Taxlamay desert edge saline-alkali soil improvement system and improvement method

Abstract

The invention relates to the technical field of saline-alkali soil improvement, and discloses a system and a method for improving saline-alkali soil at the edge of a Taxlamay desert. A drainage channel; a water storage member; a backflow assembly; a first monitoring part is used for monitoring the salt content of the saline-alkali soil, and a second monitoring part is used for monitoring the mineralization degree of saline-alkali water; when the salt content of the saline-alkali soil and the mineralization degree of the saline-alkali water in the water storage part are both lower than set values, the saline-alkali soil is irrigated. Part of irrigation water and part of saline-alkali water are recycled and stored in the water storage part, irrigation is conducted through the backflow assembly, and water resources can be recycled; the monitoring assembly is adopted to monitor the salt content of the saline-alkali soil and the salinity of the saline-alkali water in the water storage part, so that only when the salt content and the salinity are lower than set values, the backflow assembly can be used for irrigation, the recycling cost of the saline-alkali water can be reduced, and accurate regulation and control of the salt content of the saline-alkali soil can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land improvement, and in particular to a saline-alkali land improvement system and method at the edge of the Taklimakan Desert. Background Art

[0002] As an inefficient land resource widely distributed around the world, saline-alkali land has a high salt content that seriously restricts crop growth and ecological restoration. Especially in the desert margins of arid areas, soil salinization and water shortage have a superimposed effect, increasing the difficulty of land restoration and utilization. The marginal areas of the Taklimakan Desert are affected by factors such as extremely dry climate, strong evaporation and high groundwater mineralization, and the secondary salinization of soil is prominent. The traditional "high water pressure salt" improvement method faces problems such as lack of freshwater resources, low salt leaching efficiency and easy salt return.

[0003] In the existing technology, soil salinity can be reduced by adopting a drainage and salt removal system, but the direct discharge of saline water causes a waste of water resources, and the saline water desalination and utilization technology requires the configuration of special equipment, resulting in high construction and operation costs; in addition, the lack of a dynamic control mechanism for the linkage between soil salinity and recycled water makes it difficult to achieve precise control of water-salt balance, which restricts the sustainability of saline-alkali land improvement. Summary of the invention

[0004] In view of this, the present invention provides a system and method for improving the saline-alkali land on the edge of the Taklimakan Desert, so as to solve the problems of large freshwater consumption, low salt leaching efficiency, high risk of salt return, insufficient salt control accuracy and high cost of saline-alkali water recycling in the existing drainage and salt removal system.

[0005] In a first aspect, the present invention provides a system for improving saline-alkali land on the edge of the Taklimakan Desert, which is used to improve saline-alkali land, comprising:

[0006] an irrigation channel, provided on at least one side of the saline-alkali land, for irrigating the saline-alkali land;

[0007] a drainage channel, provided below the surface of the saline-alkali land, for draining away the saline-alkali water;

[0008] A water storage member, disposed downstream of the saline-alkali land drainage and connected to the irrigation channel and the drainage channel, for collecting part of the irrigation water and part of the saline-alkali water;

[0009] A reflux component, connected to the water storage component, for irrigating the saline-alkali land;

[0010] The monitoring component includes a first monitoring component and a second monitoring component, wherein the first monitoring component extends below the surface of the saline-alkali land to monitor the salt content of the saline-alkali land, and the second monitoring component extends below the liquid level of the water storage component to monitor the mineralization of the saline-alkali water;

[0011] When the salt content of the saline-alkali land and the mineralization degree of the saline-alkali water in the water storage component are both lower than set values, the water storage component irrigates the saline-alkali land through the reflux component.

[0012] Beneficial effects: by irrigating saline-alkali land through irrigation channels, the salt in the soil can be quickly washed away, thereby quickly reducing the salt content of the saline-alkali land; by draining the saline-alkali water through drainage channels, the salt in the saline-alkali water can be prevented from accumulating again on the surface of the saline-alkali land under strong evaporation; by recycling and storing part of the irrigation water and part of the saline-alkali water in the water storage component, and irrigating through the reflux component, the irrigation water resources can be recycled, thereby reducing the amount of irrigation water to save water resources; by using a monitoring component to monitor the salt content of the saline-alkali land and the mineralization of the saline-alkali water in the water storage component, the reflux component can be used for irrigation only when the salt content and the mineralization are both lower than the set value, so that the saline-alkali water does not need to be desalinated before use, thereby reducing the recycling cost of the saline-alkali water, and the water supply efficiency is high, which can meet the irrigation needs and can achieve precise control of the saline-alkali land salt content.

[0013] In an optional embodiment, the drainage channel includes:

[0014] A first drainage channel, a plurality of which are provided at intervals;

[0015] The second drainage channel is communicated with the first drainage channel and the water storage member.

[0016] In an optional embodiment, drainage pipes are provided on both sides of the first drainage channel, and the drainage pipes are provided below the surface of the saline-alkali land.

[0017] Beneficial effect: By setting up the drainage pipe, the saline water after leaching the saline-alkali land can be discharged into the first drainage channel through the drainage pipe, and then collected into the second drainage channel for discharge, thereby avoiding the occurrence of secondary salinization of the soil.

[0018] In an optional embodiment, a control member is provided on the drain pipe;

[0019] The Taklimakan Desert marginal saline-alkali land improvement system comprises:

[0020] A third monitoring component extends below the surface of the saline-alkali land to monitor the height of the groundwater level of the saline-alkali land, and is used to open the control component when the height of the groundwater level of the saline-alkali land is higher than a set value.

[0021] Beneficial effects: By setting up the third monitoring component, when the groundwater level is higher than the set value, the control component can be opened for drainage to lower the groundwater level and avoid the occurrence of secondary salinization of the soil; when the groundwater level is lower than the set value, the control component is closed to conserve water to prevent excessive drainage from causing insufficient moisture in the farmland soil and causing drought.

[0022] In an optional embodiment, the Taklimakan Desert edge saline-alkali land improvement system comprises:

[0023] The material storage component is connected to the reflux component and is used for storing fertilizer.

[0024] Beneficial effects: By transporting fertilizers to saline-alkali land, nutrients in the soil can be quickly replenished, the soil fertility of the saline-alkali land can be improved, and the acid-base balance can be adjusted; by connecting the storage part with the reflux component to transport fertilizers, the structure can be simplified and transportation is facilitated.

[0025] In an optional embodiment, the Taklimakan Desert edge saline-alkali land improvement system comprises:

[0026] A dilution component is connected between the material storage component and the water storage component. The dilution component is communicated with the reflux component and is used for diluting the fertilizer and conveying it to the reflux component.

[0027] Beneficial effects: By diluting the fertilizer, it is easier to transport it through the reflux component, avoiding clogging of the reflux component due to too high concentration; by using the saline water in the water storage component to dilute the fertilizer and transporting it to the saline-alkali land through the reflux component, the saline water can be recycled while diluting the fertilizer, thereby saving water resources.

[0028] In an optional embodiment, the dilution component includes:

[0029] A first storage member, connected to the water storage member, for storing the saline water;

[0030] A second storage member, connected to the material storage member, and used for storing the fertilizer;

[0031] The permeation member is disposed between the first storage member and the second storage member, and is used for permeating water molecules of the saline water into the second storage member to dilute the fertilizer.

[0032] In an optional embodiment, the dilution component includes:

[0033] a first exchange channel, disposed between the first storage element and the permeable element;

[0034] a second exchange channel, disposed between the second storage element and the permeable element;

[0035] a first driving member, used for conveying the saline water in the first storage member to the first exchange channel;

[0036] The second driving member is used to transport the fertilizer in the second storage member to the second exchange channel.

[0037] Beneficial effect: By using the first driving member to transport the saline water in the first storage member to the first exchange channel, and using the second driving member to transport the fertilizer in the second storage member to the second exchange channel, liquid pressure can be provided for the saline water and the fertilizer, so that the saline water and the fertilizer enter the first exchange channel and the second exchange channel respectively at a faster speed, thereby improving the infiltration effect.

[0038] In an optional embodiment, the first exchange channel is connected to the drainage channel through a first pipe;

[0039] and / or, the second exchange channel is connected to the reflux assembly via a second pipe;

[0040] And / or, a heating element is provided at the bottom of the dilution component.

[0041] Beneficial effects: The saline water that has lost some water molecules is discharged through the drainage channel, which can prevent this part of the saline water from entering the water storage part, increasing the mineralization of the water storage part and making it impossible to use it for irrigation; by heating the saline water and fertilizer, the water flux of the permeable part can be increased, thereby improving the dilution efficiency of the fertilizer.

[0042] In an optional embodiment, the Taklimakan Desert edge saline-alkali land improvement system comprises:

[0043] A wind power generation assembly is arranged downstream of the drainage of the saline-alkali land;

[0044] And / or, photovoltaic power generation components are arranged downstream of the drainage of the saline-alkali land.

[0045] Beneficial effects: By installing wind power generation components and photovoltaic power generation components downstream of the saline-alkali land, it is possible to fully utilize wind energy and solar energy for power generation, thereby providing power support for the improvement of the saline-alkali land, reducing carbon emissions and protecting the environment; wind power generation components and photovoltaic power generation components can block sunlight, block wind power, reduce wind speed, and thus slow down the evaporation of water in the soil.

[0046] In an optional embodiment, the Taklimakan Desert edge saline-alkali land improvement system comprises:

[0047] The saline-alkali wetland is arranged on one side of the saline-alkali land close to the water storage component and is used to collect the saline-alkali water in the drainage channel.

[0048] Beneficial effects: By setting up saline-alkali wetlands, the further expansion of the desert area can be prevented, thereby improving the soil environment and achieving ecological restoration.

[0049] In a second aspect, the present invention further provides a method for improving saline-alkali land on the edge of the Taklimakan Desert, which is applied to the above-mentioned saline-alkali land improvement system on the edge of the Taklimakan Desert, comprising:

[0050] irrigating the saline-alkali land through the irrigation channel;

[0051] Part of the irrigation water and part of the saline-alkali water flow into the return component, and the rest is discharged to the saline-alkali wetland through the drainage channel;

[0052] When the salt content of the saline-alkali land and the mineralization degree of the saline-alkali water in the water storage component are both lower than the set value, the water storage component irrigates the saline-alkali land through the reflux component.

[0053] Beneficial effects: Because the Taklimakan Desert edge saline-alkali land improvement method is applied to the Taklimakan Desert edge saline-alkali land improvement system, it has the same effect as the Taklimakan Desert edge saline-alkali land improvement system, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] 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.

[0055] Figure 1 A top view of a system for improving saline-alkali land on the edge of the Taklimakan Desert according to an embodiment of the present invention;

[0056] Figure 2 for Figure 1 The main view of the salt-alkali land improvement system on the edge of the Taklimakan Desert is shown;

[0057] Figure 3 for Figure 1 A partial cross-sectional view of the saline-alkali land improvement system on the edge of the Taklimakan Desert is shown.

[0058] Description of reference numerals:

[0059] 1. Saline-alkali land; 2. Irrigation channel; 3. Drainage channel; 301. First drainage channel; 302. Second drainage channel; 303. Drain pipe; 304. Control part; 4. Water storage part; 401. Agitator; 5. Reflux component; 501. Drip irrigation main pipe; 502. Drip irrigation branch pipe; 6. Monitoring component; 601. First monitoring component; 602. Second monitoring component; 7. Third monitoring component; 8. Material storage component; 9. Dilution component; 901. First storage component; 902. Second storage component; 903. Permeation component; 904. First exchange channel; 905. Second exchange channel; 906. First drive component; 907. Second drive component; 908. Heating component; 10. Cover plate; 11. Wind power generation component; 12. Photovoltaic power generation component; 13. Saline-alkali wetland. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0061] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0062] According to an embodiment of the present invention, on the one hand, a Taklimakan Desert edge saline-alkali land improvement system is provided, which is used to improve saline-alkali land 1, including: an irrigation channel 2, which is arranged on at least one side of the saline-alkali land 1, and is used to irrigate the saline-alkali land 1; a drainage channel 3, which is arranged below the surface of the saline-alkali land 1, and is used to drain the saline-alkali water; a water storage component 4, which is arranged downstream of the drainage of the saline-alkali land 1 and is connected to the irrigation channel 2 and the drainage channel 3, and is used to collect part of the irrigation water and part of the saline-alkali water; a reflux component 5 , connected to the water storage component 4, for irrigating the saline-alkali land 1; the monitoring component 6, including a first monitoring component 601 and a second monitoring component 602, the first monitoring component 601 extends below the surface of the saline-alkali land 1, for monitoring the salt content of the saline-alkali land 1, and the second monitoring component 602 extends below the liquid level of the water storage component 4, for monitoring the mineralization of the saline-alkali water; when the salt content of the saline-alkali land 1 and the mineralization of the saline-alkali water in the water storage component 4 are both lower than the set values, the water storage component 4 irrigates the saline-alkali land 1 through the reflux component 5.

[0063] Irrigating the saline-alkali land 1 through the irrigation channel 2 can quickly wash away the salt in the soil, thereby quickly reducing the salt content of the saline-alkali land 1; draining the saline-alkali water through the drainage channel 3 can prevent the salt in the saline-alkali water from accumulating on the surface of the saline-alkali land 1 again under the action of strong evaporation; by recycling and storing part of the irrigation water and part of the saline-alkali water in the water storage part 4, and irrigating through the reflux component 5, the irrigation water resources can be recycled, thereby reducing the amount of irrigation water to save water resources; by using the monitoring component 6 to monitor the salt content of the saline-alkali land 1 and the mineralization of the saline-alkali water in the water storage part 4, the reflux component 5 can be used for irrigation only when the salt content and the mineralization are both lower than the set value, so that the saline-alkali water does not need to be desalinated before use, thereby reducing the recycling cost of the saline-alkali water, and the water supply efficiency is high, which can meet the irrigation needs and can achieve precise control of the salt content of the saline-alkali land 1.

[0064] In one embodiment, cotton is planted on the saline-alkali land 1 for agricultural production. As a convertible implementation, cash crops such as soybeans can also be planted on the saline-alkali land 1, and no further restrictions are made here.

[0065] like Figure 1 As shown, in one embodiment, the irrigation channels 2 are arranged on both sides of the saline-alkali land 1. As a convertible implementation, the irrigation channels 2 can also be arranged only on one side of the saline-alkali land 1, or three or four irrigation channels can be arranged at intervals, which is not too limited here.

[0066] like Figure 1-Figure 2As shown, in one embodiment, the drainage channel 3 includes: a first drainage channel 301, which is provided with a plurality of them at intervals; a second drainage channel 302, which is connected to the first drainage channel 301 and is connected to the water storage member 4. Further, drainage pipes 303 are provided on both sides of the first drainage channel 301, and the drainage pipes 303 are arranged below the surface of the saline-alkali land 1. Among them, the burial depth of the drainage pipe 303 is 1.4m, the pipe diameter is 90mm, and the laying spacing is 20m; the depth of the first drainage channel 301 is 1.6m, and the width is 2.5m; the depth of the second drainage channel 302 is 1.8m, and the width is 5m. By setting the drainage pipe 303, the saline-alkali water after elution of the saline-alkali land 1 can be discharged into the first drainage channel 301 through the drainage pipe 303, and then collected into the second drainage channel 302 for drainage, thereby avoiding the occurrence of secondary salinization of the soil. As a convertible implementation, the buried depth of the drain pipe 303 can also be 1.3m or 1.5m, and correspondingly, the depth of the first drainage channel 301 is 1.5m or 1.7m, and the depth of the second drainage channel 302 is 1.7m or 1.9m, without too many restrictions here. As a convertible implementation, the diameter of the drain pipe 303 can also be 80mm or 100mm, without too many restrictions here. As a convertible implementation, the laying spacing of the drain pipe 303 can also be 19m or 21m, without too many restrictions here. As a convertible implementation, the width of the first drainage channel 301 can also be 2.4m or 2.6m, and correspondingly, the width of the second drainage channel 302 is 4.8m or 5.2m, without too many restrictions here.

[0067] like Figure 2 As shown, in one embodiment, a control component 304 is provided on the drainage pipe 303; the Taklimakan Desert edge saline-alkali land improvement system includes: a third monitoring component 7, the third monitoring component 7 extends below the surface of the saline-alkali land 1 to monitor the groundwater level of the saline-alkali land 1, and is used to open the control component 304 when the groundwater level of the saline-alkali land 1 is higher than the set value. Among them, the control component 304 is a throttle valve; the third monitoring component 7 is a water level sensor with a buried depth of 1m. By setting the third monitoring component 7, when the groundwater level is higher than the set value, the control component 304 can be opened for drainage to reduce the groundwater level and avoid the occurrence of secondary salinization of the soil; when the groundwater level is lower than the set value, the control component 304 is closed for water conservation to prevent excessive drainage from causing insufficient moisture in the farmland soil and causing drought. As a convertible embodiment, the control component 304 can also be other liquid flow control structures such as a regulating valve, which is not too restrictive here. As a convertible implementation method, the third monitoring component 7 can also be a pressure sensor, a float switch, an ultrasonic sensor or other water level monitoring structures, and no excessive restrictions are made here.

[0068] like Figure 1As shown, in one embodiment, the water storage member 4 is connected to both the irrigation channel 2 and the drainage channel 3. As a convertible embodiment, the water storage member 4 may be connected only to the irrigation channel 2, or valves may be provided at the connection between the water storage member 4 and the irrigation channel 2 and at the connection between the water storage member 4 and the drainage channel 3 to control the ratio of irrigation water and saline water entering the water storage member 4.

[0069] like Figure 1 As shown, a stirring paddle 401 is provided in the water storage part 4. The stirring paddle 401 is driven by a motor to stir. By providing the stirring paddle 401, the irrigation water and saline water in the water storage part 4 can be mixed evenly before irrigation. As a convertible embodiment, the stirring paddle 401 may not be provided, but stirring may be performed manually before each use, or a magnetic stirrer may be used for stirring.

[0070] like Figure 1-Figure 2 As shown, in one embodiment, the return assembly 5 is a drip irrigation system. Specifically, the drip irrigation system includes: a drip irrigation main pipe 501, which is connected to the water storage member 4; and a drip irrigation branch pipe 502, which is connected to the drip irrigation main pipe 501 and is used to irrigate the saline-alkali land 1. By adopting the drip irrigation system, water can be directly transported to the roots of plants, thereby reducing the demand for water. The size of the water storage member 4 can be set smaller according to the irrigation demand, thereby reducing the occupied area and saving land resources.

[0071] In one embodiment, the first monitoring component 601 is a salinity sensor, which extends into the depth range of 1m below the surface of the saline-alkali land 1 and is arranged every 20cm. As a convertible implementation, the first monitoring component 601 can also be a salinity measuring instrument or a salinometer or other structures capable of monitoring salinity, which are not limited here.

[0072] In one embodiment, the second monitoring component 602 is a conductivity meter, which extends below the liquid level of the water storage component 4. As a convertible embodiment, the second monitoring component 602 can also be a TDS tester (i.e., a total dissolved solids tester) or other structures that can be used to monitor the mineralization of saline water, and no excessive restrictions are made here.

[0073] like Figure 1As shown, in one embodiment, the Taklimakan Desert edge saline-alkali land improvement system includes: a storage unit 8, connected to the reflux component 5, for storing fertilizer. Wherein, the fertilizer is a concentrated water-soluble fertilizer. By transporting fertilizer to the saline-alkali land 1, it is possible to quickly replenish nutrients in the soil, improve the soil fertility of the saline-alkali land 1, and adjust the acid-base balance; by connecting the storage unit 8 to the reflux component 5 to transport fertilizer, the structure can be simplified and transportation is convenient. As a convertible embodiment, it is also possible that the storage unit 8 can also be transported to the saline-alkali land 1 alone through a pipeline. As a convertible embodiment, the storage unit 8 may not be provided, but fertilization may be carried out manually or by drone. As a convertible embodiment, the fertilizer may also be other fertilizers such as organic fertilizer or compound fertilizer, and there are no excessive restrictions here.

[0074] like Figure 1-Figure 3 As shown, in one embodiment, the Taklimakan Desert edge saline-alkali land improvement system includes: a dilution component 9, connected between the material storage component 8 and the water storage component 4, and the dilution component 9 is connected to the reflux component 5, and is used to dilute the fertilizer and transport it to the reflux component 5. Among them, the dilution component 9 is arranged in the water storage component 4. By diluting the fertilizer, it is convenient to transport it through the reflux component 5, and avoid clogging the reflux component 5 due to too high concentration; by using the saline-alkali water in the water storage component 4 to dilute the fertilizer, and transporting it to the saline-alkali land 1 through the reflux component 5, the saline-alkali water can be recycled while diluting the fertilizer, thereby saving water resources. As a convertible embodiment, the dilution component 9 can also be arranged on the outside of the water storage component 4 and connected to the water storage component 4 through a water pipe.

[0075] like Figure 3 As shown, in one embodiment, the dilution component 9 includes: a first storage member 901, connected to the water storage member 4, for storing saline water; a second storage member 902, connected to the material storage member 8, for storing fertilizer; and a permeation member 903, disposed between the first storage member 901 and the second storage member 902, for permeating water molecules of the saline water into the second storage member 902 to dilute the fertilizer. The permeation member 903 is a forward osmosis membrane. When high-concentration fertilizer and low-concentration saline water flow through the forward osmosis membrane at the same time, due to the osmotic pressure difference on both sides of the forward osmosis membrane, the water molecules in the saline water will spontaneously permeate across the membrane into the fertilizer. In this process, the fertilizer is continuously diluted. As a convertible embodiment, the first storage element 901 may be connected to the irrigation channel 2, so that the permeable element 903 is not required, and a valve is provided at the connection between the first storage element 901 and the second storage element 902. By adjusting the amount of irrigation water input from the first storage element 901 to the second storage element 902, the dilution degree of the fertilizer in the second storage element 902 can be adjusted.

[0076] like Figure 3As shown, in one embodiment, the side walls of the first storage member 901 away from the second storage member 902 are all perforated meshes, and the perforated meshes are provided with two layers, and sand and gravel are filled between the two layers. Among them, the material of the perforated mesh is stainless steel; the perforations are circular perforations; the aperture of the perforations is 0.8 mm; and the particle size of the sand and gravel is 0.5 mm-10 mm. The saline-alkali water in the water storage member 4 is initially filtered through the perforated mesh and the sand and gravel before being used to dilute the fertilizer, which can prevent impurities from flowing into the first storage member 901 and causing damage to the forward osmosis membrane in the subsequent dilution of the fertilizer. As a convertible embodiment, the perforated mesh can also be provided with three or four layers, which is not too much restricted here. As a convertible embodiment, the perforated mesh can also be made of aluminum or other materials with high structural strength, which is not too much restricted here. As a convertible embodiment, the shape of the perforations can also be square or polygonal, which is not too much restricted here. As a convertible embodiment, the aperture of the perforations can also be 0.7 mm or 0.9 mm, which is not too much restricted here. As a convertible implementation, the particle size of the sand and gravel can also be 0.4 mm or 11 mm, without too many restrictions here.

[0077] like Figure 3 As shown, in one embodiment, the dilution assembly 9 includes: a first exchange channel 904, which is arranged between the first storage element 901 and the permeable element 903; a second exchange channel 905, which is arranged between the second storage element 902 and the permeable element 903; a first driving element 906, which is used to transport the saline water in the first storage element 901 to the first exchange channel 904; and a second driving element 907, which is used to transport the fertilizer in the second storage element 902 to the second exchange channel 905. Among them, the first driving element 906 is a first water pump; the second driving element 907 is a second water pump; a filter is arranged between the first driving element 906 and the first exchange channel 904; the filter is a pipeline filter with a filtering accuracy of 100-200 meshes. By using the first driving member 906 to transport the saline water in the first storage member 901 to the first exchange channel 904, and using the second driving member 907 to transport the fertilizer in the second storage member 902 to the second exchange channel 905, liquid pressure can be provided for the saline water and fertilizer, so that the saline water and fertilizer enter the first exchange channel 904 and the second exchange channel 905 at a faster speed, respectively, thereby improving the permeation effect; by using the filter element to perform secondary filtration on the saline water, it can be ensured that the saline water entering the first exchange channel 904 does not contain physical macromolecules, thereby extending the service life of the forward osmosis membrane. As a convertible embodiment, the first driving member 906 and the second driving member 907 can also be other driving structures such as hydraulic pumps, which are not too limited here. As a convertible embodiment, the filter element can also be other filtering structures such as permeable membranes, which are not too limited here. As a convertible embodiment, the filtration accuracy can also be 90 mesh or 210 mesh, which are not too limited here.

[0078] like Figure 3 As shown, in one embodiment, the first exchange channel 904 is connected to the drainage channel 3 through a first pipe; the second exchange channel 905 is connected to the reflux component 5 through a second pipe. The saline water that has lost some water molecules is discharged through the drainage channel 3, which can prevent this part of the saline water from entering the water storage unit 4, increasing the mineralization of the water storage unit 4, and making it impossible to use it for irrigation.

[0079] like Figure 3 As shown, in one embodiment, the second exchange channel 905 is connected to the second storage element 902 through the second pipe, and the second storage element 902 is connected to the reflux component 5 through the third pipe. A fourth monitoring element is provided in the second storage element 902 for monitoring the depth of the fertilizer. The fourth monitoring element is a liquid level gauge; the second pipe is a circulation pipe. Specifically, the diluted fertilizer circulates into the second storage element 902, and the fourth monitoring element monitors the liquid depth of the fertilizer. When the liquid level of the second storage element 902 is stable, the diluted fertilizer is fertilized through the third pipe; when the liquid level is unstable, the dilution is continued. By setting the fourth monitoring element, the water molecules on the side of the saline water can no longer penetrate into the fertilizer before the fertilizer is used, and then the fertilizer is fully diluted, so as to avoid the fertilizer concentration being too high, destroying the soil ploughing layer structure, affecting the growth of crops, and polluting the environment. As a convertible implementation, it is also possible that the fourth monitoring element is not provided, but the diluted fertilizer is left to stand for a period of time to ensure that the fertilizer is fully diluted before fertilization. As a convertible implementation, the fourth monitoring component may also be other liquid level monitoring structures such as a water level sensor, and no excessive restrictions are imposed here.

[0080] like Figure 3 As shown, in one embodiment, a heating element 908 is provided at the bottom of the dilution component 9. The heating element 908 is an electric heating wire, which heats the saline water and fertilizer to 40-50°C. By heating the saline water and fertilizer, the water flux of the permeable element 903 can be increased, thereby improving the dilution efficiency of the fertilizer. As a convertible embodiment, the heating element 908 can also be other heating structures such as an electromagnetic heating element, and there is no excessive restriction here. As a convertible embodiment, it can also be that the electric heating wire heats the saline water and fertilizer to 39°C or 41°C, and there is no excessive restriction here.

[0081] like Figure 3As shown, in one embodiment, the permeable member 903 is fixedly disposed between the first exchange channel 904 and the second exchange channel 905, and the permeable member 903, the first exchange channel 904 and the second exchange channel 905 together form a permeable structure, and a grip is provided on the top of the permeable structure for taking out the permeable structure for cleaning or replacement. As a convertible embodiment, it is also possible that the first exchange channel 904 and the second exchange channel 905 form a receiving cavity, and the permeable member 903 is fixed in the receiving cavity, and then only the permeable member 903 can be taken out for cleaning or replacement.

[0082] like Figure 3 As shown, in one embodiment, a cover plate 10 is provided on the top of the water storage member 4 to shield the saline-alkali water. By providing the cover plate 10, it is possible to prevent the water in the water storage member 4 from evaporating, thereby causing the mineralization of the saline-alkali water to be higher than a set value, resulting in the inability to be recycled. As a convertible embodiment, the cover plate 10 may also be not provided on the top of the water storage member 4.

[0083] like Figure 1-Figure 2 As shown, in one embodiment, the Taklimakan Desert edge saline-alkali land improvement system includes: a wind power generation component 11, which is arranged downstream of the drainage of the saline-alkali land 1; and a photovoltaic power generation component 12, which is arranged downstream of the drainage of the saline-alkali land 1. Among them, the wind power generation component 11 includes a wind turbine; and the photovoltaic power generation component 12 includes a photovoltaic panel. By arranging the wind power generation component 11 and the photovoltaic power generation component 12 downstream of the saline-alkali land 1, it is possible to fully utilize wind energy and solar energy for power generation, thereby providing power support for the improvement of the saline-alkali land 1, reducing carbon emissions, and protecting the environment; the wind power generation component 11 and the photovoltaic power generation component 12 can block sunlight, block wind power, reduce wind speed, and thereby slow down the evaporation of water in the soil. As a convertible embodiment, the downstream of the saline-alkali land 1 can also be provided with only a wind power generation component 11, or only a photovoltaic power generation component 12.

[0084] In one embodiment, dwarf jujube trees are planted below the wind power generation assembly 11 and the photovoltaic power generation assembly 12 to fix sand and retain water, thereby preventing wind and controlling sand. As a convertible implementation, halophytes such as Suaeda salsa can also be planted below the wind power generation assembly 11 and the photovoltaic power generation assembly 12.

[0085] In one embodiment, a substation is provided on one side of the wind power generation component 11 and the photovoltaic power generation component 12. A substation is provided in the substation for converting the generated electric energy. A power storage device is provided below the substation for storing the generated electric energy to provide power support for the improvement of the saline-alkali land 1, and to connect the excess electric energy to the power grid for nearby factories and residents to reduce carbon emissions and protect the environment. The substation device is an inverter and the power storage device is a battery.

[0086] In one embodiment, the Taklimakan Desert edge saline-alkali land improvement system includes: a saline-alkali wetland 13, which is arranged on one side of the saline-alkali land 1 close to the water storage part 4, and is used to collect the saline-alkali water in the drainage channel 3. Specifically, the saline-alkali water in the drainage channel 3 is discharged to the area between the saline-alkali land 1 and the edge of the desert, and halophytes are planted to form the saline-alkali wetland 13. Among them, the halophyte is Suaeda salsa. By setting up the saline-alkali wetland 13, it is possible to prevent the desert area from further expanding, thereby improving the soil environment and achieving ecological restoration. As a convertible embodiment, the halophyte can also be other halophytes such as Salicornia herba or mangroves.

[0087] According to an embodiment of the present invention, on the other hand, a method for improving saline-alkali land on the edge of the Taklimakan Desert is also provided, which is applied to the above-mentioned saline-alkali land improvement system on the edge of the Taklimakan Desert, including: irrigating the saline-alkali land 1 through the irrigation channel 2; part of the irrigation water and part of the saline-alkali water flow into the reflux component 5, and the rest is discharged to the saline-alkali wetland 13 through the drainage channel 3; when the salt content of the saline-alkali land 1 and the mineralization of the saline-alkali water in the water storage component 4 are lower than the set value, the water storage component 4 irrigates the saline-alkali land 1 through the reflux component 5.

[0088] Furthermore, when the salt content of the saline-alkali land 1 or the mineralization degree of the saline-alkali water in the water storage component 4 is higher than a set value, the water storage component 4 is closed, and the saline-alkali land 1 is irrigated through the irrigation channel 2 .

[0089] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A system for improving saline-alkali land on the edge of the Taklimakan Desert, used for improving saline-alkali land (1), characterized in that: include: An irrigation channel (2) is provided on at least one side of the saline-alkali land (1) and is used for irrigating the saline-alkali land (1); A drainage channel (3) is provided below the surface of the saline-alkali land (1) and is used to drain the saline-alkali water; A water storage member (4) is disposed downstream of the drainage of the saline-alkali land (1) and is connected to the irrigation channel (2) and the drainage channel (3) and is used to collect part of the irrigation water and part of the saline-alkali water; A reflux component (5) is connected to the water storage component (4) and is used for irrigating the saline-alkali land (1); The monitoring component (6) comprises a first monitoring component (601) and a second monitoring component (602), wherein the first monitoring component (601) extends below the surface of the saline-alkali land (1) to monitor the salt content of the saline-alkali land (1), and the second monitoring component (602) extends below the liquid level of the water storage component (4) to monitor the mineralization of the saline-alkali water; When the salt content of the saline-alkali land (1) and the mineralization degree of the saline-alkali water in the water storage component (4) are both lower than set values, the water storage component (4) irrigates the saline-alkali land (1) through the reflux component (5).

2. The Taklimakan Desert edge saline-alkali land improvement system according to claim 1, characterized in that: The drainage channel (3) comprises: A first drainage channel (301), with a plurality of channels arranged at intervals; The second drainage channel (302) is in communication with the first drainage channel (301) and is also in communication with the water storage element (4).

3. The Taklimakan Desert edge saline-alkali land improvement system according to claim 2, characterized in that: Drain pipes (303) are provided on both sides of the first drainage channel (301), and the drainage pipes (303) are arranged below the surface of the saline-alkali land (1).

4. The Taklimakan Desert edge saline-alkali land improvement system according to claim 3, characterized in that: The drain pipe (303) is provided with a control component (304); The Taklimakan Desert marginal saline-alkali land improvement system comprises: A third monitoring component (7), the third monitoring component (7) extends below the surface of the saline-alkali land (1) to monitor the height of the underground water level of the saline-alkali land (1), and is used to open the control component (304) when the height of the underground water level of the saline-alkali land (1) is higher than a set value.

5. The Taklimakan Desert marginal saline-alkali land improvement system according to any one of claims 1 to 4, characterized in that: The Taklimakan Desert marginal saline-alkali land improvement system comprises: A storage component (8) is connected to the reflux component (5) and is used for storing fertilizer.

6. The Taklimakan Desert edge saline-alkali land improvement system according to claim 5, characterized in that: The Taklimakan Desert marginal saline-alkali land improvement system comprises: A dilution component (9) is connected between the material storage component (8) and the water storage component (4). The dilution component (9) is in communication with the reflux component (5) and is used to dilute the fertilizer and then transport it to the reflux component (5).

7. The Taklimakan Desert edge saline-alkali land improvement system according to claim 6, characterized in that: The dilution component (9) comprises: A first storage element (901), connected to the water storage element (4), and used for storing the saline water; A second storage member (902), connected to the material storage member (8), and used for storing the fertilizer; The permeation element (903) is disposed between the first storage element (901) and the second storage element (902) and is used to permeate water molecules of the saline water into the second storage element (902) to dilute the fertilizer.

8. The Taklimakan Desert edge saline-alkali land improvement system according to claim 7, characterized in that: The dilution component (9) comprises: A first exchange channel (904) is provided between the first storage element (901) and the permeable element (903); A second exchange channel (905) is provided between the second storage element (902) and the permeable element (903); A first driving member (906) is used to transport the saline water in the first storage member (901) to the first exchange channel (904); The second driving member (907) is used to transport the fertilizer in the second storage member (902) to the second exchange channel (905).

9. The Taklimakan Desert edge saline-alkali land improvement system according to claim 8, characterized in that: The first exchange channel (904) is connected to the drainage channel (3) via a first pipe; and / or, the second exchange channel (905) is connected to the reflux component (5) via a second pipeline; And / or, a heating element (908) is provided at the bottom of the dilution component (9).

10. The Taklimakan Desert marginal saline-alkali land improvement system according to any one of claims 1 to 4, characterized in that: The Taklimakan Desert marginal saline-alkali land improvement system comprises: A wind power generation component (11) is arranged downstream of the drainage of the saline-alkali land (1); And / or, the photovoltaic power generation assembly (12) is arranged downstream of the drainage of the saline-alkali land (1).

11. The Taklimakan Desert marginal saline-alkali land improvement system according to any one of claims 1 to 4, characterized in that: The Taklimakan Desert marginal saline-alkali land improvement system comprises: The saline-alkali wetland (13) is arranged on a side of the saline-alkali land (1) close to the water storage member (4) and is used to collect the saline-alkali water in the drainage channel (3).

12. A method for improving saline-alkali land on the edge of the Taklimakan Desert, applied to the system for improving saline-alkali land on the edge of the Taklimakan Desert according to any one of claims 1 to 11, characterized in that: include: irrigating the saline-alkali land (1) through the irrigation channel (2); Part of the irrigation water and part of the saline-alkali water flow into the return component (5), and the rest is discharged to the saline-alkali wetland (13) through the drainage channel (3); When the salt content of the saline-alkali land (1) and the mineralization degree of the saline-alkali water in the water storage component (4) are both lower than the set value, the water storage component (4) irrigates the saline-alkali land (1) through the reflux component (5).

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