A system and method for separating and utilizing carbon dioxide based on spectral modulation

Abstract

A system and method for separating and utilizing carbon dioxide based on spectral modulation, which consists of a carbon capture part and a carbon dioxide cold storage part; the carbon capture part includes an air pump, a gas-solid mixing chamber, a carbon dioxide absorption cavity, a solar concentrator, a centrifugal separator, a one-way particle release valve, a carbon dioxide desorption cavity, a particle filter layer and related pipelines; the carbon dioxide cold storage part includes a booster pump, a pressure control valve, a reactor, a one-way control valve, a cold storage tank, a circulation pump, a heat exchanger, a reaction solution replenisher and related pipelines. The present invention utilizes the modulation effect of special glass on the solar spectrum, the selective absorption and conversion effect of graphene quantum dots on solar energy, and utilizes multiple bands of sunlight. At the same time, solid particles are used to capture carbon dioxide, thereby realizing a solar-driven carbon dioxide separation and utilization system and method.

Description

Technical Field

[0001] The present invention relates to the technical field of solar carbon capture, and in particular to a system and method for separating and utilizing carbon dioxide based on spectral modulation. Background Art

[0002] The impact of global warming is becoming increasingly significant, and the greenhouse effect caused by the large amount of carbon dioxide emissions cannot be ignored. Countries around the world have to take energy-saving and emission-reduction measures, among which carbon capture, storage and utilization are effective measures to reduce carbon emissions. Using solar energy to power the carbon capture process helps reduce dependence on traditional energy to power the carbon capture process and alleviate the global warming crisis.

[0003] At present, solar energy is mainly used through photoelectric conversion and indirect photothermal utilization. Direct use of solar energy in the carbon capture process, especially the use of different solar bands to achieve different stages of the carbon capture process, is relatively rare. Using solar energy in different bands to participate in the carbon capture process has the advantages of high energy utilization and large total energy. Summary of the invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a system and method for separation and utilization of carbon dioxide based on spectral modulation. Taking into account the limitations of utilizing single-band solar energy, the present invention is based on the modulation effect of special glass on the solar spectrum and the absorption characteristics of graphene quantum dots to sunlight, and utilizes solar energy from the visible light band to the near-infrared band, thereby realizing solar-driven separation and utilization of carbon dioxide.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A system for separating and utilizing carbon dioxide based on spectral modulation, which consists of a carbon capture part and a carbon dioxide cold storage part.

[0007] The carbon capture part includes an air pump 1, a gas-solid mixing chamber 2, a carbon dioxide absorption chamber 3, a solar concentrator 4, a centrifugal separator 5, a first one-way particle release valve 6 and a second one-way particle release valve 8, a carbon dioxide desorption chamber 7, a particle filter layer 9, a composite carbon capture particle circulation and related pipelines; the inlet of the inlet pipeline 1-1 is connected to the mixed gas source, the air pump 1 is arranged on the inlet pipeline 1-1, and the outlet of the inlet pipeline 1-1 is connected to the mixed gas inlet of the gas-solid mixing chamber 2; the recovery port of the gas-solid mixing chamber 2 is connected to the recovery pipeline 2-4, and the outlet of the gas-solid mixing chamber 2 is connected to the lower part of the carbon dioxide absorption chamber 3 through the outlet pipeline 2-1; one side wall of the carbon dioxide absorption chamber 3 is made of special glass, and the top of the carbon dioxide absorption chamber 3 is connected to the recovery pipeline 2-4; the outlet of the gas-solid mixing chamber 2 is connected to the lower part of the carbon dioxide absorption chamber 3 through the outlet pipeline 2-1; the ... recovery pipeline 2-4; the outlet of the gas-solid mixing chamber 2 is connected to the lower part of the carbon dioxide absorption chamber 3 through the outlet pipeline 2-1; the side wall of the carbon dioxide absorption chamber 3 is made of special glass, and the top of the carbon dioxide absorption chamber 3 is connected to the recovery pipeline 2-4; the outlet of the The top pipeline 2-2 is connected to the inlet of the centrifugal separator 5; the gas outlet of the centrifugal separator 5 is connected to the decarbonization tail gas treatment part through the gas outlet pipeline 1-2, and the solid outlet of the centrifugal separator 5 is connected to the top of the carbon dioxide desorption chamber 7 through the solid outlet pipeline 2-3 with a first one-way particle release valve 6; one side wall of the carbon dioxide desorption chamber 7 is connected to the inlet of the side pipeline 3-5 through a particle filter layer 9, and a filter material is arranged on the upper part of the other side wall, and the lower part of the other side is connected to the gas-solid mixing chamber 2 through a lower pipeline 2-4 with a second one-way particle release valve 8; the inlet of the side pipeline 3-5 is connected to the particle filter layer 9, and the outlet is divided into two, one is connected to the reactor inlet pipeline 3-1, and the other goes to the carbon dioxide collection;

[0008] The carbon dioxide cold storage part includes a booster pump 16, a pressure control valve 10, a reactor 11, a first one-way control valve 13, a second one-way control valve 14, a third one-way control valve 15, a cold storage tank 12, a heat exchanger 17, a reaction solution replenisher 18, a circulation pump 19 and related pipelines; the inlet of the reactor inlet pipeline 3-1 is connected to an outlet of the side pipeline 3-5, and the booster pump 16 and the pressure control valve 10 are sequentially arranged on the reactor inlet pipeline 3-1 along the flow direction of carbon dioxide, and the outlet of the reactor inlet pipeline 3-1 is connected to the carbon dioxide inlet of the reactor 11; the reaction solution inlet of the reactor 11 is connected to the outlet of the side pipeline 3-5 through the first one-way control valve 14 ... The reaction solution inlet pipeline 3-3 of the one-way control valve 13 and the circulation pump 19 is connected to the reaction solution outlet of the reaction solution replenisher 18; the carbon dioxide hydrate outlet of the reactor 11 is connected to the carbon dioxide hydrate inlet of the cold storage tank 12 via the carbon dioxide hydrate outlet pipeline 3-2 with the second one-way control valve 14; the carbon dioxide hydrate outlet of the cold storage tank 12 is connected to the heat exchanger 17 via the carbon dioxide hydrate outlet pipeline 3-4 with the third one-way control valve 15; the carbon dioxide hydrate outlet of the heat exchanger 17 is connected to the recovery inlet of the reaction solution replenisher 18 via the reaction solution replenisher inlet pipeline 3-6.

[0009] A method for separating and utilizing carbon dioxide based on spectral modulation specifically comprises the following steps:

[0010] Step 1, carbon dioxide capture and separation: after the mixed gas is pressurized by the air pump 1, it enters the gas-solid mixing chamber 2 through the inlet pipeline 1-1, and sucks the composite carbon capture particles released by the second one-way particle release valve 8 to form a gas-solid mixture, and enters the carbon dioxide absorption chamber 3 through the outlet pipeline 2-1. In the carbon dioxide absorption chamber 3, the phase change material inside the composite carbon capture particles absorbs heat under the irradiation of near-infrared wavelength sunlight concentrated by the solar concentrator 4 and converted by special glass, and at the same time, carbon dioxide is adsorbed on the carbon dioxide absorption film layer on the surface of the composite carbon capture particles. The gas-solid mixture enters the centrifugal separator 5 radially through the top pipeline 2-2. Under the action of the centrifugal separator 5, the gas after carbon capture is separated from the gas outlet pipeline 1-2 at the top of the centrifugal separator 5. The composite carbon capture particles adsorbing carbon dioxide fall into the bottom of the centrifugal separator 5, the first one-way particle release valve 6 is opened, the composite carbon capture particles enter the carbon dioxide desorption chamber 7, the first one-way particle release valve 6 is closed, and the carbon dioxide in the composite carbon capture particles is desorbed under the sunlight collected by the solar concentrator 4 and screened by the filter material, and then the composite carbon capture particles fall into the bottom of the carbon dioxide desorption chamber 7 and enter the lower pipeline 2-4, the second one-way particle release valve 8 is opened, the composite carbon capture particles enter the gas-solid mixing chamber 2 to start the next cycle, and the second one-way particle release valve 8 is closed; the separated carbon dioxide passes through the particle filter layer 9 under the action of pressure, is transported and collected through the side pipeline 3-5, and is transported and recycled through the reactor inlet pipeline 3-1;

[0011] Step 2, carbon dioxide utilization: the first one-way control valve 13 is opened, the reaction solution enters the reactor 11 through the reactor inlet pipeline 3-1, and the first one-way control valve 13 is closed; the second one-way control valve 14 is closed; the pressure control valve 10 is opened, the pressure of carbon dioxide increases after passing through the booster pump 16, and the carbon dioxide enters the reactor 11. After reaching the pressure required for the reaction, the pressure control valve 10 is closed; carbon dioxide hydrate is generated, the second one-way control valve 14 is opened, and carbon dioxide hydrate enters the cold storage tank 12 for storage through the carbon dioxide hydrate outlet pipeline 3-2; when there is a demand for cooling, the third one-way control valve 15 is opened, and carbon dioxide hydrate enters the heat exchanger 17 through the carbon dioxide hydrate outlet pipeline 3-4 to provide cooling to the user, and then enters the reaction solution replenisher 18 along the reaction solution replenisher inlet pipeline 3-6. After replenishment, the reaction solution leaves the reaction solution replenisher 18, the first one-way control valve 13 is opened, and the reaction solution enters the reactor 11 through the reaction solution inlet pipeline 3-3 driven by the circulation pump 19 to participate in the preparation of carbon dioxide hydrate.

[0012] The special glass disposed on one side wall of the carbon dioxide absorption chamber 3 is composed of a chalcogenide glass with S, Se, and Te as main anions doped with a small amount of Yb 3+ 、Tm 3+Rare earth elements such as carbon dioxide are prepared through calcination, film forming, annealing, polishing and other processes; special glass converts short-wave sunlight into near-infrared wavelengths (800nm-1100nm) and then projects it into the carbon dioxide absorption cavity 3.

[0013] The filter material arranged on the upper part of the other side wall of the carbon dioxide desorption chamber 7 adopts a short-pass filter with a transmission wavelength range of 300nm-600nm, and the transmittance of short-wavelength light such as visible light is greater than 0.9, and the transmittance of infrared wavelength sunlight is less than 0.1. It is closely connected with the carbon dioxide desorption chamber 7 to ensure the effective entry of sunlight and the internal sealing of the carbon dioxide desorption chamber 7.

[0014] The carbon dioxide absorption cavity 3 contains composite carbon capture particles, which are shell-core structure microcapsules with a size of micrometers, with a phase change heat storage material inside and a carbon dioxide absorption film layer outside; the carbon dioxide absorption film layer is a porous material prepared by organic group coordination and organic polymer reaction, and nano-graphene quantum dots are doped on its surface. The film layer can adsorb carbon dioxide under near-infrared sunlight and absorb heat and release carbon dioxide under visible light; the nano-graphene quantum dots are nano-scale particles that can quickly absorb solar energy within the ultraviolet and visible light wavelength ranges and convert them into heat energy for transmission to the carbon dioxide absorption film layer.

[0015] The gas outlet pressure of the centrifugal separator 5 is always greater than the ambient pressure, ensuring that the gas outlet space is not polluted by other gases;

[0016] The particle filter layer 9 in the carbon dioxide desorption chamber 7 is formed of a dense mesh structure using high-fiber material to ensure smooth passage of carbon dioxide without clogging by particles.

[0017] The reactor 11 has good heat exchange with the outside world, ensuring that the temperature inside the reactor does not exceed 15°C.

[0018] The main component of the reaction solution in the reactor 11 is 1%wt NaCl aqueous solution.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The present invention utilizes the modulation effect of special glass on the solar energy spectrum and the absorption and conversion effect of graphene quantum dots on solar energy to realize the absorption and release of different bands of solar energy in the carbon capture process, and adopts a gas-composite carbon capture particle mixture to realize an efficient carbon dioxide separation process in the cavity, and utilizes the separated carbon dioxide at the same time, thereby realizing a solar-driven carbon dioxide separation and utilization system and method. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1Schematic diagram of the carbon dioxide separation and utilization system based on spectral modulation.

[0022] Figure 2 This is a simplified diagram of the composite carbon capture particle structure. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, a system for separating and utilizing carbon dioxide based on spectral modulation is composed of a carbon capture part and a carbon dioxide cold storage part. The carbon capture part includes an air pump 1, a gas-solid mixing chamber 2, a carbon dioxide absorption chamber 3, a solar concentrator 4, a centrifugal separator 5, a first one-way particle release valve 6 and a second one-way particle release valve 8, a carbon dioxide desorption chamber 7, a particle filter layer 9, a composite carbon capture particle circulation and related pipelines. The carbon dioxide cold storage part includes a booster pump 16, a pressure control valve 10, a reactor 11, a first one-way control valve 13, a second one-way control valve 14, a third one-way control valve 15, a cold storage tank 12, a heat exchanger 17, a reaction solution replenisher 18, a circulation pump 19 and related pipelines.

[0025] The inlet of the inlet pipeline 1-1 is connected to the mixed gas source, the air pump 1 is arranged on the inlet pipeline 1-1, and the outlet of the inlet pipeline 1-1 is connected to the mixed gas inlet of the gas-solid mixing chamber 2; the recovery port of the gas-solid mixing chamber 2 is connected to the recovery pipeline 2-4, and the outlet of the gas-solid mixing chamber 2 is connected to the lower part of the carbon dioxide absorption chamber 3 through the outlet pipeline 2-1; a special glass is arranged on one side wall of the carbon dioxide absorption chamber 3, and the side wall is directly facing the solar concentrator 4. The special glass converts short-wave sunlight into a near-infrared wavelength of 800nm-1100nm and then projects it into the carbon dioxide absorption chamber 3. The top of the carbon dioxide absorption chamber 3 is connected to the inlet of the centrifugal separator 5 through the top pipeline 2-2; The gas outlet of the centrifugal separator 5 is connected to the decarbonization tail gas treatment part through the gas outlet pipeline 1-2, and the solid outlet of the centrifugal separator 5 is connected to the top of the carbon dioxide desorption chamber 7 through the solid outlet pipeline 2-3 with a first one-way particle release valve 6; one side wall of the carbon dioxide desorption chamber 7 is connected to the inlet of the side pipeline 3-5 through a particle filter layer 9, and a filter material is arranged on the upper part of the other side wall, and the lower part of the other side is connected to the gas-solid mixing chamber 2 through a lower pipeline 2-4 with a second one-way particle release valve 8; the inlet of the side pipeline 3-5 is connected to the particle filter layer 9, and the outlet is divided into two, one is connected to the reactor inlet pipeline 3-1, and the other goes to the carbon dioxide collection;

[0026] The inlet of the reactor inlet pipeline 3-1 is connected to one outlet of the side pipeline 3-5. A booster pump 16 and a pressure control valve 10 are sequentially arranged on the reactor inlet pipeline 3-1 along the flow direction of carbon dioxide. The outlet of the reactor inlet pipeline 3-1 is connected to the carbon dioxide inlet of the reactor 11; the reaction solution inlet of the reactor 11 is connected to the reaction solution outlet of the reaction solution replenisher 18 through a reaction solution inlet pipeline 3-3 with a first one-way control valve 13 and a circulation pump 19, and the carbon dioxide hydrate outlet of the reactor 11 is connected to the carbon dioxide hydrate inlet of the cold storage tank 12 through a carbon dioxide hydrate outlet pipeline 3-2 with a second one-way control valve 14; the carbon dioxide hydrate outlet of the cold storage tank 12 is connected to the heat exchanger 17 through a carbon dioxide hydrate outlet pipeline 3-4 with a third one-way control valve 15; the carbon dioxide hydrate outlet of the heat exchanger 17 is connected to the recovery inlet of the reaction solution replenisher 18 through a reaction solution replenisher inlet pipeline 3-6.

[0027] like Figure 2 As shown, the composite carbon capture particles are micron-scale shell-core structure microcapsules, with a phase change heat storage material inside and a carbon dioxide absorption film layer outside; the carbon dioxide absorption film layer is a porous material prepared by organic group coordination and organic polymer reaction, and nano-graphene quantum dots are doped on its surface. The film layer can adsorb carbon dioxide under near-infrared sunlight and absorb heat and release carbon dioxide under visible light; the nano-graphene quantum dots are nano-scale particles that can quickly absorb solar energy within the ultraviolet and visible light wavelength ranges and convert them into heat energy for transmission to the carbon dioxide absorption film layer.

[0028] Implementation Cases:

[0029] like Figure 1As shown, the capture and release of carbon dioxide: the mixed gas is pressurized to 0.2MPa by the air pump 1 and enters the gas-solid mixing chamber 2, and after sucking the composite carbon capture particles released by the second one-way particle release valve 8, it enters the carbon dioxide absorption chamber 3. In the carbon dioxide absorption chamber 3, the composite carbon capture particles are irradiated by 800nm-1100nm sunlight concentrated by the solar concentrator 4 and converted by special glass, and the heat absorption temperature of the phase change material inside the composite carbon capture particles rises to about 75°C. After carbon dioxide is adsorbed on the carbon dioxide absorption film layer on the surface of the composite carbon capture particles, the composite carbon capture particles enter the centrifugal separator 5 radially through the top pipeline 2-2. Under the action of the centrifugal separator 5, The mixed gas after carbon capture leaves from the gas outlet pipeline 1-2 at the top of the centrifugal separator 5, and the composite carbon capture particles adsorbing carbon dioxide fall into the bottom of the centrifugal separator 5. The first one-way particle release valve 6 opens, and the composite carbon capture particles adsorbing carbon dioxide enter the carbon dioxide desorption chamber 7. After the desorption of carbon dioxide is completed under the irradiation of 300nm-500nm sunlight, the phase change material inside the composite carbon capture particles releases heat and cools to about 40°C, and falls into the bottom of the carbon dioxide desorption chamber 7. The second one-way particle release valve 8 opens, and the composite carbon capture particles enter the gas-solid mixing chamber 2 to start the next cycle; carbon dioxide passes through the particle filter layer 9 and enters the side pipeline 3-5 for collection and utilization.

[0030] like Figure 1 As shown, the collection and utilization of carbon dioxide: carbon dioxide is collected through the side pipeline 3-5, a part of the carbon dioxide passes through the booster pump 16 and enters the reactor 11 to increase its pressure to 3Mpa and the temperature to 10-15°C, the reaction solution enters the reactor 11, and carbon dioxide hydrate is generated in the reactor 11. The carbon dioxide hydrate is sent to the cold storage tank 12 for storage. When there is a demand for refrigeration, the carbon dioxide hydrate enters the heat exchanger 17 to absorb heat and then enters the reaction solution replenisher 18. After adjustment, it enters the reactor 11 to participate in the reaction and circulate again.

Claims

1. A system for separation and utilization of carbon dioxide based on spectral modulation, characterized in that: It consists of a carbon capture part and a carbon dioxide cold storage part; The carbon capture part comprises an air pump (1), a gas-solid mixing chamber (2), a carbon dioxide absorption chamber (3), a solar concentrator (4), a centrifugal separator (5), a first one-way particle release valve (6) and a second one-way particle release valve (8), a carbon dioxide desorption chamber (7), a particle filter layer (9), a composite carbon capture particle circulation and related pipelines; the inlet of the inlet pipeline (1-1) is connected to a mixed gas source, the air pump (1) is arranged on the inlet pipeline (1-1), and the outlet of the inlet pipeline (1-1) is connected to the mixed gas inlet of the gas-solid mixing chamber (2); the recovery port of the gas-solid mixing chamber (2) is connected to the recovery pipeline (2-4), and the outlet of the gas-solid mixing chamber (2) is connected to the lower part of the carbon dioxide absorption chamber (3) through the outlet pipeline (2-1); a special glass is arranged on one side wall of the carbon dioxide absorption chamber (3), and the side wall is directly facing the solar concentrator (4). The top of the carbon dioxide absorption chamber (3) is connected to the inlet of the centrifugal separator (5) through the top pipeline (2-2); the gas outlet of the centrifugal separator (5) is connected to the decarbonization tail gas treatment part through the gas outlet pipeline (1-2), and the solid outlet of the centrifugal separator (5) is connected to the top of the carbon dioxide desorption chamber (7) through the solid outlet pipeline (2-3) with a first one-way particle release valve (6); one side wall of the carbon dioxide desorption chamber (7) is connected to the inlet of the side pipeline (3-5) through a particle filter layer (9), and a filter material is arranged on the upper part of the other side wall, and the lower part of the other side is connected to the gas-solid mixing chamber (2) through a lower pipeline (2-4) with a second one-way particle release valve (8); the inlet of the side pipeline (3-5) is connected to the particle filter layer (9), and the outlet is divided into two, one of which is connected to the reactor inlet pipeline (3-1) and the other goes to the carbon dioxide collection; The carbon dioxide cold storage part comprises a booster pump (16), a pressure control valve (10), a reactor (11), a first one-way control valve (13), a second one-way control valve (14), a third one-way control valve (15), a cold storage tank (12), a heat exchanger (17), a reaction solution replenisher (18), a circulation pump (19) and related pipelines; the inlet of the reactor inlet pipeline (3-1) is connected to an outlet of a side pipeline (3-5); the booster pump (16) and the pressure control valve (10) are arranged on the reactor inlet pipeline (3-1) in sequence along the flow direction of carbon dioxide; the outlet of the reactor inlet pipeline (3-1) is connected to the carbon dioxide inlet of the reactor (11); the reaction solution inlet of the reactor (11) is connected to the reactor (11) through a belt A reaction solution inlet pipeline (3-3) having a first one-way control valve (13) and a circulation pump (19) is connected to a reaction solution outlet of a reaction solution replenisher (18); a carbon dioxide hydrate outlet of a reactor (11) is connected to a carbon dioxide hydrate inlet of a cold storage tank (12) via a carbon dioxide hydrate outlet pipeline (3-2) having a second one-way control valve (14); a carbon dioxide hydrate outlet of the cold storage tank (12) is connected to a heat exchanger (17) via a carbon dioxide hydrate outlet pipeline (3-4) having a third one-way control valve (15); and a carbon dioxide hydrate outlet of the heat exchanger (17) is connected to a recovery inlet of a reaction solution replenisher (18) via a reaction solution replenisher inlet pipeline (3-6); The special glass disposed on one side wall of the carbon dioxide absorption cavity (3) is composed of chalcogenide glass with S, Se and Te as anions doped with Yb 3+ 、Tm 3+ , prepared through calcination, film formation, annealing and polishing processes; The carbon dioxide absorption cavity (3) contains composite carbon capture particles in the form of micron-scale shell-core structure microcapsules, with a phase change heat storage material inside and a carbon dioxide absorption film layer outside; the carbon dioxide absorption film layer is a porous material prepared by organic group coordination and organic polymer reaction, and nanographene quantum dots are doped on its surface. The film layer can adsorb carbon dioxide under near-infrared sunlight and absorb heat and release carbon dioxide under visible light; the nanographene quantum dots are nano-scale particles that can quickly absorb solar energy within the ultraviolet and visible light wavelength ranges and convert them into heat energy for transmission to the carbon dioxide absorption film layer.

2. The system for separation and utilization of carbon dioxide based on spectral modulation according to claim 1, characterized in that: The filter material arranged on the upper part of the other side wall of the carbon dioxide desorption cavity (7) is a short-pass filter with a transmission wavelength range of 300nm-600nm, with a transmittance of greater than 0.9 for short-wavelength light and less than 0.1 for infrared wavelength sunlight. The filter material is closely connected to the carbon dioxide desorption cavity to ensure the effective entry of sunlight and the internal sealing of the carbon dioxide desorption cavity (7).

3. The system for separation and utilization of carbon dioxide based on spectral modulation according to claim 1, characterized in that: The gas outlet pressure of the centrifugal separator (5) is always greater than the ambient pressure, ensuring that the gas outlet space is not polluted by other gases.

4. The system for separation and utilization of carbon dioxide based on spectral modulation according to claim 1, characterized in that: The particle filtering layer (9) in the carbon dioxide desorption cavity (7) is made of high-fiber material to form a dense mesh structure, thereby ensuring that carbon dioxide passes smoothly and that particles do not form blockages.

5. The system for separation and utilization of carbon dioxide based on spectral modulation according to claim 1, characterized in that: The temperature inside the reactor (11) does not exceed 15°C.

6. The system for separation and utilization of carbon dioxide based on spectral modulation according to claim 1, characterized in that: The reaction solution in the reactor (11) is a 1%wt NaCl aqueous solution.

7. A method for separating and utilizing carbon dioxide based on spectral modulation according to any one of claims 1 to 6, characterized in that: The specific steps include: Step 1, carbon dioxide capture and separation: after the mixed gas is pressurized by the air pump (1), it enters the gas-solid mixing chamber (2) through the inlet pipeline (1-1), and after entraining the composite carbon capture particles released by the second one-way particle release valve (8), a gas-solid mixture is formed, and then enters the carbon dioxide absorption chamber (3) through the outlet pipeline (2-1). In the carbon dioxide absorption chamber (3), the phase change material inside the composite carbon capture particles absorbs heat under the irradiation of near-infrared wavelength sunlight concentrated by the solar concentrator (4) and converted by the special glass, and at the same time, carbon dioxide is adsorbed on the carbon dioxide absorption film layer on the surface of the composite carbon capture particles. The gas-solid mixture enters the centrifugal separator (5) in the radial direction through the top pipeline (2-2). Under the action of the centrifugal separator (5), the gas after carbon capture is discharged from the gas outlet pipe at the top of the centrifugal separator (5). The composite carbon capture particles adsorbing carbon dioxide are discharged from the path (1-2), and the composite carbon capture particles falling into the bottom of the centrifugal separator (5). The first one-way particle release valve (6) is opened, and the composite carbon capture particles enter the carbon dioxide desorption chamber (7). The first one-way particle release valve (6) is closed, and the carbon dioxide in the composite carbon capture particles is desorbed under the sunlight collected by the solar concentrator (4) and filtered by the filter material. Subsequently, the composite carbon capture particles fall into the bottom of the carbon dioxide desorption chamber (7) and enter the lower pipeline (2-4). The second one-way particle release valve (8) is opened, and the composite carbon capture particles enter the gas-solid mixing chamber (2) to start the next cycle. The separated carbon dioxide passes through the particle filter layer (9) under the action of pressure, and is transported and collected through the side pipeline (3-5) and transported to the reactor inlet pipeline (3-1) for reuse. Step 2, carbon dioxide utilization: the first one-way control valve (13) is opened, the reaction solution enters the reactor (11) through the reactor inlet pipeline (3-1), and the first one-way control valve (13) is closed; the second one-way control valve (14) is closed; the pressure control valve (10) is opened, the carbon dioxide is increased in pressure after passing through the booster pump (16), and the carbon dioxide enters the reactor (11). After reaching the pressure required for the reaction, the pressure control valve (10) is closed; carbon dioxide hydrate is generated, the second one-way control valve (14) is opened, and carbon dioxide hydrate passes through the carbon dioxide hydrate outlet pipeline (3-2 ) enters the cold storage tank (12) for storage; when there is a demand for cooling, the third one-way control valve (15) is opened, and the carbon dioxide hydrate enters the heat exchanger (17) through the carbon dioxide hydrate outlet pipeline (3-4) to provide cooling to the user, and then enters the reaction solution replenisher (18) along the reaction solution replenisher inlet pipeline (3-6). After replenishment, the reaction solution leaves the reaction solution replenisher (18), the first one-way control valve (13) is opened, and the reaction solution enters the reactor (11) through the reaction solution inlet pipeline (3-3) driven by the circulation pump (19) to participate in the preparation of carbon dioxide hydrate.

Images