Carbon dioxide capture treatment system and CO2 negative emission factory

Abstract

Provided is a carbon-dioxide capture and treatment system comprising: a concentrated-carbon-dioxide mixed gas generating device that has a separation membrane and that generates a concentrated-carbon-dioxide mixed gas by increasing the carbon dioxide concentration in a mixed gas that has been taken thereinto; a carbon-dioxide converting device that converts carbon dioxide in the concentrated mixed gas received from the concentrated-carbon-dioxide mixed gas generating device into a chemically stable compound; a final treatment device that includes an adsorbent and that separates the carbon dioxide from other gaseous components as a result of the adsorbent adsorbing the carbon dioxide; and a carbon-dioxide direct capturing device that takes thereinto the air contained in the surrounding environment and that supplies the air to the carbon-dioxide capture and treatment system at the final treatment device or farther upstream therefrom. With the carbon-dioxide capture and treatment system, carbon dioxide generated in a plant is entirely treated in the plant without externally exhausting the carbon dioxide from the plant and, in addition, the air contained in the surrounding environment is taken thereinto to be subjected to the same treatment as that to which the exhaust gas generated in the plant is subjected; therefore, it is possible to achieve a negative value in terms of the external carbon dioxide emission from the plant.

Description

Technical Field

[0001] The present invention relates to a negative emission factory and a carbon dioxide capture treatment system that can be advantageously used in the factory. In particular, the present invention relates to a negative emission factory that can make the emission of carbon dioxide from the factory to the outside a negative value in a factory equipped with a plant that generates exhaust gas containing carbon dioxide during operation.

Background Art

[0002] For example, in thermal power plants and other plants that use fossil fuels as an energy source, a large amount of carbon dioxide, which is an acidic gas that causes global warming, is emitted during their operation, and this is regarded as a problem as an environmental pollution source. Conventionally, various technologies have been developed to address the problem of carbon dioxide emissions, which are this acidic gas. As one of them, a technology that takes in air in the environment, separates carbon dioxide from the taken-in air, and returns only the carbon dioxide-free gas to the atmosphere has attracted attention as a carbon dioxide direct capture (DAC) technology.

[0003] In this DAC technology, an adsorption / desorption material that adsorbs carbon dioxide under adsorption conditions and desorbs the adsorbed carbon dioxide under desorption conditions is used. Materials that are considered usable for this purpose include, for example, the amine epoxy-based polymer described in Japanese Patent Application Laid-Open No. 2017-047412 (Patent Document 1) and the polyethyleneimine described in US Patent No. 8557027 (Patent Document 2).

[0004] Technological development for the disposal or effective utilization of carbon dioxide separated from air by DAC technology is also underway. For example, the "Regarding Carbon Recycling" (Non-Patent Document 1) issued by the Carbon Recycling Office, Chief Cabinet Secretariat, Ministry of Economy, Trade and Industry on April 11, 2019, describes a concept of recovering and reusing carbon dioxide contained in factory exhaust gas. Non-Patent Document 1 further describes aiming for negative emissions by DAC technology. However, Non-Patent Document 1 provides no teaching on the means for achieving the objective of how to realize negative emissions by any technical means.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Non-Patent Documents

[0006]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Under the background as described above, the main problem to be solved by the present invention is to establish a technology for a negative emission factory that can make the carbon dioxide emissions from a factory to the outside negative. Here, "making the carbon dioxide emissions negative" means not only completely eliminating the emissions of carbon dioxide generated in the factory to the outside of the factory, but also taking in the carbon dioxide contained in the air around the factory so as not to be discharged outside the factory, so that the amount of carbon dioxide emissions to the outside of the factory becomes negative when viewed from the whole factory.

Means for Solving the Problems

[0008] In one aspect, the present invention provides a CO2 negative emission plant including a plant that generates exhaust gas containing carbon dioxide during operation and a carbon dioxide capture treatment system. This In the CO2 negative emission plant, the carbon dioxide capture treatment system consists of a carbon dioxide enriched mixed gas generation device, a carbon dioxide conversion device, a final treatment device, and a carbon dioxide direct capture device. The carbon dioxide enriched mixed gas generation device includes an introduction part that takes in a mixed gas containing carbon dioxide, at least including the exhaust gas of the plant, a separation membrane that can increase the carbon dioxide concentration in the mixed gas to generate a carbon dioxide enriched mixed gas, a concentrated mixed gas discharge part that discharges the carbon dioxide enriched mixed gas, and a residual mixed gas discharge part that discharges a residual mixed gas containing low-concentration carbon dioxide remaining after the carbon dioxide enriched mixed gas is generated.

[0009] The carbon dioxide conversion device is connected to the concentrated mixed gas discharge part of the concentrated mixed gas generation device so as to receive the concentrated mixed gas from the carbon dioxide enriched mixed gas generation device, chemically converts the carbon dioxide in the received concentrated mixed gas into a chemically stable compound, and discharges the final residual gas remaining after the conversion from the discharge part.

[0010] The final treatment device includes an adsorbent that separates carbon dioxide by adsorbing it from other gas components, receives the final residual gas from the discharge part of the carbon dioxide conversion device, adsorbs the residual carbon dioxide in the final residual gas received from the conversion device by the adsorbent, and discharges a gas substantially free of carbon dioxide.

[0011] The carbon dioxide direct capture device takes in the air contained in the surrounding environment and supplies it to the final treatment device of the carbon dioxide capture treatment system or upstream thereof.

[0012]

[0013] ​According to the aspect of the present invention having the above configuration, since the carbon dioxide capture treatment system includes a carbon dioxide enriched mixed gas generation device, a carbon dioxide conversion device, and a final treatment device, all of the carbon dioxide generated in the factory is treated within the factory and is not discharged outside the factory. In addition, since the carbon dioxide direct capture device takes in the air contained in the surrounding environment and performs the same treatment as the exhaust gas in the factory, negative emissions are achieved.

[0014] In the above aspect of the present invention, the enriched mixed gas discharge part can be configured to be in a depressurized state, and the exhaust from the plant can be introduced into the introduction part of the carbon dioxide enriched mixed gas generation device in the carbon dioxide capture treatment system. Further, the separation membrane of the carbon dioxide enriched mixed gas generation device can be composed of a plurality of separation membranes connected in series. The final residual gas from the discharge part of the carbon dioxide conversion device can be configured to be transferred to the final treatment device via the carbon dioxide enriched mixed gas generation device.

[0015] Furthermore, the carbon dioxide direct capture device can be arranged to circulate the taken-in air contained in the surrounding environment through the final treatment device of the carbon dioxide capture treatment system. The exhaust gas containing carbon dioxide generated in the plant preferably has a carbon dioxide concentration of 1.5 wt% or more.

[0016] The final treatment device preferably has a configuration including a recovery container, and it is preferable to recover the carbon dioxide adsorbed by the adsorbent into the recovery container under heating and / or reduced pressure conditions. When heating is performed during the recovery, it is preferable to be equipped with a facility that utilizes the exhaust heat from the product manufacturing plant for the heating during the recovery. The carbon dioxide conversion device preferably has a configuration that converts the carbon dioxide in the received enriched mixed gas into a carbonate such as calcium carbonate and discharges the residual mixed gas from the discharge part. The carbon dioxide capture treatment system can be configured to be driven by natural energy.

[0017] In another aspect of the present invention, a carbon dioxide capture processing system for capturing carbon dioxide is provided. This carbon dioxide capture processing system includes a carbon dioxide concentrated mixed gas generation device, a carbon dioxide conversion device, a final processing device, and a carbon dioxide direct capture device.

[0018] The carbon dioxide concentrated mixed gas generation device includes an introduction part for taking in a mixed gas containing carbon dioxide, a separation membrane capable of increasing the carbon dioxide concentration in the mixed gas to generate a carbon dioxide concentrated mixed gas, a concentrated mixed gas discharge part for discharging the carbon dioxide concentrated mixed gas, and a residual mixed gas discharge part for discharging a residual mixed gas containing low-concentration carbon dioxide remaining after the carbon dioxide concentrated mixed gas is generated.

[0019] The carbon dioxide conversion device is connected to the concentrated mixed gas discharge part of the concentrated mixed gas generation device so as to receive the concentrated mixed gas from the carbon dioxide concentrated mixed gas generation device, chemically converts the carbon dioxide in the received concentrated mixed gas into a chemically stable compound, and discharges the final residual gas remaining after the conversion from the discharge part.

[0020] The final processing device includes an adsorbent for adsorbing carbon dioxide to separate the carbon dioxide from other gas components, receives the final residual gas from the carbon dioxide conversion device, adsorbs the residual carbon dioxide in the final residual gas received from the conversion device with the adsorbent, and discharges a gas substantially free of carbon dioxide.

[0021] The carbon dioxide direct capture device takes in the air contained in the surrounding environment and supplies it to the final processing device of the carbon dioxide capture processing system or upstream thereof.

[0022] Furthermore, in this carbon dioxide capture processing system, the final residual gas from the discharge part of the carbon dioxide conversion device can be configured to be transferred to the final processing device via the carbon dioxide concentrated mixed gas generation device.

[0023] In yet another aspect of the present invention, a CO2 negative emission factory is a plant Exhaust gas collection and separation equipment that collects exhaust gas from [source not specified] and separates carbon dioxide from other exhaust gas components to produce a carbon dioxide-containing gas, and a conversion facility that receives the carbon dioxide-containing gas formed in the exhaust gas collection and separation equipment from the exhaust gas collection and separation equipment and chemically converts the carbon dioxide contained in the carbon dioxide-containing gas into a hydrogen-containing compound that is chemically stable, and a hydrogen production facility that receives the hydrogen-containing compound produced by the conversion facility from the conversion facility and decomposes it to produce hydrogen. Further provided is a first power generation facility that generates electric power using this hydrogen as an energy source and supplies the generated electric power to the plant, and a second power generation facility that generates electric power using natural energy and supplies the generated electric power to the above plant.

[0024] Here, the exhaust gas collection and separation equipment can be configured to include a concentration facility using a separation membrane. In this case, the exhaust gas collection and separation equipment includes a plurality of separation membranes, and a part of the plurality of separation membranes constitutes the above-described concentration facility, and the remaining separation membranes can constitute a residual carbon dioxide separation facility that separates residual carbon dioxide remaining in the residual gas after the production of the carbon dioxide-containing gas in the concentration facility from other exhaust gas components.

[0025] The CO2 negative emission factory can also be configured to further include a plant factory. In this case, at least a part of the carbon dioxide-containing gas from the exhaust gas collection and separation equipment can be supplied to the plant factory. It is possible, and in this case, at least a part of the carbon dioxide-containing gas from the exhaust gas collection and separation equipment can be supplied to the plant factory.

Advantages of the Invention

[0026] The present invention provides a CO2 negative emission factory and a carbon dioxide capture treatment system having the above-described configuration. According to the present invention, not only is the discharge of carbon dioxide generated in the factory to the outside of the factory completely eliminated, but also carbon dioxide contained in the air around the factory is taken in so as not to be discharged to the outside of the factory. Thus, when viewed from the entire factory, the amount of carbon dioxide discharged to the outside of the factory can be made negative.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

[0028] FIG. 1 shows an overall view of a CO2 negative emission factory according to an embodiment of the present invention. Therefore, the CO2 negative emission factory 100 according to this embodiment has a The factory 100 includes a product manufacturing plant, specifically, as an example, a tape manufacturing plant 10. Adjacent to the plant 10, an exhaust gas collection and treatment building 20 is provided, into which exhaust gas discharged from the plant 10 is introduced. The factory 100 further includes a direct air capture device 30 that takes in air contained in the surrounding environment of the factory 100 and sends the air to the exhaust gas collection and treatment building 20 for treatment. The direct air capture device 30 is generally called a DAC (Direct Air Capture) device.

[0029] In the factory 100, a power generation building as the first power generation facility 40 that generates electricity using energy obtained from substances generated in the exhaust gas collection and treatment building 20 is provided adjacent to the exhaust gas collection and treatment building 20, as will be described in detail later. Further, although optional, for example, a solar power generation facility such as a solar panel 51, or a power generation facility using biomass fuel as an energy source can be provided as the second power generation facility 50. The factory 100 can further include a plant 60 in order to utilize the waste heat of the factory 100 and effectively utilize the carbon dioxide collected and / or treated within the factory 100.

[0030] FIG. 2 is a system diagram of a carbon dioxide capture treatment system according to an embodiment of the present invention. In FIG. 2, the entire carbon dioxide capture treatment system is indicated by reference numeral 70, and this system 70 includes a carbon dioxide concentrated mixed gas generation device 71, a carbon dioxide conversion device 72, and a final treatment device 73.

[0031] The carbon dioxide concentrated mixed gas generation device 71 includes a first-stage CO2 separation membrane module 711 and a second-stage CO2 separation membrane module 712. The separation membrane module 711 has an inlet 7 11a connected to an exhaust gas collection pipe facility (not shown) that collects the exhaust gas of the plant 10. The separation membrane module 711 has a CO2 separation membrane 711b that allows carbon dioxide molecules contained in the exhaust gas to permeate and blocks the permeation of other substances. The first-stage concentrated gas containing carbon dioxide at a high concentration that has permeated through the separation membrane 711b is discharged outside the separation membrane module 711 from the outlet 711c. The first-stage residual gas with a low carbon dioxide concentration containing substances that could not permeate through the separation membrane 711b is discharged outside the separation membrane module 711 from the outlet 711d. The separation membrane mod ule 712 has the same configuration as the separation membrane module 711, and has a separation membrane 712b, an inlet 712a provided on one side of the separation membrane 712b, and an outlet 712c provided on the other side of the separation membrane 712b.

[0032] ​The outlet 711c of the first-stage CO2 separation membrane module 711 and the inlet 712a of the second-stage CO2 separation membrane module 712 are connected to each other via a suction pump 72 that generates a flow from the first-stage CO2 separation membrane module 711 towards the second-stage CO2 separation membrane module 712. The outlet 712c of the second-stage CO2 separation membrane module 712 is connected to a mixed gas buffer tank 74 arranged at the CO2-enriched mixed gas discharge part of the CO2-enriched mixed gas generation device 71 via a suction pump 73 similar to the suction pump 72. The outlet 711d of the separation membrane module 711 is connected to a tank 90. The outlet 712d of the separation membrane module 712 is connected to the inlet 711a of the separation membrane module 711. In this way, the CO2-enriched mixed gas generation device 71 according to this embodiment includes CO2 separation membranes connected in multiple stages in series with each other, and the carbon dioxide contained in the plant exhaust gas is highly concentrated

[0033] and sent to a mixed gas buffer tank 74 arranged at the CO2-enriched mixed gas discharge part. The mixed gas buffer tank 74 is connected to the above-described carbon dioxide conversion device 72.

[0034] ​In the embodiment shown in FIG. 2, the carbon dioxide conversion device 72 is a formate production reaction tank that reacts carbon dioxide contained in the carbon dioxide-enriched mixed gas with hydrogen in a solution containing a metal salt or an organic salt to produce formate. Therefore, this carbon dioxide conversion device 72 includes a mixed gas buffer tank 74 of the carbon dioxide-enriched mixed gas generation device 71, a formate production reaction tank 82 connected to a hydrogen tank 80, and a solution tank 89 that stores a solution containing a metal salt or an organic salt and replenishes the formate production reaction layer 82. The formate, which is the reaction product, is taken out from the bottom of the reaction tank 82 and sent to a formate concentration and solidification tank 86 by a pump 84. The final residual gas remaining in the reaction tank 82 after the reaction is sent to the inlet 711a of the separation membrane module 711 of the carbon dioxide-enriched mixed gas generation device 71 through a line 88 provided at the discharge part. Examples of the above-mentioned metal salts include alkali metal salts and alkaline earth metal salts, and an alkali metal salt is preferred. As the alkali metal salt, an inorganic salt of an alkali metal can be used. The alkali metal salts can be used alone or in combination.

[0035] Examples of the alkali metal ions that make up the cation part of the alkali metal salt include ions of lithium, sodium, potassium, rubidium, and cesium. Among these alkali metal ions, sodium ions or potassium ions are preferred.

[0036] The anion part of the alkali metal salt is not particularly limited as long as it can form an alkali metal formate. Examples of the anion part include hydroxide ions (OH-), chloride ions (Cl-), bromide ions (Br-), iodide ions (I-), nitrate ions (NO3-), sulfate ions (SO42-), phosphate ions (PO43-), borate ions (BO33-), hydrogen carbonate ions (HCO3-), and carbonate ions (CO32-), and it is preferably included at least one selected from these.

[0037] Examples of the alkali metal salts include lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide, lithium chloride, sodium chloride, potassium chloride, rubidium chloride, cesium chloride, lithium sulfate, sodium sulfate, potassium sulfate, rubidium sulfate, cesium sulfate, lithium hydrogen carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, rubidium hydrogen carbonate, cesium hydrogen carbonate, lithium carbonate, sodium carbonate, potassium carbonate, rubidium carbonate, cesium carbonate, and the like. From the viewpoint that by-products are less likely to be mixed when the alkali metal formate is produced and the operations after the second step do not become complicated, hydroxide alkali metal salts, hydrogen carbonate alkali metal salts, or carbonate alkali metal salts are preferred, sodium hydroxide, potassium hydroxide, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium carbonate, and potassium carbonate are more preferred, and sodium hydrogen carbonate and potassium hydrogen carbonate are particularly preferred.

[0038] Examples of the organic salts include diazabicycloundecene, triethylamine, and the like.

[0039] The outlet 711d of the separation membrane module 711 of the carbon dioxide enriched mixed gas generation device 71 is connected to the carbon dioxide adjustment tank 90 provided in the final treatment device 73. The final treatment device 73 is provided with an air direct capture device 30, and this air direct capture device 30 is also connected to the carbon dioxide adjustment tank 90. The adjustment tank 90 mixes the ambient air taken in by the air direct capture device 30 and the residual mixed gas from the outlet 711d of the separation membrane module 711, and sends the mixed gas into the final treatment tank 92 in the final treatment device 73. An adsorbent 92a is disposed in the final treatment tank 92.

[0040] The adsorbent 92a is a carbon dioxide filter composed of a material that adsorbs carbon dioxide in a carbon dioxide-containing gas under adsorption conditions and desorbs the adsorbed carbon dioxide under desorption conditions. Examples of materials that can be used for the adsorbent 92a include amine epoxy-based polymers described in Patent Document 1. The adsorbent 92a adsorbs carbon dioxide at room temperature, which is the adsorption condition, and desorbs the adsorbed carbon dioxide at a high temperature such as about 100°C, which is the desorption condition. These states are shown in FIGS. 4(a) and 4(b), respectively.

[0041] Under the adsorption conditions at room temperature shown in FIG. 4, the mixed gas sent into the final treatment tank 92 in the final treatment device 73 passes through the final treatment tank 92 due to the suction action provided by the fan 94, and during this process, carbon dioxide in the mixed gas is adsorbed by the adsorbent 92a. As a result, a gas substantially free of carbon dioxide is discharged from the final treatment tank 92.

[0042] Next, under the desorption conditions at a high temperature such as about 100°C shown in FIG. 4(b), as shown in FIG. 2, the suction pump 96 connected to the final treatment tank 92 operates to recover a high-concentration carbon dioxide-containing gas containing carbon dioxide desorbed from the adsorbent 92a.

[0043] In the above-described embodiment, the case of recovering a high-concentration carbon dioxide-containing gas containing carbon dioxide adsorbed by the final treatment device 73 has been described, but the present invention is not limited to this. For example, instead of recovering a high-concentration carbon dioxide-containing gas containing carbon dioxide adsorbed by the final treatment device 73, the high-concentration carbon dioxide-containing gas containing carbon dioxide adsorbed by the final treatment device 73 can be passed through the second-stage CO2 separation membrane module 712 or the mixed gas buffer tank 74 and then sent to the carbon dioxide conversion device 72. It may be sent to the carbon dioxide conversion device 72.

[0044] FIG. 3 is a system diagram of a carbon dioxide capture treatment system according to another embodiment of the present invention. Components corresponding to the components in the embodiment of FIG. 2 are denoted by the same reference numerals as in FIG. 2, and the description thereof is omitted.

[0045] In this embodiment, the low-concentration carbon dioxide-containing gas that exits the second-stage CO₂ separation membrane module 712 is returned to the first-stage CO₂ separation membrane module 711, and the separation by the separation membrane modules 711 and 712 is repeated. Further, the final residual gas remaining in the reaction tank 82 after the reaction in the reaction tank 82 is also taken out from the reaction tank 82 and returned to the first-stage CO₂ separation membrane module 711 through the line 88.

[0046] FIG. 5 is a system diagram of a carbon dioxide capture treatment system showing an example of the connection relationship between the carbon dioxide concentration mixed gas generation device 71 and the plant 60 so that carbon dioxide is supplied from the carbon dioxide concentration mixed gas generation device 71 to the plant 60. In FIG. 5, parts common to FIG. 2 are denoted by the same reference numerals as in FIG. 2, and the description thereof is omitted.

[0047] As shown in FIG. 2, the plant 60 is connected to the carbon dioxide concentration mixed gas generation device 71 so as to receive a mixed gas containing carbon dioxide at a low concentration from the outlet portion 711d of the separation membrane module 711 of the carbon dioxide concentration mixed gas generation device 71. In this case, the carbon dioxide concentration of the mixed gas supplied to the plant 60 is adjusted to be optimal for the plant 60.

[0048] As is clear from the above description, according to the present invention that can be implemented by the above-described embodiment, all of the carbon dioxide discharged in the factory is processed within the factory and is not discharged outside the factory. Further, air is taken in from the surrounding environment around the factory, carbon dioxide contained in the taken-in air is separated, and is processed within the factory, so that the carbon dioxide discharged as a whole factory becomes a negative value. Therefore, according to the present invention, it becomes possible to construct a factory that can achieve CO₂ negative emission.

Description of Reference Numerals

[0049] 100 CO₂ negative emission factory 10 Tape manufacturing plant 20 Exhaust Gas Collection and Treatment Building 30 Air Direct Capture Device 40 First Power Generation Facility 50 Second Power Generation Facility 60 Plant 70 Carbon Dioxide Capture and Treatment System 71 Carbon Dioxide Enriched Mixed Gas Generation Device 72 Carbon Dioxide Conversion Device 73 Final Treatment Device 711;712 CO2 Separation Membrane Module 74 Mixed Gas Buffer Tank 80 Hydrogen Tank 82 Formate Generation Reactor 86 Formate Concentration and Solidification Tank

Claims

1. A plant (10) that generates exhaust gas containing carbon dioxide during operation, A carbon dioxide capture treatment system (20), A carbon dioxide direct capture device (30), Comprising: The carbon dioxide capture treatment system (20) An introduction part (711a) that takes in a mixed gas containing carbon dioxide, which at least includes the exhaust gas from the plant (10); a separation membrane (711b) that can increase the carbon dioxide concentration in the mixed gas to generate a carbon dioxide-enriched mixed gas; a concentrated mixed gas discharge part (711c) that discharges the carbon dioxide-enriched mixed gas; and a residual mixed gas discharge part (711d) that discharges a residual mixed gas containing low-concentration carbon dioxide remaining after the carbon dioxide-enriched mixed gas is generated. A carbon dioxide-enriched mixed gas generation device (71), Connected to the concentrated mixed gas discharge part (711c) of the carbon dioxide-enriched mixed gas generation device (71) so as to receive the carbon dioxide-enriched mixed gas from the carbon dioxide-enriched mixed gas generation device (71), reacting carbon dioxide in the received carbon dioxide-enriched mixed gas with hydrogen in a solution containing a metal salt or an organic salt to convert it into a chemically stable hydrogen-containing compound, and discharging the final residual gas remaining after the conversion from the discharge part to be sent to the introduction part (711a) of the carbon dioxide-enriched mixed gas generation device (71). A carbon dioxide conversion device (72) comprising a reaction tank (82), and A final treatment tank (92) comprising an adsorbent (92a) that separates the carbon dioxide by adsorbing it from other gas components. The final treatment tank (92) receives the residual mixed gas from the residual mixed gas discharge part (711d) of the carbon dioxide-enriched mixed gas generation device (71), adsorbs the carbon dioxide in the residual mixed gas received from the carbon dioxide-enriched mixed gas generation device (71) with the adsorbent (92a), and discharges a gas substantially free of carbon dioxide. A final treatment device (73) comprising the final treatment tank (92), Comprising: The carbon dioxide direct capture device (30) takes in air contained in the surrounding environment and supplies it to the final treatment device (73) of the carbon dioxide capture treatment system (20) or upstream thereof. A CO characterized by the following 2 negative emission factory (100).

2. The concentrated mixed gas discharge part (711c) is in a depressurized state. The exhaust gas from the plant (10) is introduced into the introduction part (711a) of the carbon dioxide concentration mixed gas generation device (71) in the carbon dioxide capture treatment system (20). The CO according to claim 1 configured as described above 2 Negative emission factory (100).

3. The separation membrane (711b) of the carbon dioxide enriched mixed gas generation device (71) is composed of a plurality of separation membranes connected in series, and is the CO according to claim 1 or claim 2 2 Negative emission factory (100).

4. The final residual gas from the discharge part of the reaction tank (82) of the carbon dioxide conversion device (72) is transferred to the final treatment device (73) via the carbon dioxide concentration mixed gas generation device (71), according to any one of claims 1 to 3. CO 2 Negative emission factory (100).

5. The carbon dioxide direct capture device (30) is arranged to circulate the taken-in air contained in the surrounding environment to the final treatment device (73) of the carbon dioxide capture treatment system (20), and is the CO according to any one of claims 1 to 4 2 Negative emission factory (100).

6. The exhaust gas from the plant (10) has a carbon dioxide concentration of 1.5 wt% or more, and is the CO according to any one of claims 1 to 5 2 Negative emission factory (100).

7. The final treatment device (73) further includes a recovery container, and the recovery container is configured to recover the carbon dioxide adsorbed by the adsorbent (92a) into the recovery container under heating and / or reduced pressure conditions. When heating is performed during recovery, equipment for utilizing waste heat from the plant (10) is provided for heating during recovery. The CO according to any one of claims 1 to 6 2 Negative emission factory (100).

8. The carbon dioxide conversion device (72) converts carbon dioxide in the received carbon dioxide-enriched mixed gas into carbonate and discharges the final residual gas from the discharge part. The CO according to any one of claims 1 to 7 2 Negative emission factory (100).

9. The carbonate according to claim 8 is calcium carbonate, and the CO 2 Negative emission factory (100).

10. The carbon dioxide capture treatment system (20) is configured to be driven by natural energy, according to any one of claims 1 to 9, CO 2 Negative emission factory (100).

11. The carbon dioxide-enriched mixed gas is transferred to the reaction tank (82) via a mixed gas buffer tank (74) connected to the concentrated mixed gas discharge section (711c) of the carbon dioxide-enriched mixed gas generation device (71), according to any one of claims 1 to 10. CO 2 Negative emission factory (100).

12. A carbon dioxide capture treatment system (20) for capturing and treating carbon dioxide, An introduction part (711a) for taking in a mixed gas containing carbon dioxide, a separation membrane (711b) capable of increasing the carbon dioxide concentration in the mixed gas to generate a carbon dioxide concentration mixed gas, a concentrated mixed gas discharge part (711c) for discharging the carbon dioxide concentration mixed gas, and a residual mixed gas discharge part (711d) for discharging a residual mixed gas containing low-concentration carbon dioxide remaining after the carbon dioxide concentration mixed gas is generated. A carbon dioxide concentration mixed gas generation device (71) provided with Connected to the concentrated mixed gas discharge part (711c) of the carbon dioxide concentration mixed gas generation device (71) so as to receive the carbon dioxide concentration mixed gas from the carbon dioxide concentration mixed gas generation device (71), reacting carbon dioxide in the received carbon dioxide concentration mixed gas with hydrogen in a solution containing a metal salt or an organic salt to convert it into a chemically stable hydrogen-containing compound, and discharging the final residual gas remaining after the conversion from the discharge part to send it to the introduction part (711a) of the carbon dioxide concentration mixed gas generation device (71). A carbon dioxide conversion device (72) provided with a reaction tank (82). A final treatment tank (92) provided with an adsorbent (92a) for adsorbing carbon dioxide to separate the carbon dioxide from other gas components. The final treatment tank (92) receives the residual mixed gas from the residual mixed gas discharge part (711d) of the carbon dioxide concentration mixed gas generation device (71), and adsorbs carbon dioxide in the received residual mixed gas by the adsorbent (92a) to discharge a gas substantially free of carbon dioxide. A final treatment device (73) provided with the final treatment tank (92), and A carbon dioxide direct capture device (30) that takes in air contained in the surrounding environment and supplies it to the final treatment device (73) or upstream thereof. A carbon dioxide capture treatment system (20), characterized by comprising

13. The concentrated mixed gas discharge part (711c) is in a reduced pressure state. The mixed gas containing carbon dioxide is the carbon dioxide capture processing system (20) according to claim 12, which is configured to be introduced into the introduction part (711a) of the carbon dioxide concentration mixed gas generation device (71) in the carbon dioxide capture processing system (20).

14. The final residual gas from the discharge part of the reaction tank (82) of the carbon dioxide conversion device (72) is transferred to the final treatment device (73) via the carbon dioxide concentration mixed gas generation device (71) in the carbon dioxide capture processing system (20) according to claim 12 or claim 13.

15. A plant (10) that generates exhaust gas containing carbon dioxide during operation, Exhaust gas collection and separation equipment that collects exhaust gas from the plant and separates carbon dioxide from other exhaust gas components to generate a carbon dioxide-containing gas, Conversion equipment that receives the carbon dioxide-containing gas formed in the exhaust gas collection and separation equipment from the exhaust gas collection and separation equipment, and reacts the carbon dioxide contained in the carbon dioxide-containing gas with hydrogen in a solution containing a metal salt or an organic salt to convert it into a chemically stable hydrogen-containing compound, First power generation equipment that receives the hydrogen-containing compound from the conversion equipment, decomposes it to generate electric power, and supplies the generated electric power to the plant, Second power generation equipment that generates electric power by natural energy and supplies the generated electric power to the plant, Carbon dioxide capture equipment that captures carbon dioxide contained in the surrounding environment and supplies the captured carbon dioxide to the conversion equipment, A CO characterized by comprising 2 Negative emission factory (100).

16. It further includes hydrogen generation equipment that receives the hydrogen-containing compound from the conversion equipment and decomposes it to generate hydrogen, In the first power generation equipment, the hydrogen generated by the hydrogen generation equipment is used as an energy source to generate electric power, and the generated electric power is supplied to the plant. CO according to claim 15 2 Negative emission factory (100).

17. The exhaust gas collection and separation equipment according to claim 15 or claim 16, which is provided with a concentration facility using a separation membrane, for CO 2 Negative emission factory (100).

18. Comprising a plurality of separation membranes, a part of the plurality of separation membranes constitutes the concentration facility, and the remaining separation membranes separate residual carbon dioxide remaining in the residual gas after the generation of the carbon dioxide-containing gas in the concentration facility from other exhaust components, and the CO according to claim 17, comprising a residual carbon dioxide separation facility 2 Negative emission factory (100).

19. The CO according to any one of claims 15 to 17, further comprising a plant factory, wherein at least a part of the carbon dioxide-containing gas from the exhaust gas collection and separation facility is supplied to the plant factory. 2 Negative emission factory (100).

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