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Jan 24, 2025
PP filter cloth, also known as polypropylene filter cloth, may occasionally encounter the problem of material leakage during long-term filtration processes. This mainly stems from factors such as material aging, structural damage, and operational issues. Different solutions should be adopted according to various causes of leakage. The following content is provided for reference only.
Fiber Loosening:Under the long-term pressure from equipment and materials, the gaps in the fiber layers of the PP filter cloth gradually loosen due to repeated extrusion or tension forces. This leads to a decrease in the filtration efficiency.
Mechanical Damage: In complex working conditions, sharp material particles or hard impurities may scratch the surface of the filter cloth, resulting in tearing, thread breakage, or bulging. Additionally, sharp parts of the equipment rollers or frames may scrape the filter cloth during installation or operation.
Overpressure and Overflow: Excessive filtration pressure or rapid pressurization may exceed the filter cloth’s tolerance. Similarly, too much feed slurry can cause overflow from the cloth edges.
Material Quality Issues: The filter cloth material with poor abrasion resistance or a weaving process that fails to meet the standards can accelerate the aging process of the filter cloth.
Replacement Cycle: Replace filter cloth every 3 to 6 months depending on working conditions, and replace immediately if damaged.
Pressure and Feed Control: Avoid operating under excessive pressure. Adjust feed rate and ensure it matches filtration pressure.
Equipment Adjustment: Check the tension of the rollers to avoid excessive pressure on the filter cloth. Add adjusting rollers to improve corner alignment of the cloth.
Precision Matching: Select filter cloth with appropriate pore size based on particle size. Use secondary calendaring if necessary to refine filtration accuracy.
Proper Installation: Ensure that the filter cloth is free of wrinkles and adheres closely to the filter plate/frame.
Equipment Cleaning: Remove any hard residues from the equipment before installation to prevent filter cloth scratches during operation.
