CN115636473A - Water treatment device and method based on plasma - Google Patents
Water treatment device and method based on plasma Download PDFInfo
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- CN115636473A CN115636473A CN202211361807.9A CN202211361807A CN115636473A CN 115636473 A CN115636473 A CN 115636473A CN 202211361807 A CN202211361807 A CN 202211361807A CN 115636473 A CN115636473 A CN 115636473A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 3
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- 229910002651 NO3 Inorganic materials 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
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Abstract
The invention provides a water treatment device and method based on plasma, relates to the technical field of water treatment, and aims to solve the problem of low treatment efficiency caused by the fact that large-area stable jet plasma cannot be supplied.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a water treatment device and method based on plasma.
Background
Plasma discharge, a water treatment technology combining rapid treatment and green treatment, can produce different forms of physical and chemical effects, and can produce some oxidizing particles, including active radicals (hydrogen radicals, oxygen radicals, hydroxyl radicals, etc.), oxidizing molecules (hydrogen peroxide, ozone, etc.), microwaves, ultraviolet light, etc. The process of treating water by the plasma technology comprises various types of oxidation in advanced oxidation, such as ozone oxidation, ultraviolet light concerted catalysis oxidation, pyrolysis and the like, and is an environment-friendly water treatment technology with high comprehensive applicability.
Dielectric Barrier Discharge (DBD) is a form of discharge in which at least one electrode between two discharge electrodes is covered by a non-conductive insulating medium or an insulating medium is directly inserted into a discharge space. The atmospheric pressure discharge low-temperature plasma jet can blow out plasma generated in a discharge space out of an ionization region by utilizing air flow on the basis of DBD discharge, so that the flexibility of the plasma treatment process is improved. Chinese patent publication No. CN110844975 discloses a plasma-based water treatment method, which combines aeration, plasma and two catalyst technologies to perform water treatment, but the area for outputting plasma is limited by the specification of an aeration pipe, so that large-area stable jet plasma cannot be supplied, and the requirement for rapid large-area treatment of sewage is difficult to meet.
Disclosure of Invention
The invention aims to provide a water treatment device and method based on plasma, aiming at the defects in the prior art, the device and method are characterized in that a plurality of outlet ends are arranged to be connected into a gas discharge channel, active particles in the gas discharge channel are effectively led out by utilizing a grounding electrode surrounding the outlet ends, the action area of the active particles after being output is increased, and the treatment efficiency of plasma jet is effectively improved by designing the plurality of outlet ends.
The invention provides a water treatment device based on plasma, which adopts the following scheme: the plasma discharge device comprises a discharge electrode and a grounding electrode, wherein the discharge electrode is sequentially wrapped by a first insulating layer and a second insulating layer, a gas discharge channel is formed between the first insulating layer and the second insulating layer, the gas discharge channel is provided with a gas inlet used for being connected with a gas source, the gas discharge channel is communicated with a plurality of outlet ends, and the grounding electrode is encircled outside the outlet end of each gas discharge channel so as to lead out plasma in the gas discharge channel from the outlet ends.
Furthermore, the discharge electrode comprises a plate-shaped first polar plate, all outlet ends are positioned on the same side of the plane of the first polar plate, and the outlet ends are arranged at intervals.
Furthermore, the discharge electrode also comprises a second rod-shaped polar plate, the end part of the second polar plate is connected with one side of the first polar plate far away from the outlet end, and the air inlet is positioned on one side of the axis of the second polar plate.
Further, all outlet ends are arranged along a plane which is parallel to and spaced from the plane of the first plate.
Furthermore, the device also comprises a container, the container is provided with a cover body, the discharge electrode is arranged on the cover body, and the terminal of the discharge electrode is led out of the container through the cover body.
Furthermore, the outlet end is in butt joint with an outlet pipe, and the grounding electrode surrounds the outside of the outlet pipe and guides plasma in the gas discharge channel to form jet flow input.
Furthermore, the air inlet is connected to an external air source through an air pipe, and the air inlet is matched with an air flowmeter.
Further, each outlet end is respectively connected with a bubbler in a butt joint mode.
A second object of the present invention is to provide a water treatment method using a plasma-based water treatment apparatus, comprising:
the discharge electrode is connected with a power supply, the grounding electrode is grounded, and the gas inlet is connected with an external gas source to supply raw material gas into the gas discharge channel;
the discharge electrode acts on gas in the gas discharge channel to form plasma, and active particles in the plasma are output through the outlet end under the guidance of the grounding electrode and act on the water body to be treated.
Further, the outlet end is connected to a bubbler, bubbles wrapping active particles are output by the bubbler, and the bubbles are diffused and dissolved in the water body to be treated to act;
or the like, or a combination thereof,
the outlet end and the liquid level of the water body to be treated are arranged at intervals, and active particles generated by discharging are guided by the outlet end to be sprayed to the liquid level and act on the water body to be treated.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) Aiming at the problem that the treatment efficiency is lower due to the fact that large-area stable jet plasma cannot be supplied, the gas discharge channel is connected to a plurality of outlet ends, active particles in the gas discharge channel are effectively led out by the aid of the grounding electrodes surrounding the outlet ends, the action area of the active particles after being output is increased, and the treatment efficiency of the plasma jet is effectively improved by the aid of the design of the outlet ends.
(2) The bubbling is combined with the DBD structure, so that the gas-liquid mass transfer efficiency of the plasma active particles is increased, and the active oxidation effect of the plasma water treatment is enhanced.
(3) The plasma jet flow is combined to effectively lead out ions and the advantages of uniform discharge of dielectric barrier discharge for water treatment, the disc-shaped first electrode is designed to increase the discharge area, and the problem of low efficiency of the plasma jet flow is effectively solved by the design of a plurality of jet flow outlet ends.
(4) The outlet end is provided with the bubbler or is arranged with the liquid level at intervals, so that the device is suitable for a mode of processing above the liquid level and deep into the liquid, the application scene is wider, and the activity of the generated plasma activated water is higher.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a plasma-based water treatment apparatus in embodiments 1 and 2 of the present invention.
Fig. 2 is a schematic view of a bubbler in examples 1 and 2 of the present invention.
Fig. 3 is a schematic view showing the operation of the plasma-based water treatment apparatus in examples 1 and 2 of the present invention.
Fig. 4 is a schematic view of the outlet end of the water body to be treated positioned above the liquid level in the embodiments 1 and 2 of the invention.
The device comprises a discharge electrode 1, a second polar plate 2, a cover 3, a container 4, an outlet end 5, a grounding electrode 6, a bubbler 7, a first polar plate 8 and an air inlet 9.
Detailed Description
Example 1
In one exemplary embodiment of the present invention, a plasma-based water treatment device is provided, as shown in fig. 1-4.
The atmospheric pressure discharge low-temperature plasma jet can blow out plasma generated in a discharge space out of an ionization region by utilizing air flow on the basis of DBD discharge, so that the flexibility of the plasma processing process is improved, and the application field is wide. The existing water treatment method based on plasma carries out water treatment by combining aeration, plasma and two catalyst technologies, but the area for outputting the plasma is limited by the specification of an aeration pipe, so that the large-area stable jet plasma cannot be supplied, and the requirement for carrying out the rapid large-area treatment on sewage is difficult to meet.
Based on this, in the present embodiment, a plasma-based water treatment apparatus is provided, in which a plurality of outlet ports 5 are arranged to access a gas discharge channel, active particles in the gas discharge channel are effectively extracted by using a grounding electrode 6 surrounding the outlet ports 5, so as to increase an active area after the active particles are output, and the plurality of outlet ports 5 are designed to effectively increase the treatment efficiency of plasma jet.
The following describes a plasma-based water treatment apparatus according to the present embodiment with reference to the drawings.
Referring to fig. 1, the plasma-based water treatment apparatus mainly includes three parts, a DBD reactor, a bubbler 7, and a reaction vessel 4, respectively.
The DBD reactor comprises electrode and insulating medium, and the electrode divide into discharge electrode 1 and telluric electricity field 6, and insulating medium includes first insulating layer and second insulating layer, and insulating medium can adopt quartz glass, and the first quartz glass layer of corresponding formation and second quartz glass layer, in other embodiments, can adjust the material of first insulating layer, second insulating layer according to the demand, adopt other insulating medium that can satisfy the demand.
With reference to fig. 1 and 4, the discharge electrode 1 is sequentially wrapped by a first insulating layer and a second insulating layer to form a structure including the discharge electrode 1, a first quartz glass layer and a second quartz glass layer from inside to outside, and the first quartz glass layer is located on the inner layer and can fix the discharge electrode 1 and maintain the position of the discharge electrode 1. The second quartz glass layer is located on the outermost layer and is arranged at a distance from the first quartz glass layer. A cavity is formed between the first insulating layer and the second insulating layer which are arranged at intervals, discharging occurs in the cavity, the cavity serves as a gas discharging channel, the gas discharging channel is provided with a gas inlet 9 used for being connected with a gas source, the gas discharging channel is communicated with a plurality of outlet ends 5, and the grounding electrode 6 is arranged at the position of the outlet ends 5.
In order to enable the plasma in the gas discharge channel to be smoothly output to the outside of the DBD reactor and guide the plasma to act on the water body to be treated, the grounding electrodes 6 are arranged around the outlet ends 5, the grounding electrode 6 is arranged around each outlet end 5, and a guiding effect is formed on the position of each outlet end 5 so as to guide the plasma in the gas discharge channel out of the outlet ends 5.
It should be noted that in this embodiment, referring to fig. 4, the outlet end 5 is formed in a tubular structure, and the outlet pipe may be butted at the outlet end 5, and the grounding electrode 6 surrounds the outlet pipe to guide the plasma in the gas discharge channel to form a jet input.
In order to meet the requirement of supplying stable jet plasma with a large area, the structure of the discharge electrode 1 and the distribution of the outlet end 5 are designed, and the discharge electrode 1 of the DBD reactor in this embodiment is designed to have a combined structure of a rod and a plate, so as to increase the discharge range.
Referring to fig. 1 and 4, the discharge electrode 1 includes a first plate 8 and a second plate 2. The first polar plate 8 is of a plate-shaped structure, such as a circular plate shape, a disc shape, and the like, all the outlet ends 5 are located on the same side of the plane of the first polar plate 8, and the outlet ends 5 are arranged at intervals. The second polar plate 2 is a rod-shaped structure, the end part of the second polar plate 2 is connected with one side of the first polar plate 8 far away from the outlet end 5, and the air inlet 9 is positioned on one side of the axis of the second polar plate 2.
All outlet ends 5 are arranged along a plane which is parallel to the plane of the first polar plate 8 and is arranged at intervals, and the outlet ends 5 are designed into jet orifices, so that the output efficiency of the plasma is improved.
Referring to fig. 3, taking the posture shown in fig. 3 as an example, the axis of the second plate 2 is vertical, the plane of the first plate 8 is horizontal, the plane of the first plate 8 is perpendicular to the axis of the second plate 2, and when the first plate 8 is a disc-shaped structure, the first plate 8 and the second plate are coaxially arranged. A plurality of outlet ports 5 are provided in the DBD reactor at the bottom of the second insulating layer of the outer layer, and outlet pipes are respectively provided for the outlet ports 5 to promote jet formation.
The annular electrodes positioned outside the outlet end 5 are mutually connected in series to be used as a grounding electrode 6, the purpose is to lead plasma generated by gas discharge out of a gas discharge channel, various active particles are clamped in the plasma, and after the active particles are output from the gas discharge channel through the outlet end 5, the active particles can be directly sprayed on the surface of liquid to be treated or enter the liquid in a bubble form through a bubbler 7, wherein the bubbler 7 is shown in figure 2.
As shown in fig. 1, 3 and 4, the DBD reactor may be directly mounted on a container 4, the container 4 may be provided with a cover 3, the discharge electrode 1 may be mounted on the cover 3, and a terminal of the discharge electrode 1 may be led out of the container 4 through the cover 3.
It can be understood that the second polar plate 2 of the discharge electrode 1 in the DBD reactor is a high-voltage electrode bar, the second polar plate 2 is connected with a power supply system, the air inlet 9 is connected with an external air source through an air pipe, meanwhile, the air source can be provided with an air control system, the air source can select an air bottle and the like, and the air flow meter is arranged on the air pipe to control the flow rate of air.
When the plasma treatment device works, a high-voltage alternating current source is used as a power supply, the discharge electrode 1 is connected, gases such as argon, helium and air are used as gas raw materials, plasmas are generated through discharge of the DBD reactor, active particles such as hydrogen peroxide, hydroxyl free radicals, ozone and nitrate ions with oxidizability act on a treatment solution to form plasma activated water, and the solution is subjected to oxidative degradation treatment.
Example 2
In another exemplary embodiment of the present invention, as shown in fig. 1 to 4, a water treatment method of a plasma-based water treatment apparatus is provided.
The water treatment method of the water treatment device based on the plasma comprises the following steps:
the discharge electrode 1 is connected with a power supply, the grounding electrode 6 is grounded, and the gas inlet 9 is connected with an external gas source to supply raw material gas into the gas discharge channel;
the discharge electrode 1 acts on the gas in the gas discharge channel to form plasma, and active particles in the plasma are output through the outlet end 5 under the guidance of the grounding electrode 6 and act on the water body to be treated.
For different treatment requirements, the plasma output by the outlet end 5 can be directly sprayed to the liquid level of the water body to be treated, and the outlet end 5 can also be connected to the bubbler 7 to enter the water body to be treated in a bubble form and gradually diffuse.
As shown in fig. 3, the outlet end 5 is connected to a bubbler 7, the bubbler 7 outputs bubbles wrapping active particles, and the bubbles are diffused and dissolved in the water body to be treated to act; as shown in fig. 4, the outlet end 5 is arranged at an interval from the liquid level of the water body to be treated, and the active particles generated by the discharge are guided by the outlet end 5 to be sprayed to the liquid level and act on the water body to be treated.
The above-mentioned water treatment method will be described in detail with reference to example 1.
The method comprises the following steps: the bubbler 7 and the outlet end 5 of the DBD reactor are assembled and connected through a rubber ring, the DBD reactor is further assembled with the cover body 3 of the reaction vessel 4, and the grounding electrode 6 outside the outlet end 5 is connected in series and grounded;
step two: the gas pipe is connected with a gas inlet 9 of the DBD reactor and is connected with a gas body to ensure the introduction of raw material gas;
step three: the target treatment solution is filled into the container 4, the assembled reactor is inserted into the solution, and the solution is covered by the cover body 3;
step four: the discharge electrode 1 is connected with a high-voltage power supply, the power supply is turned on, voltage is applied, gas starts to discharge between the first insulating layer and the second insulating layer, and simultaneously plasma generated by discharge is introduced into liquid in a bubble mode through the bubbler 7 of the jet branch pipe orifice to treat target treatment solution.
Referring to fig. 3, a target treatment solution is placed in the reaction vessel 4, and the bubbler 7, the DBD reactor, the cover 3, the gas control system, and the power supply are assembled. The outlet end 5 and the bubbler 7 are deeply inserted into the solution, mixed gas of argon and oxygen is introduced into the DBD reactor, and 6kV alternating voltage is applied;
and discharging is carried out between the first insulating layer and the second insulating layer of the DBD reactor, active particles generated by the discharging are introduced into the bubbler 7 along with air flow, bubbles containing plasma active particles are blown out of air holes of the bubbler 7, and the bubbles are continuously diffused and dissolved in the solution to form plasma activated water with strong oxidizing property, so that the solution is treated.
Referring to fig. 4, a target treatment solution is placed in a reaction vessel 4, and a DBD reactor, a cover 3, a gas control system, and a power supply are assembled. After assembly, keeping the outlet end 5 2mm above the liquid level, introducing mixed gas of argon and oxygen into the DBD reactor, and applying 6kV alternating voltage;
and discharging is carried out in the gap between the first insulating layer and the second insulating layer of the DBD reactor, and active particles generated by the discharging are sprayed to the liquid surface at the position of an outlet pipe along with the air flow in a jet mode, so that the solution is treated.
The bubbler 7 is arranged at the outlet end 5 or the outlet end 5 and the liquid level are arranged at intervals, so that the device is suitable for a mode of processing above the liquid level and deep into the liquid, the application scene is wider, and the activity of the generated plasma activated water is higher.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a water treatment facilities based on plasma, its characterized in that includes discharge electrode and telluric electricity field, wraps up first insulation layer, second insulation layer in proper order outside the discharge electrode, forms the gas discharge passageway between first insulation layer and the second insulation layer, and the gas discharge passageway is equipped with the air inlet that is used for inserting the air supply, and the gas discharge passageway intercommunication has a plurality of exit ends, and the telluric electricity field encircles outside every gas discharge passageway's exit end to draw forth the plasma in the gas discharge passageway from the exit end.
2. The plasma-based water treatment device of claim 1, wherein the discharge electrode comprises a first plate having a plate shape, all outlet ends are located on the same side of a plane of the first plate, and the outlet ends are spaced apart.
3. The plasma-based water treatment device of claim 2, wherein the discharge electrode further comprises a second plate having a rod shape, an end of the second plate is connected to a side of the first plate away from the outlet end, and the gas inlet is located on a side of an axis of the second plate.
4. The plasma-based water treatment device of claim 3, wherein all of the outlet ports are disposed along a plane that is parallel to and spaced from the plane of the first plate.
5. The plasma-based water treatment device of claim 1, further comprising a container provided with a cover, the discharge electrode being mounted on the cover, the discharge electrode terminal being led out of the container through the cover.
6. The plasma-based water treatment device of claim 1, wherein the outlet end is docked with an outlet tube, and a grounded electrode surrounds the outlet tube and directs the plasma in the gas discharge channel to form the jet input.
7. The plasma-based water treatment device of claim 1, wherein the gas inlet is connected to an external gas source through a gas pipe, the gas inlet being fitted with a gas flow meter.
8. The plasma-based water treatment device of claim 1 wherein each of said outlet ports is respectively interfaced with a bubbler.
9. A water treatment method of the plasma-based water treatment apparatus as claimed in any one of claims 1 to 8, comprising:
the discharge electrode is connected with a power supply, the grounding electrode is grounded, and the gas inlet is connected with an external gas source to supply raw material gas into the gas discharge channel;
the discharge electrode acts on gas in the gas discharge channel to form plasma, and active particles in the plasma are output through the outlet end under the guidance of the grounding electrode and act on the water body to be treated.
10. The water treatment method of a plasma-based water treatment apparatus as claimed in claim 9, wherein the outlet end is connected to a bubbler, the bubbler outputs bubbles wrapping active particles, and the bubbles are diffused and dissolved in the water body to be treated to act;
or the like, or, alternatively,
the outlet end and the liquid level of the water body to be treated are arranged at intervals, and active particles generated by discharging are guided by the outlet end to be sprayed to the liquid level and act on the water body to be treated.
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| CN202211361807.9A CN115636473A (en) | 2022-11-02 | 2022-11-02 | Water treatment device and method based on plasma |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434428A (en) * | 2008-12-03 | 2009-05-20 | 大连理工大学 | Liquid electrode surface discharge plasma reactor for water treatment |
| CN102583697A (en) * | 2012-03-15 | 2012-07-18 | 大连海事大学 | Dielectric barrier discharge water treatment device and dielectric barrier discharge water treatment method |
| CN205109651U (en) * | 2015-07-17 | 2016-03-30 | 浙江富春江环保热电股份有限公司 | A plasma discharge reactor for non - carbon back absorbent regeneration |
| KR101843661B1 (en) * | 2016-12-30 | 2018-03-29 | 한국기초과학지원연구원 | Hybrid apparatus and method for water treatment using plasma |
| KR20200025145A (en) * | 2018-08-29 | 2020-03-10 | 이석 | Dielectic barrier discharge plasma jet generating device |
| CN114890499A (en) * | 2022-06-07 | 2022-08-12 | 珠海格力电器股份有限公司 | Plasma activated water preparation device |
-
2022
- 2022-11-02 CN CN202211361807.9A patent/CN115636473A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101434428A (en) * | 2008-12-03 | 2009-05-20 | 大连理工大学 | Liquid electrode surface discharge plasma reactor for water treatment |
| CN102583697A (en) * | 2012-03-15 | 2012-07-18 | 大连海事大学 | Dielectric barrier discharge water treatment device and dielectric barrier discharge water treatment method |
| CN205109651U (en) * | 2015-07-17 | 2016-03-30 | 浙江富春江环保热电股份有限公司 | A plasma discharge reactor for non - carbon back absorbent regeneration |
| KR101843661B1 (en) * | 2016-12-30 | 2018-03-29 | 한국기초과학지원연구원 | Hybrid apparatus and method for water treatment using plasma |
| KR20200025145A (en) * | 2018-08-29 | 2020-03-10 | 이석 | Dielectic barrier discharge plasma jet generating device |
| CN114890499A (en) * | 2022-06-07 | 2022-08-12 | 珠海格力电器股份有限公司 | Plasma activated water preparation device |
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