CN113630949A - Large-area low-temperature plasma activated water mist generating device - Google Patents
Large-area low-temperature plasma activated water mist generating device Download PDFInfo
- Publication number
- CN113630949A CN113630949A CN202111007766.9A CN202111007766A CN113630949A CN 113630949 A CN113630949 A CN 113630949A CN 202111007766 A CN202111007766 A CN 202111007766A CN 113630949 A CN113630949 A CN 113630949A
- Authority
- CN
- China
- Prior art keywords
- electrodes
- voltage
- mist generating
- water mist
- generating device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
Abstract
The invention relates to the technical field of disinfection and sterilization, and discloses a large-area low-temperature plasma activated water mist generating device, which comprises a high-voltage pulse power supply, and a water mist generating device, a gas conveying pipe and a discharging device which are sequentially connected, wherein the discharging device comprises a shell, and an outlet is formed in the lower part of the shell; a plurality of layers of parallel line electrodes are arranged in the shell to form a discharge array; each layer of line electrodes comprises a plurality of electrodes, wherein in the ith layer of line electrodes, odd electrodes are used as high-voltage electrodes, and even electrodes are used as ground electrodes; in the (i-1) th or (i + 1) th layer of line electrodes, even electrodes are used as high-voltage electrodes, and odd electrodes are used as ground electrodes; the high-voltage electrode is connected with a high-voltage pulse power supply, the ground electrode is connected with the ground, and discharge plasma is generated between the high-voltage electrode and the ground electrode. The invention solves the problems of small area of discharge plasma and easy instability of discharge in the generation of plasma activated water mist.
Description
Technical Field
The invention relates to the technical field of disinfection and sterilization, in particular to a large-area low-temperature plasma activated water mist generating device.
Background
Modern war burns occur in batches, compound injuries are more, the injury is complex, and along with the development of high and new weapons, the proportion of the burns to the total number of the wounded is greatly increased. Because the necrotic tissue of the skin burn wound surface is a good culture medium of bacteria, including staphylococcus aureus, pseudomonas aeruginosa and the like, the serious burn can also be infected by anaerobic bacteria, viruses and the like. It has become an urgent need to find a new method for emergency disinfection and sterilization treatment of skin burns in wartime.
The plasma is called the fourth state of matter and is the product of gas ionization. The low-temperature plasma generated by the high-voltage pulse has the remarkable advantages of a large amount of active particles, temperature close to room temperature and the like. Researches show that active particles such as hydroxyl free radicals, singlet oxygen and the like rich in low-temperature plasma have obvious disinfection and sterilization effects and can quickly kill staphylococcus aureus, escherichia coli, novel coronavirus and the like. In recent years, the active particles in the low-temperature plasma have short service life and small action distance in gas, so that the interaction between the low-temperature plasma and an aqueous solution is adopted to generate plasma activated water, active substances are converted and stored in liquid water, and then the plasma activated water is used for disinfection and sterilization. Although the plasma activated water can kill bacteria and viruses more quickly and effectively compared with the traditional hydrogen peroxide and the like, the existing plasma activated water needs preparation time of an hour level, active particles are quickly attenuated, the effective storage time is less than one hour, and the application of the plasma activated water in emergency disinfection and sterilization of skin burns in wartime is greatly limited.
Researches show that the water mist is combined with plasma, the disinfection and sterilization effect is better, and the water mist is micron-sized water particles, so that low-temperature plasma is generated in the water mist, and the plasma-generating water mist has the following remarkable advantages: 1) the ratio of the surface area to the volume of the water particles is very large, and the method is suitable for the conversion of plasma active substances; 2) the preparation is rapid, and the contact of the plasma and the water particles is more effective; 3) the water particles are easy to be charged, and the bacteria and viruses are further killed by physical effects of an additional microscopic strong electric field and the like.
However, it is difficult to generate stable low-temperature discharge plasma in water mist, which is expressed as follows: the water mist gas has strong electronegativity, discharge is easy to be converted into filament discharge, and large-area discharge plasma is difficult to generate; as the humidity increases, the temperature in the discharge area rapidly increases, causing discharge instability and possibly generating harmful spark discharge. In addition, in order to generate discharge plasmas with different active groups and sizes, a plurality of different working gases including rare gases such as helium and electronegative gases such as air are generally adopted, and the applicability of a single generating device is poor.
Through search, the patent name of CN110693692A is "a plasma activated mist preparation device", which comprises: the device comprises a liquid atomization module, a gas output module, a high-voltage power supply and a gas ionization atomization module. The liquid atomization module atomizes the liquid and then leads the liquid into the gas ionization atomization module; the gas output module provides working gas for the gas ionization and atomization module; the gas ionization atomization module ionizes the working gas under the action of the high-voltage power supply to generate plasma active particles, and the plasma active particles are adsorbed on atomized liquid drops to form plasma activated mist. However, in the patent document, a common needle-ring electrode structure is adopted, a local strong electric field is generated at a pointed electrode such as a tungsten rod, the area of the generated plasma is relatively small, and the plasma is driven by a medium-frequency alternating current power supply, and due to the fact that the voltage action time is long, discharge can be converted into spark discharge, and application safety is threatened.
Disclosure of Invention
The invention aims to provide a large-area low-temperature plasma activated water mist generating device, which solves the problems of small discharge plasma area and easy unstable discharge in the generation of plasma activated water mist.
The invention is realized by the following technical scheme:
a large-area low-temperature plasma activated water mist generating device comprises a high-voltage pulse power supply, a water mist generating device, a gas pipe and a discharging device, wherein the discharging device comprises a shell, an inlet is formed in the upper part of the shell, an outlet is formed in the lower part of the shell, and the water mist generating device is connected with the inlet of the discharging device through the gas pipe;
a plurality of layers of line electrodes are arranged in the shell and arranged in parallel to form a discharge array; each layer of line electrodes comprises a plurality of electrodes, wherein in the ith layer of line electrodes, odd electrodes are used as high-voltage electrodes, and even electrodes are used as ground electrodes; in the (i-1) th or (i + 1) th layer of line electrodes, even electrodes are used as high-voltage electrodes, and odd electrodes are used as ground electrodes;
the high-voltage electrode is connected with a high-voltage pulse power supply, the ground electrode is connected with the ground, and discharge plasma is generated between the high-voltage electrode and the ground electrode.
Further, the shell is filled with working gas, and the working gas is rare gas.
Further, helium or argon is used as the rare gas.
Furthermore, a temperature monitoring device is arranged on the inner wall of the shell.
Further, the temperature monitoring device is arranged on the lower side of the shell.
Further, the high voltage electrode and the ground electrode are both made of metal.
Further, the high-voltage pulse power supply adopts a repetition frequency high-voltage nanosecond pulse power supply.
Further, the parameters of the high-voltage pulse power supply are as follows: the voltage amplitude is 10kV or more, the pulse frequency is more than 1kHz, and the pulse width is less than 100 ns.
Further, each layer of line electrodes includes an even number of electrodes.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a low-temperature plasma activated water mist generating device, which comprises a high-voltage pulse power supply, a water mist generating device, a gas pipe and a discharging device, wherein the water mist generating device is connected with the discharging device through the gas pipe. The invention designs a discharge device, wherein a plurality of layers of parallel line electrodes are arranged in the discharge device, in the same layer of line electrodes, odd electrodes are used as high-voltage motors, even electrodes are used as ground electrodes, the connection sequence in different layers is sequentially changed and the electrodes are arranged in a crossed manner, the connection mode is favorable for enhancing the space electric field, so that the space electric field distribution is more uniform, the strong electric field uniformly distributed in the space is favorable for promoting the multipoint and synchronous development of discharge in the space, and compared with the traditional sharp electrodes such as tungsten rods, the invention only generates local high field intensity and is favorable for generating large-area discharge plasma.
Further, the high-voltage pulse power supply adopts a repetition frequency high-voltage nanosecond pulse power supply, and the development of discharge towards an unstable direction is effectively inhibited by improving input voltage (the voltage amplitude is larger than 10kV) and limiting the voltage action time to be in a hundred-nanosecond time scale (the pulse width is smaller than 100 ns).
Drawings
FIG. 1 is a schematic structural diagram of a low-temperature plasma activated water mist generating device according to the invention;
FIG. 2 is a schematic view of the electrode arrangement of the discharge device of example 1;
FIG. 3 is the spatial electric field distribution of the line electrode array of the present invention;
FIG. 4 is a spatial electric field distribution for a needle-ring electrode.
In fig. 1: 1 is a high-voltage pulse power supply, 2 is a water mist generating device, 3 is a gas conveying pipe, 4 is a discharging device, and 5 is a temperature monitoring device.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in figure 1, the invention discloses a large-area low-temperature plasma activated water mist generating device, which comprises a high-voltage pulse power supply 1, a water mist generating device 2, a gas pipe 3 and a discharging device 4, wherein the water mist generating device 2 is connected with the discharging device 4 through the gas pipe 3; the discharge device 4 comprises a housing, and an outlet is formed below the housing.
The water mist generating device 2 based on the ultrasonic atomization technology and the like is adopted to generate water mist with certain humidity, and the water mist is transported to the discharging device 4 through the gas conveying pipe 3.
The pulse power supply can generate high-voltage nanosecond pulses with repetition frequencies of different electrical parameters (such as voltage, pulse frequency, pulse width and voltage polarity), and by increasing input voltage (voltage amplitude is larger than 10kV) and limiting voltage action time to be in a hundred-nanosecond time scale (pulse width is smaller than 100ns), the extremely-short pulse action time is beneficial to inhibiting the instability development of discharge plasma and is beneficial to generating large-area discharge plasma.
The large-area low-temperature discharge plasma generated in the discharge area is led out from the outlet and acts on the surface of the burned skin, so that the disinfection and sterilization effects are achieved.
And a temperature monitoring device 5 is arranged on the inner wall of the shell and on the lower side of the shell, and the temperature monitoring device 5 is used for measuring the temperature of gas at the outlet of the discharging device 4 in real time, feeding the temperature back to the high-voltage nanosecond pulse power supply with the repetition frequency and dynamically optimizing output parameters.
In order to generate a large-area stable discharge plasma, and considering that the actual working gas generally adopts rare gas, the core point is that a plurality of single or small-area plasmas are converged to generate a large-area discharge plasma.
As shown in fig. 2, when the working gas is a rare gas, the discharge device 4 employs a discharge array composed of a plurality of parallel line electrodes, in the same layer of line electrodes, the odd-numbered electrodes are connected to the high-voltage pulse power supply 1 as high-voltage electrodes, the even-numbered electrodes are connected to the ground as ground electrodes, the connection order in different layers is changed in sequence, for example, the second layer of odd-numbered electrodes is connected to the ground, and the even-numbered electrodes are connected to the high-voltage pulse power supply 1. The connection mode is beneficial to enhancing the space electric field, so that the distribution of the space electric field is more uniform. The strong electric field which is uniformly distributed in the space is beneficial to promoting the multi-point and synchronous development of discharge in the space, and compared with the traditional sharp electrodes such as a tungsten rod, the plasma generating device only generates local high field intensity and is beneficial to generating large-area discharge plasma.
It can be seen from the comparison between fig. 3 and fig. 4 that the electric field distribution in the space of the parallel line electrode array is relatively uniform, no obvious electric field distortion point exists, and the parallel line electrode array is suitable for generating large-area discharge plasma in rare gases such as helium, argon and the like.
Claims (9)
1. A large-area low-temperature plasma activated water mist generating device is characterized by comprising a high-voltage pulse power supply (1), a water mist generating device (2), a gas pipe (3) and a discharging device (4), wherein the discharging device (4) comprises a shell, an inlet is formed in the upper part of the shell, an outlet is formed in the lower part of the shell, and the water mist generating device (2) is connected with the inlet of the discharging device (4) through the gas pipe (3);
a plurality of layers of line electrodes are arranged in the shell and arranged in parallel to form a discharge array; each layer of line electrodes comprises a plurality of electrodes, wherein in the ith layer of line electrodes, odd electrodes are used as high-voltage electrodes, and even electrodes are used as ground electrodes; in the (i-1) th or (i + 1) th layer of line electrodes, even electrodes are used as high-voltage electrodes, and odd electrodes are used as ground electrodes;
the high-voltage electrode is connected with a high-voltage pulse power supply (1), the ground electrode is connected with the ground, and discharge plasma is generated between the high-voltage electrode and the ground electrode.
2. The large-area low-temperature plasma activated water mist generating device as claimed in claim 1, wherein the housing is filled with a working gas, and the working gas is a rare gas.
3. The large-area low-temperature plasma activated water mist generating device as claimed in claim 2, wherein the rare gas is helium or argon.
4. The large-area low-temperature plasma activated water mist generating device as claimed in claim 1, wherein the inner wall of the shell is provided with a temperature monitoring device (5).
5. A large area low temperature plasma activated mist generating device as claimed in claim 4, wherein the temperature monitoring means (5) is provided on the underside of the housing.
6. The large area low temperature plasma activated mist generating apparatus of claim 1, wherein the high voltage electrode and the ground electrode are made of metal.
7. The large-area low-temperature plasma activated water mist generating device as claimed in claim 1, wherein the high-voltage pulse power supply (1) adopts a repetition frequency high-voltage nanosecond pulse power supply.
8. The large-area low-temperature plasma activated water mist generating device as claimed in claim 1, wherein the parameters of the high-voltage pulse power supply (1) are as follows: the voltage amplitude is 10kV or more, the pulse frequency is more than 1kHz, and the pulse width is less than 100 ns.
9. The large area low temperature plasma activated mist generating apparatus of claim 1, wherein each layer of wire electrodes comprises an even number of electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111007766.9A CN113630949A (en) | 2021-08-30 | 2021-08-30 | Large-area low-temperature plasma activated water mist generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111007766.9A CN113630949A (en) | 2021-08-30 | 2021-08-30 | Large-area low-temperature plasma activated water mist generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113630949A true CN113630949A (en) | 2021-11-09 |
Family
ID=78388554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111007766.9A Pending CN113630949A (en) | 2021-08-30 | 2021-08-30 | Large-area low-temperature plasma activated water mist generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113630949A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745839A (en) * | 2022-05-13 | 2022-07-12 | 大连理工大学 | Surface-body coupling discharge plasma device based on seed electron generation |
| WO2024021306A1 (en) * | 2022-07-28 | 2024-02-01 | 中国科学院苏州生物医学工程技术研究所 | Non-contact high-voltage pulse device |
-
2021
- 2021-08-30 CN CN202111007766.9A patent/CN113630949A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745839A (en) * | 2022-05-13 | 2022-07-12 | 大连理工大学 | Surface-body coupling discharge plasma device based on seed electron generation |
| CN114745839B (en) * | 2022-05-13 | 2023-02-28 | 大连理工大学 | Surface-body coupling discharge plasma device based on seed electron generation |
| WO2024021306A1 (en) * | 2022-07-28 | 2024-02-01 | 中国科学院苏州生物医学工程技术研究所 | Non-contact high-voltage pulse device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113630949A (en) | Large-area low-temperature plasma activated water mist generating device | |
| CN203167413U (en) | Atmospheric-pressure dispersion-type cold plasma generator | |
| US8173075B2 (en) | Device for generation of pulsed corona discharge | |
| CN106028616A (en) | Gliding arc discharge plasma jet generation device and method thereof | |
| CN103945627A (en) | Handheld large-area low-temperature plasma generator | |
| Huang et al. | Escherichia coli inactivation in water using pulsed discharge | |
| CN111010790A (en) | Dielectric barrier discharge plasma reactor and sterilizing device | |
| CN103052250A (en) | Atmospheric pressure dispersion type cold plasma generation device | |
| CN215499699U (en) | Large-area low-temperature plasma activated water mist generating device | |
| CN103917035A (en) | Device for handling particles and gaseous material using non equilibrium plasma | |
| CN113175721A (en) | Plasma humidifier | |
| CN105817125A (en) | Device for producing plasmas through multi-channel dielectric barrier discharging | |
| CN114501761B (en) | Atmospheric pressure pulse discharge plasma generating device of suspension conductive electrode | |
| CN205812485U (en) | A kind of Gliding arc discharge plasma mjector | |
| Rahardian et al. | Effective medical ozone production using mesh electrodes in double dielectric barrier type plasma generators | |
| CN217763742U (en) | Plasma humidifier | |
| Xue et al. | Design and characteristics investigation of a miniature low-temperature plasma spark discharge device | |
| WO2011125252A1 (en) | Plasma sterilization device | |
| CN114262031A (en) | Gas-liquid two-phase discharge dielectric barrier type low-temperature plasma water treatment device | |
| CN113877384B (en) | High-power plasma gas purification device | |
| CN111420109A (en) | Electromagnetic pulse synergistic plasma efficient air purification and disinfection equipment | |
| CN105344212A (en) | Single-dielectric barrier low temperature plasma discharge module | |
| CN216148651U (en) | Cold chain product surface killing system | |
| CN218793169U (en) | Nano-wave high-voltage pulse plasma disinfection and sterilization device | |
| CN113423167B (en) | Device and method for continuously generating large-volume plasma in liquid phase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |