Product Details
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Advanced Solid-Liquid Separation: Horizontal Decanter Centrifuge for Global Environmental Projects

1. Equipment Overview & Core Structure

The Horizontal Decanter Centrifuge is a high-end environmental separation system that utilizes centrifugal force to achieve continuous solid-liquid separation. It is widely deployed in global wastewater treatment, petrochemical processing, food production, and mining engineering.

Core Structural Components

No.	Component	Function
1	Vibration Absorber	Isolates operational vibration for stable running
2	Main Base Frame	Supports total machine weight and provides installation reference
3	Main Motor	Drives bowl at high speed with VFD-controlled variable speed
4	Feed Tube	Introduces slurry into the rotating bowl
5	Conveyor/Scroll	Transports settled solids toward discharge port
6	Bowl	Primary separation chamber with cylindrical-conical composite geometry
7	Weir Plate / Adjustable Ring	Regulates liquid overflow to control separation performance
8	Protective Cover	Fully enclosed design for safety and environmental compliance
9	Bearing Housing	Supports bowl and scroll with precision-grade bearings
10	Differential Gearbox	Precisely controls speed difference between bowl and scroll
11	Liquids Discharge Port	Continuously discharges clarified liquid phase
12	Solids Discharge Port	Continuously discharges dewatered solid cake

2. Working Principle – Detailed Explanation

2.1 Four-Step Continuous Separation Process

Step 1: Feed Acceleration
Slurry enters the rapidly rotating bowl via the feed tube and instantly stratifies under a high centrifugal field (1,500–4,000 G).

Step 2: Solid Sedimentation
Denser solid particles settle against the inner wall of the bowl, forming a compact solids ring; the lighter liquid forms an inner clarified layer.

Step 3: Spiral Conveying
The scroll, operating at a controlled differential speed (2–50 rpm), continuously pushes the settled solids toward the conical end for discharge.

Step 4: Liquid Overflow
Clarified liquid flows axially along channels between scroll flights toward the cylindrical end and exits through adjustable weir plates.

3. Comprehensive Technical Specifications

3.1 Model Specification Matrix

Parameter	Lab Scale	Small Industrial	Medium Industrial	Large Industrial	Extra-Large
Bowl Diameter	220–360 mm	360–450 mm	520–720 mm	800–1,000 mm	1,200 mm
Bowl Length	600–1,200 mm	1,200–1,800 mm	1,800–3,000 mm	3,000–4,200 mm	4,500–5,500 mm
L/D Ratio	2.0–3.0	2.5–3.5	3.0–4.2	3.5–4.5	4.0–5.0
Max Speed	3,500–4,000 rpm	2,800–3,500 rpm	2,000–2,800 rpm	1,600–2,200 rpm	1,400–1,800 rpm
Separation Factor (G)	1,500–3,200 G	1,600–3,000 G	1,800–3,200 G	1,800–3,500 G	2,000–4,000 G
Capacity	0.5–5 m³/h	3–15 m³/h	10–50 m³/h	40–100 m³/h	80–150 m³/h
Main Motor Power	3–7.5 kW	7.5–18.5 kW	22–75 kW	90–160 kW	200–355 kW
Auxiliary Motor Power	1.5–3 kW	3–5.5 kW	5.5–15 kW	18.5–30 kW	37–55 kW
Machine Weight	300–800 kg	1,200–2,500 kg	4,000–8,000 kg	12,000–18,000 kg	22,000–35,000 kg
Dimensions (L×W×H)	1.5×0.8×1.0 m	2.5×1.2×1.3 m	3.5×1.6×1.6 m	5.0×2.2×2.0 m	6.5×2.8×2.4 m

3.2 Material Configuration Options

Application	Bowl Material	Scroll Material	Protection Rating
General Wastewater	Duplex 2205	SS304 hardfacing	IP55
High Chloride Environments	Duplex 2507 / Titanium	2507 + Tungsten Carbide	IP65
Strong Acid Media	Hastelloy C-276	Ceramic Lining	IP65
Food/Pharma	Mirror-polished SS316L	SS316L + PTFE coating	IP65 + 3A Certified
Oil & Gas (Explosive Zones)	Duplex 2205	Tungsten Carbide Hard Alloy	Ex d IIB T4

4. Global Application Areas

4.1 Municipal & Industrial Environmental Applications

Industry	Feed Material	Feed Solids (%)	Cake Moisture (%)	Capacity (m³/h)
Municipal WWTP	Waste Activated Sludge	0.5–1.5%	75–82%	10–80
Pulp & Paper	Deinking Sludge / Effluent	2–8%	70–78%	15–60
Textile Dyeing	Dye Sludge	1–4%	72–80%	8–40
Leather Tanning	Chrome-Bearing Sludge	3–10%	65–75%	5–30
Electroplating	Heavy Metal Sludge	2–6%	70–78%	3–25

4.2 Oil & Gas Industry – Tricanter (3-Phase) Systems

Parameter	Specification
Applicable Feed	Tank bottom sludge, pit oil sludge, refinery “three sludges”
Operating Temperature	60–90°C (adjustable)
Oil Recovery Rate	≥92%
Residual Oil in Solids	≤2%
Oil Content in Effluent	≤100 mg/L
Unit Capacity	5–40 m³/h

4.3 Food & Bioengineering

Application	Separation Goal	Special Configuration
Vegetable Oil Extraction	Oil/water/solid tricanter separation	Food-grade materials, steam heating
Juice Clarification	Removal of pulp, fibers, pectin	Sanitary design, CIP cleaning
Beer Yeast Recovery	Yeast cell harvesting	Low-temperature operation, high viability
Biopharmaceuticals	Biomass collection, protein purification	Sterile design, GMP compliant
Starch Processing	Gluten concentration, starch washing	Multi-stage counter-current washing

5. Comparative Technical Advantages

5.1 Performance Comparison vs. Traditional Dewatering Technologies

Criteria	Decanter Centrifuge	Plate-Frame Press	Belt Press	Screw Press
Continuous Operation	✓ 24/7	✗ Batch only	✓	✓
Footprint	Compact (baseline)	3–5× larger	1.5×	0.8×
Operators Required	1 (monitoring)	2–3 (manual unloading)	1–2	1
Polymer Dosage	Low (0–3 kg/ton DS)	High (4–8 kg/ton DS)	Medium (2–5)	Medium (2–4)
Consumables	No filter cloth; long-life wear parts	Frequent cloth replacement	Belt replacement	Ring plate wear
Moisture Stability	±2%	±5%	±3%	±3%
Wash Water Use	Minimal (self-cleaning)	High (cloth rinse)	Medium	Low
Noise Level	≤75 dB(A)	≤85 dB(A)	≤80 dB(A)	≤72 dB(A)
Installation Height	Low (no platform needed)	High (discharge platform)	Medium	Low

6. Intelligent Control System

6.1 Automation Tiers

Standard Tier

PLC logic control with HMI touchscreen
Real-time display of speed, differential, torque
Fault alarms and automatic shutdown protection

Advanced Tier

Automatic feed flow regulation
Load-adaptive differential speed optimization
Online monitoring of bearing temperature & vibration

Intelligent Tier

Cloud-based remote monitoring & diagnostics
Mobile app for real-time data access
Predictive maintenance algorithms
Digital twin simulation for process optimization

7. International Certifications & Compliance

Certification	Standard	Scope
Machinery Directive	2006/42/EC (MD)	EU market access
Pressure Equipment Directive	2014/68/EU (PED)	Pressurized components
ATEX	2014/34/EU	Zone 1/21 explosive atmospheres
IECEx	IECEx 02	Global explosion safety recognition
NEC	Article 500/505	North American hazardous locations
FDA	21 CFR 177.1550	US food-contact compliance
EU Food Contact	EC 1935/2004	European food safety
3-A Sanitary	3-A Standards	Dairy & beverage industry
China Explosion Proof	GB 3836 / Ex d IIB T4	Domestic market
Eurasian Conformity	GOST-R / EAC	Eurasian Economic Union

8. Technical Selection Guide

8.1 Essential Process Data Required

☑ Material type & source (detailed composition)
☑ Required capacity (m³/h or tons dry solids/day)
☑ Feed solids concentration (% w/w or mg/L)
☑ Particle size distribution (d10/d50/d90)
☑ Solid-liquid density difference (g/cm³)
☑ Feed temperature & pH
☑ Target cake moisture (%)
☑ Liquid clarity requirement (SS removal rate)
☑ Installation environment (indoor/outdoor/hazardous area)
☑ Altitude & power supply specifications

8.2 Key Sizing Formulas

Separation Factor (G):
$$ G = frac{r cdot omega^2}{g} = frac{r cdot (2pi n / 60)^2}{9.81} $$
Where:

( G ): Separation factor (dimensionless)
( r ): Bowl radius (m)
( n ): Rotational speed (rpm)
( g ): Gravitational acceleration (9.81 m/s²)

Capacity Estimation:
$$ Q = k cdot D^2 cdot L cdot G^{0.5} cdot frac{Deltarho}{mu} $$
Where ( k ) is a material-specific coefficient determined by lab testing.

9. Global Service Network

9.1 Technical Support Lifecycle

Phase	Services	Deliverables
Pre-Sale	Lab testing, sizing, process design	Test report + technical proposal
Order Execution	Production tracking, third-party inspection	Photos/videos + inspection certificates
Installation & Commissioning	On-site guidance, no-load/load tests	Commissioning report + operator training
Operational Support	Remote diagnostics, spare parts, maintenance	24h response + 48h on-site service
Upgrade & Optimization	Control system modernization, wear-part retrofit	Upgrade plan + performance validation

9.2 Spare Parts Guarantee

Strategic Spares: Bearings, seals, gearboxes stocked in global warehouses
Wear Parts: Scroll flights, bowl liners – rapid custom fabrication
Electrical Components: PLCs, VFDs, sensors via OEM channels
Emergency Response: Critical spares delivered worldwide within 72 hours by air

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Categories	Decanter Centrifuge
Brand Name:	Longdai
Model Number:	LW
Place of Origin:	China
MOQ:	1Set
Price:	15000USD-25000USD
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
Discharge Type:	Spiral Screw Discharge
Item:	Industrial Separator Centrifuge Machine
Description:	Solid-liquid Separation Machine
Auxiliary Motor Power:	7.5kw
Drum Length:	1720L
Keywords:	fish oil decanter centrifuge
Capacity:	Up to 1000 cubic meters per hour
Power:	30Kw