Rotary Disk Grooves for Uniform Slurry Atomization
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Solution Overview
Problem
Conventional atomizers with pin type rotary disks face issues of non-uniform slurry distribution and particle size due to centrifugal spraying, leading to clogging and inconsistent particle size distribution in spray-drying processes.
Innovation Solution
The method involves a rotary disk with annular inclined surfaces and grooves on its upper surface, coated with a water repellent ICF, to ensure uniform slurry distribution and controlled particle size by adjusting the linear velocity and nozzle diameter, preventing clogging and achieving sharp particle size distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a pin type rotary disk is used for centrifugal spraying, then the slurry can be sprayed from various points, but the slurry does not spread uniformly and droplet size becomes non-uniform
Solution Approach 1:
The rotary disk is divided into multiple radial grooves that segment the slurry flow into distinct channels. Each groove acts as an independent spray zone, ensuring uniform slurry distribution and consistent droplet size. The segmentation prevents slurry from accumulating or spreading irregularly across the disk surface.
Solution Approach 2:
The groove structure creates localized spray zones with controlled geometry. Each groove has specific dimensions and angles optimized for uniform slurry flow and droplet formation. This local quality control ensures that slurry sprayed from different positions on the disk maintains consistent characteristics.
2Productivity
If the rotary disk operates at high rotation speed, then spraying efficiency increases, but slurry fixes to the disk surface causing clogging
Solution Approach 1:
The groove structure dynamically adapts to rotation speed changes. At high rotation speeds, the centrifugal force effectively pushes slurry along the grooves and promotes uniform spraying. The dynamic design allows the system to maintain reliable operation across a range of speeds without clogging.
Solution Approach 2:
The groove design extracts and channels the slurry flow in a controlled manner, preventing it from fixing to the disk surface. By guiding the slurry through defined pathways, the system eliminates the clogging issue that would otherwise occur at high rotation speeds.
3Area of stationary object
If slurry is centrifugally sprayed from edge part of the lower board, then spraying coverage increases, but some slurry fixes to side surface and does not spray
Solution Approach 1:
The grooves are designed with specific radial and angular orientations that utilize both radial and tangential dimensions. This dimensional approach directs slurry along the groove paths to the optimal spray positions, ensuring complete utilization of the disk surface area without material loss to unintended surfaces.
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 stabilizes the amount and size of particles produced, preventing clogging and ensuring continuous operation with improved yield and particle size uniformity, even at high rotation speeds.
Implementation Method 1
The slurry moves to the outer circumference of the surface of the lower board by centrifugal force due to rotation of the rotary disk
Implementation Method 2
the lower board, and the plurality of pins, are coated with a water repellent
Data Source
Figure 1
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Figure 3
AI summary
A nozzle part dropping a slurry and a rotary disk centrifugally spraying the slurry to be dropped from the nozzle part are included. The rotary disk includes a plurality of grooves stretching in a radiation direction at least in a periphery part of a surface on which the slurry is sprayed.