Disc Stack Spacing in Centrifugal Separators to Prevent Clogging
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Solution Overview
Problem
Existing centrifugal separators face limitations in separation capacity and are prone to clogging due to the limited surface area of separation discs and the risk of particles getting trapped between discs, especially in low-temperature dairy processing.
Innovation Solution
The centrifugal separator employs two sets of discs with different spacing distances, where the first set has discs separated by less than 0.3 mm and the second set by more than 0.3 mm, reducing the risk of clogging and allowing larger particles to escape, thereby increasing separation efficiency and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the distance between separation discs is reduced to increase the number of discs in the disc stack, then the separation capacity is improved, but the risk of clogging increases due to particles getting trapped between closely spaced discs
Solution Approach 1:
The disc stack is segmented into multiple discs with consistently small spacing (less than 0.3 mm) between adjacent discs, creating numerous separation stages within the available height. This segmentation allows high separation capacity while the uniform small spacing prevents particle entrapment that would occur with variable or larger gaps.
Solution Approach 2:
The spacing parameter between discs is optimized to be less than 0.3 mm, which is sufficiently small to enable effective separation of dairy products into light and heavy phases, yet small enough to prevent particles from becoming trapped. This parameter change resolves the contradiction by finding the optimal value that simultaneously improves separation capacity and reduces clogging risk.
2Reliability
If the distance between separation discs is increased to reduce clogging risk, then the reliability is improved, but the total number of discs that can be fitted decreases, reducing separation capacity
Solution Approach 1:
Rather than using a few discs with large spacing, the system segments the separation bowl into many discs with small uniform spacing (less than 0.3 mm). This creates numerous separation stages that maximize the use of available bowl height, achieving high separation capacity while maintaining reliability through consistent small gaps that prevent particle entrapment.
Solution Approach 2:
The solution moves from considering only the radial dimension of separation to optimizing the axial dimension by fitting many thin discs vertically within the bowl height. This dimensional approach allows maximizing the number of separation stages (productivity) while maintaining small spacing (reliability) by utilizing the vertical space efficiently.
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 design enhances separation capacity and reduces the risk of clogging, maintaining high skimming efficiency even at low temperatures, with fewer maintenance interruptions and increased throughput.
Implementation Method 1
Separators for separating liquid mixtures into different phases of varying density under the influence of a centrifugal force are called centrifugal separators.
Implementation Method 2
Under the influence of the centrifugal force, heavier components begin to settle radially outwards whereas components of lower density settle radially inwards
Data Source
AI summary
A centrifugal separator for separating a dairy product into at least a liquid light phase and a heavy phase. The centrifugal separator comprises a disc stack of frustoconical discs arranged inside the centrifuge bowl. The disc stack comprises a first set of discs and a second set of discs. The discs in the first set of discs are separated from each other by spot-formed spacing members and with a distance that is smaller than 0.3 mm, and the discs in the second set of discs are separated from each other with a distance that is larger than 0.3 mm.