Rotary Disk Particle Production Apparatus Narrow Size Distribution
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Solution Overview
Problem
Conventional particle production apparatuses, such as centrifugal spray dryers, face challenges in producing particles with a consistent intended particle size and narrow particle size distribution due to material popping and turbulent air flows, leading to variations in particle size and difficulty in removing deformed substances.
Innovation Solution
A particle production apparatus featuring a rotary disk with a cylindrical portion and a material supply system that includes an annular slit material supply port and gas supply port, where the gas directs the material to contact the cylindrical surface, preventing popping and turbulent flows, and a convex portion guides the material to flow uniformly, ensuring a controlled energy input to achieve a narrow particle size distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional centrifugal spray dryer is used, then particle production is achieved, but particle size variation is large and narrow particle size distribution cannot be obtained
Solution Approach 1:
The rotary disk is segmented into multiple functional regions: a material supply region with a material supply port, a gas supply region with gas supply ports, and a particle formation region with a cylindrical portion. This segmentation allows independent control of material flow, gas flow, and particle formation processes, enabling precise control over particle size distribution while maintaining ease of operation
Solution Approach 2:
Gas is introduced as an intermediary substance between the material supply and the particle formation process. The gas flows through gas supply ports and directs material toward the cylindrical portion, mediating the interaction between material and rotation forces. This intermediary gas flow enables precise control of particle size consistency without compromising operational simplicity
2Manufacturing precision
If material is supplied directly to rotary disk without gas direction, then simple structure is maintained, but material popping occurs and turbulent air flows cause particle size variation
Solution Approach 1:
The material supply port and multiple gas supply ports are merged into a single integrated material supply system located on the rotary disk. The gas supply ports are positioned to work in conjunction with the material supply port, creating a unified system that directs material flow while suppressing popping and turbulence. This merging achieves precise particle size control without significantly increasing structural complexity
Solution Approach 2:
Gas is supplied in advance through gas supply ports before material reaches the particle formation zone. This preliminary gas flow establishes a controlled environment that prevents material popping and suppresses turbulent air flows before they can affect particle size. The preliminary action of gas supply enables narrow particle size distribution without complex additional structures
3Manufacturing precision
If gas supply port is added outside material supply port, then material popping is suppressed and particle size consistency improves, but device structure becomes more complex
Solution Approach 1:
Gas supply ports are strategically positioned at specific locations around the material supply port on the rotary disk. Each gas supply port is located to perform a specific function: directing material flow, suppressing popping at critical zones, and controlling turbulence in the particle formation region. This localized gas supply approach achieves precise average particle size control while minimizing structural complexity through targeted rather than universal gas distribution
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 effectively produces particles with a targeted average particle size and reduced variation, preventing material popping and deformed substance formation, thereby achieving a narrower particle size distribution and higher product quality.
Implementation Method 1
the gas supplied from the gas supply port directs the material supplied from the material supply port in such a way that the material comes into contact with a surface of the cylindrical portion
Implementation Method 2
a rotary disk having a plate portion and a cylindrical portion extending from the plate portion... discharging the material as particles out of the rotary disk
Data Source
AI summary
Embodiments provide a particle production apparatus enabling the production of particles having an intended particle size and a narrow particle size distribution. A particle production apparatus includes a rotary disk and a material supply portion. In the material supply portion, a gas supply port is configured to supply a gas formed outside a material supply port. The gas supplied from the gas supply port directs the material supplied from the material supply port in such a way that the material comes into contact with the surface of the cylindrical portion.