CN113545190B - Low-temperature plasma soil nitrogen fixation device - Google Patents
Low-temperature plasma soil nitrogen fixation device Download PDFInfo
- Publication number
- CN113545190B CN113545190B CN202110843883.2A CN202110843883A CN113545190B CN 113545190 B CN113545190 B CN 113545190B CN 202110843883 A CN202110843883 A CN 202110843883A CN 113545190 B CN113545190 B CN 113545190B
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- Prior art keywords
- soil
- sleeve
- quartz capsule
- base
- nitrogen fixation
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000002689 soil Substances 0.000 title claims abstract description 47
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 34
- 239000010453 quartz Substances 0.000 claims abstract description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002775 capsule Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 15
- 238000012856 packing Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910002651 NO3 Inorganic materials 0.000 abstract 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract 1
- 230000035484 reaction time Effects 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 241000208822 Lactuca Species 0.000 description 10
- 235000003228 Lactuca sativa Nutrition 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B77/00—Machines for lifting and treating soil
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a low-temperature plasma soil nitrogen fixation device, which comprises a base, an air inlet hole, a sleeve, a quartz tube, a hollow threaded electrode, an exhaust hole and a high-voltage power supply, wherein the base is composed of a lower bottom plate and an upper bottom plate, the upper bottom plate is sleeved on the top of the lower bottom plate, the side wall of the lower bottom plate is provided with the air inlet hole, the top of the upper bottom plate is provided with a through hole, the top of the base is fixedly provided with the sleeve, the sleeve is filled with soil, the quartz tube is also arranged inside the sleeve, the bottom of the quartz tube is arranged on the base, the hollow threaded electrode is fixedly arranged inside the quartz tube, and the tube wall of the quartz tube is sequentially provided with a plurality of exhaust holes from top to bottom, and the low-temperature plasma soil nitrogen fixation device has the beneficial effects that: the reaction time is short, and the action mechanism is clear; nitrate is directly formed in soil, can be directly absorbed by crops without secondary transfer, and the whole reaction process is driven by clean electric energy without secondary pollution.
Description
Technical Field
The invention relates to the technical field of soil nitrogen fixation, in particular to a low-temperature plasma soil nitrogen fixation device.
Background
The nitrogen element is an indispensable element for plant growth, and soil nitrogen fixation has important significance for ensuring normal growth of crops, improving grain yield and ensuring grain safety. The existing soil nitrogen fixation technologies are mainly divided into two types, one type is microorganism nitrogen fixation, nitrogen in the atmosphere is fixed by using nitrogen fixing bacteria to provide an organic nitrogen source for plant production, for example, the waste fungus culture medium is combined with the nitrogen fixing bacteria for soil nitrogen fixation as described in CN109824404A, however, the nitrogen fixation mode has low conversion rate and large consumption of raw material resources, and cannot be popularized and used on a large scale. Soil improvement and nitrogen fixation were carried out by preparing a soil improving composition as disclosed in CN 105482826A. However, the soil improvement composition has various raw materials and complex process. The other method is to utilize low-temperature plasma to fix nitrogen in soil, for example, a method disclosed in CN110972590A utilizes low-temperature plasma technology to realize soil propulsion type in-situ nitrogen fixation, the method firstly prepares activated water in a liquid phase to realize nitrogen fixation, and then introduces tail gas after reaction into soil to carry out gas phase nitrogen fixation, the method prepares activated water through jet flow, the gas flow required by the method is large, the loss problem of nitride exists in the soil through secondary reaction of a conveying device, and meanwhile, the device is large in size and difficult to transport due to the fact that screw propulsion is required.
Disclosure of Invention
The invention aims to provide a low-temperature plasma soil nitrogen fixation device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a low temperature plasma soil nitrogen fixation device, includes base, inlet port, sleeve, quartz capsule, cavity screw electrode, exhaust hole and high voltage power supply, the base comprises lower plate and upper plate, the upper plate cup joints the top at the lower plate, the inlet port has been seted up to the lateral wall of lower plate, the through-hole has been seted up at the top of upper plate, the top fixed mounting of base has the sleeve, telescopic inside is filled with soil, telescopic inside still is provided with the quartz capsule, the bottom of quartz capsule is installed on the base, the inside fixed mounting of quartz capsule has the cavity screw electrode, the several exhaust hole has been seted up in proper order to the pipe wall top-down of quartz capsule, the bottom and the through-hole of quartz capsule communicate each other, high voltage power supply has been connect in the outside of base, high voltage power supply electric connection cavity screw electrode.
As a further scheme of the invention: the soil submerges the uppermost exhaust hole, and the height of the soil does not exceed the maximum height of the quartz tube and the sleeve.
As a further scheme of the invention: the quartz tube is filled with working gas, and the working gas is air.
As a further scheme of the invention: the number of the quartz tubes is a plurality, and the quartz tubes are arranged annularly.
As a further scheme of the invention: the top of quartz capsule is the dome and is for encapsulated situation, the bottom of quartz capsule sets up the opening.
Compared with the prior art, the invention has the beneficial effects that:
1. the transfer post-mixing reaction is not needed, the operation is simple, and the energy utilization rate is high;
2. the hollow threaded rod is used as a high-voltage electrode, the discharge starting voltage is low, the consumed power is low, the treated soil is used as a part of the discharge reaction, and the temperature of the high-voltage electrode is basically kept unchanged during discharge;
3. the invention utilizes the dielectric barrier discharge technology, the quartz dielectric tube is sleeved outside the high-voltage electrode, the high-voltage electrode is prevented from being polluted to influence discharge, the reaction is not limited by the soil type and purity, stable discharge can be realized, and plasma can be generated;
4. the device has strong adjustability, can simultaneously adjust the gas flow rate and the voltage amplitude according to different soil types and soil treatment capacity, and can flexibly change the number of discharge units to achieve the optimal operation effect;
5. the raw materials required by the invention are only air and soil, the raw materials are simple and easy to obtain, and the electric energy is used for driving, so that the problem of secondary pollution is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
FIG. 3 is a comparison of the germination of lettuce in accordance with the present invention;
FIG. 4 is a graph comparing the dry weight of lettuce according to the present invention.
In the figure: 1 base, 2 inlet ports, 3 sleeves, 4 quartz tubes, 5 hollow threaded electrodes, 6 exhaust holes, 7 high-voltage power supplies and 8 through holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, in the embodiment of the present invention, a low-temperature plasma soil nitrogen fixation device includes a base 1, an air inlet 2, a sleeve 3, a quartz tube 4, a hollow threaded electrode 5, an air outlet 6, and a high voltage power supply 7, where the base 1 is composed of a lower bottom plate and an upper bottom plate, the upper bottom plate is sleeved on the top of the lower bottom plate, the side wall of the lower bottom plate is provided with the air inlet 2, the top of the upper bottom plate is provided with a through hole 8, the top of the base 1 is fixedly provided with the sleeve 3, the sleeve 3 is filled with soil, the sleeve 3 is further provided with the quartz tube 4 inside, the bottom of the quartz tube 4 is mounted on the base 1, the hollow threaded electrode 5 is fixedly mounted inside the quartz tube 4, the tube wall of the quartz tube 4 is sequentially provided with a plurality of air outlets 6 from top to bottom, the bottom of the quartz tube 4 is communicated with the through hole 8, the high voltage power supply 7 is mounted on the outer side of the base 1, and the high voltage power supply 7 is electrically connected to the hollow threaded electrode 5.
It is noted that the soil is submerged in the uppermost exhaust hole 6, and the height of the soil is not more than the maximum height of the quartz tube 4 and the sleeve 3.
It is to be noted that the inside of the quartz tube 4 is filled with a working gas, specifically air.
It should be noted that the number of the quartz tubes 4 is several, and a plurality of the quartz tubes 4 are arranged in a ring shape.
It is noted that the top of the quartz tube 4 is dome-shaped and sealed, and the bottom of the quartz tube 4 is provided with an opening.
Example (b):
firstly, introducing working gas, specifically air, into the quartz tube 4 through the through hole 8 in the quartz tube 4, then filling the sleeve 3 with the treated soil, and then starting the high-voltage power supply 7 to generate discharge; in the stopping work, the high-voltage power supply is firstly turned off, then the treated soil is poured out, and finally the gas is stopped to be introduced.
Adopting 30 lettuce seeds, providing simulated sunlight for 16 hours at 25 ℃, monitoring for 25 days, finally drying for 48 hours at 60 ℃ and weighing;
as shown in fig. 3, the sprouting status of lettuce in the tenth day shows that the sprouting numbers of the three groups of untreated lettuce, nitrogen fixation time of 5 minutes and nitrogen fixation time of 10 minutes all show an increasing trend, and reach a stable value on the sixth day, and the sprouting number of nitrogen fixation time of 10 minutes is 24 and is higher than that of the other two groups;
as shown in fig. 4, the dried lettuce weight after nitrogen fixation for 10 minutes was 16 g, the dried lettuce weight after nitrogen fixation for 5 minutes was 15.5 g, and the untreated dried lettuce weight was 9.5 g, which is clearly better than the dried lettuce weight after nitrogen fixation for 10 minutes.
When the nitrogen fixation of the soil is carried out, the soil is filled into the sleeve 3, the high-voltage power supply 6 is turned on, air enters from the air inlet 2 on the base 1, the hollow threaded electrode 5 discharges to generate plasma at the same time, the plasma reacts with nitrogen molecules and oxygen molecules in the air introduced from the hollow threaded electrode 5 to generate lettuce nitrogen oxides, the nitrogen oxides are blown into the soil from the small holes of the quartz medium tube along with air flow, the nitrogen oxides further react with water molecules in the soil to generate nitrate nitrogen, and meanwhile, the ozone generated by the discharge can oxidize large organic nitrogen molecules to generate small molecular nitrogen.
The invention can dynamically adjust parameters such as high-voltage power supply parameters, working gas types and flow rates, the number of unit discharging units and the like according to the humidity and the type of the soil to be treated. The working gas flow is generally regulated within the range of 50 to 600mL/min, specifically, when the humidity of the soil to be treated is higher, the gas flow rate should be increased to generate more nitrogen oxides to react with water molecules to generate more nitrate nitrogen, and when the moisture content of the soil to be treated is lower, the discharge unit should be reduced or the gas flow rate should be reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. .
Claims (3)
1. The utility model provides a low temperature plasma soil nitrogen fixation device, includes base (1), inlet port (2), sleeve (3), quartz capsule (4), cavity screw electrode (5), exhaust hole (6) and high voltage power supply (7), its characterized in that: base (1) comprises lower plate and upper plate, the upper plate cup joints the top at the lower plate, inlet port (2) have been seted up to the lateral wall of lower plate, through-hole (8) have been seted up at the top of upper plate, the top fixed mounting of base (1) has sleeve (3), the inside of sleeve (3) is filled with soil, the inside of sleeve (3) still is provided with quartz capsule (4), install on base (1) the bottom of quartz capsule (4), the inside fixed mounting of quartz capsule (4) has cavity screw electrode (5), several exhaust hole (6) have been seted up in proper order to the pipe wall top-down of quartz capsule (4), the bottom and through-hole (8) of quartz capsule (4) communicate each other, the outside of base (1) has connect high voltage power supply (7), high voltage power supply (7) electric connection cavity screw electrode (5), the quantity of quartz capsule (4) is a plurality of, and is a plurality of quartz capsule (4) are the ring arrangement, the inside packing of quartz capsule (4) has working gas, the working gas specifically is the air.
2. The low-temperature plasma soil nitrogen fixation device according to claim 1, characterized in that: the soil is submerged in the uppermost exhaust hole (6), and the height of the soil is not more than the maximum height of the quartz tube (4) and the sleeve (3).
3. The low-temperature plasma soil nitrogen fixation device according to claim 1, characterized in that: the top of quartz capsule (4) is the dome and for sealed state, the bottom of quartz capsule (4) sets up the opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843883.2A CN113545190B (en) | 2021-07-26 | 2021-07-26 | Low-temperature plasma soil nitrogen fixation device |
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| CN202110843883.2A CN113545190B (en) | 2021-07-26 | 2021-07-26 | Low-temperature plasma soil nitrogen fixation device |
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| CN113545190A CN113545190A (en) | 2021-10-26 |
| CN113545190B true CN113545190B (en) | 2023-02-24 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4877589A (en) * | 1988-09-19 | 1989-10-31 | Hare Louis R O | Nitrogen fixation by electric arc and catalyst |
| CN102583278A (en) * | 2012-01-18 | 2012-07-18 | 苏州大学 | Preparation of nitric acid by fixing nitrogen through dielectric barrier discharge |
| CN104607457A (en) * | 2014-12-23 | 2015-05-13 | 中山大学 | Device for treating organic contaminated soil on plasma fluidized bed |
| CN108990248A (en) * | 2018-10-11 | 2018-12-11 | 南京苏曼等离子科技有限公司 | A kind of plasma producing apparatus and its application |
| CN109076934A (en) * | 2018-10-11 | 2018-12-25 | 南京苏曼等离子科技有限公司 | A kind of air fertilizer applicator system and control method |
| CN110972590A (en) * | 2019-10-12 | 2020-04-10 | 浙江大学 | Method and device for realizing soil push type in-situ nitrogen fixation by using low-temperature plasma technology |
| CN111265978A (en) * | 2020-03-06 | 2020-06-12 | 南京工业大学 | Compact plasma concerted catalysis organic waste gas processing apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6503402B2 (en) * | 2000-12-12 | 2003-01-07 | Nytrox !, Inc. | System and method for treating irrigation water |
| CN111389326A (en) * | 2020-03-24 | 2020-07-10 | 四川大学 | Nitrogen fixation device and method based on liquid film-dielectric barrier discharge low-temperature plasma |
| CN111848312A (en) * | 2020-08-06 | 2020-10-30 | 常熟理工学院 | Method for preparing urea and liquid nitrogen fertilizer by using low-temperature plasma reaction system |
| CN112266273B (en) * | 2020-10-29 | 2021-12-31 | 华中科技大学 | Method and system for in-situ synthesis and application of plant nitrogen fertilizer |
-
2021
- 2021-07-26 CN CN202110843883.2A patent/CN113545190B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4877589A (en) * | 1988-09-19 | 1989-10-31 | Hare Louis R O | Nitrogen fixation by electric arc and catalyst |
| CN102583278A (en) * | 2012-01-18 | 2012-07-18 | 苏州大学 | Preparation of nitric acid by fixing nitrogen through dielectric barrier discharge |
| CN104607457A (en) * | 2014-12-23 | 2015-05-13 | 中山大学 | Device for treating organic contaminated soil on plasma fluidized bed |
| CN108990248A (en) * | 2018-10-11 | 2018-12-11 | 南京苏曼等离子科技有限公司 | A kind of plasma producing apparatus and its application |
| CN109076934A (en) * | 2018-10-11 | 2018-12-25 | 南京苏曼等离子科技有限公司 | A kind of air fertilizer applicator system and control method |
| CN110972590A (en) * | 2019-10-12 | 2020-04-10 | 浙江大学 | Method and device for realizing soil push type in-situ nitrogen fixation by using low-temperature plasma technology |
| CN111265978A (en) * | 2020-03-06 | 2020-06-12 | 南京工业大学 | Compact plasma concerted catalysis organic waste gas processing apparatus |
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