CN207330422U - A kind of Air-oil mixing film low-temperature plasma wastewater treatment device - Google Patents
A kind of Air-oil mixing film low-temperature plasma wastewater treatment device Download PDFInfo
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- CN207330422U CN207330422U CN201721135587.2U CN201721135587U CN207330422U CN 207330422 U CN207330422 U CN 207330422U CN 201721135587 U CN201721135587 U CN 201721135587U CN 207330422 U CN207330422 U CN 207330422U
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Abstract
A kind of Air-oil mixing film low-temperature plasma wastewater treatment device, waste water and working gas are each led into plasma device, and wherein working gas is incorporated into inside gas band conical distributor, and waste water is then slowly flowed down along outer surface of the gas with conical distributor；The gas band that working gas is distributed by gas with conical distributor surface, under gas pressure effect, disperses around with waste water formation gas-liquid two-phase film of the gas with conical distributor outer wall and enters the low temperature plasma environment inside high-field electrode；Gas-liquid two-phase film discharge under low temperature plasma environment produce active group react with the organic pollution in water.Waste water and working gas formation gas-liquid two-phase film are dispersed around and enter high-field electrode internal plasma environment by the utility model using gas band conical distributor, formed gas-liquid two-phase film discharge at the same time produce active group directly contact and react with water pollutant, improve the removal rate and capacity usage ratio of pollutant.
Description
Technical field
The utility model is related to plasma technique field of wastewater treatment, more particularly to a kind of Air-oil mixing film low temperature etc. from
Daughter wastewater treatment equipment.
Background technology
With the fast development of China's process of industrialization, the generation of a large amount of waste water and discharge to daily life and strong
Health all brings serious threat.The complicated component of these waste water, COD COD high, biodegradability difference and discharge of wastewater
Measure big etc. so that traditional biochemical process, Physical and chemical Treatment is extremely difficult to such waste water quality under certain condition
Purification requires and target.Plasma technique is a kind of new, the environmentally protective high-level oxidation technology developed in recent years, its profit
The ozone that is formed with electrion, ultraviolet, high energy electron, enrichment particle, excited atom, molecule and living radical (
OH, H, O, N) etc. have oxidisability high activity group degradation organic matter, poisonous and hazardous material is become nontoxic nothing
The material of evil or low toxicity, larger molecular organics are changed into small organic molecule, or even are thoroughly mineralized into CO2、H2O and inorganic salts, from
And the removal so that pollutant is degraded.Plasma technique is as a kind of emerging environmentally friendly high-level oxidation technology, tool
Have the advantages that no pollution, low emission, applicability is wide and treatment effeciency is high, have a good application prospect in field of waste water treatment.
At present, using dielectric barrier discharge generation corona treatment waste water, there are three kinds of forms, i.e. gas phase discharges, pure liquid
Electric discharge and gas-liquid mixed discharge.Wherein, gas phase discharges plasma technique is most commonly seen, but work gas in this kind of discharge type
It is phase separation with waste water, the active group with oxidisability for generation of discharging is delivered to from gas phase when needing certain in waste water
Between, and the restricted lifetime of active group, it is instantaneous to dissipate, so the active group limited amount of reaction can be really participated in waste water,
The removal rate and removal efficiency of pollutant can so be reduced.In addition, the effect that pure liquid electric discharge produces plasma is relatively poor, and
It is of little use.So the form that gas-liquid mixed discharge produces plasma is increasingly taken seriously.
There are some researchers and produced using gas-liquid mixed discharge the method or technique of plasma now.Such as《One
Kind enters ability of swimming pulsed discharge plasma wastewater treatment equipment entirely》(number of patent application 201520611873.6), passes through solarization air cap
The active group that air is passed through into waste water produces gas-liquid two-phase mixing electric discharge is directly contacted and reacted with organic pollution, right
The processing of waste water achieves good effect, but it is caused primary disadvantage is that using aeration form progress gas-liquid mixed discharge
The plasma density that reactor plasma produces the uneven and liquid phase of speed, gas phase produces is uneven, waste water
Pollutant removal situation is unstable；And the volume of liquid phase is much larger than gas phase, so discharge excitation produces the effect of plasma
Also can be relatively poor.
In order to solve above-mentioned problem, some researchers are discharged in the form of aqueous vapor film is formed, and improve plasma
The stimulation effect of body.Such as《A kind of linear DBD plasma organic waste-water treating apparatus》(number of patent application
201410482440.5) form of electric discharge, is mixed using a kind of moisture film and gas, waste water is entered by the inlet channel of lower part and connects
Between ground electrode, around the quartz cover outside grounding electrode formed uniformly continuous moisture film, external air source by admission line to
Input service gas between two insulation medium boards, so that mixing electric discharge produces plasma；This method is produced in gas-liquid mixed discharge
Improve to some extent in terms of plasma effect, but top air inlet excitation produces plasma, bottom intakes and to form water since it is used
The form of film, equally exist gas phase, produce plasma and liquid phase between mass transfer effect it is poor the problem of.Such as《A kind of plasma
Body wastewater treatment equipment》(number of patent application 201520997031.9), employs air-dissolving apparatus, and air and waste water are first mixed
After conjunction, enter back into plasma reaction device and reacted, obtain preferable water treatment effect, but the device uses
It is that the more difficult control of flow velocity, water droplet is larger, does not can be uniformly dispersed between gas-liquid mixture is directly sprayed in positive and negative electrode, and
Air-water mixture discharge time is shorter, excites the effect of the plasma of generation relatively poor.
Utility model content
The purpose of this utility model is to provide a kind of Air-oil mixing film low-temperature plasma wastewater treatment device, using gas band
Conical distributor by waste water and working gas formed gas-liquid two-phase film disperse around and enter inside high-field electrode etc.
Gas ions environment, the gas-liquid two-phase film of formation discharges at the same time to be produced active group and directly contacts and react with water pollutant, is carried
The removal rate and capacity usage ratio of high pollution thing.
To achieve the above object, the utility model is realized using following technical scheme：
A kind of Air-oil mixing film low-temperature plasma wastewater treatment device, including reactor, gas band conical distributor, spiral
Dielectric barrier discharge plasma device, the high-voltage ac power of shape electrode；Reactor for insulation seal casinghousing, reactor top
End is provided with working gas import, waste water inlet, and reactor bottom is provided with water outlet；The dielectric barrier discharge of spiral electrode
Plasma device is arranged in reactor；Gas is located at the dielectric barrier discharge plasma of spiral electrode with conical distributor
It is not at the center of device and not 10-60 ° with contact electrode, angle of taper of the gas with conical distributor, for the cone of sealing,
If surface is provided with dry gas band, top of the gas with conical distributor is connected with working gas import, and waste water inlet is introduced directly into
Onto outer wall of the gas with conical distributor, the dielectric barrier discharge plasma device connection high-voltage alternating of the spiral electrode
Power supply.
The dielectric barrier discharge plasma device of the spiral electrode includes high-pressure spiral electrode, block media, connects
Ground electrode, the supreme helically linear extension downwards inside block media of high-pressure spiral electrode, the whole circle in block media outside are furnished with
Netted grounding electrode, high-pressure spiral electrode and grounding electrode pass through the high-voltage ac power outside conducting wire coupled reaction device.
The material of the block media is the quartz glass tube of deshydroxy type, and the high-pressure spiral electrode is 316L stainless steels
Matter, flight pitch 10-50mm are isometric with block media；The grounding electrode is the mesh electrode of 316L stainless steels, long
Degree is isometric with block media.
The reactor includes outer tube, base, and base is fixed on the bottom of outer tube, and the upper end of outer tube passes through sealing
Plug and seal ring seal, the material of the outer tube and base is acrylic material, and outer tube ratio of height to diameter is 2:1-10:1.
Compared with prior art, the beneficial effects of the utility model are：
1) the utility model provides a kind of Air-oil mixing film low-temperature plasma wastewater treatment device, can effectively improve useless
The ability and efficiency of water process.
2) the utility model using gas with conical distributor by the working gas of its internal certain pressure and its outer surface
Waste water forms flow speed stability, thin and thick is moderate and uniform, is not dispersed around in the gas-liquid two-phase film of spray liquid drop-wise, in low temperature
Discharge at the same time under plasma environment and produce active group, and make organic pollution in water and the active group of generation direct
Situ contact and original position react, and reduce the phenomenon of decay or dissipation of the active group in mass transport process is migrated so that dirty
The contact probability for contaminating thing and active group increases, and improves the removal rate of pollutant.
3) improvement of spiral electrode pattern increases the contact area of gas-liquid film and plasma generator, ensure that
The launching efficiency of plasma, generation OH, H of maximal efficiency2O2、O3Deng high activity oxide, organic matter in degrading waste water,
It is set to be mineralized into carbon dioxide and water.Under conditions of quantitative wastewater treatment, reduce processing time and number of processes.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of Air-oil mixing film low-temperature plasma wastewater treatment device of the utility model.
In figure：1- sealing rings, 2- high-voltage ac powers, 3- waste water stostes storage tank, 4- air pumps, 5- sealing-plugs, 6- overcoats
Pipe, 7- grounding electrodes, 8- block medias, 9- gas band conical distributor, 10- high-pressure spirals electrode, 11- bases, 12- treatment fluids return
Receive groove.
Embodiment
The embodiment of the utility model is further illustrated with reference to Figure of description：
A kind of Air-oil mixing film low temperature plasma wastewater treatment method, specific method are as follows：By waste water and working gas
Each led into according to flow rate in plasma wastewater treatment device, by entered at the top of plasma device low temperature etc. from
In daughter environment；Wherein working gas is incorporated into inside gas band conical distributor 9, and waste water is then along gas with conical distributor 9
Outer surface slowly flows down；The gas band that working gas is distributed by gas with 9 surface of conical distributor, under gas pressure effect, with
Waste water of the gas with 9 outer wall of conical distributor forms gas-liquid two-phase film and disperses around and enter high-field electrode at a certain angle
Internal low temperature plasma environment；In this process, gas-liquid two-phase film discharges generation under low temperature plasma environment
Active group is directly contacted and reacted with the organic pollution in water.
High-voltage ac power 2 is connected, dielectric barrier discharge, excitation are formed by high-pressure spiral electrode 10 and block media 8
Gas-liquid two-phase film produces active group and directly contacts and react with the organic pollution in water, makes the organic matter in waste water thorough
It is mineralized as water and carbon dioxide.
The low temperature plasma environment is provided by the dielectric barrier discharge plasma device of spiral electrode, its high pressure
2 output voltage of AC power is 0-30KV, frequency 6-7KHz.
The air water velocity ratio of the working gas and waste water is 5:1-20:1, the wastewater treatment reaction time is 10-180min.
The working gas can be one or more of combination of gases in air, oxygen, nitrogen.
A kind of Air-oil mixing film low-temperature plasma wastewater treatment device, including reactor, gas band conical distributor 9, spiral shell
Revolve dielectric barrier discharge plasma device, the high-voltage ac power 2 of shape electrode；Reactor is the seal casinghousing of insulation, is reacted
Device top is provided with working gas import, waste water inlet, and reactor bottom is provided with water outlet；The dielectric impedance of spiral electrode
Plasma discharging body device is arranged in reactor；Gas is located at dielectric barrier discharge of spiral electrode etc. with conical distributor 9
At the center of ion body device and not with contact electrode, angle of taper of the gas with conical distributor 9 is 10-60 °, for sealing
Cone, if surface is provided with dry gas band, top of the gas with conical distributor 9 is connected with working gas import, waste water inlet
It is introduced directly on outer wall of the gas with conical distributor 9, the dielectric barrier discharge plasma device of the spiral electrode connects
Connect high-voltage ac power 2.
The dielectric barrier discharge plasma device of the spiral electrode include high-pressure spiral electrode 10, block media 8,
Grounding electrode 7, high-pressure spiral electrode 10 are whole in the supreme helically linear extension downwards in the inside of block media 8, the outside of block media 8
Circle passes through the high-voltage alternating outside conducting wire coupled reaction device equipped with netted grounding electrode 7, high-pressure spiral electrode 10 and grounding electrode 7
Power supply 2.Bottom cover is equipped with the bottom of the dielectric barrier discharge plasma device of spiral electrode, which, which is installed on, stops Jie
The lower end of matter 8, which is provided with through hole.
The material of the block media 8 is the quartz glass tube of deshydroxy type, and the high-pressure spiral electrode 10 is stainless for 316L
Steel material, flight pitch 10-50mm are isometric with block media 8；The grounding electrode 7 is netted for 316L stainless steels
Electrode, length and block media 8 are isometric.
The reactor includes outer tube 6, base 11, and base 11 is fixed on the bottom of outer tube 6, the upper end of outer tube 6
Sealed by sealing-plug 5 and sealing ring 1, the material of the outer tube 6 and base 11 is acrylic material, 6 ratio of height to diameter of outer tube
For 2:1-10:1.
The requirement such as heat-resisting quantity, translucency in view of 8 housing of block media, the preferred material of block media 8 is deshydroxy
The quartz glass tube of type, glass tube external diameter and length should be less than the internal diameter and height of outer tube 6, and have enough spacing.Stop
The upper end of medium 8 is fixedly connected with sealing-plug 5, and high-pressure spiral electrode 10 is also fixed by sealing-plug 5, and upper end is stretched out sealing-plug 5 and connected
Connect high-voltage ac power 2.
Gas plays the role of gas-liquid mixed with conical distributor 9 and forms uniform gas-liquid two-phase film to a certain extent,
So that the organic matter in the instantaneous in-situ treatment waste water of active group produced, reduces active group declining in mass transport process is migrated
The phenomenon for subtracting or dissipating, improves the removal rate of pollutant.The waste water of certain flow rate ratio and working gas are filled by plasma
The top put is had respectively entered in low temperature plasma environment；Wherein working gas is entered inside gas band conical distributor 9, is given up
Water is then slowly flowed down along outer surface of the gas with conical distributor 9.Being provided with multilayer aspect ratio on gas band conical distributor 9 is
20:1 rectangle gas band, every layer of gas band are uniformly surround on circumferencial direction of the gas with conical distributor 9, between levels gas band
Left and right interlocks., can be by waste water of the gas with 9 outer wall of conical distributor and the work gas bodily form diffused out using the pressure of working gas
Dispersed around into gas-liquid two-phase film.Under the action of high-voltage ac power, gas-liquid two-phase film excites generation activity at the same time
Group, forms highdensity active group region so that organic pollution therein interacts with active group, so as to reach
The purpose of oxidative degradation water pollutant.
In the range of 10-60 °, gas-liquid two-phase film excitation at this time produces angle of taper of the taper gas with conical distributor 9
Active group concentration it is high, and at this time Air-oil mixing film flow speed stability, thin and thick is moderate and uniform, can form gas-liquid two-phase film
Without becoming the drop of spray, the contact probability bigger with active group, be conducive to improve the removal rate of pollutant.
Embodiment 1：High-concentration hardly-degradable waste water pre-processes
The raw water quality of certain Coking Plant Wastewater is as shown in table 1.
The raw water quality of 1 certain Coking Plant Wastewater of table
Coking wastewater raw water is taken, raw water pH=8.5 each leads into oxygen and waste water, and air water velocity ratio is 7:1, reactor
The ratio of height to diameter of outer tube 6 is 3：1.Angle of taper of the gas with conical distributor 9 is 45 °.Whole reaction carries out under voltage 10KV,
Supply frequency is 7KHz.After reacting 60min, it is as shown in table 2 that COD, volatile phenol and colourity, the water quality after processing is measured by sampling.
Effluent quality (embodiment 1) after the processing of 2 plasma device of table
Embodiment 2：Low concentration used water difficult to degradate advanced treating
Secondary clarifier effluent water quality is as shown in table 3 after certain coke-oven plant's biochemical treatment.
The effluent quality of secondary settling tank after certain the coke-oven plant's biochemical treatment of table 3
Coking wastewater secondary clarifier effluent is taken, raw water pH=6.5 each leads into air and waste water, and air water velocity ratio is 5:1,
The ratio of height to diameter of reactor jacket pipe 6 is 3:1.Angle of taper of the gas with conical distributor 9 is 45 °.Entirely react under voltage 6KV
Carry out, supply frequency 7KHz.After reacting 45min, COD, colourity is measured by sampling, the water quality after processing is as shown in table 4.
Effluent quality (embodiment 2) after the processing of 4 plasma device of table
Citing is only the limited specific embodiment of the utility model above.It is noted that the utility model is not limited to
Above example, those skilled in the art produce association and deformation, the protection in the utility model by above-described embodiment
Within the scope of.
Claims (4)
1. a kind of Air-oil mixing film low-temperature plasma wastewater treatment device, it is characterised in that including reactor, gas band taper point
Dielectric barrier discharge plasma device, the high-voltage ac power of cloth device, spiral electrode；Reactor is the capsul of insulation
Body, reactor top are provided with working gas import, waste water inlet, and reactor bottom is provided with water outlet；Spiral electrode
Dielectric barrier discharge plasma device is arranged in reactor；Gas is located at the dielectric impedance of spiral electrode with conical distributor
At the center of plasma discharging body device and it is not 10-60 ° with contact electrode, angle of taper of the gas with conical distributor, is
The cone of sealing, if surface is provided with dry gas band, top of the gas with conical distributor is connected with working gas import, waste water
Import is introduced directly on outer wall of the gas with conical distributor, the dielectric barrier discharge plasma device of the spiral electrode
Connect high-voltage ac power.
A kind of 2. Air-oil mixing film low-temperature plasma wastewater treatment device according to claim 1, it is characterised in that institute
Stating the dielectric barrier discharge plasma device of spiral electrode includes high-pressure spiral electrode, block media, grounding electrode, high pressure
Screw electrode supreme helically linear extension downwards inside block media, the whole circle in block media outside is equipped with netted ground connection electricity
Pole, high-pressure spiral electrode and grounding electrode pass through the high-voltage ac power outside conducting wire coupled reaction device.
A kind of 3. Air-oil mixing film low-temperature plasma wastewater treatment device according to claim 2, it is characterised in that institute
The material for stating block media is the quartz glass tube of deshydroxy type, and the high-pressure spiral electrode is 316L stainless steels, between screw thread
It is isometric with block media away from for 10-50mm；The grounding electrode is the mesh electrode of 316L stainless steels, and length is with stopping
Medium is isometric.
A kind of 4. Air-oil mixing film low-temperature plasma wastewater treatment device according to claim 1, it is characterised in that institute
Stating reactor includes outer tube, base, and base is fixed on the bottom of outer tube, and the upper end of outer tube passes through sealing-plug and sealing ring
Sealing, the material of the outer tube and base is acrylic material, and outer tube ratio of height to diameter is 2:1-10:1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721135587.2U CN207330422U (en) | 2017-09-06 | 2017-09-06 | A kind of Air-oil mixing film low-temperature plasma wastewater treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721135587.2U CN207330422U (en) | 2017-09-06 | 2017-09-06 | A kind of Air-oil mixing film low-temperature plasma wastewater treatment device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459098A (en) * | 2017-09-06 | 2017-12-12 | 中钢集团鞍山热能研究院有限公司 | A kind of Air-oil mixing film low temperature plasma method of wastewater treatment and device |
| CN108558115A (en) * | 2018-06-14 | 2018-09-21 | 淮安信息职业技术学院 | High pressure pulse discharge apparatus for treating sewage |
| CN111559788A (en) * | 2020-05-19 | 2020-08-21 | 重庆工商大学 | Inclined conveyor belt dielectric barrier discharge pollutant treatment device |
-
2017
- 2017-09-06 CN CN201721135587.2U patent/CN207330422U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459098A (en) * | 2017-09-06 | 2017-12-12 | 中钢集团鞍山热能研究院有限公司 | A kind of Air-oil mixing film low temperature plasma method of wastewater treatment and device |
| CN107459098B (en) * | 2017-09-06 | 2024-02-02 | 中钢集团鞍山热能研究院有限公司 | Gas-liquid two-phase film low-temperature plasma wastewater treatment method and device |
| CN108558115A (en) * | 2018-06-14 | 2018-09-21 | 淮安信息职业技术学院 | High pressure pulse discharge apparatus for treating sewage |
| CN111559788A (en) * | 2020-05-19 | 2020-08-21 | 重庆工商大学 | Inclined conveyor belt dielectric barrier discharge pollutant treatment device |
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