CN115594257A - Discharge nitrogen fixation device and method - Google Patents
Discharge nitrogen fixation device and method Download PDFInfo
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- CN115594257A CN115594257A CN202211307223.3A CN202211307223A CN115594257A CN 115594257 A CN115594257 A CN 115594257A CN 202211307223 A CN202211307223 A CN 202211307223A CN 115594257 A CN115594257 A CN 115594257A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000001994 activation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 nitrate ions Chemical class 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000007845 reactive nitrogen species Substances 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000000678 plasma activation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The application discloses a discharge nitrogen fixation device and a discharge nitrogen fixation method, and belongs to the technical field of wastewater treatment. The device comprises a reaction vessel, a discharge reactor and a bubble diffuser, wherein the discharge reactor is vertically arranged, the bottom end of the discharge reactor penetrates through the top end of the reaction vessel and is positioned in the reaction vessel, and the top end of the discharge reactor is positioned above the reaction vessel; the bubble diffuser is horizontally arranged at the bottom end of the discharge reactor and is positioned in the reaction container. The air introduced into the discharge reactor is discharged to generate plasma, the plasma enters the bubble diffuser along with the gas to form activated water with strong oxidizing property, and the activity of the plasma activated water can be increased on the basis of generating the activated water; solves the problem of low activity of the activated water prepared by the discharge nitrogen fixation device in the prior art.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to a discharge nitrogen fixation device and a discharge nitrogen fixation method.
Background
The statements herein merely provide background information related to the present application and may not necessarily constitute prior art.
The atmospheric pressure low temperature plasma is used as a novel molecular activation means, and relates to a plurality of subjects such as plasma physical chemistry, biomedicine, material science and engineering, environment science and engineering, energy and power engineering and the like. Can generate a large amount of high-energy electrons, ions and excited free radical high-activity particles, is accompanied by physical processes such as electricity, light, heat and the like, and special physical and chemical processes such as sound, light, electricity and the like, and can carry out material preparation and modification under the condition of process parameters which cannot be reached by the traditional method.
Electrons, atoms, molecules and free radicals with high activity generated by gas discharge collide and react with organic and inorganic pollutant molecules in various water bodies, so that the molecular bonds of the pollutants are broken to form low-toxicity or non-toxic micromolecular compounds. The Reactive Nitrogen Species (RNS) is generated by air discharge, and the low-temperature plasma assisted nitrogen fixation technology takes air as a basic raw material, has the advantages of easily available raw materials, wide applicability and no secondary pollution, and has very wide application prospect in the field of water treatment. Dielectric Barrier Discharge (DBD) is a form of discharge in which an insulating Dielectric is inserted into a discharge space, also called silent discharge. The DBD electrode structure mainly comprises a coaxial type, a parallel flat plate type and a pin plate type, an insulating medium can cover the surface of an electrode and can also be suspended in a discharge area, although the electrode structures are different, the discharge mechanism is consistent.
On one hand, the discharge nitrogen fixation device applied to wastewater treatment in the prior art has a complex structure and cannot be applied to plasma activated water production under the conditions of miniaturization, distribution and the like; on the other hand, in the discharge nitrogen fixation method based on the discharge nitrogen fixation device in the prior art, the retention time of the particles such as nitrate, nitrite and the like generated by discharge in water is too short, the mixing effect with water is not uniform, active nitrogen substances cannot be well fixed and utilized, and the activity of the prepared activated water is not high, so that the production requirement of practical application cannot be met.
Disclosure of Invention
In view of the disadvantages of the prior art, an object of the embodiments of the present application is to provide a discharge nitrogen fixation device and method, which utilize air as a gas raw material to perform a discharge reaction at normal temperature and normal pressure to generate plasma including high-energy electrons, nitrate ions, nitrite ions, and other particles, and introduce the plasma into water in the form of bubbles under the action of a bubble diffuser to form activated water with strong oxidation property.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
an electric discharge nitrogen fixation device, comprising:
a reaction vessel for the reaction of the organic acid with the organic acid,
the discharge reactor is vertically arranged, the bottom end of the discharge reactor penetrates through the top end of the reaction container and is positioned in the reaction container, and the top end of the discharge reactor is positioned above the reaction container; and the number of the first and second groups,
and the bubble diffuser is horizontally arranged at the bottom end of the discharge reactor and positioned in the reaction container.
Further, the side wall of the reaction vessel is of a wave structure;
the top end of the reaction container is provided with an opening, the opening is provided with a container cover, and the container cover is provided with an exhaust hole.
Further, the discharge reactor comprises a medium pipe, a high-voltage electrode and a stainless steel net;
the medium pipe is vertically arranged, the bottom end of the medium pipe penetrates through the top end of the reaction container and is positioned in the reaction container, and the top end of the coaxial medium pipe is positioned above the reaction container;
the high-voltage electrode is vertically arranged in the medium tube;
the stainless steel net surrounds the medium pipe and is arranged on the periphery of the medium pipe, and the stainless steel net is coaxial with the medium pipe.
Preferably, the medium pipe is a double-layer quartz glass pipe.
Further, the bubble diffuser comprises a diffuser body, a bearing and a vane, and the number of the vane is 4;
the middle part of the diffuser body is embedded into the bearing, and the middle part of the diffuser body is connected with the discharge reactor through the bearing;
the blade interval evenly set up horizontally in the week side of diffuser main part, the diffuser main part with inside link up of blade.
Preferably, the side surface of the blade is provided with an air hole.
Preferably, the bottom end of the reactor is provided with a rubber ring, and the diffuser body is connected with the bottom end of the reactor through the bearing and the rubber ring.
The embodiment of the application also provides a using method based on the discharge nitrogen fixation device, which comprises the following steps:
putting water or wastewater to be treated in a reaction container, connecting a gas cylinder, introducing gas required by discharge, and connecting a discharge reactor with a high-frequency alternating-current power supply;
and applying voltage to the discharge reactor, enabling plasma generated by discharge to cooperate with gas to enter the bubble diffuser, continuously blowing bubbles out of the bubble diffuser and rotating the bubble diffuser so as to enable active particles to be introduced into water, and discharging the separated gas through the exhaust hole.
Further, the gas cylinder and the gas inlet hole at the top end of the medium pipe are communicated, and the high-voltage electrode is connected with a high-frequency alternating current power supply.
Further, the gas required for the discharge is air.
Further, the gas flow rate and flow rate is 300-2000 SCCM.
Further, voltage is applied to the high-voltage electrode, the inside of the medium tube appears, and plasma generated by discharge cooperates with gas to enter the bubble diffuser along the medium tube;
further, the discharge voltage is 5kV to 18kV.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages:
1. based on the actual effect requirement in the wastewater treatment process, the plasma activated water generation device which is provided by the application and has the advantages of large treatment capacity and easy circulation and is formed by combining the coaxial DBD structure and the bubble diffuser introduces active particles generated by DBD discharge into water in a bubble form to form activated water with certain oxidizability, so that direct and effective degradation treatment of a large amount of solution is realized;
2. the discharge nitrogen fixation device is simple in structure, small in size, capable of realizing miniaturization and distributed plasma activated water production, high in reaction speed and high in energy efficiency;
3. the application provides a solid nitrogen device discharges, the air passes through the rotatory aquatic that lets in of bubble diffuser with the form of bubble, and plus wave type reaction vessel blocks that the bubble directly rises, increases bubble and water contact time, has increased active particle and water action time to the active particle in the hydrone that makes the activation and the plasma can mix the activity that promotes plasma activation water better.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural diagram provided in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view provided by an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a bubble diffuser provided in an embodiment of the present application;
in the figure: 1. an air inlet; 2. a high voltage electrode; 3. a container lid; 4. a stainless steel mesh; 5. a medium pipe; 6. a diffuser body; 7. a reaction vessel; 8. a diffuser body; 9. a bearing; 10. air holes; 11. a blade.
The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the application expressly states otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the application and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in this application are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; the term "coupled" may refer to a mechanical connection, a direct connection, an indirect connection through an intermediary, an internal connection between two elements, or an interaction between two elements, and the term is used in this application to refer to a specific meaning as one of ordinary skill in the art would understand.
Example one
As described in the background art, the activated water produced by the discharge nitrogen fixation device in the prior art has low activity and is difficult to be applied to the treatment of wastewater in various scenes.
With reference to fig. 1-3, the discharge nitrogen fixation device comprises a reaction vessel 7, a discharge reactor and a bubble diffuser 6, wherein the side wall of the reaction vessel 7 is of a wave structure, and can prevent bubbles from directly rising, increase the contact time of the bubbles and water, and increase the action time of active particles and water, the top end of the reaction vessel 7 is open, a vessel cover 3 is installed at the opening, and the circumferential side of the vessel cover 3 is provided with an exhaust hole communicated with the interior of the reaction vessel 7; the discharge reactor comprises a medium pipe 5, a high voltage electrode 2 and a stainless steel mesh 4, and the bubble diffuser 6 comprises a diffuser body 8, a bearing 9 and a vane 11.
The discharge reactor is of a coaxial DBD structure, an insulating medium is a medium tube 5, the medium tube 5 is vertically arranged, the bottom end of the medium tube 5 penetrates through a container cover 3 of a reaction container 7 and is positioned inside the reaction container 7, and the top end of the medium tube 5 is positioned above the reaction container 7 and is provided with an air inlet 1; the high-voltage electrode 2 is vertically arranged in the medium pipe 5; the stainless steel net 4 is a grounding electrode, the stainless steel net 4 surrounds the medium pipe 5 and is attached to the periphery of the medium pipe 5, the stainless steel net 4 is coaxial with the medium pipe 5, and plasma is generated in the area covered by the stainless steel net 4.
The bottom end of the discharge reactor is provided with a rubber ring, the rubber ring is sleeved at the bottom end of the discharge reactor, the middle part of the diffuser main body 8 is embedded into the bearing 9, the bearing 9 is sleeved on the rubber ring, the middle part of the diffuser main body 8 is rotatably connected with the discharge reactor through the bearing 9 and the rubber ring and can rotate along the axis of the discharge reactor, and the bubble diffuser 6 is connected to the bottom of the discharge reactor and can rotate at the same time; the number of the blades 11 is 4, the blades are uniformly and horizontally arranged on the circumferential side of the diffuser main body 8 at intervals, and the diffuser main body 8 is communicated with the insides of the blades 11 to ensure that the bubble diffuser 6 rotates under the action of air flow; the blades 11 are respectively provided with air holes 10 at one side along the length direction of the blades 11, in the embodiment, each blade 11 is provided with 17 air holes 10, the air holes 10 are uniformly distributed and horizontally arranged, the diameter of each air hole 10 is 0.5mm, and the distance between the air holes 10 is 2mm.
In the embodiment, the medium tube 5 is a double-layer quartz glass tube, the outer diameters of the medium tube are 6mm and 13mm respectively, the length of the medium tube is 200mm, the wall thickness of the medium tube is 1.5mm, and the discharge gap is 2mm; the high-voltage electrode 2 is a stainless steel high-voltage electrode rod with the diameter of 3mm.
When the double-layer quartz glass tube is used, the air inlet of the double-layer quartz glass tube is connected with the air bottle, and the high-voltage electrode rod is connected with the high-frequency alternating-current power supply necklace and the stainless steel mesh 4 through the connecting wire to be grounded.
Example two
The embodiment provides a using method of a discharge nitrogen fixation device, which comprises the following steps:
step 1: putting water or wastewater to be treated into a reaction container 7, connecting a gas cylinder, introducing air, and connecting a discharge reactor with a high-frequency alternating-current power supply; specifically, a gas cylinder is introduced into an air inlet hole 1 at the top end of a medium pipe 5, and a high-voltage electrode 2 is connected with a high-frequency alternating current power supply, so that the gas circuit is ensured to be communicated with a circuit; the gas required by the discharge is air, and the flow rate of the gas are 300-2000 SCCM;
step 2: applying voltage to the discharge reactor, enabling plasma generated by discharge to cooperate with air to enter the air bubble diffuser 6, continuously blowing air bubbles out of the air bubble diffuser 6 and rotating under the action of air flow so as to enable active particles to be introduced into water, and discharging separated air through the exhaust hole; specifically, when voltage is applied to the high-voltage electrode 2, the plasma generated by discharge appears inside the dielectric tube 5, and the plasma cooperates with gas to enter the bubble diffuser 6 along the dielectric tube 5, and the discharge voltage is 5kV-18kV.
Illustratively, pure water is injected into the reaction vessel 7 to a level higher than that of the bubble diffuser 6, air is introduced through an air inlet at the upper end of the medium tube 5, the gas flow rate is controlled at 400SCCM, the high-voltage electrode rod is connected with a high-frequency alternating current source, 10kV voltage is applied, and the gas discharges between the insulating media. The active particles generated by the discharge are carried into the bubble diffuser 6 by flowing gas, and are introduced into the water through the side air holes 10 of the diffuser, and the diffuser rotates under the action of the gas flow to generate plasma activated water with strong oxidizing property.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. An electric discharge nitrogen fixation device, comprising:
a reaction vessel, a reaction device and a reaction device,
the discharge reactor is vertically arranged, the bottom end of the discharge reactor penetrates through the top end of the reaction container and is positioned in the reaction container, and the top end of the discharge reactor is positioned above the reaction container; and the number of the first and second groups,
and the bubble diffuser is horizontally arranged at the bottom end of the discharge reactor and positioned in the reaction container.
2. The discharge nitrogen fixation device as claimed in claim 1, wherein the side wall of the reaction vessel is of a wave structure;
the top end of the reaction container is provided with an opening, the opening is provided with a container cover, and the container cover is provided with an exhaust hole.
3. The discharge nitrogen fixation device of claim 1, wherein the discharge reactor comprises a medium tube, a high voltage electrode and a stainless steel mesh;
the medium pipe is vertically arranged, the bottom end of the medium pipe penetrates through the top end of the reaction container and is positioned in the reaction container, and the top end of the coaxial medium pipe is positioned above the reaction container;
the high-voltage electrode is vertically arranged in the medium tube;
the stainless steel net surrounds the medium pipe and is arranged on the periphery of the medium pipe, and the stainless steel net is coaxial with the medium pipe.
4. The discharge nitrogen fixation device of claim 3, wherein the medium tube is a double-layer quartz glass tube.
5. The discharged nitrogen fixation device of claim 1, wherein the bubble diffuser comprises a diffuser body, a bearing and a vane, the number of the vane is 4;
the middle part of the diffuser main body is embedded into the bearing, and the middle part of the diffuser main body is connected with the discharge reactor through the bearing;
the blade interval evenly set up horizontally in the week side of diffuser main part, the diffuser main part with inside the lining up of blade.
6. The discharge nitrogen fixation device as recited in claim 5, wherein the side surface of the blade is provided with air holes.
7. The discharged nitrogen fixation device of claim 5, wherein a rubber ring is provided at a bottom end of the reactor, and the diffuser body is connected to the bottom end of the reactor through the bearing and the rubber ring.
8. The use method of the discharge nitrogen fixation device based on any one of claims 1 to 7 is characterized by comprising the following steps:
putting water or wastewater to be treated in a reaction container, connecting a gas cylinder, introducing gas required by discharge, and connecting a discharge reactor with a high-frequency alternating current power supply;
and applying voltage to the discharge reactor, enabling plasma generated by discharge to cooperate with gas to enter a bubble diffuser, continuously blowing bubbles out of the bubble diffuser and rotating to enable active particles to be introduced into water, and discharging the separated gas through an exhaust hole.
9. The use method of claim 8, wherein the gas cylinder is introduced into a gas inlet hole at the top end of the medium pipe, and the high-voltage electrode is connected with a high-frequency alternating current power supply;
further, the gas required by the discharge is air;
further, the gas flow rate and flow rate is 300-2000 SCCM.
10. The use method as claimed in claim 8, wherein, when a voltage is applied to the high voltage electrode, the medium tube is internally provided, and plasma generated by the discharge enters the bubble diffuser along the medium tube in cooperation with gas;
further, the discharge voltage is 5kV-18kV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211307223.3A CN115594257A (en) | 2022-10-24 | 2022-10-24 | Discharge nitrogen fixation device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211307223.3A CN115594257A (en) | 2022-10-24 | 2022-10-24 | Discharge nitrogen fixation device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116969552A (en) * | 2023-09-21 | 2023-10-31 | 贵州勘设生态环境科技有限公司 | Integrated sewage treatment control and regulation system and device thereof |
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