Bent Blade Mixing Impeller for Uniform Chemical Treatment
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Solution Overview
Problem
Conventional mixing impellers in chemical reaction apparatuses often cause the surface of treatment targets to become raised or inclined during mixing, leading to uneven treatment and potential adherence to vessel walls, resulting in dried or burnt material being mixed back into the target, which affects treatment uniformity and quality.
Innovation Solution
A mixing impeller design featuring multiple blade pairs with symmetric blades attached around a rotational shaft, where the blades are bent to form obtuse angles and include slit-like openings to prevent surface raising and allow air release, ensuring uniform mixing and preventing material adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional mixing blades are used, then mixing action is provided, but the treatment target surface becomes raised and inclined, causing uneven treatment and material adherence
Solution Approach 1:
The blade outer portions are bent toward the side on which the two blades face each other, creating an asymmetric configuration that generates a pushing force directed toward the center of the rotational shaft. This asymmetric bending design prevents the treatment target surface from becoming raised or inclined, thereby maintaining surface uniformity while still providing effective mixing action.
Solution Approach 2:
The blade configuration is modified by bending the outer portions to form obtuse angles, changing the geometric parameters of the blade structure. This parameter change alters the force distribution during mixing, directing the pushing force toward the center and preventing surface elevation, thus resolving the contradiction between mixing effectiveness and surface uniformity.
2Productivity
If mixing is performed to ensure uniform treatment, then mixing effectiveness improves, but treatment target may adhere to vessel walls and be dried or burnt
Solution Approach 1:
The bent blade outer portions create a controlled pushing force that directs material toward the center rather than allowing it to rise and adhere to vessel walls. This asymmetric design enables thorough mixing while preventing material from reaching the vessel walls where it would be exposed to drying and burning conditions.
3Manufacturing precision
If treatment target is prevented from being raised by suppressing movement, then surface uniformity is maintained, but uniform treatment cannot be achieved if mixing is insufficient
Solution Approach 1:
The asymmetric bending of blade outer portions creates a unique force pattern that pushes material toward the center while still providing sufficient mixing action. This design allows the treatment target surface to remain uniform without raising, while the blades continue to effectively mix the material through their rotational motion.
Solution Approach 2:
Different portions of the blade serve different functions: the blade structure is designed with specific bending characteristics in the outer portions to control surface uniformity, while the overall blade configuration maintains mixing effectiveness. This local differentiation of blade properties resolves the contradiction between surface uniformity and mixing performance.
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 design effectively suppresses surface raising of the treatment target, maintains uniform treatment, and prevents material adherence to vessel walls, ensuring consistent and high-quality mixing by allowing proper flow and air release.
Implementation Method 1
the two blades of each blade pair are formed so as to extend from the rotational shaft side toward an outer circumferential side, which is a side opposite to the rotational shaft side, and blade outer portions that are on the outer circumferential side are bent toward a side on which the two blades face each other
Data Source
AI summary
The present invention provides a mixing impeller and the like capable of properly performing mixing. A mixing impeller includes multiple blade pairs each having two blades, wherein the blades included in the multiple blade pairs are attached around a rotational shaft extending in a lateral direction, so as to be positioned at a same position in an axial direction of the rotational shaft, the two blades of each blade pair each have a shape that is symmetric about a symmetry plane that is a plane perpendicular to the rotational shaft, the two blades of each blade pair are formed so as to extend from the rotational shaft side toward an outer circumferential side, which is a side opposite to the rotational shaft side, and blade outer portions that are on the outer circumferential side are bent toward a side on which the two blades face each other.