Technical Specifications
Yixing Feiran DL Series Volute Screw Press — manufactured by our partner facility with 15+ years of dewatering equipment production experience. Real factory data, not estimates.
| Model | DS Capacity (Low→High) |
Sludge @2000mg/L | Sludge @5000mg/L | Sludge @10000mg/L | Sludge @20000mg/L | Sludge @30000mg/L | Sludge @50000mg/L |
|---|---|---|---|---|---|---|---|
| DL-101 | ~3–6 kg/h | ~1.5 m³/h | ~1.0 m³/h | ~0.6 m³/h | ~0.3 m³/h | ~0.2 m³/h | ~0.12 m³/h |
| DL-201 | ~9–20 kg/h | ~4.5 m³/h | ~3.5 m³/h | ~2.0 m³/h | ~1.0 m³/h | ~0.6 m³/h | ~0.4 m³/h |
| DL-202 | ~18–40 kg/h | ~9.0 m³/h | ~7.5 m³/h | ~4.0 m³/h | ~2.0 m³/h | ~1.3 m³/h | ~0.8 m³/h |
| DL-301 | ~30–60 kg/h | ~15 m³/h | ~11 m³/h | ~6.0 m³/h | ~3.0 m³/h | ~2.0 m³/h | ~1.2 m³/h |
| DL-302 | ~60–120 kg/h | ~30 m³/h | ~20 m³/h | ~12 m³/h | ~6.0 m³/h | ~4.0 m³/h | ~2.4 m³/h |
| DL-303 | ~90–180 kg/h | ~45 m³/h | ~32 m³/h | ~18 m³/h | ~9.0 m³/h | ~6.0 m³/h | ~3.6 m³/h |
| DL-352 | ~120–200 kg/h | ~60 m³/h | ~24 m³/h | ~20 m³/h | ~10 m³/h | ~8.0 m³/h | ~4.0 m³/h |
| DL-353 | ~180–300 kg/h | ~90 m³/h | ~36 m³/h | ~30 m³/h | ~15 m³/h | ~12 m³/h | ~6.0 m³/h |
| DL-403 | ~270–450 kg/h | ~135 m³/h | ~100 m³/h | ~45 m³/h | ~22.5 m³/h | ~15 m³/h | ~9.0 m³/h |
Notes: DS capacity range shows low-concentration to high-concentration sludge throughput. Actual capacity depends on sludge characteristics, polymer dosage, and operating conditions. All data from factory test reports.
Key Performance Features
- Low-concentration direct dewatering — reduces civil construction costs
- Self-cleaning design — fixed and moving rings replace filter cloth, no clogging, handles oily sludge
- Ultra-low energy — only 1/8 of belt press, 1/20 of centrifuge power consumption
- Fully automatic operation — minimal operator attention required
- Low noise — suitable for indoor installation (<65 dB)
- Compact footprint — 50% smaller than equivalent belt press
Applications
- Municipal wastewater treatment plants
- Food & beverage industry
- Chemical & pharmaceutical plants
- Paper & textile mills
- Oil field & petrochemical
- Electroplating & mining
- Livestock & restaurant wastewater
Frequently Asked Questions
What polymer consumption should I expect?
Typically 1–3 kg/tDS (dry solids). Our engineers optimize dosage based on your specific sludge analysis. For municipal sludge, PAM consumption is usually 1.5–2.5 kg/tDS.
How does the self-cleaning mechanism work?
The volute screw design uses alternating fixed and moving rings. As the screw shaft rotates, the moving rings undergo slight axial displacement, continuously cleaning the gaps between rings. This prevents clogging without high-pressure spray washing, saving 90% of wash water.
What maintenance is required?
Quarterly bearing lubrication and annual seal inspection. Bearing service life exceeds 50,000 hours. The self-cleaning design dramatically reduces routine maintenance compared to belt presses or centrifuges.
Can it handle variable sludge conditions?
Yes. The DL series effectively processes sludge with MLSS from 2,000 to 50,000 mg/L. Screw speed and overflow weir are adjustable to optimize performance across varying conditions.
What certifications do you have?
ISO 9001:2015 certified. CE marking available on request. We also provide third-party inspection reports from SGS/BV.
What is the typical cake dryness?
18–25% for municipal sludge, up to 30–35% for certain industrial sludges, depending on feed characteristics and polymer optimization.
Comprehensive Technical Specifications
| Model | Capacity (kg DS/h) | Motor (kW) | Polymer (kg/t DS) | Cake Solids (%) | Dimensions L×W×H (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| DL-101 | 2-5 | 0.4 | 2-4 | 20-30 | 1760×800×1200 | 280 |
| DL-201 | 5-10 | 0.75 | 2-4 | 20-30 | 2260×900×1300 | 450 |
| DL-202 | 10-20 | 1.5 | 2-5 | 20-30 | 2510×1060×1440 | 680 |
| DL-301 | 20-40 | 2.2 | 3-5 | 20-30 | 2920×1200×1540 | 950 |
| DL-302 | 40-65 | 3.0 | 3-5 | 20-30 | 3220×1340×1640 | 1,350 |
| DL-303 | 65-90 | 4.0 | 3-5 | 20-28 | 3520×1480×1740 | 1,800 |
| DL-401 | 90-140 | 5.5 | 3-5 | 20-28 | 3820×1620×1840 | 2,500 |
| DL-402 | 140-200 | 7.5 | 3-6 | 20-28 | 4120×1760×1940 | 3,300 |
| DL-403 | 200-300 | 11 | 3-6 | 20-28 | 4520×1900×2040 | 4,800 |
Operating Conditions:
- Feed sludge concentration: 2,000-50,000 mg/L (0.2-5% DS)
- Operating temperature: 5-50°C
- Power supply: 380V/50Hz (415V/60Hz optional)
- Spray water: Near zero — self-cleaning volute design
- Material: SS304 body, SS316L screw shaft optional
- Control: PLC automatic with variable speed drive
Verified Factory Specifications — Data based on municipal mixed sludge testing. Contact engineering for project-specific performance guarantees.
Regional Applications & Compliance
Saudi Arabia & GCC
- Desalination plant sludge: High-salinity sludge from SWRO pre-treatment — SS316L construction standard
- Municipal sludge pre-drying: Screw press cake at 25-30% solids feeds directly into thermal dryers
- Zero spray water: Critical for water-scarce GCC region — saves 5-10% of plant water consumption vs belt press
- Enclosed design: No odor emission — suitable for indoor installation in urban WWTPs
Indonesia
- POME sludge dewatering: Largest application segment — handles oily/greasy sludge without clogging
- Tropical operation: Fully enclosed design prevents rainwater dilution of sludge cake
- Remote palm oil mills: Low operator skill requirement, minimal maintenance, automated operation
- Compact footprint: Vertical installation option saves 40% floor space
Vietnam
- Food processing sludge: Seafood, rice milling, beverage — high FOG content handled without belt tracking issues
- Textile industry: Oily and colored sludge from dyeing and finishing processes
- Industrial zones: Centralized sludge dewatering for multiple factories
- QCVN 40 compliance: Dewatered cake enables proper sludge disposal per Vietnamese regulations
Screw Press FAQ
Q: What’s the difference between DL and standard volute series?
A: Our DL series features optimized volute ring spacing and reinforced screw shafts, providing 15-20% higher throughput and 5% better cake dryness than standard designs.
Q: Can the screw press handle mixed sludge (primary + waste activated)?
A: Yes. The DL series handles a wide range of sludge types. For WAS-only sludge at low concentration (<1% DS), we recommend the DL-201 minimum with enhanced flocculation system.
Q: What maintenance is required?
A: Minimal. Annual inspection of screw shaft wear rings, monthly polymer system check, quarterly gearbox oil change. No belt replacement or daily adjustments needed.