Industrial Scale Centrifuge From China Sehnzhou

• Customization: Available
• After-sales Service: 24 Hours
• Warranty: 12monthes
• Model NO.: LW
• Type: Centrifuge
• Object: Solid Liquid or Liquid-Liquid or Liquid-Liquid
• Separation Mode: Filter Type
• Operating Type: Continuous Type
• Installation: Horizontal
• Centrifuge Type: Decanter Centrifuge
• Pressure: Medium Pressure
• Condition: New
• Material: SS304 or SS316 L
• Machine Name: Lw Decanter Centrifuge for Sludge Dewatering
• Motor: ABB
• Inverter: ABB
• Transport Package: Wooden Cases
• Specification: 2065*1050*800
• Trademark: Shenzhou
• Origin: Zhejiang
• HS Code: 8421192000
• Production Capacity: 500sets
• Package Size: 130.00cm * 90.00cm * 160.00cm
• Package Gross Weight: 1050.000kg

Product Description

 

A decanter centrifuge, also known as a horizontal bowl centrifuge, solid bowl centrifuge or scroll centrifuge, is a machine used to separate a solid material from a liquid(s) using a high-speed and continual rotational process. While wastewater treatment of biosolids is a primary application, the separation of one solid material from one liquid (2-phase dewatering) in a slurry is also important for a number of industries including chemical, food, oil, and mining to name a few.

 

The separation of a solid and liquid(s) in a decanter centrifuge system work on the principle of gravitational forces. Whereas it takes considerable time for the gravitational separation of a muddy mixture (to fall to the bottom) and water (to rise to the top) in separation technologies based on 1xG separation such as,a static container, clarifier or lamal separator, the rapid rotation of a centrifuge greatly speeds up this gravitational principle.

In fact, the G-force generated by a decanter centrifuge can be well in excess of three-thousand times greater than gravity reducing the separation process from hours to mere seconds. Today's centrifuges are a counter-current type technology. The separation process in a 2-phase decanter centrifuge results in the denser solid particles to be compacted and settled out in the inner drum and then transported and removed via solids discharge end of the decanter. The centrate is routed to the opposite end of the centrifuge and removed via the centrate outlet. In a 3-phase centrifuge, the baffle system is built inside the centrifuge. The baffle system blocks the oil from being discharged with the water. The oil (the lighter phase fluid) is collected between the two baffles and skimmed off the top.
 

 

The basic operation includes the following centrifuge parts and how they function:

1. The feed material enters the centrifuge via the feed pipe inlet on one end of the centrifuge
2. Due to centrifugal force, the heavier particles are pushed through the liquid and collected on the inner wall of the bowl; the high speed rotation of the bowl separates the solids and liquid materials
3. The continuous rotation of the bowl can be accomplished by a VFD (Variable Frequency Drive)
4. The scroll conveyor (scroll) inside the bowl rotates at a slightly different speed than the bowl (differential speed)
5. The scroll conveyor continuously scrapes the solids off the inner bowl wall and moves the solids in the direction of the centrifuge conical's solids discharge area
6. The liquid (centrate) moves in the opposite direction from the solids due to Pascal's Law (or a system of combined piping) and because the solids discharge end is sealed by the solids
7. The differential speed of the centrifuge controls the solids retention time; the longer the solids are under g-force the drier the solids become in the dewatering process

SHENZHOU decanter centrifuges help you with solid-liquid separation within one single continuous process. Stand out from the competition with high performance separation that results in extracted / clarified products of excellent quality and higher commercial value. Make a difference as you recover valuable raw materials, reduce energy consumption and lower footprint and waste management costs with our industrial decanter centrifuge machines and services.

Solid-liquid separation is a common manufacturing process in countless industries, and shenzhou has over 60 years of experience using decanter centrifuges to meet this requirement. Decanter centrifuge operation makes use of centrifugal force - the effect can be up to 4000 times greater compared to using gravitational forces.

 

shenzhou uses high-grade stainless steel for all parts in contact with the solid-liquid separation process to prevent corrosion. High-stress rotating components are machined from high-strength centrifugally cast stainless steel, ensuring uniform, flaw-free castings and weld-free components for maximum strength, reliability, and long service life. Wear-prone areas, such as the feed zone, solids discharge output zone, bowl, and scroll, are protected by abrasion-resistant materials tailored to each industrial process. Continual refinement of the seal technology used in Shenzhou decanter centrifuges is ensured by our technological resources for superior performance.

 

Make a difference to your business and the environment:

• High-performance separation, resulting in high-value products and low waste management costs
• Low energy consumption and carbon footprints
• Low maintenance costs thanks to continuous operation, high-grade machine materials, smart design and well-thought preventive services
• Low capital cost/capacity ratio
• Wide-ranging feed variations and controllable performance

• Applications

  

  Food and beverages

    Brewery   Casein, lactose and cheese fine recovery   Coffee and tea   Distilleries   Juices   Plant-based drinks   Plant-based proteins   Starch   Wine

  Life science and biotech

    Fermentation   Biomass separation

  Oils, fats and animal proteins

    Avocado oil   Fish processing   Insects   Olive oil   Palm oil   Rendering   Seed oil   Surimi processing

  Biofuels

    Bioethanol   Biodiesel   Biogas

  
   
  

  Wastewater
  Industrial wastewater treatment   Municipal wastewater treatment   Potable water

  Energy

  Ground engineering   Mineral exploration drilling   Mining and tailings   Pulp & Paper   Zero Liquid Discharge
   

  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

  

  

  

  Decanter Centrifuges for Sludge Thickening and Dewatering

   

  The cost of biosolids storage, transportation, and end-use or disposal can significantly impact the choice of decanter centrifuges to perform thickening or dewatering functions. Generally speaking, sludge thickening before dewatering will reduce the tankage needed for storage by removing water; dewatering works to remove more water producing a drier cake material (source: EPA - Centrifuge Thickening and Dewatering of Biosolids).

  Sludge Thickening

  According to ScienceDirect, Sludge thickening commonly produces sludge solids concentrations in the 3% to 7% range, which results in an 80% volume reduction. Several factors determine whether a sludge thickening system is sufficient in the treatment of biosolids. These include:

   

  Types of Sludge

  • Waste Activated Sludge (WAS) / Secondary Sludge - (0.8-1.3% TS)
    • Has natural separation of free water (floc) and is easily settable
    • Little to no polymer is required. (*)(**)

  * Traditional decanter centrifuges used for sludge thickening can work using little to no polymer but require higher energy consumption or the capacity of the equipment is limited. Other thickening technologies (rotary drum, gravity belt, DAF) need polymer to produce 4-5% solids concentration.

  **The Centrisys THK Sludge Thickener will achieve 4-5% solids concentration using no polymer, with 50% less energy consumption and increased capacity compared to traditional decanter centrifuges.

  • Primary Sludge - (1.5-5% TS)
    • Solids are heavy and settable but laden with colloidal material (hazy)
    • Hard to remove fine particles
    • Polymer is usually required
  • Digested Sludge - (1.5-3% TS)
    • Not easily settable;
    • Polymer is usually required
  • Transportation costs based on tonnages
  • Landfill percent of solids concentration requirements
  • Whether the sludge can be disposed in a sludge lagoon

  Sludge thickening using a decanter centrifuge before a digestion treatment process will reduce the size of the digester, and can be used before sludge storage and liquid land applications. Depending on the utilization of the sludge product (landfilled, land applied or dried) the drier the product the more cost effective it will be for storage, transportation and disposal.

  Sludge Dewatering

  Mechanical dewatering with a decanter centrifuge can result in a 95% reduction in volume and a concentration of between 15% to 35% dry solids, compared with 80% volume reduction and solids concentration of 3% to 7% with a sludge thickening-only operation. By removing more water and thereby producing a drier cake product, dewatering will offer significant savings in treatment, handling, and disposal costs.
   

  Glossary of Terms Used in this Section

  Biosolids	Organic matter recycled from sewage especially for us in agriculture as fertilizer. Treated sewage sludge.
  Cake	The dried substance (sludge solids) from a decanter centrifuge operation.
  Centrate	The liquid discharged from a centrifuge after most of the solids have been removed.
  Centrifugal Force	The force (non-real force) that is needed to make things work as you would think in a reference frame that is accelerating.
  Countercurrent Technology	In countercurrent flow, the two flows move in opposite directions. Under high centrifugal force, the heavier solids migrate radially outwards towards the bowl, displacing the lighter liquid to the pool surface at a smaller radius.
  G-force	An outward force acting on a body rotating about an axis.
  Millon Gallons per Day (MGD)	The measurement of water a facility processes each day.
  Sludge	The semi-solid residual material which is left behind from the treatment of wastewater.
  Slurry	A muddy mixture of a liquid and a solid; a watery mixture of insoluble matter.
  STP	Sewage Treatment Plant
  Total Solids (TS)	The combination of total dissolved solids and total suspended solids in a liquid.
  Total Suspended Solids (TSS)	The portion of fine particles, these do not dissolve, that remains suspended in water.
  Variable Frequency Drive (VFD)	Motor controller that drives an electric motor by varying the frequency and voltage of its power supply. The VFD also has the capacity to control ramp-up and ramp-down of the motor during start or stop.
  Waste Activated Sluge (WAS)	The excess quantity of microorganisms that must be removed from the biological wastewater treatment process to keep the ration of biomass and incoming pollutant load in balance.