Continuous Stirrer with Arc-Shaped Pins for Mixing Efficiency
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Solution Overview
Problem
Existing continuous stirrers face limitations in increasing stirring efficiency due to the finite strength of stirring pins, which restricts the number of pins and thus the stirred area, hindering further improvement in mixing effectiveness.
Innovation Solution
The stirrer features a cavity with axially staggered arc-shaped or curve-shaped outer and inner stirring pin groups, allowing for a larger pin area and reduced force application, enabling more pins within the same volume and enhancing mixing efficiency by aligning force directions for improved substance and gas mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of stirring pins is increased to expand the stirred area, then the stirring effect is improved, but the strength limitation of individual pins restricts further increase
Solution Approach 1:
The patent applies curvature by changing the stirring pin shape from straight cylinder to arc-shaped or curve-shaped. This curvature increases the surface area of each pin without increasing its linear dimensions, allowing more pins to be installed within the same volume while maintaining individual pin strength. The curved surface provides better fluid contact and stirring effectiveness.
Solution Approach 2:
The patent introduces axial staggering between inner and outer stirring pin groups, adding a dimensional arrangement that maximizes the utilization of available space. This multi-layered axial distribution allows pins to be positioned in three-dimensional space efficiently, increasing the total number of pins without compromising structural integrity.
2Quantity of substance
If the size of stirring pins is reduced to accommodate more pins, then the number of pins increases, but the stirring effectiveness of each pin decreases
Solution Approach 1:
The arc-shaped or curve-shaped design increases the effective surface area of each pin, compensating for the reduced size. The curved geometry provides greater contact area with the fluid being stirred, maintaining stirring efficiency even as individual pin dimensions are reduced to allow more pins to be installed.
Solution Approach 2:
The patent changes the geometric parameters of the stirring pins from straight cylindrical form to curved forms. This parameter change in shape rather than size allows each pin to maintain adequate stirring capability while reducing the overall volume occupied by each pin, enabling higher pin density.
3Area of stationary object
If more stirring pins are installed to increase the stirred area, then the mixing effectiveness improves, but the device complexity increases
Solution Approach 1:
The patent employs a nested structure with inner and outer stirring pin groups arranged axially. The inner pins are positioned within the cavity formed by outer pins, creating a compact nested arrangement that maximizes stirred area while maintaining a relatively simple overall structure that can be manufactured as an integrated unit.
Data Source
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AI summary
Disclosed in the present invention is a continuous stirrer, which comprises a receiving chamber (4) provided with a front material inlet (1), a back material inlet (2) and multilayer outer stirring needle groups (3) along axial direction and a stirring shaft (6) installed in the receiving chamber (4) in a sealing manner and provided with multiple inner stirring needle groups (5) along axial direction. The outer stirring needle groups (3) and the inner stirring needle groups (5) are staggered along axial direction, wherein inner stirring needles (5a) constituting the inner stirring needle groups (5) and outer stirring needles (3a) constituting the outer stirring needle groups (3) are arc or curve.