CN120393897B - A photocatalytic carbon dioxide reduction reaction device - Google Patents
A photocatalytic carbon dioxide reduction reaction deviceInfo
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- CN120393897B CN120393897B CN202510922572.3A CN202510922572A CN120393897B CN 120393897 B CN120393897 B CN 120393897B CN 202510922572 A CN202510922572 A CN 202510922572A CN 120393897 B CN120393897 B CN 120393897B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0093—Microreactors, e.g. miniaturised or microfabricated reactors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
- B01F25/103—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components with additional mixing means other than vortex mixers, e.g. the vortex chamber being positioned in another mixing chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3121—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention provides a photocatalytic carbon dioxide reduction reaction device, which relates to the technical field of photocatalytic reaction equipment and comprises a reactor body and a microreactor, wherein the microreactor is formed by splicing and combining a plurality of vertically laminated and staggered catalytic wallboards, an air inlet and an air outlet, a gas distribution board and a catalytic reaction frame, the catalytic reaction frame comprises an optical fiber lamp tube strip and a vortex generator, the vortex generator comprises a venturi tube and a vortex blunt body, the vortex blunt body is used for blocking gas passing through the venturi tube so as to generate a karman vortex street phenomenon, the contact area of the gas and the catalytic wallboards is improved through air holes formed in the catalytic wallboards, in addition, the venturi tube and the vortex blunt body are arranged in a reaction channel, the vortex blunt body is used for blocking the gas passing through the venturi tube so as to generate the karman vortex street phenomenon, the gas forms vortex in the reaction channel, the boundary layer of the reaction gas is broken, and the efficiency of photocatalytic reaction is improved.
Description
Technical Field
The invention relates to the technical field of photocatalytic reaction equipment, in particular to a photocatalytic carbon dioxide reduction reaction device.
Background
The massive consumption of fossil energy presents two serious problems to humans, namely energy crisis and environmental problems. This has become a common challenge for the development of countries around the world. It is widely believed that excessive emissions of CO 2 are a major cause of a series of extreme environmental change problems such as global warming, land desertification, ocean acidification, etc. Therefore, the emission reduction of CO 2 has become a problem to be solved in various countries around the world.
The CO 2 reduction technology can reduce CO 2 into CH 3OH、CH3CH2 OH and other fuels, so that the concentration of CO 2 in the atmosphere can be reduced, and the conversion and storage of energy can be realized. In the reaction process of the photocatalytic reduction of CO 2, the reactor is used as a core device, and the performance of the reactor directly determines whether the reaction can be efficiently and stably carried out. However, the existing photocatalytic reduction CO 2 reactor has many challenges in terms of light energy utilization rate, contact area of reactants and catalyst, mass transfer efficiency, separation and recovery of catalyst, and the like, and seriously affects further development and industrial application of the photocatalytic reduction CO2 technology.
A regular net-shaped porous carbide carrier suitable for a catalyst and a preparation method thereof, and a regular photocatalyst obtained by loading a photocatalyst by the carrier and a preparation method thereof, wherein the publication number of the carrier is CN1836777A in the prior art. The carbide carrier of the catalyst is a reticular porous carbide carrier, can be directly prepared on a support, is firmly bonded, has high mechanical strength and adsorption performance, and fundamentally avoids the problems of carrier falling off from the support and the like. The secondary loading of the carrier is carried out by adopting a coating mode, so that the thickness of the carbon layer of the carrier is easy to control, and the surface area and pore structure of the carbide carrier can be regulated and controlled within a very wide range by carbonization and activation, thereby being convenient for manufacturing the carrier suitable for different catalysts and adapting to different practical conditions. The carbide carrier supported regular photocatalyst is a photocatalyst integrating adsorptivity and reactivity, has the characteristics of high luminous flux and low pressure drop, and can be conveniently used for gas phase or liquid phase pollution treatment.
However, the device has obvious defects in the use process that the air holes are dense, the resistance of gas circulation is increased, the reaction efficiency is affected, in addition, a reactor with larger aperture is also arranged in the prior art, but the smooth flow of air flow can lead the reaction gas to form a boundary layer, the boundary layer of the reaction gas refers to a thin layer area with obvious speed gradient and concentration gradient, which is formed near the solid surface due to the blocking effect of the viscosity of fluid and the solid surface when the reaction gas contacts the solid catalyst surface or other solid boundaries such as the reactor wall in the reactor, and the existence of the boundary layer of the gas can increase the mass transfer resistance, thereby limiting the reaction rate.
Disclosure of Invention
The present invention is directed to a photocatalytic carbon dioxide reduction reaction device, which solves the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a photocatalytic carbon dioxide reduction reaction device, comprising:
The reactor body consists of a base, a shell and a top cover, and the base, the shell and the top cover are enclosed to form a reactor inner cavity;
The micro-reactor is formed by splicing and combining a plurality of vertically laminated and staggered catalytic wallboards, and a plurality of rectangular array-arranged reaction channels from bottom to top are formed, wherein the catalytic wallboards are coated with photocatalysts;
The gas inlet and outlet comprises a reaction gas inlet and a reaction product outlet, the reaction gas inlet is arranged below the shell, the reaction product outlet is arranged above the shell, and the reaction gas inlet and the reaction product outlet are both communicated with the interior of the inner cavity of the reactor;
The micro-reactor is fixedly arranged above the gas distribution plate, the reaction gas inlet is arranged below the gas diffusion holes, and the reaction gas enters the inner cavity of the reactor through the reaction gas inlet and passes through the gas diffusion holes formed in the gas distribution plate to form a small air flow and finally enters the reaction channel formed by the micro-reactor;
The catalytic reaction frame is rectangular array type fixed mounting on the gas distribution plate, the catalytic reaction frame is inserted in the reaction channel of the microreactor in one-to-one correspondence, the catalytic reaction frame comprises optical fiber lamp tube strips and vortex generators, the vortex generators are provided with at least two groups, the vortex generators are fixedly connected with the optical fiber lamp tube strips, the vortex generators are supported by the optical fiber lamp tube strips so as to be distributed at different heights in the reaction channel, the vortex generators comprise venturi tubes and vortex blunt bodies, the vortex blunt bodies are fixedly mounted at the gas outlet ends of the venturi tubes, and the vortex blunt bodies are used for blocking gas passing through the venturi tubes so as to enable the gas to generate karman vortex street phenomena, so that boundary layers of reaction gases are broken, and the efficiency of photocatalytic reaction is improved.
Preferably, the catalytic wallboard is provided with air holes and splicing grooves, the air holes are one or a combination of a plurality of triangle, quadrangle, pentagon, hexagon and circle, and three-dimensional connecting channels for gas flow are formed inside the microreactor through the air holes.
Preferably, the reaction gas inlet is used for introducing carbon dioxide and water vapor required by the reaction, and the reaction product outlet is used for discharging products generated by the reaction.
Preferably, a sampling port is further formed in the reactor body above the shell, and a gas sampling system is connected to the sampling port.
Preferably, the gas sampling system comprises an external sampling tube, a gas box, a hollow pump, an exhaust tube and a magnetic control valve, wherein the hollow pump is communicated with the gas box through a pipeline, the magnetic control valves are respectively arranged on the tube bodies at two ends of the gas box, and the tube bodies at two ends of the gas box are respectively communicated with the external sampling tube and the exhaust tube through the magnetic control valves.
Preferably, the shell is also provided with a mounting groove for inserting a catalytic wallboard of the microreactor.
Preferably, the vortex generator is provided with two, venturi is middle pipe diameter minimum, and the hollow body structure of both sides pipe diameter continuous increase, the gasbag groove has still been seted up to venturi's minimum pipe diameter department, the gasbag inslot outside is provided with the pipe diameter and adjusts the inflation degree of film through the pump suction operation to gasbag inslot adjustment pipe diameter, and then adjusts venturi's pipe diameter size.
Preferably, the air bag groove arranged on the venturi tube is communicated with the air pumping pipe arranged outside the shell through the venturi tube and the air passage arranged on the optical fiber tube strip, the air pumping pipe is provided with a pair, and the same air pumping pipe is used for synchronously adjusting the pipe diameters of a plurality of venturi tubes arranged at the same height.
Preferably, the air pumping pipes are provided with regulating electromagnetic valves, and are communicated with the two-way air pump through the three-way pipe, and the pipe diameter of the venturi pipe with the same height is correspondingly regulated through the two-way air pump.
Compared with the prior art, the invention has the beneficial effects that:
The invention adopts a layered and spliced micro-reactor structure, the contact area of gas and the catalytic wallboard is increased through the air holes formed in the catalytic wallboard, in addition, a venturi tube and a turbulent flow blunt body are arranged in the reaction channel, and the turbulent flow blunt body is used for blocking the gas passing through the venturi tube so as to generate a karman vortex street phenomenon, thereby enabling the gas to form vortex in the reaction channel, breaking the boundary layer of the reaction gas and improving the efficiency of the photocatalytic reaction.
Drawings
FIG. 1 is an exploded view of the overall structure of the present invention;
FIG. 2 is a schematic sectional view of a catalytic reaction frame of the present invention in partial enlarged form;
FIG. 3 is a schematic view of a catalytic reaction rack connection structure according to the present invention;
FIG. 4 is a schematic view of a horizontal cross-section of the housing of the present invention;
FIG. 5 is a schematic view showing the overall structure of the microreactor of the present invention;
FIG. 6 is a schematic diagram of the overall structure of the present invention;
FIG. 7 is a schematic view of a catalytic wall plate according to the present invention;
FIG. 8 is a schematic view of the mounting positions of the reactant gas inlet and the reactant product outlet of the present invention.
In the figure, a reactor body, a base, a shell, a top cover, a micro-reactor 5, a catalytic wallboard 6, a reaction channel 7, a reaction gas inlet 8, a reaction product outlet 9, a gas distribution plate 10, a gas diffusion hole 11, a catalytic reaction frame 12, a fiber lamp strip 13, a vortex generator 14, a venturi tube 15, a vortex blunt body 16, a gas hole 17, a splicing groove 18, a sampling port 19, an external sampling tube 20, a gas box 21, a hollow pump 22, a gas exhaust pipe 23, a magnetic control valve 24, a mounting groove 25, a gas bag groove 26, a pipe diameter adjusting film 27, a pump suction valve 28, a regulating electromagnetic valve 29 and a three-way pipe 30 are shown in the figure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, the present invention provides a technical solution:
embodiment one:
a photocatalytic carbon dioxide reduction reaction device, comprising:
The reactor comprises a reactor body 1, wherein the reactor body 1 consists of a base 2, a shell 3 and a top cover 4, and the base 2, the shell 3 and the top cover 4 are enclosed to form a reactor inner cavity;
The micro-reactor 5 is formed by splicing and combining a plurality of vertically laminated and staggered catalytic wallboards 6, a plurality of rectangular array-arranged reaction channels 7 are formed from bottom to top, and the catalytic wallboards 6 are coated with photocatalysts;
The gas inlet and outlet comprises a reaction gas inlet 8 and a reaction product outlet 9, the reaction gas inlet 8 is arranged below the shell 3, the reaction product outlet 9 is arranged above the shell 3, and the reaction gas inlet 8 and the reaction product outlet 9 are both communicated with the interior of the inner cavity of the reactor;
The gas distribution plate 10 is fixedly arranged on an assembly groove formed in the shell 3, gas diffusion holes 11 which are in one-to-one correspondence with the reaction channels 7 and distributed in a rectangular array are formed in the gas distribution plate 10, the microreactor 5 is fixedly arranged above the gas distribution plate 10, the reaction gas inlet 8 is arranged below the gas diffusion holes 11, and the reaction gas enters the inner cavity of the reactor through the reaction gas inlet 8, passes through the gas diffusion holes 11 formed in the gas distribution plate 10 to form a small air flow, and finally enters the reaction channels 7 formed by the microreactor 5;
The catalytic reaction frame 12, catalytic reaction frame 12 is rectangular array type fixed mounting on gas distribution board 10, catalytic reaction frame 12 one-to-one inserts in the reaction channel 7 of microreactor 5, catalytic reaction frame 12 includes fiber lamp strip 13 and vortex generator 14, vortex generator 14 is provided with not less than two sets of, vortex generator 14 and fiber lamp strip 13 fixed connection, thereby support vortex generator 14 through fiber lamp strip 13 and make its different altitudes that distribute in reaction channel 7, vortex generator 14 includes venturi 15 and vortex blunt body 16, vortex blunt body 16 fixed mounting is at venturi 15's gas outlet end, thereby stop the gas that passes venturi 15 through vortex blunt body 16 and make it produce karman vortex street phenomenon, and then break the boundary layer of reaction gas, improve the efficiency of photocatalysis reaction.
In the embodiment, the reactor body 1 is used as a main structure of the reaction, and is composed of a top cover 4, a shell 3 and a base 2 which are arranged up, down, the base 2, the shell 3 and the top cover 4 are enclosed to form a reactor cavity, a micro-reactor 5 is arranged in the reactor cavity, the micro-reactor 5 is formed by splicing and combining a plurality of vertically stacked and staggered catalytic wallboards 6, thus forming a three-dimensional airflow channel, the catalytic wallboards 6 are coated with a photocatalyst, the gas is generated by contacting with the photocatalyst, a mounting groove 25 for inserting the catalytic wallboards 6 of the micro-reactor 5 is also arranged in the shell 3, so that the micro-reactor 5 can be stably arranged in the shell 3, the reaction gas in the embodiment is steam and carbon dioxide gas, a reaction gas inlet 8 is used for introducing carbon dioxide and water vapor required by the reaction, the reaction product outlet 9 is used for discharging the products generated by the reaction, the reaction gas inlet 8 and the reaction product outlet 9 are both arranged on the shell 3, the catalytic wall plate 6 is provided with air holes 17 and splicing grooves 18, the air holes 17 are of regular polygonal or circular open pore structures, so that three-dimensional connecting channels for gas flow are formed inside the microreactor 5, the splicing grooves 18 are used for splicing the microreactor 5, the gas flows from bottom to top through a gas distribution plate 10 arranged at the bottom of the microreactor 5, and gas diffusion holes 11 are formed on the gas distribution plate 10, as can be seen by referring to figure 3 of the specification, the gas diffusion holes 11 are positioned right below the reaction channels, the reaction gas enters the inner cavity of the reactor through the reaction gas inlet 8 and passes through the gas diffusion holes 11 formed on the gas distribution plate 10 to form small airflows, and finally enters the reaction channels 7 formed by the microreactor 5, in addition, a catalytic reaction frame 12 is inserted in the reaction channel 7, a group of catalytic reaction frames 12 are respectively arranged in the reaction channels 7, the catalytic reaction frames 12 comprise optical fiber lamp tube strips 13 and vortex generators 14, the optical fiber lamp tube strips 13 are used for connecting an external circuit so as to provide sufficient illumination environment for the reaction, the optical fiber lamp tube strips 13 are fixedly arranged on a tube strip structure for forming, meanwhile, the optical fiber lamp tube strips 13 are also used as supporting mechanisms of the vortex generators 14, the vortex generators 14 comprise venturi tubes 15 and vortex blunt bodies 16, the venturi tubes 15 are hollow tube structures with minimum middle tube diameter and continuously increased tube diameters at two sides, the flow rate of gas is increased due to the reduction of the tube diameters after passing through the venturi tubes, and the vortex blunt bodies 16 are matched at the outlet ends of the venturi tubes 15, so that when fluid bypasses the blunt bodies, the alternately arranged vortex rows formed at the downstream of the object are classical phenomena in fluid dynamics, the vortex rows formed by the vortex rows, the vortex rows can be formed by the aid of the vortex rows, the airflow passing through the venturi tubes 15, the vortex bodies form boundary layers, the vortex rows, the gas flows can flow through the vortex bodies and the vortex bodies are broken, the catalytic reaction channels are fully contacted with the surfaces of the catalytic reaction elements, the catalytic reaction elements are not required to be fully contacted with the surfaces of the catalytic reaction elements, and the catalytic reaction elements are arranged, and the catalytic reaction elements are not required to be fully arranged, and the catalytic reaction rates are improved, and the catalytic reaction element-side-flow-side wall-plate structures are arranged.
Embodiment two:
A sampling port 19 is also arranged on the reactor body 1 above the shell 3, and a gas sampling system is connected at the sampling port 19.
The gas sampling system comprises an external sampling tube 20, a gas box 21, a hollow pump 22, an exhaust tube 23 and a magnetic control valve 24, wherein the hollow pump 22 is communicated with the gas box 21 through a pipeline, the magnetic control valve 24 is respectively arranged on the tube bodies at the two ends of the gas box 21, and the tube bodies at the two ends of the gas box 21 are respectively communicated with the external sampling tube 20 and the exhaust tube 23 through the magnetic control valve 24.
In this embodiment, a sampling port 19 is provided on the surgery 3 and is communicated with the reactor body 1 through the sampling port 19, the structure of the reactor body 1 is fully disclosed, the conduction of the pipes in different paths can be realized through the arrangement of the magnetic control valves 24 on the pipes at the two ends of the gas box 21, and the gas is introduced into the gas box 21 in the negative pressure extraction process of the hollow pump 22, so that the gas is finally discharged from the exhaust pipe 23, and the gas in the gas box 21 can be further recycled into the inner cavity of the reactor through the communication of the gas recycling pipe on the gas box 21, so that the recycling of the gas can be fully performed.
Embodiment III:
The vortex generator 14 is provided with two venturi tubes 15, the venturi tubes 15 are hollow tube structures with minimum middle tube diameter and continuously increased tube diameters at two sides, an air bag groove 26 is further formed in the minimum tube diameter of the venturi tubes 15, a tube diameter adjusting film 27 is arranged on the outer side of the air bag groove 26, and the expansion degree of the tube diameter adjusting film 27 is adjusted by pumping air into the air bag groove 26, so that the tube diameter of the venturi tubes 15 is adjusted.
In this embodiment, further, the air bag groove 26 is formed at the minimum pipe diameter of the venturi tube 15, and the pipe diameter adjusting film 27 is arranged outside the air bag groove 26, so that the pipe diameter can be adjusted in the pumping operation, and the significance of the arrangement is that the air flow passing through the venturi tube 15 can be adjusted, so that the vortex rotation speed of the air formed at the rear end of the blunt body can be adjusted, and the reaction speed can be adjusted.
Embodiment four:
The air bag groove 26 arranged on the venturi tube 15 is communicated with the air pumping pipe 28 arranged outside the shell 3 through the venturi tube 15 and the air passage arranged on the optical fiber tube strip 13, the air pumping pipe 28 is provided with a pair, and the same air pumping pipe 28 is used for synchronously adjusting the pipe diameters of a plurality of venturi tubes 15 arranged at the same height.
The air pumping 28 is provided with a regulating and controlling electromagnetic valve 29, the air pumping 28 is communicated with a two-way air pump through a three-way pipe 30, and the pipe diameter of the venturi 15 with the same height is correspondingly regulated through the two-way air pump.
In this embodiment, a manner of adjusting the tube diameter adjusting film 27 is further disclosed, referring to fig. 2 and 3 of the specification, each venturi tube 15 is supported by four fiber tube strips 13 disposed at corners, two fiber tube strips 13 are hollow, air passages disposed inside the two fiber tube strips are respectively communicated with air bag grooves 26 in venturi tubes 15 with different heights, the air passages in the fiber tube strips 13 are communicated with a bidirectional air pump through an air pumping tube 28, the air pump is not shown in the drawing, the air pump pumps air into a tee 30 through the bidirectional air pump, and corresponding adjusting electromagnetic valves 29 are opened according to requirements, so that air enters the corresponding fiber tube strips 13, and finally enters the air bag grooves 26 of venturi tubes 15 with corresponding heights, thereby synchronously adjusting the inner diameters of venturi tubes 15 with the same height.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A photocatalytic carbon dioxide reduction reaction device, comprising:
The reactor body consists of a base, a shell and a top cover, and the base, the shell and the top cover are enclosed to form a reactor inner cavity;
The micro-reactor is formed by splicing and combining a plurality of vertically laminated and staggered catalytic wallboards, and a plurality of rectangular array-arranged reaction channels from bottom to top are formed, wherein the catalytic wallboards are coated with photocatalysts;
The gas inlet and outlet comprises a reaction gas inlet and a reaction product outlet, the reaction gas inlet is arranged below the shell, the reaction product outlet is arranged above the shell, and the reaction gas inlet and the reaction product outlet are both communicated with the interior of the inner cavity of the reactor;
The micro-reactor is fixedly arranged above the gas distribution plate, the reaction gas inlet is arranged below the gas diffusion holes, and the reaction gas enters the inner cavity of the reactor through the reaction gas inlet and passes through the gas diffusion holes formed in the gas distribution plate to form a small air flow and finally enters the reaction channel formed by the micro-reactor;
The catalytic reaction rack is fixedly arranged on the gas distribution plate in a rectangular array mode, the catalytic reaction rack is inserted into a reaction channel of the micro-reactor in a one-to-one correspondence mode, the catalytic reaction rack comprises optical fiber lamp tube strips and vortex generators, the vortex generators are provided with at least two groups, the vortex generators are fixedly connected with the optical fiber lamp tube strips, the vortex generators are supported through the optical fiber lamp tube strips so that the vortex generators are distributed at different heights in the reaction channel, the vortex generators comprise venturi tubes and vortex blunt bodies, the vortex blunt bodies are fixedly arranged at the gas outlet ends of the venturi tubes, and the vortex blunt bodies block gas passing through the venturi tubes so that karman vortex street phenomena are generated, so that boundary layers of reaction gas are broken, and the efficiency of photocatalytic reaction is improved;
the vortex generator is provided with two venturi tubes, the venturi tubes are of hollow tube structures with the minimum middle tube diameter and the continuously increased tube diameters at the two sides, an air bag groove is further formed in the minimum tube diameter of each venturi tube, a tube diameter adjusting film is arranged on the outer side of each air bag groove, and inflation or air suction operation is carried out in each air bag groove so as to adjust the expansion degree of each tube diameter adjusting film, and then the tube diameter of each venturi tube is adjusted;
The air bag groove formed in the minimum pipe diameter of the venturi tube is communicated with the air pumping pipe formed in the outer portion of the shell through the venturi tube and the air passage formed in the optical fiber tube strip, the air pumping pipe is provided with a pair of air pumping pipes, and the same air pumping pipe is used for synchronously adjusting pipe diameters of a plurality of venturi tubes arranged at the same height.
2. The photocatalytic carbon dioxide reduction reaction device according to claim 1, characterized in that the catalytic wall plate is provided with air holes and splicing grooves, the air holes are one or a combination of a plurality of triangle, quadrangle, pentagon, hexagon and circle, and three-dimensional connecting channels for gas flow are formed inside the microreactor through the air holes.
3. The photocatalytic carbon dioxide reduction reaction device according to claim 1, wherein the reaction gas inlet is used for introducing carbon dioxide and steam required for the reaction, and the reaction product outlet is used for discharging a product produced by the reaction.
4. The photocatalytic carbon dioxide reduction reaction device according to claim 1, characterized in that a sampling port is further provided on the reactor body above the housing, and a gas sampling system is connected to the sampling port.
5. The photocatalytic carbon dioxide reduction reaction device according to claim 4, wherein the gas sampling system comprises an external sampling tube, a gas box, a hollow pump, an exhaust tube and a magnetic control valve, the hollow pump is communicated with the gas box through a pipeline, the magnetic control valves are respectively arranged on the tube bodies at two ends of the gas box, and the tube bodies at two ends of the gas box are respectively communicated with the external sampling tube and the exhaust tube through the magnetic control valves.
6. The photocatalytic carbon dioxide reduction reaction device according to claim 1, characterized in that an installation groove into which a catalytic wall plate of the microreactor is inserted is further provided in the housing.
7. The photocatalytic carbon dioxide reduction reaction device according to claim 6, wherein the pump exhaust pipes are provided with regulating and controlling electromagnetic valves, the pump exhaust pipes are communicated with the two-way air pump through the three-way pipe, and the pipe diameter of the venturi pipe with the same height is correspondingly regulated through the two-way air pump.
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| CN202510922572.3A CN120393897B (en) | 2025-07-04 | 2025-07-04 | A photocatalytic carbon dioxide reduction reaction device |
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| CN217212553U (en) * | 2022-01-26 | 2022-08-16 | 刘斌 | Carbon dioxide sensor for monitoring indoor environment |
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