Stainless steel woven wire mesh is widely used in filtration, screening, and food and pharmaceutical industries due to its fine aperture and high corrosion resistance. However, long-term operation can lead to problems such as oil stains, particle blockage, efflorescence, or calcium and magnesium scale. Proper cleaning can restore throughput and extend service life.

      Ⅰ. What are some common cleaning methods?

        Mechanical cleaning: Suitable for applications where loose particles or deposits are easily dispersed, often used for online maintenance and initial unclogging. Backwashing can clear blockages in most cases without interrupting equipment.

        Ultrasonic cleaning: It effectively removes sludge and fine particles, suitable for precision mesh and removable filter elements. Ultrasonic cleaning is environmentally friendly and causes minimal damage to the mesh.

        Chemical Cleaning:For grease or scale, alkaline degreasers or acidic descaling agents can be used. Food-grade solvents must be used for food and pharmaceutical mesh.

        Passivation/Pickling: When welded or contaminated with heat stains or rust, pickling is necessary to remove the oxide scale, and passivation is required to restore the corrosion-resistant film of the stainless steel.

      Ⅱ. Detailed cleaning steps and precautions (operation guide)

        1. First, conduct a visual inspection and record pressure/flow changes to determine the degree of blockage and the type of contaminant.

        2. If the deposits are loose, try backflushing or pressure flushing. The water pressure and flow direction should be within the allowable production range to avoid deformation.

        3. For grease and stubborn organic matter, first soak in an alkaline degreasing solution or ultrasonically clean, then rinse thoroughly with clean water, and finally blow dry or heat dry to prevent residual water from causing localized corrosion.

        4. For welding discoloration or iron stains, commission a professional to perform pickling and passivation treatment, and strictly follow the process for thorough neutralization and rinsing to avoid acid residue.

        After cleaning, perform functional verification: measure differential pressure, filtration efficiency, and conduct sampling inspections. Production can only resume after confirming that the pressure has returned to an acceptable level.