Continuous Fertigation System with pH Control 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 distribution of water and nutrients, and conventional fertigation methods result in unbalanced nutrient availability and high costs due to the use of commercial fertilizers with nutrient-extraneous materials.
Innovation Solution
A method and system for continuous fertigation using a potassium-nutrient feedstock composed of potassium hydroxide and a mineral acid, such as sulfuric acid, which is automatically fed into the irrigation system at low levels throughout the crop cycle, providing a high-dilution environment to minimize plugging and nutrient imbalances, and allowing for on-site formulation of fertilizers with reduced extraneous materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If micro-irrigation systems are used to deliver precise amounts of water directly to the soil, then water conservation and precise delivery are improved, but the system becomes highly sensitive to water quality and fertilizer additives, causing plugging and fouling
Solution Approach 1:
The patent changes the chemical parameters of the irrigation water by adding pH adjusters (acids or bases) and solubility modifiers to prevent precipitation of fertilizer salts. This maintains the micro-irrigation system's precise delivery capability while preventing plugging by keeping all additives in soluble form throughout the irrigation cycle.
Solution Approach 2:
The patent introduces chemical intermediaries (pH adjusters, chelating agents, and solubility modifiers) that mediate between the fertilizer additives and the micro-irrigation system. These intermediaries prevent direct harmful interactions between fertilizer salts and the micro-emitter components, eliminating plugging while preserving precise water delivery.
2Quantity of substance
If conventional commercial fertilizers are used in fertigation, then nutrient delivery is achieved, but nutrient-extraneous materials cause unbalanced nutrient availability and high costs
Solution Approach 1:
The patent extracts only the essential nutrient components from conventional fertilizer formulations by using separate injection systems for each nutrient (nitrogen, phosphorus, potassium, etc.). This eliminates nutrient-extraneous materials while maintaining balanced nutrient delivery, allowing precise control of each nutrient's concentration and timing.
Solution Approach 2:
The patent segments the fertilizer delivery system into separate injection points and lines for different nutrients. This allows independent control and optimization of each nutrient's delivery, eliminating the need for pre-mixed commercial fertilizers that contain extraneous materials, and enabling balanced nutrient availability throughout the crop cycle.
3Ease of operation
If fertilizers are added to irrigation water, then labor expenditure is reduced, but plugging and fouling of micro-components occur due to insoluble salt formation
Solution Approach 1:
The patent changes the chemical parameters (pH, ionic strength, solubility) of the irrigation water through automated injection of pH adjusters and solubility modifiers. This maintains the ease of automated fertilizer application while preventing plugging by ensuring all added materials remain in soluble form throughout the system.
Solution Approach 2:
The patent introduces chemical intermediaries (pH adjusters, dispersants, and solubility enhancers) that act as mediators between the fertilizer additives and the irrigation water. These intermediaries prevent the formation of insoluble salts and particulates that cause plugging, while maintaining the automated low-labor application method.
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 ensures uniform nutrient availability, reduces the risk of plugging, and significantly lowers costs by using basic commodity raw materials, maintaining optimal potassium levels for crop growth without excessive fertilizer application, thus enhancing crop yields while minimizing environmental impact.
Implementation Method 1
The feedstock is comprised of potassium hydroxide and at least one mineral acid that intermix as the feedstock is charged to the irrigation system
Implementation Method 2
The plurality of feedstock raw materials generate an exotherm upon intermixing with each other and with the irrigation water
Implementation Method 3
the feedstock is charged to the irrigation system only when the irrigation system is active and irrigation water is sufficiently flowing through the irrigation system to dampen the exotherm
Implementation Method 4
The pre-filter main-line pressure sensor determines whether the irrigation system pressure is above a pre-determined maximum safe pressure
Implementation Method 5
The main-line flow sensor determines whether the irrigation water is flowing through the main line at a rate that is above a pre-determined minimum mixing rate
Implementation Method 6
If the pre-filter main-line pressure sensor determines that the irrigation system pressure is below the pre-determined maximum safe pressure, the controller activates the feed pump to deliver the feedstock into the irrigation system
Data Source
AI summary
An agricultural fertigation method includes the continuous introduction of concentrated raw materials into a high-dilution irrigation-water environment whereby the stream of flowing irrigation water dampens the resultant dissolution and reaction exotherms. A system wherein raw materials are efficiently continuously fed to the irrigation system main line or a side-arm reactor efficiently implements the method.