Decanter Centrifuge for Clarifying Separating

• Customization: Available
• Type: Centrifuge
• Separation Mode: Sedimentation Type
• Model NO.: LW
• Operating Type: Continuous Type
• Installation: Horizontal
• Centrifuge Type: Horizontal Spiral Centrifuge
• Pressure: Low Pressure
• Condition: New
• Material: SS304 or SS316 L
• Motor: ABB
• Inverter: ABB
• Touch Screen: Siemens
• Transport Package: Wooden Cases
• Specification: 2065*1050*800
• Trademark: Shenzhou
• Origin: China
• HS Code: 8421192000
• Production Capacity: 500sets
• Package Size: 130.00cm * 90.00cm * 160.00cm
• Package Gross Weight: 1050.000kg

Product Description

 

Decanter centrifuge, horizontal solid bowl decanter centrifuge, separates continuously solid materials from liquids in the suspension, or to separate two liquid phases from each other simultaneous removal of solids. Decanter centrifuges have been widely used for continuous separation of suspended solids from liquids, clarification of solids, classification of fine particles, etc.

According to the purpose of use, decanter centrifuges can be divided into the following three categories, Clarifying Decanter Centrifuge, Separating Decanter Centrifuge, Classifying Decanter Centrifuge.

Clarifying Decanter Centrifuge

Dewatering processing for maximum concentration of solids, or concentrating for the concentration of solids.

Separating Decanter Centrifuge

Separating decanter for separating two liquid phases from each other simultaneous removal of solids.

 

 

Classifying Decanter Centrifuge

Classifying decanter for the extraction of different solid fractions that have different particle size or density.

 

How Does a Decanter Centrifuge Work?

A decanter centrifuge works by exerting a high centrifugal force on the slurry of solids and liquids. A rotating conveyor pushes out the heavier solids that settle on the decanter wall. The lighter liquid exits the decanter through the liquid outlet port on the other end of the bowl.

Continuous process decanter centrifuges can process a large volume of fluids with sludge. Centrifugal force (upwards of 3,000 g) causes graded settling and separates the fluid from small sediment (50µ).

The rotating bowl has a concentric scroll that rotates at a differential speed to that of the decanter bowl. This speed differential allows the scroll to transfer the separated sludge.

The separation of fluid from the sludge occurs inside the rotating decanter bowl. One can explain the internal working as follows.

• Feed Introduction: The slurry is fed into the machine through an axial feed tube, injecting it into the conveyor. The tube conveys the slurry to the center of the conveyor feed chamber.
• Acceleration / Dispersal: The injected slurry strikes against an accelerator in the conveyor feed zone. This action accelerates the flow outward through the feed ports into the bowl, forming a 'pond.'
• Separation: The solids of higher density displace the liquid and settle to the bowl's wall. The conveyor continuously scrolls the solids up the angled conical part (beach).
• Auger Rotation: The bowl-mounted gearbox causes a differential rotation between the conveyor and the bowl.
• Sludge Discharge: The flights push the separated sludge up the bowl's conical part (beach). The solids exit the bowl through 360° discharge ports at the rear end.
• Fluid Discharge: The clarified liquid rises to the pond's surface and flows over the dams in the front bowl hub. At this point, the liquid discharges from the bowl.
• Decanter Bowl Speed: The bowl speed or RPM signifies the effective centrifugal force generated by the decanter. Depending on the fluid and type/density of solids, the centrifugal force is the key factor affecting performance.
• Auger or Conveyor Speed: The relative rotation of the auger versus the bowl relates to the speed at which the separated sludge is conveyed out of the bowl. High sludge content applications require a fast conveyor speed to maximize efficiency.
• Pond Depth: The thickness of the fluid layer formed around the bowl's inner wall is the pond depth. Deeper ponds lead to clearer centrate and wetter solids. Shallower ponds lead to dryer solids and murkier centrate.
  Weir plate adjustments allow pond depth changes. Example weir plates are shown below.
• Beach Angle: The angle of the conical part of the bowl is known as the beach angle. Varying the beach angle has a direct impact on the separated sludge dryness.
• Conveyor Pitch: The distance between the conveyor flights is the conveyor pitch. A shorter pitch enhances the decanter's solids' separation capacity and increases the torque on the gearbox.

 

 

Decanter centrifuges are available in 2 configurations, namely 2-phase and 3-phase. In other words, solid-liquid and solid, liquid, liquid separation.

The two-phase separator is a solid-liquid separator. In other words, it separates the fed slurry into a solid phase and one liquid phase.

Most de-sludging duties use a two-phase design. These include industrial sludge thickening, municipal wastewater, hemp biomass separation, etc.

A 3-phase type separates solids from 2 immiscible fluids. In other words, a 3-phase decanter centrifuge produces a solid phase and two separate liquid phases.

For example, a 3-phase configuration separates crude oil from tank bottom sludge and water. Olive oil separation from water and biomass is another example.

Advantages of the Decanter Centrifuge

Continuous production, closed operation, high degree of automation.

Good for greasy sludges. The Decanter Centrifuge is excellent for dewatering or separation of fats, oils and greases.

Large capacity in small space. The Centrifuge can offer a large solids handling capacity in a very small space. This is advantageous in large plants.

With lower capture or high polymer dosage rate, can sometimes achieve higher cake solids than the belt press filter. One reason for this is the large amount of shearing as the sludge is moved through the machine, and the temperature increase in the sludge from the power energy dissipated. Increasing temperature improves dewatering. High G force centrifuges can create cell lysis and this releases extra liquid, but these liquids are high in odour, some of which is retained.

 

Typical Applications of Decanter Centrifuge

   1.    industrial and municipal wastewater treatment    2.    oil&gas drilling mud/fluid control    3.    washing, separation and dewater of starch 

   4.    mycelium and zymtotic fluid separation for antibiotic    5.    dewatering of soybean and wheat protein    6.    dewatering of fish power and fish meat

   7.    dewatering  of vinasse    8.    clarification and extraction of fruit juice    9.    separation and purification for animal and vegetable oil

  10.production and purification of olive oil, palm oil, avcado oil   11.separation and purification for coal tar   12.grading  of kaolin and grapgite

  13.grading and dewatering  of dyestuff and pigment   14.froth flotation for cleaned coal and dewatering of coal mud   15.grading  and dewatering of minerals

 

 

 

Model	Technical parameter					motor power		outline dimension(mm)	Machine weight (KG)
	(Diameter)mm	Rotation speed rpm	Length mm	Separation factor G	capacity M3/h	Main motor KW	Vice motor KW	Dimension: L×D×H
LW250×1000	250	3600	1000	1813	1-3	7.5/11	4/5.5	2065×1050×800	1100
LW360×1200	360	3500	1200	2467	3-8	11/18.5	7.5/11	2600×1500×850	1900
LW360×1500	360	3500	1500	2062	3-8	11/18.5	7.5/11	2800×1400×850	2000
LW420×1750	420	3200	1750	2406	4-20	30/37	11/18.5	3120×1580×1050	3000
LW450×1600	450	3200	1600	2578	5-25	30/45	11/22	3780×1050×1180	3500
LW450×1800	450	3200	1800	2578	5-25	30/45	11/22	3985×1050×1180	3600
LW450×2000	450	3000	2000	2266	5─25	30/45	11/22	4320×1050×1180	3800
LW500×1800	500	3000	1800	2517	10-30	37/55	15/22	4200×1110×1200	4300
LW500×2100	500	3000	2100	2517	10-30	37/55	15/22	4500×1110×1200	4500
LW550×1800	550	3000	1800	2769	10-35	45/55	18.5/22	4380×1160×1230	4800
LW550×2200	550	2800	2200	2412	10-35	45/55	18.5/30	4780×1160×1230	5000
LW650×1750	650	2000	1750	1454	20-50	75/90	30/37	4576×1300×1250	6000
LW650×2000	650	2000	2000	1454	20-50	75/90	30/37	4900×1300×1250	6200
LW800×2000	800	1800	2000	1450	40-100	90/110	45/55	6052×1460×2100	10000
LW1000×2350	1000	1600	2350	1432	50-140	110/132	55/75	6850×1860×2300	12800