Cyclone Inlet Expansion for Submicron Powder Separation
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Solution Overview
Problem
Conventional cyclone apparatuses are inefficient in collecting fine powder of submicron size without the use of filters, as the collection position and air current outlet are close, leading to mixing and reduced separation efficiency.
Innovation Solution
A cyclone apparatus with an air current inlet section having a diameter that gradually increases downward and a conical section in an inverted conical shape, allowing for a gradual decrease in angular speed and improved centrifugal separation of fine powders, preventing air current mixing and enhancing collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the collection position and air current outlet are placed close to each other to reduce apparatus size, then the apparatus is more compact, but the separated powder and air current easily mix, reducing separation efficiency
Solution Approach 1:
The cyclone apparatus is divided into distinct functional sections: an upper separation section where powder is separated from air current, and a lower collection section where powder is collected. The air current outlet is positioned in the upper section while the collection position is in the lower section, spatially segmenting the processes to prevent mixing and maintain separation efficiency while keeping the overall apparatus compact.
2Reliability
If a filter such as a bag filter is used to collect fine powder of submicron size, then collection efficiency of fine powder is improved, but the device complexity and maintenance requirements increase
Solution Approach 1:
The invention changes the physical parameters of the cyclone apparatus, specifically the shape of the air current inlet section (using a spherical or hemispherical shape with diameter gradually increasing downward) and the configuration of the conical section, to enhance centrifugal separation effectiveness. These parameter changes enable the apparatus to collect fine powder of submicron size without requiring additional filter components, thereby maintaining high collection efficiency while reducing device complexity.
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 collects fine powders of submicron size with increased efficiency, preventing air current mixing and allowing for continuous operation without filter-related issues, while reducing energy consumption and maintaining separation efficiency.
Implementation Method 1
an air current mixed with powder is taken in a tangential direction of the cyclone body 21 from an air current inlet 23 in a swirl. The powder mixed in the air current is separated from the air current by centrifugal force
Implementation Method 2
the powder decelerated by collision with the internal wall surface of the cyclone body 21 drops by gravity along an internal wall surface of the conical section 22
Data Source
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AI summary
It is an object of the present invention to provide a cyclone apparatus capable of improving efficiency of separation and collection of fine powder of submicron size. The cyclone apparatus separates powder mixed in an air current from a swirling air current to collect the powder, and includes an air current inlet section 12 that is provided with an air current inlet 14 for taking an air current mixed with powder from a tangential direction and that has a diameter gradually increasing downward, and a conical section 13 in an inverted conical shape that is connected to a lower end of the air current inlet section 12 and that has a diameter gradually decreasing downward.