Irrigation and drainage system and method for restoring saline-alkali land ecology

Abstract

The present invention relates to an irrigation and drainage system and method for repairing saline-alkali land ecology, and relates to the technical field of saline-alkali land repair, including multiple groups of irrigation water pipes horizontally buried in the land, a transfer water pipe horizontally buried in the land and vertically connected to the irrigation water pipe, a water inlet pipe vertically arranged at the upper side end of the transfer water pipe and extending to the upper side of the surface, two groups of water collecting and draining pipes arranged at the lower side of the irrigation water pipe and collecting irrigation wastewater, a drainage pipe arranged at one end of the water collecting and draining pipe, and a salt analyzer arranged on the ground, the irrigation water pipe is provided with multiple groups of irrigation holes along its length direction, the upper side end of the water collecting and draining pipe is provided with multiple water collecting holes along its length direction, the water collecting and draining pipe is provided with a water filter membrane at the water collecting hole, and one end of the water inlet pipe and the drainage pipe are respectively connected to the salt analyzer. Its beneficial effect is that the land is layered underground by the irrigation and drainage system, and even if the surface temperature of the land rises, the salt in the lower soil cannot be sucked up, thereby further improving the treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of saline-alkali land restoration, and in particular to an irrigation and drainage system and a method thereof for restoring saline-alkali land ecology. Background Art

[0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares are in my country. The formation of alkaline soil and alkaline soil in my country is mostly related to the accumulation of carbonates in the soil, so the alkalinity is generally high, and plants can hardly survive in areas with severe saline-alkali soil.

[0003] Since the types, causes and climate characteristics of saline-alkali land in different provinces are different, the technologies and methods for improving and utilizing saline-alkali land are also different. Starting from curbing the causes of saline-alkali land, my country has formed more than 40 practical technologies suitable for saline-alkali land management and efficient agricultural utilization in 8 major systems, including water conservancy engineering, biology, agronomy, and chemistry. Engineering measures include irrigation and salt washing, open ditch or concealed pipe drainage projects; biological measures include adjusting agricultural structure, rationally arranging crops, and planting salt-tolerant varieties; agricultural measures include land leveling, deep plowing, salt pressing with imported soil, and sand pressing improvement; chemical measures include applying soil conditioners. From the practical situation, various saline-alkali land improvement measures have their own advantages and disadvantages. For example, draining salt through water conservancy engineering methods and introducing fresh water irrigation and salt washing can reduce soil salinity and accelerate saline-alkali land improvement.

[0004] Conventional irrigation for salt washing usually involves manual watering of the land. Once the soil temperature continues to rise, the salt washed into the deep soil will be absorbed to the soil surface, thus losing its effect and easily causing the saline-alkali land to recover, thus affecting the growing plants. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an irrigation and drainage system and method for repairing the ecology of saline-alkali land, which solves the technical problem that salt moves upward due to land temperature rise and affects growing plants.

[0007] (II) Technical solution

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] In a first aspect, an embodiment of the present invention provides an irrigation and drainage system for restoring the ecology of saline-alkali land, comprising a plurality of irrigation water pipes horizontally buried in the soil, a transfer water pipe horizontally buried in the soil and vertically connected to the irrigation water pipes, a water inlet pipe vertically arranged at the upper end of the transfer water pipe and extending to the upper side of the ground surface, two groups of water collection and drainage pipes arranged at the lower side of the irrigation water pipe and collecting irrigation wastewater, a drainage pipe arranged at one end of the water collection and drainage pipe, and a salt analyzer arranged on the ground, wherein each group of the irrigation water pipes is located on the same horizontal line, and the plurality of groups The irrigation water pipes are arranged at intervals from top to bottom, and a plurality of groups of irrigation holes are provided along the length direction of the irrigation water pipes. Each group of irrigation holes includes a plurality of holes evenly distributed circumferentially on the circumferential side ends of the irrigation water pipes. Each group of water collecting and draining pipes includes a plurality of pipes. Two groups of water collecting and draining pipes are arranged at intervals one above and one below. A plurality of water collecting holes are provided on the upper side ends of the water collecting and draining pipes along the length direction of the water collecting and draining pipes. A water filter membrane is provided at the water collecting holes. One end of the water inlet pipe and the drain pipe extends to the ground and are respectively connected to the salt analyzer.

[0010] An irrigation and drainage system for repairing the ecology of saline-alkali land proposed in an embodiment of the present invention, when the irrigation and drainage system is used to treat the ecology of saline-alkali land, in step one, water without salt flows in along the water inlet pipe, flows into all the irrigation water pipes through the transfer water pipe, and the water drips out along the irrigation holes at the side ends of the irrigation water pipes; in step two, the dripping water dissolves in the soil and combines with the salt in the soil. When a large amount of water accumulates in the soil, it will infiltrate under the action of gravity, thereby carrying the salt in the soil away from the upper soil layer; in step three, the water containing salt infiltrates to the upper side of the water collection and drainage pipe , and flows into the water collection pipe along the water collection hole, and the water in the water collection pipe is discharged through the drain pipe; Step 4, the water discharged from the drain pipe will directly flow into the salt analyzer, the salt analyzer will analyze the salt in the brine, so that the salt-free water flows out from the water inlet pipe, thus forming a cycle to complete the ecological restoration of the saline-alkali land. This solution makes the governance process sustainable and improves the governance effect. At the same time, the irrigation and drainage system stratifies the land underground. Even if the surface temperature of the land rises, the salt in the lower soil cannot be absorbed, thereby further improving the governance effect.

[0011] Optionally, the salt extractor includes a brine collection pool connected to the drain pipe, an evaporation tray arranged on one side of the brine collection pool and connected to the brine collection pool, a high-temperature evaporation table arranged at the lower end of the evaporation tray, a condensation collection plate inclined at the top of the evaporation tray, a downflow plate vertically arranged at the lowest side end of the condensation collection plate, and a fresh water collection pool arranged at the lower end of the downflow plate, an evaporation tank for accommodating a small amount of brine is opened at the upper end of the evaporation tray, the brine collection pool continuously injects brine into the evaporation tank, and one end of the water inlet pipe is connected to the fresh water collection pool.

[0012] The salt water from which the salt is precipitated from the soil is collected and poured into a salt water collection pool, and then part of the salt water in the salt water collection pool is pumped out onto an evaporation plate, and the evaporation plate is heated by a high-temperature evaporation table, so that the salt water in the evaporation tank evaporates quickly, wherein the water vapor floats up to contact the condensation collection plate and condenses into water droplets, and then flows along the downstream plate to the fresh water collection pool for collection, while the salt will crystallize and remain in the evaporation tank, and the fresh water in the fresh water collection pool will be injected through the water inlet pipe again, thus forming a cycle. This solution makes the precipitation of salt more convenient and faster.

[0013] Optionally, a cooling platform for cooling the brine collection pool and the internal brine is provided at the lower end of the brine collection pool, and a heat conduction plate connected to the condensation collection plate is provided at the side end of the brine collection pool.

[0014] By setting a cooling platform at the lower end of the brine collection pool, the cooling platform can cool the brine collection pool and the brine inside. The solubility of salt in water can be reduced by cooling, so that part of the salt in the brine can directly form crystals at the bottom, thereby further enhancing the precipitation of salt.

[0015] Optionally, an arc-shaped plate pointing downward is provided at the peripheral side end of the condensation collection plate, and the lower side end of the arc-shaped plate is bent inward to form a water flow channel, and both ends of the water flow channel are respectively connected to the downstream plate.

[0016] By arranging an arc-shaped arc plate at the circumferential end of the condensation collection plate, a whole cover is formed on the upper side of the evaporation plate, thereby ensuring that the steam does not flow out. After the steam condenses on the inner wall of the arc plate, it flows down along the inner wall of the arc plate to the water flow channel, and finally flows along the water flow channel to the downstream plate, and finally enters the fresh water collection pool. This solution makes the salt water separation more thorough and more convenient.

[0017] Optionally, a rotating bracket is provided on one side of the brine collection pool, the evaporation disk is rotatably connected to the rotating bracket, the rotation axis of the evaporation disk is horizontal and passes through the center of the evaporation disk, and the rotating bracket is provided with a salt receiving cylinder on the lower side of the evaporation disk.

[0018] By setting a rotating bracket on one side of the brine collection pool, the evaporation plate is rotatably connected to the rotating bracket. After evaporating the brine multiple times, the salt will crystallize at the bottom of the evaporation tank. If evaporation continues, the salt precipitation efficiency will be affected. At this time, the evaporation plate can be rotated so that the opening of the evaporation tank is vertically downward, and then the evaporation plate is knocked to make the crystallized salt at the bottom of the evaporation tank fall into the salt receiving cylinder on the lower side. Then the evaporation plate is rotated 180 degrees and the evaporation work is continued. This solution ensures the efficiency of salt precipitation.

[0019] Optionally, a float valve is provided in the brine collection pool, and a water supply hose partially inserted into the brine is provided on the float valve, the other end of the water supply hose extends to the upper side of the evaporation disk and is vertically fixed to the middle of the condensation collection plate, and the end of the water supply hose away from the float valve drips brine into the evaporation tank.

[0020] By setting a float valve in the brine collection pool, fixing one end of the water supply hose to the float valve and partially inserting it into the brine in the brine collection pool, the brine extracted by the water supply hose is the upper brine in the brine collection pool. The brine gradually crystallizes at the bottom of the brine collection pool during the cooling process, and the salt content in the upper brine is lower, so as to ensure that the extracted brine is the brine with reduced salt content in the brine collection pool, which is convenient for subsequent evaporation and precipitation work. The other end of the water supply hose is fixed to the middle of the condensation collection plate, so that the brine can be dripped into the evaporation disk through the water supply hose without affecting the normal rotation of the evaporation disk, which is more convenient.

[0021] Optionally, the evaporation plate is coated with a non-stick coating on the inner wall of the evaporation tank, and a vibrator is arranged at the side end of the evaporation plate.

[0022] By coating the inner wall of the evaporation tank with a non-stick coating, salt crystals can fall off more easily after reaching the bottom of the evaporation tank. At the same time, a vibrator is arranged on the side end of the evaporation plate, so that when the evaporation plate is rotated to the evaporation tank vertically downward, the vibrator can be started to vibrate the evaporation plate, thereby shaking off the salt crystals. This solution makes the process of salt crystal shedding more convenient and faster.

[0023] Optionally, the brine collection pool includes a pool frame, a pool bottom rotatably connected to the pool frame, and a pool body arranged on the pool frame, the rotation axis of the pool bottom is horizontal, the upper edge of the pool bottom is in an arc shape with its own rotation axis as the axis center, the lower edge of the pool body is aligned with the upper edge of the pool bottom, a circle of sealing rings is arranged on the lower edge of the pool body, and the pool bottom is connected to the pool body with a rotating seal.

[0024] The salt water collection pool is divided into a pool frame, a pool body and a pool bottom, and the pool bottom is rotatably connected to the pool frame. The pool bottom can be rotated to an opening that is vertically upward and aligned with a sealing ring at the lower edge of the pool body, thereby receiving the salt water. The pool bottom can also be rotated to an opening that is vertically downward, at which time the crystallized salt in the pool bottom can be poured out. This solution makes the precipitation and pouring of the salt more convenient.

[0025] Optionally, the cross-section of the water collecting and draining pipe is horizontally arranged in a waist shape, the water collecting hole is waist-shaped, and the water collecting hole is expanded from the inside to the outside of the water collecting and draining pipe.

[0026] By setting the cross-section of the water collection and drainage pipe to a waist shape and setting the water collection hole to a waist shape, the fresh water dripped into the soil can enter the water collection and drainage pipe along the water collection hole more quickly and conveniently after dissolving the salt in the soil, thereby speeding up the efficiency of irrigation and drainage.

[0027] In a second aspect, an embodiment of the present invention provides an irrigation and drainage method for repairing the ecology of saline-alkali land, comprising: step one, salt-free water flows in along an inlet pipe, flows into all irrigation water pipes through a transfer water pipe, and the water drips out along the irrigation holes at the peripheral ends of the irrigation water pipes; step two, the dripping water dissolves in the soil and combines with the salt in the soil. When a large amount of water accumulates in the soil, it will infiltrate under the action of gravity, thereby carrying the salt in the soil away from the upper soil; step three, the salt-containing water infiltrates to the upper side of the water collection and drainage pipe, and flows into the water collection and drainage pipe along the water collection holes, and the water in the water collection and drainage pipe is then discharged through the drain pipe; step four, the water discharged from the drain pipe will directly flow into the salt analyzer, which analyzes the salt in the brine, so that the salt-free water flows out from the inlet pipe, thereby forming a cycle to complete the ecological restoration of the saline-alkali land.

[0028] This underground irrigation and drainage method can more conveniently and quickly analyze the salt in the underground soil. At the same time, the irrigation and drainage system forms layers of land underground. Even if the surface temperature of the land rises, the salt in the lower soil cannot be absorbed, thereby further improving the control effect.

[0029] (III) Beneficial effects

[0030] The beneficial effects of the present invention are as follows: the irrigation and drainage system and method for restoring the ecology of saline-alkali land of the present invention, when the irrigation and drainage system is used to treat the ecology of saline-alkali land, in step one, the water without salt flows in along the water inlet pipe, flows into all the irrigation water pipes through the transfer water pipe, and the water drips out along the irrigation holes at the side ends of the irrigation water pipes; in step two, the dripping water dissolves in the soil and combines with the salt in the soil. When the water accumulates more in the soil, it will infiltrate under the action of gravity, thereby taking the salt in the soil away from the upper soil layer; in step three, the water containing salt infiltrates to the water collection and drainage. The water flows along the water collecting hole into the water collecting pipe, and the water in the water collecting pipe is discharged through the drain pipe; Step 4: the water discharged from the drain pipe will directly flow into the salt analyzer, which will analyze the salt in the brine, so that the salt-free water flows out from the water inlet pipe, thus forming a cycle to complete the ecological restoration of the saline-alkali land. This solution makes the treatment process sustainable and improves the treatment effect. At the same time, the irrigation and drainage system stratifies the land underground. Even if the surface temperature of the land rises, the salt in the lower soil cannot be absorbed, thereby further improving the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of a three-dimensional structure of an embodiment of the present invention from a second viewing angle;

[0033] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0034] Figure 4 It is a partial explosion schematic diagram of an embodiment of the present invention.

[0035] [Description of Reference Numerals]

[0036] 1. Irrigation water pipe; 11. Irrigation hole; 2. Transfer water pipe; 3. Water inlet pipe; 4. Water collection and drainage pipe; 41. Water collection hole; 42. Water filter membrane; 5. Drain pipe; 6. Salt analyzer; 61. Brine collection tank; 611. Float valve; 612. Water supply hose; 613. Pool frame; 614. Pool bottom; 615. Pool body; 6151. Sealing ring; 62. Evaporation plate; 621. Evaporation tank; 63. High-temperature evaporation table; 64. Condensation collection plate; 641. Arc plate; 642. Water flow channel; 643. Rotating bracket; 644. Salt receiving tube; 645. Vibrator; 65. Downstream plate; 66. Fresh water collection tank; 67. Cooling table; 68. Heat transfer plate. DETAILED DESCRIPTION

[0037] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0038] The irrigation and drainage system and method for restoring the ecology of saline-alkali land proposed in the embodiment of the present invention, when the irrigation and drainage system is used to treat the ecology of saline-alkali land, step one, the water without salt flows in along the water inlet pipe, flows into all the irrigation water pipes through the transfer water pipe, and the water drips out along the irrigation holes at the side ends of the irrigation water pipes; step two, the dripping water dissolves in the land and combines with the salt in the land. When the water accumulates more in the land, it will infiltrate under the action of gravity, thereby carrying the salt in the land away from the upper soil; step three, the water containing salt infiltrates to the water collection and drainage pipe side, and flows into the water collection pipe along the water collection hole, and the water in the water collection pipe is discharged through the drain pipe; step four, the water discharged from the drain pipe will directly flow into the salt analyzer, the salt analyzer will analyze the salt in the brine, so that the salt-free water flows out from the water inlet pipe, thus forming a cycle to complete the ecological restoration of the saline-alkali land. This solution makes the treatment process sustainable and improves the treatment effect. At the same time, the irrigation and drainage system stratifies the land underground. Even if the surface temperature of the land rises, the salt in the lower soil cannot be absorbed, thereby further improving the treatment effect.

[0039] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0040] Reference Figure 1 and Figure 2 , an irrigation and drainage system for repairing the ecology of saline-alkali land, comprising a plurality of irrigation water pipes 1 horizontally buried in the soil, a transfer water pipe 2 horizontally buried in the soil and vertically connected to the irrigation water pipe 1, a water inlet pipe 3 vertically connected to the upper end of the transfer water pipe 2 and extending to the upper side of the ground surface, two groups of water collecting and draining pipes 4 arranged at the lower side of the irrigation water pipe 1 and collecting irrigation wastewater, a drainage pipe 5 arranged at one end of the water collecting and draining pipe 4 and a salt analyzer 6 arranged on the ground.

[0041] Each group of irrigation water pipes 1 is located on the same horizontal line and is distributed at intervals. Multiple groups of irrigation water pipes 1 are arranged at intervals from top to bottom. The irrigation water pipes 1 have multiple groups of irrigation holes 11 along their own length direction. Each group of irrigation holes 11 includes multiple holes 11 that are evenly distributed circumferentially on the side ends of the irrigation water pipes 1. Each group of water collecting and draining pipes 4 includes multiple pipes. The two groups of water collecting and draining pipes 4 are arranged at intervals one above and one below. The upper side ends of the water collecting and draining pipes 4 are provided with multiple water collecting holes 41 along their own length direction. The water collecting and draining pipes 4 are provided with water filter membranes 42 at the water collecting holes 41. The cross-section of the water collecting and draining pipes 4 is horizontally waist-shaped, and the water collecting holes 41 are waist-shaped. The water collecting holes 41 are expanded from the inside to the outside of the water collecting and draining pipes 4. One end of the water inlet pipe 3 and the drain pipe 5 extend to the ground and are respectively connected to the salt analyzer 6.

[0042] See also Figure 1 and Figure 3The salt extractor 6 includes a salt water collection pool 61 connected to the drain pipe 5, an evaporation plate 62 arranged on one side of the salt water collection pool 61 and connected to the salt water collection pool 61, a high-temperature evaporation table 63 arranged at the lower end of the evaporation plate 62, a condensation collection plate 64 inclined at the top of the evaporation plate 62, a downflow plate 65 vertically arranged at the lowest side end of the condensation collection plate 64, and a fresh water collection pool 66 arranged at the lower end of the downflow plate 65. An evaporation tank 621 for accommodating a small amount of salt water is opened at the upper end of the evaporation plate 62. The salt water collection pool 61 continuously injects salt water into the evaporation tank 621, and one end of the water inlet pipe 3 is connected to the fresh water collection pool 66. The brine from which the salt is precipitated from the soil is collected and poured into a brine collection pool 61, and then part of the brine in the brine collection pool 61 is pumped out onto an evaporation plate 62, and the evaporation plate 62 is heated by a high-temperature evaporation table 63, so that the brine in the evaporation tank 621 evaporates quickly, wherein the water vapor floats up to contact the condensation collection plate 64 and condenses into water droplets, and then flows along the downstream plate 65 to the fresh water collection pool 66 for collection, while the salt will crystallize and remain in the evaporation tank 621, and the fresh water in the fresh water collection pool 66 will be injected through the water inlet pipe 3, thus forming a cycle.

[0043] See also Figure 1 and Figure 2 The salt water collection pool 61 includes a pool frame 613, a pool bottom 614 rotatably connected to the pool frame 613 through a rotating shaft, and a pool body 615 fixed to the pool frame 613 through bolts. The rotation axis of the pool bottom 614 is horizontal, and the upper edge of the pool bottom 614 is in an arc shape with the axis of its own rotation axis as the axis center. The lower edge of the pool body 615 is aligned with the upper edge of the pool bottom 614. A circle of sealing ring 6151 is bonded to the lower edge of the pool body 615. The pool bottom 614 is connected to the pool body 615 with a rotating seal. A cooling platform 67 for cooling the salt water collection pool 61 and the internal salt water is fixed to the lower end of the pool bottom 614 through bolts. The cooling platform 67 can cool the brine collection pool 61 and the brine inside. The solubility of salt in water can be reduced by cooling, so that part of the salt in the brine can form crystals directly inside the pool bottom 614. The pool bottom 614 can be rotated to the opening vertically upward and aligned with the sealing ring 6151 at the lower edge of the pool body 615, so as to receive the brine. The pool bottom 614 can also be rotated to the opening vertically downward, at which time the crystallized salt in the pool bottom 614 can be poured out.

[0044] See also Figure 3 and Figure 4The condensation collection plate 64 is integrally provided with an arc-shaped arc plate 641 which is downwardly arc-shaped. The lower side of the arc plate 641 is bent inward to form a water flow channel 642. The two ends of the water flow channel 642 are respectively connected to the downstream plate 65. The side end of the salt water collection pool 61 is welded with a heat conducting plate 68 connected to the condensation collection plate 64. By providing the arc-shaped arc plate 641 at the circumferential side end of the condensation collection plate 64, a whole cover is formed on the upper side of the evaporation plate 62, thereby ensuring that the steam does not flow out. After the steam condenses on the inner wall of the arc plate 641, it flows down along the inner wall of the arc plate 641 to the water flow channel 642, and finally flows along the water flow channel 642 to the downstream plate 65, and finally enters the fresh water collection pool 66. At the same time, the heat conducting plate 68 can drive the condensation collection plate 64 and the arc plate 641 to cool down, thereby achieving better condensation.

[0045] A rotating bracket 643 is provided on one side of the salt water collection pool 61, and the evaporation plate 62 is rotatably connected to the rotating bracket 643 through a rotating shaft. The rotating axis of the evaporation plate 62 is horizontal and passes through the center of the evaporation plate 62. The rotating bracket 643 is fixed with a salt receiving cylinder 644 on the lower side of the evaporation plate 62 by bolts. After evaporating the salt water for many times, the salt will crystallize at the bottom of the evaporation tank 621. If the evaporation continues, the precipitation efficiency of the salt will be affected. At this time, the evaporation plate 62 can be rotated so that the opening of the evaporation tank 621 is vertically downward, and then the evaporation plate 62 is knocked so that the crystallized salt at the bottom of the evaporation tank 621 falls into the salt receiving cylinder 644 on the lower side, and then the evaporation plate 62 is rotated 180 degrees to continue the evaporation work.

[0046] The evaporation plate 62 is coated with a non-stick coating on the inner wall of the evaporation tank 621, and a vibrator 645 is fixed to the side end of the evaporation plate 62 by bolts. By coating the non-stick coating on the inner wall of the evaporation tank 621, the salt crystals can be more easily removed after being deposited at the bottom of the evaporation tank 621. At the same time, the vibrator 645 is arranged on the side end of the evaporation plate 62, so that when the evaporation plate 62 is rotated to the evaporation tank 621 vertically downward, the vibrator 645 can be activated to vibrate the evaporation plate 62, thereby shaking off the salt crystals.

[0047] A float valve 611 is provided in the salt water collection pool 61. The float valve 611 floats on the surface of the salt water. A water supply hose 612 partially inserted into the salt water is provided on the float valve 611. The other end of the water supply hose 612 extends to the upper side of the evaporation plate 62 and is vertically fixed in the middle of the condensation collection plate 64. The end of the water supply hose 612 away from the float valve 611 drips salt water into the evaporation tank 621. The salt water extracted by the water supply hose 612 is the upper layer of salt water in the salt water collection pool 61. The salt water gradually crystallizes at the bottom of the salt water collection pool 61 during the cooling process. The salt content in the upper layer of salt water is lower, so as to ensure that the extracted salt water is the salt water with reduced salt content in the salt water collection pool 61, which is convenient for subsequent evaporation and precipitation work. The other end of the water supply hose 612 is fixed in the middle of the condensation collection plate 64, so that the salt water can be dripped into the evaporation plate 62 through the water supply hose 612 without affecting the normal rotation of the evaporation plate 62, which is more convenient.

[0048] When the irrigation and drainage system is used for irrigation and drainage, in step 1, the water without salt flows in along the water inlet pipe 3, flows into all the irrigation water pipes 1 through the transfer water pipe 2, and the water drips out along the irrigation holes 11 at the side ends of the irrigation water pipes 1; in step 2, the dripping water dissolves in the soil and combines with the salt in the soil. When the water accumulates more in the soil, it will infiltrate under the action of gravity, thereby taking the salt in the soil away from the upper soil; in step 3, the water containing salt infiltrates to the upper side of the water collection and drainage pipe 4, and flows along the water collection and drainage pipe 4. The water in the water collecting and draining pipe 4 flows into the hole 41, and the water in the water collecting and draining pipe 4 is discharged through the drain pipe 5; Step 4, the water discharged from the drain pipe 5 is poured into the salt water collecting pool 61, and the cooling platform 67 of the pool bottom 614 works at this time, so as to cool the entire salt water collecting pool 61 and the internal salt water. The solubility of the salt in the water can be reduced by cooling, so that part of the salt in the salt water directly forms crystals inside the pool bottom 614. When more salt crystals are deposited in the pool bottom 614, the pool can be rotated after the salt water is discharged. The bottom 614 is vertically downward to the opening. At this time, the crystallized salt in the pool bottom 614 can be poured out, and the salt water in the salt water collection pool 61 is partially drawn out to the evaporation plate 62. The evaporation plate 62 is heated by the high-temperature evaporation table 63, so that the salt water in the evaporation tank 621 evaporates quickly, wherein the water vapor floats up to contact the condensation collection plate 64 and the arc plate 641, and then condenses into water droplets, and then flows along the downstream plate 65 to the fresh water collection pool 66 for collection, and the salt will be crystallized and remain in the evaporation tank 621. After the brine is evaporated for the first time, if evaporation continues, the salt precipitation efficiency will be affected. At this time, the evaporation plate 62 can be rotated so that the opening of the evaporation tank 621 is vertically downward, and then the evaporation plate 62 is vibrated by the vibrator 645 to make the crystallized salt at the bottom of the evaporation tank 621 fall into the salt receiving cylinder 644 on the lower side. Then, the evaporation plate 62 is rotated 180 degrees and the evaporation work is continued. At the same time, the fresh water in the fresh water collection pool 66 will be injected through the water inlet pipe 3, thereby forming a cycle to complete the ecological restoration of the saline-alkali land.

[0049] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0052] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An irrigation and drainage system for restoring saline-alkali land ecology, characterized in that: The invention comprises a plurality of irrigation water pipes (1) horizontally buried in the soil, a transfer water pipe (2) horizontally buried in the soil and vertically connected to the irrigation water pipe (1), a water inlet pipe (3) vertically arranged at the upper end of the transfer water pipe (2) and extending to the upper side of the ground surface, two groups of water collection and drainage pipes (4) arranged at the lower side of the irrigation water pipe (1) and collecting irrigation waste water, a drainage pipe (5) arranged at one end of the water collection and drainage pipe (4), and a salt analyzer (6) arranged on the ground, each group of the irrigation water pipes (1) is located on the same horizontal line, and the plurality of irrigation water pipes (1) are arranged at intervals from top to bottom. The irrigation water pipe (1) is provided with a plurality of irrigation holes (11) along its length direction, each group of irrigation holes (11) includes a plurality of holes evenly spaced around the circumferential side ends of the irrigation water pipe (1), each group of the water collecting and draining pipes (4) includes a plurality of pipes, and the two groups of the water collecting and draining pipes (4) are arranged one above the other and spaced apart from each other. The upper side ends of the water collecting and draining pipes (4) are provided with a plurality of water collecting holes (41) along their length direction, and the water collecting and draining pipes (4) are provided with a water filter membrane (42) at the water collecting holes (41). One end of the water inlet pipe (3) and the drainage pipe (5) extend to the ground and are respectively connected to the water collecting and draining pipes (4). The salt extractor (6) comprises a salt water collection pool (61) connected to the drain pipe (5), an evaporation plate (62) arranged on one side of the salt water collection pool (61) and connected to the salt water collection pool (61), a high-temperature evaporation table (63) arranged at the lower end of the evaporation plate (62), a condensation collection plate (64) arranged obliquely at the top of the evaporation plate (62), a downflow plate (65) arranged vertically at the lowest side end of the condensation collection plate (64), and a fresh water collection pool (66) arranged at the lower end of the downflow plate (65), wherein the evaporation plate (62) ) is provided with an evaporation tank (621) for accommodating a small amount of brine at the upper end, the brine collection pool (61) continuously injects brine into the evaporation tank (621), one end of the water inlet pipe (3) is connected to the fresh water collection pool (66), a rotating bracket (643) is provided on one side of the brine collection pool (61), the evaporation disk (62) is rotatably connected to the rotating bracket (643), the rotation axis of the evaporation disk (62) is horizontal and passes through the center of the evaporation disk (62), and the rotating bracket (643) is provided with a salt receiving cylinder (644) on the lower side of the evaporation disk (62).

2. The irrigation and drainage system for restoring saline-alkali land ecology according to claim 1, characterized in that: A cooling platform (67) for cooling the brine collection pool (61) and the internal brine is provided at the lower end of the brine collection pool (61), and a heat conduction plate (68) connected to the condensation collection plate (64) is provided at the side end of the brine collection pool (61).

3. The irrigation and drainage system for restoring saline-alkali land ecology according to claim 1, characterized in that: An arc-shaped plate (641) extending in an arc shape downward is provided at the peripheral side end of the condensation collection plate (64), and the lower side end of the arc-shaped plate (641) is bent inward to form a water flow channel (642), and the two ends of the water flow channel (642) are respectively connected to the downstream plate (65).

4. The irrigation and drainage system for restoring saline-alkali land ecology according to claim 1, characterized in that: A float valve (611) is provided in the salt water collection pool (61), and a water supply hose (612) partially inserted into the salt water is provided on the float valve (611). The other end of the water supply hose (612) extends to the upper side of the evaporation disk (62) and is vertically fixed to the middle of the condensation collection plate (64). The end of the water supply hose (612) away from the float valve (611) drips salt water into the evaporation tank (621).

5. The irrigation and drainage system for restoring saline-alkali land ecology according to claim 1, characterized in that: The evaporation plate (62) is coated with a non-stick coating on the inner wall of the evaporation tank (621), and a vibrator (645) is arranged at the side end of the evaporation plate (62).

6. The irrigation and drainage system for restoring saline-alkali land ecology according to claim 1, characterized in that: The salt water collection pool (61) comprises a pool frame (613), a pool bottom (614) rotatably connected to the pool frame (613), and a pool body (615) arranged on the pool frame (613); the rotation axis of the pool bottom (614) is horizontal; the upper edge of the pool bottom (614) is in an arc shape with its own rotation axis as the axis center; the lower edge of the pool body (615) is aligned with the upper edge of the pool bottom (614); a sealing ring (6151) is arranged on the lower edge of the pool body (615); and the pool bottom (614) is connected to the pool body (615) in a rotating seal.

7. The irrigation and drainage system for restoring saline-alkali land ecology according to claim 1, characterized in that: The cross section of the water collecting and draining pipe (4) is in a horizontally arranged waist shape, the water collecting hole (41) is in a waist shape, and the water collecting hole (41) is in a flared shape from the inside to the outside of the water collecting and draining pipe (4).

8. An underground irrigation and drainage method for saline-alkali land ecological restoration using the irrigation and drainage system for saline-alkali land ecological restoration according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: step 1, water without salt flows in along the water inlet pipe (3), flows into all the irrigation water pipes (1) through the transfer water pipe (2), and drips out along the irrigation holes (11) at the peripheral ends of the irrigation water pipes (1); step 2, the dripping water dissolves in the soil and combines with the salt in the soil. When a large amount of water accumulates in the soil, it will infiltrate under the action of gravity, thereby carrying the salt in the soil away from the upper soil layer; step 3, the water containing salt infiltrates to the upper side of the water collection and drainage pipe (4), and flows into the water collection and drainage pipe (4) along the water collection holes (41). The water in the water collection and drainage pipe (4) is then discharged through the drainage pipe (5); step 4, the water discharged from the drainage pipe (5) will directly flow into the salt analyzer (6). The salt analyzer (6) analyzes the salt in the salt water, so that the water without salt flows out from the water inlet pipe (3), thereby forming a cycle to complete the ecological restoration of the saline-alkali land.

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