Gas-Inducing Impeller with Segmented Blades for Stirring
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Solution Overview
Problem
Conventional stirrers fail to enhance the flow rates and transfer efficiencies of substances during the reaction process due to the density difference between gas and liquid, leading to inefficient gas absorption and movement.
Innovation Solution
A device with a hollow shaft and gas-inducing impeller featuring blades of different lengths, where the blades protrude outward from the space between discs, allowing direct contact between emitted gas and long blades, and incorporating shaft holes to improve flow rates and transfer forces, with an upward flowing general impeller to react with the gas-inducing impeller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If revolutions per minute are raised to increase contact areas between gas and liquid, then gas absorption increases, but the flow rates of substances and transfer efficiencies are not improved due to density difference between gas and liquid
Solution Approach 1:
The impeller blades are segmented into different lengths (long blades and short blades) to create varied flow paths. This segmentation allows gas bubbles to be distributed and contacted with different blade surfaces, improving both gas absorption and substance flow rates simultaneously by addressing the density difference issue through structural division
Solution Approach 2:
The invention introduces a vertical dimension to blade length variation, transitioning from conventional uniform horizontal blades to three-dimensional structured blades with different heights. This dimensional change creates multiple contact levels for gas-liquid interaction, enhancing both absorption quantity and transfer efficiency that were previously limited by density differences
2Quantity of substance
If gas is emitted from the end of the impeller, then gas is introduced to liquid, but the gas moves up fast due to density difference, resulting in poor transfer efficiencies
Solution Approach 1:
The impeller employs asymmetric blade design with different blade lengths arranged in a specific pattern. This asymmetry creates uneven gas distribution and extended residence time for gas bubbles, forcing them to travel longer paths through the liquid rather than rising directly, thereby improving transfer efficiency while maintaining gas introduction quantity
Solution Approach 2:
The longer blades act as intermediaries that capture and redirect gas bubbles. Instead of gas moving directly from impeller to liquid surface, the long blades serve as intermediate structures that hold and redistribute gas bubbles, increasing contact time and improving transfer efficiency
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 device significantly accelerates the reaction of substances by improving flow rates and transfer efficiencies, reducing gas bubble sizes, and increasing mass transfer coefficients, resulting in faster reaction speeds and smoother substance flows.
Implementation Method 1
a hollow shaft (10) rotatable by a drive unit (200), and having at least one or more shaft holes (12) formed on an upper portion
Implementation Method 2
a gas-inducing impeller (40) having a plurality of blades (41, 42) each consisting of a pair of a long blade (41) and a short blade (42)
Implementation Method 3
the long blades (41) protruding outward from the space between the lower disc (30) and the upper disc (50)... a portion of the gas emitted between each long blade (41) and each short blade (42) comes into direct contact with the neighboring long blade (41)
Data Source
AI summary
Provided is a device for accelerating reaction of substances to be stirred, the device including: a hollow shaft having at least one or more shaft holes formed thereon; a fixing shaft disposed inside the hollow shaft in such a way as to protrude downward; a lower disc fitted to the fixing shaft; a gas-inducing impeller located on top of the lower disc and having a plurality of blades each consisting of a pair of a long blade and a short blade, the long blades protruding outward from the space between the lower disc and an upper disc; the upper disc fitted to the fixing shaft in such a way as to be spaced apart from the lower disc on the lower periphery of the hollow shaft and having an inlet hole formed at the center thereof; and a general impeller fitted to the lower end of the fixing shaft.