Rotary Drum Separator for Immiscible Fluids
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Solution Overview
Problem
Existing centrifugal separators for immiscible fluid separation are bulky, heavy, expensive, and not suitable for portable or mobile applications due to long separation times and limited density and volumetric ratios, as well as clogging issues and shear generation.
Innovation Solution
A rotary drum separator with a solid rotation stage, migration and coalescence stage, and extraction stage, featuring longitudinal partitions and weirs to manage fluid flow and separation, with radial inner walls and circumferential drive fins to maintain solid rotation and separate liquids efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If gravity separators are used for fluid separation, then separation is achieved, but separation time is very long and device is bulky
Solution Approach 1:
The patent applies centrifugal force (changing the physical parameter from gravitational to centrifugal acceleration) to dramatically reduce separation time while maintaining a compact device volume. The rotary drum generates centrifugal acceleration that forces immiscible fluids to separate by density, achieving rapid separation without requiring large separation distances.
2Loss of time
If rotating separators with centrifugal effect are used, then separation time is reduced, but device becomes complex and very heavy
Solution Approach 1:
The rotary drum is segmented into multiple longitudinal compartments separated by internal partitions. Each compartment functions as an independent separation chamber, allowing the device to handle variable flow rates and fluid properties while maintaining simple overall structure. This segmentation enables flexible operation without increasing device complexity.
Solution Approach 2:
The rotary drum design serves multiple functions simultaneously: it generates centrifugal force for separation, provides structural support, creates multiple flow paths through partitions, and enables handling of various fluid types and density ratios. This multi-functionality reduces the need for additional components, simplifying the overall device.
3Stability of the object's composition
If longitudinal vanes are arranged in centrifugal separator, then axial alignment of emulsion is achieved, but significant shear and circumferential beating are generated
Solution Approach 1:
Instead of using longitudinal vanes that extend from the drum wall toward the center (which create shear), the patent uses longitudinal partitions that extend from the center toward the drum wall. This inverted arrangement allows emulsion to flow axially along the partitions without experiencing circumferential beating, while still achieving proper alignment through the centrifugal field.
4Manufacturing precision
If centrifugal separator is designed for specific density ratios, then separation efficiency is improved, but adaptability to different emulsions is limited
Solution Approach 1:
The rotary drum speed is made variable, allowing the centrifugal acceleration to be adjusted dynamically. This enables the separator to adapt to different fluid density ratios and viscosities by optimizing the rotational speed, maintaining high separation efficiency across a wide range of emulsion types without requiring physical modifications to the device.
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 solution enables efficient separation of immiscible fluids with reduced separation times, improved portability, and expanded density and volumetric ratios, minimizing clogging and shear, thus enhancing the separation process.
Implementation Method 1
The drum comprises internally, longitudinally from upstream to downstream and between at least one upstream inlet and downstream outlets a solid rotation stage, a migration and coalescence stage and an extraction stage
Data Source
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AI summary
A device for separating immiscible fluids of different densities from an emulsion containing at least one liquid, comprising a longitudinal rotary drum having a longitudinal axis of rotation. Said drum comprises, longitudinally from upstream to downstream and between at least one upstream inlet (29) and downstream outlets (49): a solid body rotation stage (33) having an inlet (29) and comprising at least one longitudinal inner partition (31) for causing circumferential solid body rotation; a migration and coalescence stage (40) comprising at least one longitudinal partition (38) for causing circumferential solid body rotation, said partition (38) delimiting at least one longitudinal channel that communicates with the solid body rotation stage (33); and an extraction stage (41) comprising at least one liquid outlet (42) that has an overflow edge (45) and extends along a longitudinal flow space (44) communicating with the migration and coalescence stage via at least one longitudinal passage (36), and comprising a downstream liquid discharge space (48) communicating with the outlet and connected to a downstream discharge port.