The working mechanism of a magnetic filter can be divided into three key steps:
1. Magnetic Field Generation
* Permanent Magnet Type: Uses strong magnetic materials such as neodymium iron boron to create a constant magnetic field.
* Electromagnetic Type: Generates an adjustable high-gradient magnetic field through a DC excitation coil.
2. Impurity Adsorption
When a fluid containing ferromagnetic particles such as iron filings and steel powder flows through the magnetic field, the particles are attracted to the surface of the magnet or to magnetic fillers such as steel wool due to the magnetic force.
3. Impurity Removal
* Manual Cleaning: Regularly remove the magnetic rod or filter element for cleaning.
* Automatic Scraping: Uses a rotating magnetic rod with an oil scraper to continuously remove impurities.
* Backwash System: Self-cleaning is achieved by flushing the magnetic material with reverse water flow.
Technology Extensions and Functional Enhancements
Modern magnetic filters often incorporate the following technologies to enhance performance:
* Fluid Dynamics Optimization: Uses turbulent flow to aggregate impurities, while the filter screen intercepts non-magnetic particles.
* Intelligent Control System: Real-time monitoring of impurity concentrations and automatic adjustment of magnetic field strength or triggering of cleaning procedures.
* Composite Filtration Structure: Layered arrangement of magnetic rods and filter screens simultaneously treats both magnetic and non-magnetic impurities.
Typical Applications
This technology is widely used in:
* Mechanical and hydraulic systems: Protecting precision components from wear caused by iron chips.
* Water treatment: Magnetized water offers a wide range of applications for anti-scaling and sterilization.
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