Jiangsu Longdai Environmental Protection Group Co., Ltd.
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 100Set Per Month |
| Delivery Time | 30 working days |
| Packaging Details | Wooden or customized |
| Material | SS304 |
| Machinery | separation centrifuge |
| Collocation | Double motor with double transduce |
| Weight | 1400 |
| Features | Continuous operation, high efficiency, low maintenance |
| Discharge Type | Spiral Screw Discharge |
| Use | solids control centrifuge |
| Core Components | PLC，Motor, Pressure vessel, Bearing |
| Item | Industrial Separator Centrifuge Machine |
| Description | Solid-liquid Separation Machine |
| Brand Name | Longdai |
| Model Number | LW |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 100Set Per Month |
| Delivery Time | 30 working days | Packaging Details | Wooden or customized |
| Material | SS304 | Machinery | separation centrifuge |
| Collocation | Double motor with double transduce | Weight | 1400 |
| Features | Continuous operation, high efficiency, low maintenance | Discharge Type | Spiral Screw Discharge |
| Use | solids control centrifuge | Core Components | PLC，Motor, Pressure vessel, Bearing |
| Item | Industrial Separator Centrifuge Machine | Description | Solid-liquid Separation Machine |
| Brand Name | Longdai | Model Number | LW |
| Place of Origin | China | ||
| High Light | sludge treatment decanter centrifuge ，efficient decanter centrifuge for cost savings ，environmentally compliant decanter centrifuge | ||
A decanter centrifuge—short for horizontal spiral discharge sedimentation centrifuge—is a solid-liquid separation device that operates on the principle of centrifugal sedimentation.
It consists of:
In environmental applications, it is primarily used to thicken and dewater waste sludge. It can transform liquid sludge with >99% water content into a dewatered cake with <80% moisture—reducing sludge volume by over 90% (10x+ reduction).
| Step | Process Description |
|---|---|
| 1. Feed & Acceleration | Sludge enters via the feed pipe into an acceleration chamber inside the scroll, then is evenly distributed into the rotating bowl. |
| 2. High-Speed Sedimentation | Under intense centrifugal force (up to 4,500× gravity), denser solids rapidly settle onto the bowl wall, forming a solid cake layer; lighter liquid forms an inner ring. |
| 3. Differential Discharge | Due to a small speed difference (typically 1–30 rpm) between the bowl and scroll, the spiral continuously conveys settled solids toward the conical end and discharges them through sludge outlets. |
| 4. Liquid Overflow | Clarified liquid exits continuously through overflow weirs or a centripetal pump (for closed systems), achieving complete solid-liquid separation. |
When engaging overseas clients, emphasize these value propositions:
While initial investment may exceed traditional filter presses, the total cost of ownership (TCO) is significantly lower.
| Cost Factor | Benefit |
|---|---|
| Chemical Consumption | Modern high L/D ratio models reduce polymer (PAM) usage by 5–25% vs. belt presses or older centrifuges. |
| Energy Efficiency | VFD control + regenerative braking systems (feeding braking energy back to the grid) cut power consumption by >16% per unit. |
| Disposal & Transport | Every 1% increase in cake dryness reduces sludge weight and volume—directly lowering landfill, incineration, or transport costs. |
Proven performance across diverse global feedstocks:
Operates stably under fluctuating feed conditions—ideal for real-world industrial environments.
| Parameter | Standard Range | Notes |
|---|---|---|
| Bowl Diameter | 200 mm – 800 mm | Larger diameter = higher capacity |
| Length-to-Diameter Ratio (L/D) | 3:1 – 5:1 | L/D > 4 extends residence time → drier cake & clearer centrate |
| Cone Angle | 10° – 30° | Smaller angle = stronger conveying force (ideal for compressible sludge) |
| Max Rotational Speed | 2,000 – 4,500 rpm | Higher speed = greater G-force |
| Parameter | Standard Range | Explanation |
|---|---|---|
| Separation Factor (G) | 1,000 G – 4,500 G | ( G = frac{text{RPM}^2 times r}{895} ); higher G = better separation |
| Capacity | 0.5 – 250 m³/h | Depends on feed solids %, viscosity, and particle size |
| Feed Solids Concentration | 0.5% – 40% DS | Handles dilute to medium-concentration slurries |
| Solid Recovery Rate | ≥95% – 99.5% | Efficient capture of particles >2 µm |
| Cake Dryness (DS) | 15% – 50%+ | Organic sludge: 15–30%; inorganic/mineral sludge: up to 50%+ |
| Component | Recommended Material / Configuration | Advantages |
|---|---|---|
| Bowl | Duplex Stainless Steel 2205 / SS316L | Excellent corrosion & wear resistance; ideal for high-chloride environments |
| Scroll Conveyor | SS316L + Hardfacing / Ceramic Tiles | Critical wear part; ceramic or tungsten carbide overlay extends service life 3–5x |
| Housing | SS304 | Corrosion-resistant, clean appearance |
| Differential | Planetary Gearbox or Hydraulic System | Gear: robust & simple; Hydraulic: infinite speed control, high torque |
| Bearings | SKF / FAG / NSK (Tier-1 brands) | Ensures stability at high speeds |
| Feature | Specification |
|---|---|
| Drive Type | Dual-motor dual-VFD (industry standard) • Main motor drives bowl • Auxiliary motor or hydraulic unit drives differential |
| Speed Control | Stepless differential speed adjustment via VFD |
| Control System | PLC + HMI touchscreen; supports remote monitoring (vibration, temperature, current) |
| Safety Protection | Mechanical torque arm + electrical overload protection to prevent jam damage |
| Sector | Typical Applications | Recommended Features |
|---|---|---|
| Municipal & Environmental | • WWTP sludge dewatering • Water treatment plant backwash sludge • River/lake dredging slurry | Standard SS316L, L/D ≥4, VFD control |
| Food & Beverage | • Juice clarification • Soy protein isolation • Starch dewatering • Edible oil refining | Hygienic design (3A/Sanitary), easy-clean surfaces |
| Chemical & Energy | • PVC resin dewatering • TiO₂ washing/classification • Carbide slag treatment • Used oil recovery | Corrosion-resistant alloys, explosion-proof options |
| Oil & Gas | • Drilling mud solids control • Oily sludge three-phase separation (oil/water/solids) | ATEX/IECEx certification, hydraulic differential |
| Mining & Minerals | • Kaolin classification • Calcium carbonate dewatering • Coal preparation plant tailings | Heavy-duty wear protection (ceramic tiles), high-torque drive |
In a world accelerating toward carbon neutrality and zero liquid discharge (ZLD), the decanter centrifuge is no longer just an environmental compliance tool—it’s a value-generating production asset.
As a professional water and sludge treatment solutions provider, we offer not only standard decanter centrifuges but also custom-engineered variants, including:
If you’re seeking the most efficient, cost-effective, and future-ready solution for solid-liquid separation, contact us today for a detailed quotation and tailored technical proposal.
Company Details
Business Type:
Manufacturer,Seller
Year Established:
2010
Total Annual:
7000000-8000000
Employee Number:
64~100
Ecer Certification：
Verified Supplier
Jiangsu Longdai Environmental Protection Group Co., Ltd. is an environmental protection equipment manufacturer with more than 15 years of experience. It has provided a large number of sophisticated environmental protection equipment at home and abroad, established three br... Jiangsu Longdai Environmental Protection Group Co., Ltd. is an environmental protection equipment manufacturer with more than 15 years of experience. It has provided a large number of sophisticated environmental protection equipment at home and abroad, established three br...
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