阅读说明：本技术 一种低温等离子体土壤固氮装置 (Low-temperature plasma soil nitrogen fixation device ) 是由 王森 周子凯 方志 于 2021-07-26 设计创作，主要内容包括：本发明公开了一种低温等离子体土壤固氮装置,包括底座、进气孔、套筒、石英管、中空螺纹电极、排气孔和高压电源,所述底座由下底板和上底板构成,所述上底板套接在下底板的顶部,所述下底板的侧壁开设有进气孔,所述上底板的顶部开设有通孔,所述底座的顶部固定安装有套筒,所述套筒的内部装填有土壤,所述套筒的内部还设置有石英管,所述石英管的底部安装在底座上,所述石英管的内部固定安装有中空螺纹电极,石英管的管壁自上而下依次开设有数个排气孔,本发明的有益效果：其反应时间快、作用机理明确；直接在土壤中形成硝酸盐,不需要二次转移就可以被农作物直接吸收,整个反应过程由清洁的电能驱动,没有二次污染。(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.)

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: 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 an 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 a sleeve (3), the inside of the sleeve (3) is filled with soil, a quartz tube (4) is also arranged in the sleeve (3), the bottom of the quartz tube (4) is arranged on the base (1), a hollow threaded electrode (5) is fixedly arranged in the quartz tube (4), the wall of the quartz tube (4) is sequentially provided with a plurality of exhaust holes (6) from top to bottom, the bottom of quartz capsule (4) and through-hole (8) 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).

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 quartz tube (4) is filled with working gas, and the working gas is air.

4. The low-temperature plasma soil nitrogen fixation device according to claim 1, characterized in that: the number of the quartz tubes (4) is a plurality, and the quartz tubes (4) are arranged annularly.

5. 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.

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 method of fixing nitrogen in soil by using waste fungus culture medium and combining nitrogen fixing bacteria as described in CN109824404A 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 making a soil improvement 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, the 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 has the advantages that the gas flow required for preparing the activated water through jet flow is large, the loss problem of nitride exists in the soil after secondary reaction through 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 in accordance with 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 quartz tube 4 is fixedly provided with the hollow threaded electrode 5 inside, the wall of the quartz tube 4 is sequentially provided with a plurality of air outlets 6 from top to bottom, and the bottom of the quartz tube 4 is communicated with the through hole 8, the high-voltage power supply 7 is installed on the outer side of the base 1, and the high-voltage power supply 7 is electrically connected with 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 from the tenth day to the last day shows that the sprouting numbers of three groups of untreated lettuce, nitrogen fixation for 5 minutes and nitrogen fixation for 10 minutes all show an increasing trend, and reach a stable value on the sixth day, and the sprouting number of nitrogen fixation for 10 minutes is 24 and 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 flow rate of the working gas is generally adjusted within the range of 50-600 mL/min, specifically, when the humidity of the soil to be treated is high, the flow rate of the gas 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 low, the discharge unit should be reduced or the flow rate of the gas 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. .