CN214914809U - Carbon dioxide capture system utilizing waste gas temperature difference for power generation - Google Patents
Carbon dioxide capture system utilizing waste gas temperature difference for power generation Download PDFInfo
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- CN214914809U CN214914809U CN202120504418.1U CN202120504418U CN214914809U CN 214914809 U CN214914809 U CN 214914809U CN 202120504418 U CN202120504418 U CN 202120504418U CN 214914809 U CN214914809 U CN 214914809U
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- carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
- B01D53/326—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 in electrochemical cells
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/50—Carbon dioxide
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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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
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a carbon dioxide capture system utilizing waste gas temperature difference to generate electricity, which comprises a temperature difference generating device and a carbon dioxide capture device which are connected with each other, wherein the carbon dioxide capture device comprises a plurality of carbon dioxide capture units which are connected in parallel, and the carbon dioxide capture units comprise an electrolytic cell, a piston container and a gas cylinder which are connected in sequence; the high-temperature waste gas is cooled after passing through the temperature difference power generation device and enters the electrolytic cell, a reduction potential is applied to a working electrode of the electrolytic cell to absorb carbon dioxide in the waste gas, and an oxidation potential is applied to release the carbon dioxide to the piston container; carbon dioxide is injected into the gas cylinder from the piston container; the temperature difference power generation device supplies power to the electrolytic cell. The utility model discloses utilize industrial waste gas's waste heat to carry out thermoelectric generation, for entrapment device and control system provide the electric energy, taken into account the cooling demand to the exhaust gas air current of electrochemistry process in the entrapment.
Description
Technical Field
The utility model belongs to the technical field of the carbon dioxide recovery, concretely relates to utilize waste gas thermoelectric generation's carbon dioxide entrapment system.
Background
Global warming is one of the most direct manifestations of aggravation of greenhouse effect, which contributes to the hazards of sea level rise, glacier regression, river early-melting, etc. Carbon dioxide contained in combustion exhaust gas generated when fossil fuel is burned is considered to be the most important cause for exacerbating the greenhouse effect. The reduction of carbon emissions in response to climate change has become an international hot issue.
The capture system of the widely applied traditional technology for recovering carbon dioxide by using a chemical adsorbent (such as monoethanolamine) is generally provided with an absorption tower, a regeneration tower, a washing chamber, a condensate water pipeline, a washing water pipeline and the like, and has the defects of complex pipeline, large container volume and difficult elimination of carbon dioxide loss in the recovery process.
The principle of the electrochemical method for capturing carbon dioxide is to utilize quinone substances as carriers in a proper solvent phase (organic solvent or ionic liquid), and CO is generated when the quinone substances are applied with a reduction potential2Is easy to combine with to form stable [ Q-CO ]2]2－An adduct; adducts [ Q-CO ] already formed2]2－Previously bound CO when an oxidation potential is applied2Can be easily released.
However, electrochemical carbon dioxide recovery techniques typically require the temperature of the gas in the process to be controlled to suit the electrochemical process, which is often much lower than the temperature of the direct exhaust from industrial processes; in addition, the improvement of the combination and release rate of carbon dioxide in the electrochemical process is also one of the keys for promoting the development of the technology for capturing carbon dioxide electrochemically.
SUMMERY OF THE UTILITY MODEL
The utility model provides an to above-mentioned problem and demand, provide an utilize waste gas thermoelectric generation's carbon dioxide entrapment system, to industrial production waste gas, utilize thermoelectric generation to compromise waste gas cooling for the entrapment device energy supply, realize simultaneously in the space of compactness lossless ground with the automatic entrapment of carbon dioxide for the gas product that can directly utilize. In addition, the capture system is effective to increase the rate of carbon dioxide release from the electrolytic cell during the electrochemical process.
In order to achieve the purpose, the utility model provides a carbon dioxide capture system utilizing waste gas temperature difference for power generation, which comprises a temperature difference power generation device and a carbon dioxide capture device which are connected, wherein the carbon dioxide capture device comprises a plurality of carbon dioxide capture units which are connected in parallel, and the carbon dioxide capture units comprise an electrolytic cell, a piston container and a gas cylinder which are connected in sequence;
the high-temperature waste gas is cooled after passing through the temperature difference power generation device and enters the electrolytic cell, a reduction potential is applied to a working electrode of the electrolytic cell to absorb carbon dioxide in the waste gas, and an oxidation potential is applied to release the carbon dioxide to the piston container; carbon dioxide is injected into the gas cylinder from the piston container;
the temperature difference power generation device supplies power to the electrolytic cell.
Preferably, the electrolytic cell comprises an auxiliary electrode and an electrolyte for providing and collecting electrons for the electrochemical reaction of the trapping process.
Preferably, the piston reservoir comprises an electrically controlled piston mechanism driven by an electric motor, and a pressure sensor for monitoring the pressure in the piston reservoir.
Preferably, an electromagnetic three-way valve is arranged among the electrolytic cell, the piston container and the gas cylinder.
Preferably, the electrolytic cell comprises a gas flow channel inlet pipe and a gas flow channel outlet pipe for inlet and outlet of the off-gas.
Preferably, the gas flow channel inlet pipe is provided with an inlet pipe electromagnetic valve, and the gas flow channel outlet pipe is provided with an outlet pipe electromagnetic valve.
Preferably, the gas cylinder comprises a cylinder port solenoid valve.
The technical effects of the utility model:
the utility model discloses utilize industrial waste gas's waste heat to carry out thermoelectric generation, for entrapment device and control system provide the electric energy, taken into account the cooling demand to the exhaust gas air current of electrochemistry process in the entrapment. And meanwhile, the compact system can realize lossless capture of carbon dioxide released in the electrochemical process. In addition, the capture system maintains the negative pressure of the collection environment all the time through automatic control, effectively increases the release rate of carbon dioxide from the electrolytic cell in the electrochemical process, and improves the overall capture rate.
Drawings
Fig. 1 is a schematic view of a carbon dioxide capture system provided by the present invention.
Fig. 2 is the schematic diagram of the thermoelectric power generation device provided by the utility model.
Fig. 3 is a schematic structural diagram of the carbon dioxide capturing unit provided by the present invention.
Fig. 4 is a flow chart of the carbon dioxide collecting system provided by the present invention.
Fig. 5 is a schematic view of each working stage of the carbon dioxide capturing unit provided by the present invention.
In the figure, 10-thermoelectric power generation device, 11A-waste gas flow channel inlet pipe, 11B-waste gas flow channel outlet pipe, 12-waste gas flow chamber, 13-thermoelectric power generation sheet, 14-heat dissipation sheet, 15-cooling water tank, 16A-anode lead, 16B-cathode lead, 17-energy storage power supply device, 20-carbon dioxide capture device, 21A-gas flow channel inlet pipe, 21B-gas flow channel outlet pipe, 22A-gas flow channel inlet pipe electromagnetic valve, 22B-gas flow channel outlet pipe electromagnetic valve, 23A-working electrode, 23B-electrolyte, 23C-auxiliary electrode, 24-piston container, 25-electric control piston mechanism, 26-piston container pressure sensor, 27-electromagnetic three-way valve, 28-gas cylinder port electromagnetic valve, 29-gas cylinder.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The principle of the electrochemical method for capturing carbon dioxide is to utilize quinone substances as carriers in a proper solvent phase (organic solvent or ionic liquid), and CO is generated when the quinone substances are applied with a reduction potential2Is easy to combine with to form stable [ Q-CO ]2]2－An adduct; adducts [ Q-CO ] already formed2]2－Previously bound CO when an oxidation potential is applied2Can be easily released.
The forward process of the reversible reaction is: CO22First dissolved in electrolyte, the quinone substances applied with reduction potential get electrons to form quinone anion (Q)·－) And quinone dianion (Q)2－) Followed by quinone dianion (Q)2－) Combined with CO2 dissolved in electrolyte to form adduct [ Q-CO ]2]2－。
The following chemical reaction formula:
as shown in fig. 1 and 2, the present invention provides a carbon dioxide capturing system including a thermoelectric power generation device 10 and a carbon dioxide capturing device 20 connected to each other. The high-temperature waste gas passes through the waste gas flow passage inlet pipe 11A, passes through the waste gas flowing chamber 12, is cooled under the action of the thermoelectric generation sheet 13, the heat dissipation ratchet sheet 14 and the cooling water tank 15, and flows out through the waste gas flow passage outlet pipe 11B after the temperature is reduced to the requirement of the carbon dioxide capture device 20, so as to be used by the carbon dioxide capture device 20. Meanwhile, the thermoelectric generation piece 13 generates electricity by utilizing the temperature difference between the two sides of the thermoelectric generation piece, and transmits the electric energy to the energy storage power supply device 17 by connecting the thermoelectric generation piece with the anode lead 16A and the cathode lead 16B of the energy storage device to be stored so as to be used by the carbon dioxide capture device 20. The flow channel of the waste gas flowing chamber 12 is S-shaped, two sides of the thermoelectric generation piece 13 are tightly connected with the waste gas flowing chamber 12 and the heat dissipation ratchet piece 14, and the heat dissipation ratchet piece 14 is inserted into the cooling water tank 15, so that the purposes of cooling and power generation are easily achieved.
As shown in fig. 1 and 3, the carbon dioxide capturing apparatus 20 includes a plurality of carbon dioxide capturing units connected in parallel, which include an electrolytic cell, a piston container 24, and a gas cylinder 29 connected in series. The cooled waste gas enters the electrolytic cell through the gas flow passage inlet pipe 21A, the electrolytic cell comprises a working electrode 23A, an electrolyte 23B and an auxiliary electrode 23C, the auxiliary electrode 23C provides electrons for chemical reaction in the trapping process and collects the electrons, and the electrolyte comprises quinone substances. A reduction potential is applied to the working electrode 23A of the electrolytic cell to absorb carbon dioxide in the waste gas, and an oxidation potential is applied to release the carbon dioxide to the piston container 24; carbon dioxide is injected from the piston vessel 24 into the cylinder 29.
The piston reservoir 24 includes an electronically controlled piston mechanism 25 and a piston reservoir pressure sensor 26, and the piston reservoir 24 is capable of collecting carbon dioxide released from the cell and increasing the cell reaction rate each time the cell releases carbon dioxide and injects carbon dioxide into the cylinder 29. When the electrolytic cell releases carbon dioxide, the pressure sensor 26 monitors the internal air pressure of the piston container 24 in real time and controls the rising rate of the electronic control piston mechanism 26, so that the internal air pressure of the piston container 24 is always lower than the environmental pressure of the electrolytic cell by a certain level, the mass transfer rate of the carbon dioxide release is accelerated, and the overall rate of the electrolytic cell reaction is improved. The cylinder port solenoid valve 28 and cylinder 29 are activated when the electrolytic cell absorbs carbon dioxide from the exhaust gas or when the electrolytic cell is shut down, and serve to eventually collect the carbon dioxide trapped in the piston container 24 to form an industrial product. The carbon dioxide capturing device 20 in which a plurality of carbon dioxide capturing units are connected in parallel can perform time difference control on each unit, so that each unit is started in two groups of crossed sequences, each capturing unit is not idle, and simultaneously, the waste gas is fully utilized to capture carbon dioxide.
As shown in fig. 4 and 5, the work flow of the carbon dioxide capture system provided by the present invention includes:
stage 0 (exhaust gas cooling and thermoelectric generation stage): the high-temperature waste gas enters the pipe 11A and the waste gas flowing chamber 12 through the waste gas flow channel, is cooled under the combined action of the thermoelectric generation sheet 13, the heat dissipation ratchet sheet 14 and the cooling water tank 15, and enters the carbon dioxide capture device 20 through the waste gas flow channel outlet pipe 11B. Meanwhile, the thermoelectric generation piece 13 generates electricity by utilizing the temperature difference between the two sides of the thermoelectric generation piece, and the electric energy is transmitted to the energy storage power supply device 17 by the positive electrode lead 16A and the negative electrode lead 16B which are connected with the thermoelectric generation piece and the energy storage device to be stored so as to be used by each carbon dioxide capture unit in the carbon dioxide capture device 20.
Stage 1 (carbon dioxide binding stage): the gas flow channel inlet solenoid valve 22A is opened and the exhaust gas enters the electrolytic cell through the gas flow channel inlet 21A. The reduction potential is applied to the cell working electrode 23A, and carbon dioxide in the exhaust gas is absorbed. The gas flow path outlet pipe solenoid valve 22B is opened, and other exhaust gas is discharged through the gas flow path outlet pipe 21B.
Stage 2 (carbon dioxide release stage): the gas flow path inlet solenoid valve 22A and the gas flow path outlet solenoid valve 22B are closed, and the solenoid three-way valve 27 communicates only the piston container 24 and the electrolytic cell. The electrolytic cell working electrode 23A is applied with an oxidation potential, the electrically controlled piston mechanism 25 moves vertically upwards, and the released carbon dioxide enters the piston container 24. The pressure sensor 26 monitors the internal air pressure of the piston container 24 in real time and controls the rising rate of the electronic control piston mechanism 25, so that the internal air pressure of the piston container 24 is always lower than the environmental pressure of the electrolytic cell by a certain level, the mass transfer rate of carbon dioxide release is accelerated, and the overall rate of the electrolytic cell reaction is improved.
Stage 3 (carbon dioxide capture stage): the electromagnetic three-way valve 27 is only communicated with the piston container 24 and the gas cylinder 29, the gas cylinder port electromagnetic valve 28 is opened, the electronic control piston mechanism 25 moves vertically downwards, and the collected carbon dioxide is injected into the gas cylinder 29. Stage 1 can be performed simultaneously therewith.
The cooling of the waste gas and the energy supply of the thermoelectric generation and the circulating work of each carbon dioxide capturing unit in the cross sequence of the stages 1, 2 and 3 form the operation of the automatic carbon dioxide capturing system of the waste gas thermoelectric generation.
To sum up, the utility model provides an utilize carbon dioxide entrapment system of waste gas thermoelectric generation, for the entrapment system of traditional chemical absorption agent (for example: monoethanolamine) recovery carbon dioxide, this system device is compact, and the pipeline is short briefly, has very big restriction to the entrapment process loss of the carbon dioxide of release, has accomplished harmless entrapment basically, and this entrapment system can accomplish the compression bottling of clean carbon dioxide under the compact device condition, forms the industrial product that can directly utilize, for example transports the carbon dioxide of bottling to agricultural greenhouse and uses etc..
While the present invention has been described in detail with reference to the preferred embodiments thereof, it should be understood that the above description should not be taken as limiting the present invention. Numerous modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (7)
1. A carbon dioxide capture system utilizing waste gas temperature difference for power generation is characterized by comprising a temperature difference power generation device and a carbon dioxide capture device which are connected, wherein the carbon dioxide capture device comprises a plurality of carbon dioxide capture units which are connected in parallel, and each carbon dioxide capture unit comprises an electrolytic cell, a piston container and a gas cylinder which are sequentially connected;
the temperature difference power generation device supplies power to the electrolytic cell.
2. The carbon dioxide capture system of claim 1, wherein the electrolysis cell comprises an auxiliary electrode and an electrolyte that provide and collect electrons for the electrochemical reaction of the capture process.
3. The carbon dioxide capture system of claim 1, wherein the piston container comprises an electronically controlled piston mechanism driven by a motor, and a pressure sensor for monitoring pressure within the piston container.
4. The carbon dioxide capture system of claim 1, wherein a three-way solenoid valve is provided between the electrolytic cell, the piston vessel, and the gas cylinder.
5. The carbon dioxide capture system of claim 1, wherein the electrolysis cell comprises a gas flow path inlet pipe and a gas flow path outlet pipe for inlet and outlet of the off-gas.
6. The carbon dioxide capture system of claim 5, wherein the gas flow inlet conduit is provided with an inlet conduit solenoid valve and the gas flow outlet conduit is provided with an outlet conduit solenoid valve.
7. The carbon dioxide capture system of claim 1, wherein the gas cylinder comprises a cylinder port solenoid valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2021203922425 | 2021-02-22 | ||
| CN202120392242 | 2021-02-22 |
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| CN202120504418.1U Active CN214914809U (en) | 2021-02-22 | 2021-03-10 | Carbon dioxide capture system utilizing waste gas temperature difference for power generation |
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| CN114576550B (en) * | 2022-03-16 | 2023-06-02 | 江西茂盛环境有限公司 | Carbon dioxide comprehensive utilization, trapping and recycling system |
| CN114797813A (en) * | 2022-05-26 | 2022-07-29 | 上海海事大学 | Preparation method and product of anthraquinone/multi-walled carbon nanotube composite material capable of trapping carbon dioxide |
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