Method and system for saline-alkali soil treatment based on water cycle and terminal

Abstract

The application provides a saline-alkali soil treatment method and system based on water circulation, and relates to the technical field of saline-alkali soil treatment. The method comprises the following steps: controlling a preset irrigation device to irrigate preset treated tail water into a preset saline-alkali soil, and obtaining tail water irrigation time; determining whether the tail water irrigation time meets the requirements of a preset infiltration irrigation time; if not, the tail water irrigation time is continuously obtained for cyclic determination; if yes, a preset pressure device is controlled to increase the pressure of a preset underground pipe to promote the dissolution of salt in the saline-alkali soil into the treated tail water; a dissolution completion trigger signal is obtained; and the pressure device is controlled to reduce the pressure of the underground pipe according to the dissolution completion trigger signal to promote the infiltration of the treated tail water into the underground pipe and discharge. The application has the effect of ensuring good saline-alkali soil improvement effect.

Description

Technical Field

[0001] This application relates to the technical field of saline-alkali land management, and in particular to methods, systems and terminals for saline-alkali land management based on water cycle. Background Technology

[0002] Saline-alkali land refers to a type of soil that contains excessive soluble salts (such as sodium chloride and sodium sulfate) and alkaline substances (such as sodium carbonate and sodium bicarbonate), resulting in poor soil permeability and aeration, which is detrimental to the growth of most crops.

[0003] In related technologies, in order to simultaneously solve the problems of aquaculture wastewater treatment and saline-alkali land improvement, the aquaculture wastewater is usually pretreated and then irrigated in the saline-alkali land. This allows the excess salt in the soil to dissolve and seep into the underground pipes with the water, and then be discharged through the underground pipes, thereby reducing the salt content of the surface soil.

[0004] Regarding the aforementioned technologies, when discharging salt-containing water into saline-alkali land through underground pipes, the water seeps into the pipes under the influence of gravity. If the underground pipes are buried too shallowly or the soil is too loose, the water will seep into the pipes too quickly, which can easily lead to low salt solubility in the water and poor improvement of the saline-alkali land. There is still room for improvement. Summary of the Invention

[0005] To ensure effective improvement of saline-alkali land, this application provides a water cycle-based method, system, and terminal for saline-alkali land management.

[0006] Firstly, this application provides a method for treating saline-alkali land based on water cycle, employing the following technical solution:

[0007] Water cycle-based methods for saline-alkali land management include:

[0008] The system controls a pre-set irrigation device to irrigate the pre-set treated wastewater into a pre-set saline-alkali land and obtains the wastewater irrigation time.

[0009] Determine whether the tailwater irrigation time meets the preset infiltration irrigation time requirements;

[0010] If it does not meet the requirements, the process continues to obtain the tailwater irrigation time and perform a cyclical judgment.

[0011] If the conditions are met, the preset pressure device will be controlled to increase the pressure on the preset underground pipe to promote the dissolution of salt in the saline-alkali land into the treated wastewater.

[0012] Obtain the dissolution completion trigger signal;

[0013] The pressure device is controlled to reduce the pressure in the underground pipe based on the dissolution completion trigger signal, so as to promote the seepage of treated wastewater into the underground pipe for discharge.

[0014] By adopting the above technical solution, after the irrigation device irrigates the treated wastewater into the saline-alkali land, and when it is determined that the irrigation time of the wastewater meets the requirements of the infiltration irrigation time, the pressure control device increases the pressure of the underground pipe, thereby driving the treated wastewater to remain in the saline-alkali land to promote salt dissolution. After dissolution is completed, the pressure control device decreases the pressure of the underground pipe, thereby promoting the rapid infiltration of the treated wastewater into the underground pipe and discharge it from the saline-alkali land, so as to carry the salt away from the saline-alkali land, thus ensuring a good saline-alkali land improvement effect.

[0015] Optionally, the step of controlling a preset pressure device to increase the pressure of a preset underground pipe to promote the dissolution of salt in the saline-alkali land into the treated wastewater includes:

[0016] Obtain the salt dissolution time;

[0017] The salt dissolution time was determined to be in line with the requirements for tailwater irrigation time.

[0018] If the conditions are met, a preset dissolution completion trigger signal will be output;

[0019] If the conditions are not met, the salt dissolution time and tailwater irrigation time will be analyzed to determine the remaining dissolution time.

[0020] Obtain pressure from concealed pipes;

[0021] The pressure is increased by a pressure control device based on the pressure enhancement of the underground pipe and the remaining dissolution time, so as to promote the dissolution of salt in the saline-alkali land into the treated wastewater.

[0022] By adopting the above technical solution, when the salt dissolution time meets the requirements of the tailwater irrigation time, it indicates that the salt has dissolved in the treated tailwater during the infiltration process. Therefore, a dissolution completion trigger signal is directly output. If it does not meet the requirements, the remaining dissolution time is determined based on the salt dissolution time and the tailwater irrigation time. The remaining dissolution time is used to control the pressure device to increase the pressure of the underground pipe to the enhanced pressure of the underground pipe, thereby promoting salt dissolution and ensuring a good saline-alkali land improvement effect.

[0023] Optionally, the steps for obtaining the enhanced pressure of the concealed pipe include:

[0024] Obtain the soil hydraulic conductivity coefficient;

[0025] The soil hydraulic conductivity coefficient and tailwater irrigation time were analyzed to determine the influence radius of the subsurface pipe;

[0026] The soil hydraulic conductivity coefficient, the radius of influence of the underground pipe, the preset tailwater density, the preset underground pipe radius, and the preset gravitational acceleration are analyzed to determine the soil underground pipe constant.

[0027] The remaining dissolution time and the preset remaining penetration depth are analyzed to determine the tailwater flow parameters;

[0028] Obtain soil pressure in saline-alkali land;

[0029] The soil pressure, tailwater flow parameters, and soil culvert constant were analyzed to determine the pressure enhancement of the culvert.

[0030] By adopting the above technical solution, the soil detection pressure, tailwater flow parameters and soil underground pipe constant are analyzed to determine the underground pipe enhanced pressure, thereby ensuring that after the underground pipe enhanced pressure is applied, the treated tailwater can remain in the soil to wait for salt dissolution, thus improving the accuracy and reliability of the underground pipe enhanced pressure.

[0031] Optionally, the steps to determine the enhanced pressure of the underground pipe by analyzing soil pressure, tailwater flow parameters, and soil pipe constant include:

[0032] The soil pressure, tailwater flow parameters, and soil culvert constant were analyzed to determine the total pressure of the culvert.

[0033] The total pressure of the concealed pipe and the preset atmospheric pressure are analyzed to determine the pressure amplitude of the concealed pipe.

[0034] The remaining dissolution time was analyzed to determine the pressure oscillation frequency;

[0035] The atmospheric pressure, the pressure amplitude of the dark pipe, the pressure oscillation frequency, and the preset sine function are analyzed to determine the enhanced pressure of the dark pipe.

[0036] By adopting the above technical solution, the difference between the total pressure of the underground pipe and the atmospheric pressure is calculated to obtain the pressure amplitude of the underground pipe. Then, the atmospheric pressure, the pressure amplitude of the underground pipe, the pressure oscillation frequency and the sine function are analyzed to obtain the pressure enhancement of the underground pipe, so that the pressure inside the underground pipe vibrates according to the sine wave, so that the treated wastewater approaches the underground pipe and then moves away from the underground pipe, thereby allowing the treated wastewater to wash the soil, thus ensuring a good effect of saline-alkali land improvement.

[0037] Optionally, the steps for obtaining the salt dissolution time include:

[0038] To determine the types of dissolved salts in saline-alkali land;

[0039] The salt diffusion coefficient is determined based on the type of dissolved salt and the preset salt diffusion relationship;

[0040] Obtain the length of the dissolution feature;

[0041] The dissolution characteristic length and salt diffusion coefficient were analyzed to determine the salt dissolution time.

[0042] By adopting the above technical solution, the salt diffusion coefficient is determined based on the type of dissolved salt and the salt diffusion relationship. Then, the salt dissolution time is calculated based on the dissolution characteristic length and the salt diffusion coefficient, thereby improving the accuracy of the salt dissolution time.

[0043] Optionally, the step of controlling the pressure device to reduce the pressure in the concealed pipe based on the dissolution completion trigger signal to promote the seepage of treated wastewater into the concealed pipe for discharge includes:

[0044] The target seepage velocity is obtained based on the dissolution completion trigger signal;

[0045] Analyze the target seepage velocity to determine the pressure reduction in the concealed pipe;

[0046] The pressure reduction device in the concealed pipe reduces the pressure in order to promote the seepage of treated wastewater into the concealed pipe for discharge.

[0047] By adopting the above technical solution, the pressure reduction of the underground pipe is determined after analyzing the target seepage velocity. Then, the pressure reduction device is controlled to reduce the pressure of the underground pipe, thereby promoting the seepage of treated wastewater into the underground pipe for discharge, thus ensuring a good saline-alkali land improvement effect.

[0048] Optionally, the step of obtaining the target seepage velocity based on the dissolution completion trigger signal includes:

[0049] Obtain soil porosity, target salt discharge depth, and maximum drainage time;

[0050] Soil porosity, target salt discharge depth, and maximum drainage time were analyzed to determine the efficiency constraint rate.

[0051] To obtain the soil's inherent permeability, effective soil stress, and tailwater dynamic viscosity;

[0052] The inherent permeability of the soil, the effective stress of the soil, the dynamic viscosity of the tailwater, the preset safety factor, and the preset radius of the underground pipe are analyzed to determine the stability constraint rate.

[0053] The efficiency-constrained velocity and stability-constrained velocity are analyzed to determine the target seepage velocity.

[0054] By adopting the above technical solution, the efficiency constraint velocity is determined after analyzing soil porosity, target salt discharge depth and maximum drainage time. Then, the stability constraint velocity is determined after analyzing soil inherent permeability, soil effective stress, tailwater dynamic viscosity, preset safety factor and underground pipe radius. Thus, the minimum between the efficiency constraint velocity and the stability constraint velocity is selected as the target seepage velocity to ensure the efficiency and stability of the seepage process.

[0055] Optionally, analyzing the target seepage velocity to determine the steps for reducing pressure in the concealed pipe includes:

[0056] Obtain soil water pressure and discharge radius of influence;

[0057] The discharge influence radius, tailwater dynamic viscosity, soil inherent permeability, target seepage velocity, preset underground pipe radius, preset underground pipe depth, preset tailwater density, and preset gravitational acceleration are analyzed to determine the pressure correction term.

[0058] The soil water pressure and pressure correction terms were analyzed to determine the pressure reduction caused by the underground pipe.

[0059] By adopting the above technical solution, the influence radius of discharge, dynamic viscosity of tailwater, inherent soil permeability, target seepage velocity, radius of underground pipe, depth of underground pipe, density of tailwater and gravitational acceleration are analyzed to determine the pressure correction term. Then, the sum of soil water pressure and pressure correction term is calculated to obtain the pressure reduction of underground pipe, thereby improving the accuracy and reliability of pressure reduction of underground pipe.

[0060] Secondly, this application provides a water cycle-based saline-alkali land treatment system, which adopts the following technical solution:

[0061] A water cycle-based saline-alkali land management system includes:

[0062] The acquisition module is used to acquire the tailwater irrigation time and the dissolution completion trigger signal;

[0063] A memory for storing programs for water cycle-based saline-alkali land management methods as described in any of the preceding items;

[0064] The processor and the program in the memory can be loaded and executed by the processor to implement the water cycle-based saline-alkali land management method as described in any of the above.

[0065] By adopting the above technical solution, the processor loads and executes the program of the water cycle-based saline-alkali land treatment method stored in the memory, and the control acquisition module acquires a series of data related to the water cycle-based saline-alkali land treatment. Then, after the irrigation device irrigates the saline-alkali land with the treated wastewater, when it is determined that the irrigation time of the wastewater meets the requirements of the infiltration irrigation time, the pressure device is controlled to increase the pressure of the underground pipe, thereby driving the treated wastewater to remain in the saline-alkali land to promote salt dissolution. After dissolution is completed, the pressure device is controlled to decrease the pressure of the underground pipe, thereby promoting the rapid infiltration of the treated wastewater into the underground pipe and discharge it from the saline-alkali land, so as to remove the salt from the saline-alkali land, thus ensuring a good saline-alkali land improvement effect.

[0066] Thirdly, this application provides a smart terminal, which adopts the following technical solution:

[0067] A smart terminal includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any of the preceding claims for the water cycle-based saline-alkali land management method.

[0068] By adopting the above technical solution, and by operating the intelligent terminal, the processor loads and executes the computer program of the water cycle-based saline-alkali land treatment method stored in the memory. After the irrigation device irrigates the saline-alkali land with the treated wastewater, when it is determined that the irrigation time meets the requirements of the infiltration irrigation time, the pressure device is controlled to increase the pressure on the underground pipe, thereby driving the treated wastewater to remain in the saline-alkali land to promote salt dissolution. After dissolution is completed, the pressure device is controlled to decrease the pressure on the underground pipe, thereby promoting the rapid infiltration of the treated wastewater into the underground pipe and discharge it from the saline-alkali land, so as to remove the salt from the saline-alkali land and thus ensure a good saline-alkali land improvement effect.

[0069] In summary, this application includes at least one of the following beneficial technical effects:

[0070] 1. After the treated wastewater is irrigated into the saline-alkali land by the irrigation device, when it is determined that the irrigation time of the wastewater meets the requirements of the infiltration irrigation time, the pressure device is controlled to increase the pressure of the underground pipe, thereby driving the treated wastewater to remain in the saline-alkali land to promote salt dissolution. After dissolution is completed, the pressure device is controlled to decrease the pressure of the underground pipe, thereby promoting the rapid infiltration of the treated wastewater into the underground pipe and discharge it from the saline-alkali land, so as to carry the salt away from the saline-alkali land, thus ensuring a good saline-alkali land improvement effect.

[0071] 2. By calculating the difference between the total pressure in the underground pipe and the atmospheric pressure, the pressure amplitude in the underground pipe is obtained. Then, by analyzing the atmospheric pressure, the pressure amplitude in the underground pipe, the pressure oscillation frequency, and the sine function, it is found that the pressure in the underground pipe is enhanced, so that the pressure in the underground pipe vibrates according to a sine wave. This causes the treated wastewater to approach the underground pipe and then move away from it, thereby allowing the treated wastewater to wash the soil and thus ensure a good effect on the improvement of saline-alkali land.

[0072] 3. After analyzing the target seepage velocity, the pressure reduction of the underground pipe is determined. Based on the pressure reduction of the underground pipe, the pressure reduction device is controlled to reduce the pressure of the underground pipe, thereby promoting the seepage of treated wastewater into the underground pipe for discharge, thus ensuring a good saline-alkali land improvement effect. Attached Figure Description

[0073] Figure 1 This is a flowchart of a water cycle-based method for treating saline-alkali land in an embodiment of this application.

[0074] Figure 2 This is a flowchart illustrating the steps in this application embodiment of controlling a preset pressure device to increase the pressure on a preset underground pipe in order to promote the dissolution of salt in saline-alkali land into the treated wastewater.

[0075] Figure 3This is a flowchart of the steps for obtaining enhanced pressure in a concealed pipe in an embodiment of this application.

[0076] Figure 4 This is a flowchart of the steps in this application embodiment to analyze soil detection pressure, tailwater flow parameters and soil culvert constant to determine the culvert enhanced pressure.

[0077] Figure 5 This is a flowchart of the steps for obtaining the salt dissolution time in the embodiments of this application.

[0078] Figure 6 This is a flowchart illustrating the steps in this application where a pressure device is controlled to reduce the pressure in a concealed pipe based on a dissolution completion trigger signal, thereby promoting the seepage of treated wastewater into the concealed pipe for discharge.

[0079] Figure 7 This is a flowchart of the steps for obtaining the target seepage velocity based on the dissolution completion trigger signal in the embodiments of this application.

[0080] Figure 8 This is a flowchart of the steps in this application embodiment to analyze the target seepage velocity in order to determine the pressure reduction of the concealed pipe. Detailed Implementation

[0081] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figures 1 to 8 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0082] This application discloses a water cycle-based method for saline-alkali land remediation, specifically a treatment terminal, an irrigation device, a submerged pipe, and a pressure device. The treatment terminal is communicatively connected to both the irrigation device and the pressure device to achieve data exchange and control. After the operator controls the irrigation device to irrigate the saline-alkali land with treated wastewater, the treatment terminal times the irrigation time. When the treatment terminal determines that the irrigation time meets the infiltration irrigation time requirements, it controls the pressure device to increase the pressure in the submerged pipe, thereby slowing down the rate at which the treated wastewater infiltrates into the submerged pipe, allowing the salt in the soil to fully dissolve into the treated wastewater. After receiving a dissolution completion trigger signal, the treatment terminal controls the pressure device to decrease the pressure in the submerged pipe, thereby promoting the infiltration of wastewater into the submerged pipe for discharge into the saline-alkali land, thus ensuring a good saline-alkali land improvement effect.

[0083] Reference Figure 1 This application discloses a method for treating saline-alkali land based on water cycle, including the following steps:

[0084] Step S100: Control the preset irrigation device to irrigate the preset treated wastewater into the preset saline-alkali land, and obtain the wastewater irrigation time.

[0085] Irrigation equipment refers to devices used to irrigate treated wastewater into saline-alkali land. Sprinkler or drip irrigation methods can be used, with the specific device selected by the operator based on actual needs. Treated wastewater refers to pre-treated aquaculture wastewater. Suspended particles are removed through sedimentation and filtration, organic pollutants are degraded by microorganisms, and pathogens are eliminated before treatment. Saline-alkali land refers to land awaiting salt leaching by treated wastewater.

[0086] The tailwater irrigation time refers to the time that the irrigation device takes to irrigate the treated tailwater in the saline-alkali land. After the irrigation device is started, it sends a timing command to the treatment terminal, and the treatment terminal responds to the timing command and calculates the time.

[0087] Step S101: Determine whether the tailwater irrigation time meets the preset infiltration irrigation time requirements.

[0088] The infiltration irrigation time refers to the time it takes for the treated wastewater to infiltrate into the soil to a specified depth. This specified depth is determined by the operator by subtracting a depth allowance from the burial depth of the underground pipes, ensuring sufficient time for pressure adjustment. The infiltration irrigation time is determined by the operator pre-installing a humidity sensor at the specified depth in the saline-alkali land and timing the irrigation. The time after the humidity sensor detects moisture is the infiltration irrigation time. The requirement is that the infiltration irrigation time must be equal to the total infiltration irrigation time.

[0089] By processing the terminal to determine whether the tailwater irrigation time is equal to the infiltration irrigation time, it can be determined whether the pressure of the underground pipe needs to be controlled.

[0090] Step S1011: If it does not meet the requirements, continue to obtain the tailwater irrigation time for cyclical judgment.

[0091] If the treatment terminal determines that the tailwater irrigation time is not equal to the infiltration irrigation time, it indicates that the treated tailwater has not yet infiltrated to the specified depth for pressure adjustment. Therefore, the tailwater irrigation time will continue to be monitored, and the treated tailwater will be allowed to infiltrate.

[0092] Step S1012: If the conditions are met, control the preset pressure device to increase the pressure on the preset underground pipe to promote the dissolution of salt in the saline-alkali land into the treated wastewater.

[0093] If the treatment terminal determines that the effluent irrigation time equals the infiltration irrigation time, it indicates that the treated effluent has infiltrated to the designated depth for pressure adjustment. Therefore, the pressure-increasing device is used to increase the pressure in the underground pipe. The specific method is described in [reference needed]. Figure 2 This process slows down the infiltration rate of treated wastewater into the saline-alkali land, ensuring that the salt in the saline-alkali land is fully dissolved in the treated wastewater.

[0094] A pressure regulating device is a device used to adjust the pressure inside a concealed pipe. It can be an air pump, installed at the end of the concealed pipe, which adjusts the pressure by filling or evacuating the pipe. A concealed pipe is a pipeline used to drain treated wastewater containing dissolved salt from saline-alkali land. The layout of the concealed pipe is determined by the operators based on actual needs.

[0095] Step S102: Obtain the dissolution completion trigger signal.

[0096] The dissolution completion trigger signal refers to the triggering condition when salts are fully dissolved in the treated effluent. The treatment terminal compares the dissolution time and irrigation time, and activates the dissolution completion trigger signal after determining that the irrigation time equals the dissolution time.

[0097] Step S103: Based on the dissolution completion trigger signal, control the pressure device to reduce the pressure in the concealed pipe to promote the seepage of treated wastewater into the concealed pipe for discharge.

[0098] Upon receiving the dissolution completion trigger signal, the processing terminal responds by controlling the pressure device to reduce the pressure in the dark tube. The specific method is described in [reference needed]. Figure 6 The steps are to promote the infiltration of treated wastewater into the underground pipes and discharge it into the saline-alkali land, thus ensuring a good effect on the improvement of saline-alkali land.

[0099] Reference Figure 2 The steps of controlling a preset pressure device to increase the pressure of a preset underground pipe to promote the dissolution of salt in the saline-alkali land into the treated wastewater include:

[0100] Step S200: Obtain the salt dissolution time.

[0101] Salt dissolution time refers to the time it takes for salts to fully dissolve in the treated effluent. The specific method for obtaining this time is described in [reference needed]. Figure 5 The steps.

[0102] Step S201: Determine whether the salt dissolution time meets the requirements for tailwater irrigation time.

[0103] The requirement for tailwater irrigation time is that it should not exceed the tailwater irrigation time. The treatment terminal determines whether the salt dissolution time is not greater than the tailwater irrigation time, thus determining whether pressure enhancement is necessary.

[0104] Step S2011: If the condition is met, output the preset dissolution completion trigger signal.

[0105] If the treatment terminal determines that the salt dissolution time is no greater than the tailwater irrigation time, it indicates that the salt has been fully dissolved before the treated tailwater has penetrated to the specified depth. Therefore, there is no need to increase the pressure, and a dissolution completion trigger signal is output.

[0106] The dissolution completion trigger signal in this step is the same as the dissolution completion trigger signal in step S102, and will not be described again here.

[0107] Step S2012: If not, analyze the salt dissolution time and tailwater irrigation time to determine the remaining dissolution time.

[0108] If the treatment terminal determines that the salt dissolution time is longer than the tailwater irrigation time, it indicates that the salt has not fully dissolved when the treated tailwater seeps to the specified depth. Therefore, the remaining dissolution time is determined after analyzing the salt dissolution time and tailwater irrigation time, providing data support for the subsequent pressure control device to increase the pressure.

[0109] The remaining dissolution time refers to the time required for salts to fully dissolve in the treated effluent, which is calculated from the difference between the salt dissolution time and the effluent irrigation time at the treatment terminal.

[0110] Step S202: Obtain the enhanced pressure of the concealed pipe.

[0111] Among them, the enhanced pressure of the concealed pipe refers to the adjustment data of the pressure device on the pressure of the concealed pipe. The specific method for obtaining it is referred to Figure 3 The steps.

[0112] Step S203: Based on the enhanced pressure of the underground pipe and the remaining dissolution time, the pressure device is used to enhance the pressure of the underground pipe to promote the dissolution of salt in the saline-alkali land into the treated wastewater.

[0113] In this process, after the treatment terminal determines the pressure enhancement of the underground pipe, the treatment terminal controls the pressure enhancement device to enhance the pressure of the underground pipe during the remaining dissolution time, thereby slowing down the seepage rate of the treated wastewater in the soil and allowing the salt in the saline-alkali land to fully dissolve in the treated wastewater.

[0114] Reference Figure 3 The steps for obtaining enhanced pressure through a concealed pipe include:

[0115] Step S300: Obtain the soil hydraulic conductivity coefficient.

[0116] The soil hydraulic conductivity coefficient refers to the permeability of the soil, measured in meters per second. It depends on the soil type. Operators create a mapping table that maps different soil types to hydraulic conductivity coefficients, and the processing terminal looks up the hydraulic conductivity coefficient in the mapping table according to the soil type.

[0117] Step S301: Analyze the soil hydraulic conductivity coefficient and tailwater irrigation time to determine the influence radius of the underground pipe.

[0118] The influence radius of the underground pipe refers to the range of influence of the underground pipe on soil moisture. It is obtained by the treatment terminal after calculating the soil hydraulic conductivity coefficient and the tailwater irrigation time. The specific calculation process is as follows: the square root of the product of the soil hydraulic conductivity coefficient and the tailwater irrigation time is multiplied by an empirical constant to obtain the influence radius of the underground pipe. In this embodiment, the empirical constant is 1.5, which is obtained by the operator during the experiment.

[0119] Step S302: Analyze the soil hydraulic conductivity coefficient, the radius of influence of the underground pipe, the preset tailwater density, the preset underground pipe radius, and the preset gravitational acceleration to determine the soil underground pipe constant.

[0120] Among them, the effluent density refers to the density value of the treated effluent, which is obtained by the operator after measuring the treated effluent and stored in the treatment terminal. The concealed pipe radius refers to the radius value of the concealed pipe, which is stored by the operator in the treatment terminal. In this embodiment of the application, the gravitational acceleration is taken as 9.81 meters per second squared.

[0121] The soil duct constant refers to the soil's ability to transfer water to the duct. The larger the soil duct constant, the higher the drainage efficiency of the soil duct system. It is obtained by the treatment terminal after calculating the soil hydraulic conductivity coefficient, the radius of influence of the duct, the tailwater density, the duct radius, and the gravitational acceleration. The specific calculation process is as follows: First, calculate the first product of 2π and the soil hydraulic conductivity coefficient. Then, calculate the quotient of the duct radius of influence and the duct radius. Calculate the logarithm of the quotient with e as the base and multiply it by the tailwater density and the gravitational acceleration to obtain the second product. Finally, calculate the quotient of the first product and the second product to obtain the soil duct constant.

[0122] Step S303: Analyze the remaining dissolution time and the preset remaining penetration depth to determine the tailwater flow parameters.

[0123] Among them, the tailwater flow parameter refers to the flow velocity of the treated tailwater in the soil after control, which is obtained by calculating the quotient of the remaining infiltration depth and half of the remaining dissolution time at the treatment terminal.

[0124] Step S304: Obtain soil pressure in saline-alkali land.

[0125] Among them, soil pressure refers to the average pressure in the soil, which is obtained by measuring the tensiometer and is considered to be short-term constant.

[0126] Step S305: Analyze the soil pressure, tailwater flow parameters, and soil culvert constant to determine the culvert-enhanced pressure.

[0127] The enhanced pressure of the underground pipe in this step is consistent with the enhanced pressure of the underground pipe in step S202. It is obtained by analyzing the soil detection pressure, tailwater flow parameters, and soil underground pipe constants at the processing terminal. The specific method is as follows: Figure 4The steps.

[0128] Reference Figure 4 The steps to determine the enhanced pressure of the underground pipe, based on the analysis of soil pressure, tailwater flow parameters, and soil pipe constant, include:

[0129] Step S400: Analyze the soil pressure, tailwater flow parameters, and soil culvert constant to determine the total pressure of the culvert.

[0130] The total pressure in the underground pipe refers to the maximum total pressure inside the underground pipe, which is obtained by calculating the quotient of the tailwater flow parameters and the soil underground pipe constant at the treatment terminal, and then calculating the difference between the soil detection pressure and the quotient.

[0131] Step S401: Analyze the total pressure of the dark pipe and the preset atmospheric pressure to determine the pressure amplitude of the dark pipe.

[0132] Atmospheric pressure refers to the atmospheric pressure in saline-alkali areas, which is measured by a barometer.

[0133] The pressure amplitude of a concealed pipe refers to the adjustment range of the pressure inside the concealed pipe, which is obtained by calculating the difference between the total pressure of the concealed pipe and the atmospheric pressure using the processing terminal.

[0134] Step S402: Analyze the remaining dissolution time to determine the pressure oscillation frequency.

[0135] The pressure oscillation frequency refers to the number of times the pressure is adjusted per unit time, which is obtained by calculating the reciprocal of the remaining dissolution time from the processing terminal.

[0136] Step S403: Analyze the atmospheric pressure, the pressure amplitude of the dark pipe, the pressure oscillation frequency, and the preset sine function to determine the enhanced pressure of the dark pipe.

[0137] The sine function refers to the function that controls the pressure adjustment as a periodic sinusoidal fluctuation, with time as the unknown.

[0138] The enhanced pressure of the dark pipe in this step is the same as the enhanced pressure of the dark pipe in step S305. It is obtained by the processing terminal using the pressure oscillation frequency as the frequency of the sine function, and then adding the atmospheric pressure to the product of the dark pipe pressure amplitude and the sine function.

[0139] Reference Figure 5 The steps for obtaining the salt dissolution time include:

[0140] Step S500: Obtain the type of dissolved salt in the saline-alkali land.

[0141] The dissolved salt type refers to the type of dissolved salt, which is obtained by the operator after detecting the salt content in the saline-alkali land and inputting the data into the processing terminal.

[0142] Step S501: Determine the salt diffusion coefficient based on the type of dissolved salt and the preset salt diffusion relationship.

[0143] Among them, the salt diffusion relationship refers to the correspondence between different salts and diffusion coefficients. Operators find the diffusion coefficients of different salts and form a mapping table by matching different salts with diffusion coefficients one by one.

[0144] The salt diffusion coefficient refers to the diffusion coefficient of salt in water. The treatment terminal finds the diffusion coefficient of all different salts in the mapping table corresponding to the salt diffusion relationship according to the type of dissolved salt, and selects the smallest diffusion coefficient as the salt diffusion coefficient. When calculating the dissolution time, it is ensured that all salts can be fully dissolved within the dissolution time.

[0145] Step S502: Obtain the dissolution feature length.

[0146] The dissolution characteristic length refers to the distance that salt needs to diffuse. In this embodiment, the dissolution characteristic length is the distance between soil particles.

[0147] Step S503: Analyze the dissolution characteristic length and salt diffusion coefficient to determine the salt dissolution time.

[0148] The salt dissolution time in this step is the same as the salt dissolution time in step S200, and is obtained by calculating the quotient of the square of the dissolution characteristic length and the salt diffusion coefficient by the processing terminal.

[0149] Reference Figure 6 The steps of controlling the pressure device to reduce the pressure in the concealed pipe based on the dissolution completion trigger signal to promote the seepage of treated wastewater into the concealed pipe for discharge include:

[0150] Step S600: Obtain the target seepage velocity based on the dissolution completion trigger signal.

[0151] The target seepage velocity refers to the velocity at which treated wastewater seeps into the underground pipe. The specific method for obtaining this velocity is described in [reference needed]. Figure 7 The steps.

[0152] Step S601: Analyze the target seepage velocity to determine the pressure reduction of the concealed pipe.

[0153] Among them, the pressure reduction in the concealed pipe refers to the pressure that promotes the infiltration of treated effluent into the concealed pipe. This is determined by analyzing the target seepage velocity at the treatment terminal. Specific methods are described in [reference needed]. Figure 8 The steps.

[0154] Step S602: The pressure control device reduces the pressure in the concealed pipe to promote the seepage of treated wastewater into the concealed pipe for discharge.

[0155] In this process, after the treatment terminal determines the pressure reduction in the underground pipe, the treatment terminal controls the pressure device to reduce the pressure inside the underground pipe to the pressure reduction pressure, thereby promoting the rapid infiltration of the treated wastewater in the soil into the underground pipe, and thus expelling the salt from the saline-alkali land.

[0156] Reference Figure 7 The steps for obtaining the target seepage velocity based on the dissolution completion trigger signal include:

[0157] Step S700: Obtain soil porosity, target salt discharge depth, and maximum drainage time.

[0158] Soil porosity refers to the volume ratio of voids in the soil, obtained by operators through actual testing of the saline-alkali land. Target desalination depth refers to the depth from the surface of the saline-alkali land to the underground pipe, obtained by operators inputting this information into the treatment terminal. Maximum drainage time refers to the time required to discharge treated wastewater from the soil into the underground pipe, determined by operators based on actual needs.

[0159] Step S701: Analyze soil porosity, target salt discharge depth, and maximum drainage time to determine the efficiency constraint rate.

[0160] Among them, the efficiency-constrained speed refers to the drainage speed constrained by drainage efficiency, which is obtained by calculating the product of soil porosity and target salt discharge depth at the treatment terminal, and then calculating the quotient of the product with the maximum drainage time.

[0161] Step S702: Obtain the soil's inherent permeability, effective soil stress, and tailwater dynamic viscosity.

[0162] Soil inherent permeability refers to the ability of water to pass through the soil medium under a unit hydraulic gradient, which is obtained by operators through constant head permeability tests.

[0163] Effective soil stress refers to the force borne at the contact points of soil particles. It is obtained by calculating the total stress by multiplying the soil's unit weight and depth at the treatment terminal, and then measuring the pore water pressure to calculate the difference between the total stress and the pore water pressure.

[0164] The dynamic viscosity of wastewater refers to the frictional force within a water fluid that resists relative motion. It is obtained by operators directly measuring the dynamic viscosity of treated wastewater in a laboratory environment using a rotational viscometer.

[0165] Step S703: Analyze the inherent permeability of the soil, the effective stress of the soil, the dynamic viscosity of the tailwater, the preset safety factor, and the preset radius of the underground pipe to determine the stability constraint rate.

[0166] The safety factor refers to an empirical amplification factor that ensures the seepage velocity under stable soil conditions. It is obtained by the operator testing the soil's maximum bearing capacity and the actual working load, and then calculating the quotient of the maximum bearing capacity and the actual working load. The culvert radius refers to the radius value of half the culvert, which is obtained by the operator inputting it into the processing terminal.

[0167] The stability constraint velocity refers to the seepage velocity constrained by soil stability. It is calculated by multiplying the soil's inherent permeability and effective soil stress at the treatment terminal, then multiplying the tailwater dynamic viscosity, safety factor, and culvert radius, and finally calculating the quotient of the first and second products.

[0168] Step S704: Analyze the efficiency-constrained velocity and the stability-constrained velocity to determine the target seepage velocity.

[0169] In this step, the target seepage velocity is the same as that in step S600. The processing terminal compares the efficiency constraint velocity and the stability constraint velocity to select the minimum velocity as the target seepage velocity.

[0170] Reference Figure 8 The steps for analyzing the target seepage velocity to determine the pressure reduction in the concealed pipe include:

[0171] Step S800: Obtain soil water pressure and discharge radius.

[0172] Among them, soil water pressure refers to the force exerted by pore water in the soil on the soil particle skeleton, which is detected by a tensiometer and sent to the processing terminal.

[0173] The radius of influence of the discharge in this step is the same as the radius of influence of the concealed pipe in step S301, and will not be described again here.

[0174] Step S801: Analyze the discharge influence radius, tailwater dynamic viscosity, soil inherent permeability, target seepage velocity, preset underground pipe radius, preset underground pipe depth, preset tailwater density, and preset gravitational acceleration to determine the pressure correction term.

[0175] The culvert radius, tailwater density, and gravitational acceleration in this step are the same as those in step S302, and will not be repeated here. The culvert depth refers to the depth of the culvert in the soil, which is obtained by the operator inputting it into the processing terminal.

[0176] The pressure correction term refers to the influence of tailwater viscosity, drainage velocity, culvert shape, and gravity on pressure. It is calculated by the treatment terminal based on the discharge influence radius, tailwater dynamic viscosity, soil inherent permeability, target seepage velocity, culvert radius, culvert depth, tailwater density, and gravitational acceleration. The specific calculation method is as follows: First, calculate the first quotient of tailwater dynamic viscosity and soil inherent permeability. Then, calculate the second quotient of discharge influence radius and culvert radius. Calculate the logarithm of the second quotient with base e. Finally, calculate the product of the first quotient, target seepage velocity, logarithm of the second quotient with base e, tailwater density, gravitational acceleration, and culvert depth.

[0177] Step S802: Analyze the soil water pressure and pressure correction term to determine the pressure reduction caused by the underground pipe.

[0178] In this step, the pressure reduction through the underground pipe is consistent with the pressure reduction through the underground pipe in step S601, and is obtained by calculating the difference between the soil water pressure and the pressure correction term by the processing terminal.

[0179] Based on the same inventive concept, embodiments of this application provide a water cycle-based saline-alkali land treatment system, comprising:

[0180] The acquisition module is used to acquire the tailwater irrigation time, dissolution completion trigger signal, salt dissolution time, underground pipe enhanced pressure, soil hydraulic conductivity, soil detection pressure, dissolved salt type, dissolution characteristic length, target seepage velocity, soil porosity, target salt discharge depth, maximum drainage time, soil inherent permeability, soil effective stress, tailwater dynamic viscosity, soil water pressure, and discharge influence radius.

[0181] A memory used to store programs for water cycle-based methods for managing saline-alkali land;

[0182] The processor can load and execute programs in memory to implement a water cycle-based method for managing saline-alkali land.

[0183] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0184] This application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as a water cycle-based method for managing saline-alkali land.

[0185] Computer storage media include, for example, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0186] Based on the same inventive concept, this application provides a smart terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded and executed by the processor to perform a water cycle-based method for the treatment of saline-alkali land.

[0187] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0188] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A method for treating saline-alkali land based on water cycle, characterized in that, include: The system controls a pre-set irrigation device to irrigate the pre-set treated wastewater into a pre-set saline-alkali land and obtains the wastewater irrigation time. Determine whether the irrigation time of the treated wastewater meets the preset requirement of the infiltration irrigation time; the infiltration irrigation time refers to the time it takes for the treated wastewater to infiltrate into the soil to a specified depth, and the requirement of the infiltration irrigation time means that it is equal to the infiltration irrigation time. If it does not meet the requirements, the process continues to obtain the tailwater irrigation time and perform a cyclical judgment. If the conditions are met, the preset pressure device will be controlled to increase the pressure on the preset underground pipe to promote the dissolution of salt in the saline-alkali land into the treated wastewater. Obtain the dissolution completion trigger signal; The pressure device is controlled to reduce the pressure in the underground pipe based on the dissolution completion trigger signal, so as to promote the seepage of treated wastewater into the underground pipe for discharge.

2. The method for treating saline-alkali land based on water cycle according to claim 1, characterized in that, The steps of controlling a preset pressure device to increase the pressure of a preset underground pipe to promote the dissolution of salt in saline-alkali land into the treated wastewater include: Obtain the salt dissolution time; Determine whether the salt dissolution time meets the requirements for tailwater irrigation time; If the conditions are met, a preset dissolution completion trigger signal will be output; If the conditions are not met, the salt dissolution time and tailwater irrigation time will be analyzed to determine the remaining dissolution time. Obtain pressure from concealed pipes; The pressure is increased by a pressure control device based on the pressure enhancement of the underground pipe and the remaining dissolution time, so as to promote the dissolution of salt in the saline-alkali land into the treated wastewater.

3. The method for treating saline-alkali land based on water cycle according to claim 2, characterized in that, The steps to obtain enhanced pressure through a concealed pipe include: Obtain the soil hydraulic conductivity coefficient; The soil hydraulic conductivity coefficient and tailwater irrigation time were analyzed to determine the influence radius of the subsurface pipe; The soil hydraulic conductivity coefficient, the radius of influence of the underground pipe, the preset tailwater density, the preset underground pipe radius, and the preset gravitational acceleration are analyzed to determine the soil underground pipe constant. The soil underground pipe constant refers to the soil's ability to transfer water to the underground pipe. The larger the soil underground pipe constant, the higher the drainage efficiency of the soil underground pipe system. The remaining dissolution time and the preset remaining penetration depth are analyzed to determine the tailwater flow parameters; the tailwater flow parameters refer to the flow velocity of the treated tailwater in the soil after control. Obtain soil pressure in saline-alkali land; The soil pressure, tailwater flow parameters, and soil culvert constant were analyzed to determine the pressure enhancement of the culvert.

4. The method for treating saline-alkali land based on water cycle according to claim 3, characterized in that, The steps to determine the enhanced pressure of the underground pipe by analyzing soil pressure, tailwater flow parameters, and soil pipe constant include: The soil pressure, tailwater flow parameters, and soil culvert constant were analyzed to determine the total pressure of the culvert; the total pressure of the culvert refers to the maximum total pressure inside the culvert. The total pressure of the concealed pipe and the preset atmospheric pressure are analyzed to determine the pressure amplitude of the concealed pipe. The remaining dissolution time was analyzed to determine the pressure oscillation frequency; The atmospheric pressure, the pressure amplitude of the dark pipe, the pressure oscillation frequency, and the preset sine function are analyzed to determine the enhanced pressure of the dark pipe.

5. The method for treating saline-alkali land based on water cycle according to claim 2, characterized in that, The steps to obtain the salt dissolution time include: To determine the types of dissolved salts in saline-alkali land; The salt diffusion coefficient is determined based on the type of dissolved salt and the preset salt diffusion relationship; Obtain the dissolution characteristic length; the dissolution characteristic length refers to the distance that salt needs to diffuse. The dissolution characteristic length and salt diffusion coefficient were analyzed to determine the salt dissolution time.

6. The method for treating saline-alkali land based on water cycle according to claim 1, characterized in that, The steps involved in controlling a pressure device to reduce the pressure in the concealed pipe based on a dissolution completion trigger signal, thereby promoting the seepage and discharge of treated wastewater into the concealed pipe, include: The target seepage velocity is obtained based on the dissolution completion trigger signal; Analyze the target seepage velocity to determine the pressure reduction in the concealed pipe; The pressure reduction device in the concealed pipe reduces the pressure in order to promote the seepage of treated wastewater into the concealed pipe for discharge.

7. The method for treating saline-alkali land based on water cycle according to claim 6, characterized in that, The steps for obtaining the target seepage velocity based on the dissolution completion trigger signal include: Obtain soil porosity, target salt discharge depth, and maximum drainage time; Soil porosity, target salt discharge depth, and maximum drainage time were analyzed to determine the efficiency-constrained rate; the efficiency-constrained rate refers to the drainage rate constrained by drainage efficiency. To obtain the soil's inherent permeability, effective soil stress, and tailwater dynamic viscosity; The inherent permeability of the soil, the effective stress of the soil, the dynamic viscosity of the tailwater, the preset safety factor, and the preset radius of the underground pipe are analyzed to determine the stability constraint velocity. The safety factor is an empirical amplification factor that ensures the seepage velocity under the stable state of the soil, and the stability constraint velocity is the seepage velocity constrained by the soil stability. The efficiency-constrained velocity and stability-constrained velocity are analyzed to determine the target seepage velocity.

8. The method for treating saline-alkali land based on water cycle according to claim 7, characterized in that, Analyzing the target seepage velocity to determine the steps for reducing pressure in the concealed pipe includes: Obtain soil water pressure and discharge radius of influence; The discharge influence radius, tailwater dynamic viscosity, soil inherent permeability, target seepage velocity, preset underground pipe radius, preset underground pipe depth, preset tailwater density, and preset gravitational acceleration are analyzed to determine the pressure correction term. The soil water pressure and pressure correction terms were analyzed to determine the pressure reduction caused by the underground pipe.

9. A water cycle-based saline-alkali land management system, characterized in that, include: The acquisition module is used to acquire the tailwater irrigation time and the dissolution completion trigger signal; A memory for storing the program of the water cycle-based saline-alkali land treatment method as described in any one of claims 1 to 8; The processor and the program in the memory can be loaded and executed by the processor to implement the water cycle-based saline-alkali land treatment method as described in any one of claims 1 to 8.

10. A smart terminal, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed as described in any one of claims 1 to 8, which is a water cycle-based method for the treatment of saline-alkali land.

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