Desert Shallow Soil Self-Circulating Moisture Retention System and Method

Abstract

This invention relates to the field of soil moisture retention technology and discloses a self-circulating moisture retention system for shallow desert soil. The system includes a pumping module, a cold condensation water module, a grouting module, and a photovoltaic module. The pumping module comprises a pump and a pumping pipe. The pump is located above ground, and one end of the pumping pipe is connected to the pump, while the other end is buried underground for drawing water from the ground. The cold condensation water module condenses water vapor in the air into liquid and transports it underground. The grouting module injects EICP solution underground to form a water-retaining layer. The photovoltaic module provides power to the system. This invention effectively utilizes deep water sources: through photovoltaic power generation and a pump-driven system, it achieves efficient extraction of deep groundwater in the desert, providing a continuous moisture supply to the shallow soil. This invention also comprehensively utilizes wind energy resources: the wind-powered condensation system condenses water vapor in the air into water, replenishing the shallow soil moisture, reducing evaporation loss, and lowering the system's dependence on groundwater.

Description

Technical Field

[0001] This invention relates to the field of soil moisture retention technology, and in particular to a self-circulating moisture retention system and method for shallow desert soil. Background Technology

[0002] Due to the arid climate and scarce rainfall in desert regions, the shallow soil is almost devoid of moisture, preventing desert vegetation such as poplars and shrubs from absorbing sufficient water, severely impacting their survival and growth. Existing technologies largely rely on surface water resources or traditional irrigation methods, making it difficult to fully utilize deep groundwater resources in the desert. In the hot and dry desert environment, water evaporation is high, and water retention is limited, hindering long-term vegetation protection and restoration. Therefore, this invention proposes a self-circulating moisture retention system and method for shallow desert soil. Summary of the Invention

[0003] To address the technical problems mentioned in the background section, this invention provides a self-circulating moisture retention system and method for shallow desert soil.

[0004] This invention employs the following technical solution: a self-circulating moisture retention system for shallow desert soil, comprising a pumping module, a cold condensate module, a grouting module, and a photovoltaic module, wherein:

[0005] The pumping module includes a pump and a pipe. The pump is located on the ground, one end of the pipe is connected to the pump, and the other end is buried underground to draw water from the ground.

[0006] The cold condensate module is used to condense water vapor in the air into liquid and then transport it underground.

[0007] Grouting modules are used to inject EICP solution underground to form a water-retaining layer;

[0008] The photovoltaic module supplies power to this system.

[0009] As a further improvement to the above solution, the cold condensate module includes a condenser and a condensate delivery pipe. The condenser is used to condense water vapor into liquid water. One end of the condensate delivery pipe is connected to the outlet end of the condenser, and the other end of the condensate delivery pipe extends into a pre-installed water collection area in a shallow aquifer. Several siphon drainage pipes connecting the water collection area are also installed in the shallow aquifer.

[0010] As a further improvement to the above scheme, a wind-powered condenser is adopted.

[0011] As a further improvement to the above scheme, the grouting module includes a grouting supply unit and several grouting pipes inserted underground. The grouting supply unit is used to prepare and deliver the EICP solution, wherein the EICP solution is prepared by mixing urease solution and cementing liquid in a volume ratio of 1:1, and the cementing liquid is prepared by mixing 0.4-1.0 equimolar masses of CaCl2 solution and urea solution.

[0012] As a further improvement to the above scheme, in order to increase the solution viscosity, 0.3-0.5% xanthan gum or Artemisia gum is added to the EICP solution as an additive. The resulting calcium carbonate precipitate can consolidate the soil and improve its water retention performance.

[0013] As a further improvement to the above solution, the grouting pipe includes an outer pipe, an inner shaft coaxially rotatably disposed in the outer pipe, and several micro grout delivery pipes. Several pairs of micro grout delivery pipes are distributed along the axial direction of the inner shaft. One end of the micro grout delivery pipe can slide through a pre-reserved through hole on the outer pipe. The micro grout delivery pipe can be connected to the grout supply unit through a conveying mechanism.

[0014] As a further improvement to the above scheme, the micro slurry delivery pipe and the inner wall of the through hole are slidably connected. The inner end of the micro slurry delivery pipe is provided with a slurry inlet. The outer wall of the inner end of the micro slurry delivery pipe is also fixed with a limit block. The outer end of the micro slurry delivery pipe is distributed with several micro slurry outlet holes. The slurry inlet is used to connect with the conveying mechanism.

[0015] As a further improvement to the above scheme, a rack is fixed to the outer wall of the micro slurry delivery tube along its length, and a transmission gear that meshes with the rack is fixed to the outside of the inner shaft.

[0016] As a further improvement to the above scheme, the conveying mechanism includes a slurry delivery pipe and several slurry gathering discs movably sleeved on the outside of the inner shaft. A connector is installed on the top of the slurry delivery pipe. One of the slurry gathering discs is connected to the slurry delivery pipe. Adjacent slurry gathering discs are connected by several connecting pipes. The number of slurry gathering discs is the same as the number of pairs of micro slurry delivery pipes. Two inserts are fixed at the bottom of the slurry gathering disc and are connected to its interior. The inserts are used to connect with the slurry inlet on the corresponding micro slurry delivery pipe to deliver slurry into the micro slurry delivery pipe.

[0017] Based on the aforementioned moisturizing system, this invention proposes a corresponding self-circulating moisturizing method for shallow desert soil, comprising the following steps:

[0018] Install pumping modules, cold condensate modules, grouting modules, and photovoltaic modules;

[0019] Using photovoltaic modules to extract and utilize deep groundwater;

[0020] The cold condensate module is used to deliver water to the water collection area and to other locations in the shallow aquifer;

[0021] By using grouting modules, a water-retaining layer is formed between the shallow aquifer and the strong evaporation layer, thereby reducing water evaporation.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention effectively utilizes deep water sources: through photovoltaic power generation and a pump-driven system, it achieves efficient extraction of deep groundwater in the desert, providing a continuous water supply to the shallow soil. This invention also comprehensively utilizes wind energy resources: a wind-powered condensation system condenses water vapor in the air into water, replenishing the shallow soil moisture, reducing evaporation loss, and lowering the system's dependence on groundwater. This invention uses siphon drainage pipes to ensure uniform distribution of moisture in the shallow soil, expanding the coverage area of ​​each unit in the self-circulating system and improving the water absorption efficiency of vegetation.

[0024] This invention uses EICP technology to improve shallow sandy soil, enhance its water retention capacity, ensure effective water retention in shallow soil, promote root absorption by vegetation, and further improve soil water retention performance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the self-circulating moisture retention system for shallow desert soil proposed in this invention;

[0026] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the grouting pipe proposed in this invention;

[0027] Figure 3 This is a cross-sectional view of the overall structure of the grouting pipe proposed in this invention;

[0028] Figure 4 For the present invention Figure 3 Cross-sectional view at point AA;

[0029] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the miniature slurry delivery tube after it extends a certain distance;

[0030] Figure 6 This is a schematic diagram illustrating the working principle of the siphon drainage pipe and water collection area proposed in this invention.

[0031] Explanation of key symbols:

[0032] In the diagram: 1. Shallow aquifer; 2. Water retention layer; 3. Strong evaporation layer; 4. Photovoltaic module; 5. Cold condensate module; 6. Condensate delivery pipe; 7. Grouting pipe; 8. Water pump; 9. Water collection area; 10. Siphon drainage pipe; 11.

[0033] 12. Outer tube, 13. Inner shaft, 14. Grout delivery pipe, 15. Connector, 16. Grout delivery pipeline, 18. Grout collection plate, 19. Insert tube, 20. Connecting pipe, 21. Transmission gear, 22. Miniature grout delivery pipe, 23. Grout inlet, 24. Through hole, 25. Limiting block. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] Example 1

[0036] Reference Figure 1-6 This scheme proposes a self-circulating moisture retention system for shallow desert soil, including a pumping module, a cold condensate water module 5, a grouting module, and a photovoltaic module 4, wherein:

[0037] The water pumping module includes a water pump 8 and a water pipe 9. The water pump 8 is located on the ground, one end of the water pipe 9 is connected to the water pump 8, and the other end of the water pipe 9 is buried underground for drawing water from the ground.

[0038] During installation, the pumping module involves first drilling a well at the identified groundwater source location, installing a pump 8 (a deep well pump can be selected), and connecting it to the photovoltaic module. The pump 8 must be ensured to operate continuously, drawing deep groundwater to the collection device. The pumping pipe is made of corrosion-resistant materials to ensure effective water transport from the deep groundwater source to the shallow soil area. Pipeline laying should consider the terrain and pipe length to minimize resistance and losses.

[0039] The cold condensate module 5 is used to condense water vapor in the air into liquid and then transport it underground.

[0040] The grouting module is used to inject EICP solution underground to form a water-retaining layer 2 (formed at a depth of 10cm-30cm below the ground surface).

[0041] Photovoltaic module 4 supplies power to this system. Specifically, in a desert region, a location with good sunlight conditions is selected, photovoltaic panels are installed, and energy storage equipment and a control system are connected. The support system is adjusted to ensure the photovoltaic panels are at the optimal tilt angle.

[0042] In practice, it is also necessary to regularly inspect and maintain the photovoltaic power generation system, water pumps, water pipes, and cold condensate modules to ensure stable operation of each component. Simultaneously, monitor soil moisture content and structural changes, and adjust the application rate of EICP solution as needed.

[0043] In an optional embodiment of the present invention, the cold condensate module 5 includes a condenser and a condensate delivery pipe 6. The condenser is used to condense water vapor into liquid water. One end of the condensate delivery pipe 6 is connected to the outlet end of the condenser, and the other end of the condensate delivery pipe 6 extends into a pre-installed water collection area 10 in a shallow aquifer 1. Several siphon drainage pipes 11 connected to the water collection area 10 are also installed in the shallow aquifer 1. The siphon drainage pipes ensure uniform distribution of moisture in the shallow soil, expand the water application coverage area, and improve the water absorption efficiency of vegetation.

[0044] During the actual construction, a foundation pit for installing the water collection area 10 is first excavated underground. A square water tank is placed in the water collection area, and then the soil is backfilled. A slope is formed around the water tank, and then several siphon drainage pipes 11 are laid on the slope. One end of the siphon drainage pipe 11 is connected to the inside of the water tank. Since the length of the siphon drainage pipes can be different, the ends of each siphon drainage pipe extend to different underground locations. After the siphon drainage pipes 11 are installed, the soil is backfilled to cover the siphon drainage pipes and the water tank, and the ground is restored to its original state. The condensate delivery pipe 6 in this scheme serves as a water replenishment pipe, which can replenish water to the water tank in the water collection area 10.

[0045] One end of the siphon drain pipe extends from above the water collection area into the bottom of the area, while the other end extends underground. This allows water to flow upwards from the collection area and then diffuse into the surrounding lower areas through the siphon drain pipe. The diameter of the siphon drain pipe can be designed from 50-100mm. High-density polyethylene (HDPE) can be used as the material, as it is lightweight, high-strength, corrosion-resistant, chemically resistant, easy to install and maintain, has a long service life, and can adapt to a wide temperature range.

[0046] As an optional embodiment of the present invention, the condenser adopts a wind-powered condenser, which can effectively utilize wind energy in desert areas and convert it into electrical energy, saving resources and improving reliability.

[0047] In an optional embodiment of the present invention, the grouting module includes a grouting unit and several grouting pipes 7 inserted underground. The grouting unit is used to prepare and deliver the EICP solution, wherein the EICP solution is prepared by mixing urease solution and cementing fluid in a volume ratio of 1:1, and the cementing fluid is prepared by mixing 0.4-1.0 equimolar masses of CaCl2 solution and urea solution. The grouting unit includes a stirrer for preparing the EICP solution and a liquid pump for delivering the prepared EICP solution, thereby delivering the EICP solution to each grouting pipe 7 and finally injecting it into the soil.

[0048] As a further improvement to the above scheme, in order to increase the solution viscosity, 0.3-0.5% xanthan gum or Artemisia gum is added to the EICP solution as an additive. The resulting calcium carbonate precipitate can consolidate the soil and improve its water retention performance.

[0049] Specific reference Figure 2-5 As an optional embodiment of the present invention, the grouting pipe 7 includes an outer pipe 12, an inner shaft 13 coaxially rotatably disposed in the outer pipe 12, and a plurality of micro grouting pipes 22, and a plurality of pairs of micro grouting pipes 22 are distributed along the axial direction of the inner shaft 13. One end of the micro grouting pipe 22 can slide through the through hole 24 reserved on the outer pipe 12, and the micro grouting pipe 22 can be connected to the grouting unit through a conveying mechanism.

[0050] As an optional embodiment of the present invention, a portion of the micro slurry delivery tube 22 is slidably connected to the inner wall of the through hole 24. The inner end of the micro slurry delivery tube 22 is provided with a slurry inlet 23. A limit block 25 is also fixed to the outer wall of the inner end of the micro slurry delivery tube 22. Several micro slurry outlet holes are distributed at the outer end of the micro slurry delivery tube 22. The slurry inlet 23 is used to connect with the conveying mechanism.

[0051] In an optional embodiment of the present invention, a rack (not shown) is fixed to the outer wall of the micro-slurry delivery tube 22 along its length, and a transmission gear 21 that meshes with the rack is fixed to the outside of the inner shaft 13. By rotating the inner shaft 13, the transmission gear 21 can be driven to rotate, thereby causing the micro-slurry delivery tubes 22 on both sides of the transmission gear 21 to slide, ultimately allowing the end of the micro-slurry delivery tube 22 to insert into the surrounding soil, thereby enabling more uniform application of EICP solution and improving the final moisturizing effect.

[0052] As an optional embodiment of the present invention, the conveying mechanism includes a slurry delivery pipe 14 and a plurality of slurry gathering discs 18 movably sleeved on the outside of the inner shaft 13. A connector 15 is installed on the top of the slurry delivery pipe 14. One of the slurry gathering discs 18 is connected to the slurry delivery pipe 14. Adjacent slurry gathering discs 18 are connected to each other by a plurality of connecting pipes 20. The number of slurry gathering discs 18 is the same as the number of pairs of micro slurry delivery pipes 22. Two inserts 19 are fixed at the bottom of the slurry gathering disc 18 and are connected to its interior. The inserts 19 are used to connect with the slurry inlet 23 on the corresponding micro slurry delivery pipe 22 to deliver slurry into the micro slurry delivery pipe 22.

[0053] In actual operation, first lift the grout delivery pipe 14 upwards so that the insertion tube 19 at the bottom of the grout collection plate 18 is not connected to the corresponding grout inlet. Then rotate the inner shaft so that the ends of each micro grout delivery pipe 22 are inserted into the surrounding soil. Then move the grout delivery pipe 14 downwards so that the insertion tube 19 at the bottom of each grout collection plate 18 is inserted into the corresponding grout inlet 23. Then start to deliver EICP solution through the grout delivery pipe 16 connected to the connector 15. Finally, inject the EICP solution into the soil.

[0054] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A self-circulating moisture retention system for shallow desert soil, characterized in that, It includes pumping modules, cold condensate modules, grouting modules, and photovoltaic modules, among which: The water pumping module includes a water pump and a water pipe. The water pump is located on the ground, one end of the water pipe is connected to the water pump, and the other end of the water pipe is buried underground for drawing water from the ground. The cold condensate water module is used to condense water vapor in the air into liquid and then transport it underground; The grouting module is used to inject EICP solution underground to form a water-retaining layer; The photovoltaic module supplies power to this system; The cold condensate module includes a condenser and a condensate delivery pipe. The condenser is used to condense water vapor into liquid water. One end of the condensate delivery pipe is connected to the outlet end of the condenser, and the other end of the condensate delivery pipe extends into a pre-installed water collection area in a shallow aquifer. Several siphon drainage pipes connected to the water collection area are also installed in the shallow aquifer. The grouting module includes a grouting unit and several grouting pipes inserted underground. The grouting unit is used to prepare and deliver EICP solution, wherein the EICP solution is prepared by mixing urease solution and cementing solution in a volume ratio of 1:1, and the cementing solution is prepared by mixing 0.4-1.0 molar mass of CaCl2 solution and urea solution. The grouting pipe includes an outer pipe, an inner shaft coaxially rotatably disposed in the outer pipe, and several micro grout delivery pipes. Several pairs of micro grout delivery pipes are distributed along the axial direction of the inner shaft. One end of the micro grout delivery pipe can slide through a pre-reserved through hole on the outer pipe. The micro grout delivery pipe can be connected to the grout supply unit through a conveying mechanism. The micro slurry delivery tube is slidably connected to the inner wall of the through hole. The inner end of the micro slurry delivery tube is provided with a slurry inlet. A limit block is also fixed on the outer wall of the inner end of the micro slurry delivery tube. Several micro slurry outlet holes are distributed on the outer end of the micro slurry delivery tube. The slurry inlet is used to connect with the conveying mechanism. The outer wall of the micro slurry delivery tube is fixed with a rack along its length, and a transmission gear that meshes with the rack is fixed on the outer side of the inner shaft. The conveying mechanism includes a slurry delivery pipe and several slurry gathering discs movably sleeved on the outside of the inner shaft. A connector is installed on the top of the slurry delivery pipe. One of the slurry gathering discs is connected to the slurry delivery pipe. Adjacent slurry gathering discs are connected by several connecting pipes. The number of slurry gathering discs is the same as the number of micro slurry delivery pipes. Two inserts are fixed at the bottom of the slurry gathering disc and are connected to its interior. The inserts are used to connect with the slurry inlet on the corresponding micro slurry delivery pipe to deliver slurry into the micro slurry delivery pipe.

2. The desert shallow soil self-circulation moisture retention system as described in claim 1, characterized in that, The condenser is a wind-powered condenser.

3. The desert shallow soil self-circulating moisture retention system as described in claim 1, characterized in that, Add 0.3-0.5% xanthan gum or Artemisia gum to the EICP solution as an additive.

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