Density Stratification of Seeds Using Magnetic Fluid Segmentation
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Solution Overview
Problem
Existing methods for separating particles with small density differences in a process stream are hindered by turbulence, which leads to inefficient separation and incorrect fractioning of particles.
Innovation Solution
A method and apparatus that introduce particles into a process fluid to create a turbulent partial flow, which is then combined with a laminar flow and subjected to a magnetic field, allowing for density-stratification and precise separation of particles based on their density, using a separating organ to achieve efficient separation of particles with minimal turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If particles are introduced directly into the process stream without creating a turbulent partial flow, then turbulence is minimized, but particles with small density differences cannot be effectively separated
Solution Approach 1:
The process stream is segmented into two distinct partial flows: a turbulent first partial flow for particle introduction and mixing, and a laminar second partial flow for stable density stratification. This segmentation allows particles to be effectively mixed and separated by density without the harmful effects of turbulence in the separation zone.
Solution Approach 2:
Different flow conditions are applied to different regions of the process stream. The first partial flow is created with turbulent characteristics to facilitate particle mixing and introduction, while the second partial flow maintains laminar conditions to enable precise density-based separation. This local differentiation of flow quality optimizes both particle introduction and separation precision.
2Ease of operation
If a large turbulent partial flow is used for particle introduction, then particles are well mixed, but the separation efficiency decreases due to excessive turbulence
Solution Approach 1:
The process stream is divided into two partial flows with different volumetric proportions. The first turbulent partial flow constitutes approximately 10% of the total process stream, providing sufficient particle mixing while the second laminar partial flow (90%) dominates the separation zone to ensure precise density-based separation with minimal turbulence interference.
Solution Approach 2:
The volumetric proportion of the turbulent partial flow is optimized to approximately 10% of the total process stream. This parameter adjustment ensures adequate particle mixing and introduction while maintaining laminar flow conditions in the majority of the stream for high-precision separation, thus balancing mixing effectiveness with separation accuracy.
3Device complexity
If only permanent magnets are used for generating the magnetic field, then the device is simple, but separation results are insufficient for particles with small density differences
Solution Approach 1:
The magnetic field generation method is changed from using only permanent magnets to using electromagnets or superconducting magnets that can generate stronger and more controllable magnetic fields. This parameter change in the magnetic field generation system enables effective separation of particles with small density differences by providing the necessary magnetic force strength and controllability.
Solution Approach 2:
The magnetic field generation system transitions from simple permanent magnets to more advanced electromagnetic systems (electromagnets or superconducting magnets). This composite approach combines electrical energy conversion with magnetic field generation to achieve the required field strength and precision for separating particles with small density differences, overcoming the limitations of permanent magnets alone.
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 method effectively separates particles with small density differences by minimizing turbulence and optimizing the vertical separation distance, enabling the separation of up to 10 different density fractions, particularly suitable for particles with densities between 600-1500 kg/m³, and allows for the reuse of the process fluid.
Implementation Method 1
The process fluid of the process stream according to the invention usually consists of a suspension of iron oxide particles in water or kerosene
Implementation Method 2
the process stream is subjected to a magnetic field for the realization of a density-stratification in the process stream, such that the individual particles or seeds in the process stream assume a density-dependent position
Implementation Method 3
the particles or seeds are introduced into a process fluid and mixed in order to obtain a turbulent first partial flow of the process fluid
Implementation Method 4
a laminar second partial flow of the process fluid for the formation of the process stream
Data Source
Figure 1
Figure 2
AI summary
A method for separating seeds of different densities in a process stream, wherein the seeds are introduced into a magnetic process fluid for the formation of the process stream, which process stream is subjected to a magnetic field for the realization of a density stratification in the process stream, such that the individual seeds in the process stream assume a density-dependent position, after which the seeds located in or near a predetermined position or positions in the process stream, are separated from the remaining seeds in the process stream.