Polypropylene (PP) cotton filter element in the process of use, the surface of the filter cotton will often quickly accumulate dirt and blockage, resulting in increased pressure drop and purification efficiency decline. The following introduces the purification and regeneration treatment method of polypropylene cotton filter element.
1. High-pressure water flushing
The most common method, using high-pressure water washing to remove surface dirt. But pay attention to use Low-Mid pressure to remove dirt first, high pressure may destroy PP cotton material.
2. Air pressure cleaning
The polypropylene cotton filter element was washed with a high air pressure of 8~12MPa to effectively expand the porous structure and have a good purification effect.
3. Use a cleaner
Use dilute acid detergent, alcohol, abrasive and other cleaning solutions compatible with PP materials.
4. ultrasonication
Soak the polypropylene cotton filter in the cleaning solution and use the appropriate frequency.
5. Chemical regeneration
In extreme cases, specialized chemicals can be used to remove difficult to remove dirt, but pay attention to the effects of chemical agents on PP.
6. Heat treatment
Thermal circulation of the polypropylene cotton filter element at the temperature of 130 C can remove part of the bonded dirt, but strictly control the temperature does not exceed the applicable range of PP.
To sum up, the purification and regeneration of polypropylene cotton filter element mainly use water pressure washing and air pressure cleaning, and combined with other auxiliary methods to achieve the best effect. Focus on compatibility with PP materials when selecting cleaners.
In addition, pretreatment and other measures help reduce the dirt of polypropylene cotton filter and prolong the service life.
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