Underground salt water recycling system, control method thereof and storage medium

Abstract

The invention relates to the technical field of water treatment, and discloses an underground salt water recycling system, a control method thereof and a storage medium, the system comprises a photo-thermal water heater, a salt water pool, a distributed arc condensation top photo-thermal water purifier, a mixing pool, a salinity tester, an intelligent control irrigation pump and a drip irrigation tape, the photo-water heater and the salt water tank are respectively in through connection with the first salt water suction pump, the photo-water heater is in through connection with the distributed arc-shaped condensation top photo-thermal water purifier, the mixing tank is respectively in through connection with the salt water tank and the distributed arc-shaped condensation top photo-thermal water purifier, and the mineralization degree tester is in communication connection with the intelligent control irrigation pump. According to the cyclic utilization system, on the premise that wind-solar complementary power generation is used according to local conditions, underground salt water resources are reasonably utilized to be mixed with desalted fresh water for irrigation, salinization of soil is reduced, the underground water level is lowered, the cost requirement of farmland irrigation is met, the desalting effect is thorough, and the water recovery rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and in particular to an underground salt water recycling system, a control method for the underground salt water recycling system, and a non-transient computer-readable storage medium. Background Art

[0002] High groundwater mineralization and shallow burial depth are two important reasons for secondary soil salinization in arid and semi-arid areas. When the groundwater level rises, salt is brought to the soil surface, and due to the dry climate, the soil lacks fresh water, causing secondary soil salinization. The direct extraction of salt water for irrigation does not meet the mineralization required for crop growth, and these areas often lack fresh water for irrigation. However, the cost of transporting water from other places is high, and the local groundwater level cannot be effectively controlled, which is not conducive to sustainable development. Combining lowering the groundwater level through pumping and drainage with salt water desalination is an effective means to improve the efficiency of salt water utilization and improve soil salinization in arid areas.

[0003] At present, the commonly used methods of salt water desalination include direct distillation, electrodialysis, reverse osmosis, dew point evaporation, etc. Since factory desalination requires stable electricity, stable electricity cannot meet the needs of large-scale farmland distribution. The initial investment and operating costs of membrane desalination are very high, and the water quality requirements for influent are strict, which cannot meet the cost requirements of farmland irrigation. However, sparsely populated arid areas are not suitable for building additional power generation equipment. Although the direct heating distillation method is thorough in desalination, it has high energy consumption, low yield, and is difficult for farmers to afford. The use of electrodialysis and reverse osmosis methods is not only costly, but also has low water recovery rate, incomplete desalination effect, and is not conducive to agricultural irrigation. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first purpose of the present invention is to propose an underground salt water recycling system, which can reasonably utilize underground salt water resources and mix with desalinated fresh water for irrigation under the premise of using wind and solar complementary power generation according to local conditions, reduce soil salinization, lower the groundwater level, meet the cost requirements of farmland irrigation, achieve a thorough desalination effect, and have a high water recovery rate.

[0005] The second object of the present invention is to provide a control method for an underground salt water recycling system.

[0006] A third object of the present invention is to provide a non-transitory computer-readable storage medium.

[0007] To achieve the above-mentioned purpose, the first embodiment of the present invention proposes an underground salt water recycling system, including a light water heater, a salt water tank, a distributed arc condensing top photothermal water purifier, a mixing tank, a mineralization meter, an intelligent control irrigation pump and a drip irrigation belt; the light water heater and the salt water tank are respectively connected to the first salt water pumping pump, the first salt water pumping pump is used to extract the underground salt water in the target land area and supply the underground salt water to the light water heater and the salt water tank, the light water heater is used to preliminarily heat the underground salt water to a preset temperature, and the salt water tank is used to store the underground salt water; the light water heater is connected to the distributed arc condensing top photothermal water purifier, the distributed arc condensing top photothermal water purifier is used to further heat the underground salt water that has reached the preset temperature, distill the underground salt water, and obtain condensed fresh water; the mixing tank is respectively connected to the salt water tank and the distributed arc condensing top photothermal water purifier. The condensation top solar thermal water purifier is connected through, and the mixing tank is used to obtain underground salt water in the salt water tank and condensed fresh water in the distributed arc condensation top solar thermal water purifier, and mix the underground salt water and the condensed fresh water to obtain a mixed liquid; the mineralization meter is communicated with the intelligent control irrigation pump, and is used to measure the mineralization data of the mixed liquid in the mixing tank, and send the mineralization data to the intelligent control irrigation pump; the intelligent control irrigation pump is used to predict the future water evaporation of the target land area according to the mineralization and the historical water evaporation of the target land area, and predict the soil moisture of the target land area according to the future water evaporation, and judge whether the mineralization and soil moisture meet the preset requirements. In response to the mineralization and soil moisture meeting the preset requirements, the mixed liquid in the mixing tank is extracted and supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area.

[0008] In addition, the underground salt water recycling system according to the above embodiment of the present invention may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the distributed arc-shaped condensation top solar thermal water purifier includes a plurality of arc-shaped condensation top solar thermal water purifiers, each of which includes a salt water storage bottom bin and a hollow plexiglass dome arranged on the salt water storage bottom bin.

[0010] According to some embodiments of the present invention, the salt water storage bottom bin is connected through-connected with the light water heater, which supplies underground salt water reaching a preset temperature to the salt water storage bottom bin, so that the underground salt water reaching the preset temperature is further heated in the salt water storage bottom bin to form water vapor; a hollow flow channel is provided between the inner wall and the outer wall of the hollow plexiglass dome, and condensed water for cooling circulates inside the hollow flow channel; the salt water storage bottom bin and the hollow plexiglass dome constitute a condensation space, and a volcano-type steam chimney is provided in the condensation space, and the volcano-type steam chimney is provided with an air outlet, and the air outlet is used to allow the water vapor in the salt water storage bottom bin to overflow, so that the water vapor overflows and is pre-cooled and condensed into condensed fresh water in the hollow plexiglass dome.

[0011] According to some embodiments of the present invention, a volcano-type steam chimney hood is arranged above a salt water storage bottom bin, an air outlet at the top of the volcano-type steam chimney hood is raised and close to the inner wall of the hollow plexiglass dome, and the port edge at the bottom of the volcano-type steam chimney is sealed and connected to the salt water storage bottom bin.

[0012] According to some embodiments of the present invention, a volcano-type chimney hood is tilted at a preset angle in the condensation space to form a high collection area and a low collection area in the condensation space, and a condensation fresh water channel is provided between the low collection area and the mixing pool; the condensed fresh water condensed on the inner wall of the hollow plexiglass dome falls into the low collection area and can be supplied to the mixing pool through the condensation fresh water channel; the condensed fresh water condensed on the inner wall of the hollow plexiglass dome falls into the high collection area and can flow to the low collection area under the action of the preset tilt angle and be supplied to the mixing pool through the condensation fresh water channel.

[0013] According to some embodiments of the present invention, a condensation medium inlet is provided at one end of the hollow flow channel, and a condensation medium outlet is provided at the other end of the hollow flow channel. The condensation medium inlet is used to provide condensation medium to the hollow flow channel to condense water vapor to form condensed fresh water, and the condensation medium outlet is used to export the circulated condensation medium.

[0014] According to an embodiment of the present invention, an underground salt water recycling system includes an optical water heater, a salt water pool, a distributed arc condensing top photothermal water purifier, a mixing pool, a mineralization meter, an intelligent control irrigation pump and a drip irrigation belt; the optical water heater and the salt water pool are respectively connected to a first salt water pumping pump, the first salt water pumping pump is used to extract underground salt water in a target land area and supply the underground salt water to the optical water heater and the salt water pool, the optical water heater is used to preliminarily heat the underground salt water to a preset temperature, and the salt water pool is used to store the underground salt water; the optical water heater is connected to the distributed arc condensing top photothermal water purifier, the distributed arc condensing top photothermal water purifier is used to further heat the underground salt water that has reached a preset temperature, and distill the underground salt water to obtain condensed fresh water; the mixing pool is respectively connected to the salt water pool and the distributed arc condensing top photothermal water purifier The mixing pool is connected through, and is used to obtain underground salt water in the salt water pool and condensed fresh water in the distributed arc condensing top solar thermal water purifier, and mix the underground salt water and condensed fresh water to obtain a mixed liquid; the mineralization meter is connected to the intelligent control irrigation pump for measuring the mineralization data of the mixed liquid in the mixing pool, and sending the mineralization data to the intelligent control irrigation pump; the intelligent control irrigation pump is used to predict the future water evaporation of the target land area according to the mineralization and the historical water evaporation of the target land area, and predict the soil moisture of the target land area according to the future water evaporation, judge whether the mineralization and soil moisture meet the preset requirements, and in response to the mineralization and soil moisture meeting the preset requirements, extract the mixed liquid in the mixing pool and supply it to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area. Therefore, the system can reasonably utilize underground salt water resources and desalinated fresh water for irrigation under the premise of using wind and solar complementary power generation according to local conditions, reduce soil salinization, reduce groundwater levels, meet the cost requirements of farmland irrigation, and have a thorough desalination effect and a high water recovery rate.

[0015] The second purpose of the present invention is to propose a control method for an underground salt water recycling system, which can reasonably utilize underground salt water resources and mix them with desalinated fresh water for irrigation under the premise of using wind and solar complementary power generation according to local conditions, thereby reducing soil salinization, lowering groundwater levels, and meeting the cost requirements of farmland irrigation. The desalination effect is thorough and the water recovery rate is high.

[0016] To achieve the above-mentioned purpose, a second embodiment of the present invention proposes a control method for an underground saltwater recycling system, comprising: obtaining the historical water evaporation of a target land area, and predicting the future water evaporation of the target land area through a pre-constructed soil moisture prediction model based on the historical water evaporation; judging whether the future water evaporation reaches a preset evaporation threshold; in response to the future water evaporation reaching the preset evaporation threshold, controlling the mixed liquid in the extraction mixing pool to be supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area.

[0017] In addition, the control method of the underground salt water recycling system according to the above embodiment of the present invention may also have the following additional technical features:

[0018] According to some embodiments of the present invention, before determining whether the future water evaporation amount reaches a preset evaporation amount threshold, the method further includes: obtaining mineralization data of the mixed liquid in the mixing pool; determining whether the mineralization data reaches a preset mineralization threshold; in response to the mineralization data reaching the preset mineralization threshold, determining whether the future water evaporation amount reaches the preset evaporation threshold.

[0019] According to some embodiments of the present invention, in response to the future water evaporation reaching a preset evaporation threshold, the method further includes: determining the future irrigation amount based on the future water evaporation and mineralization data, and controlling the extraction of the mixed liquid in the mixing pool to supply it to the drip irrigation belt according to the future irrigation amount, so that the drip irrigation belt irrigates the mixed liquid to the target land area.

[0020] According to the control method of the underground salt water recycling system of the embodiment of the present invention, the historical water evaporation of the target land area is obtained, and the future water evaporation of the target land area is predicted by a pre-constructed soil moisture prediction model based on the historical water evaporation; it is judged whether the future water evaporation reaches the preset evaporation threshold; in response to the future water evaporation reaching the preset evaporation threshold, the mixed liquid in the extraction mixing pool is controlled to be supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area. Therefore, the method can reasonably utilize underground salt water resources and desalinated fresh water for irrigation under the premise of using wind and solar complementary power generation according to local conditions, reduce soil salinization, lower the groundwater level, meet the cost requirements of farmland irrigation, and achieve a thorough desalination effect and a high water recovery rate.

[0021] To achieve the above-mentioned purpose, a third aspect of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the above-mentioned control method of the underground salt water recycling system when executed by a processor.

[0022] According to the non-transitory computer-readable storage medium of an embodiment of the present invention, by executing the above-mentioned control method of the underground salt water recycling system, it is possible to reasonably utilize underground salt water resources and mix them with desalinated fresh water for irrigation under the premise of using wind-solar complementary power generation in accordance with local conditions, thereby reducing soil salinization, lowering the groundwater level, and meeting the cost requirements of farmland irrigation. The desalination effect is thorough and the water recovery rate is high.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A schematic diagram of an underground salt water recycling system according to some embodiments of the present invention;

[0025] Figure 2 Schematic diagram of an arc-shaped condensing top solar thermal water purifier according to some embodiments of the present invention;

[0026] Figure 3 The present invention is a flowchart of a control method of an underground salt water recycling system according to some embodiments of the present invention.

[0027] Description of Reference Numerals

[0028] Photothermal water heater 1, first salt water pump 2, salt water pool 3, distributed arc condensing top photothermal water purifier 4, salt water storage bottom bin 41, salt water storage bottom bin inlet 411, hollow plexiglass dome 42, volcano-type steam chimney cover 43, condensing medium inlet 44, condensing medium outlet 45, condensing fresh water channel 46, mixing pool 5, mineralization meter 6, intelligent control irrigation pump 7 and drip irrigation belt 8. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] As mentioned in the background technology section, high groundwater mineralization and shallow burial depth are two important reasons for secondary soil salinization in arid and semi-arid areas. When the groundwater level rises, salt is brought to the soil surface, and due to the dry climate, the soil lacks fresh water, causing secondary soil salinization. The method of directly extracting salt water for irrigation does not meet the mineralization required for crop growth, and these areas often lack the fresh water needed for irrigation. However, the cost of transporting water from other places is high, and the local underground salt water level cannot be effectively controlled, which is not conducive to sustainable development. Combining lowering the groundwater level by pumping and draining water with salt water desalination is an effective means to improve the efficiency of salt water utilization in arid areas and improve soil salinization.

[0032] In the process of realizing the present invention, the applicant found that the commonly used means of desalination of salt water include direct distillation, electrodialysis, reverse osmosis dew point evaporation, etc. Since factory desalination requires stable electricity, stable electricity cannot meet the needs of large-scale farmland distribution. The initial investment and operating costs of membrane desalination are very high, and the water quality requirements for influent are strict, which cannot meet the cost requirements of farmland irrigation. However, sparsely populated arid areas are not suitable for building additional power generation equipment. Although the direct heating distillation method is thoroughly desalinated, it has high energy consumption, low yield, and is difficult for farmers to afford. The methods of electrodialysis and reverse osmosis are not only costly, but also have low water recovery rates, incomplete desalination effects, and are not conducive to agricultural irrigation.

[0033] The underground salt water recycling system, the control method of the underground salt water recycling system and the storage medium proposed in the embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] refer to Figure 1 , is a schematic diagram of an underground salt water recycling system according to some embodiments of the present invention.

[0035] The underground salt water recycling system of the present invention includes a solar water heater 1, a salt water tank 3, a distributed arc condensing top solar thermal water purifier 4, a mixing tank 5, a mineralization meter 6, a pumping and drainage pipe (not shown in the figure), an intelligent control irrigation pump 7 and a drip irrigation belt 8.

[0036] Since there is underground salt water under the target land area (irrigated farmland), the underground salt water is difficult to use directly and causes soil salt return. Therefore, it is necessary to extract part of the underground salt water to reduce the salinity of the target land area. At this time, the first salt water pump 2 first extracts underground salt water from the underground of the target land area to make the underground salt water buried below 2m, thereby controlling the groundwater level. The first salt water pump 2 is connected to the salt water pool 3 through the first salt water pump 2, and is used to extract underground salt water in the target land area and supply the underground salt water to the salt water pool 3 so that there is underground salt water in the salt water pool 3. The first salt water pump 2 is connected to the light water heater 1 through the first salt water pump 2, and is used to extract underground salt water in the target land area and supply the underground salt water to the light water heater 1 so that there is underground salt water in the light water heater 1, and the underground salt water in the light water heater 1 is preliminarily heated to a preset temperature.

[0037] The light water heater 1 is connected to the distributed arc condensing top light thermal water purifier 4, wherein the light water heater 1 is connected to the distributed arc condensing top light thermal water purifier 4 through a water pipe, and the distributed arc condensing top light thermal water purifier 4 is a plurality of parallel arc condensing top light thermal water purifiers, and the distributed arc condensing top light thermal water purifier 4 is used to further heat the underground salt water that has reached a preset temperature, and after the underground salt water is further heated, the underground salt water is distilled to obtain condensed fresh water. Thus, the temperature of the underground salt water is continuously increased by heating with the light water heater 1 and the distributed arc condensing top light thermal water purifier 4.

[0038] refer to Figure 2 , is a schematic diagram of an arc-shaped condensing top solar thermal water purifier according to some embodiments of the present invention. The distributed arc-shaped condensing top solar thermal water purifier 4 includes multiple arc-shaped condensing top solar thermal water purifiers, each of which includes a salt water storage bottom bin 41, a hollow plexiglass dome 42 arranged on the salt water storage bottom bin 41, a volcano-shaped chimney cover 43, a condensing medium inlet 44 and a condensing medium outlet 45, wherein the salt water storage bottom bin 41 is cylindrical and the hollow plexiglass dome 42 is transparent.

[0039] Preferably, since the hollow plexiglass dome 42 is transparent, the underground salt water can be heated by sunlight shining on the salt water storage bottom bin 41 to promote the evaporation of the underground salt water. The salt water storage bottom bin 41 is connected to the light water heater 1. The light water heater 1 supplies the underground salt water reaching the preset temperature to the salt water storage bottom bin 41 through the salt water storage bottom bin inlet 411, so that the underground salt water reaching the preset temperature is further heated in the salt water storage bottom bin 41 to form water vapor.

[0040] As a specific embodiment, the salt water storage bottom bin 41 may have a heating structure inside, wherein the heating structure may be a heater. The heating power of the heater and the flow rate of the cooling medium will have a certain impact on the condensation efficiency. The greater the heating power of the heater and the faster the flow rate of the cooling medium, the better the condensation efficiency.

[0041] The volcano-shaped chimney cover 43 is arranged above the salt water storage bottom bin 41. The air outlet at the top of the volcano-shaped chimney cover 43 is raised and close to the inner wall of the hollow organic glass dome 42 to accelerate the rise of water vapor and collect fresh water, and quickly mix the condensed water with water vapor. The port edge at the bottom of the volcano-shaped chimney is sealed and connected to the salt water storage bottom bin 41 to prevent the condensed fresh water from flowing into the salt water storage bottom bin 41. Since the chimney cover 43 is a volcano-shaped structure, the two sides of the volcano-shaped chimney cover 43 have a certain slope, so that the condensed fresh water can flow out from the condensed fresh water channel 46 in the form of acceleration, which can improve the efficiency of the condensed fresh water outflow.

[0042] The volcano-type chimney hood 43 is tilted at a preset angle in the condensation space to form a high collection area and a low collection area in the condensation space. The high collection area and the low collection area are used to collect condensed fresh water. A condensed fresh water channel 46 is arranged between the low collection area and the mixing pool 5, wherein the low collection area is close to the mixing pool 5, and the high collection area is close to the light water heater 1.

[0043] In some embodiments, the larger the preset angle is, the faster the condensed fresh water flows toward the mixing tank 5 ; the smaller the preset angle is, the slower the condensed fresh water flows toward the mixing tank 5 .

[0044] After the condensed fresh water condensed on the inner wall of the hollow plexiglass dome 42 falls into the low collection area, the condensed fresh water can be supplied to the mixing pool 5 through the condensed fresh water channel 46. After the condensed fresh water condensed on the inner wall of the hollow plexiglass dome 42 falls into the high collection area, it can flow to the low collection area under the action of a preset inclination angle, and the condensed fresh water can be supplied to the mixing pool 5 through the condensed fresh water channel 46.

[0045] A hollow flow channel is provided between the inner wall and the outer wall of the hollow organic glass dome 42, and condensed water for cooling circulates inside the hollow flow channel.

[0046] The top circumferential area of ​​the salt water storage bottom bin 41 is connected to the bottom circular axis area of ​​the hollow plexiglass dome 42 to form a condensation space, wherein the radius of the salt water storage bottom bin 41 is the same as the radius of the hollow plexiglass dome 42, and a volcano-type steam chimney is arranged in the condensation space, and the volcano-type steam chimney is provided with an air outlet, and the air outlet is used to allow the water vapor in the salt water storage bottom bin 41 to overflow, so that the water vapor can be pre-cooled and condensed into condensed fresh water in the hollow plexiglass dome 42 after overflowing.

[0047] A condensation medium inlet 44 is provided at one end of the hollow flow channel, and a condensation medium outlet 45 is provided at the other end of the hollow flow channel. The condensation medium inlet 44 is used to provide condensation medium to the hollow flow channel to condense water vapor to form condensed fresh water, and the condensation medium outlet 45 is used to export the circulated condensation medium.

[0048] The mixing tank 5 is connected to the salt water tank 3 and the distributed arc condensation top solar thermal water purifier 4 respectively, wherein the mixing tank 5 is connected to the salt water tank 3 and the distributed arc condensation top solar thermal water purifier 4 respectively through water pipes. The mixing tank 5 is used to obtain underground salt water in the salt water tank 3 and condensed fresh water in the distributed arc condensation top solar thermal water purifier 4, and mix the underground salt water and the condensed fresh water to obtain a mixed liquid, and store the mixed liquid in the mixing tank 5 for irrigating farmland.

[0049] The mineralization meter 6 is in communication connection with the intelligent control irrigation pump 7 , and is used to measure the mineralization data of the mixed liquid in the mixing tank 5 , and send the mineralization data to the intelligent control irrigation pump 7 .

[0050] The intelligent controlled irrigation pump 7 is used to receive the mineralization data sent by the mineralization measuring instrument 6. The historical water evaporation of the target land area can be obtained by data collection, data source, considering regional characteristics, spatiotemporal resolution or data reference. Then, the future water evaporation of the target land area is predicted based on the mineralization received by the intelligent controlled irrigation pump 7 and the historical water evaporation of the target land area, and the soil moisture of the target land area is predicted based on the future water evaporation. Then, it is judged whether the mineralization and soil moisture meet the preset requirements, wherein the preset requirements can be set according to the mineralization and soil moisture required by the target land area. When the mineralization and soil moisture meet the preset requirements, the mixed liquid in the mixing tank 5 is extracted and supplied to the drip irrigation belt 8, so that the drip irrigation belt 8 irrigates the mixed liquid to the target land area and reduces the salinization degree of the soil in the target land area.

[0051] In summary, the underground salt water recycling system according to the embodiment of the present invention includes a solar water heater, a salt water tank, a distributed arc-shaped condensing top solar thermal water purifier, a mixing tank, a mineralization meter, an intelligent control irrigation pump and a drip irrigation belt; the solar water heater and the salt water tank are respectively connected to the first salt water pumping pump, the first salt water pumping pump is used to extract the underground salt water in the target land area and supply the underground salt water to the solar water heater and the salt water tank, the solar water heater is used to preliminarily heat the underground salt water to a preset temperature, and the salt water tank is used to store the underground salt water; the solar water heater is connected to the distributed arc-shaped condensing top solar thermal water purifier, the distributed arc-shaped condensing top solar thermal water purifier is used to further heat the underground salt water that has reached the preset temperature, and distill the underground salt water to obtain condensed fresh water; the mixing tank is respectively connected to the salt water tank and the distributed arc-shaped condensing top solar thermal purifier The water device is connected through, and the mixing pool is used to obtain the underground salt water in the salt water pool and the condensed fresh water in the distributed arc condensing top solar thermal water purifier, and mix the underground salt water and the condensed fresh water to obtain a mixed liquid; the mineralization meter is connected to the intelligent control irrigation pump for communication, and is used to measure the mineralization data of the mixed liquid in the mixing pool, and send the mineralization data to the intelligent control irrigation pump; the intelligent control irrigation pump is used to predict the future water evaporation of the target land area according to the mineralization and the historical water evaporation of the target land area, and predict the soil moisture of the target land area according to the future water evaporation, and judge whether the mineralization and soil moisture meet the preset requirements. In response to the mineralization and soil moisture meeting the preset requirements, the mixed liquid in the mixing pool is extracted and supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area. Therefore, the system can reasonably utilize underground salt water resources and desalinated fresh water for irrigation under the premise of using wind and solar complementary power generation according to local conditions, reduce soil salinization, reduce groundwater levels, meet the cost requirements of farmland irrigation, and have a thorough desalination effect and a high water recovery rate.

[0052] refer to Figure 3 , is a flow chart of a control method for an underground salt water recycling system according to some embodiments of the present invention.

[0053] like Figure 3 As shown, the control method of the underground salt water recycling system according to the embodiment of the present invention may include the following steps:

[0054] S301, obtaining the historical water evaporation of the target land area, and predicting the future water evaporation of the target land area through a pre-built soil moisture prediction model based on the historical water evaporation.

[0055] Specifically, historical meteorological data of relevant land areas can be collected. These data may include precipitation, temperature, humidity, wind speed, etc., because these factors will affect the evaporation of water. The data source can be observation data from meteorological stations, remote sensing satellite data, or meteorological reanalysis data to obtain the historical water evaporation of the target land area. Alternatively, the historical water evaporation of the target land area can be obtained through the climate conditions, topography, land use types, etc. of different regions.

[0056] The pre-built soil moisture prediction model can be a LATM (Low-overhead MPEG-4Audio TransportMultiplex) model. The steps of building the soil moisture prediction model can be as follows: first, clarify the monitoring objectives and requirements of the model, for example, monitoring the dynamic changes of soil moisture and predicting future soil moisture. Second, collect relevant soil moisture data, which may include historical data, real-time monitoring data, meteorological data, etc. These data can come from automatic monitoring stations, remote sensing satellites, meteorological stations, etc., and divide these data into training data sets and verification data sets according to a certain ratio (such as 7:3). Third, clean, correct and interpolate the collected data to ensure the accuracy and completeness of the data. It may be necessary to process missing values, outliers, noise, etc. Fourth, select features useful for model prediction from the pre-processed data, such as soil temperature, humidity, meteorological conditions, etc. Fifth, design the structure of the LATM model, including determining the number of nodes in the input layer, hidden layer and output layer of the model, and selecting appropriate activation functions and optimization algorithms. Step 6: Use the training data set to train the model and adjust the model parameters to minimize the prediction error. Step 7: Use the validation data set to validate the model and evaluate the generalization ability of the model. Step 8: Adjust and optimize the model based on the validation results, which may include adjusting the model structure, increasing or decreasing the number of layers, adjusting the learning rate, etc. Step 9: Deploy the trained model to actual applications for real-time monitoring and prediction. Step 10: Continuously monitor and maintain the model and update and optimize the model based on new data and feedback.

[0057] After obtaining the historical water evaporation of the target land area and the pre-constructed soil moisture prediction model, the future water evaporation of the target land area is predicted through the pre-constructed soil moisture prediction model based on the historical water evaporation, so as to make up for the missing water for irrigation of the target land area due to the evaporation of the future water evaporation in the subsequent irrigation process.

[0058] S302, judging whether the future water evaporation reaches a preset evaporation threshold value, wherein the preset evaporation threshold value can be calibrated according to actual conditions.

[0059] Specifically, after the future water evaporation amount is obtained, it is judged whether the future water evaporation amount reaches a preset evaporation amount threshold, wherein the preset evaporation amount threshold can be set according to the historical water evaporation amount.

[0060] S303, in response to the future evaporation of water reaching a preset evaporation threshold, controlling the mixed liquid in the mixing pool to be supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area.

[0061] Specifically, when the evaporation of water reaches the preset evaporation threshold in the future, it means that drip irrigation is needed for the target land area to reduce the salinity of the target land area. At this time, the intelligent control irrigation pump controls the extraction of the mixed liquid in the mixing pool to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area. In this way, under the premise of using wind and solar complementary power generation according to local conditions, it is possible to reasonably use underground salt water resources and desalinated fresh water for irrigation, reduce soil salinization, lower groundwater levels, meet the cost requirements of farmland irrigation, achieve thorough desalination, and have a high water recovery rate.

[0062] In some embodiments, after predicting the future evaporation of water in the target land area, the soil moisture can be predicted by the future evaporation. When the predicted value of the soil moisture does not meet the preset value, the farmland underground salt water continues to be desalinated. When the predicted value of the soil moisture meets the preset value, the farmland underground salt water is stopped from being desalinated, and the excess power generation is controlled to be output externally. For example, the excess power generation can be stored through the energy storage system or the excess power generation can be output to the power grid according to the scheduling instruction. The intelligent control irrigation pump extracts the mixed liquid in the mixing tank and supplies it to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area and reduces the degree of soil salinization in the target land area.

[0063] As a specific embodiment, a salt water with a concentration of 2g / L is injected under the farmland model to simulate farmland salt water, wherein the farmland model can be the target land area to be simulated. Turn on the water pump to pump 2g / L of salt water into the salt water pool and the light water heater respectively, and control the underground salt water depth of the farmland model to be less than 2m, and always control it within the range of 1m to 2m, so as to control the groundwater level. When the underground water depth of the farmland model is pumped to more than 2m, the underground salt water (2g / L salt water) is not pumped into the salt water pool and the light water heater respectively.

[0064] First, the solar water heater is used to irradiate the underground salt water with sunlight to heat the underground salt water, and the solar water heater is used to heat the underground salt water to 75°C. The heated underground salt water is then pumped from the water inlet of the distributed arc condensing top solar thermal water purifier into the salt water storage bottom bin of the distributed arc condensing top solar thermal water purifier, thereby further heating the underground salt water under the sunlight.

[0065] Turn on the condensate circulation pump to allow the condensate to enter from the condensation medium inlet and circulate continuously in the hollow plexiglass dome. The water vapor in the salt water storage bottom bin passes through the volcano-type chimney hood. After contacting the hollow plexiglass dome, the water vapor combines with the condensate to become fresh water and gradually flows out from the outlet along the edge of the volcano-type chimney hood. When the required temperature is fully reached, the desalination rate is about 0.24g / s.

[0066] Fresh water from the distributed arc condensing top solar thermal water purifier enters the mixing tank and is mixed with salt water pumped into the salt water tank after a period of accumulation. When the mineralization of the mixed water reaches 1.5g / L, the mixing tank automatically stops mixing. As the underground salt water desalination proceeds, the above mixing process is repeated continuously, and the mixed brackish water is stored in the mixing tank.

[0067] Since the farmland model uses dry sand, the water content of the farmland model is zero, so the intelligent control irrigation water pump will automatically start, and then control the brackish water for irrigation, while controlling the desalination process. When the mineralization data of the mixed liquid in the mixing pool is greater than the preset value, the mixing pool stops desalination and outputs the excess power generation to the outside, where the power is determined by the wind pump based on the mineralization monitoring instrument and the multi-day evaporation to determine whether to irrigate. Then, the LATM model is used to predict the future daily evaporation, and then predict the soil moisture. When the predicted value of the soil moisture does not meet the preset value, the farmland underground salt water continues to be desalinated. When the predicted value of the soil moisture meets the preset value, the farmland underground salt water stops desalination, and the excess power generation is controlled to be output. The intelligent control irrigation pump extracts the mixed liquid in the mixing pool and supplies it to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area and reduces the degree of soil salinization in the target land area.

[0068] In some embodiments of the present invention, before determining whether the future water evaporation reaches a preset evaporation threshold, the method further includes: obtaining mineralization data of the mixed liquid in the mixing pool; determining whether the mineralization data reaches a preset mineralization threshold; in response to the mineralization data reaching the preset mineralization threshold, determining whether the future water evaporation reaches the preset evaporation threshold.

[0069] Specifically, the mineralization data of the mixed liquid in the mixing pool can be measured by a mineralization meter. After the mineralization data of the mixed liquid in the mixing pool is obtained, since high mineralization data will have a certain impact on the target land area, it is necessary to determine whether the mineralization data of the mixed liquid reaches a preset mineralization threshold, wherein the preset mineralization threshold can be set according to suitable growth conditions for farmland crops. When the mineralization data of the mixed liquid reaches the preset mineralization threshold, it means that the mineralization data of the mixed liquid meets the requirements. At this time, the mixing pool stops mixing, and then determines whether the future water evaporation reaches the preset evaporation threshold.

[0070] When the mineralization data of the mixed liquid does not reach the preset mineralization threshold, it means that the mineralization data of the mixed liquid does not meet the requirements. At this time, it is necessary to continue to desalinate to reduce the mineralization data, and then extract the underground salt water in the target land area through the first salt water pump, and supply the underground salt water to the light water heater, so that there is underground salt water in the light water heater, and the underground salt water in the light water heater is preliminarily heated to the preset temperature. Then, the distributed arc condensing top photothermal water purifier further heats the underground salt water that has reached the preset temperature, and after the underground salt water is further heated, the underground salt water is distilled to obtain condensed fresh water. The mixing pool obtains the underground salt water in the salt water pool and the condensed fresh water in the distributed arc condensing top photothermal water purifier, and mixes the underground salt water and the condensed fresh water to obtain a mixed liquid. The mineralization meter measures the mineralization data of the mixed liquid in the mixing pool, and continues to judge whether the mineralization data of the mixed liquid reaches the preset mineralization threshold until the mineralization data of the mixed liquid reaches the preset mineralization threshold, and stops this step.

[0071] In some embodiments of the present invention, in response to the future water evaporation reaching a preset evaporation threshold, the method further includes: determining the future irrigation amount based on the future water evaporation and mineralization data, and controlling the extraction of the mixed liquid in the mixing pool to supply it to the drip irrigation belt according to the future irrigation amount, so that the drip irrigation belt irrigates the mixed liquid to the target land area.

[0072] Specifically, after the future evaporation reaches the preset evaporation threshold, the future irrigation amount is determined according to the future evaporation and mineralization data (i.e., the future irrigation amount is determined by the future evaporation). After the future irrigation amount is determined, the drip irrigation belt is selected. The drip irrigation belt with appropriate material and aperture can be selected according to the arrangement of crops and water demand. For example, common drip irrigation belt materials include polyethylene and polyvinyl chloride, and the aperture determines the drip rate. According to the future irrigation amount, the mixed liquid in the mixing pool is controlled and supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area, so that the salinity of the target land area is within a certain range.

[0073] In summary, according to the control method of the underground salt water recycling system of the embodiment of the present invention, the historical water evaporation of the target land area is obtained, and the future water evaporation of the target land area is predicted by a pre-constructed soil moisture prediction model based on the historical water evaporation; whether the future water evaporation reaches the preset evaporation threshold is judged; in response to the future water evaporation reaching the preset evaporation threshold, the mixed liquid in the extraction mixing pool is controlled to be supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the mixed liquid to the target land area. Therefore, under the premise of using wind-solar complementary power generation according to local conditions, the method can reasonably utilize underground salt water resources and desalinated fresh water for irrigation, reduce soil salinization, lower groundwater levels, meet the cost requirements of farmland irrigation, and achieve a thorough desalination effect and a high water recovery rate.

[0074] It should be noted that the method of the embodiment of the present invention can be performed by a single device, such as a computer or a server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present invention, and the multiple devices will interact with each other to complete the above method.

[0075] It should be noted that some embodiments of the present invention are described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0076] Based on the same inventive concept, corresponding to the method of any of the above embodiments, the present invention also provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the method of any of the above embodiments.

[0077] The above-mentioned non-transitory computer-readable storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0078] The computer instructions stored in the storage medium of the above embodiment are used to enable a computer to execute the method of any embodiment in the above exemplary method part, and have the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0079] In addition, although the operations of the method of the present invention are described in a specific order in the accompanying drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. On the contrary, the steps depicted in the flow chart can be performed in a different order. Additionally or alternatively, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be decomposed into multiple steps.

[0080] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0081] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0082] Although the spirit and principle of the present invention have been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined to benefit, and this division is only for the convenience of expression. The present invention is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims. The scope of the attached claims conforms to the broadest interpretation, thereby including all such modifications and equivalent structures and functions.

Claims

1. An underground salt water recycling system, characterized in that: It includes a photothermal water heater (1), a salt water pool (3), a distributed arc-shaped condensing top photothermal water purifier (4), a mixing pool (5), a mineralization meter (6), an intelligent control irrigation pump (7) and a drip irrigation belt (8); The light water heater (1) and the salt water pool (3) are respectively connected to a first salt water pump (2), the first salt water pump (2) is used to extract underground salt water in the target land area and supply the underground salt water to the light water heater (1) and the salt water pool (3), the light water heater (1) is used to preliminarily heat the underground salt water to a preset temperature, and the salt water pool (3) is used to store the underground salt water; The photothermal water heater (1) is connected to the distributed arc-shaped condensing top photothermal water purifier (4), and the distributed arc-shaped condensing top photothermal water purifier (4) is used to further heat the underground salt water that has reached a preset temperature, and to perform a distillation operation on the underground salt water to obtain condensed fresh water; The mixing pool (5) is respectively connected to the salt water pool (3) and the distributed arc-shaped condensing top photothermal water purifier (4), and the mixing pool (5) is used to obtain underground salt water in the salt water pool (3) and condensed fresh water in the distributed arc-shaped condensing top photothermal water purifier (4), and mix the underground salt water and the condensed fresh water to obtain a mixed liquid; The mineralization measuring instrument (6) is in communication connection with the intelligent control irrigation pump (7) and is used to measure mineralization data of the mixed liquid in the mixing tank (5) and send the mineralization data to the intelligent control irrigation pump (7); The intelligent controlled irrigation pump (7) is used to predict the future water evaporation of the target land area based on the mineralization degree and the historical water evaporation of the target land area, and predict the soil moisture of the target land area based on the future water evaporation, and judge whether the mineralization degree and the soil moisture meet the preset requirements. In response to the mineralization degree and the soil moisture meeting the preset requirements, the mixed liquid in the mixing tank (5) is extracted and supplied to the drip irrigation belt (8), so that the drip irrigation belt (8) irrigates the target land area with the mixed liquid.

2. The underground salt water recycling system according to claim 1, characterized in that: The distributed arc-shaped condensation top solar thermal water purifier (4) comprises a plurality of arc-shaped condensation top solar thermal water purifiers, each of which comprises a salt water storage bottom bin (41) and a hollow plexiglass dome (42) arranged on the salt water storage bottom bin (41).

3. The underground salt water recycling system according to claim 2, characterized in that: The salt water storage bottom bin (41) is connected to the light water heater (1), and the light water heater (1) supplies underground salt water that has reached a preset temperature to the salt water storage bottom bin (41), so that the underground salt water that has reached the preset temperature is further heated in the salt water storage bottom bin (41) to form water vapor; A hollow flow channel is provided between the inner wall and the outer wall of the hollow organic glass dome (42), and condensed water for cooling circulates inside the hollow flow channel; The salt water storage bottom bin (41) and the hollow organic glass dome (42) constitute a condensation space, wherein a volcano-shaped steam chimney is provided in the condensation space, and the volcano-shaped steam chimney is provided with an air outlet, wherein the air outlet is used to allow the water vapor in the salt water storage bottom bin (41) to overflow, so that the water vapor is pre-condensed in the hollow organic glass dome (42) to become the condensed fresh water after overflowing.

4. The underground salt water recycling system according to claim 3, characterized in that: The volcano-type steam chimney cover (43) is arranged on the salt water storage bottom bin (41), the air outlet at the top of the volcano-type steam chimney cover (43) is raised and close to the inner wall of the hollow organic glass dome (42), and the port edge at the bottom end of the volcano-type steam chimney is sealed and connected to the salt water storage bottom bin (41).

5. The underground salt water recycling system according to claim 4, characterized in that: The volcano-shaped chimney hood (43) is tilted at a preset angle in the condensation space, forming a high collection area and a low collection area in the condensation space, and a condensation fresh water channel (46) is provided between the low collection area and the mixing pool (5); the condensation fresh water condensed on the inner wall of the hollow plexiglass dome (42) can be supplied to the mixing pool (5) through the condensation fresh water channel (46) after falling into the low collection area, and the condensation fresh water condensed on the inner wall of the hollow plexiglass dome (42) can flow to the low collection area under the action of the preset tilt angle after falling into the high collection area, and be supplied to the mixing pool (5) through the condensation fresh water channel (46).

6. The underground salt water recycling system according to claim 5, characterized in that: A condensation medium inlet (44) is provided at one end of the hollow flow channel, and a condensation medium outlet (45) is provided at the other end of the hollow flow channel. The condensation medium inlet (44) is used to provide condensation medium to the hollow flow channel to condense the water vapor to form condensed fresh water, and the condensation medium outlet (45) is used to discharge the condensation medium after circulation.

7. A control method for an underground salt water recycling system, characterized in that: Used to control the underground salt water recycling system as described in any one of claims 1 to 6, comprising: Obtaining historical water evaporation of a target land area, and predicting future water evaporation of the target land area using a pre-built soil moisture prediction model based on the historical water evaporation; Determining whether the future water evaporation amount reaches a preset evaporation amount threshold; In response to the future water evaporation reaching the preset evaporation threshold, the mixed liquid in the mixing pool is controlled to be supplied to the drip irrigation belt, so that the drip irrigation belt irrigates the target land area with the mixed liquid.

8. The control method of the salt water recycling system according to claim 7, characterized in that: Before determining whether the future water evaporation amount reaches a preset evaporation amount threshold, the method further includes: Obtaining mineralization data of the mixed liquid in the mixing pool; Determining whether the mineralization data reaches a preset mineralization threshold; In response to the mineralization data reaching a preset mineralization threshold, it is determined whether the future water evaporation amount reaches a preset evaporation amount threshold.

9. The control method of the underground salt water recycling system according to claim 7, characterized in that: After the response to the future water evaporation reaching the preset evaporation threshold, the method further includes: The future irrigation amount is determined according to the future water evaporation amount and the mineralization data, and the mixed liquid in the mixing pool is controlled to be supplied to the drip irrigation belt according to the future irrigation amount, so that the drip irrigation belt irrigates the mixed liquid to the target land area.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the underground salt water recycling system according to any one of claims 7 to 9 is implemented.

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