A saline-alkali soil desalination device and method

Abstract

The present invention discloses a saline-alkali soil desalination device and method, the device comprising: a groundwater level control system, a salt collecting blanket, and a soil moisture rapid evaporation system. The groundwater level control system is suitable for regulating and controlling the groundwater level of the soil; the salt collecting blanket is a three-dimensional mesh porous structure, which is laid on the soil surface and is suitable for gathering and condensing soil salt by capillary action; the soil moisture rapid evaporation system is arranged above the salt collecting blanket, which is suitable for promoting rapid evaporation of soil moisture, enhancing the capillary action of the soil and the salt collecting blanket, thereby accelerating the desalination of soil salt. The present invention utilizes the soil capillary principle, and promotes rapid soil desalination through precise groundwater level control and rapid evaporation of soil moisture. It has the advantages of water and energy saving, simple structure, convenient operation, low use cost, and ecological environmental protection, and has broad application prospects and practical value.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land treatment, and in particular to a saline-alkali land soil desalination device and method. Background Art

[0002] Saline-alkali land, as a special type of soil, is widely distributed in many regions around the world, especially in arid and semi-arid areas and coastal areas. This type of soil contains excessive salt, which mainly comes from the evaporation and deposition of groundwater, as well as unreasonable agricultural irrigation and drainage methods. High salt content seriously affects the normal growth of crops and reduces land productivity, thus becoming an important factor restricting the sustainable development of agriculture. Therefore, the development of effective soil desalination technology is of great significance for improving saline-alkali soil, restoring land productivity and promoting sustainable development.

[0003] At present, a number of technologies have been proposed and applied for the treatment and improvement of saline-alkali land. Existing desalination technologies are mainly divided into physical salt washing, chemical improvement and biological restoration, the main contents of which are as follows:

[0004] 1) Physical salt washing technology. Physical salt washing technology is to reduce the groundwater level by building a drainage system, thereby reducing the salt in the soil. Although this method is direct and effective, it requires a large amount of water resources and energy input, is costly, has unstable effects, and may cause secondary pollution;

[0005] 2) Chemical improvement technology. Chemical improvement technology is to add chemical reagents to change the soil structure or react with salt to reduce soil salinity. This method is often costly and may have adverse effects on soil microorganisms and plants, and there is a risk of secondary pollution to the soil environment;

[0006] 3) Bioremediation technology. Bioremediation technology uses plants, microorganisms and other organisms to absorb or transform salt in the soil. This method is less efficient and is greatly restricted by climate and soil conditions.

[0007] In summary, the existing saline-alkali soil desalination technology has limitations in terms of operational difficulty, economic cost, and environmental impact. There is an urgent need for a more efficient, environmentally friendly, and economical desalination device and method to solve these problems. Summary of the invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing saline-alkali soil desalination technology in terms of operational difficulty, economic cost, environmental impact, etc., thereby providing a saline-alkali soil desalination device and method.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A saline-alkali soil desalination device, comprising:

[0011] A groundwater level control system, wherein the groundwater level control system is suitable for adjusting and controlling the groundwater level in the soil;

[0012] A salt-collecting blanket is laid on the soil surface and is a three-dimensional mesh porous structure. The salt-collecting blanket is suitable for collecting and condensing soil salt by capillary action;

[0013] A soil moisture rapid evaporation system is provided above the salt collecting blanket and is suitable for promoting rapid evaporation of soil moisture, enhancing the capillary action of the soil and the salt collecting blanket, and thus accelerating the release of soil salt.

[0014] Further optimizing the technical solution, the groundwater level control system includes:

[0015] A water storage barrel, wherein the water storage barrel is suitable for storing water required for regulating the groundwater level;

[0016] A water pump, wherein the water pump is arranged inside the water storage tank;

[0017] At least one perforated water pipe is connected to a water pump and extends into the soil. A plurality of water holes suitable for outputting groundwater to the soil are opened on the pipe wall of the perforated water pipe.

[0018] To further optimize the technical solution, the groundwater level control system further includes:

[0019] A groundwater level sensor, the output end of which is connected to the input end of the water pump intelligent controller, and the groundwater level sensor is suitable for transmitting the soil groundwater level monitoring value to the water pump intelligent controller in real time;

[0020] A water pump intelligent controller, wherein the output end of the water pump intelligent controller is connected to the controlled end of the water pump; the water pump intelligent controller is suitable for receiving the soil groundwater level monitoring value transmitted by the groundwater level sensor, and comparing the soil groundwater level monitoring value with the set soil groundwater level minimum value and soil groundwater level maximum value respectively; when the soil groundwater level monitoring value is lower than the set soil groundwater level minimum value, the water pump intelligent controller starts the water pump to deliver water; when the soil groundwater level monitoring value reaches the set soil groundwater level maximum value, the water pump intelligent controller stops the water pump to deliver water.

[0021] To further optimize the technical solution, the groundwater level sensor is connected to the water pump intelligent controller via a cable or a wireless signal.

[0022] To further optimize the technical solution, the groundwater level sensor is vertically inserted into the soil, the groundwater level sensor is arranged above the perforated water pipe, and the groundwater level sensor is arranged below the salt blanket.

[0023] To further optimize the technical solution, the set minimum value of the soil groundwater level is the minimum depth threshold when the capillary phenomenon of the surface soil is formed.

[0024] Further optimizing the technical solution, the soil moisture rapid evaporation system includes:

[0025] A moisture evaporation air duct, wherein the moisture evaporation air duct cover is arranged above the salt collecting blanket and forms a channel structure with the salt collecting blanket;

[0026] A high-pressure hot air blower is arranged at the air duct opening of the water evaporation air duct. The high-pressure hot air blower is suitable for conveying high-speed hot air to the water evaporation air duct and promoting rapid evaporation of soil surface water through the high-speed hot air.

[0027] To further optimize the technical solution, the water evaporation air duct is formed by closely splicing a plurality of black translucent plastic arched plates;

[0028] Or the water evaporation air duct is constructed by using an arched frame to support a black film.

[0029] A method for desalting saline-alkali soil, which is based on the saline-alkali soil desalination device, and comprises the following steps:

[0030] S1. Install groundwater level control system;

[0031] S2. Laying salt collection blanket;

[0032] S3. Install a soil moisture rapid evaporation system on the salt blanket;

[0033] S4. Start the equipment, control the groundwater level through the groundwater level control system, quickly evaporate the salty water in the soil through the soil moisture rapid evaporation system, and gather and condense the soil salt by the capillary action of the salt blanket;

[0034] S5. Sampling to detect whether the salinity of the soil to be desalted reaches the target value, if it does not meet the standard, proceed to step S4, if it meets the standard, proceed to step S6;

[0035] S6. Dismantle and remove the saline-alkali soil desalination device.

[0036] To further optimize the technical solution, before performing step S1, it also includes the step of loosening and leveling the soil: the compacted soil in the saline-alkali land management area is properly plowed and loosened, and then the soil is leveled and the ground is leveled.

[0037] To further optimize the technical solution, in step S2, when laying the salt-collecting blanket, the salt-collecting blanket is laid on the soil surface along the buried direction of the perforated water pipe of the groundwater level control system.

[0038] To further optimize the technical solution, in step S4, the salt collecting blanket is replaced in time when it is saturated with salt, and the replaced salt collecting blanket is rinsed and kept for use.

[0039] The technical solution of the present invention has the following advantages:

[0040] 1. The present invention provides a saline-alkali soil desalination device with low water consumption, water saving and energy saving. The present invention utilizes the soil capillary principle to promote rapid soil desalination through precise control of groundwater level and rapid evaporation of soil moisture. Compared with traditional physical salt washing technology, the present technical solution greatly reduces water consumption and has significant advantages in water saving and energy saving.

[0041] 2. The present invention provides a saline-alkali soil desalination device, in which a water evaporation air duct is set outside the salt blanket, and a high-pressure hot air blower is set at the air inlet of the water evaporation air duct. When the high-pressure hot air blower delivers high-speed hot air into the channel structure formed by the water evaporation air duct and the salt blanket, the high-speed hot air can quickly evaporate the water in the soil, enhance the capillary action of the soil and the salt blanket, thereby accelerating the desalination of soil salt, with a fast desalination speed and a good desalination effect. Compared with bioremediation technology, the present invention can achieve rapid soil desalination, controllable desalination degree, and good desalination effect.

[0042] 3. The invention provides a saline-alkali soil desalination device, which is in-situ treatment and environmentally friendly. The invention is an in-situ treatment technology, which has little disturbance to the soil, no addition of chemicals, and low negative impact on the ecological environment.

[0043] 4. The saline-alkali soil desalination device provided by the present invention has a simple structure and low use cost. The present invention has a relatively simple structure, is easy to install and operate, and has a low use cost. After the desalination operation is completed on a piece of soil, the device can be disassembled and the desalination operation can be performed on the next piece of soil.

[0044] 5. The saline-alkali soil desalination device provided by the present invention has a high degree of automation and is easy to operate. The present invention controls the start and stop through an automatic control system such as a groundwater level sensor, a water pump intelligent controller, and a water pump, and is easy to operate. The detection of the soil water level height is combined with the control of the soil water level, so that the soil water level is controlled within a suitable range, so that the surface soil can always be in a state of capillary phenomenon, and while being able to reduce water consumption, it can also promote rapid evaporation of water in the soil.

[0045] 6. The saline-alkali soil desalination device provided by the present invention has the advantages of rapid desalination effect, water saving and energy saving, simple structure, convenient construction, easy operation, low use cost, and ecological protection, and has broad application prospects and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic cross-sectional view of a saline-alkali soil desalination device provided by the present invention;

[0048] Figure 2 The present invention provides a schematic structural diagram of a saline-alkali soil desalination device.

[0049] Reference numerals:

[0050] 1. Groundwater level control system, 11. Water storage tank, 12. Water pump, 13. Water pump intelligent controller, 14. Groundwater level sensor, 15. Perforated water pipe, 2. Salt blanket, 3. Soil moisture rapid evaporation system, 31. Moisture evaporation air duct, 32. High-pressure hot air blower. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the method of the saline-alkali soil desalination method of the present invention is only a preferred embodiment, and is not intended to limit the scope of protection of the saline-alkali soil desalination method, through precise control of the groundwater level and rapid evaporation of soil moisture so that the salt carried by the evaporation of moisture is collected by the salt collecting blanket, thereby promoting rapid desalination of the soil.

[0052] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an" and "an" as used herein may also be meant to include the plural forms. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0053] Although the terms first, second, etc. may be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. In addition, in the description of the present invention, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0054] For ease of description, spatial relative terms can be used in the text to describe the relationship of an element or feature as shown in the figure relative to another element or feature, and these relative terms are, for example, "front", "rear", "middle", "inside", "longitudinal", "lateral", "side", "vertical", "outside", etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation in addition to the orientation depicted in the figure. For example, if the mechanism in the figure flips, the element described as "below other elements or features" or "below other elements or features" will be subsequently oriented to "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include the orientation on and below. The mechanism can be oriented in addition (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0055] Saline-alkali land, as a special type of soil, is widely distributed in many regions around the world, especially in arid and semi-arid areas and coastal areas. This type of soil contains excessive salt, which mainly comes from the evaporation and deposition of groundwater, as well as unreasonable agricultural irrigation and drainage methods. High salt content seriously affects the normal growth of crops and reduces land productivity, thus becoming an important factor restricting the sustainable development of agriculture. Therefore, the development of effective soil desalination technology is of great significance for improving saline-alkali soil, restoring land productivity and promoting sustainable development.

[0056] At present, a number of technologies have been proposed and applied for the treatment and improvement of saline-alkali land. Existing desalination technologies are mainly divided into physical salt washing, chemical improvement and biological restoration, the main contents of which are as follows:

[0057] 1) Physical salt washing technology. Physical salt washing technology is to reduce the groundwater level by building a drainage system, thereby reducing the salt in the soil. Although this method is direct and effective, it requires a large amount of water resources and energy input, is costly, has unstable effects, and may cause secondary pollution;

[0058] 2) Chemical improvement technology. Chemical improvement technology is to add chemical reagents to change the soil structure or react with salt to reduce soil salinity. This method is often costly and may have adverse effects on soil microorganisms and plants, and there is a risk of secondary pollution to the soil environment;

[0059] 3) Bioremediation technology. Bioremediation technology uses plants, microorganisms and other organisms to absorb or transform salt in the soil. This method is less efficient and is greatly restricted by climate and soil conditions.

[0060] In summary, the existing saline-alkali soil desalination technology has limitations in terms of operational difficulty, economic cost, and environmental impact. There is an urgent need for a more efficient, environmentally friendly, and economical desalination device and method to solve these problems.

[0061] Based on this, the present invention provides a saline-alkali soil desalination device and method. The device utilizes the soil capillary principle to promote rapid soil desalination through precise control of groundwater level and rapid evaporation of soil moisture. The device has a simple structure and is easy to operate. It can effectively reduce soil salinity while reducing negative impacts on the environment. It has broad application prospects and practical value.

[0062] Example 1

[0063] The specific embodiments of the present invention are described in detail below in conjunction with the saline-alkali soil desalination device of the first aspect of the present invention.

[0064] It should be noted that the saline-alkali soil desalination device of the first aspect of the present invention is only a preferred embodiment of the present invention. The saline-alkali soil desalination device of the present invention can adopt the saline-alkali soil desalination device of the first aspect of the present invention, and can also adopt other structures. For the convenience of explanation, the saline-alkali soil desalination device of the first aspect of the present invention is explained below.

[0065] like Figure 1 to Figure 2 As shown, this embodiment discloses a saline-alkali soil desalination device, including a groundwater level control system 1, a salt blanket 2 and a soil moisture rapid evaporation system 3. The groundwater level control system 1 is suitable for regulating and controlling the groundwater level of the soil. The salt blanket 2 is laid on the soil surface. The salt blanket 2 is made of a three-dimensional mesh porous structure material with high porosity, has a strong capillary action and salt analysis condensation ability, and is suitable for utilizing capillary action to gather and condense soil salt. The salt blanket 2 can be replaced after being saturated with salt. The salt-saturated salt blanket 2 can be reused after being rinsed. The soil moisture rapid evaporation system 3 is arranged above the salt blanket 2. The soil moisture rapid evaporation system 3 is suitable for promoting the rapid evaporation of soil moisture, enhancing the capillary action of the soil and the salt blanket, and thus accelerating the soil salt analysis.

[0066] In this embodiment, groundwater is supplied to the saline-alkali soil, and the salt in the saline-alkali soil is dissolved in the groundwater. A salt blanket 2 is laid on the saline-alkali land supplied with groundwater. The salt blanket 2 has a strong capillary effect and salt analysis condensation ability. Then, the principle of soil capillaries is utilized, and the groundwater level is precisely controlled and the soil moisture is rapidly evaporated, so that the salt carried by the evaporation of water is collected by the salt blanket 2, thereby promoting rapid desalination of the soil. The device utilizes the principle of soil capillaries, and promotes rapid desalination of the soil through precise control of the groundwater level and rapid evaporation of soil moisture. It has the advantages of water saving, simple structure, convenient operation, low use cost, and ecological environmental protection.

[0067] In some embodiments, the groundwater level control system 1 includes a water storage barrel 11, a water pump 12 and a perforated water pipe 15. The water storage barrel 11 is a rectangular barrel, suitable for storing water required for controlling the groundwater level. The water pump 12 is arranged inside the water storage barrel 11, one end of the water pump 12 is connected to the perforated water pipe 15, and the other end is connected to the water storage barrel 11. The water pump 12 is suitable for pumping the groundwater in the water storage barrel 11 to the perforated water pipe 15. The perforated water pipe 15 is a hard perforated pipe, buried in the soil, one end of the perforated water pipe 15 is connected to the water pump 12, and the perforated water pipe 15 is bent and buried in the soil and extends along the direction of the salt blanket 2. A plurality of water holes suitable for outputting groundwater to the soil are opened on the pipe wall of the perforated water pipe 15.

[0068] In this embodiment, the groundwater in the water storage barrel 11 can be pumped to the bottom of the salt blanket 2 by the water pump 12, and then the salt can be collected by the salt blanket 2 when the groundwater evaporates, thereby achieving the desalination effect on the soil. Furthermore, the perforated water pipe 15 located below the salt blanket 2 is arranged horizontally, and the number of perforated water pipes 15 can be one or more. When multiple perforated water pipes 15 are provided, the soil below the salt blanket 2 can be supplied with water more evenly, so that the moisture distribution of the soil below the salt blanket 2 is more even, thereby achieving a better desalination effect.

[0069] In some embodiments, the groundwater level control system 1 further includes a groundwater level sensor 14 and a water pump intelligent controller 13. The output end of the groundwater level sensor 14 is connected to the input end of the water pump intelligent controller 13 via a cable or a wireless signal, and the groundwater level sensor 14 is suitable for transmitting the soil groundwater level signal to the water pump intelligent controller 13 in real time. The output end of the water pump intelligent controller 13 is connected to the controlled end of the water pump 12 via a cable or a wireless signal; the water pump intelligent controller 13 is suitable for receiving the soil groundwater level monitoring value transmitted by the groundwater level sensor 14, and comparing the soil groundwater level monitoring value with the set soil groundwater level minimum value and soil groundwater level maximum value respectively, and controlling the start and stop of the water pump 12 according to the soil groundwater level change signal transmitted by the groundwater level sensor 14. When the soil groundwater level monitoring value is lower than the set soil groundwater level minimum value, the water pump intelligent controller 13 starts the water pump to deliver water; when the soil groundwater level monitoring value reaches the set soil groundwater level maximum value, the water pump intelligent controller 13 stops the water pump to deliver water.

[0070] The lowest value of the groundwater level is the lowest depth threshold when the capillary phenomenon of the surface soil is formed. The highest value of the groundwater level is the depth threshold when the water consumption during soil desalination is A; when the groundwater level is lower than the highest value of the groundwater level, the water consumption is low.

[0071] In this embodiment, the detection of soil water level height is combined with the control of soil water level, so that the soil water level is controlled within a suitable range, so that the surface soil can always be in a state of capillary phenomenon, which can reduce water consumption and promote rapid evaporation of water in the soil. Compared with traditional physical salt washing technology, this embodiment greatly reduces water consumption and has significant advantages in water and energy saving.

[0072] In some embodiments, the groundwater level sensor 14 is vertically inserted into the soil, the perforated water pipe 15 is arranged below the groundwater level sensor 14, and the groundwater level sensor 14 is arranged below the salt blanket 2. In this embodiment, one groundwater level sensor 14 can be arranged in the soil, or groundwater level sensors 14 can be arranged at different positions of the soil. The groundwater level sensor 14 can be used to effectively monitor the water level of the soil, so that the water pump intelligent controller 13 can automatically control the water pump, thereby making the regulation of the soil groundwater level more accurate.

[0073] If the groundwater introduced into the soil evaporates naturally, the desalination rate of the soil will be low, resulting in a long desalination time. In order to solve this technical problem, in some embodiments, the soil moisture rapid evaporation system 3 includes a moisture evaporation duct 31 and a high-pressure hot air blower 32. The moisture evaporation duct 31 is arranged in an arch shape, which plays the role of guiding wind direction, absorbing heat and storing heat, and shielding from rain. The moisture evaporation duct 31 is covered above the salt blanket 2 and forms a channel structure with the salt blanket 2. The high-pressure hot air blower 32 is arranged at the duct opening of the moisture evaporation duct 31. The high-pressure hot air blower 32 is suitable for conveying high-speed hot air to the moisture evaporation duct 31 and promoting the rapid evaporation of soil surface moisture through high-speed hot air, thereby enhancing the capillary action of the soil and the salt blanket, thereby accelerating the soil salt analysis.

[0074] In this embodiment, when the high-pressure hot air blower 32 delivers high-speed hot air into the channel structure formed by the water evaporation air duct 31 and the salt collecting blanket 2, the high-speed hot air can quickly evaporate the water in the soil, thereby accelerating the desalination speed of the soil.

[0075] In some embodiments, the water evaporation duct 31 is formed by closely splicing a plurality of black translucent plastic arched plates. As an alternative embodiment, the water evaporation duct 31 is constructed by supporting a black film with an arched frame.

[0076] Example 2

[0077] The specific embodiments of the present invention are described in detail below in conjunction with the saline-alkali soil desalination method according to the second aspect of the present invention.

[0078] It should be noted that the saline-alkali soil desalination method of the second aspect of the present invention is only a preferred embodiment of the present invention. The saline-alkali soil desalination method of the present invention can be carried out by the saline-alkali soil desalination method of the second aspect of the present invention, or by other methods. For the convenience of explanation, the saline-alkali soil desalination method of the second aspect of the present invention is explained below.

[0079] This embodiment discloses a method for desalting saline-alkali soil, comprising the following steps:

[0080] S1: Loosen and level the land: The compacted soil in the saline-alkali land management area should be properly plowed and loosened, and then the land should be leveled and the ground should be leveled.

[0081] S2: Installation of groundwater level control system 1:

[0082] A plurality of perforated water pipes 15 are equally buried in the soil at intervals of 20-60 cm. The burial depth is determined comprehensively based on the target thickness of the desalinated soil layer and the current groundwater level, and the value range is 30-100 cm.

[0083] The groundwater level sensor 14 is vertically buried in the soil, and the groundwater level sensor 14 is buried in the soil above the perforated water pipe 15 .

[0084] Install and connect components such as a water storage tank 11, a water pump 12, a water pump intelligent controller 13, a groundwater level sensor 14, and a perforated water pipe 15.

[0085] S3: Laying the salt collecting blanket 2: Laying the long strip salt collecting blanket 2 on the soil surface along the burying direction of the perforated water pipe 15.

[0086] S4: Install soil moisture rapid evaporation system 3:

[0087] The moisture evaporation duct 31 is installed on the salt blanket 2, and the moisture evaporation duct 31 is covered above the salt blanket 2. The first structural form of the moisture evaporation duct is formed by closely splicing multiple black translucent plastic arched plates. The second structural form of the moisture evaporation duct uses multiple arched frames to construct the duct frame, which is then covered with a black film, and the film corners are pressed into the soil to ensure the sealing of the duct edge.

[0088] The high-pressure hot air blower 32 is disposed at the air inlet of the water evaporation air duct 31 .

[0089] S5: Start the running equipment:

[0090] Add water to the water storage barrel 11; connect the water pump 12, the water pump intelligent controller 13, the high-pressure hot air blower 32 and other electrical equipment to the power supply and start operation.

[0091] The groundwater level is regulated by the groundwater level control system 1 , the high-speed hot air blown out by the soil moisture rapid evaporation system 3 causes the salt-containing moisture in the soil to evaporate rapidly, and the capillary action of the salt blanket 2 is used to gather and condense soil salt.

[0092] During the operation of the equipment, the water pump intelligent controller 13 compares the soil groundwater level monitoring value collected by the groundwater level sensor 14 with the set value, and then accurately adjusts the soil groundwater level to ensure that the soil water level is always in a suitable state. When the soil groundwater level monitoring value is lower than the set soil groundwater level minimum value, the water pump intelligent controller 13 starts the water pump to deliver water; when the soil groundwater level monitoring value reaches the set soil groundwater level maximum value, the water pump intelligent controller 13 stops the water pump to deliver water.

[0093] In this step, the water storage barrel 11 is replenished with water in time according to the water consumption situation to ensure the normal supply of groundwater.

[0094] The salt collecting blanket 2 is replaced in time after being saturated with salt, and the replaced salt collecting blanket 2 is rinsed and put into use.

[0095] S6: sampling to detect whether the salinity of the soil to be desalinated reaches the target value. If it does not reach the target, continue to step S5; if it reaches the target, execute step S7.

[0096] S7: Dismantle and remove the saline-alkali soil desalination device.

[0097] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A saline-alkali soil desalination device, characterized in that: include: A groundwater level control system (1), wherein the groundwater level control system (1) is suitable for regulating and controlling the groundwater level in the soil; A salt-collecting blanket (2), the salt-collecting blanket (2) being laid on the soil surface, the salt-collecting blanket (2) being a three-dimensional mesh porous structure, and the salt-collecting blanket (2) being suitable for collecting and condensing soil salt by utilizing capillary action; A soil moisture rapid evaporation system (3), wherein the soil moisture rapid evaporation system (3) is arranged above the salt collecting blanket (2), and the soil moisture rapid evaporation system (3) is suitable for promoting rapid evaporation of soil moisture, enhancing the capillary action of the soil and the salt collecting blanket, and thus accelerating the release of soil salt; The groundwater level control system (1) comprises: A water storage barrel (11), wherein the water storage barrel (11) is suitable for storing water required for regulating the groundwater level; A water pump (12), wherein the water pump (12) is arranged inside the water storage barrel (11); at least one perforated water pipe (15), the perforated water pipe (15) being connected to the water pump (12), the perforated water pipe (15) extending into the soil, the wall of the perforated water pipe (15) being provided with a plurality of water holes suitable for outputting groundwater to the soil; A groundwater level sensor (14), wherein an output end of the groundwater level sensor (14) is connected to an input end of the water pump intelligent controller (13), and the groundwater level sensor (14) is suitable for transmitting a soil groundwater level monitoring value to the water pump intelligent controller (13) in real time; A water pump intelligent controller (13), wherein the output end of the water pump intelligent controller (13) is connected to the controlled end of the water pump (12); the water pump intelligent controller (13) is suitable for receiving a soil groundwater level monitoring value transmitted by a groundwater level sensor (14), and comparing the soil groundwater level monitoring value with a set soil groundwater level minimum value and a set soil groundwater level maximum value respectively; when the soil groundwater level monitoring value is lower than the set soil groundwater level minimum value, the water pump intelligent controller (13) starts the water pump to deliver water; when the soil groundwater level monitoring value reaches the set soil groundwater level maximum value, the water pump intelligent controller (13) stops the water pump to deliver water.

2. The saline-alkali soil desalination device according to claim 1, characterized in that: The groundwater level sensor (14) is vertically inserted into the soil, the groundwater level sensor (14) is arranged above the perforated water pipe (15), and the groundwater level sensor (14) is arranged below the salt collecting blanket (2).

3. The saline-alkali soil desalination device according to claim 1, characterized in that: The set minimum value of the soil groundwater level is the minimum depth threshold when the capillary phenomenon of the surface soil is formed.

4. The saline-alkali soil desalination device according to any one of claims 1 to 3, characterized in that: The soil moisture rapid evaporation system (3) comprises: A water evaporation air duct (31), wherein the water evaporation air duct (31) is disposed above the salt collecting blanket (2) and forms a channel structure with the salt collecting blanket (2); A high-pressure hot air blower (32), the high-pressure hot air blower (32) being arranged at the air duct opening of the moisture evaporation air duct (31), the high-pressure hot air blower (32) being suitable for conveying high-speed hot air to the moisture evaporation air duct (31) and promoting rapid evaporation of moisture on the soil surface by the high-speed hot air.

5. The saline-alkali soil desalination device according to claim 4, characterized in that: The water evaporation air duct (31) is formed by closely splicing a plurality of black translucent plastic arched plates; Alternatively, the water evaporation air duct (31) is constructed by using an arched frame to support a black film.

6. A method for desalting saline-alkali soil, characterized in that: The method is carried out based on the saline-alkali soil desalination device according to any one of claims 1 to 5, comprising the following steps: S1. Install a groundwater level control system (1); S2. Laying salt collection blanket (2); S3. Installing a soil moisture rapid evaporation system (3) on the salt blanket (2); S4. Start the equipment, control the groundwater level through the groundwater level control system (1), quickly evaporate the salt water in the soil through the soil moisture rapid evaporation system (3), and gather and condense the soil salt by the capillary action of the salt blanket (2); S5. Sampling to detect whether the salinity of the soil to be desalted reaches the target value, if it does not meet the standard, proceed to step S4, if it meets the standard, proceed to step S6; S6. Dismantle and remove the saline-alkali soil desalination device.

7. The method for desalting saline-alkali soil according to claim 6, characterized in that: Before performing step S1, the step of loosening and leveling the soil is also included: the compacted soil in the saline-alkali land treatment area is properly plowed and loosened, and then the soil is leveled and the ground is leveled.

8. The method for desalting saline-alkali soil according to claim 6, characterized in that: In step S2, when laying the salt-collecting blanket (2), the salt-collecting blanket (2) is laid on the soil surface along the burying direction of the perforated water pipe (15) of the groundwater level control system (1).

9. The method for desalting saline-alkali soil according to any one of claims 6 to 8, characterized in that: In step S4, when the salt collecting blanket (2) is saturated with salt, it is replaced in time, and the replaced salt collecting blanket is rinsed and kept aside for use.

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