Process and apparatus for producing of ammonium carbonate

Abstract

The present invention relates to a method for carbon dioxide capture based on a deep cryogenic method and a method for manufacturing ammonium carbonate using ammonia, which maximizes convenience or efficiency of use due to ease of handling, use, maintenance, and repair derived from a structure differentiated from existing ones, thereby enabling more efficient precipitation and capture of low-concentration carbon dioxide by utilizing ammonia extracted from coal and providing the captured carbon dioxide to be utilized as renewable energy, and thereby making a significant contribution in economic, social, policy, environmental, and safety aspects. The method comprises: an ammonia water recovery step (S100) for capturing ammonia generated from a thermal power plant and recovering ammonia water; a carbon dioxide capture step (S200) for precipitating and capturing carbon dioxide from combustion gas generated from a thermal power plant using a deep cryogenic method; and an ammonium carbonate manufacturing step (S300) for obtaining ammonium carbonate by reacting carbon dioxide and ammonia water in a gas-liquid reaction.

Description

Technology Field

[0001] The present invention relates to a method for effectively collecting and treating coal or combustion gases generated in a thermal power plant, and more specifically, to a method for carbon dioxide capture based on a deep cryogenic method and the production of ammonium carbonate using ammonia, which maximizes convenience of use and efficiency through ease of handling, use, maintenance, and repair derived from a structure differentiated from existing ones, by utilizing ammonia extracted from coal to more efficiently precipitate and capture low-concentration carbon dioxide and providing the captured carbon dioxide for use as renewable energy, thereby making a significant contribution in economic, social, policy, environmental, and safety aspects. Background Technology

[0003] Recently, various strategies to promote carbon neutrality are being implemented worldwide, accompanied by declarations of carbon neutrality. In Korea as well, various policies aimed at carbon neutrality are being actively pursued, and the reality is that greater efforts are being devoted, in particular, to improving thermal power plants that generate large amounts of carbon.

[0005] For example, Registered Patent Publication No. 10-0324709, titled "Pressure swing adsorption device for recovering high-purity carbon dioxide from combustion gas of a thermal power plant and method for recovering carbon dioxide using the same," is disclosed. This technology proposes a process for recovering carbon dioxide from combustion gas of a thermal power plant using activated carbon as an adsorbent. In particular, this technology implements a pressure swing adsorption device comprising an adsorption tower, a vacuum pump, a branch pipe, a pressure regulating valve, a flow regulating valve, and a product storage tank. It is configured to recover high-purity carbon dioxide by performing a circulating operation using this device, consisting of the stages of parallel flow depressurization, pressure equalization, washing with the product, and vacuum desorption.

[0006] The above-mentioned conventional technology has the economic advantage of being able to obtain a product of the desired purity with only the vacuum pump and three adsorption towers required for the vacuum process, resulting in low equipment costs and the ability to operate with only the electricity cost of one vacuum pump.

[0008] Another similar technology is disclosed in Registered Patent Publication No. 10-1445756, "Device and method for recovering carbon dioxide emitted from a chimney of a thermal power plant," and the technology comprises: a carbon dioxide dissolution tank that dissolves carbon dioxide-containing exhaust gas emitted from a chimney of a thermal power plant through water; a carbon dioxide primary replacement tank that recovers carbon dioxide by stirring the exhaust gas that has passed through the carbon dioxide dissolution tank together with water through a rotating blade; a carbon dioxide secondary replacement tank that recovers carbon dioxide by the secondarily heating of the exhaust gas that has passed through the primary replacement tank through a coil; a carbon dioxide separation tank that separates the exhaust gas that has passed through the carbon dioxide secondary replacement tank into carbon dioxide and gases other than carbon dioxide through a partition; and a carbon dioxide storage tank that stores the carbon dioxide separated through the carbon dioxide separation tank.

[0009] The above technology can recover about 95% of carbon dioxide through dissolution, stirring, exothermic, and separation processes.

[0011] However, existing technologies are exposed to the volatility, corrosiveness, and toxicity of absorbents, require a large amount of thermal energy for regeneration resulting in high operating costs, and make it difficult to obtain high concentrations of ammonium carbonate.

[0012] Therefore, the present invention proposes a new concept of technology that enables the immediate extraction of ammonia and carbon dioxide from coal and combustion gases generated in a thermal power plant, thereby allowing for more efficient processing and the acquisition of renewable energy. Prior art literature

[0014] Registered Patent Publication No. 10-0324709 "Pressure swing adsorption device for recovering high-purity carbon dioxide from combustion gas of a thermal power plant and method for recovering carbon dioxide using the same" Registered Patent Publication No. 10-1445756 "Device and method for recovering carbon dioxide emitted from the chimney of a thermal power plant" The problem to be solved

[0015] This invention was created to more actively resolve the aforementioned problems, and the main objective is to provide a technology capable of immediately collecting and effectively processing coal and combustion gases generated from thermal power plants.

[0017] In addition, another problem addressed by the present invention is to provide a capture technology that precipitates and captures carbon dioxide from combustion gases, deviating from known conventional precipitation and capture methods to achieve high efficiency at a lower cost. means of solving the problem

[0020] To achieve the above-mentioned problem, the method proposed in this invention for carbon dioxide capture based on deep cryogenics and the production of ammonium carbonate using ammonia is as follows.

[0022] The method for producing ammonium carbonate according to the present invention is characterized by comprising: an ammonia water recovery step (S100) for recovering ammonia water by capturing ammonia generated from a thermal power plant; a carbon dioxide capture step (S200) for precipitating and capturing carbon dioxide from combustion gas generated from a thermal power plant using a deep cryogenic method; and an ammonium carbonate production step (S300) for obtaining ammonium carbonate by reacting carbon dioxide and ammonia water in a gas-liquid reaction.

[0024] Additionally, the ammonia water recovery step (S100) comprises: a coal recovery step (S110) for recovering coal generated from a thermal power plant; a coal oxidation step (S120) for oxidizing coal by introducing coal into a coal gasification reactor and injecting oxygen to produce carbon monoxide and hydrogen; and an ammonia acquisition step (S130) for obtaining high-concentration ammonia water by converting carbon monoxide into hydrogen and carbon dioxide through a water reaction with steam, while simultaneously extracting and capturing ammonia.

[0026] Additionally, the carbon dioxide capture step (S200) comprises: a combustion gas collection step (S210) in which combustion gas generated in a thermal power plant is collected and stored using a set injection tank (100) and the collected combustion gas is injected into a capture facility (200) upon request; and a carbon dioxide precipitation step (S220) in which solid carbon dioxide is captured by cooling and precipitating the combustion gas through a deep cryogenic-based cooling means mounted on the capture facility.

[0028] Additionally, the carbon dioxide precipitation step (S220) comprises: a combustion gas pre-cooling step (S221) for reducing the temperature of the combustion gas through a first heat exchanger (221); a combustion gas drying step (S222) for removing moisture from the combustion gas with reduced temperature using a dryer (222); a combustion gas compression step (S223) for pressurizing the combustion gas using a blower provided in a compressor (223); and a carbon dioxide capture step (S224) for precipitating and capturing carbon dioxide by reverse sublimating the combustion gas through heat exchange with ultra-low temperature nitrogen in a second heat exchanger (224).

[0030] Additionally, the second heat exchanger (224) includes heat exchange based on a cascade refrigeration system using a high-temperature refrigerant consisting of either R404A or ammonia and a low-temperature refrigerant consisting of R23, an HFC refrigerant. Effects of the invention

[0032] According to the present invention, which is configured as described above, coal or combustion gases generated from thermal power plants can be immediately collected and processed, thus offering significant expected benefits in terms of social, policy, and environmental aspects.

[0034] In addition, the present invention allows the separation of carbon dioxide to approach the theoretical minimum value within the efficiency range of the heat exchanger and compressor, and thus requires about 50% of the parasitic load compared to existing technology, thereby providing a more efficient and cheaper process.

[0036] Furthermore, the present invention is constructed as a carbon dioxide cryogenic precipitation capture system based on deep cryogenics, thereby contributing to reverse sublimation energy savings by pre-cooling combustion gases with waste cold energy. In addition, it has the effect of maximizing efficiency in equipment management and maintenance, such as low initial installation and operating costs, simple equipment, and a low failure rate. Brief explanation of the drawing

[0038] FIG. 1 is a flowchart sequentially listing the ammonium carbonate manufacturing process configured according to a preferred embodiment of the present invention. FIG. 2 is an exemplary diagram of an injection tank proposed by the present invention. FIG. 3 is an exemplary diagram of a collection facility section proposed by the present invention. FIG. 4 is an exemplary diagram of a precipitation unit proposed by the present invention. FIG. 5 is an exemplary diagram of a cyclone proposed by the present invention. Specific details for implementing the invention

[0039] Hereinafter, the structure of the present invention and the resulting operation and effects will be described collectively with reference to the attached drawings.

[0041] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Furthermore, throughout the entire specification, the same reference numerals refer to the same components.

[0043] The present invention relates to a method for effectively collecting and treating coal or combustion gases generated in a thermal power plant.

[0045] Above all, it is noted that the present invention relates to a method for carbon dioxide capture based on a deep cryogenic method and a method for producing ammonium carbonate using ammonia, in which convenience or efficiency of use is maximized due to ease of handling, use, maintenance, and repair derived from a structure differentiated from existing ones, thereby enabling more efficient precipitation and capture of low-concentration carbon dioxide by utilizing ammonia extracted from coal and providing the captured carbon dioxide to be utilized as renewable energy, thus making a significant contribution in economic, social, policy, environmental, and safety aspects.

[0047] FIG. 1 is a flowchart sequentially listing an ammonium carbonate manufacturing process configured according to a preferred embodiment of the present invention, FIG. 2 is an exemplary diagram of an injection tank proposed by the present invention, FIG. 3 is an exemplary diagram of a collection facility proposed by the present invention, FIG. 4 is an exemplary diagram of a precipitation unit proposed by the present invention, and FIG. 5 is an exemplary diagram of a cyclone proposed by the present invention.

[0049] The core technology of the present invention is to immediately collect coal and combustion gas generated from a thermal power plant, capture ammonia water and carbon dioxide from the coal and combustion gas, respectively, and then produce ammonium carbonate by reacting them in a gas-liquid reaction.

[0050] Here, combustion gas refers to the compounds resulting from the combustion of fuel that are released through the chimney after fuel is used in a thermal power plant. The main components of combustion gas consist of hydrogen sulfide, carbon dioxide, and nitrogen.

[0051] The present invention aims to provide a technology capable of precipitating and capturing carbon dioxide from combustion gases. Furthermore, by modifying a container to manufacture a carbon dioxide treatment system, the technology enables not only marine carbon dioxide treatment installed on ships but also land-based carbon dioxide treatment installed on land.

[0053] The present invention can be carried out by utilizing a device comprising: an injection tank (100) for collecting combustion gas from a chimney of a thermal power plant; and a collection facility (200) for cooling, precipitating, and collecting the combustion gas.

[0054] The ammonium carbonate manufacturing process of the present invention, comprising the above-described apparatus, is composed of: an ammonia water recovery step (S100) for capturing ammonia generated from a thermal power plant and recovering ammonia water; a carbon dioxide capture step (S200) for precipitating and capturing carbon dioxide from combustion gas generated from a thermal power plant using a deep cryogenic method; and an ammonium carbonate manufacturing step (S300) for obtaining ammonium carbonate by reacting carbon dioxide and ammonia water in a gas-liquid reaction.

[0056] The above ammonia water recovery step (S100) may be composed of: a coal recovery step (S110) for recovering coal generated from a thermal power plant; a coal oxidation step (S120) for oxidizing coal by introducing coal into a coal gasification reactor and injecting oxygen to produce carbon monoxide and hydrogen; and an ammonia acquisition step (S130) for obtaining high-concentration ammonia water by converting carbon monoxide into hydrogen and carbon dioxide through a water reaction with steam, while simultaneously extracting and capturing ammonia.

[0057] For example, such ammonia water can be produced through a coal gasification process and may include the steps of: capturing ammonia generated in the coal gasification process and recovering it as ammonia water; recovering carbon dioxide generated in the coal gasification process and then using a gas-liquid reaction with the ammonia water to produce an ammonium carbonate slurry containing ammonium carbonate salt and water; separating the produced ammonium carbonate slurry from the liquid phase to recover the ammonium carbonate salt; and solidifying the ammonium carbonate salt.

[0058] Here, the carbon dioxide in the step of producing an ammonium carbonate slurry containing an ammonium carbonate salt and water by using a gas-liquid reaction with the ammonia water obtained by capturing the ammonia generated in the above coal gasification process and the carbon dioxide generated in the coal gasification process after recovering the carbon dioxide generated in the coal gasification process can be obtained from a coal gasification process or a gasification process using biomass, but this is an embodiment of the present invention and is not limited thereto.

[0059] The aforementioned coal gasification process involves injecting pure oxygen into a coal gasification reactor to partially oxidize a portion of the dried coal, thereby generating CO and H2. The CO is then converted into H2 and CO2 through a water-reaction reaction with externally injected steam (H2O). The generated CO2 is selectively removed via physicochemical methods to recover H2, which is then reacted with CO to produce CH4, a synthetic natural gas. In other words, the primary reaction of this process produces CO, CO2, H2, and CH4, while secondary substances such as hydrogen sulfide and ammonia may also be generated.

[0060] At this time, ammonia is removed in the step prior to the aqueous reaction and recovered in the form of high-concentration ammonia water, and carbon dioxide is recovered in a high concentration after being selectively removed through physicochemical methods in the aqueous reaction.

[0061] The above-mentioned method for recovering ammonia water and carbon dioxide is not particularly limited as long as it is a method well known in the relevant technical field, but examples include physical adsorption methods and chemical absorption methods.

[0063] In addition, while the carbon dioxide may be provided by introducing it separately from the outside, the present invention utilizes a method that allows for easy and highly efficient acquisition through combustion gas precipitation and carbon dioxide capture based on deep cryogenics. Furthermore, this method can be achieved through the carbon dioxide capture step (S200) proposed by the present invention.

[0064] Accordingly, the carbon dioxide capture step (S200) may be composed of: a combustion gas collection step (S210) in which combustion gas generated in a thermal power plant is collected and stored using a set injection tank (100) and the collected combustion gas is injected into a capture facility (200) upon request; and a carbon dioxide precipitation step (S220) in which solid carbon dioxide is captured by cooling and precipitating the combustion gas through a deep cryogenic-based cooling means mounted on the capture facility.

[0065] The above carbon dioxide capture step (S200) is entirely carried out within the capture facility (200). The capture facility (200) is not only in a form that can be easily installed on land, such as at a thermal power plant, but is also manufactured by modifying a ship container, allowing it to be easily loaded onto a ship. Furthermore, since it is easily secured to the ship via a fixing means provided in the container, the facility can be provided in a very rapid and convenient structure. For example, the capture facility (200) is equipped with a cooling means for cooling carbon dioxide and a capture means for capturing the cooled carbon dioxide. The capture facility (200) receives combustion gas from the injection tank (100), precipitates carbon dioxide by cooling the combustion gas through the cooling means prepared inside, and performs the role of capturing the carbon dioxide that has solidified through precipitation.

[0066] This capture facility (200) is composed of: a receiving section (210) having a container structure; a precipitation unit (220) based on a deep cooling method, which is a means for cooling combustion gas to solidify carbon dioxide; and a cyclone (230) for capturing carbon dioxide that has been reverse sublimated by the precipitation unit.

[0067] As described above, the collection facility (200) precipitates solidified carbon dioxide from combustion gas based on ultra-low temperature carbon dioxide precipitation technology through the precipitation unit (220).

[0068] For example, the present invention is implemented based on cryogenic carbon dioxide crystallization (CCC) technology. This cryogenic carbon dioxide crystallization technology is carried out by a carbon dioxide crystallization step (S220), which, in detail, may be composed of: a combustion gas pre-cooling step (S221) in which the temperature of the combustion gas is reduced through a first heat exchanger (221); a combustion gas drying step (S222) in which moisture is removed from the combustion gas with reduced temperature using a dryer (222); a combustion gas compression step (S223) in which the combustion gas is pressurized to a set level using a blower equipped in a compressor (223); and a carbon dioxide capture step (S224) in which carbon dioxide is crystallized and captured by reverse sublimating the combustion gas through heat exchange with cryogenic nitrogen via a second heat exchanger (224).

[0069] Conventional carbon dioxide capture technologies include wet capture methods using liquid absorbents such as amine-based absorbents or potassium carbonate absorbents; dry capture methods using solid absorbents such as alkali metals or solid amine absorbents; and membrane capture methods utilizing differences in membrane polarity such as polymer membranes or inorganic membranes. Here, the wet capture method, which has been used since around the 1990s, has a very high level of technological maturity and offers the advantage of enabling large-scale operation relative to low investment. However, it has disadvantages such as issues with the volatility, corrosiveness, and toxicity of amine-based absorbents, as well as the consumption of a large amount of thermal energy for absorbent regeneration. The dry capture method has fewer problems with environmental pollution and corrosion, but it requires high thermal energy, resulting in high operating costs, and has the problem of low thermal conductivity between the solid absorbent and the regeneration heat. The membrane capture method has the advantages of low operating costs and excellent membrane performance, but it has disadvantages such as the membrane being considerably expensive, high initial investment costs, and difficulty in capturing high-purity carbon dioxide due to imperfect permeability.

[0070] Unlike conventional wet, dry, and membrane capture methods, the present invention utilizes a cryogenic precipitation capture method based on deep cryogenics, which enables capture with minimal energy, has low initial installation and operating costs, is extremely simple to install and operate, and has a low failure rate, making maintenance and management easy.

[0071] The aforementioned cryogenic precipitation capture method is based on the principle of converting carbon dioxide gas into solid dry ice at -78.5°C. This method is executed by removing moisture from the combustion gas through a precooler and a dryer, and then separating and capturing carbon dioxide at atmospheric pressure using the cold energy of liquid nitrogen without the need for pressure-changing devices. As mentioned above, this cryogenic precipitation capture method saves reverse sublimation energy by pre-cooling high-temperature combustion gas using waste cold energy; it also offers low initial installation and operating costs, is extremely simple to install and operate, and has a low failure rate, making maintenance and management easy.

[0072] The precipitation unit (220) proposed as a feature of the present invention comprises: a first heat exchanger (221) for reducing the temperature of a combustion gas containing carbon dioxide; a dryer (222) for removing moisture from the combustion gas with reduced temperature; a compressor (223) for pressurizing the combustion gas through a blower; and a second heat exchanger (224) based on reverse sublimation that exchanges heat with ultra-low temperature nitrogen.

[0073] As described above, the combustion gas is pre-cooled from the outlet temperature to a temperature close to the ambient temperature through the first heat exchanger (221). Afterward, it enters the dryer (222) and moisture is removed from the combustion gas by the pre-cooler. The combustion gas from which moisture has been removed is compressed by a predetermined pressure applied by a blower (223), and then passes through the second heat exchanger (224) to separate carbon dioxide using the cold heat of liquid nitrogen at atmospheric pressure without a device to change the pressure.

[0074] The above second heat exchanger (224) performs heat exchange based on a cascade refrigeration system using a high-temperature side refrigerant consisting of either R404A or ammonia and a low-temperature side refrigerant consisting of R23, an HFC refrigerant.

[0075] The above cyclone (230) includes a filterless collection method that removes fine particles of solid carbon dioxide through vortex separation.

[0076] As shown in the drawing, the cyclone (230) collects the dry ice gas in the form of granules extracted by ultra-low temperature reverse sublimation from the combustion gas under atmospheric pressure under a solid load ratio of 0.1976 as a boundary condition for computational toxicity analysis.

[0078] Example 1 below is a graph related to dry ice using the reverse sublimation phase change of the precipitation unit (220) proposed by the present invention.

[0080]

[0081] Dry ice produced using reverse sublimation phase change

[0082] The above-mentioned precipitation unit (210) precipitates carbon dioxide from combustion gas based on a phase change by reverse sublimation. This reverse sublimation phase change is based on Hess's law. According to Hess's law, the total enthalpy change of a process is independent of the path, that is, the enthalpy change of a process can be calculated by summing the enthalpy changes for individual steps of the process regardless of the step arrangement method. For example, the enthalpy change for the sublimation and reverse sublimation of carbon dioxide from solid to gas can be calculated by adding the enthalpy changes for the next step, as shown in the graph of Example 1 above. For example, it can be applied when solid carbon dioxide is fused into liquid carbon dioxide or when liquid carbon dioxide is vaporized into gaseous carbon dioxide.

[0083] Meanwhile, to engineer a cryogenic carbon dioxide precipitation process, it is advantageous to first recognize the specific latent heat of sublimation at an appropriate temperature below the three-state transition point and apply the isobaric specific heat capacity when cooling to that temperature. Accordingly, it is necessary to maintain constant pressure on both sides during the process. For example, the design of a carbon dioxide reverse sublimation process is possible by utilizing Hess’s law, which states that the total enthalpy change of the process is independent of the path, and Kirchhoff’s approximate equation for the heat of sublimation.

[0085] Example 2 below relates to a process flow diagram for ultra-low temperature carbon dioxide precipitation using Aspen Plus computational simulation.

[0088]

[0089] <Cryogenic Carbon Dioxide Precipitation Process Flow Chart>

[0090] The process flow diagram of Example 2 above is an example process flow diagram modeled with Aspen Plus for an ultra-low temperature carbon dioxide precipitation process. It was manufactured assuming a standard exhaust gas composition of 150°C and 41.5 kg / h, and an ultra-low temperature liquid nitrogen cooling condition of -180°C and a flow rate of 32.80 kg / h.

[0092] Example 3 below is a formula for calculating the capture rate of ultra-low temperature carbon dioxide based on the above assumption.

[0094]

[0095] <Aspen Plus 전산모사 입력 조건에 따른 이산화탄소 포집율 계산식>

[0096] As described above, the input was made assuming a standard exhaust gas composition of 150°C and 41.5 kg / h, and the cold liquid nitrogen was set to -180°C and the flow rate to 32.80 kg / h. When analyzed using Aspen Plus, the ultra-low temperature carbon dioxide capture rate was confirmed to be 92.70%.

[0098] Example 4 below relates to a cryogenic carbon dioxide precipitation test.

[0100]

[0101] Schematic Diagram of Ultra-low Temperature Dual Refrigeration System

[0102] According to the schematic diagram of the ultra-low temperature dual refrigeration system as in Example 4 above, the cascade refrigeration system is a refrigeration system that uses two types of refrigerants with different boiling points, and each refrigerant passes through an independent refrigeration cycle and is connected to a heat exchanger. The system is used to obtain ultra-low temperatures of -40 to -80°C or lower. In the cascade refrigeration system, a commonly used refrigerant (R404A, ammonia, etc.) is used on the high-temperature side, and an HFC refrigerant, R23, is used on the low-temperature side.

[0104] The above-mentioned receiving section (210) is composed of: a storage section (211) of a marine container structure with an open upper portion; a door section (212) that automatically opens and closes the open upper portion of the storage section; and an insulating material (213) that protects the solid carbon dioxide contained in the storage section.

[0106] Table 1 below shows the performance indicators for the ammonium carbonate manufacturing process proposed by the present invention.

[0108]

[0109] <Detailed Performance Indicators>

[0111] According to the present invention, which is configured as described above, coal or combustion gases generated from thermal power plants can be immediately collected and processed, thus offering significant expected benefits in terms of social, policy, and environmental aspects.

[0112] In addition, the present invention allows the separation of carbon dioxide to approach the theoretical minimum value within the efficiency range of the heat exchanger and compressor, and thus requires about 50% of the parasitic load compared to existing technology, thereby providing a more efficient and cheaper process.

[0113] Furthermore, the present invention is constructed as a carbon dioxide cryogenic precipitation capture system based on deep cryogenics, thereby contributing to reverse sublimation energy savings by pre-cooling combustion gases with waste cold energy. In addition, it has the effect of maximizing efficiency in equipment management and maintenance, such as low initial installation and operating costs, simple equipment, and a low failure rate.

[0115] The present invention described above has been explained with reference to an exemplary embodiment illustrated in the drawings, but this is merely illustrative, and it should be made clear to those skilled in the art that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be interpreted by the appended claims, and all technical ideas within an equivalent scope should be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0117] S100. Ammonia water recovery stage S110. Coal recovery stage S120. Coal oxidation stage S130. Ammonia acquisition stage S200. Carbon dioxide capture stage S210. Combustion gas collection stage S220. Carbon dioxide precipitation stage S221. Combustion gas pre-cooling stage S222. Combustion gas drying stage S223. Combustion gas compression stage S224. Carbon dioxide capture step S300. Ammonium carbonate manufacturing step

Claims

Claim 1 The method comprises: an ammonia water recovery step (S100) for recovering ammonia water by capturing ammonia generated from a thermal power plant; a carbon dioxide capture step (S200) for precipitating and capturing carbon dioxide from combustion gas generated from a thermal power plant using a deep cryogenic method; and an ammonium carbonate manufacturing step (S300) for obtaining ammonium carbonate by reacting carbon dioxide and ammonia water in a gas-liquid reaction; wherein the carbon dioxide capture step (S200) comprises: a combustion gas collection step (S210) for collecting and storing combustion gas generated from a thermal power plant using a set injection tank (100) and injecting the collected combustion gas into a capture facility (200) upon request; and a carbon dioxide precipitation step (S220) for capturing solid carbon dioxide by cooling and precipitating the combustion gas through a cooling means based on a deep cryogenic method mounted on the capture facility; wherein the carbon dioxide precipitation step (S220) reduces the temperature of the combustion gas through a first heat exchanger (221). The method comprises: a combustion gas pre-cooling step (S221); a combustion gas drying step (S222) for removing moisture from the combustion gas with reduced temperature using a dryer (222); a combustion gas compression step (S223) for pressurizing the combustion gas using a blower equipped in a compressor (223); and a carbon dioxide capture step (S224) for precipitating and capturing carbon dioxide by reverse sublimating the combustion gas through heat exchange with ultra-low temperature nitrogen in a second heat exchanger (224); wherein the second heat exchanger (224) includes heat exchange based on a cascade refrigeration system using a high-temperature side refrigerant consisting of either R404A or ammonia and a low-temperature side refrigerant consisting of R23, an HFC refrigerant; and the capture facility (200) includes a receiving section (210) having a container structure; a precipitation unit (220) based on deep cryogenics, which is a means for cooling the combustion gas to solidify carbon dioxide; and the precipitation unit A cyclone (230) for capturing carbon dioxide that has been reverse-sublimated by; wherein the receiving portion (210) comprises a storage portion (211) of a marine container structure with an open upper portion; and a door portion (212) for automatically opening and closing the open upper portion of the storage portion.A method for carbon dioxide capture based on cryogenics and manufacturing ammonium carbonate using ammonia, comprising: a thermal insulation material (213) that protects solid carbon dioxide contained in a storage unit; wherein the precipitation unit (220) comprises: a first heat exchanger (221) that reduces the temperature of combustion gas containing carbon dioxide; a dryer (222) that removes moisture from the combustion gas with reduced temperature; a compressor (223) that pressurizes the combustion gas to a set level via a blower; and a second heat exchanger (224) based on reverse sublimation that exchanges heat with ultra-low temperature nitrogen; and wherein the cyclone (230) is a filterless capture method that removes fine particles of solid carbon dioxide via vortex separation, and capture is performed under conditions of a Solid Load Ratio of 0.1976 relative to the dry ice gas in the form of granules extracted by ultra-low temperature reverse sublimation from combustion gas under atmospheric pressure. Claim 2 In claim 1, the ammonia water recovery step (S100) comprises: a coal recovery step (S110) for recovering coal generated from a thermal power plant; a coal oxidation step (S120) for oxidizing coal by introducing coal into a coal gasification reactor and injecting oxygen to produce carbon monoxide and hydrogen; and an ammonia acquisition step (S130) for obtaining high-concentration ammonia water by simultaneously extracting and capturing ammonia while converting carbon monoxide into hydrogen and carbon dioxide by reacting it with steam. Claim 3 delete Claim 4 delete Claim 5 delete

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