CN213699399U - Fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device - Google Patents
Fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device Download PDFInfo
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- CN213699399U CN213699399U CN202022605032.8U CN202022605032U CN213699399U CN 213699399 U CN213699399 U CN 213699399U CN 202022605032 U CN202022605032 U CN 202022605032U CN 213699399 U CN213699399 U CN 213699399U
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Abstract
The utility model relates to a greenhouse gas catalytic reforming technical field especially relates to a fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device, including the rotatory coaxial dielectric barrier discharge reactor of external ground electrode, external ground electrode both ends respectively are provided with and drive external ground electrode pivoted 2 # runners, 3 # runners, and the inside upper and lower region of coaxial dielectric barrier discharge reactor respectively has a vibration screen device, and the admission line is provided with and drives the rotatory 1 # runner of admission line. The catalyst solid particles in the fluidized bed reactor keep suspended and moving and are in a fluidized state, the heterogeneous reaction is facilitated, the thermal stability is high, the problems of poor heat transfer and mass transfer, large bed temperature gradient, catalyst sintering, carbon deposition, dust deposition, channel blockage and the like of the packed bed reactor can be effectively solved, and the catalytic reforming efficiency is improved.
Description
Technical Field
The utility model relates to a greenhouse gas catalytic reforming technical field especially relates to a fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Reforming greenhouse gases such as methane and carbon dioxide is one of the hot spots in the research of the energy chemical field. The realization of the synchronous resource utilization of methane and carbon dioxide is important for ensuring the energy safety of fossil fuels and reducing the greenhouse effect caused by climate change.
The plasma is composed of neutral atoms, molecules, radicals, excited states, ions, electrons, and the like. The plasma catalytic reforming combining the plasma and the catalyst can improve the energy conversion efficiency by utilizing the interaction and synergistic effect of the plasma and the catalyst, and has important application value in the aspect of preparing raw material gases of synthesis gas, olefin and other high-value chemicals.
However, the inventors have found that conventional catalytic reforming reactors are mostly packed bed reactors. For the catalytic reforming of the packed bed, along with the progress of the reaction, the reforming reaction with strong heat absorption can cause the problems of poor heat and mass transfer effect, large temperature gradient of the bed layer, catalyst sintering, carbon deposition, dust deposition, channel blockage and the like, and the catalytic reforming efficiency is seriously influenced. Therefore, how to solve the above problems becomes a technical problem to be solved urgently.
Disclosure of Invention
The utility model discloses to the defect that exists among the prior art, a fluidized bed medium blocks discharge plasma catalytic reforming greenhouse gas device is provided, catalyst solid particle in the fluidized bed reactor keeps suspension and motion, presents the fluidized state, is favorable to going on of heterogeneous reaction, and thermal stability is high, can solve the poor, bed temperature gradient of the heat transmission matter of packed bed reactor effectively, and catalyst sintering, carbon deposit, deposition and jam passageway scheduling problem improve catalytic reforming efficiency.
To the above-mentioned utility model purpose, it is concrete, the utility model relates to a following technical scheme:
the utility model provides a fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device, includes the rotatory coaxial dielectric barrier discharge reactor of external ground electrode, and external ground electrode both ends respectively are provided with can drive external ground electrode pivoted runner 2, runner 3, and the inside upper and lower region of coaxial dielectric barrier discharge reactor respectively has a vibration filter sieve device, and the admission line is provided with can drives the rotatory runner 1 of admission line.
The utility model discloses an advantage of one or more technical scheme is:
(1) in order to solve the problems that the packed bed reactor is easy to cause poor heat and mass transfer effects and large bed temperature gradient, the fluidized bed is used as the reactor, and meanwhile, the rotating wheel is matched to drive the external grounding electrode and the air inlet pipeline to rotate to form rotating airflow, so that the solid particles of the catalyst keep suspension and movement and present a fluidized state, the heterogeneous reaction is facilitated, the thermal stability is high, and the problems that the heat and mass transfer of the packed bed reactor is poor and the bed temperature gradient is large can be effectively solved.
(2) Through setting up the vibration filter sieve device, can realize making gaseous through, prevent that the catalyst granule from leaving the effect of discharging plasma region and preventing that the catalyst granule from blockking up the filter sieve, and then effectively solve catalyst sintering, carbon deposit, deposition and jam passageway scheduling problem, improve catalytic reforming efficiency.
(3) In the reaction process of the optimized device, the plasma catalytic reforming of the methane-carbon dioxide mixed gas is realized under the atmospheric pressure and low temperature condition through the synergistic effect of dielectric barrier discharge, the catalyst and the fluidized bed, and the problems of low conversion rate, high temperature, poor stability and the like of the traditional plasma reforming or catalytic reforming greenhouse gas are effectively solved.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of an apparatus for catalytic reforming greenhouse gases by fluidized bed dielectric barrier discharge plasma in an embodiment;
FIG. 2 is a schematic view of a vibratory screen apparatus in accordance with an embodiment;
in the figure: the gas analysis device comprises a 1-methane gas cylinder, a 2-carbon dioxide gas cylinder, a 3-gas premixing cylinder, a 4-1 rotating wheel, a 5-1 motor, a 6-gas inlet pipeline, a 7-2 rotating wheel, an 8-external grounding electrode, a 9-internal high-voltage electrode, a 10-3 rotating wheel, an 11-nanosecond pulse power supply, a 12-gas outlet, a 13-gas collecting cylinder, a 14-2 motor, a 15-gas analyzer, a 16-computer, a 17-filter screen and an 18-vibrating piece.
Detailed Description
The present invention will be further described with reference to the following embodiments, which are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way, and those skilled in the art may modify the present invention by using the technical content disclosed above and equally modify the present invention. All the technical matters of the present invention do not depart from the technical scope of the present invention, and any simple modification or equivalent changes to the following embodiments are all within the protection scope of the present invention.
As shown in fig. 1-2, a fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device comprises a coaxial dielectric barrier discharge reactor externally connected with a ground electrode for rotation, wherein two ends of the externally connected ground electrode are respectively provided with a 2 # rotating wheel 7 and a 3 # rotating wheel 10 which can drive the externally connected ground electrode to rotate, the upper and lower regions inside the coaxial dielectric barrier discharge reactor are respectively provided with a vibrating screen device, and an air inlet pipeline is provided with a 1 # rotating wheel 4 which can drive the air inlet pipeline for rotation. Wherein, 1 # motor 5 drive 1 # runner 4, and 1 # runner 4 drives inlet channel 6 and rotates.
Placing catalyst particles in the discharge plasma region, keeping the catalyst solid particles in suspension and in motion and in a fluidized state under the action of a rotating gas flow, and further selecting the catalyst from N i/Al2O3、Ag/A l2O3、Pt/A l2O3、Pd/A l2O3、N i/SiO2Zeolite or metallo-organic framework catalysts, preferably N i/A l2O3A catalyst.
In one or more embodiments, the coaxial dielectric barrier discharge reactor comprises an inner high-voltage electrode 9 and an outer grounding electrode 8 which are coaxially arranged, the outer grounding electrode 8 is sleeved outside the quartz glass tube, and a discharge air gap is positioned between the inner high-voltage electrode 9 and the quartz glass tube;
further, the inner high voltage electrode 9 is a stainless steel metal bar;
further, the external grounding electrode 8 is stainless steel;
further, the discharge air gap distance is 3-7mm, preferably 5 mm.
In one or more embodiments, two ends of the external ground electrode 8 are respectively provided with a number 2 rotating wheel 7 and a number 3 rotating wheel 10, the number 2 rotating wheel 7 and the number 3 rotating wheel 10 are jointly controlled by a number 2 motor 14, namely, the internal high-voltage electrode 9 is fixed, the number 2 electricity drives the number 2 rotating wheel 7 and the number 3 rotating wheel 10 14, the number 2 rotating wheel 7 and the number 3 rotating wheel 10 drive the external ground electrode 8 to rotate, and the rotation of the external ground electrode 8 enables the discharge plasma to be more uniform and stable.
In one or more embodiments, the mesh diameter of the screen 17 of the vibrating screen device is smaller than the diameter of the catalyst particles, and a vibrating plate 18 is installed on one side of the screen 17; the gas flows in from the bottom of the fluidized bed and flows out from the top, and the vibrating screen device is used, so that the functions of enabling the gas to pass, preventing catalyst particles from leaving a discharge plasma region and preventing the catalyst particles from blocking the screen can be realized.
In one or more embodiments, the number 1 rotating wheel on the air inlet pipeline 6 is controlled by the number 1 motor 5, and the air inlet pipeline 6 is three air inlet pipelines distributed in an equilateral triangle;
further, what inlet pipe 6 was connected in proper order is gas premixing bottle 3, carbon dioxide gas cylinder 2 and methane gas cylinder 1, be provided with relief pressure valve, flowmeter between methane gas cylinder 1 and the gas premixing bottle 3, be provided with relief pressure valve, flowmeter between carbon dioxide gas cylinder 2 and the gas premixing bottle 3, be provided with relief pressure valve, flowmeter between gas premixing bottle 3 and 1 number runner 4. The methane and the carbon dioxide are respectively regulated in gas pressure and flow by a pressure reducing valve and a flow meter, and form methane-carbon dioxide mixed gas after premixing, and the methane-carbon dioxide mixed gas enters the dielectric barrier discharge reactor.
In one or more embodiments, the nanosecond pulse power supply 11 is connected with the inner high-voltage electrode 9 and supplies power to the coaxial dielectric barrier discharge reactor; the power frequency is 0-15KHz, the amplitude is 0-15KV, and the pulse rising time and pulse falling time are 50-500 ns.
In one or more embodiments, the gas inlet 12 is connected with a gas collecting bottle 13 and a gas analyzer 15 respectively, and a pressure reducing valve and a flow meter are arranged between the gas inlet 12 and the gas analyzer 15.
In one or more embodiments, gas analyzer 15 is connected to computer 16. And the gas product after catalytic reforming enters a gas collecting bottle through a gas outlet, part of the gas product after catalytic reforming enters a gas analyzer, and the gas analyzer detects the product property and transmits the detected result and data to a computer for data analysis.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device which characterized in that, includes the rotatory coaxial dielectric barrier discharge reactor of external ground electrode, and external ground electrode both ends respectively are provided with can drive external ground electrode pivoted runner 2, 3, and the inside upper and lower region of coaxial dielectric barrier discharge reactor respectively has a vibration filter sieve device, and the admission line is provided with can drive the rotatory runner 1 of admission line.
2. The fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device as claimed in claim 1, wherein the coaxial dielectric barrier discharge reactor comprises an inner high voltage electrode and an outer ground electrode which are coaxially arranged, the outer ground electrode is sleeved outside the quartz glass tube, and the discharge air gap is positioned between the inner high voltage electrode and the quartz glass tube.
3. The apparatus for fluidized bed dielectric barrier discharge plasma catalytic reforming of greenhouse gases as claimed in claim 2, wherein said inner high voltage electrode is a stainless steel metal rod.
4. The apparatus for fluidized bed dielectric barrier discharge plasma catalytic reforming of greenhouse gases as claimed in claim 2, wherein said external ground electrode is stainless steel.
5. The apparatus for fluidized bed dielectric barrier discharge plasma catalytic reforming of greenhouse gases as claimed in claim 2, wherein the discharge gap spacing is 3-7 mm.
6. The apparatus for fluidized bed dielectric barrier discharge plasma catalytic reforming of greenhouse gases as claimed in claim 5, wherein the discharge gap spacing is 5 mm.
7. The apparatus for fluidized bed medium barrier discharge plasma catalytic reforming of greenhouse gases as claimed in claim 1, wherein the two ends of the external ground electrode are respectively provided with a 2 # wheel and a 3 # wheel, and the 2 # wheel and the 3 # wheel are controlled by a 2 # motor together.
8. The apparatus of claim 1, wherein the vibrating screen device has a screen with a mesh size smaller than the diameter of the catalyst particles, and a vibrating plate is installed on one side of the screen.
9. The apparatus for fluidized bed dielectric barrier discharge plasma catalytic reforming of greenhouse gases as claimed in claim 1, wherein the number 1 wheel on the gas inlet duct is controlled by a number 1 motor, and the gas inlet duct is three gas inlet ducts distributed in an equilateral triangle.
10. The fluidized bed dielectric barrier discharge plasma catalytic reforming greenhouse gas device as claimed in claim 1, wherein a gas premixing bottle, a carbon dioxide gas bottle and a methane gas bottle are connected with the gas inlet pipeline in sequence, a pressure reducing valve and a flow meter are arranged between the methane gas bottle and the gas premixing bottle, a pressure reducing valve and a flow meter are arranged between the carbon dioxide gas bottle and the gas premixing bottle, and a pressure reducing valve and a flow meter are arranged between the gas premixing bottle and the 1 # rotating wheel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114272858A (en) * | 2022-01-04 | 2022-04-05 | 南京工业大学 | Plasma catalysis system and method for efficient conversion of biomass tar |
| CN114984884A (en) * | 2022-06-17 | 2022-09-02 | 西安交通大学 | Experimental platform for preparing fuel by reforming carbon dioxide with assistance of plasma synergistic catalyst |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114272858A (en) * | 2022-01-04 | 2022-04-05 | 南京工业大学 | Plasma catalysis system and method for efficient conversion of biomass tar |
| CN114272858B (en) * | 2022-01-04 | 2023-02-10 | 南京工业大学 | Plasma catalysis system and method for efficient conversion of biomass tar |
| CN114984884A (en) * | 2022-06-17 | 2022-09-02 | 西安交通大学 | Experimental platform for preparing fuel by reforming carbon dioxide with assistance of plasma synergistic catalyst |
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