CN212505091U - Intermittent carbon dioxide capture and conversion coupling device - Google Patents

Intermittent carbon dioxide capture and conversion coupling device Download PDF

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Publication number
CN212505091U
CN212505091U CN202020856699.2U CN202020856699U CN212505091U CN 212505091 U CN212505091 U CN 212505091U CN 202020856699 U CN202020856699 U CN 202020856699U CN 212505091 U CN212505091 U CN 212505091U
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methanol
membrane
carbon dioxide
inlet
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朱建军
徐德全
黄少轩
王梓程
刘师承
李娜
周屈兰
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Xian Jiaotong University
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Xian Jiaotong University
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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
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight
    • 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
    • Y02P20/50—Improvements relating to the production of bulk chemicals

Abstract

The utility model discloses a device of intermittent type formula carbon dioxide entrapment and conversion coupling, include: CO22Trap, CO2Desorption apparatus, CO2A catalytic conversion device and a methanol membrane separation device; CO22The catcher is provided with a rich liquid outlet and a lean liquid inlet; CO22The desorption device is provided with a rich liquid inlet, an alkali liquor inlet and an alkali liquor outlet; wherein, CO2The desorption device is provided with CO2Separation membrane for separating CO from rich liquid2；CO2The catalytic conversion device is provided with a proton exchange membrane for transferring hydrogen ions between the cathode and the anode; the methanol membrane separation device is provided with a methanol separation membrane for separating methanol aqueous solution. The utility model can realize the capture of low-concentration carbon dioxide, and can be converted on the spot after capture, so as to reduce the storage and transportation cost; the solar energy is utilized to supply energy to the carbon dioxide capture and CO2 catalytic conversion device, so that the energy consumption can be reduced, and the economical efficiency can be improved.

Description

Intermittent carbon dioxide capture and conversion coupling device
Technical Field
The utility model belongs to the technical field of carbon dioxide entrapment and carbon dioxide catalytic conversion, in particular to device of intermittent type formula carbon dioxide entrapment and conversion coupling.
Background
The existing carbon dioxide capture technology is relatively mature at home and abroad, and a large area of carbon capture technology is adopted in a plurality of large-scale power plants for reducing the carbon emission; however, the current industrial application of the capture technology of capture after combustion is only achieved, and the capture technology is only carried out in the environment with high carbon dioxide concentration, and the cost is extremely high. Secondly, chemically converting carbon dioxide is a one-time and perpetual strategy for solving the problem of carbon emission, and the existing carbon dioxide capture technology cannot chemically convert carbon dioxide in the subsequent process. Moreover, the current common technology for single thermal catalytic conversion of carbon dioxide in industry has the disadvantages of high energy consumption, high cost, low conversion efficiency and the like, and is not beneficial to efficient sustainable development.
In summary, with the increasing demands for environmental protection, energy consumption reduction, economy and the like, the existing carbon dioxide capture technology and the single thermal catalytic conversion technology have been unable to meet the demands, and a new device for coupling the intermittent carbon dioxide capture and conversion is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an intermittent type formula carbon dioxide entrapment and conversion coupled device to solve one or more technical problem that above-mentioned existence. The utility model can realize the capture of low-concentration carbon dioxide, and can be converted on the spot after capture, so as to reduce the storage and transportation cost; the solar energy is utilized to supply energy to the carbon dioxide capture and CO2 catalytic conversion device, so that the energy consumption can be reduced, and the economical efficiency can be improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a device of intermittent type formula carbon dioxide entrapment and conversion coupling, include: CO22Trap, CO2Desorption apparatus, CO2A catalytic conversion device and a methanol membrane separation device;
the CO is2The catcher is provided with a rich liquid outlet and a lean liquid inlet;
the CO is2The desorption device is provided with a rich liquid inlet, an alkali liquor inlet and an alkali liquor outlet; wherein said CO is2The desorption device is provided with CO2Separation membrane for separating CO from rich liquid2；
The CO is2The catalytic conversion device is provided with a first feed port, a negative electrode, a positive electrode, a balance port and a product outlet; wherein said CO is2The catalytic conversion device is provided with a proton exchange membrane for transferring hydrogen ions between the cathode and the anode;
the methanol membrane separation device is provided with a second feed inlet, an unvolated outlet and a steam outlet; wherein the methanol membrane separation device is provided with a methanol separation membrane for separating methanol aqueous solution;
wherein said CO is2The rich liquid outlet of the trap is communicated with the CO through a rich liquid transmission pipeline2The rich liquid inlet of the desorption device is connectedOpening; the CO is2An alkali liquor outlet of the desorption device is communicated with the CO through a first pipeline2The first feed inlets of the catalytic conversion devices are communicated; the CO is2And a product outlet of the catalytic conversion device is communicated with the second feed inlet of the methanol membrane separation device through a product conveying pipeline.
The further improvement of the utility model lies in that the non-transparent outlet of the methanol membrane separation device passes through the second pipeline and the CO2The first feed inlet of the catalytic conversion device is communicated with the second feed inlet of the catalytic conversion device;
the CO is2The desorption device is provided with a barren solution outlet which is communicated with CO through a barren solution transmission pipeline2The barren liquor inlet of the catcher is communicated;
the first pipeline is provided with a valve for controlling the flow of the alkaline liquor introduced into the catalytic conversion device and balancing CO2The rate difference between the two processes of capture and catalytic conversion.
The utility model discloses a further improvement lies in, still includes: a condenser;
the steam outlet of the methanol membrane separation device is communicated with the inlet of the condenser;
the condenser is provided with a methanol outlet for outputting methanol.
The further improvement of the utility model lies in that CO2The trap comprises: hyperbolic CO2The device comprises a trapping tower, an air extraction device, a barren liquor pool, a trapping filler, a rich liquor outlet and a pressurizing nozzle;
hyperbolic CO2The outer wall of the capturing tower is provided with a solar energy absorbing coating which is used for absorbing gas in the solar energy heating tower;
hyperbolic CO2The top of the trapping tower is provided with an air extractor, and the bottom of the trapping tower is provided with a rich liquid outlet;
a barren liquor pool and a trapping filler are sequentially arranged between the air extraction device and the rich liquor outlet from top to bottom;
the barren liquor pool is provided with a plurality of outlets, and the outlets are provided with pressurizing nozzles; and an inlet of the barren liquor pool is provided with a barren liquor transmission pipeline which is used for being communicated with the outside.
The utility model has the further improvement that the barren liquor conveying pipeline is provided with a throttle valve; the trapping filler is a plurality of layers of trapping fillers, and the trapping fillers of all layers are supported by a truss structure.
The further improvement of the utility model lies in that CO2The desorption device comprises: vacuum heat-insulating layer, phase-change material heat storage layer, rich liquid flow channel and CO2The device comprises a separation membrane, an alkali liquor flow channel, a first shell and a first solar heat collector;
the first shell is arranged on the first solar heat collector and used for carrying out radiant heating on the inner area of the first shell through the first solar heat collector;
a vacuum heat-insulating layer and a phase-change material heat-accumulating layer are sequentially arranged in the first shell from outside to inside;
CO is arranged in the phase-change material heat storage layer2A separation membrane; wherein said CO is2The separation membrane divides an area in the phase change material heat accumulation layer into a rich liquid flow channel and an alkali liquor flow channel; the alkali liquor flow passage is provided with an alkali liquor inlet and an alkali liquor outlet, and the rich liquor flow passage is provided with a rich liquor inlet and a lean liquor outlet.
The further improvement of the utility model lies in that CO2The catalytic conversion device includes: the device comprises a first feed port, a negative electrode, a proton exchange membrane, a second shell, a product outlet, a balance port, a positive electrode and a second solar heat collector;
the second shell is arranged on the second solar heat collector; a proton exchange membrane is arranged in the second shell; the proton exchange membrane divides the area in the second shell into a third chamber and a fourth chamber; one end of the third chamber is provided with a first feeding hole and a negative electrode, and the other end of the third chamber is provided with a product outlet; one end of the fourth chamber is provided with a balance port and a positive electrode.
The utility model discloses a further improvement lies in, methyl alcohol membrane separation device includes: the second feeding hole, the methanol separation membrane, the third shell, the non-permeable outlet, the steam outlet and the third solar heat collector;
the third shell is arranged on a third solar heat collector, and the third solar heat collector is used for absorbing solar energy to heat the third shell; a cavity is arranged in the third shell, and a methanol separation membrane is arranged in the cavity; the methanol separation membrane divides the cavity into a first cavity and a second cavity; one end of the first chamber is provided with a second feeding hole, the other end of the first chamber is provided with an unvented port, and the second chamber is provided with a steam outlet; the non-permeable outlet and the steam outlet are arranged at the same end of the cavity.
The further improvement of the utility model lies in that CO2The separation membrane is a polyimide polymer membrane; the methanol separation membrane may be a cellulose acetate membrane.
Compared with the prior art, the utility model discloses following beneficial effect has:
the device of the utility model can realize low concentration (350-450 ml/m)3) The carbon dioxide can be captured and converted on site after capture, so that the storage and transportation cost is reduced; the solar energy is utilized to supply energy to the carbon dioxide capture and CO2 catalytic conversion device, so that the energy consumption can be reduced, and the economical efficiency can be improved. The utility model can use the valve to connect the CO2The capture section is isolated from the conversion section, so that the intermittent operation of the system is realized, and CO can be captured at night2And the sufficient illumination can be performed by CO simultaneously in the daytime2The capturing and catalytic conversion processes fully consider the speed difference of capturing and conversion, and fully utilize the solar energy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram of an apparatus for batch carbon dioxide capture and conversion coupling in accordance with an embodiment of the present invention;
FIG. 2 shows an embodiment of the present invention, in which CO is in the shape of a cooling tower hyperboloid2A schematic view of the trap;
FIG. 3 shows an embodiment of the present invention, in which CO is2A schematic diagram of a desorption apparatus;
FIG. 4 shows an embodiment of the present invention, in which CO is2A schematic diagram of a catalytic conversion unit;
FIG. 5 is a schematic diagram of a methanol membrane separation device in an embodiment of the present invention;
FIG. 6 is a schematic flow diagram of a method of operating an intermittent carbon dioxide capture and conversion coupled device in accordance with an embodiment of the present invention;
in FIGS. 1 to 6, 1, CO2A trap; 2. CO22A desorption device; 3. a rich liquid transfer pipeline; 4. a barren liquor transfer line; 5. a pump; 6. a valve; 8. CO22A catalytic conversion device; 9. a methanol membrane separation device; 10. a condenser; 11. a first pipeline;
101. hyperbolic CO2A capturing tower; 102. an air extraction device; 103. a barren liquor pool; 104. a throttle valve; 105. trapping the filler; 106. a rich liquid outlet; 107. a rich liquor pool; 108. a pressurized spray head;
201. a vacuum heat-insulating layer; 202. a phase change material heat storage layer; 203. a rich liquid flow passage; 204. CO22A separation membrane; 205. an alkali liquor flow channel; 206. a first housing; 207. a first solar collector;
801. a first feed port; 802. a negative electrode; 803. a proton exchange membrane; 804. a second housing; 805. a product outlet; 806. a balancing port; 807. a positive electrode; 808. a second solar collector;
901. a second feed port; 902. a methanol separation membrane; 903. a third housing; 904. an impenetrable outlet; 905. a steam outlet; 906. and a third solar collector.
Detailed Description
In order to make the purpose, technical effect and technical solution of the embodiments of the present invention clearer, the following description, with reference to the drawings in the embodiments of the present invention, clearly and completely describes the technical solution in the embodiments of the present invention; obviously, the described embodiments are some of the embodiments of the present invention. Based on the embodiments disclosed in the present invention, other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Referring to fig. 1, an apparatus for coupling capturing and converting carbon dioxide intermittently according to an embodiment of the present invention includes: quasi-cooling tower type hyperboloid CO2Trap 1, CO2Desorption apparatus 2, CO2A catalytic conversion device 8 and a methanol membrane separation device 9;
the CO is2The catcher is provided with a rich liquid outlet and a lean liquid inlet 1;
the CO is2The desorption device 2 is provided with a rich liquid inlet, a lean liquid outlet, an alkali liquid inlet and an alkali liquid outlet; wherein is provided with CO2 A separation membrane 204 for separating CO from the rich liquid2(ii) a Wherein, CO2The separation membrane 204 may be a polyimide polymer membrane;
the CO is2The catalytic conversion device 8 is provided with a first feed port 801, a negative electrode 802, a positive electrode 807, a balance port 806, and a product outlet 805; wherein a proton exchange membrane 803 is provided for transferring hydrogen ions between the cathode and the anode;
the methanol membrane separation device 9 is provided with a second feed inlet 901, an unvented outlet 904 and a vapor outlet 905; wherein, a methanol separation membrane 902 is arranged for separating methanol aqueous solution; wherein, the methanol separation membrane can be a cellulose acetate membrane.
In the embodiment of the utility model, CO2The rich liquid outlet of the catcher 1 is communicated with the CO through a rich liquid transmission pipeline 32The rich liquid inlet of the desorption device 2 is communicated; wherein the rich liquid transfer pipeline 3 is provided with a pump 5 for pumping the rich liquid.
In the embodiment of the utility model, CO2The lean solution outlet of the desorption device 2 is communicated with CO through a lean solution transmission pipeline 42The barren liquor inlet of the catcher 1 is communicated; wherein the lean liquid conveying pipeline 4 is provided with a pump 5 for pumping the lean liquid; CO22An alkali liquor outlet of the desorption device 2 is communicated with CO through a first pipeline 112The first feed port 801 of the catalytic conversion device 8 is communicated; wherein the first pipeline 11 is provided with a valve 6 for controlling the flow of the alkaline liquid introduced into the catalytic conversion device and balancing CO2The two processes of capturing and catalytic conversionThe rate difference between them.
In the embodiment of the utility model, CO2The catalytic converter 8 is powered by solar heat collector and CO2The product outlet 805 of the catalytic conversion device 8 is communicated with the second feed inlet 901 of the methanol membrane separation device 9 through a product conveying pipeline; wherein the product transfer line is provided with a pump 5 for pumping CO2The product of catalytic converter 8;
the non-permeable outlet 904 of the methanol membrane separation device 9 is communicated with CO through a second pipeline2The first inlet 801 of the catalytic conversion device 8 is communicated; wherein, the second pipeline is provided with a pump 5 for pumping the impermeable raw material for secondary catalytic conversion;
the embodiment of the utility model provides an in, still include: a condenser 10; a steam outlet 905 of the methanol membrane separation device 9 is communicated with an inlet of a condenser 10, and the condenser 10 is provided with a methanol outlet for outputting methanol; wherein, the methanol outlet can be used as the product outlet of the whole device.
Referring to FIG. 2, in the embodiment of the present invention, CO2The trap 1 comprises: hyperbolic CO2 A capture tower 101, an air extractor 102, a lean solution pool 103, a capture packing 105, a rich solution outlet 106 and a pressurizing spray head 108.
Hyperbolic CO2The outer wall of the capturing tower 101 is provided with a solar energy absorbing coating for absorbing gas in the solar energy heating tower;
hyperbolic CO2The top of the capturing tower 101 is provided with an air extractor 102, and the bottom is provided with a rich liquid outlet 106;
a lean liquid pool 103 and a trapping filler 105 are arranged between the air extraction device 102 and the rich liquid outlet 106 from top to bottom in sequence;
the barren liquor pool 103 is provided with a plurality of outlets, and the outlets are provided with pressurizing nozzles 108; an inlet of the lean liquid pool 103 is provided with a lean liquid transfer pipe 4 for communicating with the outside.
In the embodiment of the present invention, the lean liquid transmission pipeline 4 is provided with the throttle valve 104.
The embodiment of the utility model provides an in, still include: and a rich liquid tank 107, wherein the rich liquid tank 107 is arranged below the rich liquid outlet 106.
In the embodiment of the present invention, the trapping filler 105 is a multi-layer trapping filler; and truss structures are adopted for supporting among the trapping fillers of all layers. The suction device 102 is a suction fan or pump. The pressurized nozzles 108 are uniformly arranged. A carbon dioxide capturing catalyst is added to the capturing packing 105.
Hyperbolic CO2A method of operating a capture column comprising:
inputting the barren solution into a barren solution pool through a barren solution conveying pipeline, and spraying the barren solution through a pressurizing spray head;
a pneumatic air extractor for moving the atmosphere from the bottom of the hyperbolic trapping tower to the top of the tower;
solar energy is absorbed through a solar energy absorption coating on the outer wall of the hyperbolic-type capturing tower, so that the temperature of the hyperbolic-type capturing tower is increased, the temperature of the atmosphere in the hyperbolic-type capturing tower is increased, a temperature difference is generated between the temperature of the atmosphere and the atmosphere outside the capturing tower, and the flow rate of the atmosphere in the capturing tower is increased;
the mass transfer is carried out between the atmosphere and the barren solution and the trapping filler, so that the carbon dioxide trapping is realized;
and the trapped rich liquid is output through a rich liquid outlet.
The embodiment of the utility model provides an in, promote atmospheric velocity of flow through hyperbolic tower, simultaneously according to chimney effect principle, paint solar energy absorption coating at the entrapment tower outer wall, make the air in entrapment tower temperature rising conducts the heat for the tower for the temperature of air risees, produces the difference in temperature with the outer air of tower, makes the air flow rate promotion in the tower equally, and then has improved CO2Mass transfer efficiency with the capture liquid; the capture lean solution is changed into liquid drops through the pressurizing nozzle group, and the specific surface area of the capture solution is increased; the multi-layered packing provides a trapping environment for the process and catalyzes the trapping process. The flow of the capture liquid is controlled by a throttle valve arranged in the barren solution conveying pipeline so as to realize efficient capture, the content of carbon dioxide gas in the pregnant solution is increased as much as possible, and the process efficiency is improved. And the rich liquid is collected by a rich liquid pool at the bottom of the capturing tower and is output to the next stage through a pipeline. The solid catalytic filler is additionally arranged in the capturing tower, so that the capturing efficiency of the carbon dioxide can be enhanced; the fillers are supported by a truss structure, so that the air inflow of the atmosphere is improved; multiple purposeThe trapping efficiency is also improved by the re-trapping mode. The exhaust fan is additionally arranged at the top end of the trapping tower to improve the flow velocity of air, improve the mass transfer efficiency and simultaneously and continuously remove CO at the bottom2The higher content of atmospheric air is sucked in, and CO is absorbed at the top2The lower content atmosphere is vented. The trapping catalyst is added into the trapping filler to improve the trapping efficiency.
Referring to FIG. 3, in the embodiment of the present invention, CO2The desorption apparatus 2 includes: vacuum heat-insulating layer 201, phase-change material heat storage layer 202, rich liquid runner 203 and CO2 A separation membrane 204, a lye flow channel 205, a first housing 206 and a first solar collector 207.
The first shell is arranged on the first solar heat collector and used for protecting and supporting the internal device, and the first solar heat collector collects sunlight and absorbs a large amount of solar energy through the V-shaped solar panel below the first shell so as to radiatively heat the internal area of the first shell; the rich liquid flow passage is heated by external radiation, wherein CO is contained in the rich liquid flow passage2The molecules begin to desorb from the capture solution and are driven by the concentration difference towards the CO2The separation membrane (lye flow channel) moves and is absorbed by lye and finally by CO2The first alkali liquor outlet of the desorption device flows out to enter the rear catalytic conversion device.
A vacuum heat-insulating layer, a phase-change material heat-accumulating layer, a rich liquid flow passage and CO are sequentially arranged in the first shell from outside to inside2A separation membrane and an alkali liquor flow passage; wherein, CO2The separation membrane forms an alkali liquor flow passage and is provided with a first alkali liquor inlet and a first alkali liquor outlet; the rich liquid runner is provided with a rich liquid inlet and a lean liquid outlet.
Referring to FIG. 4, in the embodiment of the present invention, CO2The catalytic conversion device includes: a first feed inlet 801, a negative electrode 802, a proton exchange membrane 803, a second housing 804, a product outlet 805, a balance port 806, a positive electrode 807 and a second solar collector 808; wherein, the balance port 806 is communicated with the outside atmosphere and is used for discharging the gas generated by the anode electrochemical reaction so as to ensure the pressure balance of the container; if desired, material may also be added through equalizing port 806.
Referring to fig. 5, in the embodiment of the present invention, the methanol membrane separation device 9 includes: a second feed inlet 901, a methanol separation membrane 902, a third casing 903, an unvented outlet 904, a vapor outlet 905 and a third solar collector 906.
The third shell is arranged on a third solar heat collector which is used for absorbing solar energy to heat the third shell
A cavity is arranged in the third shell; a methanol separation membrane is arranged in the cavity; the methanol separation membrane divides the cavity into a first cavity and a second cavity; the methanol separation membrane can be a cellulose acetate membrane;
one end of the first chamber is provided with a second feeding hole, and the other end of the first chamber is provided with an unvaryed outlet; the second chamber is provided with a steam outlet; the non-permeable outlet and the steam outlet are arranged at the same end of the cavity;
in the embodiment of the utility model, the cellulose acetate membrane is the cellulose acetate membrane after adding the hydrophobic group modification.
In the embodiment of the utility model, the cavity is cylindric. The pervaporation membrane equally divides the cavity into a first chamber and a second chamber. The thickness range of the cellulose acetate membrane is 0.20-0.40 mu m.
In the embodiment of the utility model, the methanol-water dilute solution is introduced into the first chamber from the feed inlet, and under the heating action of the solar heat collector, part of methanol and water are evaporated to form mixed steam; because of the vapor pressure difference existing on the two sides of the pervaporation membrane, the pressure difference pushes components to enter the membrane from the raw material liquid and then permeate into a second chamber on the rear side of the membrane; the cellulose acetate membrane has a permselective effect, resulting in a majority of the components that can permeate towards the rear side of the membrane as methanol. The utility model discloses a methanol separator can separate the rare methyl alcohol in the aqueous solution to utilize solar energy to supply heat for the device, can reduce the energy consumption, have higher economic nature.
The utility model discloses the theory of operation of device does: containing low concentrations of CO2The gas is introduced from the lower end of the catcher, the inner gas is heated by the outer wall of the cooling tower of the catcher through absorbing solar energy to flow upwards, and CO in the gas2Quilt CO2Absorbing the capture liquid to obtain rich liquid, and pumping and enrichingCO of desorption device connected to liquid transmission pipeline2Rich solution inlet, CO obtained by the desorption process in the desorption device2The molecules move in the polyimide polymer film under the drive of concentration difference and are absorbed by alkali liquor to absorb CO2The subsequent alkali liquor is connected to a first feed inlet of the catalytic conversion device through a valve and a first pipeline; the combined action of solar energy and electric energy is utilized in a catalytic conversion device to complete photoelectric integrated catalytic conversion to generate products, and a lean solution outlet of a desorption device is connected to a lean solution inlet of a catcher through a lean solution transmission pipeline and a pump to realize the recycling of a catching liquid; a product outlet of the catalytic conversion device is connected to a second feed inlet of the methanol membrane separation device through a pump; the non-transparent outlet of the methanol membrane separation device is connected to the first feed inlet of the catalytic conversion device through a pump to complete secondary catalytic conversion, so that the full utilization of raw materials is realized, and the yield of products is improved; the permeation outlet of the methanol membrane separation device is connected with the inlet of a condenser, and the outlet of the condenser is set as the product outlet of the system.
Referring to fig. 6, a method for operating an intermittent carbon dioxide capture and conversion coupling device according to an embodiment of the present invention includes the following steps:
step 1, under the condition of sufficient illumination, opening an air extractor at the top end of an absorption tower type carbon dioxide trap, heating the gas inside the trap by absorbing solar energy through the outer wall of a similar cooling tower of the trap, and enabling the air to flow upwards under the combined action of buoyancy and suction;
step 2, opening a liquid catching and collecting nozzle in the catcher, and absorbing CO in the air by the outwardly sprayed liquid catching and collecting2The gas is changed into rich liquid and is connected to CO of a desorption device through a pump and a rich liquid transmission pipeline2A rich liquor inlet, wherein the flow of the sprayed capture liquid can be adjusted by adjusting a throttle valve of a lean liquor pipeline of the trap;
step 3, CO obtained by the rich solution in the desorption process in the desorption device2Driven by concentration difference, molecules move to CO2The separation membrane (polyimide polymer membrane) moves and is absorbed by alkali liquor to absorb CO2The alkaline liquor is connected to the photoelectric integrated catalytic conversion device through a valve and a first pipelineThe first feed inlet can adjust the flow of the alkali liquor introduced into the catalytic conversion device by adjusting a valve on the first pipeline in the process so as to balance CO in the system2Rate differences in capture and conversion processes;
step 4, the catalytic conversion device completes the photoelectric integrated catalytic conversion process under the combined action of solar energy and electric energy, and a product outlet of the catalytic conversion device is connected to a second raw material inlet of the methanol membrane separation device through a pump;
step 5, connecting the non-transparent outlet of the methanol membrane separation device to a first raw material inlet of the catalytic conversion device through a pump to complete secondary catalytic conversion, thereby realizing full utilization of raw materials and improving the yield of products; the permeation outlet of the methanol membrane separation device is connected with the inlet of the condenser, and the product of the system is obtained from the outlet of the condenser.
The utility model discloses use clear solar energy as the heat source, design into intermittent type formula coupled system purpose is exactly in order to utilize solar energy to the at utmost, and what the system mainly gone on during the no sunlight night is CO2The trapping process, when there is illumination in the daytime, collect the solar energy through CPC solar collector and carry on subsequent desorption, catalytic conversion and methanol membrane separation process, all parts of the whole system coordinate each other, realize CO jointly2And the full utilization of solar energy. The utility model discloses the system is applicable to the area that the solar energy is sufficient, can establish near solar energy electric field and the wind farm in the desert with this system to utilize the methyl alcohol of production on the spot, be used for the power energy of car or other machinery so just can further reduce cost, promote industrialization level. In addition, the system can be designed into different models to meet the requirements of different factories, and the carbon emission of a heavy industrial area is greatly reduced if the system can be widely used. The device of the utility model is simple to manufacture and can be used for low concentration (350-3) The method has the advantages of wide use condition, wide application range and low site selection requirement, is favorable for reducing carbon emission, reaches the national standard, and relieves the environmental problem caused by carbon dioxide emission. Compared with the existing CCS technology, the system can realize the conversion after carbon dioxide enrichmentThe chemical recycling not only effectively avoids the risk of carbon dioxide stored in geology, but also converts the carbon dioxide into methanol with great industrial utilization value, thereby relieving the problem of energy shortage in partial areas to a certain extent. Therefore, the system has strong feasibility under the modern industrial technical background, can generate good environmental protection effect, and has great practical significance and market potential. The method of the utility model uses CO2The trapping device is connected with the catalytic conversion device through the desorption device, and the trapping device absorbs CO through the absorption liquid2Gas, subsequently enriched in CO2The absorption liquid is introduced into a desorption device to complete the desorption process, and CO obtained by desorption2Entering a catalytic conversion device to finish the catalytic conversion process to generate the methanol. In the system, the trapping, desorption and catalytic conversion are connected into a set of continuous flow, and the CO obtained by trapping is collected2The gas completes the catalytic conversion process in the subsequent device in the system, thereby realizing CO2The coupling of the capture and conversion processes can reduce CO2The storage and transportation cost of (2), the energy consumption is reduced, and the CO is improved2The conversion efficiency.
The above embodiments are only used to illustrate the technical solution of the present invention and not to limit the same, although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify or equally replace the specific embodiments of the present invention, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the protection scope of the claims of the present invention.

Claims (9)

1. An apparatus for coupling batch carbon dioxide capture and conversion, comprising: CO22Trap (1), CO2Desorption apparatus (2), CO2A catalytic conversion device (8) and a methanol membrane separation device (9);
the CO is2The catcher (1) is provided with a rich liquid outlet (106) and a lean liquid inlet;
the CO is2The desorption device (2) is provided with a rich liquid inlet, an alkali liquid inlet and an alkali liquid outlet; wherein, theCO2The desorption device (2) is provided with CO2A separation membrane (204) for separating CO from the rich liquid2；
The CO is2The catalytic conversion device (8) is provided with a first feed port (801), a negative electrode (802), a proton exchange membrane (803), a positive electrode (807), a balance port (806) and a product outlet (805); wherein the proton exchange membrane (803) is used to transfer hydrogen ions between the cathode and the anode;
the methanol membrane separation device (9) is provided with a second feed inlet (901), a methanol separation membrane (902), an impermeable outlet (904) and a steam outlet (905); wherein, the methanol separation membrane is used for separating methanol aqueous solution;
wherein said CO is2A rich liquid outlet (106) of the trap (1) is communicated with the CO through a rich liquid transmission pipeline (3)2The rich liquid inlet of the desorption device (2) is communicated; the CO is2An alkali liquor outlet of the desorption device (2) is communicated with the CO through a first pipeline (11)2The first feed inlet (801) of the catalytic conversion device (8) is communicated; the CO is2The product outlet (805) of the catalytic conversion device (8) is communicated with the second feed inlet (901) of the methanol membrane separation device (9) through a product conveying pipeline.
2. A batch carbon dioxide capture and conversion coupled plant according to claim 1, characterized in that the non-permeate outlet (904) of the methanol membrane separation device (9) is connected to the CO via a second line2The first feed inlet (801) of the catalytic conversion device (8) is communicated;
the CO is2The desorption device (2) is provided with a barren solution outlet which is communicated with CO through a barren solution transmission pipeline (4)2The barren liquor inlet of the catcher (1) is communicated;
the first pipeline (11) is provided with a valve (6) for controlling the introduction of CO2The flow of the alkaline solution of the catalytic conversion device (8) is balanced to balance CO2The rate difference between the two processes of capture and catalytic conversion.
3. A batch-wise carbon dioxide capture and conversion coupled device according to claim 1, further comprising: a condenser (10);
a steam outlet (905) of the methanol membrane separation device (9) is communicated with an inlet of the condenser (10);
the condenser (10) is provided with a methanol outlet for outputting methanol.
4. A batch-wise carbon dioxide capture and conversion coupled plant according to claim 1, wherein the CO is2The trap (1) comprises: hyperbolic CO2The device comprises a capturing tower (101), an air extraction device (102), a lean solution pool (103), a capturing filler (105), a rich solution outlet (106) and a pressurizing spray head (108);
hyperbolic CO2The outer wall of the capturing tower (101) is provided with a solar energy absorption coating for absorbing gas in the solar energy heating tower;
hyperbolic CO2The top of the trapping tower (101) is provided with an air extraction device (102), and the bottom is provided with a rich liquid outlet (106);
a lean liquid pool (103) and a trapping filler (105) are arranged between the air extraction device (102) and the rich liquid outlet (106) from top to bottom in sequence;
the barren liquor pool (103) is provided with a plurality of outlets, and the outlets are provided with pressurizing nozzles (108); an inlet of the lean liquid pool (103) is provided with a lean liquid transmission pipeline (4) used for being communicated with the outside.
5. A batch-wise carbon dioxide capture and conversion coupled plant according to claim 4, characterized in that the lean liquid transfer line (4) is provided with a throttle valve (104); the trapping filler (105) is a plurality of layers of trapping filler, and the trapping filler (105) in each layer is supported by adopting a truss structure.
6. A batch-wise carbon dioxide capture and conversion coupled plant according to claim 1, wherein the CO is2The desorption device (2) comprises: a vacuum heat-insulating layer (201), a phase-change material heat storage layer (202), a rich liquid flow channel (203), CO2The device comprises a separation membrane (204), a lye flow channel (205), a first shell (206) and a first solar heat collector (207);
the first shell (206) is arranged on the first solar heat collector (207) and used for carrying out radiation heating on the inner area of the first shell through the first solar heat collector;
a vacuum heat-insulating layer (201) and a phase-change material heat storage layer (202) are sequentially arranged in the first shell (206) from outside to inside;
CO is arranged in the phase-change material heat storage layer (202)2A separation membrane (204); wherein said CO is2The separation membrane (204) divides the area in the phase change material heat storage layer (202) into a rich liquid flow channel (203) and an alkali liquor flow channel (205); the alkali liquor flow passage (205) is provided with an alkali liquor inlet and an alkali liquor outlet, and the rich liquor flow passage (203) is provided with a rich liquor inlet and a lean liquor outlet.
7. A batch-wise carbon dioxide capture and conversion coupled plant according to claim 1, wherein the CO is2The catalytic conversion device (8) includes: a first feed inlet (801), a negative electrode (802), a proton exchange membrane (803), a second housing (804), a product outlet (805), a balance port (806), a positive electrode (807) and a second solar collector (808);
wherein the second housing (804) is arranged on the second solar collector (808); a proton exchange membrane (803) is arranged in the second shell (804); the proton exchange membrane (803) divides an area within the second shell into a third chamber and a fourth chamber; one end of the third chamber is provided with a first feeding hole (801) and a negative electrode (802), and the other end of the third chamber is provided with a product outlet (805); one end of the fourth chamber is provided with a balancing port (806) and a positive electrode (807).
8. A batch-wise carbon dioxide capture and conversion coupled plant according to claim 1, characterized in that the methanol membrane separation device (9) comprises: a second feed inlet (901), a methanol separation membrane (902), a third shell (903), an unvolation outlet (904), a steam outlet (905) and a third solar heat collector (906);
the third shell (903) is arranged on a third solar heat collector (906), and the third solar heat collector is used for absorbing solar energy to heat the third shell; a cavity is arranged in the third shell (903), and a methanol separation membrane (902) is arranged in the cavity; wherein the methanol separation membrane (902) divides the cavity into a first chamber and a second chamber; one end of the first chamber is provided with a second feeding hole (901), the other end of the first chamber is provided with an unvented port (904), and the second chamber is provided with a steam outlet (905); the non-permeate outlet (904) and the vapour outlet (905) are provided at the same end of the cavity.
9. A batch-wise carbon dioxide capture and conversion coupled device according to claim 1,
the CO is2The separation membrane (204) is a polyimide polymer membrane;
the methanol separation membrane (902) is a cellulose acetate membrane.
CN202020856699.2U 2020-05-20 2020-05-20 Intermittent carbon dioxide capture and conversion coupling device Active CN212505091U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111690946A (en) * 2020-05-20 2020-09-22 西安交通大学 Intermittent carbon dioxide capture and conversion coupling device and operation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111690946A (en) * 2020-05-20 2020-09-22 西安交通大学 Intermittent carbon dioxide capture and conversion coupling device and operation method thereof
CN111690946B (en) * 2020-05-20 2023-12-19 西安交通大学 Intermittent carbon dioxide capturing and converting coupling device and operation method thereof

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