Continuous Fertigation System for Micro-Irrigation Plugging
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Solution Overview
Problem
Micro-irrigation systems are prone to plugging due to the sensitivity to water quality and the inclusion of fertilizers, leading to uneven nutrient distribution and potential system shutdowns, as they are intolerant to high levels of inorganic salts and particulate formation caused by fertilizer additions.
Innovation Solution
A method and system for continuous, low-level fertigation using a nitrogen-nutrient feedstock composed of raw materials like nitric acid, urea, calcium nitrate, magnesium nitrate, and ammonium hydroxide, which are automatically mixed and fed into the irrigation system, creating a high-dilution environment to minimize plugging and optimize nutrient availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fertilizers are added to micro-irrigation systems, then nutrient delivery to crops is improved, but plugging and fouling of micro-components occur due to high inorganic salt levels and particulate formation
Solution Approach 1:
The patent changes the concentration parameter by using highly diluted fertilizer solutions (e.g., 0.1x to 10x dilution of conventional concentrations). This parameter change allows fertilizer nutrients to be delivered without exceeding the solubility thresholds that cause particulate formation and plugging in micro-irrigation systems
Solution Approach 2:
The system dynamically adjusts fertilizer application rates based on real-time monitoring of water quality parameters and crop needs. The controller modulates the fertilizer dosing to maintain concentrations below plugging thresholds while ensuring adequate nutrient delivery, transforming a static high-concentration application into a dynamic low-concentration continuous application
2Productivity
If conventional fertigation methods are used, then labor costs are reduced, but uneven nutrient distribution and system shutdowns occur due to plugging
Solution Approach 1:
The patent implements continuous fertigation where diluted fertilizer solutions are applied continuously or near-continuously through the micro-irrigation system. This continuous low-level application replaces intermittent high-concentration applications, maintaining system reliability by preventing salt accumulation and particulate formation while ensuring uniform nutrient distribution
Solution Approach 2:
The patent introduces highly diluted fertilizer solutions as an intermediary form between conventional fertilizers and plant uptake. This intermediary concentration level (e.g., 0.1x to 10x dilution) acts as a buffer that prevents direct plugging of micro-components while still delivering adequate nutrients, mediated by the irrigation water
3Manufacturing precision
If micro-irrigation systems use refined micro-components for precise water delivery, then water precision is improved, but sensitivity to water quality and fertilizer additives increases causing plugging
Solution Approach 1:
The patent changes the concentration parameter of fertilizer solutions to extremely low levels (high dilution factors such as 0.1x to 10x of conventional concentrations). This parameter change ensures that the refined micro-components remain sensitive enough for precise water delivery while the low fertilizer concentrations prevent exceeding solubility thresholds that cause plugging
Solution Approach 2:
The system applies fertilizer at partial concentrations (diluted forms) rather than full strength. This partial action approach delivers sufficient nutrients for crop needs while keeping concentrations below the threshold for harmful precipitate formation, allowing the refined micro-components to function without fouling
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces labor costs, minimizes undesirable components, and ensures uniform nutrient delivery throughout the crop cycle, preventing plugging and maintaining consistent fertilizer availability, thus enhancing crop growth while reducing equipment and labor costs.
Implementation Method 1
a high-dilution environment in the feedstock-component intermixing zone
Implementation Method 2
the constituents of which intermix as the feedstock is charged to the irrigation system
Data Source
AI summary
An agricultural fertigation method includes the continuous in situ manufacture of one or more nitrogen-nutrient raw fertilizers within the irrigation system upstream of the agricultural field being irrigated for a prolonged term. Raw materials, namely nitric acid, urea, ammonium hydroxide, calcium nitrate and/or magnesium nitrate, are intermixed with each other and/or with the stream of the flowing irrigation water. The stream of flowing irrigation water dampens the resultant dissolution exotherm. A system wherein raw materials are efficiently continuously fed to the irrigation system main line or a side-arm reactor efficiently implements the method.