Degassing apparatus and method utilizing dissolving apparatus for carbon dioxide in exhaust gas and porous degassing agent

Abstract

The present invention relates to: an apparatus and method for dissolving carbon dioxide in exhaust gas, wherein, by using water as a solvent on the basis of the characteristics of carbon dioxide having excellent solubility in water, carbon dioxide contained in exhaust gas is dissolved at a high concentration with only a short gas-liquid contact time, thereby enabling a reduction in economic costs required for capturing and removing carbon dioxide for greenhouse gas discharge facilities, while at the same time, increasing energy efficiency; and to an apparatus and method for degassing dissolved carbon dioxide using a porous degassing agent, wherein, by uniformly distributing water, in which carbon dioxide is dissolved, over the entire surface of a degassing tower to be in contact with a porous degassing agent filled inside the degassing tower, the dissolved carbon dioxide is degassed in a gas phase, and microbubbles are formed and then grow into large bubbles by combining with each other, resulting in rising discharge, and as carbon dioxide gas is captured and recovered, carbon dioxide dissolved from the water in which carbon dioxide is dissolved can be degassed and recovered with high efficiency.

Description

Degassing device and method utilizing a carbon dioxide dissolution device in flue gas and a porous degassing agent

[0001] The present invention relates to a degassing device and method for dissolved carbon dioxide, wherein dissolved carbon dioxide contained in flue gas emitted from greenhouse gas emission facilities such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, and various processing facilities is dissolved in a solvent to recover dissolved carbon dioxide. More specifically, the invention relates to a degassing device and method for dissolved carbon dioxide utilizing a porous degassing agent, wherein dissolved carbon dioxide is evenly distributed across the front of a degassing tower and brought into contact with a porous degassing agent filled inside the degassing tower, so that dissolved carbon dioxide is degassed into a gaseous state to form microbubbles, which then grow into large bubbles through mutual coupling and rise and are discharged, thereby allowing the carbon dioxide gas to be captured and recovered, so that dissolved carbon dioxide can be recovered from the dissolved carbon dioxide water with high efficiency.

[0002] Generally, greenhouse gases (GHGs) refer to specific gases that play a role in raising the temperature of the Earth's surface by absorbing or reflecting infrared radiation emitted from the Earth's surface into space.

[0003] While greenhouse gases such as water vapor play an essential role in maintaining the Earth's temperature, the greenhouse gases currently causing concern are anthropogenic gases, such as carbon dioxide produced by the excessive use of fossil fuels resulting from industrialization. These anthropogenic gases raise the Earth's average temperature above the appropriate level, causing global warming. Anthropogenic greenhouse gases include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and substances such as HFCs, PFCs, and SF6. These substances have been designated as targets for greenhouse gas emission reduction under the Kyoto Protocol to mitigate the intensifying global warming phenomenon worldwide.

[0004] Multifaceted attempts are being made worldwide to reduce emissions of carbon dioxide, which is the primary cause of climate change among the aforementioned greenhouse gases.

[0005] In 2020, the Republic of Korea declared "2050 Carbon Neutrality" at the government level, raised its Nationally Determined Contribution (NDC) for 2030 to a final goal of a 40% reduction compared to 2018 levels, and is making multifaceted efforts to achieve this.

[0006] In the case of South Korea, key national industries such as power generation, steel, petrochemicals, oil refining, and cement are major greenhouse gas emitters (the top five industries account for about 80% of all industries), so there are limitations to achieving carbon neutrality by reducing carbon emissions alone; therefore, it is urgent to establish additional strategies to achieve the National Greenhouse Gas Reduction Target (NDC).

[0007] The United States, Australia, China, and Norway are investing in large-scale Carbon Capture and Utilization (CCU) projects of over 1 million tons per year, and are actively implementing various research investments and providing various tax incentives to commercialize CCU technology.

[0008] Carbon Capture and Utilization (CCU) is recognized as an important technology in Korea as a key technology field of the Carbon Neutral Green Growth Technology Innovation Strategy; however, the current situation is that economic feasibility has not yet been achieved due to the low level of technological maturity.

[0009] Current Carbon Capture and Utilization (CCU) technologies, both domestically and internationally, generally remain at the basic application stage. In particular, the excessive energy consumption in the capture process necessitates the urgent development of core technologies to overcome the limitations of existing ones. In other words, the practical application and commercialization of developed technologies are continuously being delayed due to the relatively high cost (over $70 / ton CO2) required for carbon dioxide capture and removal.

[0010] In Korea, demonstration studies on small-to-medium scale carbon capture using wet, dry, and membrane technologies have been conducted, primarily targeting combustion flue gases from power generation facilities. Domestic carbon capture technology is currently concentrated on flue gases from coal-fired power plants (with CO2 concentrations in the range of 10–20%). It is essential to develop low-cost, high-efficiency, and large-capacity carbon capture technologies applicable under different conditions (temperature, pressure, gas composition, etc.) in various greenhouse gas-heavy industries, such as cement, steel, petrochemicals, and oil refining, in addition to the power generation industry.

[0011] Meanwhile, the carbon capture process is the most expensive step in the carbon capture and utilization (CCU) process, accounting for 70-80% of the total cost.

[0012] The carbon capture process is broadly composed of a carbon adsorption and absorption process that adsorbs or absorbs carbon dioxide from flue gas, and a carbon degassing and recovery process that recovers carbon dioxide bound to the adsorbent or absorbent by degassing it into a gaseous state.

[0013] The United States is a leading country in carbon capture technology, conducting not only basic and fundamental research but also various large-scale demonstration projects across the entire cycle of carbon capture, storage, and utilization. In particular, it operates large-scale carbon capture facilities utilizing amine-based adsorbents for power plants and steel industrial facilities.

[0014] As an example of a carbon dioxide capture technology using an amine-based adsorbent, Korean Patent Publication No. 10-2018-0043936 (published May 2, 2018) discloses a method for manufacturing a carbon dioxide adsorbent and a carbon dioxide adsorbent manufactured thereby, comprising the steps of: heating and activating a porous metal-organic framework; immersing the activated porous metal-organic framework in a polyvalent amine dissolved in the solvent to form a suspension; sonicating the formed suspension; and microwave-treating the sonicated suspension.

[0015] In addition, Korean Patent Publication No. 10-2016-0126682 (published Nov. 02, 2016) discloses a carbon dioxide adsorbent comprising a modified amine and a method for manufacturing the same, wherein silica is used as a porous support, the modified amine is chemically bonded to the surface of the porous support, and the modified amine is an amine modified by reacting a silane-based amine with acrylonitrile.

[0016] In addition, Korean Patent Publication No. 10-2015-0041257 (published on April 16, 2015) discloses a method for carbon dioxide absorption and regeneration comprising: a step of absorbing carbon dioxide by contacting a carbon dioxide absorption composition containing an inorganic salt carbon dioxide absorption solution and a tertiary alkanolamine with a mixed gas containing carbon dioxide; b step of cooling the carbon dioxide absorption composition that has absorbed carbon dioxide to solidify it into a slurry solution; c step of separating the slurry solution formed by step b into a liquid absorption solution containing solidly crystallized bicarbonate crystals and a tertiary alkanolamine; and d step of recovering the liquid absorption solution separated in step c and heating the solidly crystallized bicarbonate crystals to separate carbon dioxide.

[0017] In addition, Korean Patent Publication No. 10-2015-0041257 (published on April 16, 2015) discloses a carbon dioxide absorption and regeneration device comprising: an absorption tower for absorbing carbon dioxide from combustion flue gas using a carbon dioxide absorption composition; a crystallizer for cooling the carbon dioxide absorption composition, from which carbon dioxide has been absorbed and discharged from the absorption tower, using a cooler or heat exchanger to form solid bicarbonate crystals; a filter for separating solid bicarbonate crystals and a liquid absorption solution containing tertiary alkanolamine from a slurry that has passed through the crystallizer; and a regenerator for heating the solid bicarbonate crystals to separate carbon dioxide.

[0018] Amine-based adsorbents face significant limitations in achieving economic viability because they are corrosive and volatile, and require a large amount of energy for the regeneration process. In the case of chemical wet adsorption methods using amine-based adsorbents, more than 70% of the total energy used in the carbon dioxide capture process is consumed in the thermal regeneration of the adsorbent, so there have been no cases of developing or commercializing economically viable adsorbents to date.

[0019] For carbon capture technology to be economically viable, it is essential to develop low-cost, high-efficiency, and large-capacity carbon dioxide capture technology utilizing new solvents other than amines (such as water). The key to such carbon capture technology is to achieve high carbon dioxide absorption and degassing efficiencies, particularly low-energy and high-efficiency carbon dioxide degassing efficiencies within a short period of time. The main reason new solvents such as water have not been utilized in carbon capture processes is the failure to develop a high-efficiency degassing process.

[0020] Next-generation carbon capture technology, which possesses economic feasibility, efficiency, and versatility, is preferably required to secure conditions such as a carbon recovery rate of 90% or more, a carbon purity of 95% or more, and carbon capture costs below the carbon emission trading price.

[0021] The objective of the present invention is to provide a device and method for degassing dissolved carbon dioxide using a porous degassing agent after dissolving carbon dioxide in flue gas emitted from greenhouse gas emission facilities, such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, and various processing facilities, so as to reduce the economic costs required for carbon dioxide capture and removal in greenhouse gas emission facilities and increase energy efficiency by utilizing water as a solvent based on the characteristics of carbon dioxide, which has excellent solubility in water, to dissolve carbon dioxide at a high concentration with only a short gas-liquid contact time, rather than carbon capture technology based on adsorbents such as amine-based adsorbents.

[0022] The objective of the present invention is achieved by providing a device for dissolving carbon dioxide in flue gas, comprising: a carbon dioxide dissolution tower having an inlet on one side, an outlet for discharging dissolved carbon dioxide water on the other side, and an exhaust port for discharging purified gas on the upper side; a reservoir in which a solvent is stored; a solvent supply pipe connecting the reservoir and the inlet of the carbon dioxide dissolution tower and supplying the solvent in the reservoir into the carbon dioxide dissolution tower; a flue gas supply pipe branched to the solvent supply pipe and supplying flue gas discharged from a greenhouse gas emission facility into the solvent supply pipe; and a multi-flow channel formed within the carbon dioxide dissolution tower, wherein the solvent and the flue gas supplied into the carbon dioxide dissolution tower through the solvent supply pipe flow upward in a zigzag shape, thereby inducing the carbon dioxide in the flue gas to dissolve in the solvent and thereby separating the dissolved carbon dioxide water and the purified gas.

[0023] According to a preferred feature of the present invention, the solvent is water.

[0024] According to a preferred feature of the present invention, the carbon dioxide dissolution tower has a rectangular prism or a cylindrical shape.

[0025] According to a preferred feature of the present invention, the inlet is provided at the lower part of one side of the carbon dioxide dissolution tower, and the outlet is provided at the upper part of the other side of the carbon dioxide dissolution tower.

[0026] According to a preferred feature of the present invention, a first control valve for controlling the outflow amount of the carbon dioxide dissolved water is installed at the outlet, and a second control valve for controlling the outflow amount of the purified gas is installed at the exhaust port.

[0027] According to a preferred feature of the present invention, the solvent in the reservoir is maintained at a temperature of 10 to 50°C and a dissolved CO2 concentration of 0 to 500 mg / L.

[0028] According to a preferred feature of the present invention, a pressure pump is installed on the solvent supply pipe to pressurize and transfer the solvent in the reservoir at high pressure.

[0029] According to a preferred feature of the present invention, the pressure pump is operated at an operating pressure of 3 to 30 bar.

[0030] According to a preferred feature of the present invention, a first check valve is installed on the solvent supply pipe to prevent backflow of the solvent.

[0031] According to a preferred feature of the present invention, a compressor for pressurizing and supplying the exhaust gas is installed in the exhaust gas supply pipe.

[0032] According to a preferred feature of the present invention, a second check valve is installed in the exhaust gas supply pipe to prevent backflow of the exhaust gas.

[0033] According to a preferred feature of the present invention, the multi-flow channel is formed by alternately arranging a first flow channel forming plate fixed to one side inside the carbon dioxide dissolution tower and extending to the other side, and a second flow channel forming plate fixed to the other side inside the carbon dioxide dissolution tower and extending to one side.

[0034] According to a preferred feature of the present invention, the first flow channel forming plate and the second flow channel forming plate are formed as corrugated plates.

[0035] In addition, the objective of the present invention is to provide a carbon dioxide dissolution tower having an inlet on one side, an outlet for discharging carbon dioxide dissolved water on the other side, and an exhaust port for discharging purified gas on the upper side; a reservoir in which a solvent is stored; a solvent supply pipe connecting the reservoir and the inlet of the carbon dioxide dissolution tower and supplying the solvent in the reservoir into the carbon dioxide dissolution tower; a flue gas supply pipe branched to the solvent supply pipe and supplying flue gas discharged from a greenhouse gas emission facility into the solvent supply pipe; and a multi-flow channel formed within the carbon dioxide dissolution tower, which induces the carbon dioxide in the flue gas to dissolve in the solvent by causing the solvent and the flue gas supplied into the carbon dioxide dissolution tower through the solvent supply pipe to flow upward in a zigzag shape, thereby separating and generating the carbon dioxide dissolved water and the purified gas. This can be achieved by providing a device for dissolving carbon dioxide in flue gas, comprising a flue gas injector installed at the connection point between the solvent supply pipe and the flue gas supply pipe, which mixes the flue gas of the flue gas supply pipe with the solvent flowing through the solvent supply pipe and supplies it into the carbon dioxide dissolution tower.

[0036] According to a preferred feature of the present invention, the solvent is water.

[0037] According to a preferred feature of the present invention, the carbon dioxide dissolution tower has a rectangular prism or a cylindrical shape.

[0038] According to a preferred feature of the present invention, the inlet is provided at the lower part of one side of the carbon dioxide dissolution tower, and the outlet is provided at the upper part of the other side of the carbon dioxide dissolution tower.

[0039] According to a preferred feature of the present invention, a first control valve for controlling the outflow amount of the carbon dioxide dissolved water is installed at the outlet, and a second control valve for controlling the outflow amount of the purified gas is installed at the exhaust port.

[0040] According to a preferred feature of the present invention, the solvent in the reservoir is maintained at a temperature of 10 to 50°C and a dissolved CO2 concentration of 0 to 500 mg / L.

[0041] According to a preferred feature of the present invention, a pressure pump is installed on the solvent supply pipe to pressurize and transfer the solvent in the reservoir at high pressure.

[0042] According to a preferred feature of the present invention, the pressure pump is operated at an operating pressure of 3 to 30 bar.

[0043] According to a preferred feature of the present invention, a first check valve is installed on the solvent supply pipe to prevent backflow of the solvent.

[0044] According to a preferred feature of the present invention, a compressor for pressurizing and supplying the exhaust gas is installed in the exhaust gas supply pipe.

[0045] According to a preferred feature of the present invention, a second check valve is installed in the exhaust gas supply pipe to prevent backflow of the exhaust gas.

[0046] According to a preferred feature of the present invention, the multi-flow channel is formed by alternately arranging a first flow channel forming plate fixed to one side inside the carbon dioxide dissolution tower and extending to the other side, and a second flow channel forming plate fixed to the other side inside the carbon dioxide dissolution tower and extending to one side.

[0047] According to a preferred feature of the present invention, the first flow channel forming plate and the second flow channel forming plate are formed as corrugated plates.

[0048] According to a preferred feature of the present invention, the exhaust gas injector includes an orifice in which a throttling portion and an expanding portion are connected in alignment in the direction of supply of the exhaust gas, and the exhaust gas supply pipe is connected in alignment at the point of connection between the throttling portion and the expanding portion.

[0049] According to a preferred feature of the present invention, the cross-sectional area of ​​the throttling portion of the exhaust gas injector is gradually reduced at an angle of 20 to 60°, and the cross-sectional area of ​​the expanding portion of the exhaust gas injector is gradually expanded at an angle of 10 to 30°.

[0050] In addition, the objective of the present invention is achieved by providing a method for dissolving carbon dioxide in flue gas, comprising: a first step of mixing flue gas discharged from a greenhouse gas emission facility with a solvent and supplying it to the lower part of a carbon dioxide dissolution tower; a second step of separating the solvent and flue gas supplied into the carbon dioxide dissolution tower into carbon dioxide dissolved water and purified gas by bringing them into gas-liquid contact while transferring them to the upper part through a multi-flow channel formed in the carbon dioxide dissolution tower; and a third step of separating and discharging the carbon dioxide dissolved water and purified gas from the upper part of the carbon dioxide dissolution tower.

[0051] According to a preferred feature of the present invention, in the first step, the mixing of the solvent into the exhaust gas is achieved by an exhaust gas injector comprising an orifice that automatically mixes the exhaust gas by means of a negative pressure formed by the orifice flow of the solvent, and in the second step, the multi-flow channel is formed by an alternatingly spaced arrangement of a first flow channel forming plate fixed to one side inside the carbon dioxide dissolution tower and extending to the other side, and a second flow channel forming plate fixed to the other side inside the carbon dioxide dissolution tower and extending to one side.

[0052] In addition, the device and method for dissolving carbon dioxide in flue gas according to the present invention are similar in principle to the water-scrubbing technology, which is utilized as one of the biogas purification technologies in terms of gas-liquid contact. However, unlike the conventional water-scrubbing method, which operates in a counter-flow manner with flue gas supplied from the bottom to the top while water is supplied from the top to the bottom, the device operates in a parallel flow manner with flue gas and water supplied simultaneously in the bottom direction. Furthermore, a flue gas injector is installed to introduce flue gas, and a multi-flow channel is applied internally to maximize gas-liquid contact efficiency, thereby reducing the cost required to recover carbon dioxide to, for example, 30 dollars / ton_CO2 or less, which has the advantage of significantly increasing the efficiency and versatility of carbon capture and utilization (CCU).

[0053] Another objective of the present invention is achieved by providing a degassing device for dissolved carbon dioxide utilizing a porous degassing agent, comprising: a degassing tower; a dissolving water supply pipe connected to the lower side of the degassing tower and supplying carbon dioxide dissolving water; a porous degassing agent formed by filling a porous carrier in a column shape inside the degassing tower and increasing the contact area and contact time with the carbon dioxide dissolving water to degas carbon dioxide; a degassing water discharge pipe connected to the upper side of the degassing tower and discharging carbon dioxide degassed water formed by degassing carbon dioxide from the carbon dioxide dissolving water; and a carbon dioxide exhaust pipe connected to the upper side of the degassing tower and exhausting the carbon dioxide degassed from the carbon dioxide dissolving water.

[0054] According to a preferred feature of the present invention, the invention further comprises a lower rectification plate installed spaced apart from the lower side of the porous degasifier within the degasification tower and having a plurality of holes formed therein.

[0055] According to a preferred feature of the present invention, the invention further comprises an upper rectification plate having a plurality of holes formed therein, which is installed spaced apart from the upper side of the porous degasser within the degasification tower.

[0056] According to a preferred feature of the present invention, the degassing tower is formed in the shape of a cylinder or a rectangular column.

[0057] According to a preferred feature of the present invention, a drain pipe is connected to the bottom of the degassing tower.

[0058] According to a preferred feature of the present invention, a viewing window capable of internal viewing is formed extending vertically on the upper side of the degassing tower.

[0059] According to a preferred feature of the present invention, an inline mixer is installed on the dissolved water supply pipe.

[0060] According to a preferred feature of the present invention, the inline mixer is formed as a static mixer having a spiral member for forming turbulence inside.

[0061] According to a preferred feature of the present invention, the carbon dioxide dissolved water is supplied through the dissolved water supply pipe at an operating pressure of 1 to 3 bar.

[0062] According to a preferred feature of the present invention, the porous degasser is supported by a perforated support plate installed on the lower inner side of the degass tower.

[0063] According to a preferred feature of the present invention, the porous carrier forming the porous degassing agent is formed from one or more granular bodies selected from activated carbon (AC), modified activated carbon impregnated with a metal salt containing iron or magnesium, zeolite, modified zeolite impregnated with a metal salt containing iron or magnesium, silicon dioxide (SiO2), modified silicon dioxide impregnated with a metal salt containing iron or magnesium, silica gel (SiO2·nH2O), modified silica gel impregnated with a metal salt containing iron or magnesium, alumina (Al2O3), modified alumina impregnated with a metal salt containing iron or magnesium, iron-zeolite (Fe-ZSM-S) catalyst, iron-silicon dioxide (Fe-SiO2) catalyst, and Mg-activated carbon (AC) catalyst.

[0064] The porous carrier forming the above-mentioned porous degassing agent is nonpolar or hydrophobic, has a large number of micropores with a nanometer diameter, and has a specific surface area of ​​100 m² 2 It is desirable that it be greater than / g.

[0065] According to a preferred feature of the present invention, the porous degasser is filled with a bed height of 200 to 1,000 mm to have an Empty Bed Contact Time (EBCT) of 2 to 10 minutes.

[0066] In addition, the objective of the present invention can be achieved by providing a degassing device for dissolved carbon dioxide utilizing a porous degassing agent, comprising: a degassing tower; a dissolving water supply pipe connected to the lower side of the degassing tower and supplying carbon dioxide dissolving water; a porous degassing agent formed by filling a porous carrier in a column shape inside the degassing tower and increasing the contact area and contact time with the carbon dioxide dissolving water to degas carbon dioxide; a degassing water discharge pipe connected to the upper side of the degassing tower and discharging carbon dioxide degassed water formed by degassing carbon dioxide from the carbon dioxide dissolving water; a carbon dioxide exhaust pipe connected to the upper side of the degassing tower and exhausting the carbon dioxide degassed from the carbon dioxide dissolving water; and a vacuum pump installed on the carbon dioxide exhaust pipe.

[0067] According to a preferred feature of the present invention, the invention further comprises a lower rectification plate installed spaced apart from the lower side of the porous degasifier within the degasification tower and having a plurality of holes formed therein.

[0068]

[0069] According to a preferred feature of the present invention, the invention further comprises an upper rectification plate having a plurality of holes formed therein, which is installed spaced apart from the upper side of the porous degasser within the degasification tower.

[0070] According to a preferred feature of the present invention, the degassing tower is formed in the shape of a cylinder or a rectangular column.

[0071] According to a preferred feature of the present invention, a drain pipe is connected to the bottom of the degassing tower.

[0072] According to a preferred feature of the present invention, a viewing window capable of internal viewing is formed extending vertically on the upper side of the degassing tower.

[0073] According to a preferred feature of the present invention, an inline mixer is installed on the dissolved water supply pipe.

[0074] According to a preferred feature of the present invention, the inline mixer is formed as a static mixer having a spiral member for forming turbulence inside.

[0075] According to a preferred feature of the present invention, the carbon dioxide dissolved water is supplied through the dissolved water supply pipe at an operating pressure of 1 to 3 bar.

[0076] According to a preferred feature of the present invention, the porous degasser is supported by a perforated support plate installed on the lower inner side of the degass tower.

[0077] According to a preferred feature of the present invention, the porous carrier forming the porous degassing agent is formed from one or more granular bodies selected from activated carbon (AC), modified activated carbon impregnated with a metal salt containing iron or magnesium, zeolite, modified zeolite impregnated with a metal salt containing iron or magnesium, silicon dioxide (SiO2), modified silicon dioxide impregnated with a metal salt containing iron or magnesium, silica gel (SiO2·nH2O), modified silica gel impregnated with a metal salt containing iron or magnesium, alumina (Al2O3), modified alumina impregnated with a metal salt containing iron or magnesium, iron-zeolite (Fe-ZSM-S) catalyst, iron-silicon dioxide (Fe-SiO2) catalyst, and Mg-activated carbon (AC) catalyst.

[0078] According to a preferred feature of the present invention, the porous degasser is filled with a bed height of 200 to 1,000 mm to have an Empty Bed Contact Time (EBCT) of 2 to 10 minutes.

[0079] According to a preferred feature of the present invention, the vacuum pump is operated at an operating pressure of 0.01 to 1.0 bar.

[0080] In addition, the objective of the present invention is achieved by providing a method for degassing dissolved carbon dioxide using a porous degassing agent, comprising: a step 11 of introducing dissolved carbon dioxide water into a degassing tower; a step 12 of distributing the dissolved carbon dioxide water evenly across the entire inner surface of the degassing tower; a step 13 of bringing the dissolved carbon dioxide water into contact with a porous degassing agent filled inside the degassing tower; a step 14 of degassing the dissolved carbon dioxide water into a gaseous state to form microbubbles; a step 15 of the microbubbles growing into giant bubbles through mutual coupling and rising and discharging; and a step 16 of capturing and recovering the carbon dioxide gas degassed from the dissolved carbon dioxide water and rising and discharging.

[0081] The apparatus and method for degassing dissolved carbon dioxide using a porous degassing agent according to the present invention have the advantage of degassing and recovering dissolved carbon dioxide from carbon dioxide dissolved water in which carbon dioxide contained in flue gas emitted from greenhouse gas emission facilities, such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, and various processing facilities is dissolved through a solvent, and the carbon dioxide dissolved water is evenly distributed across the front of the degassing tower and brought into contact with a porous degassing agent filled inside the degassing tower so that the dissolved carbon dioxide is degassed into a gaseous state to form microbubbles, which then grow into large bubbles through mutual combination and rise and are discharged, thereby capturing and recovering the carbon dioxide gas, so that the dissolved carbon dioxide can be degassing and recovered from the carbon dioxide dissolved water with high efficiency, while simultaneously reducing the economic cost required for carbon dioxide capture and removal for greenhouse gas emission facilities and increasing energy efficiency.

[0082] Furthermore, the device and method for degassing dissolved carbon dioxide using a porous degassing agent according to the present invention share similarities in principle with the water-scrubbing technology, which is utilized as a biogas purification technology, in terms of gas-liquid contact. However, unlike the conventional water-scrubbing method, it aims for carbon capture rather than carbon removal or methane purification; thus, it not only secures high degassing efficiency but also has the advantage of recovering the entire amount of carbon dioxide without releasing it into the atmosphere during this process.

[0083] FIG. 1 is an overall configuration diagram of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0084] FIG. 2 is a diagram showing the main monitoring items of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0085] FIG. 3 is an operating structure diagram of a carbon dioxide dissolution tower using a multi-flow channel in a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0086] FIG. 4 is an operating structure diagram of an exhaust gas injector in a device for dissolving carbon dioxide in exhaust gas according to one embodiment of the present invention.

[0087] FIG. 5 is a design example of an exhaust gas injector in a device for dissolving carbon dioxide in exhaust gas according to one embodiment of the present invention.

[0088] FIG. 6 is a simulated correlation table between the dissolved carbon dioxide saturation rate and the carbon dioxide gas injection rate according to the operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0089] FIG. 7 is a graph showing the simulated correlation between the dissolved carbon dioxide saturation rate and the carbon dioxide gas injection rate according to the operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0090] FIG. 8 is a graph showing the change in pH of the carbon dioxide dissolved water during continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0091] FIG. 9 is a graph showing the change in total alkalinity of the carbon dioxide dissolved water during continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0092] FIG. 10 is a graph showing the change in dissolved carbon dioxide concentration in carbon dioxide dissolved water according to the continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0093] FIG. 11 is a graph showing the change in pH of the effluent from a carbon dioxide dissolution tower during long-term continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0094] FIG. 12 is a graph showing the change in water temperature of the effluent from the carbon dioxide dissolution tower during long-term continuous operation of the carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0095] FIG. 13 is a graph showing the change in dissolved carbon dioxide concentration in the effluent of a carbon dioxide dissolution tower according to the continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0096] FIG. 14 shows the incremental change in the concentration of dissolved carbon dioxide in the effluent of a carbon dioxide dissolution tower during continuous operation of a carbon dioxide dissolution device in flue gas according to an embodiment of the present invention.

[0097] FIG. 15 is an overall configuration diagram of a dissolved carbon dioxide degassing device utilizing a porous degassing agent according to one embodiment of the present invention.

[0098] FIG. 16 is a diagram showing the main monitoring items of a dissolved carbon dioxide degassing device utilizing a porous degassing agent according to one embodiment of the present invention.

[0099] FIG. 17 is a drawing showing various embodiments of a porous degasser in a dissolved carbon dioxide degassing device utilizing a porous degasser according to one embodiment of the present invention.

[0100] FIG. 18 is a graph showing the pH characteristics of the degassed water according to the type of porous degasser in a degassed carbon dioxide degasser utilizing a porous degasser according to one embodiment of the present invention.

[0101] FIG. 19 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water according to the type of porous degasser in a degassed device for dissolved carbon dioxide using a porous degasser according to an embodiment of the present invention.

[0102] FIG. 20 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water according to the amount of activated carbon and operating time in a degassed device for dissolved carbon dioxide utilizing a porous degasser according to one embodiment of the present invention.

[0103] FIG. 21 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water according to the activated carbon contact time in a degassed device for dissolved carbon dioxide utilizing a porous degasser according to one embodiment of the present invention.

[0104] FIG. 22 is a graph showing the characteristics of the dissolved carbon dioxide (CO2) concentration in the degassed water when a vacuum pump is not installed in the carbon dioxide exhaust pipe in a degassed water device utilizing a porous degasser according to one embodiment of the present invention.

[0105] FIG. 23 is a graph showing the characteristics of the dissolved carbon dioxide (CO2) concentration in the degassed water when a vacuum pump is installed in the carbon dioxide exhaust pipe in a degassed device for dissolved carbon dioxide utilizing a porous degasser according to one embodiment of the present invention.

[0106] FIG. 24 is a graph showing the pH characteristics of degassed water during continuous operation of a degassed device for dissolved carbon dioxide using a porous degasser according to one embodiment of the present invention.

[0107] FIG. 25 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water during continuous operation of a degassed device for dissolved carbon dioxide using a porous degasser according to one embodiment of the present invention.

[0108] Hereinafter, preferred embodiments and each component of the present invention are described in detail. This description is intended to be sufficient for a person skilled in the art to easily practice the invention, and does not imply that the technical scope and concept of the present invention are limited thereby.

[0109] FIG. 1 is an overall configuration diagram of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0110] A carbon dioxide dissolution device in exhaust gas according to one embodiment of the present invention includes a carbon dioxide dissolution tower (10), a water tank (20), a solvent supply pipe (30), an exhaust gas supply pipe (40), and a multi-flow channel (50), as shown in FIG. 1.

[0111] The carbon dioxide dissolution tower (10) is a type of gas-liquid reaction tower in which the carbon dioxide contained in the flue gas is dissolved in the solvent by reacting with the solvent supplied through the solvent supply pipe (30) after being stored in the reservoir (20) and the flue gas supplied through the flue gas supply pipe (40) which is discharged from greenhouse gas emission facilities (not shown), such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, various processing facilities, etc., so that the solvent is supplied through the solvent supply pipe (40). As shown in FIGS. 1 and 2, it is preferable to have a rectangular prism shape, but depending on the embodiment, it can also be formed in other shapes including a cylinder (cylindrical) shape, a hexagonal prism, an octagonal prism, an elliptical prism, etc.

[0112] One side of the carbon dioxide dissolution tower (10) is provided with an inlet (11) connected to a solvent supply pipe (30) and an exhaust gas supply pipe (40) to allow the solvent and exhaust gas to flow in, and the other side of the carbon dioxide dissolution tower (10) is provided with an outlet (12) through which carbon dioxide dissolved water, generated by dissolving carbon dioxide contained in the solvent and exhaust gas within the carbon dioxide dissolution tower (10) into the solvent, is discharged.

[0113] At this time, it is preferable that an inlet port (11) be provided at the lower side of one end of the carbon dioxide dissolution tower (10) and an outlet port (12) be provided at the upper side of the other end of the carbon dioxide dissolution tower (10) so that a gas-liquid reaction between the solvent and the exhaust gas can occur as the solvent and the exhaust gas rise from the lower side to the upper side along the multi-flow channel (50) to be described later inside the carbon dioxide dissolution tower (10). In addition, a first control valve (12a) for controlling the amount of carbon dioxide dissolved water discharged may be installed at the outlet port (12).

[0114] In addition, an exhaust port (13) is provided on the upper side, particularly at the top, of the carbon dioxide dissolution tower (10) to discharge purified gas from which carbon dioxide has been dissolved and removed from the exhaust gas. Additionally, a second control valve (13a) for controlling the discharge amount of purified gas may be installed in the exhaust port (13).

[0115] A reservoir (20) is installed separately from the aforementioned carbon dioxide dissolution tower (10). The reservoir (20) corresponds to a solvent storage tank in which a solvent is stored to dissolve and remove carbon dioxide contained in the exhaust gas.

[0116] It is preferable that the solvent stored in the reservoir (20) be water in which carbon dioxide dissolves well. In addition, it is preferable that the solvent in the reservoir (20) be maintained at a temperature of 10 to 50°C and a dissolved CO2 concentration of 0 to 500 mg / L so that the dissolution of carbon dioxide occurs more effectively.

[0117] The inlet (11) of the aforementioned reservoir (20) and the carbon dioxide dissolution tower (10) is connected by a solvent supply pipe (30). The solvent supply pipe (30) corresponds to a conduit that supplies the solvent in the reservoir (20) into the carbon dioxide dissolution tower (10), and corresponds to a conduit that branches off to the exhaust gas supply pipe (40) to be described later, so that the exhaust gas from the exhaust gas supply pipe (40) is supplied into the carbon dioxide dissolution tower (10).

[0118] A pressure pump (31) for pressurizing and transferring the solvent in the reservoir (20) at high pressure may be installed on the solvent supply pipe (30). This pressure pump (31) can be implemented as a conventional liquid pump operating at an operating pressure of 3 to 30 bar, and it is particularly preferable that it be a conventional liquid pump operating at an operating pressure of 3 to 10 bar.

[0119] In this case, it is desirable to maintain the pH at 5.0 or higher by injecting an alkaline agent containing caustic soda into the solvent.

[0120] In addition, it is preferable to install a first check valve (32) on the solvent supply pipe (30) to prevent backflow of the solvent.

[0121] A flue gas supply pipe (40) is branched and connected to the aforementioned solvent supply pipe (30). The flue gas supply pipe (40) corresponds to a conduit that mixes flue gas emitted from greenhouse gas emission facilities (not shown), such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, and various processing facilities, into the solvent supply pipe (30) and supplies it into the carbon dioxide dissolution tower (10) together with the solvent flowing through the solvent supply pipe (30).

[0122] A compressor (41) for pressurizing and supplying exhaust gas may be installed in such an exhaust gas supply pipe (40). Additionally, it is preferable to install a second check valve (42) in the exhaust gas supply pipe to prevent backflow of exhaust gas.

[0123]

[0124] A multi-flow channel (50) is formed within the aforementioned carbon dioxide dissolution tower (10). FIG. 3 is an operational structure diagram of a carbon dioxide dissolution tower by a multi-flow channel in a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0125] As shown in FIG. 3, the multi-flow channel (50) induces the solvent and exhaust gas supplied into the carbon dioxide dissolution tower (10) through the solvent supply pipe (30) to flow upward in a zigzag shape, thereby dissolving the carbon dioxide in the exhaust gas into the solvent, and at the same time increases the gas-liquid reaction efficiency within the carbon dioxide dissolution tower (10) so that carbon dioxide dissolved water and purified gas are separated and produced.

[0126] These multi-flow channels (50) are formed to create flow resistance in the vertical direction within the carbon dioxide dissolution tower (10) so as to significantly reduce the rising speed of the exhaust gas and solvent. In particular, it is preferable that a first flow channel forming plate (51) fixed to one side of the interior of the carbon dioxide dissolution tower (10) and extending to the other side, and a second flow channel forming plate (52) fixed to the other side of the interior of the carbon dioxide dissolution tower (10) and extending to one side, are arranged alternately spaced apart in the vertical direction.

[0127] At this time, in order to further increase the gas-liquid reaction efficiency of the exhaust gas and solvent, the first flow channel forming plate (51) and the first flow channel forming plate (52) are formed as corrugated plates that form flow resistance in the left and right directions.

[0128] In order to control the operation of a carbon dioxide dissolution device in exhaust gas according to an embodiment of the present invention, including the operation control of the aforementioned first control valve (12a) and second control valve (13a), various items (control parameters) need to be monitored. FIG. 2 is a diagram showing the main monitoring items of a carbon dioxide dissolution device in exhaust gas according to an embodiment of the present invention.

[0129] In order to control the operation of a carbon dioxide dissolution device in exhaust gas according to one embodiment of the present invention, including the operation control of the aforementioned first control valve (12a) and second control valve (13a), various items (control parameters) need to be monitored.

[0130] In order to control the operation of the carbon dioxide dissolution device in flue gas according to one embodiment of the present invention, as shown in FIG. 2, the flow rate, temperature, pH, alkalinity, concentration of dissolved carbon dioxide (CO2), and the operating pressure of the pressure pump (31) of the solvent to be supplied into the carbon dioxide dissolution tower (10) through the solvent supply pipe (30) after being stored in the reservoir (20) are monitored, for example, through sensing, measurement, and setting by a sensor.

[0131] In addition, the flow rate, temperature, composition of the exhaust gas, the fraction of carbon dioxide (CO2) in the exhaust gas, and the pressure of the compressor (41) flowing in through the exhaust gas supply pipe (40) need to be monitored, for example, through sensing, measurement, and setting by a sensor.

[0132] In addition, the internal pressure of the carbon dioxide dissolution tower (10) needs to be monitored, for example, through sensing, measurement, setting, etc. by a sensor, and the temperature, pH, alkalinity, and dissolved CO2 concentration of the carbon dioxide dissolved water discharged through the outlet (12) of the carbon dioxide dissolution tower (10) need to be monitored, for example, through sensing, measurement, setting, etc. by a sensor.

[0133] In addition, the flow rate, temperature, composition of the purified gas, and the fraction of CO2 in the purified gas exhausted through the exhaust port (13) of the carbon dioxide dissolution tower (10) need to be monitored, for example, through sensing, measurement, and setting by a sensor.

[0134] Meanwhile, a device for dissolving carbon dioxide in exhaust gas according to one embodiment of the present invention may further include an exhaust gas injector (60) according to the embodiment. FIG. 4 is an operational structure diagram of an exhaust gas injector in a device for dissolving carbon dioxide in exhaust gas according to one embodiment of the present invention, and FIG. 5 is a design example diagram of an exhaust gas injector in a device for dissolving carbon dioxide in exhaust gas according to one embodiment of the present invention.

[0135] The exhaust gas injector (60) is installed at the connection point between the solvent supply pipe (30) and the exhaust gas supply pipe (40) and serves to mix the exhaust gas from the exhaust gas supply pipe (40) with the solvent flowing through the solvent supply pipe (30) and supply it into the carbon dioxide dissolution tower (10). In particular, it is preferable that the exhaust gas is automatically mixed by the negative pressure formed by the orifice flow of the solvent, and that the amount of exhaust gas mixed automatically increases as the flow speed of the solvent increases.

[0136] As shown in FIG. 4, the exhaust gas injector (60) includes an orifice in which the throttling part (61) and the expansion part (62) are connected in a straight line in the direction of exhaust gas supply, and at this time, it is preferable that the exhaust gas supply pipe (40) be connected vertically to the connection point between the throttling part (61) and the expansion part (62) of the exhaust gas injector (60).

[0137] In addition, as shown in FIG. 5, the flue gas injector (60) can have its cross-sectional area gradually reduced at an angle of 30° by throttling by the throttling section (61) so that the flow velocity of the solvent increases rapidly, and its cross-sectional area gradually expanded at an angle of 15° by expanding by the expansion section (62) so that the flow velocity of the solvent decreases relatively rapidly.

[0138] FIG. 6 is a correlation table between the dissolved carbon dioxide saturation rate and the carbon dioxide gas injection rate according to the operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention, and FIG. 7 is a simulated correlation graph between the dissolved carbon dioxide saturation rate and the carbon dioxide gas injection rate according to the operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0139] According to Figures 6 and 7, when the carbon dioxide (CO2) fraction in the flue gas is 50%, 100%, 150%, 200%, 250%, and 300%, respectively, under standard conditions of 25°C and 1 atm pressure and conditions where the solvent is water, it can be seen that the injection rates of carbon dioxide (CO2) gas correspond to 0.37, 0.74, 1.11, 1.48, 1.85, and 2.22 L_CO2 / L_water, respectively.

[0140] According to FIGS. 6 and 7, it can be seen that the dissolved carbon dioxide saturation rate and the carbon dioxide gas injection rate are in a proportional relationship when operating the carbon dioxide dissolution device in flue gas according to one embodiment of the present invention, and it can be seen that when the dissolved carbon dioxide saturation rate when operating the carbon dioxide dissolution device in flue gas according to one embodiment of the present invention reaches a supersaturated condition of 300%, more than twice the amount of carbon dioxide (CO2) gas can be dissolved in 1 L of water.

[0141] FIG. 8 is a graph showing the change in pH of the carbon dioxide dissolved water according to the continuous operation of the carbon dioxide dissolving device in flue gas according to one embodiment of the present invention, FIG. 9 is a graph showing the change in total alkalinity of the carbon dioxide dissolved water according to the continuous operation of the carbon dioxide dissolving device in flue gas according to one embodiment of the present invention, and FIG. 10 is a graph showing the change in dissolved carbon dioxide concentration in the carbon dioxide dissolved water according to the continuous operation of the carbon dioxide dissolving device in flue gas according to one embodiment of the present invention.

[0142] According to FIGS. 8, 9 and 10, while not adjusting the pH of the carbon dioxide dissolving water or controlling it to 5.0, 6.0, or 7.0, and maintaining the pressure of the pressurizing pump (21) at 7.0 bar and the internal pressure of the carbon dioxide dissolving tower (10) at 4.0 bar, the dissolving characteristics of carbon dioxide (CO2) according to one embodiment of the present invention were analyzed while continuously operating the device for dissolving carbon dioxide in flue gas for 30 minutes. As a result, it was found that as carbon dioxide (CO2) in the flue gas was continuously dissolved over time, the total alkalinity of the carbon dioxide (CO2) dissolving water increased.

[0143] In particular, it can be seen that when the carbon dioxide dissolution device in flue gas according to one embodiment of the present invention is operated continuously for 30 minutes under conditions where the pH of the carbon dioxide dissolution water is controlled to 6.0 or 7.0, the concentration of dissolved carbon dioxide (CO2) in the carbon dioxide dissolution water reaches 4,000 mg / L or more.

[0144] FIG. 11 is a graph showing the change in pH of the effluent from a carbon dioxide dissolution tower during long-term continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention, FIG. 12 is a graph showing the change in water temperature of the effluent from a carbon dioxide dissolution tower during long-term continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention, FIG. 13 is a graph showing the change in dissolved carbon dioxide concentration in the effluent from a carbon dioxide dissolution tower during continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention, and FIG. 14 is a graph showing the incremental change in dissolved carbon dioxide concentration in the effluent from a carbon dioxide dissolution tower during continuous operation of a carbon dioxide dissolution device in flue gas according to one embodiment of the present invention.

[0145] FIGS. 11, 12, 13, and 14 are examples of analyzing the characteristics of the CO2 dissolution tower effluent water when a device for dissolving carbon dioxide in flue gas according to one embodiment of the present invention is continuously operated for 3 hours while maintaining the flow rate of the circulating water at 100 L / min, the flow rate of the flue gas at 10 L / min, the pH of the circulating water at 7.0, the pressure of the pressurizing pump (31) at 7.0 bar, and the internal pressure of the carbon dioxide dissolution tower (10) at 4.0 bar, and continuously circulating and supplying the carbon dioxide dissolution water discharged from the outlet (12). The pH of the CO2 dissolution water was maintained at 7.0, and the results of analyzing the characteristics of the effluent water discharged from the carbon dioxide dissolution tower (10), that is, the carbon dioxide dissolution water discharged from the outlet (12), are shown in FIGS. 11, 12, 13, and 14.

[0146] In this case, the temperature of the effluent discharged from the carbon dioxide dissolution tower (10), that is, the carbon dioxide dissolution water discharged from the outlet (12), continuously rises and reaches 38°C after 3 hours, and the concentration of dissolved carbon dioxide (CO2) in the carbon dioxide dissolution water reaches a maximum of 10,000 mg / L, and it can be seen that all the carbon dioxide (CO2) components in the flue gas are dissolved until the continuous operation time reaches 105 minutes, but when 105 minutes are exceeded, the additional carbon dioxide (CO2) dissolved decreases rapidly.

[0147]

[0148] Meanwhile, a method for dissolving carbon dioxide in flue gas according to one embodiment of the present invention is achieved by providing a method for dissolving carbon dioxide in flue gas comprising: a first step of mixing flue gas discharged from a greenhouse gas emission facility with a solvent and supplying it to the lower part of a carbon dioxide dissolution tower (10); a second step of separating the solvent and flue gas supplied into the carbon dioxide dissolution tower (10) into carbon dioxide dissolved water and purified gas by transferring them to the upper part through a multi-flow channel (50) formed in the carbon dioxide dissolution tower (10) and bringing them into gas-liquid contact; and a third step of separating and discharging the carbon dioxide dissolved water and purified gas from the upper part of the carbon dioxide dissolution tower (10).

[0149] At this time, in the first step, the incorporation of the solvent into the exhaust gas is preferably carried out by an exhaust gas injector (60) that includes an orifice that allows the solvent to be incorporated between the throttling and expansion of the exhaust gas.

[0150] In addition, in the second stage, it is preferable that the multi-flow channel (50) be formed by arranging a first flow channel forming plate (51) fixed to one side inside the carbon dioxide dissolution tower (10) and extending to the other side, and a second flow channel forming plate (52) fixed to the other side inside the carbon dioxide dissolution tower (10) and extending to one side, so as to be alternately spaced apart in the vertical direction.

[0151] In addition, in the third stage, the separation and discharge of carbon dioxide dissolved water and purified gas can be achieved by positioning the purified gas at the top of the carbon dioxide dissolved water within the carbon dioxide dissolution tower (10) due to the difference in specific gravity between the liquid and the gas.

[0152] As described above, in the case of the apparatus and method for dissolving carbon dioxide in flue gas according to one embodiment of the present invention, carbon dioxide contained in flue gas emitted from greenhouse gas emission facilities such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, and various processing facilities is not captured and removed based on an adsorbent such as an amine-based adsorbent, but rather dissolved at a high concentration with only a short gas-liquid contact time by utilizing water as a solvent based on the characteristic of carbon dioxide having excellent solubility in water. This allows for reducing the economic cost required for carbon dioxide capture and removal targeting greenhouse gas emission facilities and simultaneously increasing energy efficiency.

[0153] In addition, the device and method for dissolving carbon dioxide in flue gas according to one embodiment of the present invention described above has aspects similar in principle to the water-scrubbing technology, which is utilized as one of the biogas purification technologies in terms of gas-liquid contact. However, unlike the conventional water-scrubbing method, which operates in a counter-flow manner while supplying flue gas from the bottom to the top and water from the top to the bottom, the flue gas and water are supplied simultaneously in the bottom direction and operated in a parallel flow manner. Furthermore, a flue gas injector (60) designed to automatically mix flue gas through an orifice according to the flow of the solvent for the inflow of flue gas is installed, and a multi-flow channel (50) is formed inside to maximize gas-liquid contact efficiency, thereby reducing the cost required to recover carbon dioxide to, for example, 30 dollars / ton_CO2 or less, which can dramatically increase the efficiency and versatility of carbon capture and utilization (CCU).

[0154]

[0155] FIG. 15 is an overall configuration diagram of a dissolved carbon dioxide degassing device utilizing a porous degassing agent according to one embodiment of the present invention, and FIG. 16 is a diagram showing the main monitoring items of a dissolved carbon dioxide degassing device utilizing a porous degassing agent according to one embodiment of the present invention.

[0156] A degassing device for dissolved carbon dioxide using a porous degassing agent according to one embodiment of the present invention includes a degassing tower (110), a dissolved water supply pipe (120), a porous degassing agent (130), a degassing water discharge pipe (140), and a carbon dioxide exhaust pipe (150), as shown in FIGS. 15 and 16.

[0157] The degassing tower (110) is a type of degassing reaction tower that degass carbon dioxide gas from carbon dioxide dissolved water generated when carbon dioxide contained in the flue gas is dissolved in the solvent by gas-liquid reaction between a solvent, such as water, and flue gas supplied from a greenhouse gas emission facility (not shown), such as a cement manufacturing facility, a power plant, a steel industry facility, a refining and chemical process facility, an environmental infrastructure facility, various manufacturing facilities, various processing facilities, etc., and as shown in FIGS. 15 and 16, it is preferable to have a cylindrical (column) shape, but depending on the embodiment, it can also be formed in other shapes including a rectangular prism, a hexagonal prism, an octagonal prism, an elliptical prism, etc.

[0158] A drain pipe (111) is connected to the bottom of the degassing tower (110). The drain pipe (111) is a conduit that discharges residual water from inside the degassing tower (110) downward by gravity during internal cleaning, and it is preferable to install a drain valve (112).

[0159] In addition, as shown in FIG. 16, it is preferable that an internally visible monitoring window (113) be formed extending vertically on the upper side of the degassing tower (110). It is preferable that the monitoring window (113) be extended to the lower position of the upper rectification plate (170), which will be described later, so that the state of separation and discharge of degassed water and carbon dioxide from the upper position of the upper rectification plate (170) can be monitored visually.

[0160] A dissolving water supply pipe (120) is connected to the lower side of the aforementioned degassing tower (110). The dissolving water supply pipe (120) corresponds to a conduit through which carbon dioxide dissolving water is supplied by gas-liquid reaction between a solvent, such as water, and flue gas discharged from a greenhouse gas emission facility (not shown), such as a cement manufacturing facility, a power plant, a steel industry facility, an oil refining and chemical process facility, an environmental infrastructure facility, various manufacturing facilities, and various processing facilities. The aforementioned degassing tower (110) is connected to a carbon dioxide dissolving tower, such as a solvent like water, and flue gas undergoing a gas-liquid reaction.

[0161] It is preferable that the dissolved carbon dioxide water supplied through the dissolved water supply pipe (120) has a high concentration of dissolved carbon dioxide (CO2) with a concentration of 500 mg / L or more and a pH of 5.0 or less. In addition, it is preferable that the dissolved carbon dioxide water supplied through the dissolved water supply pipe (120) be introduced through an inline mixer (121) that forms a physical vortex, and in this case, it is preferable that the inline mixer (121) be formed as a static mixer equipped with a spiral member for forming turbulence inside.

[0162] In addition, a supply valve (122) is installed in the dissolution water supply pipe (120) to control whether and to what extent the carbon dioxide dissolution water is supplied. In addition, it is preferable that the carbon dioxide dissolution water be supplied through the dissolution water supply pipe (120) at an operating pressure of 1 to 3 bar, and this operating pressure corresponds to the operating pressure of the carbon dioxide dissolution tower or the operating pressure of the pressure pump of the degassed water discharge pipe (140) to be described later.

[0163] A porous degassing agent (130) is provided inside the aforementioned degassing tower (110). The porous degassing agent (130) serves to degas carbon dioxide from the carbon dioxide dissolved water by increasing the contact area and contact time with the carbon dioxide dissolved water introduced into the degassing tower (110), and is formed by filling a porous carrier capable of degassing carbon dioxide in a column shape.

[0164] It is preferable that such a porous degasser (130) be supported by a perforated support plate (131) installed on the lower inner side of the degasser tower (110). It is preferable that the perforated support plate (131) be formed as a plate of a certain thickness to provide supporting strength for supporting the porous carrier from below, and that a number of through holes be formed across the entire surface so that the carbon dioxide dissolved water is uniformly dispersed and provided as a porous degasser (130). The perforated support plate (131) also serves to prevent the lower loss of the porous degasser (130).

[0165] FIG. 17 is a drawing showing various embodiments of a porous degasser in a device for degassing dissolved carbon dioxide using a porous degasser according to one embodiment of the present invention.

[0166] The porous carrier forming the porous degassing agent (130) serves to adsorb and degas carbon dioxide molecules from water molecules, and as shown in FIG. 3, it can be formed from one or more granular bodies among activated carbon (AC), modified activated carbon impregnated with a metal salt containing iron or magnesium, zeolite, modified zeolite impregnated with a metal salt containing iron or magnesium, silicon dioxide (SiO2), modified silicon dioxide impregnated with a metal salt containing iron or magnesium, silica gel (SiO2·nH2O), modified silica gel impregnated with a metal salt containing iron or magnesium, alumina (Al2O3), modified alumina impregnated with a metal salt containing iron or magnesium, silica gel, activated carbon (AC), zeolite, and silica gel, and depending on the embodiment, an iron-zeolite (Fe-ZSM-S) catalyst, an iron-silicon dioxide (Fe-SiO2) catalyst, It can also be formed into one or more granular bodies of Mg-activated carbon (AC) catalysts.

[0167] In addition, it is preferable that the porous degassing agent (130) be filled with a bed height of 200 to 1,000 mm to have an empty bed contact time (EBCT) of 2 to 10 minutes. The empty bed contact time (EBCT) is a value obtained by dividing the amount of the porous degassing agent (130) filled by the amount of water to be treated, and the longer the empty bed contact time (EBCT), the greater the treatment efficiency. According to one embodiment, when the inflow rate of the carbon dioxide dissolved water is 100 L per minute, it is preferable that the porous degassing agent (130) be filled with a bed height of 76.4 cm to have an empty bed contact time (EBCT) of 4 minutes, and at this time, it is preferable that the total diameter of the porous degassing agent (130) be 100 cm.

[0168] At this time, the porous degasser (130) plays a role in degassing dissolved carbon dioxide in the carbon dioxide solution into a gaseous state to form microbubbles, and inducing these microbubbles to grow into large bubbles through mutual coupling and be discharged upward.

[0169] A degassed water discharge pipe (140) is connected to the upper side of the aforementioned degassed tower (110). The degassed water discharge pipe (140) corresponds to a conduit that separates and discharges to the outside the carbon dioxide degassed water formed by degassing carbon dioxide from the carbon dioxide dissolved water inside the degassed tower (110).

[0170] It is preferable that a discharge valve (141) be installed in the degassed water discharge pipe (140) to control whether and to what extent the carbon dioxide degassed water is discharged. Additionally, a pressure pump (142) may be installed downstream of the discharge valve (42) in the degassed water discharge pipe (140) to continuously circulate and reuse the carbon dioxide degassed water by pressurizing and discharging it.

[0171] A carbon dioxide exhaust pipe (150) is connected to the upper side of the aforementioned degassing tower (110). The carbon dioxide exhaust pipe (150) corresponds to a conduit that allows carbon dioxide degassed from the carbon dioxide dissolved water to be exhausted to the outside and separated and collected.

[0172] It is preferable that an exhaust valve (151) be installed in such a carbon dioxide exhaust pipe (150) to control whether carbon dioxide is exhausted and the degree of exhaust.

[0173] It is preferable that a lower rectifier plate (160) having a plurality of holes is installed spaced apart from the lower side of the porous degasser (130) within the aforementioned degasser tower (110), and an upper rectifier plate (170) having a plurality of holes is installed spaced apart from the upper side of the porous degasser (130) within the degasser tower (110).

[0174] The lower baffle plate (160) serves to induce the carbon dioxide dissolved water introduced into the degassing tower (110) through the dissolved water supply pipe (20) to be evenly dispersed over the entire area of ​​the porous degassing agent (130), and the upper baffle plate (170) not only reduces the occurrence of drift of the carbon dioxide dissolved water flowing through the porous degassing agent (130) so that the carbon dioxide can be easily degassed, but also serves to prevent the upper flow of the porous degassing agent (130).

[0175] The lower rectifier plate (160) is fixedly coupled within the degassing tower (110), but the upper rectifier plate (170) is preferably detachably coupled within the degassing tower (110) for the purpose of replacing the porous degassing agent (130).

[0176] In order to control the operation of a dissolved carbon dioxide degassing device utilizing a porous degassing agent according to one embodiment of the present invention, various items (control parameters) need to be monitored.

[0177] In order to control the operation of a degassing device for dissolved carbon dioxide using a porous degassing agent according to one embodiment of the present invention, as shown in FIG. 16, the amount of dissolved carbon dioxide water to be introduced into the degassing tower (110) through the dissolved water supply pipe (120), water temperature, pH, alkalinity, and concentration of dissolved carbon dioxide (CO2) need to be monitored, for example, through sensing, measurement, and setting by a sensor.

[0178] In addition, the amount of carbon dioxide (CO2) gas flowing out through the carbon dioxide exhaust pipe (150) and the concentration of carbon dioxide (CO2) need to be monitored, for example, through sensing, measurement, and setting by a sensor.

[0179] In addition, the pH, alkalinity, and dissolved carbon dioxide (CO2) concentration of the degassed water drained through the degassed water drain pipe (140) need to be monitored, for example, through sensing, measurement, and setting by a sensor.

[0180] It is preferable that a vacuum pump (180) be installed on the aforementioned carbon dioxide exhaust pipe (150). The vacuum pump (180) creates a vacuum state (e.g., 0.1 bar or less) at the top of the degassing tower (110) to further increase the degassing efficiency, and can be formed as a conventional exhaust pump.

[0181] It is desirable that such vacuum pumps be operated at an operating pressure of 0.01 to 1.0 bar, particularly at an operating pressure of 0.1 bar or less.

[0182] FIG. 17 is a drawing showing various embodiments of a porous degasser in a device for degassing dissolved carbon dioxide using a porous degasser according to one embodiment of the present invention.

[0183] FIG. 18 is a graph showing the pH characteristics of degassed water according to the type of porous degasser in a degassed carbon dioxide device utilizing a porous degasser according to one embodiment of the present invention.

[0184] Figure 18 shows the results when approximately 55.4 g / L of a degassing agent is added to a carbon dioxide (CO2) solution with a dissolved carbon dioxide (CO2) concentration of approximately 1,200 mg / L. According to Figure 18, it can be seen that the pH of the high-concentration carbon dioxide (CO2) solution is generally around 5.0 or lower when introduced, and then the pH rises as the dissolved carbon dioxide (CO2) is degassed.

[0185] In particular, the pH increase of the activated carbon series (Mg-AC) is significant, and the greater the pH increase, the higher the degassing efficiency. Therefore, it can be seen that a porous degassing agent (130) of the activated carbon and zeolite series, which possesses a large number of fine pores, is desirable as a degassing agent for high-concentration carbon dioxide dissolved water. For reference, the degassing efficiency can be improved by controlling the distribution of micropores, specific surface area, and hydrophilicity of the porous degassing agent (130).

[0186] FIG. 19 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water according to the type of porous degasser in a degassed device for dissolved carbon dioxide using a porous degasser according to one embodiment of the present invention.

[0187] According to FIG. 19, the degassing efficiency of dissolved carbon dioxide (CO2) for porous degassing agent (30) with the same amount (dissolved carbon dioxide (CO2) concentration of about 1,200 mg / L and degassing agent input of about 55.4 g / L) was analyzed, and it was found that Fe-SiO2, Mg-AC (activated carbon modified with Mg), and activated carbon, which contain a large amount of micropores, have excellent degassing efficiency.

[0188] FIG. 20 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water according to the amount of activated carbon and operating time in a degassed water device using a porous degasser according to one embodiment of the present invention, and FIG. 21 is a graph showing the characteristics of dissolved carbon dioxide (CO2) concentration in degassed water according to the contact time with activated carbon in a degassed water device using a porous degasser according to one embodiment of the present invention.

[0189] According to Figures 20 and 21, as the amount of activated carbon increased, the concentration of dissolved carbon dioxide (CO2) in the degassed water decreased, and it can be seen that stable degass efficiency can be achieved when the contact time (EBCT) of the activated carbon is 4 minutes or more.

[0190] FIG. 22 is a graph showing the characteristics of the dissolved carbon dioxide (CO2) concentration in the degassed water when a vacuum pump is not installed in the carbon dioxide exhaust pipe in a degassed water device utilizing a porous degasser according to one embodiment of the present invention, and FIG. 9 is a graph showing the characteristics of the dissolved carbon dioxide (CO2) concentration in the degassed water when a vacuum pump is installed in the carbon dioxide exhaust pipe in a degassed water device utilizing a porous degasser according to one embodiment of the present invention.

[0191] According to FIGS. 22 and 23, it can be seen that the degassing efficiency is better when the vacuum pump (80) is operated to maintain the internal operating pressure at 0.1 bar than when the vacuum pump (80) is not operated.

[0192] FIG. 24 is a graph showing the pH characteristics of degassed water during continuous operation of a degassed water device using a porous degasser according to one embodiment of the present invention, and FIG. 25 is a graph showing the dissolved carbon dioxide (CO2) concentration characteristics of degassed water during continuous operation of a degassed water device using a porous degasser according to one embodiment of the present invention.

[0193] According to FIGS. 24 and 25, it can be seen that a degassing device for dissolved carbon dioxide utilizing a porous degassing agent according to one embodiment of the present invention maintains a continuously stable degassing efficiency even when operated continuously. In addition, it can be seen that the pH of the degassed water continuously increases while the concentration of carbon dioxide (CO2) decreases.

[0194] Meanwhile, a method for degassing carbon dioxide in flue gas according to one embodiment of the present invention comprises: a 11th step of introducing carbon dioxide dissolved water into a degassing tower; a 12th step of distributing carbon dioxide dissolved water evenly across the entire inner surface of the degassing tower; a 13th step of bringing carbon dioxide dissolved water into contact with a porous degassing agent filled inside the degassing tower; a 14th step of degassing dissolved carbon dioxide into a gaseous state to form microbubbles; a 15th step of causing the microbubbles to grow into giant bubbles through mutual coupling and rise and discharge; and a 16th step of capturing and recovering the carbon dioxide gas that is degassed from the carbon dioxide dissolved water and rises and discharges.

[0195] As described above, in the case of the device and method for degassing dissolved carbon dioxide using a porous degassing agent according to one embodiment of the present invention, dissolved carbon dioxide is degassed and recovered from carbon dioxide dissolved water in which carbon dioxide contained in flue gas emitted from greenhouse gas emission facilities such as cement manufacturing facilities, power plants, steel industry facilities, oil refining and chemical process facilities, environmental infrastructure facilities, various manufacturing facilities, and various processing facilities is dissolved through a solvent. By distributing the carbon dioxide dissolved water evenly across the front of the degassing tower (110) and bringing it into contact with the porous degassing agent (130) filled inside the degassing tower (110), the dissolved carbon dioxide is degassed into a gaseous state to form microbubbles, which then grow into large bubbles through mutual bonding and rise and are discharged, thereby allowing the carbon dioxide gas to be captured and recovered. As a result, the dissolved carbon dioxide from the carbon dioxide dissolved water can be degassed and recovered with high efficiency, while simultaneously reducing the economic cost required for carbon dioxide capture and removal for greenhouse gas emission facilities and increasing energy efficiency.

[0196] In addition, the device and method for degassing dissolved carbon dioxide using a porous degassing agent according to the present invention share similarities in principle with the water-scrubbing technology, which is utilized as a biogas purification technology, in terms of gas-liquid contact. However, unlike the conventional water-scrubbing method, it aims for carbon capture rather than carbon removal or methane purification; therefore, it not only secures high degassing efficiency but also enables the entire amount of carbon dioxide to be recovered without being released into the atmosphere during this process.

[0197] Although the present invention has been described in detail above with reference to embodiments, it is obvious to those skilled in the art that various modifications and variations are possible within the scope of the technical spirit of the invention, and such modifications and variations are naturally included in the appended claims.

[0198] In addition, the explanation of the drawing symbols shown in the drawings is as follows.

[0199] 10: Carbon dioxide dissolution tower, 11: Inlet, 12: Outlet, 12a: First control valve, 13: Exhaust port, 13a: Second control valve, 20: Water tank, 30: Solvent supply pipe, 31: Pressure pump, 32: First check valve, 40: Flue gas supply pipe, 41: Compressor, 42: Second check valve, 50: Multi-flow channel, 51: First flow channel forming plate, 52: Second flow channel forming plate, 60: Flue gas injector, 61: Throttling section, 62: Expansion section, 110: Degassing tower, 111: Drain pipe, 112: Drain valve, 113: Monitoring window, 120: Dissolution water supply pipe, 121: Inline mixer, 122: Supply valve, 130: Porous degassing agent, 131: perforated support plate, 140: degassed water discharge pipe, 141: discharge valve, 142: pressure pump, 150: carbon dioxide exhaust pipe, 151: exhaust valve, 160: lower rectifier plate, 170: upper rectifier plate, 180: vacuum pump.

Claims

1. A carbon dioxide dissolution tower having an inlet on one side, an outlet for discharging dissolved carbon dioxide water on the other side, and an exhaust port for discharging purified gas on the upper side; A reservoir in which a solvent is stored internally; A solvent supply pipe connecting the above reservoir and the inlet of the above carbon dioxide dissolution tower and supplying the solvent in the above reservoir into the above carbon dioxide dissolution tower; A flue gas supply pipe branched to the solvent supply pipe and supplying flue gas discharged from a greenhouse gas emission facility into the solvent supply pipe; and A device for dissolving carbon dioxide in flue gas comprising a multi-flow channel formed within the carbon dioxide dissolution tower and configured to induce the carbon dioxide in the flue gas to dissolve in the solvent by inducing the solvent supplied into the carbon dioxide dissolution tower through the solvent supply pipe and the flue gas to flow upward in a zigzag shape, thereby separating and generating the carbon dioxide dissolved water and the purified gas.

2. In Claim 1, A device for dissolving carbon dioxide in flue gas, characterized in that the solvent is water.

3. In claim 1 or claim 2, A device for dissolving carbon dioxide in flue gas, characterized by maintaining the pH at 5.0 or higher by injecting an alkaline agent containing caustic soda into the solvent.

4. In claim 1 or claim 2, A device for dissolving carbon dioxide in flue gas, characterized in that the carbon dioxide dissolution tower above has a rectangular prism or cylindrical shape.

5. In claim 1 or claim 2, A device for dissolving carbon dioxide in flue gas, characterized in that the inlet is provided at the lower part of one side of the carbon dioxide dissolution tower and the outlet is provided at the upper part of the other side of the carbon dioxide dissolution tower.

6. In claim 1 or claim 2, A device for dissolving carbon dioxide in flue gas, characterized in that a first control valve for controlling the outflow amount of the carbon dioxide dissolved water is installed at the outlet, and a second control valve for controlling the discharge amount of the purified gas is installed at the exhaust port.

7. In Claim 1 or Claim 2, A device for dissolving carbon dioxide in flue gas, characterized in that the solvent in the above reservoir is maintained at a temperature of 10 to 50°C and a dissolved CO2 concentration of 0 to 500 mg / L.

8. In claim 1 or claim 2, A device for dissolving carbon dioxide in flue gas, characterized by having a pressure pump installed on the solvent supply pipe to pressurize and transfer the solvent in the reservoir at high pressure.

9. In Claim 8, A device for dissolving carbon dioxide in flue gas, characterized in that the above-mentioned pressure pump operates at an operating pressure of 3 to 30 bar.

10. In claim 1 or claim 2, A device for dissolving carbon dioxide in exhaust gas, characterized by having a first check valve installed on the solvent supply pipe to prevent backflow of the solvent.

11. In claim 1 or claim 2, A device for dissolving carbon dioxide in exhaust gas, characterized in that a compressor for pressurizing and supplying the exhaust gas is installed in the exhaust gas supply pipe.

12. In claim 1 or claim 2, A device for dissolving carbon dioxide in exhaust gas, characterized in that a second check valve is installed in the exhaust gas supply pipe to prevent backflow of the exhaust gas.

13. In claim 1 or claim 2, A device for dissolving carbon dioxide in flue gas, characterized in that the multi-flow channel is formed by alternately spaced arrangement of a first flow channel forming plate fixed to one side inside the carbon dioxide dissolution tower and extending to the other side, and a second flow channel forming plate fixed to the other side inside the carbon dioxide dissolution tower and extending to one side.

14. In Claim 13, A device for dissolving carbon dioxide in exhaust gas, characterized in that the first flow channel forming plate and the second flow channel forming plate are formed as corrugated plates.

15. A carbon dioxide dissolution tower having an inlet on one side, an outlet for discharging dissolved carbon dioxide water on the other side, and an exhaust port for discharging purified gas on the upper side; A reservoir in which a solvent is stored internally; A solvent supply pipe connecting the above reservoir and the inlet of the above carbon dioxide dissolution tower and supplying the solvent in the above reservoir into the above carbon dioxide dissolution tower; A flue gas supply pipe branched to the above solvent supply pipe and supplying flue gas discharged from a greenhouse gas emission facility into the above solvent supply pipe; A multi-flow channel formed within the carbon dioxide dissolution tower and inducing the solvent and the exhaust gas supplied into the carbon dioxide dissolution tower through the solvent supply pipe to flow upward in a zigzag shape so that the carbon dioxide in the exhaust gas dissolves in the solvent, thereby separating and generating the carbon dioxide dissolved water and the purified gas; and A device for dissolving carbon dioxide in flue gas, comprising a flue gas injector installed at the connection point between the solvent supply pipe and the flue gas supply pipe, so that the flue gas of the flue gas supply pipe is mixed with the solvent flowing through the solvent supply pipe and supplied into the carbon dioxide dissolution tower.

16. In Claim 15, A device for dissolving carbon dioxide in flue gas, characterized in that the solvent is water.

17. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized by maintaining the pH at 5.0 or higher by injecting an alkaline agent containing caustic soda into the solvent.

18. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized in that the carbon dioxide dissolution tower above has a rectangular prism or cylindrical shape.

19. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized in that the inlet is provided at the lower part of one side of the carbon dioxide dissolution tower and the outlet is provided at the upper part of the other side of the carbon dioxide dissolution tower.

20. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized in that a first control valve for controlling the outflow amount of the carbon dioxide dissolved water is installed at the outlet, and a second control valve for controlling the discharge amount of the purified gas is installed at the exhaust port.

21. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized in that the solvent in the above reservoir is maintained at a temperature of 10 to 50°C and a dissolved CO2 concentration of 0 to 500 mg / L.

22. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized by having a pressure pump installed on the solvent supply pipe to pressurize and transfer the solvent in the reservoir at high pressure.

23. In Claim 22, A device for dissolving carbon dioxide in flue gas, characterized in that the above-mentioned pressure pump operates at an operating pressure of 3 to 30 bar.

24. In claim 15 or claim 16, A device for dissolving carbon dioxide in exhaust gas, characterized by having a first check valve installed on the solvent supply pipe to prevent backflow of the solvent.

25. In claim 15 or claim 16, A device for dissolving carbon dioxide in exhaust gas, characterized in that a compressor for pressurizing and supplying the exhaust gas is installed in the exhaust gas supply pipe.

26. In claim 15 or claim 16, A device for dissolving carbon dioxide in exhaust gas, characterized in that a second check valve is installed in the exhaust gas supply pipe to prevent backflow of the exhaust gas.

27. In claim 15 or claim 16, A device for dissolving carbon dioxide in flue gas, characterized in that the multi-flow channel is formed by alternately spaced arrangement of a first flow channel forming plate fixed to one side inside the carbon dioxide dissolution tower and extending to the other side, and a second flow channel forming plate fixed to the other side inside the carbon dioxide dissolution tower and extending to one side.

28. In Claim 27, A device for dissolving carbon dioxide in exhaust gas, characterized in that the first flow channel forming plate and the second flow channel forming plate are formed as corrugated plates.

29. In claim 15 or claim 16, A device for dissolving carbon dioxide in exhaust gas, characterized in that the exhaust gas injector includes an orifice in which a throttling part and an expanding part are connected in alignment in the direction of supply of the exhaust gas, and the exhaust gas supply pipe is connected in alignment with the point of connection of the throttling part and the expanding part.

30. In Claim 27, A device for dissolving carbon dioxide in exhaust gas, characterized in that the cross-sectional area of ​​the throttling portion of the exhaust gas injector is gradually reduced at an angle of 20 to 60° and the cross-sectional area of ​​the expanding portion of the exhaust gas injector is expanded at an angle of 10 to 30°, and the angle of the expanding portion is smaller than the angle of the throttling portion.

31. A first step of mixing exhaust gas emitted from a greenhouse gas emission facility into a solvent and supplying it to the bottom of a carbon dioxide dissolution tower; A second step of separating the solvent and flue gas supplied into the carbon dioxide dissolution tower into carbon dioxide dissolved water and purified gas by transferring them upward through a multi-flow channel formed in the carbon dioxide dissolution tower and bringing them into gas-liquid contact; and A method for dissolving carbon dioxide in flue gas, comprising a third step of separating and discharging the carbon dioxide dissolved water and the purified gas from the top of the carbon dioxide dissolution tower.

32. In Claim 29, In the first step above, the mixing of the solvent into the exhaust gas is carried out by an exhaust gas injector including an orifice that automatically mixes the exhaust gas by the negative pressure formed by the orifice flow of the solvent, and A method for dissolving carbon dioxide in flue gas, characterized in that, in the second step above, the multi-flow channel is formed by alternately arranging a first flow channel forming plate fixed to one side inside the carbon dioxide dissolution tower and extending to the other side, and a second flow channel forming plate fixed to the other side inside the carbon dioxide dissolution tower and extending to one side.

33. Degas Tower; A dissolution water supply pipe connected to the lower or upper side of the above degassing tower and supplied with carbon dioxide dissolution water; A porous degassing agent formed by filling a porous carrier in a column shape inside the above degassing tower and increasing the contact area and contact time with the carbon dioxide dissolved water to degas carbon dioxide; A degasification water discharge pipe connected to the upper or lower side of the above degasification tower and discharging carbon dioxide degasification water formed by degassing carbon dioxide from the carbon dioxide dissolved water; and A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, comprising a carbon dioxide exhaust pipe connected to the upper side of the above degassing tower and exhausting carbon dioxide degassed from the carbon dioxide dissolved water.

34. In Claim 33, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized by further including a lower rectification plate installed spaced apart from the lower side of the porous degassing agent within the degassing tower and having a plurality of holes formed therein.

35. In Claim 33, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized by further including an upper rectification plate installed spaced apart from the upper side of the porous degassing agent within the degassing tower and having a plurality of holes formed therein.

36. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the above-mentioned degassing tower is formed in a cylindrical or rectangular column shape.

37. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide using a porous degassing agent, characterized in that an internal viewing window is formed extending vertically on the upper side of the above degassing tower.

38. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that an inline mixer is installed on the above-mentioned dissolved water supply pipe, and the inline mixer is formed as a static mixer equipped with a spiral member for forming turbulence inside.

39. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the dissolved carbon dioxide water is supplied through the dissolved water supply pipe at an operating pressure of 1 to 3 bar.

40. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the porous degassing agent is supported by a perforated support plate installed on the lower inner side of the degassing tower.

41. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the porous carrier forming the porous degassing agent is formed from one or more granular bodies selected from activated carbon (AC), modified activated carbon impregnated with a metal salt containing iron or magnesium, zeolite, modified zeolite impregnated with a metal salt containing iron or magnesium, silicon dioxide (SiO2), modified silicon dioxide impregnated with a metal salt containing iron or magnesium, silica gel (SiO2·nH2O), modified silica gel impregnated with a metal salt containing iron or magnesium, alumina (Al2O3), and modified alumina impregnated with a metal salt containing iron or magnesium.

42. In any one of claims 33 to 35, The porous carrier forming the above-mentioned porous degassing agent is nonpolar or hydrophobic, has a large number of micropores with a nanometer diameter, and has a specific surface area of ​​100 m² 2 A device for degassing dissolved carbon dioxide using a porous degassing agent characterized by having a value of / g or more.

43. In any one of claims 33 to 35, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the porous degassing agent is filled to a bed height of 200 to 1,000 mm to have an Empty Bed Contact Time (EBCT) of 2 to 10 minutes.

44. Degas Tower; A dissolution water supply pipe connected to the lower or upper side of the above degassing tower and supplied with carbon dioxide dissolution water; A porous degassing agent formed by filling a porous carrier in a column shape inside the above degassing tower and increasing the contact area and contact time with the carbon dioxide dissolved water to degas carbon dioxide; A degassed water discharge pipe connected to the upper or lower side of the above degassed tower and discharging carbon dioxide degassed water formed by degassing carbon dioxide from the carbon dioxide dissolved water; A carbon dioxide exhaust pipe connected to the upper side of the above degassing tower and exhausting carbon dioxide degassed from the carbon dioxide dissolved water; and A device for degassing dissolved carbon dioxide using a porous degassing agent including a vacuum pump installed on the above-mentioned carbon dioxide exhaust pipe.

45. In Claim 44, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized by further including a lower rectification plate installed spaced apart from the lower side of the porous degassing agent within the degassing tower and having a plurality of holes formed therein.

46. ​​In Claim 44, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized by further including an upper rectification plate installed spaced apart from the upper side of the porous degassing agent within the degassing tower and having a plurality of holes formed therein.

47. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the above-mentioned degassing tower is formed in a cylindrical or rectangular column shape.

48. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide using a porous degassing agent, characterized in that an internal viewing window is formed extending vertically on the upper side of the above degassing tower.

49. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that an inline mixer is installed on the above-mentioned dissolved water supply pipe, and the inline mixer is formed as a static mixer equipped with a spiral member for forming turbulence inside.

50. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the dissolved carbon dioxide water is supplied through the dissolved water supply pipe at an operating pressure of 1 to 3 bar.

51. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the porous degassing agent is supported by a perforated support plate installed on the lower inner side of the degassing tower.

52. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the porous carrier forming the porous degassing agent is formed from one or more granular bodies selected from activated carbon (AC), modified activated carbon impregnated with a metal salt containing iron or magnesium, zeolite, modified zeolite impregnated with a metal salt containing iron or magnesium, silicon dioxide (SiO2), modified silicon dioxide impregnated with a metal salt containing iron or magnesium, silica gel (SiO2·nH2O), modified silica gel impregnated with a metal salt containing iron or magnesium, alumina (Al2O3), and modified alumina impregnated with a metal salt containing iron or magnesium.

53. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the porous degassing agent is filled to a bed height of 200 to 1,000 mm to have an Empty Bed Contact Time (EBCT) of 2 to 10 minutes.

54. In any one of claims 44 to 45, A degassing device for dissolved carbon dioxide utilizing a porous degassing agent, characterized in that the above vacuum pump operates at an operating pressure of 0.01 to 1.0 bar.

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