Zero-carbon intelligent agricultural development and utilization system and method based on energy gradient utilization

Abstract

The invention relates to a zero-carbon intelligent agricultural development and utilization system and method based on gradient utilization of energy. The system comprises a geothermal well selection and arrangement module, a geothermal water collection and pretreatment module, a heat exchange module, a gradient utilization system construction module, a hot water circulation and reuse module, a working condition flexible adjustment module, an intelligent regulation and control module, a hot spring utilization and recharge system and a system energy storage module. The problems of energy waste, high carbon emission and insufficient agricultural suitability in the traditional technology are solved, and low carbonization and high efficiency of agricultural production are realized.

Description

Technical Field

[0001] The present application relates to the interdisciplinary field of new energy technology and modern agriculture, and in particular to a zero-carbon intelligent agricultural development and utilization system and method based on cascaded energy utilization. Background Art

[0002] As a crucial component of low-carbon, renewable energy, the comprehensive utilization of thermal resources in modern agricultural production still faces numerous technical challenges. Currently, agricultural geothermal development generally relies on extensive direct heat extraction, lacking a systematic, thermodynamic cascade utilization technology. Traditional single-stage heat extraction systems extract heat energy from a single temperature range and fail to implement a temperature-matching mechanism based on the Carnot cycle. This results in over 50% of entropy being lost in the discharge medium, severely limiting the marginal benefits of geothermal energy in facility agriculture.

[0003] Furthermore, in existing geothermal agricultural systems, the direct discharge of geothermal tailwater not only causes thermodynamic contamination of the soil but also poses the risk of secondary salinization due to the migration of mineral components. Monitoring data shows that the electrical conductivity (EC) in typical geothermal irrigation areas generally exceeds 3.0dS / m, reaching the threshold for crop growth stress.

[0004] In addition, some hybrid geothermal systems still rely on gas-fired boilers for peak load regulation and supplemental heating. This hybrid energy supply mode increases the system's carbon emission intensity by 42-67kgCO2 / MWh, which is in significant conflict with the goal of agricultural carbon neutrality. Existing data show that the current design paradigm of geothermal utilization devices faces obvious obstacles to domain migration: thermal equipment derived from the industrial field is difficult to meet the temporal and spatial heterogeneity requirements unique to agricultural scenarios, especially in terms of complex functions such as precise control of greenhouse microclimates, reconstruction of root layer ground temperature fields, and dehumidification of facility environments. There is a lack of modular system architecture design. Existing solutions generally have technical shortcomings such as insufficient heat-humidity-gas coupling control capabilities and limited zone temperature control accuracy (±2.5℃), which cannot meet the needs of multi-objective optimization of modern facility agriculture.

[0005] For example, patent CN 219433515 U proposes a cascade power generation system that couples geothermal and solar energy, but does not address agricultural applications. Patent CN 212065081 U designs a greenhouse facility that combines solar and geothermal energy, but does not address the issue of coordinated energy supply across multiple agricultural sectors. Therefore, there is an urgent need for a geothermal utilization system that is both efficient, low-carbon, and suitable for agriculture. Summary of the Invention

[0006] The present invention provides a system and method that integrates cascade utilization of geothermal energy, multi-energy complementarity and intelligent regulation, which solves the problems of energy waste, high carbon emissions and insufficient agricultural adaptability in traditional technologies, and realizes low-carbon and high-efficiency agricultural production.

[0007] The zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization provided in this application adopts the following technical solutions:

[0008] A zero-carbon intelligent agricultural development and utilization system based on cascaded energy utilization, including a geothermal well selection and layout module, a geothermal water collection and pretreatment module, a heat exchange module, a cascade utilization system construction module, a hot water recycling module, a working condition adjustment module, an intelligent control module, a hot spring utilization and reinjection system, and a system energy storage module;

[0009] The geothermal well selection and arrangement module utilizes a geothermal well with proven reserves as an extraction well for the low-carbon agricultural geothermal energy cascade utilization demonstration project, while selecting another well as a recharge well;

[0010] The geothermal water collection and pretreatment module collects geothermal water through a submersible pump and treats the water using a sand removal and filtration device and a water-to-water heat exchange device;

[0011] The heat exchange module uses clean soft water and geothermal water for heat exchange;

[0012] The said cascade utilization system construction module is used to set a plurality of utilization levels;

[0013] The hot water recycling module is used to return the soft clean water to the soft water heat exchanger for further heat exchange with the geothermal water at 80-120°C;

[0014] The working condition adjustment module is used to realize different arrangements and combinations of cascade utilization processes by setting valves according to seasonal and actual demand changes;

[0015] The intelligent control module is used to build an agricultural Internet of Things node network and deploy multi-parameter environmental sensor terminals;

[0016] Furthermore, it also includes a hot spring utilization and recharge system; the hot spring utilization and recharge system is used to transfer part of the geothermal water that has been cooled after heat exchange into the hot spring water storage tank through the hot spring transportation system; and recharge the remaining geothermal water after treatment.

[0017] Furthermore, it also includes a system energy storage module; the system energy storage module is used to configure a cross-seasonal heat storage underground warehouse, and form a two-way heat exchange system through the buried pipe heat exchanger and the heat storage tank.

[0018] Furthermore, the water-water heat exchange device in the geothermal water collection and pretreatment module uses a detachable plate heat exchanger with a high heat transfer coefficient.

[0019] Furthermore, the cascade utilization system building module includes a four-tier utilization system;

[0020] They are:

[0021] For geothermal power generation, soft clean water at 80-120℃ enters the geothermal generator set. The three-phase AC electricity generated after power generation is rectified and used to meet the energy consumption requirements of the demonstration project system.

[0022] Geothermal cooling and heating, the temperature of soft purified water drops to 70-80℃,

[0023] In summer, hot water enters the generator of the geothermal refrigeration unit, which drives the absorption refrigeration system to produce chilled water for air conditioning and provide cooling for agricultural greenhouses.

[0024] Winter: 70-80℃ soft purified water directly enters the greenhouse heating system;

[0025] Geothermal drying: Soft clean water with a temperature of 55-70°C enters the geothermal drying room and is used for drying agricultural products, aquatic products, seafood or local specialties;

[0026] Soil warming, irrigation water preheating and aquaculture, soft clean water with an outlet temperature of 40-55℃ is used for soil warming and irrigation water preheating.

[0027] Furthermore, a thermodynamic model is established in the intelligent control module based on geothermal wellhead parameters, and a fuzzy adaptive PID controller is used to achieve a reasonable distribution of the dynamic thermal load of the cascade utilization system.

[0028] According to one aspect of the present invention, a method for developing and utilizing zero-carbon intelligent agriculture based on cascaded energy utilization is provided, comprising the following steps:

[0029] Use geothermal wells with proven reserves as extraction wells for the low-carbon agricultural geothermal energy cascade utilization demonstration project, and select another well as a recharge well;

[0030] The geothermal water is collected by a submersible pump and treated by a sand removal filter and a water-to-water heat exchange device;

[0031] Use clean soft water and geothermal water for heat exchange;

[0032] Set up multiple tiered utilization levels;

[0033] The soft clean water is returned to the soft water heat exchanger for further heat exchange with the geothermal water at 80-120℃;

[0034] According to the changes in seasons and actual demand, different arrangements and combinations of cascade utilization processes can be achieved by setting valves;

[0035] Build an agricultural Internet of Things node network and deploy multi-parameter environmental sensing terminals.

[0036] Furthermore, the method further includes: transferring part of the geothermal water cooled after heat exchange into a hot spring water storage tank through a hot spring delivery system; and recharging the remaining geothermal water after treatment;

[0037] A cross-seasonal heat storage underground warehouse is configured, and a two-way heat exchange system is formed through the buried pipe heat exchanger and the heat storage tank.

[0038] According to one aspect of the present invention, a storage medium is provided, in which instructions are stored. When a computer reads the instructions, the computer executes any one of the above-mentioned zero-carbon intelligent agricultural development and utilization methods based on energy cascade utilization.

[0039] According to another aspect of the present invention, an electronic device is provided, comprising a processor and the above-mentioned storage medium, wherein the processor executes instructions in the storage medium.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. Through the graded utilization of geothermal energy (power generation, cooling, heating, drying, soil warming, preheating irrigation, etc.), multi-level efficient conversion and utilization of thermal energy is achieved, which significantly improves resource utilization.

[0042] 2. Using low-carbon renewable geothermal energy to replace traditional energy reduces carbon emissions during system operation. At the same time, through tailwater treatment and reinjection, it prevents soil thermal pollution and secondary salinization risks.

[0043] 3. Integrate the SCADA monitoring system and the agricultural Internet of Things to achieve online multi-parameter monitoring, and use fuzzy PID and machine learning algorithms for dynamic heat load distribution and load forecasting to ensure efficient and coordinated operation of each subsystem.

[0044] 4. The solution supports the complementarity of geothermal energy and solar energy. Through flexible valve control, it can achieve optimized combinations in different seasons and working conditions to meet the multi-objective heating needs of facility agriculture.

[0045] 5. The configuration of phase change heat storage system and cross-seasonal heat storage underground warehouse can effectively balance the fluctuations in energy consumption during the day and night and seasonality, ensuring that the system can fully utilize surplus heat energy even in the non-heating season, thereby improving the overall system stability and sustainability.

[0046] 6. Special consideration is given to the special needs of agricultural facilities (such as greenhouses, nursery beds, edible fungus production, etc.), and through precise temperature and humidity control, the agricultural microclimate is optimized to give priority to high value-added links. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0048] Figure 1 This is a schematic diagram of step utilization in a preferred embodiment of the present invention;

[0049] Figure 2 This is a flow chart of the intelligent production of zero-carbon agriculture in a preferred embodiment of the present invention;

[0050] Figure 3 It is a schematic diagram of an agricultural intelligent production system based on cascade utilization in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to elaborate on the technical solutions adopted by the present invention to achieve the predetermined technical purpose, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments, and the technical means or technical features in the embodiments of the present invention can be replaced without creative work. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0052] The following is combined with Figure 1-3 This application is described in further detail.

[0053] Example 1: This example discloses a zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization, including: geothermal well selection and layout, using geothermal wells with proven reserves (preferably wells with higher water temperature and larger water volume) as mining wells for the low-carbon agricultural geothermal energy cascade utilization demonstration project, and selecting another well as a recharge well.

[0054] The project deployment should be located as close as possible to the line connecting the production well and the reinjection well. The specific location depends on the actual drilling location and geothermal conditions in each place.

[0055] Geothermal water collection and pretreatment: After collecting geothermal water through a submersible pump, the water is treated using a sand removal filter and a water-to-water heat exchanger to prevent scale deposition, ensure equipment efficiency and reduce maintenance costs.

[0056] It is recommended to use a detachable plate heat exchanger with a high heat transfer coefficient for the water-water heat exchange device, and configure two systems, one for backup and one for use, to ensure normal operation during cleaning.

[0057] The heat exchange process and initial utilization utilize clean, soft water and geothermal water to heat the softened water, raising its temperature. Design requirements: Inlet temperature of the soft water heat exchanger: 45-55°C; outlet temperature: 80-120°C. The heated, soft, clean water then enters the geothermal utilization equipment for further processing.

[0058] Cascade utilization system construction:

[0059] First-level utilization - geothermal power generation

[0060] Soft clean water at 80-120℃ enters the geothermal power generation unit.

[0061] It is recommended to adopt the internationally advanced dual-fluid circulation modular unit.

[0062] The three-phase AC power generated after power generation is rectified and used to meet the energy consumption requirements of the demonstration project system.

[0063] Second level utilization - geothermal cooling and heating

[0064] After geothermal power generation, the temperature of soft clean water drops to 70-80℃.

[0065] In summer, hot water enters the generator of the geothermal refrigeration unit, drives the absorption refrigeration system, and produces chilled water for air conditioning, providing cooling for agricultural greenhouses.

[0066] Winter: Soft clean water at 70-80℃ directly enters the greenhouse heating system.

[0067] Design requirements: During heating or cooling, the soft water temperature difference is maintained at 10-15°C (70-80°C at the inlet and 55-70°C at the outlet); the planned area of the agricultural greenhouse needs to be greater than 20,000 square meters, and the heat energy after the first stage of utilization must be used for cooling or heating in both summer and winter.

[0068] The third level of utilization - geothermal drying

[0069] After the first and second stage utilization, the soft clean water with a temperature of 55 to 70°C enters the geothermal drying room and is used for drying agricultural products, aquatic products, seafood or local specialties.

[0070] The temperature difference during the drying process is designed to be 15°C (55-70°C at the inlet and 40-55°C at the outlet); the number and parameters of the drying rooms are configured according to actual needs.

[0071] Fourth level utilization - soil warming, irrigation water preheating and aquaculture

[0072] Soft clean water with an outlet temperature of 40-55°C is used for soil warming and irrigation water preheating.

[0073] The preheating design temperature difference is 15℃ (40~55℃ at the inlet and 25~30℃ at the outlet).

[0074] In addition, the temperature control system can be used to control the incoming water at 25-30℃ to a constant temperature of 25℃ for aquaculture.

[0075] Hot water is recycled and reused. After four-stage cascade utilization, the soft clean water returns to the soft water heat exchanger and exchanges heat with the geothermal water at 80-120℃ again to achieve recycling.

[0076] Flexible adjustment of working conditions: according to the season and actual demand changes, different arrangements and combinations of cascade utilization processes can be achieved by setting valves. For example:

[0077] Winter Plan 1: Geothermal power generation → Geothermal drying → Geothermal heating (greenhouse) → Soil warming, irrigation water preheating → Aquaculture

[0078] Winter Plan 2: Geothermal power generation → Geothermal heating (greenhouse) → Soil warming, irrigation water preheating → Aquaculture

[0079] Summer Option 1: Geothermal Power Generation → Geothermal Cooling (Greenhouse) → Geothermal Drying

[0080] Summer Option 2: Geothermal Power Generation → Geothermal Cooling (Greenhouse)

[0081] Intelligent control module:

[0082] Intelligent control modules are arranged in agricultural greenhouse areas, an agricultural Internet of Things node network is built, and multi-parameter environmental sensing terminals are deployed (to monitor air temperature and humidity, photosynthetically active radiation, soil moisture and heat flux) to achieve online three-dimensional monitoring of the microclimate of facility agriculture.

[0083] A thermodynamic model is established based on geothermal wellhead parameters (temperature, flow rate, and enthalpy), and a fuzzy adaptive PID controller is used to achieve a reasonable distribution of the dynamic thermal load of the cascade utilization system.

[0084] In response to the heating needs of different agricultural scenarios (such as tissue culture seedlings, edible fungus factories, and tropical fruit and vegetable greenhouses), the coupling control of the plate heat exchanger group and the heat pump unit is used to prioritize the high-precision thermal quality requirements of key areas (for example, the bottom of the seedling bed is heated to 35±2℃ and the mushroom room is kept at a constant temperature of 25±0.5℃).

[0085] The module utilizes a load forecasting engine based on a hybrid LSTM-ARIMA algorithm, integrating historical geothermal production data, weather forecasts, and crop growth cycle characteristics to construct a geothermal and solar energy multi-energy complementary optimization model. Monte Carlo simulations are used to verify system robustness, enabling coordinated optimization of the cross-seasonal thermal storage system capacity configuration and ORC generator unit operation strategies, ensuring optimal energy flow density and efficiency for geothermal energy in facility agriculture.

[0086] Hot spring utilization and recharge system:

[0087] After heat exchange, some of the geothermal water (raw water) cools down and enters the hot spring water storage tank through the hot spring delivery system, providing hot spring water for bathing. The hot spring pipe length and number of valves in this system are designed according to the actual project requirements.

[0088] The remaining geothermal water is re-injected after treatment to ensure the sustainable development of geothermal resources and the stable operation of the demonstration project.

[0089] Establish a three-stage geothermal tailwater treatment system, including a cyclone sand removal device, a chemical sedimentation tank and a nano-ceramic membrane filtration unit, to ensure that the suspended matter content of the reinjection fluid is ≤10mg / L and the mineralization is <1500mg / L, meeting the requirements of the "Technical Specifications for Geothermal Fluid Reinjection" (GB / T 38538-2020).

[0090] By using tracer monitoring and numerical inversion technology, combined with hydrogeological parameters such as aquifer porosity and permeability, a three-dimensional reinjection migration model is constructed to achieve sustainable exploitation of geothermal reservoirs under balanced production and injection conditions.

[0091] System energy storage module:

[0092] The design is based on a phase change heat storage array of inorganic hydrated salt (phase change temperature 45-80°C), using a double spiral coil to enhance the heat transfer structure, and the heat storage density reaches 200MJ / m 3 above.

[0093] An underground warehouse for cross-seasonal heat storage is configured, which forms a two-way heat exchange system through the buried pipe heat exchanger and the heat storage tank. The waste geothermal heat is stored in the summer and supplied to the multi-span greenhouse after being heated by the heat pump in the winter.

[0094] During the non-heating season, the surplus heat energy is supplied to the absorption refrigeration unit, realizing the year-round cascade utilization of geothermal energy in agricultural facilities.

[0095] The system integrates a SCADA monitoring system to track energy losses during the heat storage / release process in real time. It optimizes the temperature glide characteristics of the heat storage medium through analysis based on the second law of thermodynamics. Combined with the agricultural heat load curve, it automatically switches between three operating modes: direct heating, heat storage buffering, and heat pump boosting, increasing the comprehensive utilization rate of the geothermal system to over 82%.

[0096] Specific implementation steps:

[0097] Selection and engineering deployment of geothermal wells,

[0098] Proven geothermal wells with high water temperature and large water volume are selected as production wells, and reinjection wells are determined at the same time. The project is deployed on the line connecting the two wells (the specific well location is determined according to actual conditions).

[0099] Cascade utilization module design,

[0100] According to the temperature gradient of geothermal fluid, the following uses are planned in sequence:

[0101] High temperature range (≥80℃): used for flash evaporation electricity or driving absorption refrigerators to cool greenhouses in summer and power agricultural facilities;

[0102] Medium temperature section (40-80℃): Use high temperature heat pumps to improve the quality of waste heat, which is used for heating greenhouses in winter, maintaining constant temperature in aquaculture ponds, and drying agricultural products.

[0103] Low temperature section (≤40℃): The soil is warmed through a buried pipe network, and irrigation water is preheated in combination with solar collectors to reduce winter crop frost damage.

[0104] Intelligent control module,

[0105] Deploy temperature, humidity, light, and soil sensors to collect agricultural environmental data in real time;

[0106] Dynamically allocate geothermal energy based on fuzzy PID algorithm, giving priority to meeting the needs of high value-added links (such as seedling greenhouses);

[0107] Integrate machine learning models to utilize historical data, weather forecasts, and crop growth cycle characteristics to optimize the complementary strategy of geothermal and solar energy.

[0108] Recharge and energy storage module,

[0109] The cooled geothermal water is purified and then recharged into the underground aquifer to achieve resource recycling;

[0110] Phase change heat storage tanks are configured to store excess heat energy to balance diurnal and seasonal energy consumption fluctuations.

[0111] Intelligent control of agricultural greenhouses,

[0112] Build an agricultural Internet of Things node network, deploy multi-parameter environmental monitoring terminals, and realize online three-dimensional monitoring of the microclimate of facility agriculture;

[0113] Through the load forecasting engine based on the LSTM-ARIMA hybrid algorithm, the geothermal and solar energy complementarity and system operation strategy are optimized.

[0114] Hot spring utilization and tail water treatment,

[0115] Utilize part of the geothermal water after heat exchange to provide hot water for hot spring bathing;

[0116] A three-level tailwater treatment system is established to ensure that the recharge water quality meets the regulatory requirements, and tracer monitoring is used to construct a three-dimensional recharge migration model to achieve balanced production and injection.

[0117] Example 2:

[0118] The computer-readable storage medium of this embodiment stores a computer program thereon, which, when executed by a processor, implements the steps of the zero-carbon intelligent agricultural development and utilization method based on energy cascade utilization in Example 1.

[0119] The computer-readable storage medium of this embodiment may be an internal storage unit of the terminal, such as a hard disk or memory of the terminal; the computer-readable storage medium of this embodiment may also be an external storage device of the terminal, such as a plug-in hard disk, a smart memory card, a secure digital card, a flash memory card, etc. equipped on the terminal; further, the computer-readable storage medium may also include both an internal storage unit of the terminal and an external storage device.

[0120] The computer-readable storage medium of this embodiment is used to store computer programs and other programs and data required by the terminal. The computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0121] Example 3:

[0122] The computer device of this embodiment includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the zero-carbon intelligent agricultural development and utilization method based on cascaded energy utilization of Example 1 are implemented.

[0123] In this embodiment, the processor can be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The memory can include read-only memory and random access memory, and provide instructions and data to the processor. A part of the memory can also include non-volatile random access memory. For example, the memory can also store information about the device type.

[0124] Those skilled in the art will appreciate that the disclosed contents of the embodiments may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0125] The present invention is described with reference to the flowcharts and / or block diagrams of the methods and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as the combination of the processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions; these computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0126] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0127] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0128] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0129] The examples described in the present invention are merely descriptions of the preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A zero-carbon intelligent agricultural development and utilization system based on cascaded energy utilization, characterized by: It includes geothermal well selection and layout module, geothermal water collection and pretreatment module, heat exchange module, cascade utilization system construction module, hot water recycling module, working condition adjustment module, intelligent control module, hot spring utilization and reinjection system and system energy storage module; The geothermal well selection and arrangement module utilizes a geothermal well with proven reserves as an extraction well for the low-carbon agricultural geothermal energy cascade utilization demonstration project, while selecting another well as a recharge well; The geothermal water collection and pretreatment module collects geothermal water through a submersible pump and treats the water using a sand removal and filtration device and a water-to-water heat exchange device; The heat exchange module uses clean soft water and geothermal water for heat exchange; The said cascade utilization system construction module is used to set a plurality of utilization levels; The hot water recycling module is used to return the soft clean water to the soft water heat exchanger for further heat exchange with the geothermal water at 80-120°C; The working condition adjustment module is used to realize different arrangements and combinations of cascade utilization processes by setting valves according to seasonal and actual demand changes; The intelligent control module is used to build an agricultural Internet of Things node network and deploy multi-parameter environmental sensing terminals.

2. The zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization according to claim 1 is characterized by: It also includes a hot spring utilization and recharge system; the hot spring utilization and recharge system is used to transfer part of the geothermal water that has been cooled after heat exchange into the hot spring water storage tank through the hot spring transportation system; and recharge the remaining geothermal water after treatment.

3. The zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization according to claim 2 is characterized by: It also includes a system energy storage module; the system energy storage module is used to configure a cross-seasonal heat storage underground warehouse, and form a two-way heat exchange system through the buried pipe heat exchanger and the heat storage tank.

4. The zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization according to claim 1 is characterized by: The water-water heat exchange device in the geothermal water collection and pretreatment module uses a detachable plate heat exchanger with a high heat transfer coefficient.

5. The zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization according to claim 1 is characterized by: The cascade utilization system building module includes a four-tier utilization system; They are: For geothermal power generation, soft clean water at 80-120℃ enters the geothermal generator set. The three-phase AC electricity generated after power generation is rectified and used to meet the energy consumption requirements of the demonstration project system. Geothermal cooling and heating, the temperature of soft purified water drops to 70-80℃, In summer, hot water enters the generator of the geothermal refrigeration unit, which drives the absorption refrigeration system to produce chilled water for air conditioning and provide cooling for agricultural greenhouses. Winter: 70-80℃ soft purified water directly enters the greenhouse heating system; Geothermal drying: Soft clean water with a temperature of 55-70°C enters the geothermal drying room and is used for drying agricultural products, aquatic products, seafood or local specialties; Soil warming, irrigation water preheating and aquaculture, soft clean water with an outlet temperature of 40-55℃ is used for soil warming and irrigation water preheating.

6. The zero-carbon intelligent agricultural development and utilization system based on energy cascade utilization according to claim 1 is characterized by: In the intelligent control module, a thermodynamic model is established based on geothermal wellhead parameters, and a fuzzy adaptive PID controller is used to achieve a reasonable distribution of the dynamic thermal load of the cascade utilization system.

7. A zero-carbon intelligent agricultural development and utilization method based on cascaded energy utilization, characterized by: The steps include: Use geothermal wells with proven reserves as extraction wells for the low-carbon agricultural geothermal energy cascade utilization demonstration project, and select another well as a recharge well; The geothermal water is collected by a submersible pump and treated by a sand removal filter and a water-to-water heat exchange device; Use clean soft water and geothermal water for heat exchange; Set up multiple tiered utilization levels; The soft clean water is returned to the soft water heat exchanger for further heat exchange with the geothermal water at 80-120℃; According to the changes in seasons and actual demand, different arrangements and combinations of cascade utilization processes can be achieved by setting valves; Build an agricultural Internet of Things node network and deploy multi-parameter environmental sensing terminals.

8. The method according to claim 7, wherein: The method also includes: transferring part of the geothermal water cooled after heat exchange into the hot spring water storage tank through the hot spring delivery system; and recharging the remaining geothermal water after treatment; A cross-seasonal heat storage underground warehouse is configured, and a two-way heat exchange system is formed through the buried pipe heat exchanger and the heat storage tank.

9. A storage medium, characterized in that: The storage medium stores instructions, and when a computer reads the instructions, the computer executes the zero-carbon intelligent agricultural development and utilization method based on energy cascade utilization as described in any one of claims 1 to 8.

10. An electronic device, characterized in that: The device comprises a processor and the storage medium according to claim 9, wherein the processor executes instructions in the storage medium.

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