Fertilizer Coating Method Using Stationary Frame and Movable Elements
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Solution Overview
Problem
Existing methods for coating fertilizer particles are costly and inefficient, often resulting in clumping and requiring extensive processing time, making them unsuitable for broad-acre agricultural crops like corn, where low costs are essential.
Innovation Solution
A method involving a coating unit with stationary and movable elements, where fertilizer particles are kept in motion during the application and curing of a water-insoluble polymer coating, allowing for rapid and efficient coating without agglomeration, using a chemical reaction to harden the coating while maintaining high throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional coating methods are used for fertilizer particles, then coating can be applied to achieve controlled release, but processing time increases and equipment size becomes large
Solution Approach 1:
The patent combines the coating application and curing processes into a single integrated step within one reactor. The coating material is applied to fertilizer particles and cured in the same equipment, eliminating the need for separate coating and curing reactors, thereby reducing processing time and equipment requirements while maintaining controlled release functionality
Solution Approach 2:
The reactor is designed to perform multiple functions: it serves as both the mixing vessel, the coating application chamber, and the curing reactor. This multi-functional design eliminates the need for separate dedicated equipment for each process step, reducing overall processing time and capital investment
2Reliability
If traditional coating methods are used for fertilizer particles, then coating can be applied, but equipment size increases leading to high capital and operational costs
Solution Approach 1:
The patent merges multiple process functions into a single reactor system. The same equipment that mixes the fertilizer particles also applies the coating material and facilitates the curing process. This consolidation reduces the number of equipment pieces needed, decreasing both capital investment and operational complexity while ensuring reliable coating application
Solution Approach 2:
The coating material is applied in segmented portions rather than all at once. The coating material is added in controlled amounts during the mixing process, allowing the reactor to handle smaller loads more efficiently and reducing the overall equipment size required compared to applying all coating material simultaneously
3Reliability
If batch processing is used for coating fertilizer, then coating can be applied, but clumps or balls of coated materials are generated
Solution Approach 1:
The patent employs dynamic mixing conditions during the coating process. The reactor maintains continuous motion and agitation while the coating material is applied and cured, preventing static clumping. This dynamic approach ensures uniform distribution of coating material on individual particles while maintaining overall particle stability and preventing agglomeration
Solution Approach 2:
The coating material is pre-mixed with the fertilizer particles before the curing step begins. This preliminary mixing ensures that the coating material is uniformly distributed throughout the particle batch before curing, preventing clump formation during the subsequent curing process and ensuring homogeneous coated particles
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 method enables the production of coated fertilizer particles with controlled release properties, reducing costs and processing time, and preventing clumping, making it suitable for broad-acre crops by ensuring efficient and homogeneous coating.
Implementation Method 1
the curing or hardening involves a chemical reaction of said one or more coating components
Implementation Method 2
the method comprises moving said at least two movable elements with respect to the frame during at least step b)
Data Source
Figure 1~2
Figure 3
AI summary
Disclosed is a method of coating fertilizer particles with a coating, the method comprising providing fertilizer particles in a coating unit, one or more steps of applying a coating layer by applying one or more coating components to the fertilizer particles in the coating unit, and at least, partially curing or hardening the coating layer, wherein said curing or hardening involves a chemical reaction of said one or more coating components, discharging the coated fertilizer particles from the coating unit, optionally after a final cure or hardening step, wherein the coating unit comprises a stationary frame and at least two movable elements.