Translation of Paper Machine Wear Part Information

Service Life of Wear Parts in Paper Machines

1. Forming Section

This is one of the areas with the most severe wear, as components are in direct contact with pulp containing fibers, fillers, and chemicals.

• Forming Fabric: One of the parts with the shortest service life.
  • Influencing Factors: High-speed wear, chemical corrosion, fatigue caused by regular intermittent high-pressure water washing and chemical cleaning. Its service life may be even shorter when producing high-grade tissue paper, while it can be extended when producing paperboard or using high-quality raw materials.

2. Press Section

This section is responsible for mechanical dewatering, where pressure and friction are the main destructive factors.

• Press Felt:
  • Influencing Factors: Extremely high linear pressure, vacuum suction, and clogging caused by fine fibers, fillers, and resins from the pulp. Regular high-pressure water and chemical cleaning are crucial for maintaining its performance, but it will eventually need replacement due to permanent clogging or wear.

3. Drying Section

High temperature and chemical environment are the main challenges here.

• Dryer Screen:
  • Influencing Factors: Long-term exposure to high temperatures (up to over 100°C) and corrosion from volatile chemicals (such as sulfides and chlorides) evaporated from the paper web. The air permeability of the dryer screen will gradually decrease, affecting drying efficiency.

How to Effectively Extend the Service Life of Components?

1. Precise Operation: Avoid sudden speed increases, decreases, and shutdowns to reduce impact on fabrics and felts.
2. Optimize Chemical System: Control the pH value and conductivity of pulp and white water to reduce the deposition of corrosive and viscous substances.
3. Effective Cleaning Procedures: Conduct regular and thorough online and offline cleaning of fabrics and felts to prevent irreversible clogging.
4. Preventive Maintenance: Regularly check the dynamic balance and alignment of rolls, inspect the fitting degree of doctor blades, and promptly address minor issues to avoid triggering more serious chain damage.
5. Spare Part Quality: Use high-quality spare parts that match the paper machine design and process. Although the initial investment is higher, the total life-cycle cost may be lower.

        For spare parts such as paper machine forming fabrics, press felts, and dryer screens, Shijiazhuang Yarns Technology Co., Ltd. is your best choice.