WO2024005229A1

WO2024005229A1 - System for supplying nutrient solution through plasma droplet sterilization

Info

Publication number: WO2024005229A1
Application number: PCT/KR2022/009396
Authority: WO
Inventors: 홍의기; 김종수; 이홍민
Original assignee: (주)디케이에코팜
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2024-01-04
Also published as: KR20240003359A

Abstract

The present invention relates to a system for supplying a nutrient solution through plasma droplet sterilization. The present invention provides a plasma sterilization and circulation type nutrient solution supply system comprising: a cultivation room (100) for growing plants; a nutrient solution supplier (200) for supplying a nutrient solution to the cultivation room (100); a drainage collection tank (300) for collecting and storing drainage discharged from the cultivation room (100); a sterilization tank (600) for sterilizing the drainage collected in the drainage collection tank (300); a control unit (700) for controlling that plasma-sterilized drainage is supplied from the sterilization tank (600) to the cultivation room (100); and a vaporization injector (680a) capable of vaporizing the drainage into a droplet phase and supplying same to a plasma reactor. In the present invention, drainage discharged after a nutrient solution is supplied to a cultivation room in protected cultivation can be supplied to the cultivation room in an appropriate nutrient solution state through filtration purification using plasma sterilization, and thus waste nutrient solution can be minimized.

Description

Plasma droplet sterilization nutrient solution supply system

The present invention relates to a nutrient solution supply system for supplying nutrient solution to facility cultivation. More specifically, the drainage fluid discharged after supplying nutrient solution to facility cultivation can be purified through plasma droplet sterilization and then re-supplied as nutrient solution through a circulation process. This relates to a plasma droplet sterilization nutrient solution supply system that enables the minimization of waste nutrient solution.

Facility cultivation is a technology for cultivating plants by providing an optimal cultivation environment based on the optimal cultivation conditions necessary for the growth of commonly grown plants.

In other words, facility cultivation is a technology that allows plants to be grown by creating a cultivation environment with optimal conditions for plant growth. Vegetables such as leafy vegetables, fruit vegetables, root vegetables, fruit trees, flowers, etc. are grown in facilities such as glass greenhouses and greenhouses. It is a technology to cultivate .

Cultivation in these facilities has recently been carried out in smart farm facilities equipped with automated equipment, and the above-mentioned smart farm is a science-based system that remotely and automatically observes the growth environment of crops and manages them optimally using information and communication technology (ICT). As it is an agricultural method, it has recently been receiving a lot of attention as a solution to rural problems facing a sustainability crisis, such as stagnation in income, exports, and growth rates due to the aging of the agricultural and livestock population, lack of manpower for young people to take over farming, reduction in production area, and decline in investment.

In addition, in the spread of smart farms, nutrient solution cultivation is a scientific farming technology that grows various crops by supplying a culture medium containing all the nutrients necessary for plant growth. It is used to cultivate plants regardless of the soil, and is differentiated according to the medium. It is becoming.

Such nutrient solution cultivation makes it possible to prevent pests and diseases of various crops, and allows the cultivation of pollution-free plants through cultivation that does not require pesticides. The nutrient solution supply system through this system pre-sets the nutrient solution concentration suitable for the growth of the cultivated crops and then provides nutrients. Phosphorus concentrated nutrient solution is mixed with water and supplied adjusted to the set nutrient solution concentration.

However, the above-mentioned nutrient solution supply system automatically supplies nutrient solution as much as the set value, but in most cases, it supplies more nutrient solution than the appropriate amount when supplying nutrient solution, considering various variables in the supply process, resulting in excessive drainage, and facilities for processing such drainage. There has been a problem that requires this additional installation.

The background or prior art described above is information possessed by the present inventor or acquired in the process of deriving the present invention, and is only intended to help understand the technical significance of the present invention, and is information to which this invention belongs before filing the application for the present invention. It should be noted that this does not mean that it is a widely known technology in the field.

Accordingly, the present inventor comprehensively considers the above-mentioned problems of discharging the drainage water generated by the nutrient solution supplied during facility cultivation without separate storage and treatment, and at the same time, with the idea of solving the technical limitations and problems of the existing technology, The present invention was created as a result of continuous research and effort to develop a nutrient solution supply system that allows the drainage fluid discharged during the facility cultivation process to be reused and then circulated and supplied.

Therefore, the technical problem and purpose to be solved by the present invention is to allow the waste nutrient solution discharged after supplying nutrient solution to the cultivation room in facility cultivation to be re-supplied to the cultivation room in the state of nutrient solution through a purification process through plasma droplet sterilization. The aim is to provide a plasma droplet sterilization nutrient solution supply system that enables the minimization of .

Here, the technical problems and objectives to be solved by the present invention are not limited to the technical problems and objectives mentioned above, and other technical problems and objectives not mentioned will be clearly understood by those skilled in the art from the description below.

Specific means according to the implementation of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above include a raw water tank, a plurality of liquid fertilizer tanks, and supply from the raw water tank. A nutrient solution supplier consisting of a nutrient solution production tank that produces nutrient solution by mixing the raw water and the materials of the liquefied fertilizer tank; A drainage recovery tank that collects and stores the drainage fluid discharged from the plant cultivation room through a storage or recovery pipe and has a circulation pipe connected to the nutrient solution production tank on one side; A sterilization tank installed in the circulation pipe to store the drainage fluid and then plasma sterilize it through a plasma reactor to supply the drainage fluid to the nutrient solution production tank; a bubble generator that supplies air to the drainage liquid stored in the sterilization tank to bubble it so that the plasma of the plasma reactor can be supplied evenly; In response to information on the amount of nutrient solution supplied according to the type of plant in the cultivation room, a control unit for controlling the amount of nutrient solution supplied by controlling the bubble generator, the plasma reactor, and the drainage recovery tank, and a control unit for vaporizing and supplying the drainage solution in the form of droplets to the plasma reactor We present a plasma droplet sterilization nutrient solution supply system that includes a vaporizing sprayer.

The plasma reactor is circular and forms a sterilization pipe passage up and down along the axial direction, and the upper and lower ends of the sterilization pipe passage are connected to the sterilization treatment tank and a body and power source respectively connected through circulation pipes, and are connected to the sterilization pipe passage in the axial direction. It is possible to apply one consisting of an electrode installed along the body, a plurality of electrode parts coupled along the outer circumference of the body, and installed to form a discharge section in the sterilization pipe.

A vaporization injector may be further provided to vaporize and supply the drainage fluid in the form of droplets to the plasma reactor.

The vaporization sprayer includes a body having an inner space, a nozzle coupled to one side of the body to supply drainage liquid, and a first diffusion port of a protruding shape to atomize and diffuse the drainage liquid supplied through the nozzle to the outside through collision. , a perforated mesh body that allows the drainage liquid diffused and injected through the first diffusion port to be supplied while passing through the perforations and atomized, and a distribution block is formed protruding at the center to disperse the distribution passing through the perforated mesh body, and the distribution block is formed. A dispersion inductor with a perforation formed on the outside and fixed to the inner wall of the body, an acceleration guide that guides the drainage fluid passing through the perforation of the dispersion guide toward the center through an inclination angle to accelerate it, and is guided through the acceleration guide. It can be applied to be composed of a second diffusion port that atomizes the drained liquid through collision and diffuses it out, and a droplet supply chamber that guides the drained fluid to be discharged in the form of droplets through the second diffusion port.

The bubble generator may be composed of a pump that supplies air and a plurality of nozzles that supply the air supplied from the pump into the sterilization tank.

In the cultivation room, a temperature sensor that senses the temperature inside the greenhouse, a carbon dioxide sensor, a humidity sensor that measures humidity, a light intensity sensor that measures the light intensity according to solar radiation, and a sensor that senses information on the inflow and discharge and the input nutrient solution. Nutrient solution detection sensors, soil information detection sensors that sense soil information, and displays that can monitor the cultivation room can be installed.

According to the technology of the present invention, which is based on a unique solution to solve the above technical problems, the drainage fluid discharged after supplying nutrient solution to the cultivation room during facility cultivation is cultivated in a nutrient solution state through a circulation process of filtration through plasma sterilization. It has the advantage of minimizing drainage by allowing it to be supplied to the room.

In addition, during the plasma sterilization process, there is an advantage in that the optimal sterilization effect can be obtained by first bubbling the drainage fluid and then sequentially forming it into droplets before plasma sterilization.

Here, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Figure 1 is a configuration diagram of a plasma droplet sterilization nutrient solution supply system according to an embodiment of the present invention.

Figure 2 is a perspective view of the plasma reactor in Figure 1.

Figure 3 is a cross-sectional schematic diagram of Figure 2;

Figure 4 is a cross-sectional schematic diagram showing a vaporization injector as another example according to the present invention.

Figure 5 is another example of Figure 4.

100: Cultivation room

200: Nutrient solution supplier

202: supply pipe

300: Drainage recovery tank

110,400,500: Filter

600: Sterilization tank

680a: vaporization sprayer

700: Control unit

800: Bubble generator

900: Plasma reactor

910: Sterilization pipe

920: body

Hereinafter, embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. Before describing the present invention, the terms described below are defined in consideration of the functions in the present invention, which are technical aspects of the present invention. It is specified that it should be interpreted as a concept that corresponds to the idea and a meaning commonly used or commonly recognized in the relevant technical field. Additionally, if it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description will be omitted.

The drawings attached herein illustrate the composition and operation of the technology, and some parts are exaggerated or simplified for convenience and clarity of understanding, and each component does not exactly match the actual size and shape.

In addition, in this specification, the term and/or refers to a combination of a plurality of related described items or includes any item among a plurality of related described items, and when a part includes a certain element, this refers to a specially opposed description. This does not mean excluding other components unless there is a , but means that other components can be included in addition.

In other words, terms such as 'include', 'equipped', 'have', etc. mean the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in this specification, but one or It should be understood that this does not exclude the presence or addition of other features, numbers, step operation components, parts, or combinations thereof.

In addition, terms such as top, bottom, upper surface, lower surface, or upper, lower, upper, lower, front and back, left and right are used for convenience to distinguish the relative positions of each component. For example, the upper part of the drawing may be referred to as upper and the lower part as lower, the longitudinal direction may be referred to as the front-to-back direction, and the width direction may be referred to as the left-right direction.

Additionally, terms such as first and second may be used to describe various components. That is, terms such as first, second, etc. may be used only for the purpose of distinguishing one component from another component. For example, the first component may be named the second component as long as it does not deviate from the scope of protection of the present invention, and the second component may also be named the first component.

The present invention relates to a plasma droplet sterilization nutrient solution supply system that sterilizes the drainage fluid discharged from the cultivation bed after it is supplied to the cultivation bed of facility cultivation and allows it to be reused.

The present invention includes a cultivation room (100) for cultivating plants, a nutrient solution supplier (200) for supplying a nutrient solution to the cultivation room (100), and a drainage recovery tank for recovering and storing the drainage fluid discharged from the cultivation chamber (100). (300), a sterilization tank 600 for sterilizing the drainage water recovered from the drainage recovery tank 300, and supplying the plasma sterilized drainage water from the sterilization tank 600 to the cultivation room 100. It consists of a control unit 700 that controls.

The cultivation room 100 consists of a cultivation bed with a space inside, and is designed to grow various types of plants in the space. The cultivation bed has an upwardly open cultivation groove for cultivating plants on the upper surface, and various sensors are installed.

The above sensors include a temperature sensor that senses the temperature inside the greenhouse, a carbon dioxide sensor, a humidity sensor that measures humidity, a light intensity sensor that measures the light intensity according to solar radiation, and a sensor that senses information on the inflow and discharge and the input nutrient solution. A display unit is installed to enable real-time monitoring through multiple cameras as well as a nutrient solution detection sensor and a soil information detection sensor that senses soil information.

Accordingly, various signal values measured by the sensor are output to the control unit 700 and compared with stored values that are stored in memory or already stored, so that each corresponding component equipment can be controlled under appropriate conditions.

The nutrient solution supplier 200 includes a raw water tank 220 that stores raw water dissolved through an oxygen dissolver 221, a liquid fertilizer tank 240 that stores various types of nutrient solutions, and a raw water tank 220 from the raw water tank 220. It consists of a nutrient solution production tank (260) that produces nutrient solution by mixing supplied raw water with the corresponding nutrient solution.

The raw water tank 220 is for storing raw water, and an oxygen dissolver 221 is installed on one side to store dissolved oxygen under appropriate conditions.

The liquid fertilizer tank 240 stores nutrient solution, and various types of nutrient solution are stored therein.

The nutrient solution production tank 260 contains the raw water of the raw water tank 220 automatically supplied according to the signal value of the control unit 700, the nutrient solution of the selected liquid fertilizer tank 240 among the liquid fertilizer tanks 240, and the sterilization treatment tank 600. ), the sterilized drainage is mixed at an appropriate ratio and supplied to the cultivation room (100) through the storage and supply pipe (202).

In the nutrient solution production tank 260, an ion sensor, a pH sensor, an EC sensor, etc. may be installed to sense the state of the nutrient solution to supply an appropriate nutrient solution.

The drainage recovery tank 300 collects the drainage fluid from the cultivation chamber 100 and stores the drainage fluid discharged through the storage or recovery pipe 101, and has a circulation pipe 102 connected to the nutrient solution production tank 260 on one side. ) (103) is provided.

The circulation pipe 102 connects the drainage recovery tank 300 and the sterilization treatment tank 600, and the circulation pipe 103 connects the sterilization treatment tank 600 and the nutrient solution production tank 260. there is.

Filters

110 and 400 are respectively installed in the recovery pipe 101 and the circulation pipe 102 to filter foreign substances from the drainage fluid. The

filters

110 and 400 are installed to be replaceable, and foreign substances from the drainage fluid are installed in the recovery pipe 101 and the circulation pipe 102. After filtering, the drainage can be supplied to the sterilization tank (600).

The

filters

110 and 400 may be made of a mesh body with a plurality of gaps in which metal or fiber threads are woven to filter out foreign substances.

Here, the mesh forming the filter 110 (400) forms a collection space to store foreign substances inside, and an inlet for draining fluid is formed on the surface, and the inlet is located at the entrance for rapid inflow. It can be applied in such a way that the inner diameter is gradually reduced in the outlet direction, the inlet edge is fixed to the surface of the mesh, and the outlet end is located in the middle of the collection space.

Accordingly, when drainage flows into the inlet, foreign substances stay in the collection space, and since the outlet of the inlet is narrow, foreign substances accumulated in the collection space do not escape and can remain in the collection space.

The sterilization tank 600 is designed to sterilize the drainage fluid introduced through the circulation pipe 102 and supply the sterilized drainage fluid to the nutrient solution production tank 260 through the circulation pipe 103.

A bubble generator 800 and a plasma reactor 900 are installed in the sterilization tank 600.

The bubble generator 800 filters the drained fluid stored in the sterilizing tank 600 through an inlet pipe, forms bubbles by supplying air to the filtered drained fluid, and then supplies it into the sterilizing tank 600. It is done.

The above-described bubble generator 800 is installed in the circulation pipe 601, and is designed to introduce the drained fluid from the sterilization tank 600, bubble it, and then supply it back to the sterilization tank 600.

This can be applied to a pump that supplies air to the incoming drainage fluid, and a plurality of nozzles that supply the air supplied from the pump into the sterilization tank 600.

In addition, the circulation pipe 601 that allows drainage fluid to flow into the bubble generator 800 includes a filter 500 for filtering foreign substances, a pump (P) for introducing drainage fluid through a pumping operation, and a valve for selectively blocking the inflow of drainage fluid. (V) is installed.

The filter 500 is used to filter foreign substances from drainage fluid and is the same as the filter 110 and filter 400.

The plasma reactor 900 guides the drained fluid in a bubbled and stored state from the bubble generator 800 through the circulation pipe 602 and supplies plasma to the drained fluid through discharge to continuously sterilize the drained fluid and sterilize the sterilization tank ( 600).

The above-described plasma reactor 900 is formed in a circular shape to penetrate up and down the sterilization pipe 910 along the axial direction, and the upper and lower ends of the sterilization pipe 910 are connected to the sterilization treatment tank 600 and the circulation pipe 602, respectively. A body 920 connected through, an electrode 930 connected to a power source and installed along the axial direction in the sterilization pipe 910, and a plurality of electrodes 930 coupled along the outer circumference of the body 920 and the sterilization pipe ( One consisting of an electrode portion 940 installed to form a discharge section in 910 may be applied.

Accordingly, when power is supplied to the electrode 930 and the electrode unit 940 through power application, a discharge section is formed within the sterilization pipe 910. At this time, the drainage fluid flowing in through the sterilization pipe 910 passes through the discharge section. It is plasma sterilized and discharged.

In the figure, 901 is a high voltage generator that supplies power to the

plasma reactor

900, and 902 is a down transformer for conversion.

In addition, a vaporization injector 680a can be installed in the plasma reactor 900 to vaporize and supply the drainage liquid in the form of droplets.

The vaporization injector 680a includes a body 681 having an inner space, a nozzle 682 coupled to one side of the body 681 to supply drainage, and positioned to correspond to the nozzle 682. A first diffusion port 683 in the form of a protrusion that causes the drainage fluid supplied through (682) to diffuse outward and atomize, and the drainage fluid diffused and injected through the first diffusion port 683 passes through the perforation and hits. A perforated mesh body 685 is provided to supply while being dispersed, and a distribution block 699 is formed protruding at the center to disperse the distribution passing through the perforated mesh body 685, and a perforated hole is formed on the outside of the distribution block 699. A dispersion guide 698 fixed to the inner wall of the body 681, an acceleration guide 686 that guides and accelerates the drainage fluid passing through the hole of the dispersion guide 698 toward the center through an inclination angle, and A second diffusion port (687) that spreads and discharges the drainage fluid guided and discharged through the acceleration guide port (686) through collision, and guides the drainage fluid that moves through the second diffusion port (687) to be discharged in the form of droplets. It consists of a liquid droplet supply chamber 688.

Accordingly, when the drainage liquid is supplied through the nozzle 682, it is diffused and sprayed through the first diffusion port 683, then moved inside the perforated mesh 685, and continuously filtered through the perforated mesh 685, and then distributed as a dispersion derivative 698. After being sprayed while passing through the acceleration guide hole 686, it is accelerated again and spread and sprayed again through the second diffusion hole 687 to form droplets while passing through the liquid crystal supply chamber 688 of the plasma reactor 900. ) moves to the sterilization pipe 910 and reacts with plasma in an optimal state in the discharge section.

The control unit 700 is configured to supply an appropriate amount of nutrient solution produced from the nutrient solution production tank 260 to the plant cultivation room 100 through a supply pipe through information on the amount of nutrient solution supplied according to the type of plant.

The above-mentioned control unit 700 includes the known artificial neural network module (Artificial Neural Network) technology, and cultivates by applying artificial intelligence, machine learning, and deep learning-based technology. The amount of nutrient solution supplied to the room 100 can be adjusted.

In the drawing, V is a valve, and the valve (V) is designed to supply and block the drainage fluid transferred through the operation of the pump (P).

In the drawing, P is a pump, and the pump (P) is designed to circulate drainage fluid through a pumping operation.

Meanwhile, the present invention is not limited to the above-described embodiments and the accompanying drawings, and may be modified and applied in various ways not exemplified without departing from the technical spirit of the present invention. It is clear to those skilled in the art that the present invention can be broadly applied by replacing components and changing it to other equivalent embodiments. Therefore, contents related to modifying and applying the technical features of the present invention should be construed as being included within the technical idea and scope of the present invention.

Claims

A nutrient solution supplier (200) consisting of a raw water tank, a plurality of liquid fertilizer tanks, and a nutrient solution production tank for producing nutrient solution by mixing the raw water supplied from the raw water tank and the materials of the liquid fertilizer tank;

A drainage recovery tank (300) that collects and stores the drainage fluid discharged from the plant cultivation room (100) through a storage or recovery pipe and has a circulation pipe connected to the nutrient solution production tank on one side;

A sterilization tank 600 installed in the circulation pipe to store the drainage fluid and then plasma sterilize it through a plasma reactor to supply the drainage fluid to the nutrient solution production tank;

A bubble generator (800) that supplies air to the drainage liquid stored in the sterilization tank to bubble it so that the plasma of the plasma reactor can be supplied evenly;

A control unit 700 that controls the nutrient solution supply amount by controlling the bubble generator 800, the plasma reactor, and the drainage recovery tank 300 in response to information on the nutrient solution supply amount according to the type of plant in the cultivation room;

A vaporization sprayer (680a) that vaporizes and supplies the drainage liquid to the plasma reactor in a droplet state through multi-stage dispersion movement;

A plasma droplet sterilization nutrient solution supply system comprising a.
According to paragraph 1,

The plasma reactor 900,

A body 920 that forms a circular sterilization pipe 910 along the axial direction so as to penetrate up and down, and the upper and lower ends of the sterilization pipe 910 are connected to the sterilization tank 600 through circulation pipes, respectively;

An electrode 930 connected to a power source and installed along the axial direction in the sterilization pipe,

A plasma liquid droplet sterilizing nutrient solution supply system, characterized in that it consists of a plurality of electrode parts 940 that are coupled along the outer circumference of the body and installed to form a discharge section in the sterilizing pipe.
According to paragraph 1,

The vaporization injector (680a),

A body 681 having an inner space, a nozzle 682 coupled to one side of the body 681 to supply drainage, and a drainage liquid positioned to correspond to the nozzle 682 and supplied through the nozzle 682. A first diffusion port 683 in the form of a protrusion that diffuses outward and atomizes it, and a perforated mesh body ( 685), and a distribution block 699 is formed protruding at the center to disperse the distribution passing through the perforated mesh body 685, and a perforation is formed on the outside of the distribution block 699 to form an inner wall of the body 681. A fixed dispersion guide 698, an acceleration guide 686 that guides the drainage fluid passing through the perforation of the dispersion guide 698 toward the center through an inclination angle and accelerates it, and through the acceleration guide 686 It consists of a second diffusion port (687) that diffuses and discharges the drainage fluid that is guided and discharged through collision, and a droplet supply chamber (688) that guides the drainage fluid that moves through the second diffusion port (687) to be discharged in the form of droplets. A plasma droplet sterilization nutrient solution supply system, characterized in that.