CN109600901A - A method of reducing discharge breakdown voltage in liquid medium - Google Patents
A method of reducing discharge breakdown voltage in liquid medium Download PDFInfo
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- CN109600901A CN109600901A CN201811348644.4A CN201811348644A CN109600901A CN 109600901 A CN109600901 A CN 109600901A CN 201811348644 A CN201811348644 A CN 201811348644A CN 109600901 A CN109600901 A CN 109600901A
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- electrodes
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- electric discharge
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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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- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The technical field of plasma that the invention belongs to discharge in liquid medium, and disclose a kind of method for reducing discharge breakdown voltage in liquid medium.This method include the following steps: S1 by two electrodes it is staggered relatively electric discharge liquid in, set initial distance between the two, then respectively clamp two electrodes, and make at least one electrode have around its own bite movement freedom degree；S2 applies high voltage between two electrodes, and the two attracts each other so that the bottom end of two electrodes moves closer to, and shortens distance between the two with this, reduces the breakdown voltage between two electrodes；S3 is gradually increased the high voltage of application until discharging between two electrodes, and discharge voltage punctures electric discharge liquid between the two, and after electric discharge is lighted, two electrodes restore to initial distance, so far complete breakdown process.Through the invention, breakdown voltage in liquid medium is reduced, the ablation of electrode is avoided, improves the utilization rate of energy, reduce the difficulty of discharge in water.
Description
Technical field
The technical field of plasma that the invention belongs to discharge in liquid medium is situated between more particularly, to one kind in liquid
The method of discharge breakdown voltage is reduced in matter.
Background technique
In recent years, the research and application of discharge plasma have obtained extensive concern both at home and abroad in liquid, put in liquid
Electricity all has great importance in hydrogen from ethanol reforming, sewage treatment, sterilizing.At present to the application study of discharge in water
In, the electrode of equipment therefor either needle-plate, needle-needle or board-to-board, the spacing of electrode is all definite value.And discharge in water
Characteristic is that breakdown voltage is very high, and after once discharging and lighting, maintain the voltage of electric discharge then relatively low.If giving discharging gap
Sufficiently high voltage is loaded, although electric discharge can be made to be easy to generate, the negative issue generated is also very much, including higher electricity
Pressure grade volume, the cost of power supply are caused to increase, while puncture after if voltage cannot be adjusted back in time, it is stable after put
Electric current is relatively large, and this aspect will cause the ablation of electrode to influence service life and the safety of electric discharge device, another party
Face also increases the load and energy consumption of power supply, while being also unfavorable for regulating and controlling the operating condition of electric discharge device, and if
The output voltage of power supply is not high enough, then can not generate electric discharge at all.
Currently, generating in discharge process in liquid medium, electrode is clamped to be fixed, and does not have freedom degree, is giving two
When electrode applies voltage, (usually when two electrodes are at 1 millimeter in such as deionized water when the voltage only applied reaches sufficiently high
When, breakdown voltage is up to 25KV or more), the liquid medium between electrode could be breakdown, therefore, the requirement pole to experimental facilities
It is high, it is difficult to implement.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, electric discharge is reduced in liquid medium the present invention provides a kind of
The method of breakdown voltage, under conditions of not changing discharging gap size, electrode structure and discharge medium, by having electrode
There is certain freedom degree, so that distance between the two can be adjusted by electrostatic force, being powered in electrode, latter two is electric
Pole, which attracts each other, shortens distance between the two, with this reduce in liquid medium discharge breakdown voltage, when discharging gap is hit
After wearing, there is current lead-through between two electrodes, two interelectrode electrostatic attractions disappear at this time, and two electrodes return to initial position and keep away
Exempt from electric discharge excessively acutely cause electrode ablation and electric discharge it is out of control, the breakdown voltage of discharge in water is thus greatly lowered, mentions
The utilization rate of high-energy reduces the difficulty of discharge in water.
To achieve the above object, it is proposed, according to the invention, provide a kind of side for reducing discharge breakdown voltage in liquid medium
Method, which is characterized in that this method includes the following steps:
S1 is staggered relatively in electric discharge liquid by two electrodes, sets initial distance between the two, then clamps respectively
Described two electrodes, and the freedom degree for the bite movement that at least one electrode is had around its own；
S2 applies high voltage between described two electrodes, and the two attracts each other so that the bottom end of two electrodes is gradually leaned on
Closely, the distance between two described electrodes are shortened with this, reduces the breakdown voltage between two electrodes；
S3 is gradually increased the high voltage of application until discharging between two electrodes, and discharge voltage punctures two
Electric discharge liquid between person, after electric discharge is lighted, two electrodes restore to initial distance, so far complete breakdown process.
It is further preferred that in step s 2, the power supply for applying high voltage preferably uses DC power supply, pulse electricity
Source, AC power source, radio-frequency power supply, microwave power supply.
It is further preferred that in step sl, the electric discharge liquid preferably uses dielectric liquid.
It is further preferred that in step sl, the electric discharge liquid preferably uses dehydrated alcohol, organic solvent, distilled water
Or deionized water.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1, the present invention has certain freedom degree for what two electrodes were arranged, so that after applying high voltage in electrode mutually
Attract, shortens the distance between electrode, breakdown voltage is reduced with this, meanwhile, after electric discharge is lighted, electrode energy automatic homing restores
To initial distance, avoids the excessively violent guiding discharge of electric discharge out of control and electrode erosion, improve safety, prolong the service life；
2, the present invention is by applying high voltage on two electrodes, so that the continuous deposited charge in electrode bottom end.Due to two
Electrode is cathode and anode respectively, therefore the charge accumulated on two electrodes is respectively negative electrical charge and positive charge, and polarity is different
Electrostatic attraction can be formed under the action of electrostatic field between charge, it is close to each other so as to cause cathode and anode, and when two electricity
The distance of pole will puncture liquid medium when close enough under the action of outer making alive and discharge, after discharging,
Conductive plasma channel is formd between two electrodes, therefore is also formed conduction electric current and flows through electrode, then on electrode
The charge of accumulation disappears, and electrostatic attraction also disappears therewith, and the electrode of two effects that lose its reliss is separated from each other, electrode gap
Increase, still, after being lighted due to electric discharge, the required voltage that continues to discharge is relatively low, therefore increases in electrode gap
During discharge and can't extinguish.If interelectrode initial spacing is smaller, electric discharge can be after when electrode returns to initial position
It is continuous to carry out, until applied voltage disappears., whereas if interelectrode initial spacing is larger, then when electrode returns to initial position outside
Making alive is not enough to that electric discharge is maintained to continue, and electric discharge can extinguish at this time.
Detailed description of the invention
Fig. 1 is the structural schematic diagram to discharge in middle liquid medium constructed by preferred embodiment according to the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Preferred embodiment according to the invention, builds the device to discharge in liquid medium, and Fig. 1 is according to the invention excellent
Select the structural schematic diagram to discharge in middle liquid medium constructed by embodiment, which includes with flowering structure: high voltage power supply can live
The dynamic electrode that can bear high pressure, discharge in water container, float electrode retaining collar, earth polar, oscillograph.
High voltage power supply can be DC power supply, the pulse power, AC power source, radio-frequency power supply, microwave power supply；Electrode can be used not
The metal needle for the good conductivities such as steel needle, tungsten needle of becoming rusty；Applying high voltage on the electrode is the voltage greater than 220V, in different Jie
Discharge voltage differs greatly under the conditions of matter, for example when liquid is deionized water, breakdown voltage is up to 30kV or more, and
The minimum reachable 15kV of its breakdown voltage when liquid is dehydrated alcohol.
Discharge in water container is using quartz container or other do not react with liquid and insulating properties and high pressure resistant height
The good container of warm nature；The liquid that discharges can be the non-conductive liquids such as dehydrated alcohol, organic solvent, distilled water, deionized water；It is living
Moving electrode retaining collar using sandwich rubber make, can also using other flexible substances or other can enable electrode
Movable fixed form, both can two electrodes it is all movable, can also be movable with only one electrode；Method provided by the invention
It is not only suitable for needle-needle-discharging, is also applied for needle-plate electric discharge and other interelectrode electric discharges.
When electrode does not pressurize, the two poles of the earth keep certain spacing, are powered when to high-field electrode, are gradually promoting voltage and are not having
Before having disruptive discharge, accumulate electrostatic charge in two float electrodes, electrode attract each other under the action of electrostatic force it is close, to make
Discharging gap reduces, and achievees the effect that reduce breakdown voltage, and after electric discharge occurs, the stored charge on two electrodes disappears, electricity
Pole loses the effect of electrostatic attraction, can return to initial spacing again under the action of gravity or screen resilience, and discharging will not
It interrupts.
Effect of the invention is further illustrated below in conjunction with specific embodiments.
The high-voltage ac power of 40KHZ is chosen, discharge mode is liquid phase needle-needle-discharging, and high-field electrode is stainless pin, is put
Capacitor uses quartz container, and stainless pin is fixed on container by elastic sponge rubber lantern ring, adjusts the thickness of sponge
Making electrode in a certain range and be can be movable, and liquid uses distilled water.
Wherein, the initial spacing between stainless pin, that is, electrode is 5mm, after energization, suction of two stainless pins in electrostatic force
Draw lower close, until distance 1mm or so, electric discharge is generated when voltage is 15KV, after electric discharge, two needles, which lose its reliss, to be restored to just
Begin distance 5mm, but electric discharge still carries out.
Comparative experiments: power supply, electrode material, container, the discharge mode of selection are constant, and the fixed form of electrode is changed
Fixed for non-movable formula, i.e., the distance between two electrodes be can not be changed.First group of electrode spacing is 5mm, voltage
It is added to 30KV, does not generate electric discharge；Second group of electrode spacing is 1mm, is pressurized to 25KV, generates electric discharge.
From comparative experiments as can be seen that when two electrodes have certain freedom degree, after applying voltage on two electrodes,
It attracts each other between electrode, shortens the distance between two electrodes, considerably reduce the breakdown voltage of discharge in water, so that
Breakdown voltage is reduced to 15KV in 30KV or more, and in this process without influencing discharge mode, electric discharge is more easier, and not
The spacing for keeping electric discharge to occur is influenced, electric discharge still can be easily realized in the biggish situation of electrode spacing.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (4)
1. a kind of method for reducing discharge breakdown voltage in liquid medium, which is characterized in that this method includes the following steps:
S1 by two electrodes it is staggered relatively electric discharge liquid in, set initial distance between the two, then respectively clamping described in
Two electrodes, and the freedom degree for the bite movement that at least one electrode is had around its own；
S2 applies high voltage between described two electrodes, and the two attracts each other so that the bottom end of two electrodes moves closer to,
Shorten the distance between two described electrodes with this, reduces the breakdown voltage between two electrodes；
S3 is gradually increased the high voltage of application until discharging between two electrodes, and discharge voltage punctures the two
Between electric discharge liquid, electric discharge light after, two electrodes restore to the initial distance, so far complete breakdown process.
2. a kind of method for reducing discharge breakdown voltage in liquid medium as described in claim 1, which is characterized in that in step
In rapid S2, the power supply for applying high voltage preferably uses DC power supply, the pulse power, AC power source, radio-frequency power supply, microwave electricity
Source.
3. a kind of method for reducing discharge breakdown voltage in liquid medium as claimed in claim 1 or 2, which is characterized in that
In step sl, the electric discharge liquid preferably uses dielectric liquid.
4. a kind of method for reducing discharge breakdown voltage in liquid medium as described in any one of claims 1-3, feature
It is, in step sl, the electric discharge liquid preferably uses dehydrated alcohol, organic solvent, distilled water or deionized water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348644.4A CN109600901B (en) | 2018-11-13 | 2018-11-13 | Method for reducing discharge breakdown voltage in liquid medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348644.4A CN109600901B (en) | 2018-11-13 | 2018-11-13 | Method for reducing discharge breakdown voltage in liquid medium |
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| Publication Number | Publication Date |
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| CN109600901A true CN109600901A (en) | 2019-04-09 |
| CN109600901B CN109600901B (en) | 2020-06-30 |
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| CN201811348644.4A Expired - Fee Related CN109600901B (en) | 2018-11-13 | 2018-11-13 | Method for reducing discharge breakdown voltage in liquid medium |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100927426B1 (en) * | 2009-03-06 | 2009-11-19 | 주식회사 비와이 | Plasma treatment device and method thereof, ballast water treatment device |
| JP4409827B2 (en) * | 2002-12-25 | 2010-02-03 | 亮拿 佐藤 | Arc generator, arc water production apparatus, arc generation method, arc water production method, and arc treatment method |
| CN205263254U (en) * | 2015-12-31 | 2016-05-25 | 武汉大学 | Liquid dielectric breakdown voltage test device |
| CN105869485A (en) * | 2016-05-26 | 2016-08-17 | 山西大学 | Variable-gas-pressure high-pressure discharge system for experiments |
| CN205616578U (en) * | 2016-04-18 | 2016-10-05 | 新特能源股份有限公司 | Discharge electrode |
-
2018
- 2018-11-13 CN CN201811348644.4A patent/CN109600901B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4409827B2 (en) * | 2002-12-25 | 2010-02-03 | 亮拿 佐藤 | Arc generator, arc water production apparatus, arc generation method, arc water production method, and arc treatment method |
| KR100927426B1 (en) * | 2009-03-06 | 2009-11-19 | 주식회사 비와이 | Plasma treatment device and method thereof, ballast water treatment device |
| CN205263254U (en) * | 2015-12-31 | 2016-05-25 | 武汉大学 | Liquid dielectric breakdown voltage test device |
| CN205616578U (en) * | 2016-04-18 | 2016-10-05 | 新特能源股份有限公司 | Discharge electrode |
| CN105869485A (en) * | 2016-05-26 | 2016-08-17 | 山西大学 | Variable-gas-pressure high-pressure discharge system for experiments |
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| CN109600901B (en) | 2020-06-30 |
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