CN113099599B - Sliding arc discharge reaction device and sterilization method - Google Patents
Sliding arc discharge reaction device and sterilization method Download PDFInfo
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- CN113099599B CN113099599B CN202110463480.5A CN202110463480A CN113099599B CN 113099599 B CN113099599 B CN 113099599B CN 202110463480 A CN202110463480 A CN 202110463480A CN 113099599 B CN113099599 B CN 113099599B
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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
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/14—Plasma, i.e. ionised gases
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/22—Ionisation
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/12—Apparatus for isolating biocidal substances from the environment
- A61L2202/121—Sealings, e.g. doors, covers, valves, sluices
Abstract
The invention relates to a sliding arc discharge reaction device, which comprises a power supply module, an airflow generator and a discharge module, wherein the airflow generator is connected with the power supply module; the airflow generator comprises a shell and a fan in the shell, wherein the shell comprises an air inlet and an air outlet; the discharge module comprises an insulating high-temperature-resistant tube, a first electrode and a second electrode; the first electrode and the second electrode are oppositely arranged in the insulating high-temperature resistant tube; the power supply module outputs direct current; the high-voltage end of the power supply module is connected with the first electrode, and the low-voltage end of the power supply module is connected with the second electrode; the electrode is columnar, and the central line of the electrode is vertical to the direction of the airflow; the electrode distance is adjustable within the range of 5mm-70 mm; when the plasma torch is in work, airflow blows out sliding arc discharge plasma through the electrode area. The invention also relates to a sterilization method. The invention has simple structure, does not need additional cooling device, effectively reduces the temperature of the sliding arc discharge plasma, can ionize air molecules in the air environment, generates a large amount of active free radicals, effectively kills bacteria and viruses, and can be applied to disinfection and sterilization of the space environment.
Description
Technical Field
The invention belongs to the technical field of sterilization and disinfection of air and environment, and particularly relates to a sliding arc discharge reaction device and a sterilization method.
Background
Atmospheric plasma discharge is a phenomenon in which a relatively high electric field is generated in an atmospheric environment to break down air to form discharge ionization. The technology needs high enough voltage to generate high strength electric field, and simultaneously, a large amount of heat energy and electromagnetic radiation can be released in the plasma discharge process, and the requirements on the high temperature resistance, the high voltage resistance and the environment shielding of the reactor are high. The atmospheric plasma discharge mode has multiple modes such as dielectric barrier discharge, corona discharge, plasma torch, sliding arc and the like, each mode has the characteristics of the mode, different product series are derived aiming at different application scenes and product attributes, but the problems of small application processing area, low efficiency and non-durable discharge exist, the equipment size is large, the integration level of a power supply and a reactor is not enough, and the marketization application degree is low. For example, ceramic insulating medium is added in a reactor in the middle of dielectric barrier discharge, and insulation is needed to be made outside the reactor due to the fact that the required voltage is high; the plasma torch has higher discharge temperature and smaller processing area, and is difficult to realize industrialized application; the energy of corona discharge is low, and the treatment effect is not obvious; the industrial sliding arc discharge is commonly used for treating waste water and waste gas by the high-temperature characteristic, the discharge power is higher, the electrode structure is complex, and the discharge stability needs to be further solved.
Many plasma discharge power supplies and reactors often lead to untimely heat diffusion and high-temperature melting due to poor matching, so that the discharge time is short and potential safety hazards exist.
Disclosure of Invention
In order to solve the problems, the invention provides a sliding arc discharge reaction device and a sterilization method, the industrial sliding arc discharge technology is further upgraded and reformed, the original electrode configuration is changed, and a proper power supply driving system is matched, so that a device which can carry out high-efficiency ionization on air and can be used for sterilizing the surfaces of objects and gases in the environment and life is formed, and the device is a green and environment-friendly cleaning and sterilizing method. The invention solves the problem of matching the power supply and the electrode of the sliding arc discharge, effectively reduces the temperature of the sliding arc discharge plasma, and is creative work of the invention.
The invention has simple structure, effectively reduces the temperature of the sliding arc discharge plasma, can ionize air molecules in the air environment, generates a large amount of active free radicals, effectively kills bacteria and viruses, and can be applied to disinfection and sterilization of the space environment.
The purpose of the invention is realized as follows:
a sliding arc discharge reaction device comprises a power supply module, an airflow generator and a discharge module; the airflow generator comprises a shell and a fan arranged in the shell, and the shell comprises an air inlet and an air outlet;
the discharge module comprises an insulating high-temperature-resistant tube, a first electrode and a second electrode; the first electrode and the second electrode are oppositely arranged in the insulating high-temperature-resistant tube;
the power module outputs direct current and comprises a circuit controller and a transformer, the rated voltage of the power module is 10kV-40kV, the rated power is 1000W-1500W, the controller controls the discharge power to be lower than 1000W, and the maximum current is 100 mA; the high-voltage end of the power supply module is connected with the first electrode, and the low-voltage end of the power supply module is connected with the second electrode;
the electrode is columnar, and the center line of the electrode is vertical to the direction of the airflow; the electrode distance is adjustable within the range of 5mm-70 mm;
when the plasma torch is in work, airflow blows out sliding arc discharge plasma through the electrode area.
The relative arrangement here means that the connecting line of the discharge ends of the two electrodes is perpendicular to the central line of the insulating high-temperature resistant tube.
The sliding arc discharge reaction device generates plasma sliding arcs, and the high-temperature sliding arcs can excite free radicals in the air. Through the work of this generating device, continuously produce a large amount of free radicals, and the matching design of power and electrode, make the device power low, the energy consumption is little, be 220V domestic electricity through external voltage, or, be 24V's car power supply battery, or, the great (greater than 2A) output voltage of electric current is the precious power supply that charges of 5V, although electric arc central temperature is higher, nevertheless through the air current flow, the temperature of slip arc discharge plasma has effectively been reduced in high temperature resistant insulating tube and electrode and electrical power generating system's design, thereby provide powerful guarantee for subsequent sterilization and the sterilization outside the area.
At present, the voltage of the sliding arc discharge plasma is as high as 100kV to 200kV, the pressure is high, and the temperature is high; the sliding arc center temperature even reaches 6000 ℃. Through research, the direct-current power supply with rated voltage of 10kV to 40kV and rated power of 1000W to 1500W is controlled by a transformer, so that the direct-current power supply is easy to generate sliding arc, the central temperature is lower than 2000 ℃, the central temperature is far lower than the central temperature of the conventional sliding arc, the application of sterilization in life is facilitated, in addition, the power supply is low in cost, and the effect of generating the sliding arc is good.
In addition, the insulating high-temperature-resistant tube can resist the high temperature of more than 2000 ℃ at the center of the sliding arc, so that the ionization can be stably carried out for a long time, and meanwhile, the fan can cool the insulating high-temperature-resistant tube, the electrode and the high-temperature plasma in time while circulating gas.
The electrode distance is 5mm-70mm, the length of the discharge arc is changed along with the size of the airflow, the arc length is generally 1cm-5cm, the longer the arc, the higher the discharge power, and the length of the discharge arc is not changed along with the change of the discharge distance. However, the arcing distance is closely related to the electrode distance, the discharge distance is higher than 7cm, the arcing is difficult to occur during the discharge, and the discharge cannot be generated.
In a preferred embodiment of the present invention, the output of the power module is a pulse direct current, and the pulse frequency is 0 to 0.1 kHz.
The pulse drive can reduce the discharge time, is beneficial to heat diffusion and generates fewer byproducts.
According to a preferred embodiment of the invention, the insulating high-temperature resistant tube is a ceramic tube or a quartz tube, the diameter of the insulating high-temperature resistant tube is 10mm-100mm, and the distance between the electrode position and the two ends of the high-temperature resistant tube is larger than 1 cm.
The ceramic or quartz is a good insulating high-temperature resistant material, the diameter is controlled to be 10mm-100mm, the requirements of various occasions can be met, the distance between the position of the electrode and the two ends of the high-temperature resistant tube is more than 1cm, the heat can be fully diffused, and the discharge safety is ensured.
In a preferred embodiment of the invention, the electrode material is copper, beryllium, nickel, stainless steel or tungsten, and the electrode is in the shape of a cylinder with the diameter of 1mm-5 mm.
The beryllium or tungsten electrode used in this patent has certain advantages over other metal electrodes in increasing the concentration of active components and reducing the generation of harmful components. Meanwhile, the electrode material has good conductivity, high temperature resistance and small wind resistance, and is not easy to corrode, and the diameter of the columnar body is 1-5 mm.
In a preferred embodiment of the present invention, the sliding arc discharge reaction apparatus further includes a box body, and the power module, the airflow generator, and the high temperature resistant insulating tube are located in the box body; and the power module and the discharge electrode are insulated and isolated.
The integrated design is beneficial to the portability of products, and the insulation and separation between the power module and the discharge electrode avoid the self-discharge formed by the close conductive distance between the electrode and the periphery.
In a preferred embodiment of the present invention, the box body further has a sealed space, the sealed space is provided with an air outlet, and the high temperature resistant insulating tube is communicated with the sealed space.
The sealed space enables the free radicals to be gathered in the space so as to easily form the plasma sterilizing gas, and the plasma sterilizing gas is discharged through the gas outlet.
In a preferred embodiment of the present invention, the high temperature resistant insulating pipe is communicated with the sealed space through an elbow joint, and the high temperature resistant insulating pipe and the elbow joint form a flow channel.
The bend design also has the purpose of realizing effective electromagnetic shielding, and simultaneously can prevent the light generated by discharging from interfering and damaging the outside.
In a preferred embodiment of the present invention, a plurality of sound insulation nets are disposed in the sealed space and/or the flow passage.
Through setting up sound-proof material board to reduce the noise that discharges to produce.
In a preferred embodiment of the present invention, the first electrode is disposed close to the power module, and the second electrode is disposed far from the power module.
The connection method can reduce the length of the high-voltage wire as much as possible, prevent unstable discharge and improve the operation safety.
The invention also relates to a sterilization method using the device, which comprises the steps of placing the reaction device in a closed space to be sterilized; or the reaction device is communicated with the closed space to be sterilized through the air outlet or is communicated into the water container to prepare the sterilizing water; or the reaction device is placed in a channel of a fresh air system; the reaction apparatus was discharged for at least 30 seconds.
The high-temperature characteristic of sliding arc discharge can greatly improve the energy of free electrons, can reach more than 10eV, is far higher than other atmospheric plasma discharge modes, can efficiently excite, decompose or ionize various component molecules in the air, and simultaneously, an airflow circulating system can lead out ionized active particles in time to achieve higher sterilization effect. The sustained discharge ensures sufficient active particle generation, requiring a longer duration for a larger space. The discharge can be realized within 2min-5min in a space of 27L, and the sterilization and disinfection efficiency can reach the sterilization rate of 4-6 log values; the sterilizing gas can reach 4-6 log sterilizing rate in a sealed space of 500-1000L within 10-30 min; the plasma gas can reach the sterilization rate of 1-2 log values within 60-90 min in a space of 30000L.
The invention has at least the following beneficial effects:
1) the invention further upgrades and reforms the industrial sliding arc discharge technology, changes the original electrode configuration and matches with a proper power supply driving system to form a device which can carry out high-efficiency ionization on air and can be used for sterilizing the surfaces of objects and gases in the environment and life, and the device is a green and environment-friendly cleaning and disinfecting method. The invention solves the problem of matching the power supply and the electrode of the sliding arc discharge and effectively reduces the temperature of the sliding arc discharge plasma.
2) The matching design of the power supply and the electrode ensures that the device has low power and low energy consumption, and the external voltage is 220V household power, or is a 24V automobile power supply battery, or is a charger power supply with larger current (more than 2A) and 5V output voltage, although the central temperature of the electric arc is higher, the temperature of the sliding arc discharge plasma is effectively reduced through the design of the fan, the high-temperature resistant insulating tube, the electrode and the power supply system, thereby providing powerful guarantee for subsequent sterilization and sterilization outside the area.
3) The invention adopts the transformer to control the DC power supply with the rated voltage of 10kV to 40kV and the rated power of 1000W to 1500W, is easy to generate the sliding arc, has the central temperature of less than 2000 ℃, is far lower than the central temperature of the conventional sliding arc, is beneficial to the application of sterilization in life, and has low cost and good effect of generating the sliding arc.
4) The insulating high-temperature-resistant pipe can resist the high temperature of 2000 ℃ at the center of the sliding arc, is favorable for long-term stable ionization work, and can cool the insulating high-temperature-resistant pipe, the electrode and the high-temperature plasma blown out in time while circulating gas by the fan.
5) The pulse drive can reduce the discharge time, is beneficial to heat diffusion and generates fewer byproducts.
6) The ceramic or quartz is a good insulating high-temperature resistant material, the diameter is controlled to be 10mm-100mm, the requirements of various occasions can be met, the distance between the position of the electrode and the two ends of the high-temperature resistant tube is more than 1cm, the heat can be fully diffused, and the discharge safety is ensured.
7) The beryllium or tungsten has good conductivity, high temperature resistance and small wind resistance, is not easy to corrode, and has a diameter of 1mm-5 mm.
8) The integrated design is beneficial to the portability of products, and the insulation and separation between the power module and the discharge electrode avoid the self-discharge formed by the close conductive distance between the electrode and the periphery.
9) The sealed space allows radicals to accumulate in the space to easily form a plasma sterilizing gas, which is discharged through the gas outlet.
10) The bend design also has the purpose of realizing effective electromagnetic shielding, and simultaneously can prevent the light generated by discharging from interfering and damaging the outside.
11) Through setting up sound-proof material board to reduce the noise that discharges to produce.
12) The invention reduces the length of the high-voltage wire, prevents unstable discharge and improves the operation safety.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
fig. 2 is an enlarged view of the electrode region structure of the present invention.
In the figure, 1-transformer; 2-a circuit controller; 3-emergency stop button; 4-an activation key; 5-power adjusting knob; 6-stop key; 7-an insulating plate; 8-air outlet; 9-sound insulation net; 10-a fan; 11-a ceramic tube; 12-a first electrode; 13-an insulating barrier plate; 14-a box body; 15-second electrode.
Detailed Description
The invention will be further explained with reference to the drawings.
Example one
FIGS. 1-2 show a schematic view of one embodiment of the apparatus of the present invention;
a sliding arc discharge reaction device comprises a power supply module, an airflow generator and a discharge module; the airflow generator comprises a shell and a fan 10 arranged in the shell, wherein the shell comprises an air inlet and an air outlet;
the discharge module comprises an insulating high-temperature-resistant tube 11, a first electrode 12 and a second electrode 15; the first electrode 12 and the second electrode 15 are oppositely arranged in the insulating high-temperature resistant tube 11;
the power module outputs direct current and comprises a circuit controller 2 and a transformer 1, the rated voltage of the power module is 10kV-40kV, the rated power is 1000W-1500W, the circuit controller 2 controls the discharge power to be lower than 1000W, and the maximum current is 100 mA; the high-voltage end of the power supply module is connected with the first electrode 12, and the low-voltage end of the power supply module is connected with the second electrode 15;
the electrode is columnar, and the center line of the electrode is vertical to the direction of the airflow; the electrode distance is adjustable within the range of 5mm-70 mm;
when the plasma torch is in work, airflow blows out sliding arc discharge plasma through the electrode area.
Specifically, the fan arranged in the shell has variable speed regulation, and the wind speed is 0.5-5.0 m/s; the shielding layer is arranged on the outer side of the fan arranged in the shell and is more than 5cm away from the high-voltage output end of the discharge module;
the first electrode and the second electrode of the discharge module are insulated from the cavity and the periphery; the first electrode and the second electrode of the discharge module are connected with the output voltage in a nut connection mode;
specifically, the electrode may be rod-shaped or square, and has a certain consumption in the process of discharge ionization, and needs to be replaced periodically.
Specifically, the electrode is embedded in the high-temperature resistant insulating tube, the joint of the electrode and the power supply is connected by a screw or a clamp, and the electrode cannot be connected by soldering and is easy to melt.
When the sliding arc discharges, the temperature range of the discharge electrode is 500-1800 ℃, the temperature is higher, but the high temperature area is only limited by the contact part of the electrode and the arc, the high temperature can be diffused in time under the gas flow, and can not be accumulated, so the change amplitude of the environmental temperature caused by the ionized gas can not exceed 5 ℃, and the environment can not be greatly influenced.
Specifically, in order to further facilitate heat diffusion, fewer byproducts are generated, and the output of the power supply module is pulse direct current with the pulse frequency of 0-1.0 kHz. Preferably 50Hz or 100 Hz.
Preferably, the insulating high-temperature resistant tube is a ceramic tube or a quartz tube, the diameter of the insulating high-temperature resistant tube is 10mm-100mm, and the distance between the electrode position and the two ends of the high-temperature resistant tube is larger than 1 cm.
Specifically, the electrode material is selected from copper, beryllium, nickel, stainless steel or tungsten, and the electrode is preferably in the shape of a cylinder with the diameter of 1mm-5 mm.
Preferably, the electrode material is beryllium or tungsten;
preferably, the electrode distance is between 2 and 7cm, the length of the discharge arc varies with the size of the gas flow, generally between 1cm and 5cm, the longer the arc, the higher the discharge power, and the length of the discharge arc does not vary with the discharge distance. However, the arcing distance is closely related to the electrode distance, the discharge distance is higher than 7cm, the arcing is difficult to occur during the discharge, and the discharge cannot be generated.
Preferably, the device also comprises a box body 14, wherein the high-temperature resistant insulating tube 11 of the power supply module and the airflow generator is positioned in the box body 14; and the power module and the discharge electrode are insulated and isolated.
Specifically, the box body is made of a metal plate and is a sealed cavity, so that the power supply module and the air flow channel are mutually independent closed spaces, and the power supply module cannot be corroded by discharge plasma; the thickness of the metal plate is 1-2mm, so that the ionizing radiation and electronic interference generated when the power supply module and the discharge reactor work can be effectively shielded. Preferably, the metal plate thickness should be greater than 1 mm.
In particular, the box body needs to be connected with a ground wire, and can be used for shielding electromagnetic radiation and using electricity safely.
Preferably, the periphery of the outer side of the electrode is isolated by an insulating medium, and the length of the insulating plate is more than 5cm, so that the self-discharge formed by the electrode and the surrounding conducting distance is avoided. The metal cavity should be well grounded, and the operation safety is guaranteed.
Specifically, the box body 14 further has a sealed space provided with the air outlet 8, and the high-temperature-resistant insulating tube communicates with the sealed space.
Preferably, the high-temperature-resistant insulating pipe is communicated with the sealing space through an elbow joint, and the high-temperature-resistant insulating pipe and the elbow joint form a flow channel.
The air circulation device is composed of a fan 10, a ceramic pipeline and a communicating pipeline, a bend joint is added at the outlet of the ceramic pipe to conduct air flow to a sealed space, and two air outlets 8 are reserved to facilitate air flow guiding out.
Preferably, in order to reduce the noise generated by the discharge, a plurality of sound insulation nets 9 are arranged in the sealed space and/or the flow channel.
Specifically, a plurality of layers of corrosion-resistant sound insulation material plates such as asbestos fibers or glass fibers are placed in the sealed cavity to reduce noise generated by discharge.
The interior of the ceramic tube is provided with a plurality of layers of sound insulation nets 9, the sound insulation nets 9 need to be high temperature resistant, and the distance from the discharge is more than 10 cm.
Specifically, the first electrode is disposed close to the power supply module, and the second electrode is disposed far from the power supply module.
The connection method can reduce the length of the high-voltage wire as much as possible, prevent unstable discharge and improve the operation safety.
Specifically, the circuit controller 2 is provided with an emergency stop button 3 for adjusting the discharge power, a start key 4, a power adjustment knob 5, a stop key 6, and corresponding start and stop indicator lamps.
The periphery of the discharge electrode should have good insulation, an insulation device can be additionally constructed, the insulation device must resist high temperature and can be made of high-temperature-resistant insulation materials such as ceramics, quartz, polytetrafluoroethylene, epoxy resin plates and the like, and the length of the insulation device should be 5cm and should be tightly attached to the surface of the sliding arc discharge reactor.
The sliding arc discharge reactor is built by adopting the atmospheric plasma discharge technology, and the positions and the structures of the ventilation device, the insulation device, the electrode structure and the power supply are matched, so that the integrated design with stable discharge, lasting work and safe operation is achieved.
Example two:
the invention also relates to a sterilization method, which comprises the reaction device of the embodiment, wherein the reaction device is placed in a closed space to be sterilized; or the reaction device is communicated with the closed space to be sterilized through the air outlet or is communicated into the water container to prepare the sterilizing water; or the reaction device is placed in a channel of a fresh air system; the reaction apparatus was discharged for at least 30 seconds.
Example three:
the invention also relates to a sterilization device which can realize the industrialized application of surface sterilization of various articles, and through the test of a third party certification authority, the plasma sterilization prototype machine based on the invention has better sterilization effect, and the sterilization rate of bacteria represented by escherichia coli ATCC25922, staphylococcus aureus ATCC6538, candida albicans ATCC10231 and aspergillus niger ATCC16404 can reach 99.999% after discharging for 30 minutes in 1 cubic space, thereby meeting the sterilization requirement of the sterilization technical specification (2002 edition) 2.1.5.1.5.
Meanwhile, the plasma sterilization disinfection prototype provided by the invention can discharge 45 minutes or 90 minutes in a space of 20 cubic meters, and the virus killing rate of avian influenza virus H5N1 Vero-E6 cells, swine influenza virus H3N3 Vero-E6 cells and African swine fever virus ASFVVero-E6 cells as representatives can reach 99.99%. In addition, the sterilization rate of staphylococcus albus, escherichia coli, candida albicans, bacillus subtilis and aspergillus niger reaches 99.99%.
While the foregoing is directed to the preferred embodiment of the present invention, the scope of the present invention is not limited thereto, and it will be appreciated by those skilled in the art that changes and modifications may 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, and that such changes and modifications are to be considered as within the scope of the invention.
Claims (6)
1. A sliding arc discharge reaction device is characterized by comprising a power supply module, an airflow generator and a discharge module;
the airflow generator comprises a shell and a fan arranged in the shell, and the shell comprises an air inlet and an air outlet;
the discharge module comprises an insulating high-temperature-resistant tube, a first electrode and a second electrode; the first electrode and the second electrode are oppositely arranged in the insulating high-temperature-resistant tube; one end of the insulating high-temperature resistant pipe is connected with the air outlet;
the power module outputs direct current and comprises a circuit controller and a transformer, wherein the input voltage is 5V-220V, the input current is more than 2.0A, the transformer is adopted to control a direct current power supply with rated voltage of 10kV-40kV and rated power of 1000W-1500W, the output voltage of the power module is 10kV-40kV and rated power of 1000W-1500W, the controller controls the discharge power to be lower than 1000W, and the maximum current is 100 mA; the high-voltage end of the power supply module is connected with the first electrode, and the low-voltage end of the power supply module is connected with the second electrode; the electrode is columnar, and the center line of the electrode is vertical to the direction of the airflow; the electrode distance is adjustable within the range of 5mm-70 mm; the output of the power supply module is pulse direct current, and the pulse frequency is 0-1.0 kHz;
when the electrode works, airflow blows out sliding arc discharge plasma through the electrode area;
the sliding arc discharge reaction device also comprises a box body, wherein the power supply module, the airflow generator and the high-temperature-resistant insulating tube are positioned in the box body; the power module and the discharge electrode are insulated and isolated;
the box body is also provided with a sealed space, the sealed space is provided with an air outlet, and the high-temperature-resistant insulating pipe is communicated with the sealed space;
the high-temperature-resistant insulating pipe is communicated with the sealing space through the elbow joint, and the high-temperature-resistant insulating pipe and the elbow joint form an airflow channel.
2. The sliding arc discharge reactor according to claim 1, wherein the insulating refractory tube is a ceramic tube or a quartz tube with a diameter of 10mm to 100mm, and the electrode is positioned at a distance of more than 1cm from both ends of the refractory tube.
3. The sliding arc discharge reactor apparatus of claim 1 wherein said electrode material is selected from the group consisting of copper, beryllium, nickel, stainless steel, and tungsten, and wherein said electrode is in the form of a cylinder having a diameter of 1mm to 5 mm.
4. A sliding arc discharge reactor apparatus as claimed in claim 1, wherein a plurality of sound-insulating meshes are provided in said sealed space and/or said gas flow path.
5. The sliding arc discharge reactor apparatus of claim 1 wherein the first electrode is disposed proximate to the power module and the second electrode is disposed distal to the power module.
6. A method for sterilization using the apparatus of any one of claims 1 to 5, wherein the reaction apparatus is placed in a closed space to be sterilized; or the reaction device is communicated with the closed space to be sterilized through the air outlet or is communicated into the water container to prepare the sterilizing water; or the reaction device is placed in a channel of a fresh air system; the reaction apparatus was discharged for at least 30 seconds.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| PCT/CN2021/099594 WO2022227236A1 (en) | 2021-04-26 | 2021-06-11 | Gliding arc discharge reaction device and sterilization method |
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| CN113099599A (en) | 2021-07-09 |
| WO2022227236A1 (en) | 2022-11-03 |
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Application publication date: 20210709 Assignee: Beijing Guoxuan Youpin International Cold Chain Logistics Technology Co.,Ltd. Assignor: BEIJING University OF AGRICULTURE Contract record no.: X2023110000011 Denomination of invention: A sliding arc discharge reaction device and sterilization method Granted publication date: 20220426 License type: Exclusive License Record date: 20230129 |