CN207091049U - A kind of liquid phase low-temperature plasma generator - Google Patents
A kind of liquid phase low-temperature plasma generator Download PDFInfo
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- CN207091049U CN207091049U CN201720697916.6U CN201720697916U CN207091049U CN 207091049 U CN207091049 U CN 207091049U CN 201720697916 U CN201720697916 U CN 201720697916U CN 207091049 U CN207091049 U CN 207091049U
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- insulation shell
- cathode bar
- anode ring
- liquid phase
- temperature plasma
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Abstract
The utility model provides a kind of liquid phase low-temperature plasma generator, the generator includes insulation shell, cathode bar, anode ring and dividing plate, one end of the insulation shell is provided with media outlet, the other end is provided with medium inlet, the cathode bar, anode ring and dividing plate are located in insulation shell, one end of the cathode bar is fixed on one end that insulation shell sets medium inlet, the dividing plate is provided with multiple water holes, the diaphragm housing ring is on cathode bar, the anode ring is located at one end that insulation shell sets media outlet, and cathode bar and the anode ring is coaxial.The utility model is when in use, medium enters generator by two medium inlets, Hydrodynamic cavitation effect occurs by three-level apertured partition at a high speed and produces a large amount of microbubbles, then region of discharge is flowed to, two electrodes are in the presence of pulse high-voltage, generation electrion produces plasma, for degradable organic pollutant and kills microorganism, effect is very good.
Description
Technical field
Liquid phase plasma discharge technology and Hydrodynamic Cavitation Technology field are the utility model is related to, specifically a kind of liquid phase is low
Isothermal plasma electrical discharge generator.
Background technology
1985, Clements doctor and Zuo rattans doctor initiated high-voltage pulse being applied to underwater electrode discharge, with production
Raw OH free radicals are for the organic pollution in degradation water and kill microorganism.Research finds that the length of discharge current passage takes
Certainly in the electrical conductivity of the size of institute's input voltage, pulse width, electrode polarization and water.Confirm under high voltage pulse effect, have
When bubble blasts, air pocket is separated into many microbubbles, exposes oxygen in by deionized water of the hollow space into reactor
Gas discharge is dissociated during gas, and ozone is detected in liquid phase, and its concentration depends on voltage, processing time and oxygen-supplying amount, when exposing nitrogen,
The presence of ozone is not found.Computer MSR Information system using former Japanese group horse college professor Sato as representative, to the thing in discharge process
Reason process and chemical process are studied in detail.Find in an experiment, electrical conductivity has certain shadow to the density of free radical
Ring, when electrical conductivity is 10 ~ 80 μ S/cm, main free radical such as OH, H etc. density reach maximum, when electrical conductivity surpasses
When crossing 80 μ S/cm, with the increase of electrical conductivity, the density of free radical has declined again.They think relatively low electrical conductivity（<10μ
S/cm）The further development without corona in aeration discharge reactor under liquid is limited, thus have impact on region of discharge free radical
Yield.Willberg and Lang etc. analyzes the characteristics of high-voltage pulse discharge in water, it is believed that degraded of the organic matter in liquid system
Two kinds of factors can be attributed to：Physical action based on zero-order reaction and the action of plasma based on first order reaction.They think
Electric discharge forms plasma channel, and a part of organic matter is degraded in plasma channel, a part of then lead in plasma
It is degraded outside road.This generator employs cavitation technique simultaneously, and Hydrodynamic cavitation refers to when liquid internal local pressure reduces（It is main
If pressure is caused to reduce by high flow rate）The substantial amounts of micro-bubble formed on liquid internal or the solid interface of liquid（Cavitation bubble）
Formation, develop and the process that crumbles and fall.When cavitation bubble flows out this region with fluid, because pressure increases suddenly, bubble is crumbled and fall,
So as to produce cavitation effect.Bubble collapse can produce local HTHP, strong shock wave and high-speed micro-jet, this be
It is difficult under normal temperature and pressure conditionses or impossible chemical reaction provides a kind of very special physicochemical environment.
The main path of Hydrodynamic cavitation degradation of organic substances has direct thermal decomposition, radical reaction, supercritical water oxidation effect
Deng.Hydrodynamic cavitation generating means has two kinds：When Venturi tube, second, orifice plate.Orifice plate has structure letter compared with Venturi tube
Single, the characteristics of can easily be accommodated, and caused cavitation intensity is more much higher than Venturi tube in orifice flow.By using
More hole plates are throttled, and are changed piping flow, flow velocity of the fluid after by orifice plate is increased sharply, and form high flow rate, from
And the pressure after orifice plate is reduced, cavitation will occur when reducing to a certain extent.
High-voltage pulse discharge in water technology is a kind of new wastewater treatment technology of advanced oxidation, is free-radical oxidation, high temperature
Thermal degradation, high energy electron bombardment, ozone oxidation, ultraviolet degradation, photochemical oxidation, supercritical water oxidation, cavitation technology etc. are more
The comprehensive embodiment of kind effect.In recent years, numerous scholars combine these effects possessed by high pressure pulse discharge itself by the technology
Joined together with other high-level oxidation technologies, so as to further promote the degraded of organic matter.
After the 1980s, liquid phase high pressure pulse discharge plasma is widely used in grinding in terms of water pollution control
Study carefully.For toxic organic pollutant in waste water, the country makes great progress in the field.After 1996, China starts
Method treatment research result using impulse electric corona come degradation of organic waste water, Li Shengli etc. using high-pressure basic granulite
It was found that being less than 9.04 in initial soln PH, when handling 30s, the supernatant C OD of water sample reduces 42.6%.Zhejiang University utilizes four
The gas-liquid mixed phase pulsed discharge plasma system of needle to board electrode form, due to adding the number of sparking electrode, is thus provided
The sphere of action of reaction system, the purpose for improving organic matter degradation effect is reached.Test result indicates that at pulse voltage peak
Be worth under the operating condition for being 18mm for 20KV, pulse frequency 150HZ, electrode spacing, discharge 30min when methyl red degraded effect
Rate reaches 99%.Harbin Institute of Technology uses gas-liquid mixed phase discharge type, and adds activated alumina between sparking electrode and fill out
Material, due to the catalytic action of filler, the removal efficiency of the organic matter such as methylene blue, phenol is greatly improved, to discharge process
In the amount of caused hydrogen peroxide and ozone be measured, and then inquire into the mechanism of degradation of phenol.Divalence is added into reactor
The catalyst such as iron ion, ferric ion, hydrogen peroxide and Powdered Activated Carbon can improve the degradation rate of phenol.
Utility model content
The problem of the utility model exists for prior art, there is provided a kind of liquid phase discharge of plasma in low temperature generator,
Solves the degradation problem of Organic substance in water pollution.
Goal of the invention of the present utility model is achieved through the following technical solutions：
A kind of liquid phase low-temperature plasma generator, it is characterised in that the generator includes insulation shell, cathode bar, sun
Polar ring and dividing plate, one end of the insulation shell are provided with medium inlet, the cathode bar, anode provided with media outlet, the other end
Ring and dividing plate are located in insulation shell, and one end of the cathode bar is fixed on one end that insulation shell sets medium inlet, described
Dividing plate is provided with multiple water holes, and on cathode bar, the anode ring is located at insulation shell and sets media outlet the diaphragm housing ring
One end, cathode bar and the anode ring is coaxial.
Further, the dividing plate is provided with three, and three baffle intervals are enclosed on cathode bar.
Further, the cathode bar is made up of metal tungsten material, and the anode ring is made up of brass, the insulation shell
It is made up of lucite.
Further, the inwall of insulation shell is close in the periphery of the dividing plate.
Further, the cathode bar is fixed on one end of insulation shell and passes insulation shell, the end and insulation shell it
Between be provided with gasket seal.
Further, insulating supporting is provided between the anode ring and insulation shell, the anode ring is consolidated by insulating supporting
It is scheduled on insulation shell, the copper conductor for leading to the wiring point of anode ring outside insulation shell is provided with the insulating supporting.
Further, the medium inlet is provided with two.
Further, the insulation shell is cylindrical, and the common footpath in two medium inlets is arranged on the side wall of insulation shell, institute
Media outlet is stated to be arranged at the end center of insulation shell.
Compared with prior art, when in use, medium enters generator to the utility model by two medium inlets, passes through at a high speed
Cross three-level apertured partition cavitation effect occurs and produces a large amount of microbubbles, then flow to region of discharge, two electrodes are in pulse high-voltage
In the presence of, electrion occurs and produces plasma, for degradable organic pollutant and kills microorganism, effect is very good.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the B-B profiles of generator shown in Fig. 1；
Fig. 3 is the C-C profiles of generator shown in Fig. 1；
Description of reference numerals：
1 is cathode bar, and 2 be one-level dividing plate, and 3 be two level dividing plate, and 4 be three-level dividing plate, and 5 be insulating supporting, and 6 be anode ring, 7
For copper conductor, 8 be insulation joint box, and 9 be gasket seal, and 10 be region of discharge, and 11 be insulation shell, and 12 be medium inlet, 13
It is water hole for media outlet, 14.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
The utility model provides a kind of liquid phase low-temperature plasma generator, and as shown in Fig. 1 ~ Fig. 3, the generator includes exhausted
Edge housing 11, cathode bar 1, anode ring 6 and dividing plate.One end of insulation shell 11 is provided with media outlet 13, the other end is provided with medium
Entrance 12.Cathode bar 1, anode ring 6 and dividing plate are located in insulation shell 11, and one end of cathode bar 1 is fixed on insulation shell 11 and set
Put one end of medium inlet 12.Dividing plate is provided with multiple water holes 14, and diaphragm housing ring is on cathode bar 1.Anode ring 6 is located at insulation shell
Body 11 sets one end of media outlet 13.Cathode bar 1 is not affixed between one end end of insulation shell 11 and anode ring 6
Form region of discharge 10.Wherein the external diameter of cathode bar 1 is 12mm, it is contemplated that electric discharge produces temperature height, and negative electrode easily corrodes, negative electrode
From the high metal tungsten material of fusing point；Anode ring 6 is big to ensure discharge face, and anode ring width is 5mm, internal diameter 16mm, with negative electrode
At a distance of 6mm, brass that material selection conducts electricity very well, with negative electrode coaxial placement.
Dividing plate is provided with three：One-level dividing plate 2, two level dividing plate 3, three-level dividing plate 4, three baffle intervals are enclosed on cathode bar 1,
Form three-level dividing plate.Three-level dividing plate is insulation barrier, and cavitation effect is produced under high flow rate effect in medium, puts region of discharge
Electric effect is more preferable and increases the degradation efficiency of organic pollutants.
It is close to the inwall of insulation shell 11 in the periphery of dividing plate.Junction is easily revealed in this generator, seal approach need to be taken,
In junction, increase gasket seal is sealed, and gasket seal selects non-conductive graphite material, such as：Cathode bar 1 is fixed on absolutely
One end of edge housing passes insulation shell, and gasket seal 9 is provided between the end and insulation shell.
Insulating supporting 5 is provided between anode ring 6 and insulation shell, the anode ring is fixed on insulation shell by insulating supporting
On, the copper conductor 7 for leading to the wiring point of anode ring outside insulation shell is provided with insulating supporting.
Medium inlet is provided with two.Insulation shell is cylindrical, the common footpath in two medium inlets（Line passes through the center of circle）Set
In the side wall of insulation shell, media outlet is arranged at the end center of insulation shell.
The part that the utility model is related to is described as follows：
（1）Cathode bar
Negative electrode uses stick electrode, and bar electrode is kept flat, and exposed one end fully contacts with aqueous medium, and is made of insulation barrier
Support.Why select bar electrode for negative electrode be because between electrode apply voltage after, the non-uniform electric between electrode,
The radius of curvature of bar electrode is small, is nearby highfield, the field strength increase near negative electrode, can greatly increase the ease of cathode electronics
Go out, while the acceleration also fled from for electronics after negative electrode creates favourable condition.When being produced in view of electric arc, extreme temperatures, electricity
Pole especially negative electrode is easily by ablation, therefore bar electrode uses the high tungsten of fusing point, and the high mechanical strength of tungsten, resists
It is ablative strong.
Cathode bar exposes generator insulation shell, and sets insulation joint box, and increases between cathode bar and insulation shell
Encrypt gasket.
（2）Anode ring
Anode is loop configuration, and with negative electrode coaxial placement, its section is parallel with negative electrode end face, spacing 6mm, annular sun
Pole internal diameter 16mm, width 5mm.Circular anode uses short anode form, can not only reduce loss, and can make affined
Electron stream being flowed in water evenly.Anode is just with the brass to conduct electricity very well.Anode ring is fixed on insulating supporting, and with
Cathode bar is coaxial, and is led to wiring point outside insulation shell with copper conductor 7, and sets insulation joint box 8.
（3）Three-level dividing plate
Dividing plate point three-level is set, material selection insulating materials, and centre sets multiple water holes, can not only ensure what is supplied water
Function, and the effect that microbubble is produced in water cavitation effect is served, so as to enhanced discharge effect.
Told on to improve plasma, sewage is sent into by high-pressure pump from plasma generator water inlet pipe mouth to be occurred
Device, after at the multiple holes of the three-level insulation barrier that is set in by generator cavitation effect occurring producing substantial amounts of microbubble and being
The electrion in face does processing early stage and prepared.
（4）Insulation shell
For insulation crust to prevent additional cathode electric discharge corrosion, propeller is to be in periodicity electric arc environment at work
In, it is desirable to selected material should have arc resistance.Lucite has excellent arc resistance, the material table under arcing
Face will not produce the conductive path and arc tracking phenomenon of carbonization.Therefore, the material selection lucite of insulation crust.
Two entrances, one outlet are set on insulation shell, and gateway tubing uses insulating materials.
（5）Gasket seal
The place easily leaked in each part junction sets containment member.Spilt in negative electrode and anode at shell all
There is the possibility leaked, should all carry out seal approach.All sealings use pressure seal.Encapsulant selects flexible stone
Ink material.
When in use, the negative electrode and anode of generator need to connect power supply processing unit to the utility model, and power supply processing is single
The reasonable setting of member is to improve the precondition of water treatment efficiency, so high-voltage pulse power source is core device of the present utility model
Part.Power source charges mode is charged using constant current charging method to storage capacitor, and charging is uniformly and speed is fast.High-voltage pulse
Power supply is highly integrated with integrated, can reduce floor space of the present utility model.High-voltage pulse power source crest voltage 10KV ~
30KV, 100 ~ 1000HZ of frequency range, 1 ~ 5A of rated current, 10 ~ 100ns of rising edge of a pulse, the μ s of μ s of pulse width 1.5 ~ 10.Sun
Pole is connected on high-voltage pulse power source with cathode terminal by wire.
In sewage disposal process, insulating properties inspection is done first before experiment, it is ensured that safe and reliable.Close high-voltage pulse power source,
First water flowing water flowing in generator runs 1min, pulse power voltage is adjusted into 0V, set of frequency is in 100HZ, rising edge of a pulse
100ns, the μ s of pulse width 10.High-voltage pulse power source is opened, voltage is gradually risen to 10KV, observes water quality testing meter COD parameters
Change, observe variation effect.Raise voltage to 30KV, COD variation effects again to significantly improve, adjustment flow velocity makes COD stabilizations exist
150mg/L。
Sewage after premenstruum (premenstrua) processing, the region of discharge between cathode bar and anode ring, applies between electrodes
High-voltage pulse power source.High-voltage pulse power source crest voltage 30KV, pulse frequency 500HZ, 10 ~ 100ns of pulse front edge, bipolarity arteries and veins
Punching.When handling medium by rapid increase and the extremely short pulse of pulsewidth, discharge in water produces Athermal plasma.Non-thermal plasma
Body means that electron energy or temperature are higher than background molecular or ion.Because energy is added in electronically, rather than ion and background
On hydrone, when background water environment temperature is held essentially constant, electronics can obtain 3 ~ 20eV energy.Streamer corona discharge
Energy efficiency can be made to be greatly improved, reason is that ion can not in the presence of rapid increase and the extremely short pulse of pulsewidth
The movement of relatively large distance is carried out, therefore energy expenditure will not be produced.Moment high electric field make electrons gain energy and with the water of surrounding
Collided, cause the formation of active particle or free radical.These active particles or free radical can organise with various
Compound is reacted.
Preferred embodiment of the present utility model is the foregoing is only, not to limit the utility model, should be referred to
Go out, all made within spirit of the present utility model and principle all any modification, equivalent and improvement etc., all should include
Within the scope of protection of the utility model.
Claims (8)
1. a kind of liquid phase low-temperature plasma generator, it is characterised in that the generator includes insulation shell, cathode bar, anode
Ring and dividing plate, one end of the insulation shell are provided with medium inlet, the cathode bar, anode ring provided with media outlet, the other end
Be located at dividing plate in insulation shell, one end of the cathode bar is fixed on one end that insulation shell sets medium inlet, it is described every
Plate is provided with multiple water holes, and on cathode bar, the anode ring is located at insulation shell and sets media outlet the diaphragm housing ring
One end, cathode bar and the anode ring are coaxial.
2. a kind of liquid phase low-temperature plasma generator according to claim 1, it is characterised in that the dividing plate is provided with three
Individual, three baffle intervals are enclosed on cathode bar.
3. a kind of liquid phase low-temperature plasma generator according to claim 1, it is characterised in that the cathode bar is by gold
Category tungsten material is made, and the anode ring is made up of brass, and the insulation shell is made up of lucite.
A kind of 4. liquid phase low-temperature plasma generator according to claim 1, it is characterised in that the periphery of the dividing plate
It is close to the inwall of insulation shell.
5. a kind of liquid phase low-temperature plasma generator according to claim 1, it is characterised in that the cathode bar is fixed
Insulation shell is passed in one end of insulation shell, gasket seal is provided between the end and insulation shell.
A kind of 6. liquid phase low-temperature plasma generator according to claim 1, it is characterised in that the anode ring with absolutely
Insulating supporting is provided between edge housing, the anode ring is fixed on insulation shell by insulating supporting, is set in the insulating supporting
There is the copper conductor for leading to the wiring point of anode ring outside insulation shell.
7. a kind of liquid phase low-temperature plasma generator according to claim 1, it is characterised in that the medium inlet is set
There are two.
8. a kind of liquid phase low-temperature plasma generator according to claim 7, it is characterised in that the insulation shell is in
Cylindrical shape, the common footpath in two medium inlets are arranged on the side wall of insulation shell, and the media outlet is arranged on the end of insulation shell
At center.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720697916.6U CN207091049U (en) | 2017-06-15 | 2017-06-15 | A kind of liquid phase low-temperature plasma generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720697916.6U CN207091049U (en) | 2017-06-15 | 2017-06-15 | A kind of liquid phase low-temperature plasma generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908563A (en) * | 2020-06-05 | 2020-11-10 | 南昌航空大学 | Method for rapidly degrading organic pollutants in water body through liquid-phase cathode plasma discharge |
-
2017
- 2017-06-15 CN CN201720697916.6U patent/CN207091049U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111908563A (en) * | 2020-06-05 | 2020-11-10 | 南昌航空大学 | Method for rapidly degrading organic pollutants in water body through liquid-phase cathode plasma discharge |
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