will be described later, the robot device main body 2 includes a movable case main body 50, and the control device 31, the second container 32, the air pump 33, and the like described above are housed in the case main body 50. In such a case, the outer tip of the second container 32 of the second pipe member 36 may be projected to the outside of the case body. When the air is projected to the outside of the case body, the air from which the carbon dioxide is removed or the content is reduced is discarded to the outside of the robot device body 2 via the second pipe member 36, and before the treatment. The carbon dioxide-rich air will be replaced with the treated one. Therefore, by repeatedly executing the above processing, CO2 can be gradually reduced. The case body 50 can be opened and closed, the air pump 33, the second container 32, etc. are usually stored in the case body 50, and the second container 32 is taken out of the case body 50 when used. It is good to do it.

As shown in FIG. 5, the tip of the first pipe member 35 may have a plurality of notches 35a and a plurality of strip-shaped portions 35b arranged in the circumferential direction. By doing so, the air discharged from the tip of the first pipe member 35 becomes a state of fine bubbles, the reaction proceeds more, and more carbon dioxide is dissolved in the sodium hydroxide aqueous solution. Further, as shown in the figure, when the tip of the first pipe member 35 is brought into contact with the inner bottom of the second container 32 or placed near the inner bottom, the air bubbles released from the tip reach the water surface. It is good because the travel distance becomes longer and carbon dioxide dissolves more.

Further, in the present embodiment, a notch portion 35c that penetrates inside and outside is provided on the side surface on the tip end side of the first pipe member 35. The section forming the cut portion 35c is a portion immersed in the sodium hydroxide aqueous solution. Then, as shown in the figure, the portion of the section in which the cut portion 35c is formed is arranged so as to be curved along, for example, the inner peripheral surface of the second container 32. Then, the cut portion 35c is opened to form a slit-shaped gap, and a part of the air moving in the first pipe member 35 is discharged to the outside as bubbles from the cut portion 35c. The air bubbles also rise while moving in the sodium hydroxide aqueous solution, and carbon dioxide in the air dissolves in the sodium hydroxide aqueous solution during the movement. Therefore, it is good that more carbon dioxide can be more efficiently dissolved and recovered in the sodium hydroxide aqueous solution. The process executed inside the second container 32 described above is the CO2 absorption stage. This CO2 absorption stage is mainly realized by the second container 32, the air pump 33, the first pipe member 35, the second pipe member 36, etc. connecting them, and the control of the processing is controlled by a control device as described later. 31 is in charge.

By executing the CO2 absorption stage as described above, carbon dioxide is in a state of being dissolved in the sodium hydroxide aqueous solution in the second container 32. Therefore, the CO2 extraction stage is executed to hydroxylate the dissolved carbon dioxide. Remove from aqueous sodium solution and recover. This CO2 extraction stage is a stage for extracting carbon dioxide dissolved by a chemical reaction as gaseous carbon dioxide, and the CO2 absorption stage is performed using a sodium hydroxide station 1, a third container 37, or the like.

Like the second container 32, the third container 37 is a container with an open top, and the second lid member 38 is detachably attached to the upper opening portion. When the second lid member 38 is attached, the second lid member 38 closes the third container 37 in a state of being in close contact with the upper end edge of the third container 37. Through holes 38a and 38b are also formed in the second lid member 38 at two positions on the top surface thereof. A funnel member 39 is attached to one through hole 38a, and an exhaust pipe member 40 is inserted into the other through hole 38b. The through holes 38a and 38b of the funnel member 39 and the exhaust pipe member 40 and the connecting portions may be sealed and fixed in an airtight state with, for example, an adhesive. When the second lid member 38 is attached to the third container 37, the parts other than the funnel member 39 and the exhaust pipe member 40 are sealed. Further, it is preferable that the tip of the inside of the third container 37 of the funnel member 39 and the exhaust pipe member 40 has a short protrusion amount so as not to come into contact with the water surface of the aqueous solution in the third container 37. The tip of the exhaust pipe member 40 is connected to the space where the carbon dioxide taken out is used.

The CO2 removal stage first transfers the sodium hydroxide aqueous solution in which carbon dioxide stored in the second container 32 is dissolved into the third container 37 via the funnel member 39. At the time of executing the CO2 absorption stage, the second container 32 stores the sodium hydroxide solution, and the first tube member introduces air in the state of being inserted into the sodium hydroxide solution in the previous treatment. Therefore, the sodium hydroxide solution is attached to at least the first tube member 35. Therefore, for example, when the second container 32 filled with the sodium hydroxide aqueous solution in which carbon dioxide is dissolved is used as it is as the third container 37 by removing the first lid member 34 and attaching the second lid member 38. When the first pipe member 35 and the second pipe member 36 together with the first lid member 34 are placed in a room or the like in a state of being completely removed from the second container 32, hydroxylation adhering to the surface of the first pipe member 35 If the sodium solution gets on the floor or touches people, it is dangerous because it is also an alkaline solution. Therefore, the second container 32 and the third container 37 are not shared, and are transferred.

For the same reason, it is preferable to transfer the first lid member 34 without completely removing it from the second container 32, for example. For example, it is preferable to shift the first lid member 34 slightly. When the installation location of the sodium hydroxide station 1 and the robot device main body 2 are separated, for example, at least the first pipe member 35 is kept in the second container 32 together with the first lid member 34. It is good to move near station 1. At this time, for example, the first pipe member 35 and the air pump 33 may be easily attached and detached. If such a configuration is adopted, the robot device main body 2 is placed indoors or the like, and the second container 32 is the first lid. It is advisable to bring the member 34 and each tube member near the sodium hydroxide station 1. If that is not possible, it is advisable to move it together with the robot device main body 2. Alternatively, if the third container 37 is brought near the robot device main body 2 and the sodium hydroxide solution in which carbon dioxide is dissolved is transferred from the second container 32 to the third container 37 near the robot device main body 2. good.

The second lid member 38 is attached to the upper end of the third container 37 filled with the sodium hydroxide aqueous solution in which carbon dioxide is dissolved, and the tip of the drainage pipe member 14 of the sodium hydroxide station 1 is set in the funnel member 39. In this state, for example, the semipermeable membrane 16 receives a hole. Then, the aqueous solution accumulated in the space above the semipermeable membrane 16 moves to the space below the reaction vessel 11 through the hole, and further into the funnel member 39 via the drainage pipe member 14. Discharge. Then, the aqueous solution is guided by the funnel member 39, filled in the third container 37, and mixed with the sodium hydroxide aqueous solution in which carbon dioxide is dissolved.

Then, since the aqueous solution that had stopped in the upper region of the semipermeable membrane 16 contained hydrochloric acid, the reaction shown below occurred in the third container 37.
Na ₂ CO ₃ + HCl → NaHCO ₃ + NaCl
NaHCO ₃ + HCl → NaCl + H ₂ O + CO ₂
Carbon dioxide (gas) is produced. As described above, in the present embodiment, hydrochloric acid, that is, an aqueous solution of hydrogen chloride is used, and carbon dioxide is taken out by neutralizing not only sodium hydrogen carbonate but also sodium carbonate.

Then, the generated carbon dioxide (gas) rises in the aqueous solution, is discharged from the aqueous solution to the outside, and is further discharged to the outside of the third container 37 via the exhaust pipe member 40. Therefore, carbon dioxide (gas) discharged from the tip of the exhaust pipe member 40 can be recovered and used. For recovery, for example, the tip of the exhaust pipe member 40 may be connected to a recovery device or the like for storing carbon dioxide such as a carbon dioxide storage container or a carbon dioxide cylinder so that carbon dioxide can be stored in the recovery device or the like. By doing so, carbon dioxide can be temporarily stored, and the recovery device or the like can be carried to a place where carbon dioxide is used and used beneficially.

Further, the use may be such that it is used as something useful for daily life, and for example, it is good to supply it to the space of the carbon dioxide farm (CO2Farm) 55 as shown in FIG. As shown in FIG. 7, this carbon dioxide farm is a facility for growing plants in a space separated by a vinyl house, a room in a building, and other various board materials, and in the divided space, Supply carbon dioxide. Then, the content of carbon dioxide in the air in the space becomes high, and the plants are cultivated in an atmosphere having a high carbon dioxide concentration, which improves the growth of plants. Further, in the example shown in FIG. 7, the tip of the exhaust pipe member 40 is connected to the carbon dioxide farm so that the carbon dioxide (gas) discharged from the third container 37 is directly supplied to the carbon dioxide farm. As described above, it may be collected once in a recovery device and carbon dioxide may be supplied from the recovery device.

As another form of use, the fish may be placed in an aquarium. Furthermore, it can be converted into a fuel such as methane using a catalyst or the like and used, or an organic substance can be synthesized and used as food or a nutrient source. This technology may be applied, for example, to recover CO2 from the CO2 atmosphere of Mars by exploration of Mars and to produce food from the CO2.

Further, carbon dioxide (gas) is discharged, and the aqueous solution remaining in the third container 37 becomes NaCl + _H2O and becomes a saline solution. Therefore, for the aqueous solution remaining in the third container 37 after recovering carbon dioxide, for example, a new semipermeable membrane 16 having no holes is filled in the reaction container 11 set in the basket member 15, and the electrolysis stage is performed. Use for. In this way, the next stage is executed with the aqueous solution produced by processing in each stage such as "electrolysis stage"->"CO2 absorption stage"->"CO2 extraction stage"->"electrolysisstage"-> .... It is preferable because it can be placed in a container and used as an aqueous solution for use in the next stage, and can be treated endlessly.

By the way, in the present embodiment, the operation of the air pump 33 is managed by the control device 31. As shown in FIG. 1, in addition to the control device 31, the air pump 33, the second container 32, etc., the robot device main body 2 further includes a microphone unit 41, an operation switch 42, a speaker 43, a light emitting unit 44, a display panel 45, and a GPS. It includes a unit 46, a communication interface 47, a solar cell 48, a power supply circuit 49, and the like. These devices / devices are mounted inside or outside the case body 50 as shown in FIG. 6, and can be moved integrally with the case body 50. For example, the air pump 33 and the second container 32 are arranged in the internal space of the case body 50, for example.

In the present embodiment, the robot device main body 2 may be self-propelled, and the wheel portions 52 are arranged at the four corners near the bottom surface of the case main body 50, respectively. It is provided with casters and the like that connect the wheels and the rotation shafts of the wheels to the bottom surface of the case body 50 while supporting the wheels. The case body 50 may have a form such as a suitcase, for example. With a suitcase-like aspect, it is possible to realize a structure in which the case body 50 can be opened and closed and the wheel portion 52 is arranged near the bottom surface as described above.

Further, at least two of the four wheel portions 52 are drive wheel portions, and the wheels rotate forward and reverse under the power from the drive portion mounted on the case main body 50, and the robot device main body 2 moves forward and backward. Further, at least two of the four wheel portions 52 have a steering function of rotating forward and reverse within a predetermined angle range around an axis in the vertical direction to change the direction thereof. The wheel portion having such a function may be used in combination with the drive wheel portion described above, or may be another wheel portion. By making it self-propelled in this way, for example, it is equipped with a function to efficiently generate power by monitoring the amount of power generated by the solar cell 48 and facing the direction of the sun or moving it to an appropriate position in the room. good. In addition, it is preferable to have a function of following the user and to have an effect of demonstrating familiarity and attachment from the user.

In addition, actual suitcases come in various sizes and shapes, but regardless of the size, for example, even if they are placed in a home or office room, they do not get in the way and the installation location can be easily moved. can do. Therefore, the case body 50 of the present embodiment may also be the size of such a suitcase. Further, even when the wheel portion is provided on the bottom surface of the case body 50, it is not always necessary to make it self-propelled as described above, and casters or the like having no drive wheel portion may be mounted. In this way, it becomes easy for people to carry and move without running by themselves, and it is possible to easily respond to changing the installation location.

The solar cell 48 is arranged on the outer surface of the case body 50 in an optically exposed state. Optical exposure means that the solar cell 48 is arranged so as to be able to receive sunlight or the like, and is not necessarily limited to a configuration in which it is directly installed outside. In the present embodiment, a transparent member is used for the exterior portion of the case body 50, and the solar cell 48 is arranged on the back surface side of the transparent member. By arranging the solar cell 48 inside the case body 50 in this way, the solar cell 48 is prevented from being damaged or damaged, and by placing the solar cell 48 in the internal space of the case body 50, wiring becomes easy. good.

The output of the solar cell 48 is given to the power supply circuit 49, generates a voltage having a desired voltage value, and supplies power to each input / output device or the like as a power supply voltage. Further, for example, in order to operate stably even at night, it is preferable that the power supply circuit 49 is provided with a rechargeable battery and a charging circuit, and is provided with a function of supplying power from the rechargeable battery when the amount of power generated by the solar cell 48 is low. ..

The control device 31 is a microcomputer including a CPU, ROM, RAM, non-volatile memory, I / O, etc., and is predetermined based on input signals from the above-mentioned input devices (microphone unit 41, operation switch 42, GPS unit 46, etc.). Is executed to operate and control the output devices (air pump 33, speaker 43, light emitting unit 44, display panel 45, etc.). A plurality of devices such as the control device 31, the speaker 43, and the display panel 45 may be integrally realized and configured by using, for example, the functions of a tablet terminal. When a tablet terminal (tablet) is used, the tablet terminal may be installed on the upper surface of the case body 50.

For control of the air pump 33, which is an example of control, for example, the control device 31 that detects the on of the operation switch 42 turns on the power of the air pump 33 and starts the operation. Along with this, as described above, the air pump 33 operates to supply the air in the atmosphere into the sodium hydroxide aqueous solution filled in the second container 32. The control device 31 determines the amount of carbon dioxide dissolved in the sodium hydroxide aqueous solution in the second container 32. In this embodiment, the amount of carbon dioxide absorbed (for example, the amount absorbed per unit time) with respect to the amount of air supplied in the model case is obtained by conducting an experiment in advance, and the current absorbed carbon dioxide is absorbed based on the elapsed time from the start. Calculate the amount. When the obtained absorption amount exceeds the reference value, the control device 31 stops the operation of the air pump 33. Further, the control device 31 may have a function of notifying that the CO2 absorption stage has been completed in excess of the reference value by using an output device such as a speaker 43, a light emitting unit 44, and a display panel 45.

In the present embodiment, since the solar cell 48 is operated as a power source, the power of the air pump 33 may not be constant and absorption may not be performed in the model case. Therefore, a sensor for determining the amount of carbon dioxide dissolved and the content in the sodium hydroxide aqueous solution is prepared, the sensor is immersed in the sodium hydroxide aqueous solution of the second container 32, and the control device 31 outputs the sensor. It is preferable to calculate the current amount of carbon dioxide absorbed based on the above, and control the operation of the air pump 33 based on the calculation result. As the sensor, for example, if a PH sensor is used, measurement can be performed with a simple configuration. For example, an aqueous solution of sodium hydroxide is alkaline, and when it absorbs carbon dioxide, the concentration of alkalinity decreases. Therefore, it is advisable to obtain the amount of carbon dioxide absorbed from the pH degree with a PH sensor.

Further, the control device 31 is provided with, for example, an artificial function of conversation, and it is preferable that, for example, the voice of the user detected by the microphone unit 41 is subjected to voice recognition processing to understand the meaning and content, and the response to the voice is output from the speaker 43. .. For example, when the user hears "how much carbon dioxide has been absorbed today", the microphone unit 41 picks it up, the control device 31 calculates and obtains the amount of absorption, and the obtained value is answered by voice from the speaker. The calculation of the absorption amount is simply performed by, for example, the operation time × the absorption amount per unit time (model case). Further, it is preferable to obtain the actually measured value based on the history information of the sensor output and notify it, because it can be performed more accurately. Further, for example, when the microphone unit 41 picks up a voice and recognizes the voice, the control device 31 blinks the light emitting unit 44. This is good because it can notify that the user's inquiry is recognized and processed.

The communication interface 47 is an interface for connecting to the Internet, for example, and transmitting / receiving information. The control device 31 has a function of connecting to the Internet using the communication interface 47 and accessing an external server. The control device 31 sends, for example, an operating status such as the amount of carbon dioxide absorbed today to the server. Further, when the control device 31 sends the amount of carbon dioxide absorbed, it is preferable that the control device 31 also sends the current position information obtained by the GPS unit 46.

In this way, a large number of carbon dioxide capture systems of the present embodiment will be provided and arranged nationwide. Then, the amount of carbon dioxide absorbed and recovered by the large number of carbon dioxide recovery systems is collected in the server. The server publishes the carbon dioxide recovery status on a special site based on the aggregated information, for example. For example, the server displays map information such as a map of Japan and a map of the world, and also displays an icon or the like at the corresponding location of the map information to be displayed based on the location information in which each acquired carbon dioxide recovery system is installed. Display the amount of absorption and recovery for each carbon dioxide recovery system so that it can be understood. By doing so, it is good that each individual can be made aware that they are collecting carbon dioxide together, have a sense of unity, and be made aware of global warming countermeasures.

As described above, the carbon dioxide recovery system of the present embodiment is configured as a separate device from the sodium hydroxide station 1 that performs electrolysis and the robot device main body 2 that mounts each processing device including the electric system. Both can be placed apart. Since the sodium hydroxide station 1 uses water, it is good because the water can be prevented from being caught in the electric system of the robot apparatus main body 2 and causing a failure or the like. Further, in the sodium hydroxide station 1, hydrochloric acid and hydrogen are generated by electrolysis, so it is better to perform it outdoors, and the electrolysis stage is set up separately from the robot device main body 2 which is preferably arranged indoors. It is also preferable because it can be done outdoors. Therefore, an apparatus for carrying out each stage of the electrolysis stage, the CO2 absorption stage, and the CO2 extraction stage may be integrally configured, but for the above-mentioned reason, at least the sodium hydroxide station 1 (electrolysis) as in the present embodiment may be configured. It is more preferable to configure the stage (implementing the stage and the CO2 extraction stage) and the robot apparatus main body 2 (implementing the CO2 absorption stage) as different external values.

In the above-described embodiment, a cellophane membrane is used for the semipermeable membrane 16 so that the semipermeable membrane 16 is broken to discharge hydrochloric acid and supply it to the third vessel 37 when the CO2 extraction stage is carried out. For example, a valve may be provided in a part of the semipermeable membrane, and the valve may be opened and closed to discharge hydrochloric acid. Further, for example, the size of the reaction vessel 11 may be increased and the portion of the basket member 15 may be tilted so that hydrochloric acid can be discharged from the upper end edge side of the semipermeable membrane 16. When these configurations are adopted, the semipermeable membrane 16 is not broken, so that it can be used repeatedly. On the other hand, in the present embodiment in which the semipermeable membrane 16 is broken, the configuration is simplified, which is good.

In the above-described embodiment, the air is supplied into the sodium hydroxide aqueous solution by using an air pump, but the present invention is not limited to this, and for example, an air compressor or the like is used to force the air more strongly. It is good to supply it in an aqueous solution of sodium hydroxide. In addition, it is not limited to the one that forcibly supplies air by electric power like these, for example, by using an air pump for a bicycle, etc., air is manually supplied into the sodium hydroxide aqueous solution to supply carbon dioxide. The reduced / removed air may be discharged to the outside of the second container 32 via the second pipe member 36. By doing so, a simpler and cheaper carbon dioxide recovery system can be configured.

It is preferable to mount a CO2 concentration sensor that measures the carbon dioxide concentration on the robot device main body 2. In this embodiment, this CO2 concentration sensor measures and displays the amount of carbon dioxide contained in the air in ppm units. By doing so, for example, the CO2 concentration is constantly monitored, the robot device main body 2 appropriately self-propells and patrols in the room, and when it goes around, the place where the CO2 concentration is the highest is grasped and the place is grasped. It is advisable to move to a location and perform a CO2 capture stage there. This is good because the recovery efficiency can be improved. For example, the CO2 concentration of the outside air is about 400 ppm, but in some rooms, it easily exceeds 1000 ppm. Therefore, in such a case, it is preferable because the recovery efficiency can be increased by three times by simple calculation.

Furthermore, the control device 31 collates, for example, the current position information acquired from the GPS unit 46 with the weather forecast information acquired from the Internet connected via the communication interface 47, and when it is sunny, it runs by itself by the window. It is preferable to have a function of recovering CO2 in a place where the CO2 concentration detected by the above-mentioned CO2 sensor is the highest when the weather is bad or at night. Further, if an optical sensor or the like is attached to the main body of the robot device, the robot device can recognize sunlight or the like and move to, for example, near a window of a building by a motor to charge itself.

In the above-described embodiment, the operation control of the air pump 33 is performed by the control device 31, and the air pump 33 is automatically stopped when a predetermined amount of carbon dioxide can be absorbed, but the present invention is not limited to this. The air pump 33 may be stopped after a time set by a timer, for example, without using a device for control. Further, a switch for the air pump 33 may be provided so that the user can manually operate the switch. Based on this, the operation of the air pump 33 may be started / stopped. When the latter manual operation is used, it is preferable in that the configuration becomes simpler, but it is better to control the control device 31 based on the amount of carbon dioxide absorbed as in the above-described embodiment, and the carbon dioxide is absorbed without excess or deficiency. It is more preferable because the operation can be stopped at that point and the air pump is not unnecessarily continued to operate.

In the above-described embodiment, an example using a saline solution that can be easily prepared at home as an aqueous solution of sodium chloride has been described, but the present invention is not limited to this, and for example, salt content such as seawater, urine, and sweat can be used. An aqueous solution containing the aqueous solution may be used, but a saline solution is preferable because the required amount can be easily obtained in each household. It is also good to use seawater even in an environment where seawater can be easily obtained, such as near the beach.

In the above-described embodiment, each stage uses one container, and each stage is described and described as a representative of one stage, but a plurality of predetermined stages may be provided. For example, the CO2 absorption stages, which take a relatively long processing time of about 1 to 2 days, may be connected in parallel by connecting a plurality of CO2 absorption stages.

In the above-described embodiment, air is supplied while the second container 32 is out of the case body 50 of the robot device body 2, and carbon dioxide is dissolved in the sodium hydroxide aqueous solution. The present invention is not limited to this, and air may be supplied while the second container 32 is housed in the case body 50. In particular, when the robot device main body 2 is self-propelled and works in different places during the day and at night as in the above-mentioned modification, it is preferable that the robot device main body 2 can operate continuously when it is stored. When the second container 32 is stored in the case body 50, a mechanism for fixing the second container 32 is provided so that the case body 50 does not fall over or the sodium hydroxide aqueous solution that moves and stores inside does not spill. Is good. The mechanism for fixing the second container 32 is, for example, a simple configuration in which a rubber string is used, the rubber string is attached in a state of being tightened to the second container 32, and a part of the rubber string is attached to the case body 50. realizable.

Regarding electrolysis, an experiment was conducted with a 1 mol / L saline solution (about 5% saline solution). When a 9 V power source was used and the capacity was 1 L, a 1 mol / L sodium hydroxide aqueous solution was used. It took about 20 hours to get it.

Further, it was confirmed that when the pH of the aqueous solution was 4 or more, chlorine was not generated at all when the electrolysis was performed, and when the pH of the aqueous solution was lower than 4, chlorine was rapidly generated. This phenomenon is caused by (1) elemental chlorine gas (Cl2) (when pH is 4 or less), (2) molecular hypochlorous acid (HOCl) (pH is about 3 to 6), in an aqueous solution. (3) It can be inferred that this is due to the hypochlorite ion (OCLL-) (pH 6 or higher) and the change in shape depending on the pH.

Therefore, for example, it is preferable to attach a pH meter to the sodium hydroxide station 1 in the above-described embodiment, measure the pH with the pH meter, and have a function of automatically or manually stopping the electrolysis before the pH falls below 4. .. By doing so, chlorine gas is not generated at all, so that it is safe. On the other hand, since the sodium hydroxide aqueous solution to be produced becomes thin, it affects the amount of CO2 that can be finally recovered. Therefore, it is advisable to appropriately set a criterion for stopping.

Further, as described above, "not generating chlorine gas at all" and "generating a concentrated sodium hydroxide aqueous solution" are contradictory problems, but by adopting the following embodiment, both problems are solved. Can be solved at the same time (does not generate chlorine gas and produces concentrated NaOHaq.).

That is, the sodium hydroxide station 1 which is an electrolysis processing unit is premised on an embodiment having, for example, the above-mentioned pH meter and a function of controlling the pH of an aqueous solution during electrolysis, for example, before the pH drops below 4. By stopping the electrolysis automatically or manually, a low-concentration aqueous solution of sodium hydroxide is produced without generating chlorine gas. Then, the step of evaporating the water content of the generated sodium hydroxide aqueous solution to concentrate the concentration of the sodium hydroxide aqueous solution is executed. In this concentration step, for example, heating or other predetermined treatment may be performed to accelerate evaporation, but in this embodiment, a step of leaving the product for a predetermined period and spontaneously evaporating is used. By doing so, it is good that the problem of CO2 emission due to new power consumption does not occur by performing a special treatment. In addition, as a result of experiments and verifications, it was confirmed that two days after the start of operation of the sodium hydroxide station 1, the 400 mL aqueous solution became 100 mL and decreased to 1/4. The evaporated 300 mL is water, and the concentration of the sodium hydroxide aqueous solution is concentrated accordingly.

Then, to the concentrated sodium hydroxide aqueous solution produced by executing the relevant treatment (here, the neglected treatment), a newly generated sodium hydroxide aqueous solution is applied while controlling the pH at the sodium hydroxide station 1. Add. By repeating the leaving treatment and the replenishing treatment a predetermined number of times, a high-concentration sodium hydroxide aqueous solution can be produced without generating chlorine gas. By sequentially executing the next step and subsequent steps using the high-concentration sodium hydroxide aqueous solution thus produced, the amount of CO2 absorbed can be sufficiently increased.

The start timing of the process for producing a new sodium hydroxide aqueous solution for the next addition after performing the predetermined process for concentration is, for example, already generated by the predetermined process (here, the neglected process). The user may decide by visually confirming that the volume of sodium hydroxide has decreased by an appropriate amount, but the volume is monitored and the leaving time is measured, and the starting timing is left unattended. It is good to provide a function to do.

In the above-described embodiment, the first pipe member 35 is inserted inside the second container 32, the tip thereof is arranged near the bottom of the second container 32, and the air discharged from the tip or the like becomes bubbles. It was configured to move upward inside the sodium hydroxide aqueous solution filled in the second container 32, and CO2 in the air dissolves in the aqueous solution during the upward movement. Then, in order to increase the amount of CO2 in the air released from the first pipe member 35 dissolved in the aqueous solution, it is preferable to lengthen the residence time of the bubbles in the aqueous solution.

As a configuration for lengthening the residence time of bubbles in the aqueous solution, for example, as shown in FIG. 8, it is preferable to arrange a partition member 55 that blocks the path of bubbles moving upward in the aqueous solution of the second container 32. In the present embodiment, the partition member 55 has a shape in which a part of an arc portion of a circular flat plate is cut off (see FIG. 8 (b) and the like). As a result, when the bubbles that move upward come into contact with the partition member 55 located above, the bubbles are prevented from moving upward as they are, and move so as to bypass the partition member 55, so that the staying time of the bubbles becomes long. Further, when a plurality of partition members 55 are installed as shown in FIG. 8A, it is preferable to arrange them so as to overlap each other in the vertical direction and to arrange the excised portions alternately so as to be located on opposite sides. In this way, the air bubbles discharged from the first pipe member 35 move ascending while meandering, for example, as shown by the arrow in FIG. 8 (c), so that the air bubbles stay in the aqueous solution for a longer period of time. It is good because it can be done. The number of partition members 55 to be installed is arbitrary, and one may be used, but it is preferable to provide many partition members 55 because the staying time can be extended.

Further, as a configuration for lengthening the staying time, for example, as shown in FIG. 9, it is preferable to arrange the mesh-shaped disk 56 at a predetermined position in the second container 32. The number of discs 56 to be installed is also arbitrary. The size of the mesh stitch should be slightly smaller than the size of the foam. This is good because it takes time for the bubbles to pass between the meshes and the carbon dioxide capture amount increases.

The robot device main body 2 of the above-described embodiment may incorporate artificial intelligence into the control device 31 so that it can be used as a domestic robot. When used as such a domestic robot, it is preferable to display a pattern imitating a face on the display panel 45 because it is familiar and attached. Further, since the display panel 45 consumes a large amount of power, it may be hidden at all times or may be configured not to be provided. good. In this way, it is good because it is familiar, and if it is configured without a display unit, it is more preferable because it becomes a communication robot using artificial intelligence at a lower price.

Each of the above-described embodiments and modifications may be configured by appropriately combining some of the configurations. Further, the carbon dioxide recovery system according to the present invention has a simple and compact configuration. For example, it can be placed in each home or office to recover carbon dioxide in each home or office, or in chemistry or in an educational setting. It is good to use it for teaching materials of the information department and others.

For example, in each home, for example, a process of recovering carbon dioxide in the air in the room of the home is performed. Then, the residents of each household can see the operating status of this system in front of them and feel the need for global warming countermeasures such as reduction of carbon dioxide. Furthermore, it can be expected to be an opportunity to take measures against global warming, not limited to this recovery system.

In addition, for example, if it is installed in each room of an office and a process of recovering carbon dioxide in the air in the room is performed, a person who is engaged in work in the room of the office or a person who visits the room may visit the room. You can see the operating status of this system in front of you and feel the need for global warming countermeasures such as carbon dioxide reduction. Furthermore, it can be expected to be an opportunity to take measures against global warming, not limited to this recovery system. In addition, when it is installed in an office, it is good because it has a secondary effect that the company / business operator of the installed office can appeal that it is actively taking measures against global warming.

Furthermore, for example, if it is installed in both a home and an office, it can be said that it is a more preferable environment, but even if it is installed in one place, people related to the place where it is installed go to the other place. It is good because I feel the need for global warming countermeasures and can expect to take countermeasures.

In addition, when installed in an educational setting, it is possible to feel the need for global warming countermeasures while teaching the principle of recovering carbon dioxide in the air.

For example, if a person stays in a narrow and closed space for a long time, such as a conference room, which is an example of an office, the carbon dioxide concentration in the room will increase, causing health problems such as drowsiness and headache. By operating it, it can be mitigated. In addition, since this device has an air supply device housed inside the main body, it is excellent in quietness and does not interfere with human activities due to sound.

Although various aspects of the present invention have been described above with reference to embodiments and modifications, these embodiments and explanations have not been made for the purpose of limiting the scope of the present invention, and are intended for understanding the present invention. It should be added that it was provided to contribute. The scope of the invention is not limited to the configurations and manufacturing methods expressly described herein, but also includes combinations of various aspects of the invention disclosed herein. Of the present invention, the configuration for which a patent is sought is specified in the appended claims, but even if the configuration is not currently specified in the claims, it is disclosed in the present specification. I would like to mention that there is a possibility of claiming a patent for this configuration in the future.

1: Sodium hydroxide station 2: Robot device body 11: Reaction container 12: Pedestal 13: Connecting pipe 14: Drainage pipe member 15: Basket member 16: Semi-transparent film 17: Carbon rod 18: Iron plate 19: Power supply line 20 : Power supply 25: First container 31: Control device 32: Second container 33: Air pump 34: First lid member 35: First pipe member 35a: Notch 35b: Strip-shaped portion 35c: Notch 36: Second pipe member 37 : Third container 38: Second lid member 39: Rohto member 40: Exhaust pipe member 48: Solar cell 49: Power supply circuit 50: Case body

Claims (9)

It is a system that is placed in homes, offices, and educational sites and recovers carbon dioxide in the surrounding air where it is placed.
An electrolysis treatment unit that electrolyzes an aqueous solution of sodium chloride to generate an aqueous solution of sodium hydroxide,
The air is supplied to the sodium hydroxide aqueous solution generated in the electrolysis treatment unit, and carbon dioxide in the air is dissolved in the sodium hydroxide aqueous solution to generate an aqueous solution containing sodium carbonate and sodium hydrogen carbonate. Absorption processing unit and
The aqueous solution containing the sodium carbonate and the sodium hydrogen carbonate produced in the absorption treatment unit is supplied with hydrochloric acid generated when the sodium hydroxide aqueous solution is produced in the electrolysis treatment unit, and the sodium carbonate is chemically reacted. A carbon dioxide recovery system comprising a take-out processing unit for extracting gaseous carbon dioxide from the sodium hydrogen carbonate. The electrolysis treatment unit includes a reaction vessel that is vertically divided via a semipermeable membrane or a cation exchange membrane.
The cathode placed in the space below it is divided into upper and lower parts,
An anode placed in the upper space divided above and below,
It has an openable and closable drainage channel connected to the bottom of the reaction vessel.
By energizing between the anode and the cathode in a state where each of the lower space and the upper space is filled with the sodium chloride aqueous solution, the sodium hydroxide aqueous solution is generated in the lower space, and the generated hydroxide is generated. The carbon dioxide recovery system according to claim 1, wherein the sodium aqueous solution can be discharged via the drainage route. By opening the semipermeable membrane or the cation exchange membrane in a state where all of the sodium hydroxide aqueous solution in the lower space is discharged, the hydrochloric acid existing in the upper space is discharged via the drainage path. The carbon dioxide recovery system according to claim 2, wherein the carbon dioxide recovery system is configured to be possible. The absorption treatment unit includes a container for storing the sodium hydroxide aqueous solution and a container.
The carbon dioxide recovery system according to any one of claims 1 to 3, further comprising an air supply means for supplying the air to the sodium hydroxide aqueous solution stored in the container. The air supply means is
An air supply device that takes in and discharges the surrounding air,
The carbon dioxide according to claim 4, wherein one end is connected to an air discharge portion of the air supply device, and the other end is provided with a pipe member arranged so as to be immersed in the stored sodium hydroxide aqueous solution. Recovery system. The carbon dioxide recovery according to claim 5, wherein the other end of the tube member has a plurality of notches from the tip end side thereof, and a plurality of strip-shaped portions are arranged in the circumferential direction. system. The carbon dioxide recovery system according to claim 5 or 6, wherein a notch portion penetrating inside and outside is provided on the side surface of the pipe member on the other end side. A carbon dioxide recovery system according to any one of claims 1 to 7, wherein the description of sodium in the carbon dioxide recovery system is replaced with potassium. The carbon dioxide recovery system according to any one of claims 1 to 8, wherein the absorption processing unit is composed of a self-propelled domestic robot.

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