CN111405741A - Low-temperature plasma generating device - Google Patents
Low-temperature plasma generating device Download PDFInfo
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- CN111405741A CN111405741A CN202010340316.0A CN202010340316A CN111405741A CN 111405741 A CN111405741 A CN 111405741A CN 202010340316 A CN202010340316 A CN 202010340316A CN 111405741 A CN111405741 A CN 111405741A
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- temperature plasma
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- plasma
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/2406—Generating plasma using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
Abstract
The invention relates to the technical field of plasma, in particular to a low-temperature plasma generating device, which comprises: an air inlet, a plasma outlet and a generating module; the air inlet is used for inputting air to the generation module; the generating module is used for discharging air through dielectric barrier to generate low-temperature plasma; the plasma outlet is used for outputting low-temperature plasma; the generation module comprises: a plurality of discharge generating cylinders arranged in parallel; each discharge generating cartridge is capable of achieving a dielectric barrier discharge. The invention can produce low-temperature plasma efficiently.
Description
Technical Field
The invention relates to the technical field of plasmas, in particular to a low-temperature plasma generating device.
Background
The low-temperature plasma is a substance fourth state following solid, liquid and gas states, and when an external voltage reaches the discharge voltage of the gas, the gas is broken down to generate a mixture including electrons, various ions, atoms and free radicals. Although the electron temperature is high in the discharge process, the heavy particle temperature is low, and the whole system is in a low-temperature state, so that the system is called low-temperature plasma. The low-temperature plasma pollutant degradation utilizes the action of active particles such as high-energy electrons and free radicals and pollutants in exhaust gas to decompose pollutant molecules in a very short time and carry out subsequent various reactions so as to achieve the purpose of degrading pollutants.
Plasma has many applications in the medical field at present, and the safety problem is not found. The plasma has good sterilization effect, quick action, wide sterilization spectrum, no residual harmful substances and no pollution to the environment, and is a novel disinfection mode.
Disclosure of Invention
The invention provides a low-temperature plasma generating device which can efficiently produce low-temperature plasma.
The invention provides a low-temperature plasma generating device, comprising: an air inlet, a plasma outlet and a generating module;
the air inlet is used for inputting air to the generation module;
the generating module is used for discharging air through dielectric barrier to generate low-temperature plasma;
the plasma outlet is used for outputting low-temperature plasma;
the generation module comprises: a plurality of discharge generating cylinders arranged in parallel;
each discharge generating cartridge is capable of achieving a dielectric barrier discharge.
Further, each discharge generating cartridge includes: copper tubes and graphite electrodes;
the graphite electrode is rod-shaped and is arranged inside the copper pipe;
and a gap is reserved between the copper pipe and the graphite electrode.
Further, each of the discharge generating cartridges further includes: a ceramic tube;
the ceramic tube is wrapped outside the graphite electrode and is positioned inside the copper tube;
and a gap is reserved between the ceramic tube and the copper tube as well as between the ceramic tube and the graphite electrode.
Still further, an air dispersion unit is arranged between the air inlet and the generation module;
the air dispersion unit includes: a dispersion cover and a dispersion tray;
the dispersion cover is communicated with the air inlet;
the dispersion disc is fixedly communicated with one end of each discharge generating cylinder;
the dispersing cover is hermetically installed with the edge of the dispersing plate.
Still further, a plasma collecting unit is arranged between the generating module and the plasma outlet;
the plasma collecting unit includes: a collection tray and a collection lid;
the collecting tray is fixedly communicated with the other end of each discharge generating cylinder;
the collecting cover is communicated with the plasma outlet;
the collecting tray and the collecting cover are arranged in a sealed mode at the edge.
Still further, the outer surface of the graphite electrode is coated with a silver plating film.
In the above technical solution, the silver plating film is made of silver nitrate slurry.
Further, the silver nitrate slurry is PP/H with silver nitrate mass fraction of 5 percent2And (3) O emulsion.
Preferably, an air inlet is provided between the air inlet and the air dispersion unit:
drying a tube: for removing moisture from the air entering the air dispersal unit.
Preferably, the drying duct is provided with:
a turbocharger for powering air entering the air dispersal unit.
In the invention, the generating module generates low-temperature plasma by a method of dielectric barrier discharge of air. Each discharge generating cylinder in the generating module can generate low-temperature plasma, so that the efficiency of generating the low-temperature plasma is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of an explosive structure according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the low-temperature plasma generating apparatus provided in this embodiment includes: an air inlet 1, a plasma outlet 2 and a generating module 3;
the air inlet 1 is used for inputting air to the generation module 3;
the generating module 3 is used for discharging air through dielectric barrier to generate low-temperature plasma;
the plasma outlet 2 is used for outputting low-temperature plasma;
the generating module 3 comprises: a plurality of discharge generating cylinders 4 arranged in parallel;
each discharge generating cartridge 4 is capable of realizing a dielectric barrier discharge.
In the embodiment, the generating module 3 generates low-temperature plasma by passing air through a dielectric barrier discharge method. Each of the discharge generating cylinders 4 in the generating module 3 can generate low-temperature plasma, thereby improving the efficiency of generating low-temperature plasma.
Each discharge generating cylinder 4 includes: copper tube 4.1 and graphite electrode 4.2;
the graphite electrode 4.2 is rod-shaped and is arranged inside the copper pipe 4.1;
a gap is left between the copper tube 4.1 and the graphite electrode 4.2.
Each discharge generating cylinder 4 further includes: 4.3 of a ceramic tube;
the ceramic tube 4.3 is wrapped outside the graphite electrode 4.2 and is positioned inside the copper tube 4.1;
a gap is reserved between the ceramic tube 4.3 and the copper tube 4.1 and between the ceramic tube and the graphite electrode 4.2.
In the present embodiment, the copper tube 4.1, the ceramic tube 4.3 and the graphite electrode 4.2 are coaxially arranged, and for the corresponding section radius: the graphite electrode 4.2 is smaller than the ceramic tube 4.3 and smaller than the copper tube 4.1. The copper tube 4.1 and the graphite electrode 4.2 are respectively connected with an external power supply.
After air enters the discharge generating cylinders 4 from one end of each discharge generating cylinder, the copper tubes 4.1, the graphite electrodes 4.2 and the ceramic tubes 4.3 generate dielectric barrier discharge; generating low-temperature plasma in the gap in the copper tube 4.1; then, the low-temperature plasma inert air is output from the other end of each discharge generating cylinder 4.
An air dispersion unit 5 is arranged between the air inlet 1 and the generation module 3;
the air dispersion unit 5 includes: a dispersion cover 5.1 and a dispersion disc 5.2;
the dispersion cover 5.1 is communicated with the air inlet 1;
the dispersion disc 5.2 is fixedly communicated with one end of each discharge generating cylinder 4;
the dispersing cover 5.1 is arranged with the edge of the dispersing plate 5.2 in a sealing way.
In the present embodiment, the air dispersing unit 5 serves to uniformly distribute the intake air to each of the discharge generating tubes 4.
A plasma collecting unit 6 is arranged between the generating module 3 and the plasma outlet 2;
the plasma collecting unit 6 includes: a collection tray 6.1 and a collection lid 6.2;
the collecting tray 6.1 is fixedly communicated with the other end of each discharge generating cylinder 4;
the collecting cover 6.2 is communicated with the plasma outlet 2;
the collecting tray 6.1 and the collecting cover 6.2 are mounted edge-sealed.
In the present embodiment, the plasma collecting unit 6 functions to collect the low-temperature plasma generated from each discharge generating tube 4 and then transmit the collected low-temperature plasma to the plasma outlet 2.
The outer surface of the graphite electrode 4.2 is coated with a silver-plated film.
The silver plating film is composed of silver nitrate slurry.
The silver nitrate slurry is PP/H with silver nitrate mass fraction of 5 percent2And (3) O emulsion.
The graphite fiber is a material with a molecular structure which is graphitized, has layered hexagonal lattices with the carbon content of more than 99 percent, and has excellent conductivity due to the shape of sharp edge fibers of a graphite fiber rod and the large quantity of the fibers, the surface of the graphite fiber rod is modified to obtain more excellent performance, and tests show that the resistivity of the graphite fiber rod can be effectively reduced by plating silver on the surface of the graphite fiber rod by using a method of thermally decomposing silver nitrate, the energy consumption for exciting plasma is reduced, and the service life of the graphite fiber rod is prolonged.
Between the air inlet 1 and the air dispersion unit 5 are provided:
drying a tube: for removing moisture from the air entering the air dispersion unit 5.
One side of the last income air of drying tube is provided with:
a turbocharger for powering the air entering the air dispersion unit 5.
In the embodiment, due to the existence of the turbocharger, the air entering the air dispersion unit 5 is provided with power, and the air entering the generation module 3 for dielectric barrier discharge provides power; so that the air can drive the generated low-temperature plasma to enter the plasma collecting unit 6 from the generating module 3 and then to be discharged from the plasma outlet 2.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A low-temperature plasma generating apparatus, comprising: an air inlet (1), a plasma outlet (2) and a generating module (3);
the air inlet (1) is used for inputting air to the generation module (3);
the generating module (3) is used for discharging air through dielectric barrier to generate low-temperature plasma;
the plasma outlet (2) is used for outputting low-temperature plasma;
the generation module (3) comprises: a plurality of discharge generating cylinders (4) arranged in parallel;
each discharge generating cartridge (4) is capable of effecting a dielectric barrier discharge.
2. A low-temperature plasma generating apparatus according to claim 1, wherein each discharge generating cylinder (4) comprises: a copper pipe (4.1) and a graphite electrode (4.2);
the graphite electrode (4.2) is rod-shaped and is arranged inside the copper pipe (4.1);
and a gap is reserved between the copper pipe (4.1) and the graphite electrode (4.2).
3. A low-temperature plasma generating apparatus according to claim 2, wherein each of the discharge generating cylinders (4) further comprises: a ceramic tube (4.3);
the ceramic tube (4.3) is wrapped outside the graphite electrode (4.2) and is positioned inside the copper tube (4.1);
gaps are reserved among the ceramic tube (4.3), the copper tube (4.1) and the graphite electrode (4.2).
4. A low-temperature plasma generating device according to claim 3, characterized in that an air dispersion unit (5) is arranged between the air inlet (1) and the generating module (3);
the air dispersion unit (5) comprises: a dispersion cover (5.1) and a dispersion tray (5.2);
the dispersion cover (5.1) is communicated with the air inlet (1);
the dispersion disc (5.2) is fixedly communicated with one end of each discharge generating cylinder (4);
the dispersing cover (5.1) and the edge of the dispersing disc (5.2) are installed in a sealing mode.
5. A low-temperature plasma generating device according to claim 4, characterized in that a plasma collecting unit (6) is arranged between the generating module (3) and the plasma outlet (2);
the plasma collection unit (6) comprises: a collection tray (6.1) and a collection cover (6.2);
the collecting tray (6.1) is fixedly communicated with the other end of each discharge generating cylinder (4);
the collecting cover (6.2) is communicated with the plasma outlet (2);
the collecting tray (6.1) and the collecting cover (6.2) are arranged in a sealing way at the edges.
6. A low temperature plasma-generating device according to claim 3, characterized in that the outer surface of the graphite electrode (4.2) is coated with a silver-plated film.
7. A low-temperature plasma generating apparatus according to claim 6, wherein the silver plating film is made of silver nitrate slurry.
8. The low-temperature plasma generation device as claimed in claim 7, wherein the silver nitrate slurry is PP/H with silver nitrate mass fraction of 5 percent2And (3) O emulsion.
9. A low temperature plasma generating device according to claim 4, wherein between the air inlet (1) and the air dispersion unit (5) is provided:
drying a tube: for removing moisture from the air entering the air dispersion unit (5).
10. A low-temperature plasma generating apparatus according to claim 9, wherein a side of the drying duct on which the air is introduced is provided with:
a turbocharger for powering air entering the air dispersion unit (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010340316.0A CN111405741A (en) | 2020-04-26 | 2020-04-26 | Low-temperature plasma generating device |
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| CN202010340316.0A CN111405741A (en) | 2020-04-26 | 2020-04-26 | Low-temperature plasma generating device |
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