Magnetic Density Separator Feed Entrainment
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Solution Overview
Problem
Existing magnetic density separators face inefficiencies due to swirls caused by joining the mixture of magnetic process liquid with particles, leading to reduced throughput and potential blocking by heavy contaminants, which necessitates a longer process channel and more expensive magnetization devices.
Innovation Solution
Incorporating an entraining device in the feed system to control the joining of the mixture with laminarized magnetic process liquid, reducing turbulence and allowing for a more efficient velocity profile, thereby improving separation efficiency and enabling higher throughput with a potentially shorter process channel and less expensive magnetization device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mixture of magnetic process liquid with particles is joined to the laminarized flow through jetting channels, then particles can be introduced into the separation zone, but heavy particles block the channels and cause swirls in the laminarized flow
Solution Approach 1:
The feed system is divided into two separate channels: a first feed channel for introducing the mixture and a second feed channel for introducing the laminarized flow. This segmentation prevents the mixture from blocking the jetting channels and causes swirls, while still allowing both streams to be introduced into the separation zone effectively.
Solution Approach 2:
A mixing zone is introduced as an intermediary element between the feed channels and the separation zone. In this mixing zone, the mixture and laminarized flow are allowed to mix before entering the separation zone, preventing direct blocking of jetting channels and reducing turbulence that would cause swirls.
2Measurement precision
If heavy particles are present in the mixture, then they can be separated by density, but they block jetting channels and cause swirls that reduce separation efficiency
Solution Approach 1:
The feed system is segmented into separate channels for the mixture and laminarized flow, preventing heavy particles from blocking jetting channels. This allows for more effective density separation without requiring an excessively long process channel to compensate for channel blocking and swirl-induced inefficiency.
3Productivity
If jetting channels are used to introduce mixture, then particles can be fed into the separation zone, but the channels require high flow speed and have limited maximum particle diameter
Solution Approach 1:
The feed system is divided into separate channels, eliminating the need for high flow speeds through jetting channels. This allows the system to handle a wider range of particle sizes including heavier particles that would otherwise block the channels, while maintaining effective separation performance.
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 entraining device enhances separation efficiency by minimizing turbulence and preventing blocking, allowing for higher throughput and potentially reducing the length of the process channel and the cost of the magnetization device.
Implementation Method 1
a magnetization device that is arranged to extend in flow direction along at least one of the walls of the channel so as to in use apply a magnetic field to the process liquid in a separation zone of the channel to establish a cut density of the magnetic process liquid to separate the particles in the process liquid based on their density
Implementation Method 2
magnetic density separation is used in raw materials processing for the classification of mixed streams into streams with particles of different types of materials
Implementation Method 3
a laminator through which the magnetic process liquid is introduced into the channel to flow laminarized in flow direction along the separation zone
Implementation Method 4
the feed includes an entraining device... the entrainment device is arranged to move with the laminarized flow, preferably with the same velocity as the laminarized flow
Data Source
AI summary
A magnetic density separator comprising a process channel through which in use magnetic process liquid and particles to be separated flow in a flow direction, a magnetization device that is arranged to extend in flow direction along at least one of the walls of the channel so as to in use apply a magnetic field to the process liquid in a separation zone of the channel to establish a cut density of the magnetic process liquid to separate the particles in the process liquid based on their density, a laminator through which the magnetic process liquid is introduced into the channel to flow laminarized in flow direction along the separation zone, and a feed through which a mixture of process liquid and particles to be separated is introduced into the process channel to join the laminarized process liquid, characterized in that the feed includes an entraining device.