CN116903096A - Gas-liquid mixed-phase double-dielectric barrier discharge water treatment device and method - Google Patents
Gas-liquid mixed-phase double-dielectric barrier discharge water treatment device and method Download PDFInfo
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- CN116903096A CN116903096A CN202310827137.3A CN202310827137A CN116903096A CN 116903096 A CN116903096 A CN 116903096A CN 202310827137 A CN202310827137 A CN 202310827137A CN 116903096 A CN116903096 A CN 116903096A
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- Prior art keywords
- gas
- medium pipe
- electrode
- voltage
- barrier discharge
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- 239000007788 liquid Substances 0.000 title claims abstract description 36
- 230000004888 barrier function Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 5
- 238000005273 aeration Methods 0.000 claims abstract description 24
- 239000002351 wastewater Substances 0.000 claims abstract description 17
- 230000000593 degrading effect Effects 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 2
- 238000012806 monitoring device Methods 0.000 claims 2
- 239000003989 dielectric material Substances 0.000 claims 1
- 239000013543 active substance Substances 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 10
- 239000002699 waste material Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000005276 aerator Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/4608—Treatment of water, waste water, or sewage by electrochemical methods using electrical discharges
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Abstract
The patent discloses a device and a method for degrading wastewater by gas-liquid mixed phase double-dielectric barrier discharge, wherein the device comprises a reactor, a high-voltage alternating current power supply, a flow controller and a gas generator; the reactor comprises an electrode, an inner medium pipe, an outer medium pipe and an aeration device; the electrode comprises a high-voltage electrode and a grounding electrode; the inner medium tube is sleeved outside the high-voltage electrode, and the gap between the inner medium tube and the high-voltage electrode is a gas discharge area; a liquid storage area is arranged between the inner medium pipe and the outer medium pipe; the grounding electrode is uniformly wound outside the outer medium pipe; the aeration device comprises a check valve and an aeration head, the check valve is positioned at the outlet of the inner medium pipe, and the aeration head is positioned at the outlet of the check valve; the device is characterized in that gas enters a gas discharge area from a flow controller to generate active substances, and the active substances enter a liquid discharge area for degradation through an aeration device. The invention has the advantages of simple structure, small space, high energy utilization rate, low electrode corrosion rate and the like.
Description
Technical Field
The invention relates to the field of plasma discharge for wastewater treatment, in particular to a reaction device and a method for degrading wastewater by utilizing gas-liquid two-phase discharge to generate active substances.
Background
Water pollution is a non-negligible civil problem and has seriously affected the physical health of people. Wherein the dye wastewater belongs to industrial wasteThe typical organic wastewater difficult to degrade in water is characterized by deep chromaticity, complex components, certain toxicity and certain toxic heavy metals. The low-temperature plasma technology has the advantages of stable discharge, mild condition, high degradation efficiency and the like, and can efficiently remove organic pollutants difficult to degrade in the water body, so that the low-temperature plasma technology is widely applied to the field of dye wastewater degradation and has good industrial application prospect. Dielectric Barrier Discharge (DBD), also known as silent discharge, can generate O in atmospheric discharge 3 Active particles such as O, and the like, and the active particles can form H with water at gas-liquid junction 2 O 2 Strong oxides such as OH, which rapidly oxidize dye molecules in solution, thereby achieving the purpose of degrading wastewater, so that the plasma discharge device is widely applied to the field of wastewater treatment. At present, the DBD device generally has the problems of low discharge efficiency, low gas-liquid mass transfer efficiency and the like.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a gas-liquid mixed-phase double-dielectric barrier discharge reaction device which can realize simultaneous discharge of gas phase and liquid phase, can obviously increase the contact area of active substances and target molecules and can reduce the temperature of a reactor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the gas-liquid mixed phase double-medium barrier discharge device mainly comprises three aspects of an electrode, an insulating medium and an aeration device; the high-voltage electrode is positioned on the axis of the inner medium tube, the inner medium tube is sleeved inside the outer medium tube, the grounding electrode is tightly wound on the outer wall of the outer medium tube, the aerator is positioned at the tail end of the inner medium tube, an inner gap between the inner medium tube and the high-voltage electrode is used for introducing gas, an outer gap between the outer medium tube and the inner medium tube is used for containing wastewater, the liquid is separated from the gas by the aerator, the gas enters an inner gap discharge area from the air inlet, is blown into the wastewater by the aerator, passes through the outer gap discharge area and finally flows out of the air outlet.
The cylinder body is cylindrical, and the high-voltage electrode is fixed at the middle position of the device shaft.
The high-voltage electrode material is a metal rod.
The ground electrode material is metal foil or metal mesh.
The aeration device comprises a check valve and a microporous aeration head, wherein the check valve is connected to the tail end of the inner medium pipe, and the microporous aeration head is connected to the outlet of the check valve.
The medium pipes are made of medium materials such as quartz, glass and the like.
The invention provides a gas-liquid mixed phase double-dielectric barrier discharge reaction device, which has the advantages that:
1. the aerating device composed of the check valve and the microporous aerating head prevents liquid from flowing backwards into the inner medium pipe, so that the high-voltage electrode is isolated from waste liquid, the pollution of the waste liquid to the high-voltage electrode is avoided, and the high-voltage electrode can stably run for a long time. The design can ionize gas and liquid phase discharge simultaneously, generate a large amount of gas active substances and generate a large amount of high-energy particles in waste liquid at the same time, so that the space can be utilized most efficiently.
2. Because active substances such as OH exist in the solution for a very short time, the active substances only can act on a small part of wastewater on the gas-liquid contact surface, and the active substances have no obvious effect on wastewater far away from the contact surface. This patent has increased the area of contact of gas-liquid through a large amount of microbubbles that micropore aeration head produced, through the drive effect of bubble simultaneously, and the waste water in the reaction unit carries out irregular motion, has increased the probability that organic dyestuff collided with the active material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly introduce examples or drawings that are required to be used in the description of the prior art.
Fig. 1 is a diagram showing a structure of a gas-liquid mixed phase double dielectric barrier discharge device according to the present invention.
Fig. 2 is a partial sectional view of a gas-liquid mixed phase double dielectric barrier discharge device according to the present invention.
In the figure: 1. high-voltage electrode, 2, ground electrode, 3, outer medium pipe, 4, inner medium pipe, 5, gas inlet, 6, gas outlet, 7, check valve, 8, aeration head, 9, fixing and sealing material, 10, waste liquid area, 11, gas channel, 12, gas discharge area, 13, liquid discharge area.
Description of the preferred embodiments
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention.
Referring to fig. 1 and 2, the gas-liquid mixed phase double-dielectric barrier discharge device comprises a high-voltage electrode (1), a ground electrode (2), an outer dielectric tube (3), an inner dielectric tube (4), a gas inlet (5), a gas outlet (6), a non-return valve (7), an aeration head (8), a fixing and sealing material (9), a waste liquid area (10), a gas channel (11), a gas discharge area (12) and a liquid discharge area (13).
As shown in fig. 1 and 2, a structure diagram of a gas-liquid mixed phase double-dielectric barrier discharge device is shown, wherein the outer shell of the device is a cylinder, the inside of the cylinder is divided into two areas by an inner dielectric tube, and a high-voltage electrode, an inner dielectric tube, an outer dielectric tube and a ground electrode are respectively arranged from inside to outside; the aeration device is positioned at the tail end of the inner medium pipe, an inner gap between the inner medium pipe and the high-voltage electrode is used for introducing gas, an outer gap between the outer medium pipe and the inner medium pipe is used for containing wastewater, the liquid is separated from the gas by the aeration device, the gas enters an inner gap discharge area from the air inlet, is blown into the wastewater through the aeration device, passes through the outer gap discharge area and finally flows out of the air outlet.
The cylinder body is cylindrical; the high-voltage electrode is a copper rod or a stainless steel rod, the grounding electrode is a copper foil or a copper net, the grounding electrode is positioned at the upper end of the check valve and is tightly wound on the outer wall side of the outer medium pipe.
The aeration device consists of a titanium steel microporous aeration head and a check valve; the non-return valve is positioned at the tail end of the inner medium pipe, the titanium steel microporous aeration head is positioned at the outlet of the non-return valve, and the connecting parts are all made of insulating materials.
The gas inlet is positioned in the inner medium pipe, and the gas outlet is positioned in the outer medium pipe.
The medium pipe material is a medium material such as quartz, glass and the like.
The fixing and sealing are made of insulating materials.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, within the scope of the present invention, should be covered by the protection scope of the present invention if the technical scheme and the inventive concept are equivalent or changed.
Claims (7)
1. The device for degrading the wastewater by using the gas-liquid mixed phase plasma is characterized by comprising the following components: a reactor, a high-voltage alternating current power supply, a gas generator and a flow controller.
The reactor is a gas-liquid mixed phase double-medium barrier discharge device and is characterized in that the device is a coaxial cylinder, the inside of the cylinder is divided into two areas by an inner medium pipe, and a high-voltage electrode, an inner medium pipe, an outer medium pipe and a ground electrode are respectively arranged from inside to outside; the aeration device is positioned at the tail end of the inner medium pipe, an inner gap between the inner medium pipe and the high-voltage electrode is used for introducing gas, an outer gap between the outer medium pipe and the inner medium pipe is used for containing wastewater, the liquid is separated from the gas by the aeration device, the gas enters an inner gap discharge area from the air inlet, is blown into the wastewater through the aeration device, passes through the outer gap discharge area and finally flows out of the air outlet.
2. The gas-liquid miscible double-dielectric barrier discharge apparatus as claimed in claim 1, wherein said cylinder is cylindrical; the high-voltage electrode is a metal rod, the grounding electrode is a metal foil or a metal net, and the grounding electrode is tightly wound on the outer wall side of the outer medium tube.
3. The gas-liquid mixed phase double-medium barrier discharge device as claimed in claim 1, wherein the aeration device comprises a microporous aeration head and a check valve; the check valve is positioned at the tail end of the inner medium pipe, and the microporous aeration head is positioned at the outlet of the check valve.
4. The gas-liquid mixed phase double dielectric barrier discharge apparatus as claimed in claim 1, wherein the gas inlet is located in the inner dielectric tube and the gas outlet is located in the outer dielectric tube.
5. The gas-liquid mixed phase double-dielectric barrier discharge device as claimed in claim 1, wherein the dielectric tube is made of quartz, glass or other dielectric materials.
6. The device for degrading wastewater by using gas-liquid mixed phase plasma according to claim 1, wherein the frequency of the high-voltage alternating current power supply is 0-20kHz, and the voltage of the high-voltage alternating current power supply is 1-60kV.
7. A method for wastewater treatment by using the gas-liquid miscible double-dielectric barrier discharge device as claimed in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
step 1, sequentially communicating a gas generator with a flow controller and a reactor through pipelines, and checking the air tightness of the device; the high-voltage alternating current power supply is connected with the high-voltage electrode and the ground electrode of the reactor, and a voltage and current monitoring device is arranged.
And 2, generating gas through a gas generator, controlling the flow rate by a flow controller, injecting gas with a certain flow rate into the reactor, and adjusting a high-voltage alternating current power supply to generate low-temperature plasma according to the voltage and current monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310827137.3A CN116903096A (en) | 2023-07-06 | 2023-07-06 | Gas-liquid mixed-phase double-dielectric barrier discharge water treatment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310827137.3A CN116903096A (en) | 2023-07-06 | 2023-07-06 | Gas-liquid mixed-phase double-dielectric barrier discharge water treatment device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116903096A true CN116903096A (en) | 2023-10-20 |
Family
ID=88364075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310827137.3A Pending CN116903096A (en) | 2023-07-06 | 2023-07-06 | Gas-liquid mixed-phase double-dielectric barrier discharge water treatment device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116903096A (en) |
-
2023
- 2023-07-06 CN CN202310827137.3A patent/CN116903096A/en active Pending
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