CN109076934B - Air fertilizer applying system and control method - Google Patents
Air fertilizer applying system and control method Download PDFInfo
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- CN109076934B CN109076934B CN201811185470.4A CN201811185470A CN109076934B CN 109076934 B CN109076934 B CN 109076934B CN 201811185470 A CN201811185470 A CN 201811185470A CN 109076934 B CN109076934 B CN 109076934B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G29/00—Root feeders; Injecting fertilisers into the roots
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
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Abstract
The invention discloses an air fertilizer applying system and a control method, wherein the system comprises a controller, an air fertilizer generator, a main gas transmission pipeline, a branch gas transmission pipeline, and one or more of a soil moisture sensor, a PH sensor and an EC sensor, which are connected with the controller; the air fertilizer generator is communicated with an inlet of a main gas pipeline, and an outlet of the main gas pipeline is communicated with a branch gas pipeline; the soil moisture sensor, the PH sensor, the EC sensor and a part of the branch gas pipeline are buried in soil of a plant root layer, and a plurality of air fertilizer applying openings are formed in the part of the branch gas pipeline. According to the invention, the power of the air fertilizer generator can be controlled by the controller according to the actual condition of soil nutrients, so that the conveying flow of the air fertilizer is controlled, the air fertilizer is kept in a proper range, and the precision, the intellectualization and the automation of the air fertilizer application are realized.
Description
Technical Field
The invention relates to an air fertilizer generation and application system and a control method, in particular to a method for preparing an air fertilizer by ionizing nitrogen into nitrogen plasma through high-voltage discharge and automatically controlling the application of the fertilizer. Relates to the technical field of plasma experimental equipment.
Background
The fertilizer is grain of crops, is a material basis for increasing yield, and has an average yield increasing effect of 50% in the season and after effect according to grain and agricultural organization statistics of united countries, and the average contribution rate of the fertilizer to the yield of agricultural products is 57.8% in the whole country as shown by the soil fertility monitoring result in recent years in China. China has cultivated land accounting for 7% of the world and people accounting for 22% of the world, half of which should be attributed to the fertilizer effect.
The industrial fertilizer production has the problems of high energy consumption, high pollution and the like, the chemical fertilizer has low utilization rate and serious waste, and if the nitrogen compound which is not timely utilized by plants exists in the form of NH4-N which cannot be adsorbed by soil colloid, the nitrogen compound can be transferred to the position below a root system dense layer along with the infiltration of soil water to cause pollution. Can cause eutrophication of river, lake and inland sea, pollute soil and deteriorate physical properties.
The process uses air as main basic raw material, and the reaction process does not need high temperature, high pressure and catalyst, so the method is a novel green nitrogen fixation technology with great potential and has good application prospect in the field of agricultural fertilizers. Currently, there is little systematic research on this technology, as well as on air fertilizer application.
Disclosure of Invention
The invention aims to provide an air fertilizer applying system which is matched with various digital sensors to realize accurate application of fertilizer and is suitable for automatic air fertilizer applying management on crops.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides an air fertilizer applying system, which comprises a controller, an air fertilizer generator, a main gas pipeline, a branch gas pipeline, a soil moisture sensor, a PH sensor and an EC sensor, wherein the air fertilizer generator, the main gas pipeline and the branch gas pipeline are connected with the controller; the air fertilizer generator is communicated with an inlet of a main gas pipeline, and an outlet of the main gas pipeline is communicated with a branch gas pipeline; the soil moisture sensor, the PH sensor, the EC sensor and a part of the branch gas pipeline are buried in soil of a plant root layer, and a plurality of air fertilizer applying openings are formed in the part of the branch gas pipeline.
The air fertilizer prepared by the air fertilizer generator is conveyed to plant root layer soil through a gas pipeline after being cooled, and can be used as a source of nutrition required by plant growth after being absorbed by the plant soil, so that the growth of plants is promoted. According to the invention, the power of the air fertilizer generator can be controlled by the controller according to the soil moisture sensor, the PH sensor and the EC sensor, so that the conveying flow of the air fertilizer is controlled, the air fertilizer is kept in a proper range, and the precision, the intellectualization and the automation of the air fertilizer application are realized. The invention solves the problems of low fertilizer utilization rate, difficult precise control of the application amount and the like in the conventional fertilization, and adopts the novel air fertilizer as the raw material, and has the advantages of simple process, no pollution, convenient operation and low price.
Preferably, the device also comprises an electromagnetic valve, a flow detector and a main check valve, wherein the electromagnetic valve, the flow detector and the main check valve are sequentially connected in series on a main gas transmission pipeline; the electromagnetic valve and the flow detector are connected with the controller; the tail end of the branch gas transmission pipeline is connected with the main gas transmission pipeline through a branch check valve. The main check valve can prevent the air fertilizer from flowing reversely to the flow detector and the electromagnetic valve. The tail ends of the branch gas transmission pipelines are connected into the main gas transmission pipeline, so that resources can be saved, air fertilizer which is not sprayed into the soil is converged into the main gas transmission pipeline and is further conveyed to the soil again, and the arrangement of the branch check valves prevents the air fertilizer from entering the branch gas transmission pipelines from the tail ends of the branch gas transmission pipelines. The flow monitor is arranged to detect the flow in the main gas transmission pipeline, and the controller controls the opening of the electromagnetic valve according to the flow information, so that the air fertilizer flow is suitable for being sprayed into soil and absorbed by the soil, and resource waste is avoided.
Preferably, the air fertilizer applying opening is spherical and provided with a plurality of air transmission small holes, which is favorable for spraying the air fertilizer.
The air fertilizer generator comprises a spray pipe, and a high-voltage electrode and a low-voltage electrode which are arranged in the spray pipe; the method is characterized in that: one end of the jet pipe is provided with a cyclone wheel, the cyclone wheel changes the gas flowing through the cyclone wheel into spiral gas flow, and the spiral gas flow sequentially passes through a high-voltage electrode and a low-voltage electrode; the other end of the jet pipe is provided with a discharge port; the low-voltage electrode is in a spiral shape, and the deflection angle of the cyclone wheel is the same as or equal to that of the spiral-shaped electrode.
After being electrified, the power supply inputs high-voltage electricity to the air fertilizer generator through the high-voltage wiring terminal, and discharge arc is generated between the high-voltage electrode and the low-voltage electrode. The gas is fed from the input hole, flows through the cyclone wheel and is regulated into spiral gas flow by the cyclone wheel, the gas flow generates vortex flow, and enters a reaction zone consisting of a high-voltage electrode and a low-voltage electrode, and according to the vortex theory, the center pressure of the rotating gas flow is lower than the outer pressure, and negative pressure is formed at the center. According to the gas discharge characteristics, the discharge voltage is lower in the place where the gas pressure is low than in the place where the gas pressure is high, and the discharge is easier. Therefore, by utilizing the air pressure difference generated by the cyclone effect, the plasma generated by discharge can be restrained near the central axis of the injection pipe, so that the injection travel of the plasma is further. The air fertilizer generator of the present invention is capable of forming a plasma torch of 10cm or even longer. If the cyclone wheel is not arranged, the airflow field of the airflow in the jet pipe can be parallel airflow or turbulent flow, the central air pressure of the central axis of the jet pipe and the air pressure of the pipe wall can not form pressure difference, random discharge can be formed by discharge, the path and shape of plasma generated by the discharge are difficult to control, and finally, the discharge plasma can not be conveyed to a position farther from a discharge electrode, namely, the required long-distance and convergence-state plasma can not be generated; at the same time, the spiral gas pushes the discharge arc to move along the spiral low-voltage electrode, a spiral plasma torch is generated, and the gas is ionized by the spiral plasma torch. The deflection angle of the cyclone wheel is the same as or equal to the deflection angle of the spiral low-voltage electrode, namely, the deflection angle of the spiral airflow generated after passing through the spiral wheel is the same as or equal to the deflection angle of the spiral low-voltage electrode, so that the length of the generated spiral plasma torch reaches the longest, and the efficiency is highest. The deflection angle of the cyclone wheel is kept consistent with the deflection angle of the spiral low-voltage electrode as much as possible, so that the effect is best, the resistance of the rotating air flow can be reduced, and the interference of turbulent flow to the rotating air flow can be reduced as much as possible; it is envisioned that the deflection angle may be slightly different where only sub-optimal results are desired.
The cyclone wheel comprises a cyclone wheel body, wherein at least four through air holes are formed in the cyclone wheel body; the air holes form concentric circles, the air holes are uniformly distributed on the circumferences of the concentric circles, the included angles between each air hole and the tangent line of the concentric circle where the air hole is located are equal, and the included angle between each air hole and the radial direction of the concentric circle is larger than 0 degrees and smaller than 90 degrees. The included angle between the air holes and the tangent line of the concentric circle is equal, so that the air holes are sequentially distributed along the clockwise direction or the anticlockwise direction of the concentric circle, and the directions of the openings of the air holes are kept consistent, thereby ensuring the generation of rotary air flow. Preferably, the included angle between the air hole and the radial direction of the concentric circle is in the range of 30 degrees to 60 degrees, namely, 30 degrees or more and 60 degrees or less, the generated rotating air flow is optimal, and the plasma in the required long distance and convergence state can be better formed.
It should be noted that the spiral hole may be formed in the cyclone wheel body, and the deflection angle of the spiral hole is the same as or equal to that of the spiral low-voltage electrode, so that the gas passing through the cyclone wheel forms a spiral gas flow.
The high-voltage electrode is a conical electrode which is made of stainless steel materials, and the central line of the conical electrode is overlapped with the central line of the spiral airflow. The resistance of the conical electrode to the rotating air flow is smaller, so that the top end (namely the conical tip) of the conical electrode can be ensured to be just at the center of the axis of the injection pipe and the position of the lowest point of the rotational flow air pressure. The top end of the conical electrode is easier to start discharge due to the smaller curvature radius, and the top end of the conical electrode is easier to discharge at the position of the lowest point of the rotating air flow pressure so as to generate plasma, and stable long-distance and convergence-state plasma is generated.
Preferably, the electrode is a spiral titanium wire with a diameter ranging from 0.5mm to 3 mm.
For convenient equipment installation and maintenance, the injection pipe includes first sleeve and second sleeve that links together, and high voltage electrode, the electrode of voltage set up respectively in first sleeve, second sleeve. The first sleeve and the second sleeve can be connected through threads.
The invention provides a control method of an air fertilizer applying system, which comprises the following steps of
(1) Acquiring the moisture, PH and EC signals of the current soil, and controlling the power of an air fertilizer generator and the opening of an electromagnetic valve according to the moisture, PH and EC signals of the current soil and the current fertilizer demand of crops;
(2) The air fertilizer is conveyed through a main gas conveying pipeline and a branch gas conveying pipeline and conveyed to the root soil of crops through an air fertilizer applying port;
(3) Acquiring the moisture, PH and EC signals of the current soil, and closing the electromagnetic valve and the air fertilizer generator if the moisture, PH and EC signals of the current soil show that the requirements of crops on fertilizer are met; otherwise, the fertilizer is continuously conveyed to the root soil of the crops.
The invention has the following beneficial effects: the air fertilizer prepared by the air fertilizer generator is conveyed to plant root layer soil through a gas pipeline after being cooled, and can be used as a source of nutrition required by plant growth after being absorbed by the plant soil, so that the growth of plants is promoted. According to the invention, the power of the air fertilizer generator can be controlled by the controller according to the soil moisture sensor, the PH sensor and the EC sensor, so that the conveying flow of the air fertilizer is controlled, the air fertilizer is kept in a proper range, and the precision, the intellectualization and the automation of the air fertilizer application are realized. Solves the problems of low fertilizer utilization rate, difficult precise control of the application amount and the like in the conventional fertilization, and adopts the novel air fertilizer as the raw material, and has simple process, no pollution, convenient operation and low price.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a control schematic of the present invention;
FIG. 3 is a cross-sectional view of an air fertilizer;
FIG. 4 is a schematic view of the appearance of an air fertilizer;
FIG. 5 is a front view of a cyclone wheel;
fig. 6 is a cross-sectional view A-A of fig. 4.
In the figure: 1. the device comprises an air fertilizer generator, 2, an electromagnetic valve, 3, a flow detector, 4, a main check valve, 5, a branch check valve, 6, a soil moisture sensor, 7, a PH sensor, 8, an EC sensor, 9, an air fertilizer applying port, 10, a programmable logic controller, 11, a main gas pipeline, 12, a branch gas pipeline, 13, a vegetation root system layer, C1, an energy input cable, C2, a gas source input hole, C3, a discharge port, C4, a first sleeve, C5, a high-voltage electrode, C6, a cyclone wheel, C7, a low-voltage electrode, C8, a second sleeve, C9, an insulating layer, C10, a cyclone wheel body, C11, a gas hole, C12, a gas inlet, C13, a gas outlet, C14 and a gas collecting area.
Detailed Description
As shown in fig. 1, the air fertilizer applying system provided by the invention comprises an air fertilizer generator 1, an electromagnetic valve 2, a flow detector 3, a main check valve 4, a branch check valve 5, a soil moisture sensor 6, a PH sensor 7, an EC sensor 8, an air fertilizer applying port 9, a controller 10, a main gas pipeline 11 and a branch gas pipeline 12.
The controller 10 is in communication connection with the air fertilizer generator 1, the electromagnetic valve 2, the flow detector 3, the soil moisture sensor 6, the PH sensor 7 and the EC sensor 8; the flow detector 3, the soil moisture sensor 6, the PH sensor 7 and the EC sensor 8 are connected with signal input ends of the controller 10, and output ends of the controller 10 are connected with the air fertilizer generator 1 and the electromagnetic valve 2.
The air fertilizer generator 1 is communicated with a main gas transmission pipeline 11. The electromagnetic valve 2, the flow detector 3 and the main check valve 4 are sequentially connected in series on the main gas pipeline 11, and the tail end of the main gas pipeline 11 is communicated with the inlet end of the branch gas pipeline 12. The branch gas transmission pipeline 12 is buried in the plant root system layer which is 0.5 to 1 meter away from the ground, and spherical air fertilizer application openings 9 which are distributed with gas transmission holes are uniformly distributed. The soil moisture sensor 6, the PH sensor 7 and the EC sensor 8 are buried in the plant root system layer to monitor the soil condition. In order to avoid air fertilizer waste, the tail end of the branch air conveying pipeline 12 is connected back to the main air conveying pipeline 11 through the branch check valve 5, or the tail end of the branch air conveying pipeline 12 is communicated with the inlet end of the branch air conveying pipeline 12 through the branch check valve 5 to form a closed loop, and redundant air fertilizer which is not sprayed into soil is returned to the inlet and is continuously used together with newly generated air fertilizer. The main check valve 4 is arranged, so that the air fertilizer can only be conveyed from the main gas conveying pipeline to the branch gas conveying pipeline, and the branch check valve 5 is arranged, so that the air fertilizer is unidirectional in the conveying direction of the branch gas conveying pipeline, namely, the air fertilizer cannot be directly conveyed from the main gas conveying pipeline to the tail end of the branch gas conveying pipeline.
The controller 10 of the invention can adopt a programmable logic controller, and can control the power of the air fertilizer generator and the opening of the electromagnetic valve, thereby controlling the conveying flow of the air fertilizer, keeping the conveying flow within a proper range and realizing the precision, the intellectualization and the automation of the air fertilizer.
The invention provides an operation method of an air fertilizer applying system, which comprises the following specific steps:
before starting up, the power input plug is confirmed to be reliably connected with the power supply socket, and the ground wire binding post is reliably connected with the standard ground. After confirming the error, the air fertilizer generator is turned on.
And secondly, acquiring current soil moisture, PH and EC signals by using a soil moisture sensor 6, a PH sensor 7 and an EC sensor 8, and controlling the power of an air fertilizer generator and the opening of an electromagnetic valve by a programmable logic controller according to the current soil moisture, PH and EC signals and the current fertilizer demand of crops.
And thirdly, conveying the air fertilizer prepared by the air fertilizer generator through a main gas conveying pipeline and a branch gas conveying pipeline, conveying the air fertilizer to soil at the root of crops through an air fertilizer applying opening, and feeding back conveying rate information to a logic controller by a flow detector.
And step four, after air fertilizer is conveyed to the soil of the root of the crop for a period of time, the soil moisture sensor 6, the PH sensor 7 and the EC sensor 8 are utilized to obtain the moisture, PH and EC signals of the current soil, and if the moisture, PH and EC signals of the current soil show that the requirements of the crop on the fertilizer are met, the electromagnetic valve is closed. And closing the air fertilizer generator, powering off the equipment, and disconnecting the input of the total power supply. Otherwise, the fertilizer is continuously conveyed to the root soil of the crops.
As shown in fig. 3 and 4, the air fertilizer generator provided by the invention comprises a spray pipe, a high-voltage electrode C5, a cyclone wheel C6 and a low-voltage electrode C7. The high-voltage electrodes C5, C7 are disposed in the injection tube.
The injection tube comprises a first sleeve C4 and a second sleeve C8, the first sleeve C4 being screwed with the second sleeve C8. The first sleeve C4 is made of a metal material, and the high-voltage electrode C5 is installed in the first sleeve C4. The left end of the first sleeve is sealed, the cyclone wheel C6 is arranged in the first sleeve C4, a gas collecting area C14 is formed between the cyclone wheel C6 and the left end of the first sleeve, the gas source input hole C2 is communicated with the gas collecting area C14, and gas is input through the gas source input hole C2, enters the gas collecting area C14 and is regulated into rotary gas flow after passing through the cyclone wheel C6. The inner wall of the first sleeve C4 is provided with an insulating layer C9. The second sleeve C8 is a quartz glass sleeve, the low-voltage electrode C7 is mounted in the second sleeve C8, and the discharge port C3 is provided at the right end portion of the second sleeve C8. The power supply is connected with the high-voltage electrode C5 through an energy input cable C1, and the high-voltage electrode C7 is connected to the first sleeve C4 to realize grounding connection.
The high-voltage electrode C5 is a conical high-voltage electrode which can be made of high-temperature resistant stainless steel, and the central line of the conical high-voltage electrode is coincident with the central line of the spiral airflow. The voltage peak value of the power supply is more than or equal to 3kV, the frequency is higher than 9kHZ, and the input energy is higher than 100W. The low-voltage electrode C7 is spiral, and can be made of spiral metal wires, and further, the high-voltage resistant Wen Taisi is adopted to manufacture the spiral low-voltage electrode C7, and the diameter size of the titanium wires is between 0.5mm and 3 mm. The deflection angle of the cyclone wheel C6 is the same as or equivalent to the deflection angle of the spiral low-voltage electrode C7, namely, the deflection angle of the rotating airflow formed by the adjustment of the cyclone wheel is the same as or equivalent to the deflection angle of the spiral low-voltage electrode C7.
As shown in fig. 5 and 6, the cyclone wheel C6 includes a cyclone wheel body C10, and the cyclone wheel body C10 may take a cylindrical shape. The cyclone wheel body C10 is provided with at least three through air holes C11, the front surface of the cyclone wheel body C10 is communicated to the back surface, a gas inlet C12 is formed in the front surface of the cyclone wheel body C10, and a gas outlet C13 is formed in the back surface. The air holes C11 form concentric circles, and the air holes C11 are uniformly distributed on the circumferences of the concentric circles. Each air hole C11 forms an included angle with a tangent line of a concentric circle at the position of the air hole, eight air holes are drawn in the figure, eight included angles are formed, and the eight included angles are equal, so that the direction of the opening of each air hole on the cyclone wheel body is consistent. The air hole C11 may be a round hole or a square hole. For a circular hole, the included angle between the axis of each air hole C11 and the concentric circle tangent line at the corresponding position is the same, and for a square hole, the included angle between the center line of each air hole C11 and the concentric circle tangent line at the corresponding position is the same. The air hole C11 is an inclined hole, that is, an included angle between the air hole C11 and the radial direction of the concentric circle (that is, an included angle α between the air hole C11 and the back surface of the cyclone wheel) is greater than 0 degrees and less than 90 degrees, and in order to obtain a better effect, the included angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.
The air fertilizer generator promotes nitrogen to ionize and generate nitrogen plasma in the high-voltage discharge process by exposing air in the novel spiral plasma torch reaction device. The invention uses low-temperature plasma discharge to generate a spiral plasma torch, which can make air fully contact with the plasma torch and has extremely high energy utilization rate. The reacted gaseous fertilizer is discharged from the discharge port C3 and can be directly injected into the plant root through a pipeline to be used as a raw material for synthesizing nitrogen by the plant. The invention has simple operation, strong controllability and low treatment cost; air is used as a raw material, so that the treatment cost is low and the efficiency is high.
Claims (9)
1. An air fertilizer application system, characterized by: the device comprises a controller, an air fertilizer generator, a main gas transmission pipeline, a branch gas transmission pipeline, a soil moisture sensor, a PH sensor and an EC sensor, wherein the air fertilizer generator, the main gas transmission pipeline and the branch gas transmission pipeline are connected with the controller; the air fertilizer generator is communicated with an inlet of a main gas pipeline, and an outlet of the main gas pipeline is communicated with a branch gas pipeline; the soil moisture sensor, the PH sensor, the EC sensor and a part of the branch gas pipeline are buried in soil of a plant root layer, and a plurality of air fertilizer applying openings are formed in the part of the branch gas pipeline; the air fertilizer generator comprises a spray pipe, and a high-voltage electrode and a low-voltage electrode which are arranged in the spray pipe; one end of the jet pipe is provided with a cyclone wheel, the cyclone wheel changes the gas flowing through the cyclone wheel into spiral gas flow, and the spiral gas flow sequentially passes through a high-voltage electrode and a low-voltage electrode; the other end of the jet pipe is provided with a discharge port; the low-voltage electrode is in a spiral shape, and the deflection angle of the cyclone wheel is the same as or equal to that of the spiral-shaped electrode.
2. An air fertilizer application system according to claim 1 and wherein: the device also comprises an electromagnetic valve, a flow detector and a main check valve, wherein the electromagnetic valve, the flow detector and the main check valve are sequentially connected in series on a main gas transmission pipeline; the electromagnetic valve and the flow detector are connected with the controller; the tail end of the branch gas transmission pipeline is connected with the main gas transmission pipeline through a branch check valve.
3. An air fertilizer application system according to claim 1 and wherein: the air fertilizer applying opening is spherical and is provided with a plurality of air delivery small holes.
4. An air fertilizer application system according to claim 1 and wherein: the cyclone wheel comprises a cyclone wheel body, and at least three through air holes are formed in the cyclone wheel body; the air holes form concentric circles, the air holes are uniformly distributed on the circumferences of the concentric circles, the included angles between each air hole and the tangent line of the concentric circle where the air hole is located are equal, and the included angle between each air hole and the radial direction of the concentric circle is larger than 0 degrees and smaller than 90 degrees.
5. The air fertilizer application system of claim 4, wherein: the included angle between the air hole and the radial direction of the concentric circle is 30-60 degrees.
6. An air fertilizer application system according to claim 1 and wherein: the high-voltage electrode is a conical electrode, and the central line of the conical electrode coincides with the central line of the spiral airflow.
7. An air fertilizer application system according to claim 1 and wherein: the injection pipe comprises a first sleeve and a second sleeve which are connected together, and the high-voltage electrode are respectively arranged in the first sleeve and the second sleeve.
8. An air fertilizer application system according to claim 1 and wherein: the electrode is a spiral titanium wire, and the diameter size range is between 0.5mm and 3 mm.
9. A control method of an air fertilizer application system, employing the air fertilizer application system of claim 2, characterized in that:
(1) Acquiring the moisture, PH and EC signals of the current soil, and controlling the power of an air fertilizer generator and the opening of an electromagnetic valve according to the moisture, PH and EC signals of the current soil and the current fertilizer demand of crops;
(2) The air fertilizer is conveyed through a main gas conveying pipeline and a branch gas conveying pipeline and conveyed to the root soil of crops through an air fertilizer applying port;
(3) Acquiring the moisture, PH and EC signals of the current soil, and closing the electromagnetic valve and the air fertilizer generator if the moisture, PH and EC signals of the current soil show that the requirements of crops on fertilizer are met; otherwise, the fertilizer is continuously conveyed to the root soil of the crops.
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| CN1504438A (en) * | 2002-12-05 | 2004-06-16 | 黄金富 | Microorganism agricultural fertilizer modified in plasma environment |
| CN104737688A (en) * | 2015-03-23 | 2015-07-01 | 马人欢 | Automatic fertilization system |
| JP6804748B2 (en) * | 2016-06-22 | 2020-12-23 | 学校法人東京理科大学 | Nitrogen source production equipment, nutrient solution supply equipment, growing system, plant cultivation system, and method for producing nitrogen source |
| US10688465B2 (en) * | 2016-09-14 | 2020-06-23 | Mark Salerno | Method and apparatus to infuse water with nitrate (NO3) and nitrite (NO2) using electrical plasma for use in plant fertilization |
| CN106168822A (en) * | 2016-09-30 | 2016-11-30 | 深圳前海弘稼科技有限公司 | A kind of environmental control of greenhouse method, device and intelligent greenhouse |
| CN206497347U (en) * | 2016-12-30 | 2017-09-15 | 苏加强 | A kind of fertigation control system controlled based on PLC |
| CN206728580U (en) * | 2017-05-24 | 2017-12-12 | 山东旺盛园林股份有限公司 | A kind of vertical planting water-fertilizer integral device |
| CN107875988A (en) * | 2017-12-01 | 2018-04-06 | 南京苏曼等离子科技有限公司 | A kind of submerged jet plasma prepares liquid nitrogen fertilizer system |
| CN209330827U (en) * | 2018-10-11 | 2019-09-03 | 南京苏曼等离子科技有限公司 | A kind of air fertilizer applicator system |
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