Name: Decanter Centrifuge: Principles, Structure, Comprehensive Technical Parameters, and Global Promotion Guide
Brand: Jiangsu Longdai Environmental Protection Group Co., Ltd.
SKU: LW
Price: 20,000.00 USD
Availability: InStock

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Decanter Centrifuge: Principles, Structure, Comprehensive Technical Parameters, and Global Promotion Guide

Product Details:

Place of Origin:	China
Brand Name:	Longdai
Model Number:	LW
Document:	Long Dai Water Treatment Eq...ue.pdf

Payment & Shipping Terms:

Minimum Order Quantity:	1Set
Price:	15000USD-25000USD
Packaging Details:	Wooden or customized
Delivery Time:	30 working days
Payment Terms:	L/C,D/A,D/P,T/T,Western Union,MoneyGram
Supply Ability:	100Set Per Month

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Detailed Product Description

Bearing:	FAG Or SKF	Centrifuge Type:	Decanter Centrifuge
Service Provided:	Technical Support Is Available	Processing:	Separator Centrifuge
Low Energy Consumption:	Optimized Hydraulic/mechanical Back Drive Reduces OPEX By ≤25% Vs. Conventional Models	Triple-Phase Separation:	Precision Separation Of Solids/oil/water From Complex Sludges (up To 99% Liquid Recovery)
Discharge Type:	Scroll Discharge	Easy Maintenance:	Quick Disassembly And Cleaning
Highlight:	Decanter centrifuge technical parameters , Decanter centrifuge structure guide , Decanter centrifuge global promotion

1.1 What is a Decanter Centrifuge?

A decanter centrifuge, fully termed as "Horizontal Screw Discharge Sedimentation Centrifuge," is a mechanical device that uses high-speed rotation to generate centrifugal forces for continuous solid-liquid separation. It does not require filter cloths or screens, relying instead on the density difference between solid and liquid phases to achieve sedimentation separation. The built-in screw conveyor continuously discharges settled solids.

Decanter centrifuges are widely used in global water treatment, mining, chemical, food processing, and oil drilling industries for sludge dewatering, product clarification, particle classification, and material recovery processes.

1.2 Core Working Principle (Five-Step Process)

Step	Description
① Feeding	The feed suspension enters the screw distributor's internal distribution chamber through a fixed feeding tube.
② Acceleration	Material is evenly distributed into the bowl cavity via the distribution port and quickly accelerated to near-bowl speed.
③ Sedimentation	Under strong centrifugal force, denser solid particles adhere to the inner wall of the bowl while the liquid forms an inner ring layer.
④ Solid Discharge	The screw conveyor, operating at a differential speed (slightly slower or faster than the bowl), pushes the settled sludge toward the drying zone at the conical end for discharge.
⑤ Liquid Discharge	Clarified liquid overflows from the adjustable weir plate at the cylindrical end of the bowl or is discharged under pressure by a centripetal pump.

The entire process operates continuously without requiring shutdown for cleaning.

1.3 Key Structural Components and Their Functions

Component Name	Function Description
Bowl	A cone-cylinder composite rotating body providing the centrifugal field, it is the core component for separation.
Screw Conveyor	Coaxial with the bowl but with a differential speed, it pushes settled sludge to the discharge outlet.
Differential Gearbox	Achieves stable differential speed between the bowl and screw; commonly uses planetary gears or hydraulic drives.
Feed Tube	Fixed central tube directing material into the screw distribution chamber.
Weir Plate	Adjusts the depth of the liquid pool, affecting the clarity of the liquid phase and the dryness of the cake.
Bearing Housing & Main Shaft	Supports high-speed rotating components, requiring precise dynamic balancing.
Machine Shell & Base	Provides sealing protection, collects the liquid phase, and guides solid discharge.
Drive System	The main motor drives the bowl, while an auxiliary motor (or hydraulic motor) controls the differential speed.
Control System	PLC + VFD for speed, differential speed, torque monitoring, and automatic adjustment.

1.4 Four Major Technical Advantages of Decanter Centrifuges

Advantage One: Continuous Automatic Operation

Automatic feeding, automatic sludge discharge, automatic adjustment of differential speed.
Can be integrated into DCS/SCADA systems for unmanned operation.

Advantage Two: High Separation Precision

Separation factors up to 3000–4500 G.
Capable of separating particles as small as 2–5 μm.
Solids content in the liquid phase can be controlled below 500 mg/L.

Advantage Three: Broad Material Adaptability

Feed solid content: 0.1% – 40%.
Temperature range: -20°C – 150°C (with special seals).
pH value: 2 – 13 (matching corresponding materials).

Advantage Four: Low Operational Maintenance Costs

No need for filter cloth consumption, no wash water usage.
Wear parts (wear-resistant tiles, bearings) replacement cycle: 8000–12000 hours.
Energy consumption: 0.4–1.2 kWh/m³.

1.5 Comparison of Decanter Centrifuges vs Other Solid-Liquid Separation Equipment

Comparison Item	Decanter Centrifuge	Belt Filter Press	Plate and Frame Filter Press	Screw Press
Operating Mode	Continuous automatic	Continuous	Batch	Continuous
Manual Intervention	Minimal	Moderate	High	Low
Wash Water Consumption	None	High	Moderate	Very Low
Cake Dryness (%)	18–30	15–22	25–40	15–22
Liquid Clarity	Excellent	Good	Excellent	Fair
Footprint	Moderate	Large	Large	Small
Suitable Solid Content (%)	0.1–40	1–8	2–15	0.5–10

2.1 Basic Technical Parameter Range

Parameter Item	Small Size	Medium Size	Large Size
Bowl Diameter (mm)	200–350	400–550	600–800
Length-to-Diameter Ratio (L/D)	3.0–4.0	3.5–4.5	3.5–4.5
Bowl Length (mm)	600–1400	1400–2500	2400–3600
Maximum Speed (rpm)	4000–5000	3000–4000	2200–3200
Maximum Separation Factor (G)	3500–4500	2800–3800	2200–3200
Differential Speed (rpm)	0.5–30	0.5–30	0.5–25
Main Motor Power (kW)	7.5–22	30–75	90–200
Auxiliary Motor Power (kW)	3–7.5	7.5–22	22–55
Typical Capacity (m³/h)	2–15	10–60	50–180
Total Weight (t)	1.0–2.5	2.5–6.0	6.0–15.0

2.2 Performance Parameters (Under Typical Conditions)

Performance Indicator	Municipal Sludge	Industrial Wastewater	Chemical Slurry	Food Processing
Feed Solid Content (%)	1–5	0.5–10	5–30	1–15
Cake Solid Content (%)	20–28	18–30	25–40	20–35
Liquid SS (mg/L)	300–800	500–1500	200–1000	200–500
Solid Recovery Rate (%)	≥95	≥90	≥96	≥94
Flocculant Dosage (kg/t DS)	3–6	2–8	1–5	1–4

2.3 Material Configuration Options

Configuration Level	Bowl Material	Screw Material	Wear Protection	Suitable Application Scenarios
Economy	304 Stainless Steel	304 Stainless Steel	None	Low wear, low corrosion
Standard	316L Stainless Steel	316L Stainless Steel	Weld overlay in feed area	Municipal wastewater
Abrasion Resistant	316L + Wear Layer	Tungsten Carbide Tiles	Replaceable full-screw segments	Mining, dredging, sand-containing
Corrosion Resistant	Duplex Steel 2205/2507	Duplex Steel + Weld Overlay	Optional	Chemicals, seawater, high chloride
Sanitary	304 Mirror Finish	304 Polished	None	Food, pharmaceuticals, beverages

2.4 Electrical and Control System Parameters

Item	Specification
Control Method	PLC (Siemens/Schneider/ABB or equivalent)
HMI	7–12 inch color touchscreen
Drive Method	Dual VFD control for main and auxiliary motors
Differential Speed Control	Constant differential speed / constant torque options
Monitoring Parameters	Main motor current, auxiliary motor current, bowl speed, differential speed, vibration values, bearing temperature
Alarm Protection	Over-torque shutdown, over-vibration shutdown, over-temperature alarm, motor overload
Communication Protocols	Modbus RTU/TCP, Profibus DP, Ethernet/IP, Profinet
Electrical Certification	CE, UL, CSA optional
Explosion Proof Rating	ATEX Ex d IIB T4 optional

2.5 Interface and Installation Dimensions Reference

Model	Feed Port (mm)	Discharge Port (mm)	Sludge Outlet (mm)	Dimensions (L×W×H m)
Small	DN40–50	DN100–150	150×200	2.0×1.0×1.2
Medium	DN50–80	DN150–200	200×250	3.5×1.5×1.5
Large	DN80–125	DN200–300	300×350	5.0×2.0×1.8

Decanter Centrifuge: Principles, Structure, Comprehensive Technical Parameters, and Global Promotion Guide 0

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Decanter Centrifuge: Principles, Structure, Comprehensive Technical Parameters, and Global Promotion Guide

Decanter Centrifuge: Principles, Structure, Comprehensive Technical Parameters, and Global Promotion Guide

Decanter centrifuge technical parameters

Decanter centrifuge structure guide

Decanter centrifuge global promotion

1.1 What is a Decanter Centrifuge?

1.2 Core Working Principle (Five-Step Process)

1.3 Key Structural Components and Their Functions

1.4 Four Major Technical Advantages of Decanter Centrifuges

1.5 Comparison of Decanter Centrifuges vs Other Solid-Liquid Separation Equipment

2.1 Basic Technical Parameter Range

2.2 Performance Parameters (Under Typical Conditions)

2.3 Material Configuration Options

2.4 Electrical and Control System Parameters

2.5 Interface and Installation Dimensions Reference

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