How to Clean Filter Press Cloth? 5 Cleaning Methods

Keeping your filter press cloths clean is crucial for optimal performance and efficiency. As the initial filtration barrier in a filter press system, dirty or clogged cloths can slow production, extend drying times, and decrease yield. Fortunately, with some basic maintenance, you can keep those filter cloths running like new.

In this post, as a professional filter press manufacturer, I will share 5 useful methods for cleaning your filter press clothes.

Why Is Filter Press Cloth Cleaning Important?

Over time, filter cloths become clogged with fine particles that get lodged deep in the fabric weave. This accumulation has several negative impacts:

• Higher filtration pressure and longer cycles
• Wetter filter cakes
• Decline in filtration rates
• Potential cloth damage from blowouts

Cleaning removes these particles, restores cloth porosity and filtration efficiency, and prevents further issues.

When Should You Clean the Filter Press Cloths?

Don’t wait until cloth damage or dramatic process changes push you to act. Instead, make basic cleaning part of your regular maintenance plan.

Signs it’s time to clean:

• Filtration cycles exceed normal time
• Increase in initial filtration pressure
• Wetcakes
• Cloudy filtrate, indicating particle passage

Also thoroughly clean cloths whenever:

• The press has sat idle for multiple days
• Inspecting used cloths before reinstalling
• Switching applications (clean after use to prevent cross-contamination)

Establishing a routine cleaning regimen maximizes performance, efficiency, and cloth lifespan.

How to Clean Filter Press Cloth?

Cold Water Rinsing

A simple spray wash with cold water removes residual buildup from cloth surfaces. Use this method weekly or between cycles to prevent over-accumulation.

High-Pressure Power Washing

Every 1-3 months (application dependent), do a more vigorous power spray wash. This penetrates cloth depth to flush trapped particles from the weave itself.

Use 800-1200 PSI with a 2-10 GPM capacity unit. Fan nozzle setting, 12-18 inch spray distance.

Acid Washing

For stubborn contaminants in metal finishing or lime-based slurries, acid washing dissolves lodged particles. 5-10% hydrochloric acid solution recirculated for 1-2 hours restores filtration rates.

Immerse and Soak

Remove plates and submerge in acid/water solution bath for difficult cloth cleaning. Less efficient than in-press methods but useful for offline cleaning.

Add a Cleaning System

Automated spray manifold systems integrate with the press for routine cloth cleaning. Program cycles based on hours run, pressure increase, or manual activation.

Best Filter Press Cloth Cleaning Practices

• Always use proper protective equipment when handling chemical cleaning solutions
• Rinse thoroughly after any chemical wash
• Change backer cloths when replacing filter cloths
• Air or mechanically dry; do not tumble dry (causes cloth shrinkage)
• Never mix cleaning solutions directly in the press

Conclusion

Regular filter cloth cleaning pays dividends through better process efficiency, reduced downtime, optimized yields, and extended cloth lifespan. Establish a routine cleaning regimen matched to your application and press throughput. Consistent care reduces operating costs and keeps your filter press performing optimally for years.