Water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement

Abstract

The application relates to the field of agricultural irrigation and soil remediation, and discloses a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement, which comprises a mixed water tank, the mixed water tank defines a water containing cavity, the water containing cavity is connected with an inlet and an outlet respectively, the inlet is suitable for connecting irrigation water, and the outlet is suitable for being connected to an irrigation system; an activator adding device is arranged at the inlet and is suitable for adding the activator to the inlet so that the activator is mixed with the irrigation water and then introduced into the water containing cavity; a circulating water path is provided with a nano bubble generating device, the nano bubble generating device is suitable for continuously generating nano bubble water under the condition that the water in the water containing cavity is circulated and treated in the circulating water path; wherein the activated nano bubble water is introduced into farmland for irrigation through the irrigation system after being detected by an online detection device and reaching the standard, and the leaching effect on the salt and the irrigation efficiency of watering and fertilization are greatly improved.

Description

Technical Field

[0001] This application relates to the fields of agricultural irrigation and soil remediation, and in particular to a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement. Background Technology

[0002] Current methods for improving saline-alkali soils mainly include irrigation and drainage for salt leaching, application of microbial treatments or chemical amendments, and planting salt-absorbing plants. Among these, irrigation and drainage for salt leaching is the most widely used method, but it suffers from drawbacks such as significant water waste and low efficiency.

[0003] Among the related technologies, some new inventions, such as the use of nanobubble treatment devices and new soil conditioners, have achieved certain good results. However, they still have drawbacks such as low efficiency of nanobubble treatment equipment and high cost of soil conditioners, which limit their large-scale application and promotion. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. Therefore, the purpose of this application is to propose a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement. It treats irrigation water based on a nanobubble circulation treatment combined with the addition of an activity enhancer, solving the problems of low efficiency in current nanobubble treatment equipment and high cost of soil conditioners. It greatly enhances the leaching effect of salts and the efficiency of watering, fertilization, and irrigation. It is easy to use, inexpensive, and particularly suitable for adoption and large-scale promotion in water-scarce areas.

[0005] To achieve the above objectives, this application provides a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement, comprising: a mixing tank defining a water-containing cavity, the water-containing cavity being connected to an inlet and an outlet of the mixing tank, the inlet being adapted to receive irrigation water, and the outlet being adapted to connect to an irrigation system; an activator dosing device adapted to add an activator into the water-containing cavity; a bubble generating device corresponding to the water-containing cavity to control the generation of bubbles in the water within the water-containing cavity; and a circulating water path, wherein a nanobubble generating device is provided on the circulating water path, the nanobubble generating device being adapted to continuously generate nanobubble water while the circulating water path circulates the water within the water-containing cavity, and the nanobubble water being introduced into farmland for irrigation through the irrigation system.

[0006] Optionally, in some embodiments of this application, the bubble generating device includes: a microporous aeration disc, which is disposed at the bottom of the mixing tank and located within the water-containing cavity. The microporous aeration disc is adapted to perform gas-liquid mixing and agitation of the water in the water-containing cavity under the drive of a compressed air pump to generate bubbles.

[0007] Optionally, in some embodiments of this application, the bubble generating device includes a spray section disposed at the outlet end of the circulating water path, so that the nano-bubble water generates bubbles during the process of being sprayed back into the water-containing cavity.

[0008] Optionally, in some embodiments of this application, the activator includes one or more of a dispersant, a nonionic surfactant, and a scale inhibitor.

[0009] Specifically, the dispersant is calcium sugar alcohol or calcium lactate, the nonionic surfactant is glucamide or alkyl glycoside, and the scale inhibitor is ammonium acrylate.

[0010] Optionally, in some embodiments of this application, the integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement further includes a nanobubble state monitoring probe: a first water quality probe, a second water quality probe, and a third water quality probe. The first water quality probe is used to detect the pH value of the water body, the second water quality probe is used to detect the dissolved oxygen of the water body, and the third water quality probe is used to detect the conductivity of the water body. The nanobubble water is activated when the change in dissolved oxygen meets a preset condition, the pH value is within a preset threshold range, and the conductivity is less than or equal to a preset value.

[0011] Optionally, in some embodiments of this application, a circulating water pump is also provided between the water inlet of the circulating water path and the nanobubble generator, and the operating parameters of the circulating water pump are adapted to the linear velocity of the nanobubble generator.

[0012] Optionally, the circulating water pump is normally open.

[0013] Optionally, in some embodiments of this application, the nanobubble generator is an alternating magnetic field type nanobubble generator, an ultrasonic type nanobubble generator, or a high-pressure jet type nanobubble generator.

[0014] Optionally, in some embodiments of this application, the outlet of the mixing tank is equipped with a high-flow-rate water pump to pump the nanobubble water to the irrigation system.

[0015] The integrated water and fertilizer machine for high-efficiency irrigation and saline-alkali soil improvement according to the embodiments of this application treats irrigation water based on a combination of nanobubble circulation treatment and the addition of an activity enhancer. By integrating the synergistic effect of chemical activators and physical nanobubble generators, the generation efficiency of nanobubbles is increased. The chemical activators used, such as calcium sugar alcohol, glucosamine, or a combination of one or more, can increase salt solubility and facilitate plant absorption and utilization, making it environmentally friendly. Furthermore, utilizing the long lifespan of nanobubbles, the nanobubble generator is placed in the circulating water path, forming a continuous internal circulation treatment mode for nanobubble water. During idle periods, treated water is stored, allowing a small-capacity nanobubble generator to meet the needs of large-area irrigation, saving costs and increasing efficiency. Therefore, the high-efficiency, low-cost enhanced nanobubble water treatment system provided by the embodiments of this application can achieve water-saving irrigation, low-cost soil improvement, is easy to use, has low construction and operating costs, and significantly improves the leaching of salt and soil permeability in saline-alkali soils, making it suitable for adoption and large-scale promotion in water-scarce areas.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement according to an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement according to another embodiment of this application.

[0020] Figure label:

[0021] 1. Mixing tank; 2. Nano bubble generator; 3. Microporous aeration disc; 4. Circulating water pump; 5. Activator dosing device; 6. Detection device, 61: first water quality probe, 62: second water quality probe, 63: third water quality probe; 7. Compressed air pump; 8. High flow water pump; 9. Spraying unit. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0023] In the description of this application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] The following is for reference. Figure 1 and Figure 2 This application describes a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement according to embodiments of the present application.

[0027] like Figure 1 or Figure 2 As shown, the integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement includes a mixing tank 1, a bubble generating device, an activator dosing device 5, and a detection device 6.

[0028] The mixing tank 1 defines a water-containing cavity, which is connected to the inlet and outlet of the mixing tank 1. The inlet is suitable for receiving irrigation water, and the outlet is suitable for connecting to an irrigation system.

[0029] Specifically, the inlet and outlet of the mixing tank 1 can be connected to the water storage chamber through pipelines, and valves can be installed on the inlet and outlet pipelines to control the water inlet and outlet.

[0030] like Figure 1 or Figure 2 As shown, the activator dosing device 5 is suitable for adding activator into the water-containing cavity. Furthermore, the activator dosing device 5 can be installed at the inlet so that the activator is mixed with the irrigation water and then introduced into the water-containing cavity.

[0031] In the embodiments of this application, the activator is added at the inlet by the activator dosing device 5, which facilitates the mixing of the activator with the irrigation water before it is introduced into the water-containing cavity. In this way, regardless of whether the activator is an aqueous solution or a powder, it can be fully mixed with the irrigation water and introduced into the water-containing cavity through the irrigation water. This avoids problems such as stains and corrosion caused by the activator sticking to the pipe wall, and makes full use of the activator without waste.

[0032] Furthermore, a bubble generating device is provided corresponding to the water-containing cavity to control the generation of bubbles in the water within the cavity.

[0033] like Figure 1 or Figure 2 As shown, a circulating water path is provided for the mixing water tank 1, and a nano bubble generator 2 is provided on the circulating water path. The nano bubble generator 2 is suitable for cutting the bubbles in the water body to generate nano bubble water when the water body in the water chamber is circulated and treated by the circulating water path.

[0034] The nanobubble generator 2, installed on the water path that bypasses and circulates the water chamber, can be an alternating magnetic field type nanobubble generator, an ultrasonic type nanobubble generator, or a high-pressure jet type nanobubble generator. It can further break down large bubbles in the water within the chamber, generating nanobubbles (e.g., less than 2 micrometers in diameter) that can survive stably for extended periods. This nanobubble water alters the physicochemical properties of the water, such as reducing surface tension and increasing the solubility of minerals. These nanobubbles can have a lifespan exceeding one week. Due to significantly enhanced permeability and wettability, water rich in nanobubbles and activators, when irrigated into the soil, can quickly deliver nutrients to the vicinity of crop roots, promoting nutrient absorption. Simultaneously, it leaches salts from the soil surface into the lower soil layers, causing them to quickly detach from the crop roots and mitigating damage.

[0035] like Figure 1 or Figure 2 As shown, the detection device 6 is adapted to detect the water in the water-containing cavity to determine whether the nano-bubble water has been activated. The activated nano-bubble water is then introduced into the farmland for irrigation through the irrigation system.

[0036] Specifically, the treated nano-bubble water can be connected to an irrigation pipe (usually a drip irrigation system) or sprayed through the interface at the bottom of the mixing tank 1. The aqueous solution treated by this system can efficiently wash away salt in saline-alkali soil, while enhancing soil permeability and promoting crop growth.

[0037] Therefore, the enhanced nanobubble water treatment system provided in this application embodiment, which features high efficiency and low cost, can achieve water-saving irrigation, improve soil efficiently and at low cost, is easy to use, has low construction and operating costs, and has significant effects on leaching salt and increasing soil permeability in saline-alkali soils. It is suitable for use and large-scale promotion in water-scarce areas. Specifically, by installing an activator dosing device 5 at the top inlet of the mixing tank 1 (the incoming water can be ordinary water bodies such as river water, lake water, or well water), the activator can be fully mixed with the ordinary water body during addition. Regardless of whether the activator is powder or liquid, it can be fully dissolved in the water. Furthermore, these activators can synergistically work with the nanobubble generator to increase the nanobubble generation efficiency and enhance the leaching effect on soil salts, all while being green and pollution-free.

[0038] Optionally, in some embodiments of this application, the activator may include one or more of a dispersant, a nonionic surfactant, and a scale inhibitor. Furthermore, regardless of the trace components included in the activator, its addition amount typically does not exceed 0.1% by weight.

[0039] Specifically, the preferred dispersants are calcium sugar alcohol and calcium lactate, the preferred nonionic surfactants are glucamide and alkyl glycosides, and the preferred scale inhibitors are ammonium acrylate.

[0040] In some embodiments of this application, when the activator includes the sugar alcohol calcium and ammonium acrylate, the ratio between the sugar alcohol calcium and the ammonium acrylate is 1:1.

[0041] In some other embodiments of this application, when the activator includes the alkyl glycoside and ammonium acrylate, the ratio between the alkyl glycoside and the ammonium acrylate is 1:5.

[0042] By rationally combining the activator components, not only can the solubility of salt be increased, but it can also be fully absorbed by plants, making it green and environmentally friendly. At the same time, it works synergistically with the nanobubble generator to increase the efficiency of nanobubble generation and improve the leaching effect of salt in the soil.

[0043] Optionally, in one embodiment of this application, such as Figure 1 As shown, the bubble generating device may include a microporous aeration disc 3. The microporous aeration disc 3 is disposed at the bottom of the mixing tank 1. The microporous aeration disc 3 is adapted to mix and agitate the water in the water-containing chamber under the drive of the compressed air pump 7, while mixing air (or pure oxygen) into the water to generate bubbles.

[0044] This embodiment provides a water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement. It integrates a chemical activator and a nanobubble generator to activate irrigation water. The machine includes a mixing tank 1, a nanobubble generator 2, a microporous aeration disc 3, an activator dosing device 5, and a detection device 6. The activator dosing device 5 is installed at the top inlet of the mixing tank 1, allowing the addition of dispersants, nonionic surfactants, scale inhibitors, and other trace components. The microporous aeration disc 3 at the bottom of the mixing tank 1 mixes and agitates the water in the container. The nanobubble generator 2 is connected to the container via a bypass circulation water path, continuously circulating the water and significantly increasing the concentration and lifespan of the nanobubbles. The treated activated water is then connected to an irrigation pipe (usually a drip irrigation system) or sprayed through an interface at the bottom of the mixing tank 1. The aqueous solution treated by this system can efficiently remove salt from saline-alkali soils while simultaneously improving soil aeration and promoting crop growth.

[0045] Alternatively, in another embodiment of this application, such as Figure 2 As shown, the bubble generating device may also include a spray section 9, which is located at the outlet of the circulating water path so that the nano-bubble water generates bubbles as it is sprayed back into the water chamber.

[0046] In this embodiment, a spray section 9 is provided at the outlet of the circulating water path, so that the bubble water treated by the nanobubble generator 2 is sprayed back into the water chamber, generating a sufficient number of primary bubbles (micrometer to millimeter scale). These bubbles are then circulated and cut by the nanobubble generator 2, becoming smaller and more stable nanobubbles, thereby greatly increasing the nanobubble generation efficiency. Furthermore, the entire circulation process continuously circulates the water in the water chamber, significantly enhancing the concentration and lifespan of the nanobubbles. These nanobubbles can have a lifespan of over a week. Due to the greatly enhanced permeability and wettability, water rich in nanobubbles and activators, when irrigated into the soil, can quickly bring nutrients to the vicinity of crop roots, promoting nutrient absorption, while also leaching salts from the soil surface into the lower soil layers, causing them to quickly detach from the crop roots and reducing damage.

[0047] Optionally, the spray section 9 can be configured as a Venturi nozzle structure, which can significantly improve the efficiency of bubble generation and greatly reduce energy consumption.

[0048] And, as Figure 2 As shown, a pretreatment device 10 can be added at the front end of the nanobubble generator 2. For example, it can be an ultrasonic generator. It uses the cavitation effect of ultrasound to generate a large number of microbubbles, which are then processed by the nanobubble generator to become nanobubbles. Combined with the spraying treatment of the spraying unit 9, the efficient generation of nanobubbles can be achieved.

[0049] In other examples of this application, the pretreatment device 10 can also be replaced by an electrolytic cell equipped with a large number of microelectrodes. By using microelectrodes to electrolyze water, a large number of nano or micron bubbles can be generated. These bubbles can then enter a nano bubble generator for further processing. Combined with the spray treatment of the spray section 9, the efficient generation of nano bubbles can also be achieved.

[0050] like Figure 2 As shown, in some embodiments of this application, the detection device 6 includes nanobubble state monitoring probes: a first water quality probe 61, a second water quality probe 62, and a third water quality probe 63. The first water quality probe 61 is used to detect the pH value of the water, the second water quality probe 62 is used to detect the dissolved oxygen in the water, and the third water quality probe 63 is used to detect the conductivity of the water. That is, the detection device 6 is equipped with three water quality probes for pH value, dissolved oxygen (DO), and conductivity (EC) to monitor changes in nanobubble concentration and water quality.

[0051] Specifically, the nanobubble water is activated when the changes in dissolved oxygen meet preset conditions, the pH value is within a preset threshold range, and the conductivity is less than or equal to a preset value.

[0052] Specifically, the concentration of nanobubbles is mainly reflected in changes in dissolved oxygen (DO). Nanobubble concentration can maintain DO at a supersaturated level in water for tens of hours, while ordinary bubbles cannot maintain this level and typically deplete rapidly within minutes. Therefore, monitoring changes in dissolved oxygen in the water using the second water quality probe 62 can determine whether the nanobubble concentration meets the activation requirements. pH and conductivity (EC), influenced by the amount of activator added, are mainly used to detect the addition and dissolution of the activator. The amount and dissolution of the activator, in turn, promote nanobubble generation efficiency. Therefore, a pH value typically set within the range of 6.5–8.5 and an conductivity not exceeding 0.5 mS / cm ensures sufficient activator dissolution and optimally promotes nanobubble generation efficiency.

[0053] In some embodiments of this application, such as Figure 1 or Figure 2 As shown, by setting a circulating water pump 4 between the water inlet of the circulating water circuit and the nanobubble generator, the bubbles are circulated and cut by the nanobubble generator 2, thus becoming smaller and more stable nanobubbles. This not only greatly increases the nanobubble generation efficiency, but also enables continuous circulation of the water in the water chamber throughout the entire circulation process, greatly enhancing the concentration and survival time of the nanobubbles.

[0054] The operating parameters of the circulating water pump 4 are adapted to the linear velocity of the nanobubble generator 2. In other words, the operating parameters of the circulating water pump 4 are determined based on the linear velocity flowing through the nanobubble generator 2. Typically, the operating parameters of the circulating water pump 4 need to be configured to ensure that the water in the water chamber circulates through the nanobubble generator 2 at a flow rate not lower than a set value, such as 0.2 m / s, thereby transforming conventional bubbles (diameters from micrometers to millimeters) in the water into smaller nanobubbles (diameters less than 2 micrometers). Therefore, the adaptation of the operating parameters of the circulating water pump 4 to the linear velocity of the nanobubble generator 2 ensures the effectiveness and efficiency of nanobubble generation.

[0055] In summary, the water and fertilizer integrated machine for high-efficiency irrigation and saline-alkali soil improvement in this application embodiment treats irrigation water based on nanobubble circulation treatment combined with the addition of an activity enhancer. By integrating the synergistic effect of chemical activators and physical nanobubble generators, the generation efficiency of nanobubbles is increased. Therefore, it not only has the advantages of high efficiency and low cost, but also achieves water-saving irrigation, low-cost soil improvement, is easy to use, has low construction and operation costs, and has a significant effect on leaching salt and increasing soil permeability in saline-alkali soil. It is suitable for adoption and large-scale promotion in water-scarce areas.

[0056] Specifically, as shown in Table 1 below, water treated by the integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement in this application embodiment has a significant effect on leaching salt and increasing soil permeability in saline-alkali soil compared to irrigation using only nano-bubble treatment, irrigation using only activator treatment, and irrigation with untreated water. This effect is mainly reflected in four indicators: soil porosity, saturated water holding capacity, dissolved oxygen, and total salt.

[0057] These are some key indicators of soil impact in agricultural irrigation. Higher soil porosity and dissolved oxygen levels indicate looser soil, which is beneficial for crop root respiration and growth. Higher soil saturated water holding capacity indicates stronger water retention, preventing rapid water loss and maintaining irrigation effectiveness. Conversely, higher salinity indicates severe soil salinization, which is detrimental to crop growth. Soil salinity >1% is considered severe salinization, where most plants cannot grow. High-quality arable land generally has a soil salinity below 0.2%.

[0058] Therefore, the data in Table 1 below clearly show that when water treated by the water-fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement according to the embodiments of this application is used for irrigation, various soil indicators are significantly improved, especially the desalination effect is very significant.

[0059] Table 1

[0060]

[0061] Specifically, in one example of this application, such as Figure 1 As shown, this integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement mainly includes a mixing tank 1 and a microporous aeration disc 3 installed at the bottom of the tank. The microporous aeration disc 3 is driven by a compressed air pump 7 connected to the outside of the tank to increase the dissolved oxygen concentration and agitate the mixed solution in the water in the mixing tank. At the same time, there is another bypass circulation pipeline, through which a small flow circulation pump 4 circulates the water in the tank through a nanobubble generator 2 (preferably an alternating magnetic field type passive nanobubble generator) at a flow rate of not less than 0.2 m / s, turning the conventional bubbles (diameter from micrometers to millimeters) in the water into smaller nanobubbles (diameter less than 2 micrometers). Furthermore, the tank is equipped with an activator dosing device 5 and a detection device 6. The detection device 6 is equipped with three water quality probes for pH, dissolved oxygen (DO), and electrical conductivity (EC), used to monitor changes in nanobubble concentration and water quality. The activator dosing device 5 adds a trace amount (generally not exceeding 1000 ppm) of activator at the water tank inlet. The activator can be calcium sugar alcohol (500 ppm) + ammonium acrylate (500 ppm). The activator enhances the generation efficiency of nanobubbles and improves the permeability and wetting properties of the nanobubble water after it enters the soil, increasing the leaching effect of salts while also improving soil aeration and fertility. The circulating water pump 4 can be continuously operated to circulate the water in the tank. The activated nanobubble water can be periodically pumped out of the tank by a high-flow water pump 8 located at the outlet of the mixing tank and used for farmland irrigation.

[0062] In another specific example of this application, such as Figure 2 As shown, irrigation water enters the mixing tank 1 through an inlet. An activator dosing device 5 is connected to the inlet, allowing for the quantitative addition of a trace amount of activator to the mixing tank 1. The activator can be an alkyl glycoside (100 ppm) + ammonium acrylate (500 ppm). A circulating water pump 4, connected to the bypass circulation pipeline of the mixing tank 1, draws water from the mixing tank and forces it through a nanobubble generator 2 (preferably an alternating magnetic field type passive nanobubble generator) at a flow rate not less than a set value, for example, 0.4 m / s. This transforms conventional bubbles (micrometers to millimeters in diameter) in the water into ultrafine and ultralong-life nanobubbles (less than 2 micrometers in diameter). The nanobubbles are then sprayed back into the mixing tank 2 from the top through a spray nozzle 9. A detection device 6 is installed in the mixing tank 2, using three water quality probes—pH, dissolved oxygen (DO), and electrical conductivity (EC)—to monitor changes in nanobubble concentration and water quality. The activated nanobubble water is then pumped out of the mixing tank by a high-flow-rate pump 8 located at the outlet and used for farmland irrigation.

[0063] In other words, in some embodiments of this application, a high-flow-rate water pump 8 can be installed at the outlet of the mixing tank to pump nanobubble water to the irrigation system for farmland irrigation.

[0064] The amount of activator added is determined based on the concentration (e.g., generally not exceeding 0.1% wt) and the volume of the water tank. The operating parameters of the compressed air pump are related to the static water pressure in the water pipe. Its pressure range is usually set to be 0.1 to 1 bar higher than the static water pressure in the water pipe, while the static water pressure in the water pipe is usually only 0.1 to 0.2 bar, which can avoid energy waste.

[0065] Therefore, the water and fertilizer integrated machine for high-efficiency irrigation and saline-alkali soil improvement in this application embodiment treats irrigation water based on a combination of nanobubble circulation treatment and the addition of an activity enhancer. By integrating the synergistic effect of chemical activators and physical nanobubble generators, the generation efficiency of nanobubbles is increased. The chemical activators used, such as one or more combinations of sugar alcohol calcium and glucosamine, can both increase salt solubility and be absorbed and utilized by plants, making it environmentally friendly. Furthermore, by utilizing the long lifespan of nanobubbles and placing the nanobubble generator in the circulating water path, a continuous internal circulation treatment mode for nanobubble water can be formed. During idle periods, treated water is stored, allowing a small-capacity nanobubble generator to meet the needs of large-area irrigation, saving costs and increasing efficiency.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A water and fertilizer integrated machine for efficient irrigation and saline-alkali soil improvement, characterized in that, include: A mixing tank, the mixing tank defining a water-containing cavity, the water-containing cavity being connected to an inlet and an outlet of the mixing tank respectively, the inlet being adapted to receive irrigation water, and the outlet being adapted to connect to an irrigation system; An activator dosing device, the activator dosing device being adapted to add an activator into the water-containing cavity; A bubble generating device is provided corresponding to the water-containing cavity to control the generation of bubbles in the water within the water-containing cavity; A circulating water system is provided, in which a nanobubble generator is installed. The nanobubble generator is adapted to continuously generate nanobubble water when the water in the water-containing chamber is circulated and treated by the circulating water system. The nanobubble water is introduced into the farmland for irrigation through the irrigation system.

2. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to claim 1, characterized in that, The bubble generating device includes: A microporous aeration disc is disposed at the bottom of the mixing tank and located within the water-containing cavity. The microporous aeration disc is adapted to mix and agitate the water in the water-containing cavity under the drive of a compressed air pump to generate bubbles.

3. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to claim 1, characterized in that, The bubble generating device includes: A spray section is provided at the outlet end of the circulating water path so that the nano-bubble water generates bubbles as it is sprayed back into the water chamber.

4. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to any one of claims 1-3, characterized in that, The activator includes one of the following: dispersant, nonionic surfactant, and scale inhibitor.

5. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to claim 4, characterized in that, The dispersant is calcium sugar alcohol or calcium lactate, the nonionic surfactant is glucamide or alkyl glycoside, and the scale inhibitor is ammonium acrylate.

6. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to any one of claims 1-3, characterized in that, It also includes nanobubble state monitoring probes: a first water quality probe, a second water quality probe, and a third water quality probe. The first water quality probe is used to detect the pH value of the water body, the second water quality probe is used to detect the dissolved oxygen of the water body, and the third water quality probe is used to detect the conductivity of the water body. The nanobubble water is activated when the change in dissolved oxygen meets a preset condition, the pH value is within a preset threshold range, and the conductivity is less than or equal to a preset value.

7. The water and fertilizer integrated machine for efficient irrigation and saline and alkaline soil improvement according to any one of claims 1-3, characterized in that, A circulating water pump is also provided between the water inlet of the circulating water circuit and the nanobubble generator, and the operating parameters of the circulating water pump are adapted to the linear velocity of the nanobubble generator.

8. The water and fertilizer integrated machine for efficient irrigation and saline and alkaline soil improvement according to any one of claims 1-3, characterized in that, The nanobubble generator is an alternating magnetic field type nanobubble generator, an ultrasonic type nanobubble generator, or a high-pressure jet type nanobubble generator.

9. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to any one of claims 1-3, characterized in that, The outlet of the mixing tank is equipped with a high-flow-rate water pump to pump the nanobubble water to the irrigation system.

10. The integrated water and fertilizer machine for efficient irrigation and saline-alkali soil improvement according to claim 7, characterized in that, The circulating water pump is normally open.

Images