The high-efficiency permanent magnet filter

The high-efficiency permanent magnet filter has an oblong cylindrical structure with permanent magnets on the outside. The permanent magnets can be easily moved in and out of the cylindrical body through a pneumatic mechanism. A number of filter elements composed of magnetic metal fibers are arranged in the oblong cylinder in the magnetic field area. During operation, the magnet magnetizes the filter element in the magnetic field region, so that the magnetic particles in the liquid to be filtered are adsorbed on the surface or inside of the filter element. After the filter element captures a certain amount of magnetic-philic impurities, the filtering capacity decreases.

When the pressure difference between the inlet and outlet of the filter reaches the set value, or the timer reaches the preset time, the backwashing mechanism is started to clean the filter element. At this time, the magnetic field moves out of the cylinder, and the moisture adsorbed on the filter element is backwashed. The magnetic particles are washed away, and the filter is discharged through the sewage pipe. After the backwashing is completed, the filter is washed back to the filtering (working) state. In order to save the cost of reconstruction, the alkali immersion tank, alkali scrubbing tank and electrolytic cleaning tank share a set of magnetic filter device. , Adopt the control method of switching the use separately. When the magnetic filter is used for a period of time, the magnetic filter should be cleaned by the backwash pump to remove the iron powder and dirt in the filter to ensure the filtering effect. This kind of high-efficiency magnetic filter was mainly imported from abroad as an important equipment of degreasing unit in the early stage. Later, it has been domestically produced as a result of introduction and digestion, and it has been widely used in the degreasing section circulation system of domestic medium and low-speed hot-dip galvanizing lines and continuous annealing units. Application; The common flow specification is about 200～800L/min.