Intelligent regulation and control biogas slurry-water-NPK fertilizer mixing system and method
Through the intelligently regulated sterilization liquid-water-NPK fertilizer mixing system, the problems of plant damage during sterilization liquid application and low fertilizer utilization rate are solved, and the precise replenishment and mixing of NPK elements in the soil are achieved, thereby improving the utilization rate and environmental protection effect of sterilization liquid.
Patent Information
- Application Number
- CN202411776442.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-03-28
AI Technical Summary
When using sterilization liquid as fertilizer, the prior art can easily lead to plant leaf burning, root rot, imbalance in pH and low fertilizer utilization. When applying NPK fertilizer, the unreasonable water and fertilizer ratio will lead to fertilizer waste and environmental pollution.
The intelligently regulated worm liquid-water-NPK fertilizer mixing system is adopted, and precise control and mixing of worm liquid, water and NPK fertilizer through components such as material barrels, water pumps, flowmeters, control valves, mixing devices, soil comprehensive sensors and element content sensors, combined with programmable logic controllers and display modules, to achieve precise control and mixing of worm liquid, water and NPK fertilizers.
It achieves sufficient supplementation and precise mixing of NPK elements in the soil, improves the utilization rate of the sterilization liquid, reduces the probability of seedling burning and nutrient loss, and ensures balanced supply of fertilizers and environmental protection.
Smart Images
Figure CN119701694A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of agricultural waste resource utilization, and in particular to a system and method for intelligently regulating a mixing system of biogas slurry-water-NPK fertilizer. Background Art
[0002] At present, there are a large number of biogas fields in my country. These biogas fields produce a large amount of biogas slurry while producing biogas. It is estimated that the amount of biogas slurry produced in my country exceeds 1 billion tons per year. Biogas slurry is a high-quality organic fertilizer produced by anaerobic fermentation. It contains a variety of nutrients that promote plant growth, growth hormones and rich amino acids. Returning biogas slurry to farmland is one of the main ways to use biogas slurry. By applying biogas slurry to farmland, soil fertility can be improved, soil structure can be improved, the use of chemical fertilizers can be reduced, and the sustainable development of agriculture can be promoted. However, biogas slurry contains a high level of organic matter and bioactive ingredients. Direct use can easily cause problems such as leaf burning, root rot, pH imbalance, and reduced fertilizer utilization. Therefore, in order to ensure the safety and effectiveness of biogas slurry use, it is generally recommended to mix it with water before application.
[0003] N, P, and K are the three essential nutrients for plant growth, responsible for promoting leaf growth, helping root development and flowering and fruiting, and enhancing plant resistance. Liquid fertilizers usually need to be diluted with water before application. When the soil is extremely dry or nutrients need to be replenished quickly, solid fertilizers can be dissolved in water and applied to improve fertilization efficiency. An unreasonable water-fertilizer ratio will lead to fertilizer waste, environmental pollution, and an imbalance in nutrient structure. Therefore, when using NPK fertilizers, they should be proportioned and applied in strict accordance with the fertilizer instructions and crop requirements to ensure that plants can obtain a balanced supply of nutrients. Summary of the invention
[0004] The purpose of the present invention is to provide a system and method for intelligently regulating the mixing of biogas slurry-water-NPK fertilizer, which can fully supplement the quality and concentration of NPK required by the soil, maximize the utilization of biogas slurry, and accurately control the amounts of biogas slurry, water, and NPK fertilizer to ensure accurate mixing of biogas slurry-water-NPK fertilizer, improve the utilization rate of biogas slurry, and reduce the probability of seedling burning and nutrient loss.
[0005] In order to achieve the above-mentioned object, the technical scheme adopted by the present invention is: an intelligent control biogas slurry-water-NPK fertilizer mixing system, comprising a material barrel, a water pump placed in a biogas slurry tank, a clean water pipe outlet, a liquid nitrogen fertilizer storage bin, a liquid phosphate fertilizer storage bin, and a liquid potash fertilizer storage bin, wherein the material barrel is connected to the water pump, the clean water pipe outlet, the liquid nitrogen fertilizer storage bin, the liquid phosphate fertilizer storage bin, the liquid potash fertilizer storage bin, and the irrigation system through pipelines, and a stirring device is also provided in the material barrel; Flow meters and control valves are respectively provided on the pipelines between the material barrel and the water pump, the clean water outlet, the liquid nitrogen fertilizer storage bin, the liquid phosphate fertilizer storage bin, and the liquid potash fertilizer storage bin; It also includes a soil comprehensive sensor installed at the soil to be fertilized and an element content sensor installed at the biogas tank, liquid nitrogen fertilizer storage bin, liquid phosphate fertilizer storage bin, and liquid potash fertilizer storage bin; It also includes a programmable logic controller and a display module, and the programmable logic controller is electrically connected to each electrical component.
[0006] Preferably, a self-cleaning filter is also provided between the material barrel and the water pump.
[0007] Preferably, the stirring device comprises a driving motor, a stirring shaft and fan blades.
[0008] Preferably, the display module includes a display screen. A method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer comprises the following steps: Step 1: The soil comprehensive sensor detects the N, P, and K content of the soil to be fertilized and the relative humidity of the soil in real time; each element content sensor detects the N, P, and K content in the biogas slurry, liquid nitrogen fertilizer, liquid phosphate fertilizer, and liquid potassium fertilizer; each sensor transmits the detected data to the programmable logic controller; Step 2: Input the bulk density of the fertilized soil, the area of the land, the field water holding capacity, the suitable water content, and the root depth data into the programmable logic controller through the display module; Step 3, the programmable logic controller calculates the mass of N, P and K elements required for fertilizing the soil according to the data obtained in steps 1 and 2; Step 4, the programmable logic controller calculates the volume of biogas slurry required to supplement the mass of N, P and K elements in the soil according to the mass of N, P and K elements required for fertilization obtained in step 3, and determines the volume of biogas slurry required to supplement one element in the soil according to the minimum amount of biogas slurry; Step 5, the programmable logic controller calculates the volume of liquid fertilizers of the other two elements and the required volume of clean water according to the required volume of biogas slurry determined in step 4; Step 6, each fluid sensor transmits the measured flow rate of each liquid to the programmable logic controller, and the programmable logic controller obtains the time taken for each liquid to flow in according to the required volume of biogas slurry, the volume of clean water, and the volume of each liquid fertilizer; Step 7, the programmable logic controller controls each control valve to close at a fixed time; Step 8: After all control valves are closed, the programmable logic controller controls the stirring device to stir the biogas slurry, clean water and NPK fertilizer and output them to the irrigation system.
[0009] Preferably, in step 3, the programmable logic controller obtains the following calculation formulas for the masses M1, M2, and M3 of the required N, P, and K elements: M1=Shρ(A-A3) (1) M2=Shρ(B-B3) (2) M3=Shρ(C-C3) (3) Among them, A, B, C are the target N, P, and K element contents of the soil, A3, B3, and C3 are the soil N, P, and K element contents measured by the soil integrated sensor, ρ is the soil bulk density, S is the area of the land, and h is the root depth.
[0010] Preferably, the calculation formulas for the volumes L1, L2, and L3 of biogas slurry required to replenish the N, P, and K elements in the soil in step 4 are as follows: Among them, A1, B1, and C1 are the contents of N, P, and K elements in the biogas slurry; Compare L1, L2, and L3 by using the minimum amount of biogas slurry to complete one element in the soil. If L1 is the smallest, the volume V1 of the biogas slurry is L1: V1=min(L1,L2,L3)=L1 (7).
[0011] Preferably, in step 5, the other two elements are supplemented with liquid fertilizers, and the volumes of phosphorus fertilizer and potassium fertilizer required are V3 and V4: Among them, A2, B2, and C2 are the N, P, and K element contents of the fertilizer. The volume of clean water required V2: V2=(ω-rθ)S (10) ω is the suitable water content, r is the relative soil humidity, θ is the field water holding capacity, and S is the area of the land.
[0012] Preferably, in step 6, the programmable logic controller obtains the following calculation formula for the time taken for each liquid to flow in: Time required for biogas slurry to flow into the material barrel T1: Time required for clean water to flow into the material barrel T2: The time required for liquid fertilizer to flow into the material barrel is T3 and T4:
[0013] The beneficial effects of the present invention are:
[0014] This solution maximizes the use of biogas slurry on the basis of being able to fully supplement the quality and concentration of NPK required by the soil, and accurately controls the amount of biogas slurry, water, and NPK fertilizer to ensure accurate mixing of biogas slurry-water-NPK fertilizer, thereby improving the utilization rate of biogas slurry and reducing the probability of seedling burning and nutrient loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is an overall schematic diagram of the present invention.
[0017] In the figure, 1. a first flow meter, 2. a second flow meter, 3. a third flow meter, 4. a fourth flow meter, 5. a fifth flow meter, 6. a programmable logic controller, 7. a display module, 8. a first fluid control valve, 9. a second fluid control valve, 10. a third fluid control valve, 11. a fourth fluid control valve, 12. a fifth fluid control valve, 13. a self-cleaning filter, 14. a stirring device, 15. a water pump, 16. a material barrel, 17. a liquid nitrogen fertilizer storage bin, 18. a liquid phosphate fertilizer storage bin, and 19. a liquid potash fertilizer storage bin. DETAILED DESCRIPTION
[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0020] At the same time, it should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be the ordinary meaning understood by people with ordinary skills in the technical field to which the present invention belongs. The meaning of "multiple" used in the patent application specification and claims of the present invention is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front end", "rear end", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.
[0021] The present invention is further described in detail below in conjunction with embodiments and with reference to the accompanying drawings.
[0022] The present invention discloses an intelligent control system for mixing biogas slurry-water-NPK fertilizer. Figure 1 As shown, the embodiment includes a material barrel 16, a water pump 15 placed in the biogas tank, a clean water pipe outlet, a liquid nitrogen fertilizer storage bin 17, a liquid phosphate fertilizer storage bin 18, and a liquid potassium fertilizer storage bin 19. The material barrel 16 is connected to the water pump 15, the clean water pipe outlet, the liquid nitrogen fertilizer storage bin 17, the liquid phosphate fertilizer storage bin 18, the liquid potassium fertilizer storage bin 19 and the irrigation system through pipelines, and a stirring device 14 is also provided in the material barrel 16.
[0023] Flow meters and control valves are respectively provided on the pipelines between the material barrel 16 and the water pump 15, the clean water pipe outlet, the liquid nitrogen fertilizer storage bin 17, the liquid phosphate fertilizer storage bin 18, and the liquid potassium fertilizer storage bin 19, namely, the first flow meter 1, the second flow meter 2, the third flow meter 3, the fourth flow meter 4, the fifth flow meter 5 and the first fluid control valve 8, the second fluid control valve 9, the third fluid control valve 10, the fourth fluid control valve 11, and the fifth fluid control valve 12.
[0024] The mixing system also includes a soil comprehensive sensor arranged at the soil to be fertilized and element content sensors arranged in the biogas tank, liquid nitrogen fertilizer storage bin 17, liquid phosphate fertilizer storage bin 18, and liquid potassium fertilizer storage bin 19. The soil comprehensive sensor is used to detect the N, P, and K element content of the soil and the relative humidity of the soil, and the element content sensors arranged in the biogas tank, liquid nitrogen fertilizer storage bin 17, liquid phosphate fertilizer storage bin 18, and liquid potassium fertilizer storage bin 19 are used to detect the N, P, and K element content in the biogas, liquid nitrogen fertilizer, liquid phosphate fertilizer, and liquid potassium fertilizer.
[0025] The mixing system further includes a programmable logic controller 6 and a display module 7, wherein the programmable logic controller 6 is electrically connected to each electrical component. A self-cleaning filter 13 is also provided between the material barrel 16 and the water pump 15. The stirring device 14 includes a driving motor, a stirring shaft and a fan blade. The display module 7 includes a display screen.
[0026] A method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer comprises the following steps: Step 1, the soil comprehensive sensor detects the N, P, K content of the soil to be fertilized and the relative humidity of the soil in real time, and the element content sensors detect the N, P, K content in the biogas slurry, liquid nitrogen fertilizer, liquid phosphate fertilizer, and liquid potassium fertilizer, and each sensor transmits the detected data to the programmable logic controller 6; Step 2: inputting the bulk density of the fertilized soil, the area of the land, the field water holding capacity, the suitable water content, and the root depth data to the programmable logic controller 6 through the display module 7; Step 3, the programmable logic controller 6 calculates the mass of N, P and K elements required for fertilizing the soil according to the data obtained in steps 1 and 2; Step 4, the programmable logic controller 6 calculates the volume of biogas slurry required to supplement the mass of N, P and K elements in the soil according to the mass of N, P and K elements required for fertilization obtained in step 3, and determines the volume of biogas slurry required to supplement one element in the soil according to the minimum amount of biogas slurry; Step 5, the programmable logic controller 6 calculates the volume of liquid fertilizers of the other two elements and the required volume of clean water according to the required volume of biogas slurry determined in step 4; Step 6, each fluid sensor transmits the measured flow rate of each liquid to the programmable logic controller 6, and the programmable logic controller 6 obtains the time taken for each liquid to flow in according to the required volume of biogas slurry, the volume of clean water, and the volume of each liquid fertilizer; Step 7, the programmable logic controller 6 controls each control valve to close at a fixed time; Step 8: After all control valves are closed, the programmable logic controller 6 controls the stirring device 14 to work, stir the biogas slurry, clean water and NPK fertilizer and output them to the irrigation system.
[0027] In step 3, the programmable logic controller 6 obtains the following calculation formulas for the masses M1, M2, and M3 of the required N, P, and K elements: M1=Shρ(A-A3) (1) M2=Shρ(B-B3) (2) M3=Shρ(C-C3) (3) Among them, A, B, C are the target N, P, and K element contents of the soil, A3, B3, and C3 are the soil N, P, and K element contents measured by the soil integrated sensor, ρ is the soil bulk density, S is the area of the land, and h is the root depth.
[0028] The calculation formulas for the volumes L1, L2, and L3 of biogas slurry required to supplement the N, P, and K elements in the soil in step 4 are as follows: Among them, A1, B1, and C1 are the contents of N, P, and K elements in the biogas slurry; Compare L1, L2, and L3 by using the minimum amount of biogas slurry to complete one element in the soil. If L1 is the smallest, the volume V1 of the biogas slurry is L1: V1=min(L1,L2,L3)=L1 (7).
[0029] In step 5, liquid fertilizer is used to supplement the other two elements, and the volumes of phosphorus fertilizer and potassium fertilizer required are V3 and V4: Among them, A2, B2, and C2 are the N, P, and K element contents of the fertilizer. The volume of clean water required V2: V2=(ω-rθ)S (10) ω is the suitable water content, r is the relative soil humidity, θ is the field water holding capacity, and S is the area of the land.
[0030] In step 6, the programmable logic controller 6 obtains the following calculation formula for the time taken for each liquid to flow in: Time T1 required for the biogas slurry to flow into the material barrel 16: Time T2 required for clean water to flow into the material barrel 16: The time T3 and T4 required for the liquid fertilizer to flow into the material barrel 16:
[0031] It should be noted that the parts not described in detail in the above embodiments are all prior art.
[0032] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can invent the content of the technical solution without departing from the scope of the technical solution of the present invention. Any simple modification, equivalent change made to the above embodiment according to the technical essence of the present invention and any slight change or modification to an equivalent embodiment of equivalent change made by using the technical content disclosed above, as long as it does not depart from this modification, should be covered within the protection scope of the present invention.
Claims
1. An intelligent control system for mixing biogas slurry-water-NPK fertilizer, characterized by: The invention comprises a material barrel (16), a water pump (15) placed in a biogas slurry tank, a clean water pipe outlet, a liquid nitrogen fertilizer storage bin (17), a liquid phosphate fertilizer storage bin (18), and a liquid potash fertilizer storage bin (19); the material barrel (16) is connected to the water pump (15), the clean water pipe outlet, the liquid nitrogen fertilizer storage bin (17), the liquid phosphate fertilizer storage bin (18), the liquid potash fertilizer storage bin (19), and an irrigation system through pipelines, and a stirring device (14) is also provided in the material barrel (16); Flow meters and control valves are respectively provided on the pipelines between the material barrel (16) and the water pump (15), the clean water pipe outlet, the liquid nitrogen fertilizer storage bin (17), the liquid phosphate fertilizer storage bin (18), and the liquid potash fertilizer storage bin (19); It also includes a soil comprehensive sensor arranged at the soil to be fertilized, and element content sensors arranged at the biogas tank, the liquid nitrogen fertilizer storage bin (17), the liquid phosphate fertilizer storage bin (18), and the liquid potash fertilizer storage bin (19); It also includes a programmable logic controller (6) and a display module (7), wherein the programmable logic controller (6) is electrically connected to each electrical component.
2. The intelligent control system of biogas slurry-water-NPK fertilizer mixing according to claim 1, characterized in that: A self-cleaning filter (13) is also provided between the material barrel (16) and the water pump (15).
3. The intelligent control system of biogas slurry-water-NPK fertilizer mixing according to claim 1, characterized in that: The stirring device (14) comprises a driving motor, a stirring shaft and fan blades.
4. The intelligent control system of biogas slurry-water-NPK fertilizer mixing according to claim 1, characterized in that: The display module (7) comprises a display screen.
5. A method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer, the mixing method being applied to the mixing system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1, the soil comprehensive sensor detects the N, P, K content of the soil to be fertilized and the soil relative humidity in real time, and the element content sensors detect the N, P, K content in the biogas slurry, liquid nitrogen fertilizer, liquid phosphate fertilizer, and liquid potassium fertilizer, and each sensor transmits the detected data to the programmable logic controller (6); Step 2: inputting the bulk density of the fertilized soil, the area of the land, the field water holding capacity, the suitable water content, and the root depth data into the programmable logic controller (6) through the display module (7); Step 3, the programmable logic controller (6) calculates the mass of N, P and K elements required for fertilizing the soil according to the data obtained in steps 1 and 2; Step 4, the programmable logic controller (6) calculates the volume of biogas slurry required to supplement the mass of N, P and K elements in the soil according to the mass of N, P and K elements required for fertilization obtained in step 3, and determines the volume of biogas slurry required to supplement one element in the soil according to the minimum amount of biogas slurry; Step 5, the programmable logic controller (6) calculates the volume of liquid fertilizer of the other two elements and the required volume of clean water according to the required volume of biogas slurry determined in step 4; Step 6, each fluid sensor transmits the measured flow rate of each liquid to the programmable logic controller (6), and the programmable logic controller (6) obtains the time taken for each liquid to flow in according to the required volume of biogas slurry, the volume of clean water, and the volume of each liquid fertilizer; Step 7, the programmable logic controller (6) controls each control valve to close at a fixed time; Step 8: After all control valves are closed, the programmable logic controller (6) controls the stirring device (14) to work, stir the biogas slurry, clean water and NPK fertilizer and output them to the irrigation system.
6. The method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer according to claim 5, characterized in that: In step 3, the programmable logic controller (6) obtains the following calculation formulas for the masses M1, M2, and M3 of the required N, P, and K elements: M1=Shρ(A-A3) (1) M2=Shρ(B-B3) (2) M3=Shρ(C-C3) (3) Among them, A, B, C are the target N, P, and K element contents of the soil, A3, B3, and C3 are the soil N, P, and K element contents measured by the soil integrated sensor, ρ is the soil bulk density, S is the area of the land, and h is the root depth.
7. The method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer according to claim 6, characterized in that: The calculation formulas for the volumes L1, L2, and L3 of biogas slurry required to supplement the N, P, and K elements in the soil in step 4 are as follows: Among them, A1, B1, and C1 are the contents of N, P, and K elements in the biogas slurry; Compare L1, L2, and L3 by using the minimum amount of biogas slurry to complete one element in the soil. If L1 is the smallest, the volume V1 of the biogas slurry is L1: V1=min(L1,L2,L3)=L1 (7).
8. The method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer according to claim 7, characterized in that: In step 5, liquid fertilizer is used to supplement the other two elements, and the volumes of phosphorus fertilizer and potassium fertilizer required are V3 and V4: Among them, A2, B2, and C2 are the N, P, and K element contents of the fertilizer. The volume of clean water required V2: V2=(ω-rθ)S (10) ω is the suitable water content, r is the relative soil humidity, θ is the field water holding capacity, and S is the area of the land.
9. The method for intelligently controlling the mixing of biogas slurry-water-NPK fertilizer according to claim 8, characterized in that: In step 6, the programmable logic controller (6) obtains the following calculation formula for the time taken for each liquid to flow in: The time T1 required for the biogas slurry to flow into the material barrel (16): Time T2 required for clean water to flow into the material barrel (16): The time T3 and T4 required for the liquid fertilizer to flow into the material barrel (16):