Centrifuge Separation Discs With Microgrooves
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Solution Overview
Problem
Existing centrifuge separating plates with flow-influencing parts on their surface hinder particle transport and liquid flow, leading to backmixing of solid particles with the liquid, reducing separation efficiency.
Innovation Solution
The use of microgrooves with specific orientations and depths on the separating plates, combined with an abrasion-resistant coating and strategically placed tabs, guides solid particles radially towards the outer edge, reducing backmixing and enhancing separation efficiency by creating channels for solid transport and minimizing surface tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flow-influencing parts with square shape are applied to the separating plate surface, then particle attachment is improved, but particle transport in the radial direction is hindered and backmixing occurs
Solution Approach 1:
The surface structure is segmented into multiple functional zones: a roughness structure for particle attachment, microgrooves for guiding particle transport, and a smooth transport zone near the outer edge. This segmentation allows each zone to perform its specific function optimally without interfering with other functions.
Solution Approach 2:
Different surface properties are applied to different radial positions on the separating plate. The inner region has roughness for attachment, the middle region has microgrooves for guided transport, and the outer region has a smooth surface for efficient particle discharge. This local differentiation resolves the contradiction between attachment and transport.
2Reliability
If flow-influencing parts are applied to the separating plate surface, then particle attachment increases, but liquid flow is hindered causing backmixing
Solution Approach 1:
The surface is segmented into attachment zones with roughness and flow channels with smooth surfaces. The flow channels are positioned to allow liquid to pass freely while the roughness zones capture particles, preventing liquid flow hindrance while maintaining particle attachment.
Solution Approach 2:
The microgrooves act as intermediary structures that guide both liquid flow and particle transport. They provide a pathway that directs liquid flow away from attached particles while simultaneously guiding particles radially outward, preventing backmixing of liquid and solids.
3Reliability
If microgrooves are used for particle guidance, then backmixing is reduced, but device complexity increases
Solution Approach 1:
Complex mechanical particle transport mechanisms are replaced by optimizing surface geometry and utilizing centrifugal forces. The microgrooves and surface roughness work passively with the centrifugal field to guide particles, eliminating the need for active mechanical transport systems.
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
This configuration effectively reduces backmixing of solid particles with the liquid, improves particle transport, and increases separation efficiency by guiding particles to the outer edge for collection, while preventing clogging and maintaining flow efficiency.
Implementation Method 1
a centrifuge with a separation plate pack (2), which is designed to separate solids from a liquid to be clarified in a centrifugal field
Implementation Method 2
the separating plates have a surface structure, in particular in the form of microgrooves (15), which serve to guide the solid particles on the separating plate in the radial direction
Data Source
Figure 1~2
Figure 3
Figure 4~7
AI summary
The invention relates to a centrifuge, in particular a separator or a solid bowl screw-type centrifuge, comprising a drum in which a separator disk packet (2) made of stacked conical separator disks (3, 3', 30) is arranged, each disk having a separator disk upper face and a separator disk lower face, characterized in that at least some regions of at least one or more of the separator disks (3, 3', 30) have a surface structuring (15, 19, 21, 23, 25, 28, 39) on the separator disk lower face.