Granular Material Dressing via Centripetal Flow and Mist Atomization
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Solution Overview
Problem
Existing seed dressing machines face challenges in preventing agglomeration of dressed granular materials, especially in damp environments, and often result in environmental contamination due to open air dispersion methods.
Innovation Solution
A vertical apparatus with alternating centrifugal and centripetal flow guides, a motor-driven fan, and a dispersing screen with small openings for closed air circulation, ensuring uniform dressing and preventing grain sticking through controlled air-saturated mist application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If open air dispersion methods are used for dressing granular materials, then dressing coverage is improved, but environmental contamination increases
Solution Approach 1:
A liquid suspension serves as an intermediary medium to transfer the dressing agent from the spray nozzle to the granular material. The suspension is atomized into fine droplets that uniformly coat the material surfaces, achieving complete coverage while containing the dressing agent within the closed chamber to prevent environmental contamination.
Solution Approach 2:
The dressing process is conducted in a closed chamber that creates a controlled environment. The liquid suspension mist acts as a contained atmosphere within the chamber, allowing complete dressing coverage while preventing the dressing agent from escaping into the external environment, thus eliminating environmental contamination.
2Manufacturing precision
If liquid dressing agent is applied to grained material, then dressing effectiveness is improved, but agglomeration of material occurs
Solution Approach 1:
The liquid dressing agent is transformed into a fine mist suspension through atomization, fundamentally changing its physical state from liquid to aerosol. This parameter change allows the dressing to be applied as extremely fine droplets that coat material surfaces uniformly without causing aggregation, maintaining material stability while achieving effective dressing coverage.
Solution Approach 2:
The liquid suspension is segmented into numerous fine droplets through the spray nozzle atomization process. This segmentation transforms a single liquid stream into thousands of micro-droplets that independently coat different material surfaces, preventing the liquid from bridging and agglomerating granular particles while ensuring comprehensive dressing coverage.
3Productivity
If high throughput dressing is implemented, then productivity is improved, but uniform coating of all surfaces including hard-to-reach areas becomes difficult
Solution Approach 1:
A liquid suspension spray system using pneumatic atomization is employed to dress the granular material. The suspension is forced through a spray nozzle at high pressure, creating a fine mist that is carried by air flow throughout the chamber. This pneumatic delivery system ensures uniform distribution of dressing agent to all material surfaces including hard-to-reach areas while maintaining high processing throughput.
Solution Approach 2:
The dressing agent is transformed from liquid form into a three-dimensional aerosol mist suspension that can penetrate and reach all surfaces of the granular material from multiple angles. This dimensional transformation allows the fine droplets to access hard-to-reach areas and crevices that would be inaccessible to liquid spray, ensuring uniform coating while maintaining high throughput processing capability.
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
The apparatus achieves efficient dressing of granular materials with high throughput (>6000 kg/hour) while minimizing environmental pollution by ensuring all surfaces, including hard-to-reach areas, are uniformly coated, and prevents agglomeration through controlled air circulation and mist formation.
Implementation Method 1
closed air circulation
Implementation Method 2
dispersing screen having small openings which constitutes a cover of a chamber arranged axially below the nozzle
Implementation Method 3
modules having a centrifugal flow guide in a form of an axial support and plurality of directing elements
Implementation Method 4
modules having a centripetal flow guide in a form of plurality of directing vanes positioned on an inner wall of the module
Data Source
AI summary
In an apparatus below an uppermost module 7 having a centrifugal flow guide there is an axially positioned nozzle 17 supplying a dressing agent, directed onto a dispersing screen 20 which constitutes a cover of a chamber 19 arranged axially below the nozzle 17 and connected with an external blower 21, whereas above the nozzle 17 on the vertical axis of the body 1 there is positioned a shield 16, whereas below the chamber 19 there is arranged a module 10 having a centripetal flow guide, below which there is positioned another module 7 having a centrifugal flow guide, and the lower end of the body 1 is constituted by a module 10 having a centripetal flow guide.