Copper powder sintered filter element and copper-based powder die-casting filter core cleaning method

The copper powder sintered filter element and the copper-based powder die casting filter element have no fixed cleaning method. According to the characteristics of the working medium and the characteristics of the impurities in the working medium, one or more methods are combined to achieve the purpose of cleaning.
Copper powder sintered filter cartridges and copper-based powder die-cast filter cartridges can be roughly divided into physical cleaning methods and chemical cleaning methods. The physical method uses high-pressure water or high-pressure air and other substances for forward and backward flushing, or it can use ultrasonic waves to “shock” the less dense foreign particles that adhere to the surface of the filter element or pores. Chemicals use chemical acid and alkali solvents or organic solvents to dissolve the impurities inside the filter element and remove them from the surface of the filter element or the gap walls. These two methods are suitable for the adhesion of gas impurities and liquid impurities. For substances with high adhesion and poor fluidity, the effect is not ideal, and it is difficult for chemical solvents to penetrate into the interior. At this time, another method is required: the calcination process. These high-viscosity substances are calcined into carbon blacks, which are then rinsed with high-pressure water.
Copper powder sintered filter elements and copper-based powder die casting filter elements have a variety of cleaning methods. Combined with the characteristics of the working medium and foreign particles, different methods can be used. The main cleaning methods are: high pressure gas backflushing, liquid recoil, solvent soaking, Ultrasonic cleaning, fire, cooking and so on. For rigid particle impurities such as sand, iron, etc., which can be intercepted on the outside of the filter element in a working medium with water-like viscosity, it can be back-flushed with clean compressed air or nitrogen. It can also be back-flushed or removed with filtered fluid. Backwater with clean water. For the more viscous particles like polymers, they cannot be simply back-flushed with compressed gas. They can be used with hot-vapour back-flushing, flux + hot-water immersion, and then backflushing or recoil. In the case where the solvent cannot be cleaned, the viscous impurities can be burned and carbonized by the method of burning, combined with ultrasonic, backflushing, etc., and the filter element can be cleaned.
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