CN214937123U - Device for synthesizing methanol by using carbon dioxide and water - Google Patents
Device for synthesizing methanol by using carbon dioxide and water Download PDFInfo
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- CN214937123U CN214937123U CN202121240444.4U CN202121240444U CN214937123U CN 214937123 U CN214937123 U CN 214937123U CN 202121240444 U CN202121240444 U CN 202121240444U CN 214937123 U CN214937123 U CN 214937123U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The utility model belongs to the technical field of greenhouse gas reduces discharging and resource utilization, concretely relates to utilize device of carbon dioxide and hydration synthetic methyl alcohol. The utility model provides a use carbon dioxide andthe device for synthesizing the methanol by the water comprises an air carbon capture system and a methanol synthesis system; the air carbon capturing system comprises an air compression device, a carbon dioxide absorption device, a carbon dioxide regeneration device and a carbon dioxide storage device which are connected in sequence; the methanol synthesis system comprises a water storage device, a water heating device, a gas mixing device and a methanol synthesis device which are connected in sequence, wherein a gas outlet of the carbon dioxide storage device is connected with a carbon dioxide gas inlet of the gas mixing device; the methanol synthesis device is a dielectric barrier discharge reactor. The device for synthesizing methanol by using carbon dioxide and water can realize CO in the methanol synthesis process2The continuous supply of the raw materials saves the transportation cost of the raw materials, reduces the carbon emission and simultaneously realizes the CO2The resource utilization is realized.
Description
Technical Field
The utility model belongs to the technical field of greenhouse gas reduces discharging and resource utilization, concretely relates to utilize device of carbon dioxide and hydration synthetic methyl alcohol.
Background
Global climate change is the biggest threat of human sustainable development, non-traditional national security problem about survival development right is dealt with climate change, and CO is controlled by climate change2Discharge is the primary objective. CO is used in industry and power industry2Concentrated and stable emission source of (1) accounting for CO250% of the total amount of emissions. CO for these fixed point sources2Emission reduction, mainly by using CO2Capture and sequestration (CCUS) technology, a process with large scale CO2A technology with potential for emission reduction. However, in addition to industrial and power industriesCO of constant point source2Emissions, and also CO close to 50% of distributed source emissions2Carbon capture from air technology can be applied to CO of these distributed sources2And collecting and utilizing. Different from the carbon capture from coal-fired power plants by the CCUS technology, the direct carbon capture from the air is less limited by places and can be widely carried out in various places, and the direct carbon capture from the air can reduce CO in the air2The problem of 'stock' can be solved.
At present, people have more and more large demand on energy, the reserves of fossil fuels are gradually reduced, the problem of greenhouse effect caused by burning the fossil fuels is more and more serious, and how to use CO2The conversion of isothermal gases into valuable clean energy is a problem that needs to be solved urgently. The methanol being CO2One of hydrogenation products, which is saturated monohydric alcohol with the simplest structure, is used as a basic organic chemical raw material, has the consumption second to that of ethylene, propylene and benzene, and is mainly used in the fields of plastics, fine chemicals, petrochemical industry and the like. In addition, methanol is a new clean energy source, and can be used as a vehicle fuel due to good antiknock property and high octane number. Currently by CO industrially2And the process of preparing methanol by hydrogen generally needs to be carried out under the conditions of high temperature and high pressure (more than 200 ℃ and 30 atmospheres), and the conditions of high temperature and high pressure not only limit the large-scale production of methanol, but also cause additional energy waste.
Therefore, it is of great significance to develop a device for directly capturing carbon by air and synthesizing methanol by using carbon dioxide and water at normal temperature and pressure.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects that carbon dioxide in the air easily causes greenhouse effect and the preparation of methanol by utilizing the carbon dioxide needs to be carried out at high temperature and high pressure in the prior art, the device and the method for directly capturing carbon in the air and synthesizing methanol by utilizing the carbon dioxide and water at normal temperature and normal pressure are further provided.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
an apparatus for synthesizing methanol by using carbon dioxide and water comprises an air carbon capture system and a methanol synthesis system;
the air carbon capturing system comprises an air compression device, a carbon dioxide absorption device, a carbon dioxide regeneration device and a carbon dioxide storage device which are connected in sequence;
the methanol synthesis system comprises a water storage device, a water heating device, a gas mixing device and a methanol synthesis device which are connected in sequence, wherein a gas outlet of the carbon dioxide storage device is connected with a carbon dioxide gas inlet of the gas mixing device; the methanol synthesis device is a dielectric barrier discharge reactor.
Optionally, the air carbon capture system further comprises,
the heat exchange device is arranged between the carbon dioxide absorption device and the carbon dioxide regeneration device and is provided with a rich liquid inlet, a rich liquid outlet, a lean liquid inlet and a lean liquid outlet, the rich liquid inlet of the heat exchange device is connected with the rich liquid outlet of the carbon dioxide absorption device, and the rich liquid outlet of the heat exchange device is connected with the rich liquid inlet of the carbon dioxide regeneration device.
Optionally, a cold rich liquid pump is arranged between the rich liquid inlet of the heat exchange device and the rich liquid outlet of the carbon dioxide absorption device;
a rich liquid storage device and a hot rich liquid pump which are connected in sequence are arranged between the rich liquid outlet of the heat exchange device and the rich liquid inlet of the carbon dioxide regeneration device;
and a carbon dioxide compression device is arranged between the carbon dioxide regeneration device and the carbon dioxide storage device.
Optionally, the carbon dioxide regeneration device has a rich liquid inlet, a carbon dioxide outlet, a lean liquid inlet and a lean liquid outlet, and a hot lean liquid pump is arranged between the lean liquid outlet of the carbon dioxide regeneration device and the lean liquid inlet of the heat exchange device;
and a heating device is arranged between the barren liquor outlet and the barren liquor inlet of the carbon dioxide regeneration device.
Optionally, the carbon dioxide absorption device has an air inlet, a rich solution outlet, a lean solution inlet and an air outlet, the air outlet of the air compression device is connected to the air inlet of the carbon dioxide absorption device, and a lean solution storage device and a cold lean solution pump which are connected in sequence are arranged between the lean solution outlet of the heat exchange device and the lean solution inlet of the carbon dioxide absorption device.
Optionally, the gas mixing device is provided with a carbon dioxide gas inlet, a water vapor gas inlet and a mixed gas outlet, a carbon dioxide valve is arranged between the gas outlet of the carbon dioxide storage device and the carbon dioxide gas inlet of the gas mixing device, and a water vapor valve is arranged between the water heating device and the water vapor gas inlet of the gas mixing device; and a water pump is arranged between the water storage device and the water heating device.
Optionally, the carbon dioxide absorption device is a carbon dioxide absorption tower, and a carbon dioxide absorbent is arranged in the absorption tower;
the carbon dioxide regenerating device is a carbon dioxide regenerating tower.
Optionally, the system further comprises a renewable energy power generation system, and electricity generated by the renewable energy power generation system is used for supplying power to the air carbon capture system and the methanol synthesis system.
The utility model provides a method for synthesizing methanol by utilizing carbon dioxide and water, which is carried out by adopting the device.
Optionally, the method includes the following steps: when the renewable energy power generation system has electricity abandoning output, the air carbon capture system is driven to work, carbon dioxide is directly captured from air by using a chemical absorption method, and the captured carbon dioxide is reformed with water in the methanol synthesis system to synthesize methanol.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides an utilize device of carbon dioxide and water synthetic methanol utilizes the air to catch carbon system and directly catches carbon from the air, then utilizes medium barrier discharge reactor in the methanol synthesis system, CO based on plasma2Reforming with water to synthesize methanol, thereby realizing CO in the methanol synthesis process2The continuous supply of the raw materials saves the transportation cost of the raw materials, reduces the carbon emission and simultaneously realizes the CO2The resource utilization is realized.
Furthermore, electricity abandoning generated by the renewable energy power generation system is used for supplying power to the air carbon capture system and the methanol synthesis system, the renewable energy power generation system cannot be influenced, the problem of electricity abandoning of renewable energy is effectively solved, the renewable energy reserves are rich, the influence on the environment in the development and utilization process is small, and the fluctuation new energy is used for driving the carbon capture system to directly capture CO from the air2Can reduce CO in the air2Content of carbon and no additional CO generation during carbon capture2Is one of the important ways to alleviate global climate change. Utilizes a dielectric barrier discharge reactor, is based on a plasma technology, and actually utilizes CO at normal temperature and normal pressure2Resource utilization of, with CO2Compared with the preparation of methanol by hydrogen catalytic hydrogenation, the method reduces the reaction flow and avoids the additional energy consumption required by hydrogen production by water electrolysis. The renewable energy power generation, the direct air carbon capture and the methanol synthesis are effectively integrated, the whole system can flexibly operate, the system operates when electricity is abandoned, and the system can stop operating when the electricity is not abandoned; meanwhile, the existence of a rich solution storage device, a barren solution storage device, a carbon dioxide storage device and a water storage device leads the absorption link of the carbon capture, the analysis link of the carbon capture and CO2The utilization links are independently controlled, and the capacity of the integrated system for receiving the fluctuating new energy is improved. The equipment installation is less restricted by places, and the device is suitable for various places with renewable energy sources for power generation. Namely, the device provided by the utility model realizes the direct carbon capture and CO utilization of renewable energy driving air through the integration of the renewable energy power generation system, the air carbon capture system and the methanol synthesis system2The methanol is synthesized with water at normal temperature and normal pressure, thereby not only realizing the consumption of renewable energy resources and electricity, but also achieving carbon emission reduction and CO2Multiple goals of resource utilization.
Drawings
FIG. 1 is a schematic diagram of an apparatus for methanol synthesis using carbon dioxide and water according to the present invention;
FIG. 2 is a schematic diagram of an apparatus for the synthesis of methanol from carbon dioxide and water driven by a renewable energy power generation system according to the present invention;
FIG. 3 is a schematic diagram of a dielectric barrier discharge reactor.
Wherein: 1-a renewable energy power generation system; 2-an air carbon capture system; a 3-methanol synthesis system; 4-an air compression device; 5-a carbon dioxide absorption unit; 6-cold liquid enrichment pump; 7-a heat exchange device; 8-rich liquid storage device; 9-hot rich liquid pump; 10-a carbon dioxide regeneration unit; 11-a heating device; 12-hot barren liquor pump; 13-barren liquor storage means; 14-cold barren liquor pump; 15-a carbon dioxide compression unit; 16-a carbon dioxide storage device; 17-a carbon dioxide valve; 18-a gas mixing device; 19-a water storage means; 20-a water pump; 21-a water heating device; 22-a water vapor valve; 23-a methanol synthesis unit; 24-an air inlet pipe; 25-an air outlet pipe; 26-high voltage; 27-a ground electrode; 28-an insulating medium; 29-gas distributor.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1 and 2, the present invention provides an apparatus for synthesizing methanol using carbon dioxide and water, comprising an air carbon capture system 2 and a methanol synthesis system 3;
the air carbon capture system 2 comprises an air compression device 4, a carbon dioxide absorption device 5, a carbon dioxide regeneration device 10 and a carbon dioxide storage device 16 which are connected in sequence;
the methanol synthesis system 3 comprises a water storage device 19, a water heating device 21, a gas mixing device 18 and a methanol synthesis device 23 which are connected in sequence, wherein a gas outlet of the carbon dioxide storage device 16 is connected with a carbon dioxide gas inlet of the gas mixing device 18; the methanol synthesis device 23 is a dielectric barrier discharge reactor.
Optionally, the air compression device 4 is an air compressor, the carbon dioxide absorption device 5 is a carbon dioxide absorption tower, a carbon dioxide absorbent is arranged in the absorption tower, optionally, the carbon dioxide absorbent can be monoethanolamine, mixed amine or porous liquid, the porous liquid can be ZIF-8/ethylene glycol, ZSM-5/large-volume ionic liquid, and CO is passed through2Capture CO in air by chemical reaction with absorbent2。
Optionally, the carbon dioxide regeneration device 10 may be a carbon dioxide regeneration tower, the carbon dioxide rich solution is resolved in the regeneration tower under the action of high temperature to release carbon dioxide, and optionally, the temperature of the rich solution in the regeneration tower is controlled to be 110-.
Optionally, the carbon dioxide absorption tower and the regeneration tower are both packed towers, inert metal packing is adopted, and the packing is used for ensuring full contact of gas phase and liquid phase.
Optionally, the carbon dioxide storage device 16 is a carbon dioxide storage tank, the water storage device 19 is a water storage tank, the water heating device 21 is a water heater, and the gas mixing device 18 is a gas mixer.
Alternatively, the methanol synthesis apparatus 23 is a dielectric barrier discharge reactor, which is a conventional dielectric barrier discharge reactor in the art, and is commercially available or self-designed by the prior art. Optionally, as shown in fig. 3, the dielectric barrier discharge reactor is a dielectric barrier discharge device, and includes an air inlet pipe 24, an air outlet pipe 25, a high-level voltage 26, a ground electrode 27, an insulating medium 28, and a gas distributor 29; the mixed gas of carbon dioxide and water vapor enters from the inlet pipe 24, and the synthesized methanol gas is discharged from the outlet pipe 25.
The utility model provides an utilize device of carbon dioxide and water synthetic methanol utilizes the air to catch carbon system 2 and directly catches carbon from the air, then utilizes the medium to block the discharge reactor in the 3 synthetic system of methanol, CO based on plasma2Reforming with water to synthesize methanol, thereby realizing CO in the methanol synthesis process2The continuous supply of the raw materials saves the transportation cost of the raw materials, reduces the carbon emission and simultaneously realizes the CO2The resource utilization is realized.
In an alternative embodiment, as shown in fig. 2, the system further comprises a renewable energy power generation system 1, and the electricity discard generated by the renewable energy power generation system 1 supplies power to the air carbon capture system 2 and the methanol synthesis system 3. Alternatively, the renewable energy power generation system 1 may be a wind power generation system or a photovoltaic power generation system. Alternatively, the renewable energy power generation system 1 may power any component within the plant that requires energy to provide the required energy. Optionally, the renewable energy power generation system 1 is connected with a reboiler to provide heat for the regeneration tower, and the renewable energy power generation system 1 is connected with a water heater to heat water into steam; the renewable energy power generation system 1 is connected with the dielectric barrier discharge reactor, a plasma region is formed in the dielectric barrier discharge reactor after the power is on, the dielectric barrier discharge reaction is carried out, water molecules in the reaction are discharged and broken down to generate hydrogen ion groups with active chemical properties, and the hydrogen ion groups are further connected with CO2The reaction takes place to synthesize methanol. With CO2Plasma-based CO compared with hydrogen catalytic hydrogenation for methanol production2And the methanol is directly synthesized with water, so that the reaction flow is reduced, the extra energy consumption required by hydrogen production by water electrolysis can be avoided, and the energy utilization rate is greatly improved.
Optionally, in the gas mixer of the methanol synthesis system 3, to ensure CO2Full conversion, water vapor and CO2The molar ratio of the mixed gases is (6-12): 1.
the utility model discloses utilize the electricity of abandoning that renewable energy power generation system 1 produced to catch carbon system 2 and methyl alcohol synthesis system 3 power supply for the air, not only do notCan influence the renewable energy power generation system 1, effectively solves the problem of electricity abandonment of renewable energy, has rich renewable energy reserves, has less influence on the environment in the development and utilization processes, and utilizes the fluctuating new energy to drive the carbon capture system to directly capture CO from the air2Can reduce CO in the air2Content of carbon and no additional CO generation during carbon capture2Is one of the important ways to alleviate global climate change. Utilizes a dielectric barrier discharge reactor, is based on a plasma technology, and actually utilizes CO at normal temperature and normal pressure2Resource utilization of, with CO2Compared with the preparation of methanol by hydrogen catalytic hydrogenation, the method reduces the reaction flow and avoids the additional energy consumption required by hydrogen production by water electrolysis. The renewable energy power generation, the direct air carbon capture and the methanol synthesis are effectively integrated, the whole system can flexibly operate, the system operates when electricity is abandoned, and the system can stop operating when the electricity is not abandoned; meanwhile, the rich solution storage device 8, the barren solution storage device 13, the carbon dioxide storage device 16 and the water storage device 19 are arranged, and the absorption link of the carbon capture, the analysis link of the carbon capture, the CO are carried out2The utilization links are independently controlled, and the capacity of the integrated system for receiving the fluctuating new energy is improved. The equipment installation is less restricted by places, and the device is suitable for various places with renewable energy sources for power generation. Namely, the device provided by the utility model realizes the direct carbon capture and CO utilization of renewable energy driving air through the integration of the renewable energy power generation system, the air carbon capture system 2 and the methanol synthesis system 32The methanol is synthesized with water at normal temperature and normal pressure, thereby not only realizing the consumption of renewable energy resources and electricity, but also achieving carbon emission reduction and CO2Multiple goals of resource utilization.
In an alternative embodiment, the air carbon capture system 2 further comprises,
the heat exchange device 7 is arranged between the carbon dioxide absorption device 5 and the carbon dioxide regeneration device 10, the heat exchange device 7 is provided with a rich liquid inlet, a rich liquid outlet, a lean liquid inlet and a lean liquid outlet, the rich liquid inlet of the heat exchange device 7 is connected with the rich liquid outlet of the carbon dioxide absorption device 5, and the rich liquid outlet of the heat exchange device 7 is connected with the rich liquid inlet of the carbon dioxide regeneration device 10.
Optionally, the heat exchange device 7 is a heat exchanger, and the heat exchanger is connected between the absorption tower and the rich liquid storage tank, so that the utilization rate of energy sources is improved, and the cost is reduced.
In an optional embodiment, a cold rich liquid pump 6 is arranged between the rich liquid inlet of the heat exchange device 7 and the rich liquid outlet of the carbon dioxide absorption device 5;
a rich liquid storage device 8 and a hot rich liquid pump 9 which are connected in sequence are arranged between the rich liquid outlet of the heat exchange device 7 and the rich liquid inlet of the carbon dioxide regeneration device 10; optionally, the rich liquid storage device 8 is a rich liquid storage tank.
A carbon dioxide compression device 15 is provided between the carbon dioxide regeneration device 10 and the carbon dioxide storage device 16. Optionally, the carbon dioxide compression device 15 is a carbon dioxide compressor.
In an alternative embodiment, the carbon dioxide regeneration device 10 has a rich liquid inlet, a carbon dioxide outlet, a lean liquid inlet and a lean liquid outlet, and a hot lean liquid pump 12 is arranged between the lean liquid outlet of the carbon dioxide regeneration device 10 and the lean liquid inlet of the heat exchange device 7;
a heating device 11 is arranged between the barren liquor outlet and the barren liquor inlet of the carbon dioxide regeneration device 10. Optionally, the heating device 11 is a reboiler. The utility model discloses be equipped with the reboiler bottom the regenerator, CO in the mode through reboiler heating with the pregnant solution2Separated from the absorbent.
In an alternative embodiment, the carbon dioxide absorption device 5 has an air inlet, a rich liquid outlet, a lean liquid inlet and an air outlet, the air outlet of the air compression device 4 is connected with the air inlet of the carbon dioxide absorption device 5, and a lean liquid storage device 13 and a cold lean liquid pump 14 which are connected in sequence are arranged between the lean liquid outlet of the heat exchange device 7 and the lean liquid inlet of the carbon dioxide absorption device 5. Optionally, the lean solution storage device 13 is a lean solution storage tank.
In an alternative embodiment, the gas mixing device 18 has a carbon dioxide gas inlet, a water vapor gas inlet and a mixed gas outlet, a carbon dioxide valve 17 is arranged between the gas outlet of the carbon dioxide storage device 16 and the carbon dioxide gas inlet of the gas mixing device 18, and a water vapor valve 22 is arranged between the water heating device 21 and the water vapor gas inlet of the gas mixing device 18; a water pump 20 is arranged between the water storage device 19 and the water heating device 21.
The utility model also provides a method for utilizing carbon dioxide and water to synthesize methanol, which adopts the device.
Optionally, the method includes the following steps: when the renewable energy power generation system 1 has the electricity abandoning output, the air carbon capture system 2 is driven to work, carbon dioxide is directly captured from the air by using a chemical absorption method, and the captured carbon dioxide is reformed and synthesized with water in the methanol synthesis system 3 to form methanol.
The electricity abandoned in the renewable energy power generation system 1 of the utility model supplies power for the air carbon capture system 2 and the methanol synthesis system 3; air enters a carbon dioxide absorption tower through an air compressor, and carbon in the absorption tower traps CO by a chemical absorbent (monoethanolamine, mixed amine or porous liquid)2Selectively absorbing CO2The rich liquid flows out from a rich liquid outlet at the bottom of the absorption tower and then enters a rich liquid storage tank through a heat exchanger; the rich liquid in the rich liquid storage tank is conveyed to a carbon dioxide regeneration tower through a pipeline for CO2Regenerating, wherein the regenerated barren solution containing the absorbent flows out from the bottom of the regeneration tower and is conveyed to a barren solution storage tank for later use through a heat exchanger; CO obtained in the regeneration process2The gas is sent to a carbon dioxide storage tank through a carbon dioxide compressor; the water in the water storage tank passes through the water heater and then is mixed with CO in the carbon dioxide storage tank2The mixed gas is mixed in a gas mixer, and then the mixed gas is sent to a methanol synthesis device 23 through a pipeline for reaction, so that methanol is obtained.
The solution according to the invention is illustrated below by means of specific examples.
Example 1
Referring to fig. 1 and 2, the present embodiment provides an apparatus for synthesizing methanol using carbon dioxide and water, including an air carbon capture system 2 and a methanol synthesis system 3;
the air carbon capture system 2 comprises an air compression device 4, a carbon dioxide absorption device 5, a carbon dioxide regeneration device 10 and a carbon dioxide storage device 16 which are connected in sequence;
the methanol synthesis system 3 comprises a water storage device 19, a water heating device 21, a gas mixing device 18 and a methanol synthesis device 23 which are connected in sequence, wherein a gas outlet of the carbon dioxide storage device 16 is connected with a carbon dioxide gas inlet of the gas mixing device 18; the methanol synthesis device 23 is a dielectric barrier discharge reactor;
the air compression device 4 is an air compressor, the carbon dioxide absorption device 5 is a carbon dioxide absorption tower, a carbon dioxide absorbent is arranged in the absorption tower, and the carbon dioxide absorbent is monoethanolamine;
the carbon dioxide regenerating device 10 can be a regenerating tower, carbon dioxide rich liquid is analyzed in the regenerating tower under the action of high temperature to release carbon dioxide, and the temperature of the rich liquid in the regenerating tower is controlled to be 110 ℃;
the carbon dioxide storage device 16 is a carbon dioxide storage tank, the water storage device 19 is a water storage tank, the water heating device 21 is a water heater, and the gas mixing device 18 is a gas mixer;
the methanol synthesis device 23 is a dielectric barrier discharge reactor, as shown in fig. 3, the dielectric barrier discharge reactor includes an air inlet pipe 24, an air outlet pipe 25, a high-level voltage 26, a ground electrode 27, an insulating medium 28, and a gas distributor 29;
the air carbon capture system 2 further comprises,
the heat exchange device 7 is arranged between the carbon dioxide absorption device 5 and the carbon dioxide regeneration device 10, the heat exchange device 7 is provided with a rich liquid inlet, a rich liquid outlet, a lean liquid inlet and a lean liquid outlet, the rich liquid inlet of the heat exchange device 7 is connected with the rich liquid outlet of the carbon dioxide absorption device 5, and the rich liquid outlet of the heat exchange device 7 is connected with the rich liquid inlet of the carbon dioxide regeneration device 10;
as shown in fig. 2, the system further comprises a renewable energy power generation system 1, wherein electricity abandoned by the renewable energy power generation system 1 supplies power to an air carbon capture system 2 and a methanol synthesis system 3, and the renewable energy power generation system 1 can be a wind power generation system;
the heat exchange device 7 is a heat exchanger, and a cold rich liquid pump 6 is arranged between a rich liquid inlet of the heat exchange device 7 and a rich liquid outlet of the carbon dioxide absorption device 5;
a rich liquid storage device 8 and a hot rich liquid pump 9 which are connected in sequence are arranged between the rich liquid outlet of the heat exchange device 7 and the rich liquid inlet of the carbon dioxide regeneration device 10; optionally, the rich liquid storage device 8 is a rich liquid storage tank;
a carbon dioxide compression device 15 is provided between the carbon dioxide regeneration device 10 and the carbon dioxide storage device 16. The carbon dioxide compression device 15 is a carbon dioxide compressor;
the carbon dioxide regeneration device 10 is provided with a rich liquid inlet, a carbon dioxide outlet, a barren liquid inlet and a barren liquid outlet, and a hot barren liquid pump 12 is arranged between the barren liquid outlet of the carbon dioxide regeneration device 10 and the barren liquid inlet of the heat exchange device 7;
a heating device 11 is arranged between the barren liquor outlet and the barren liquor inlet of the carbon dioxide regeneration device 10.
The heating device 11 is a reboiler;
the carbon dioxide absorption device 5 is provided with an air inlet, a rich solution outlet, a lean solution inlet and an air outlet, the air outlet of the air compression device 4 is connected with the air inlet of the carbon dioxide absorption device 5, and a lean solution storage device 13 and a cold lean solution pump 14 which are sequentially connected are arranged between the lean solution outlet of the heat exchange device 7 and the lean solution inlet of the carbon dioxide absorption device 5. The barren liquor storage device 13 is a barren liquor storage tank;
the gas mixing device 18 is provided with a carbon dioxide gas inlet, a water vapor gas inlet and a mixed gas outlet, a carbon dioxide valve 17 is arranged between the gas outlet of the carbon dioxide storage device 16 and the carbon dioxide gas inlet of the gas mixing device 18, and a water vapor valve 22 is arranged between the water heating device 21 and the water vapor gas inlet of the gas mixing device 18; a water pump 20 is arranged between the water storage device 19 and the water heating device 21;
based on the above device for CO2Preparing methanol: when in useWhen the renewable energy power generation system 1 has the electricity abandoning output, the air carbon capturing system 2 is driven to work, and monoethanolamine is used as a chemical absorbent to directly capture CO from the air2(ii) a In the methanol synthesis system 3, steam and CO2The gas is as follows: 1, and reforming the mixture into methanol under the action of plasma at normal temperature and normal pressure.
Example 2
This example provides an apparatus for methanol synthesis using carbon dioxide and water, which is different from example 1 in that the renewable energy power generation system 1 is a photovoltaic power generation system, a porous liquid (ZIF-8/ethylene glycol) is used as a chemical absorbent, and water vapor and CO are mixed in a methanol synthesis system 32The gas is mixed according to the ratio of 10: 1, and reforming the mixture into methanol under the action of plasma at normal temperature and normal pressure.
Example 3
This example provides an apparatus for methanol synthesis using carbon dioxide and water, which differs from example 1 in that the renewable energy power generation system 1 is a wind power generation system, a porous liquid (ZSM-5/bulk ionic liquid) is used as a chemical absorbent, and water vapor and CO are mixed in a methanol synthesis system 32The gas is mixed according to the weight ratio of 12: 1, and reforming the mixture into methanol under the action of plasma at normal temperature and normal pressure.
Example 4
The embodiment provides a method for synthesizing methanol by using carbon dioxide and water, which is carried out by adopting the device, and comprises the following steps:
electricity abandoned in the renewable energy power generation system 1 supplies power to the air carbon capture system 2 and the methanol synthesis system 3; air enters the bottom of the carbon dioxide absorption tower through an air compressor, barren liquor from a barren liquor storage tank enters the absorption tower from the top of the tower after passing through a cold barren liquor pump 14, an absorbent in the absorption tower is in reverse contact with the air, and the absorbent is used for absorbing CO2Selectively absorbing, discharging the decarbonized air into the atmosphere from the top of the absorption tower to absorb CO2The rich liquid flows out from a rich liquid outlet at the bottom of the absorption tower, exchanges heat with lean liquid from the regeneration tower at a heat exchanger through a cold rich liquid pump 6, and flows to a rich liquid storage tank for storage；
When the regeneration tower works, rich liquid in the rich liquid storage tank enters the regeneration tower through a hot rich liquid pump 9 for regeneration, a reboiler is arranged at the tower bottom and is driven by the renewable energy power generation system 1 to provide heat for the regeneration tower; the barren solution regenerated from the regeneration tower passes through a hot barren solution pump 12, exchanges heat with cold rich solution from the absorption tower at a heat exchanger, flows to a barren solution storage tank, and is continuously recycled;
CO coming out of the top of the regeneration column2The gas enters a carbon dioxide storage tank for storage through a carbon dioxide compressor and is used for synthesizing methanol;
in the methanol synthesis system 3, water in a water storage tank enters a water heater for gasification after passing through a water pump 20, electric energy required by the water heater comes from the renewable energy power generation system 1, and gasified water vapor enters a gas mixer after passing through a water vapor valve 22; CO from air carbon capture System 22The gas enters the gas mixer from the carbon dioxide storage tank through the carbon dioxide valve 17; at the gas mixer, water vapor and CO2The gas is mixed according to the ratio of 10: 1, then the mixed gas enters a methanol synthesis device 23, and CO is reformed by utilizing dielectric barrier discharge cold plasma at normal temperature and normal pressure2The methanol synthesizer 23 and the renewable energy power generation system 1 are electrified to form a plasma region for a dielectric barrier discharge reaction, water molecules in the reaction are discharged and broken down to generate hydrogen ion groups with active chemical properties, and the hydrogen ion groups are further reacted with CO2The reaction takes place to synthesize methanol.
The utility model provides an utilize device of carbon dioxide and water synthesis methyl alcohol when renewable energy power generation system 1 has abandon electricity output, and the carbon system 2 work is caught to the drive air, utilizes the chemical absorption method directly to catch carbon dioxide from the air, and the carbon dioxide that the entrapment obtained is at methyl alcohol synthesis system 3, under the plasma effect, and under the reaction condition of normal atmospheric temperature normal pressure with the water reforming for methyl alcohol. The device mainly comprises a renewable energy power generation system 1, an air carbon capture system 2 and a methanol synthesis system 3. The system is integrated as follows: the electricity generated by the renewable energy system provides electricity consumption and heat for the air carbon capture system 2 and the methanol synthesis system 3The air carbon capture system 2 adopts a chemical absorption method to absorb CO in the air2Collecting the obtained CO2Mixing with water at a certain proportion, introducing into methanol synthesis device 23, and reacting CO under the action of plasma at normal temperature and pressure2And water reforming to methanol. The utility model discloses utilize the electricity of abandoning that renewable energy produced to drive whole integrated system, realized CO under normal atmospheric temperature and pressure2Reforming the carbon into methanol, effectively improving the consumption capability of renewable energy power generation, reducing carbon emission and realizing CO2Resource utilization is carried out; in addition, the rich liquid storage tank, the lean liquid storage tank and the CO are used2Due to the existence of the storage tank and the water storage tank, the integrated system can flexibly operate and has higher capability of receiving fluctuating new energy.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (8)
1. An apparatus for synthesizing methanol by using carbon dioxide and water is characterized by comprising an air carbon capture system and a methanol synthesis system;
the air carbon capturing system comprises an air compression device, a carbon dioxide absorption device, a carbon dioxide regeneration device and a carbon dioxide storage device which are connected in sequence;
the methanol synthesis system comprises a water storage device, a water heating device, a gas mixing device and a methanol synthesis device which are connected in sequence, wherein a gas outlet of the carbon dioxide storage device is connected with a carbon dioxide gas inlet of the gas mixing device; the methanol synthesis device is a dielectric barrier discharge reactor.
2. The apparatus for methanol synthesis using carbon dioxide and water according to claim 1, wherein the air carbon capture system further comprises,
the heat exchange device is arranged between the carbon dioxide absorption device and the carbon dioxide regeneration device and is provided with a rich liquid inlet, a rich liquid outlet, a lean liquid inlet and a lean liquid outlet, the rich liquid inlet of the heat exchange device is connected with the rich liquid outlet of the carbon dioxide absorption device, and the rich liquid outlet of the heat exchange device is connected with the rich liquid inlet of the carbon dioxide regeneration device.
3. The apparatus for synthesizing methanol from carbon dioxide and water according to claim 2, wherein a cold rich liquid pump is arranged between the rich liquid inlet of the heat exchange device and the rich liquid outlet of the carbon dioxide absorption device;
a rich liquid storage device and a hot rich liquid pump which are connected in sequence are arranged between the rich liquid outlet of the heat exchange device and the rich liquid inlet of the carbon dioxide regeneration device;
and a carbon dioxide compression device is arranged between the carbon dioxide regeneration device and the carbon dioxide storage device.
4. The apparatus for synthesizing methanol using carbon dioxide and water according to claim 3, wherein the carbon dioxide regeneration apparatus has a rich liquid inlet, a carbon dioxide outlet, a lean liquid inlet and a lean liquid outlet, and a hot lean liquid pump is disposed between the lean liquid outlet of the carbon dioxide regeneration apparatus and the lean liquid inlet of the heat exchange apparatus;
and a heating device is arranged between the barren liquor outlet and the barren liquor inlet of the carbon dioxide regeneration device.
5. The apparatus for synthesizing methanol from carbon dioxide and water according to claim 4, wherein the carbon dioxide absorption device has an air inlet, a rich liquid outlet, a lean liquid inlet and an air outlet, the air outlet of the air compression device is connected with the air inlet of the carbon dioxide absorption device, and a lean liquid storage device and a cold lean liquid pump which are connected in sequence are arranged between the lean liquid outlet of the heat exchange device and the lean liquid inlet of the carbon dioxide absorption device.
6. The apparatus for synthesizing methanol using carbon dioxide and water according to claim 5, wherein the gas mixing device has a carbon dioxide inlet, a water vapor inlet and a mixed gas outlet, a carbon dioxide valve is disposed between the outlet of the carbon dioxide storage device and the carbon dioxide inlet of the gas mixing device, and a water vapor valve is disposed between the water heating device and the water vapor inlet of the gas mixing device; and a water pump is arranged between the water storage device and the water heating device.
7. The apparatus for synthesizing methanol using carbon dioxide and water according to claim 1, wherein the carbon dioxide absorption apparatus is a carbon dioxide absorption tower, and a carbon dioxide absorbent is disposed in the absorption tower;
the carbon dioxide regenerating device is a carbon dioxide regenerating tower.
8. The apparatus for utilizing carbon dioxide and water to form methanol according to claim 1, further comprising a renewable energy power generation system, wherein the electricity discard generated by the renewable energy power generation system powers the air carbon capture system and the methanol synthesis system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022253256A1 (en) * | 2021-06-03 | 2022-12-08 | 中国华能集团清洁能源技术研究院有限公司 | Device and method for synthesizing methanol by using carbon dioxide and water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022253256A1 (en) * | 2021-06-03 | 2022-12-08 | 中国华能集团清洁能源技术研究院有限公司 | Device and method for synthesizing methanol by using carbon dioxide and water |
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