Ending The Three Major Challenges of EB Drilled Basket Black Liquor Screens: Clogging, Wear, And Deformation

– A Comprehensive Drilled Screen Drum Solution

In pulp and paper alkali recovery, the stable operation of black liquor screens is critical for efficiency and cost control. Clogging, wear, and deformation are core persistent issues, leading to frequent downtime, high maintenance costs, and reduced black liquor extraction that jeopardizes downstream evaporation safety. Our customized drilled screen drum solution tackles these problems at the root for reliable, continuous production.

1. Core Causes & Industry Pain Points

Clogging: Fibers and sticky impurities in black liquor clog traditional screens with poor aperture design, causing flow drops and requiring frequent cleaning.

Wear: Sand and hard particles erode screens, compromising filtration accuracy and risking downstream equipment damage.

Deformation: High temperature/pressure conditions warp traditional screens, leading to vibration, seal failure, and accelerated leakage/wear.

2. Drilled Screen Drum Solution: Addressing Root Causes

For Clogging: Optimized hole design + precise custom apertures.

*Electron-beam/laser drilling ensures smooth, burr-free holes (±0.01mm tolerance) to reduce buildup.

*Custom open area (8%-12%) matches fiber content and flow needs for stable throughput.

For Wear: Premium materials + surface hardening.

*SUS316L stainless steel or duplex steels (2205/2507) offer superior alkali, heat, and abrasion resistance, extending service life 3-5x.

*Optional chrome plating enhances surface hardness and wear resistance.

For Deformation: Robust construction + precision machining.

*Drum roundness controlled within ≤0.02mm ensures smooth operation and reduces vibration.

*Custom flanges and connections improve installation stability, preventing stress deformation.

3. Key Benefits: Cost Reduction & Enhanced Reliability

Longer Life: Durable design extends replacement cycles, cutting part and maintenance costs.

Higher Efficiency: Minimizes clogging and downtime, boosting black liquor extraction and alkali recovery.

Custom Fit: Tailored to paper grade, black liquor properties, and equipment model.

Lower Costs: Reduces production losses, labor expenses, and downstream wear.

4. Industry Application & Support

Successfully deployed in major pulp and paper mills, compatible with rotary drum extractors and pressure screens. Proven stable performance in straw, wood, and reed pulp lines.

End-to-End Service: Site assessment → Solution design → Custom manufacturing → Installation → After-sales support.