Analysis and Solutions for Decreased Screening Efficiency in Airflow Sieves – Technical Guide by Win-Win Machinery
As a professional manufacturer with over 10 years of experience specializing in the R&D and production of airflow sieves, Win-Win Machinery draws on hundreds of on-site cases to systematically analyze the common causes behind reduced screening efficiency and offers scientific solutions to help you quickly restore optimal equipment performance.
I. Airflow System Issues (Core Factor)
1. Insufficient Air Pressure / Air Volume
Typical Symptoms: Lower material suspension height, material accumulation on the screen surface
Possible Causes:
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Blower model is undersized or performance is degraded
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Air leakage in pipelines (due to aging or damaged flange seals)
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Filter or dust collector blockage, causing increased system resistance
Solutions:
▶️ Check whether the blower current reaches its rated value
▶️ Use an anemometer to measure pipeline airflow speed (should be ≥15 m/s)
▶️ Replace sealing strips and clean or replace filter components
2. Uneven Airflow Distribution
Typical Symptoms: Local accumulation of material on the screen, fluctuating classification accuracy
Possible Causes:
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Deformation or misalignment of the guide vanes
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Design flaws in the air inlet structure
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Blocked screen mesh altering airflow path
Solutions:
▶️ Use a smoke generator to trace airflow paths
▶️ Adjust guide vane angle to the optimal 30–45° (customized guide vanes available through Win-Win’s patented design)
▶️ Adopt a stepped airflow distribution system
II. Screening System Issues
1. Abnormal Screen Mesh Condition
Typical Symptoms: Sharp drop in fine powder throughput, yield decreased by more than 30%
Key Data Table:
| Mesh Condition | Standard Aperture | Actual Measurement | Action Required |
|---|---|---|---|
| New Mesh | 200 mesh / 200 ± 5μm | – | – |
| Worn Mesh | 200 mesh / 230–250μm | Replace if >10% deviation |
Solutions:
▶️ Inspect screen openings monthly using a laser particle size analyzer
▶️ Use Win-Win’s customized edge-sealed mesh (2–3 times longer lifespan)
2. Material Property Changes
Typical Cases:
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A quartz powder client experienced a 42% output drop due to an increase in moisture content from 0.5% to 3.2%
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A pharmaceutical powder lost 60% screening efficiency due to static cling
Solutions:
▶️ Install Win-Win’s patented anti-static device (surface resistance < 10⁶Ω)
▶️ Configure a hot air drying system (humidity control accuracy ±1% RH)
III. Operation and Maintenance Issues
Common Mistakes and Correct Practices Comparison
| Mistake | Correct Practice | Impact on Efficiency |
|---|---|---|
| Running continuously for 24 hours without cleaning | Clean the screen every 4 hours | Up to 35% drop in yield |
| Using standard lubricant | Use high-temperature-resistant grease | Bearing lifespan 3× shorter |
| Random blower speed adjustments | Set parameters based on material characteristics | Classification accuracy fluctuates ±20% |
Win-Win Professional Technical Support
For complex working conditions, we offer:
✅ Airflow sieve health check services (including air pressure testing, mesh inspection, motion analysis)
✅ Intelligent control system upgrades (real-time monitoring of airflow, temperature, and output)
✅ Customized machine modification solutions (e.g., explosion-proof, food-grade, nano-material models)
📞 Get Expert Diagnosis Now:
Phone: +86 13523225816
Email: winwinsieve@gmail.com
Bonus: Airflow Sieve Efficiency Self-Check Flowchart
1. Check Air Pressure → 2. Inspect Seals → 3. Examine Screen Mesh → 4. Verify Material Properties → 5. Adjust Parameters
Following this flow, 90% of issues can be resolved independently!