CN217511839U - Plasma natural gas cracking device - Google Patents
Plasma natural gas cracking device Download PDFInfo
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- CN217511839U CN217511839U CN202122416431.4U CN202122416431U CN217511839U CN 217511839 U CN217511839 U CN 217511839U CN 202122416431 U CN202122416431 U CN 202122416431U CN 217511839 U CN217511839 U CN 217511839U
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- natural gas
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Abstract
The utility model belongs to the technical field of plasma chemical equipment, and discloses a plasma natural gas cracking device, which comprises a shell, a water cooling jacket, an outer conductor, an inner conductor and a cooling chamber; the cooling chamber is connected to the right end of the shell, and the water cooling jacket is sleeved on the outer side of the shell; the outer conductor is arranged on the inner side of the left end of the shell, the outer conductor is arranged on the outer side of the inner conductor, the inner conductor is of a hollow structure, the right side of the inner conductor is connected with a conductive circular tube, the conductive circular tube is electrically connected with a direct-current power supply through a connecting circuit, and a tube cavity of the conductive circular tube is a reaction cavity; the reaction product outlet at the right end of the outer conductor is connected to the cooling chamber, the upper end and the lower end of the cooling chamber are respectively provided with a plurality of spray heads, and the lower end of the right side of the cooling chamber is communicated with a discharge hole. The utility model discloses a conductive pipe is high temperature resistant, electric conductive property is good, adopts insulating medium to separate between outer conductor and the conductive pipe, and its structure, technology are reasonable, can the increasing the heat efficiency.
Description
Technical Field
The utility model belongs to the technical field of plasma chemical plant, especially, relate to a plasma schizolysis natural gas device.
Background
At present: natural gas is an energy source with abundant reserves in nature. In recent years, due to the decreasing of petroleum resources and the instability of petroleum markets, how to efficiently convert natural gas into high-value-added chemical products is a research topic of great interest in academic and industrial departments. Most natural gas is distributed in remote areas and has high transportation cost, so people usually want to convert the natural gas into high-carbon products which are convenient to transport on site. The main component of natural gas is methane, and because methane has high chemical stability, the high-efficiency conversion and utilization of methane are difficult to realize by adopting the conventional catalytic technology.
The plasma has high specific energy density, contains a large amount of high-energy electrons, ions and neutral particles, and has wide application prospects in the aspects of material surface modification, metal smelting, plasma chemical synthesis, toxic and harmful waste treatment and the like. A large number of research results show that: the plasma has strong activation capability and can provide suitable conditions for the activation and direct conversion of methane; in addition, the plasma has high energy density, so that a large amount of reactants can be treated in a short time and a small reaction area, thereby greatly reducing the reaction device and saving the device investment.
In recent years, direct conversion of natural gas by using normal-pressure low-temperature plasma such as mercerization discharge, sliding arc discharge, dielectric barrier discharge and the like has been widely studied. Although the low-temperature plasma can better control the reaction process, the stability of the equipment is higher than that of a high-temperature direct-current electric arc, the conversion rate of natural gas is lower, and the single-pass yield of acetylene is less than 40%. How to improve the conversion efficiency of the conventional low-temperature plasma or reduce the energy consumption of the conventional arc plasma to improve the service life of the electrode is still a technical problem to be solved.
Through the above analysis, the problems and defects of the prior art are as follows:
the existing plasma natural gas cracking device has the advantages of low natural gas conversion rate, high energy consumption of plasma and short electrode service life.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model provides a plasma schizolysis natural gas device.
The utility model is realized in such a way that the plasma natural gas cracking device is provided with a shell, a water cooling jacket, an outer conductor, an inner conductor and a cooling chamber;
the cooling chamber is connected to the right end of the shell, and the water cooling jacket is sleeved on the outer side of the shell;
the outer conductor is arranged on the inner side of the left end of the shell, the outer conductor is arranged on the outer side of the inner conductor, the inner conductor is of a hollow structure, the right side of the inner conductor is connected with a conductive circular tube, the conductive circular tube is electrically connected with a direct-current power supply through a connecting circuit, and a tube cavity of the conductive circular tube is a reaction cavity;
the reaction product outlet at the right end of the outer conductor is connected to the cooling chamber, the upper end and the lower end of the cooling chamber are respectively provided with a plurality of spray heads, and the lower end of the right side of the cooling chamber is communicated with a discharge hole.
Further, a heat insulation layer is laid between the conductive circular tube and the water cooling jacket, and an insulation layer is arranged between the shell and the water cooling jacket.
Furthermore, a high-temperature wave-transmitting medium layer is arranged on the outer side of the inner conductor, and a channel for gas to enter is formed in the high-temperature wave-transmitting medium layer.
Further, an insulating medium layer is clamped between the outer conductor and the conductive circular tube, the insulating medium layer is connected to a channel for gas to enter, and the insulating medium is made of temperature-resistant insulating materials such as aluminum oxide, boron nitride or quartz.
Furthermore, a support frame is fixed at the lower end of the shell through a nut, and a cooling water inlet pipe communicated with the water cooling jacket is fixed in the middle of the support frame.
Furthermore, an observation port is formed in the middle of the right end of the cooling chamber, and a transparent material layer is fixed on the outer side of the observation port.
Combine foretell all technical scheme, the utility model discloses the advantage that possesses and positive effect are:
because the arc roots of the plasma of the device are uniformly distributed on the surface of the electrode, the energy distribution of the plasma reaction cavity on the cross section is uniform, and the improvement of the one-way conversion rate and the selectivity of the plasma chemical reaction is facilitated. The utility model discloses a conductive circular tube is high temperature resistant, electric conductive property is good, and conventional direct current plasma arouses the gas entrance of mechanism, adopts insulating medium to separate between outer conductor and the conductive circular tube, and reaction gas injects into the reaction chamber tangential that conductive circular tube formed through the tangential passageway on two terminal surfaces about insulating medium, and its structure, technology are reasonable, can the increasing of heat efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for cracking natural gas by using plasma according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a cooling water inlet pipe according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of an air inlet according to an embodiment of the present invention.
In the figure: 1. a cooling water outlet; 2. a housing; 3. a thermal insulation layer; 4. a spray head; 5. a viewing port; 6. a discharge port; 7. a cooling chamber; 8. a water cooling jacket; 9. a power source; 10. a nut; 11. a cooling water inlet pipe; 12. an insulating layer; 13. a conductive circular tube; 14. an insulating dielectric layer; 15. an outer conductor; 16. a channel; 17. an inner conductor; 18. an air inlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
To the problem that prior art exists, the utility model provides a plasma schizolysis natural gas device, it is right below to combine the figure the utility model discloses do detailed description.
As shown in fig. 1 to fig. 3, the device for cracking natural gas by plasma in the embodiment of the present invention includes: the water cooling jacket 8, the outer conductor 15 and the cooling chamber 7. The outer conductor 15 is arranged on the outer side of the inner conductor 17, the inner conductor 17 is of a hollow structure, the right side of the inner conductor 17 is connected with the conductive circular tube 13, the outer conductor 15 is a cathode, the conductive circular tube 13 is an anode, the conductive circular tube 13 is electrically connected with a direct-current power supply through an anti-current structure, and a tube cavity of the conductive circular tube 13 is a reaction cavity. The lower end of the right side of the cooling chamber is communicated with a discharge hole.
As preferred, the water cooling jacket 8 is installed in the outside of electrically conductive pipe 13 in the embodiment of the present invention, insulating layer 3 has been laid between electrically conductive pipe 13 and water cooling jacket 8, shell 2 is equipped with in the outside of water cooling jacket 8, electrically conductive pipe 13 adopts materials such as graphite or carborundum, and it is high temperature resistant, electrically conductive good.
Preferably, a high temperature wave-transparent medium is installed outside the inner conductor 17 in the embodiment of the present invention, and the high temperature wave-transparent medium is provided with a channel 16 for gas to enter.
Preferably, the outer conductor 15 and the circular conductive tube 13 in the embodiment of the present invention are separated by an insulating medium layer 14, the insulating medium layer 14 is connected to a channel 16 for gas to enter, and the insulating medium 14 is made of a temperature-resistant insulating material, such as alumina, boron nitride, or quartz.
Preferably, the reaction product outlet of the dc plasma generated by the outer conductor 15 in the embodiment of the present invention is connected to the cooling chamber 7, and the upper end and the lower end of the cooling chamber 7 are provided with a plurality of nozzles 4.
Preferably, an insulating layer is arranged between the shell 2 and the water cooling jacket 8 in the embodiment of the invention.
Preferably, the lower end of the housing 2 in the embodiment of the present invention is fixed with a support frame through a nut, and a cooling water inlet pipe 11 communicated with the water jacket is fixed in the middle of the support frame.
Preferably, the cooling chamber 7 in the embodiment of the present invention has a viewing port 5 formed in the middle of the right end, and a transparent material layer is fixed outside the viewing port 5.
The utility model discloses when using, the ordinary pressure microwave plasma torch through outer conductor 15 carries out ionization in advance to some plasma reaction gas of part, utilize the gas mixture of hydrogen or hydrogen and natural gas to produce plasma in microwave plasma torch, microwave plasma gets into the reaction gas that ordinary pressure microwave plasma torch got into conventional direct current plasma excitation mechanism through outer conductor 15's spout and is hydrogen or the gas mixture of hydrogen and natural gas, the reaction gas that income gas mouth 18 got into conventional direct current plasma excitation mechanism is the gas mixture of hydrogen and natural gas, reaction gas injects into the reaction chamber tangential of power-conducting circular tube 13 formation through passageway 16 on insulating medium 14 upper and lower two terminal surfaces, because the initiation of microwave plasma with under external direct current power supply's the effect, form conventional direct current plasma, supplement sufficient energy for the reaction system, the reaction of preparing the second block by natural gas cracking is carried out, and the working voltage and current of the conventional plasma are changed by adjusting the inner diameter of the conductive circular tube 13, the ratio of the natural gas to the hydrogen and the total flow of the gas, so that the plasma works in a high-voltage and low-current mode, the energy efficiency of the plasma is improved, and the ablation rate of the electrode is further reduced.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art should be covered by the protection scope of the present invention within the technical scope of the present invention, any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention.
Claims (6)
1. The device for cracking the natural gas by using the plasma is characterized by comprising a shell, a water cooling jacket, an outer conductor, an inner conductor and a cooling chamber, wherein the shell is arranged on the shell;
the cooling chamber is connected to the right end of the shell, and the water cooling jacket is sleeved on the outer side of the shell;
the outer conductor is arranged on the inner side of the left end of the shell, the outer conductor is arranged on the outer side of the inner conductor, the inner conductor is of a hollow structure, the right side of the inner conductor is connected with a conductive circular tube, the conductive circular tube is electrically connected with a direct-current power supply through a connecting circuit, and a tube cavity of the conductive circular tube is a reaction cavity;
the reaction product outlet at the right end of the outer conductor is connected to the cooling chamber, the upper end and the lower end of the cooling chamber are respectively provided with a plurality of spray heads, and the lower end of the right side of the cooling chamber is communicated with a discharge hole.
2. The device for cracking natural gas by plasma as claimed in claim 1, wherein a heat insulation layer is laid between the conductive circular tube and the water cooling jacket, and an insulation layer is arranged between the outer shell and the water cooling jacket.
3. The plasma natural gas cracking device according to claim 1, wherein a high temperature wave-transparent medium layer is arranged outside the inner conductor, and a gas inlet channel is arranged on the high temperature wave-transparent medium layer.
4. The plasma natural gas cracking device according to claim 1, wherein an insulating medium layer is sandwiched between the outer conductor and the conductive circular tube, the insulating medium layer is connected to a gas inlet channel, and the insulating medium is made of temperature-resistant insulating materials such as alumina, boron nitride or quartz.
5. The plasma natural gas cracking device of claim 1, wherein a support frame is fixed at the lower end of the shell through a nut, and a cooling water inlet pipe communicated with the water cooling jacket is fixed in the middle of the support frame.
6. The apparatus for plasma cracking of natural gas as claimed in claim 1, wherein the cooling chamber has a viewing port at the right end, and a transparent material layer is fixed outside the viewing port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122416431.4U CN217511839U (en) | 2021-10-08 | 2021-10-08 | Plasma natural gas cracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122416431.4U CN217511839U (en) | 2021-10-08 | 2021-10-08 | Plasma natural gas cracking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217511839U true CN217511839U (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122416431.4U Active CN217511839U (en) | 2021-10-08 | 2021-10-08 | Plasma natural gas cracking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217511839U (en) |
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2021
- 2021-10-08 CN CN202122416431.4U patent/CN217511839U/en active Active
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