Lws Three-Phase High Torque Oil Sludge Horizontal Screw Centrifuge

• Customization: Available
• After-sales Service: 24 Hours on Line
• Warranty: 12monthes
• Model NO.: LW
• Type: Centrifuge
• Separation Mode: Sedimentation Type
• 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

SHENZHOU-EV(Environmental Decanter) Series decanter centrifuges can be used on scrape or flush dairy and cattle feed lots, swine, poultry or other animal manure waste, lagoon sludge, or to dewater aerobic or anaerobic digester sludge. The decanter centrifuges can also be used on fish waste, algae, and other wetland applications. SENZ-EV decanter centrifuge can be used for manure separation and /or thickening prior to anaerobic digestion as well as for dewatering after anaerobic digestion. A wide range of manure slurry feed rates, feed solids concentrations and feed materials can be centrifuged. Minor coarse prescr eening or maceration is recommended for large and miscellaneous debris. No polymers or other additives required. Polymers can be used if solids removal levels in the high nineties are required.

SEN Decanter Centrifuge for Animal waste treatment:

• SZ-EV decanter centrifuge is widely used for dewatering of scraped and / or flushed dairy, cattle, swine, poultry and other animal manure wastes, older lagoons sludges, plus dewatering digester sludges both aerobic and anaerobic
• SZ-EV decanter centrifuge commonly separates 70 to 85% of suspended solids in fresh flushed dairy or swine manure waste without direct addition of chemical treatments although higher removal rates are possible with addition of polymers or flocculants
• SZ-EV decanter centrifuge dewatering eliminates thousands of gallons of water from being applied to the fields which allows separated manure solids discharged from the centrifuge at up to 36% dry weight solids to be applied to the fields without overloading fields with nutrient loaded water and run-off
• SZ-EV decanter centrifuge offers maximum flexibility and adjustability to meet process requirements for solids discharge dewatering fresh flushed swine manure solids to approximately 30% dry solids or thickening within the 5% - 10% dws range with simple adjustments
• SZ-EV decanter centrifuge is available for a wide range of manure slurry feed rates, feed solids concentrations and feed materials can be processed with coarse prescreening recommended to remove large debris including rocks, excess sand and other miscellaneous debris
• No filter media to blind-off, All stainless steel product contact surfaces make the machines resistant to corrosion, No screens or filter cloths to replace

 

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 is mainly designed for separating solids from liquid phase. Including dewatering process for maximum concentration of solids, or concentrating solids phase. 

 

Solids-liquid Separation takes place in a horizontal cylindrical bowl equipped with a screw conveyor. The raw material is fed into the decanter centrifuge bowl through a inlet tube and is then smoothly accelerated by an inlet rotor. Centrifugal force immediately makes the solids build up on the wall of the bowl. The scroll conveyor rotates in the same direction as the bowl, but at a different speed, thus moving the solids towards the conical end of the bowl. The solids leave the bowl through the solids discharge openings into the casing. Centrifugal separation takes place throughout the entire length of the cylindrical part of the bowl, and the clarified liquid leaves the bowl by flowing over adjustable plate dams into the casing. In some cases, cleaned liquid phase is discharged out under pressure through built-in impeller.

The construction of a basic centrifuge with all its main components is shown in the above figure. The heart of the decanter is the rotating assembly, which comprises a mainly cylindrical bowl housing an Archimedian screw conveyor, with a small clearance between it and the bowl. One end of the bowl is conical in shape, providing the means whereby solids can be removed from it. Affixed to one end of the bowl is usually a gearbox to effect a small differential speed between the conveyor and bowl.

The rotating assembly, usually horizontal, is supported by a bearing in a pillow block at either end of the assembly. Surrounding the bowl is a casing to collect at one end the clarified liquor and dewatered cake at the other. The bearing pillow blocks are mounted accurately on a rigid frame together with the casing.

Sometimes the frame is mounted on a sub-frame together with the drive motor, and where necessary a back-drive system, to control the gearbox pinion shaft. which will in turn control the conveyor-to-bowl differential speed. The back-drive system will be described further, but for the present it suffices to say that it is essentially a braking motor or similar device coupled to the gearbox pinion shaft. The main motor is offset from the bowl and drives the bowl by means of a set of V-belts. The back-drive can also be offset. In which case it would be connected with a timing belt. The timing belt is to facilitate more accurate speed control. However, the back-drive system can also be mounted direct in line with the pinion of the gearbox.

The sub-frame assembly, or the main frame if there is not a sub-frame, usually is supported by vibration isolators.

The feed enters the bowl through ports in the conveyor, having entered the conveyor hub through a stationary coaxial feed tube projecting into the conveyor from a support, mounted on the main frame.

Feed slurry is metered through the feed tube into the rotating bowl. Suspended solids sediment to the bowl wall, where they are picked up by the conveyor and scrolled as a saturated cake to the conical end of the bowl, over the heel of cake which builds up in the small clearance between the bowl and conveyor. The resulting clarified liquor flows to the opposite end of the bowl and decants over weirs into the casing for discharge. The cake scrolls up the conical section of the bowl, the beach, before it falls into the casing for discharge.

The heel, the thin layer of process solids which builds up between bowl and conveyor, can progressively consolidate with coarser particles bedding themselves into it. This, while providing an aid to scrolling efficiency, can be an unwanted source of abrasion for the conveyor. However, generally, there is a tendency for the heel to move, albeit at a much lower rate than the cake itself. Thus there is a tendency for the heel slowly, but continuously, to regenerate itself.

Materials of construction are important considerations in the basic design. Most decanters are constructed with the parts in contact with the process in some form of stainless steel.

Separating decanter centrifuge, 3-phase decanter centrifuge, is mainly used for separating two immiscible liquids of different densities from each other, simultaneous removing solids.

 

The light liquid phase is discharged into the casing through radial holes in the large end hub. The heavy liquid phase is discharged through axial holes in the large end hub. The liquid radius for the light liquid phase is smaller than the radius for the heavy liquid phase. The liquid level is controlled by plate dams. In order to prevent the light liquid phase from leaving the bowl through the heavy liquid phase outlet, a separating plate is placed on the inside of the large end hub. The heavy liquid phase has to pass under the separating plate before being discharged into the casing. The liquid radius for the heavy liquid phase is controlled by plate dams. The solids are discharged under gravity.

The solid-wall bowl of separating decanter centrifuge has a cylindrical section for efficient separation and clarification of the liquids and a conical section for drying the solids.

The product enters the separating decanter centrifuge through the feeding pipe and passes through the distributor into the separation chamber. The liquid level in the bowl is adjustable via regulating tubes or overflow dam. Due to the centrifugal forces, the solid particles are flung onto the bowl wall. The hardfaced scroll conveys them to the solids discharge which is equipped with hard metal bushes. The solids are discharged under gravity.

The liquid phases are separated in the separation zone. The liquid radius for the light liquid phase is smaller than the radius for the heavy liquid phase. The layer thickness of the heavy phase is externally adjustable via regulating tubes or overflow dam. this changes the liquid level in the bowl. The light liquid phase moves in the direction of the bowl axis and is discharged under pressure via centripetal pump or under gravity. The heavy liquid phase moves in the direction of the bowl shell and is gravity discharged through regulating tubes or built-in impeller. In conventional design of separating decanter centrifuge, in order to prevent the light liquid phase from leaving the bowl through the heavy liquid phase outlet, a separating plate is placed on the inside of the large end hub.

Simultaneously separating liquid-liquid-solid mixture, which greatly saves energy consumption.
- Separating decanter centrifuge can handle a wide range of solids concentrations in feeding.
- Separating decanter centrifuge can flexibly respond to changes in the concentration of light-heavy liquid phases in raw materials
- When the liquid phase is discharged under pressure by the built-in centripetal pump, the downstream transfer pump is omitted.

- Separation of oil sludge containing oil from refineries, oil ponds, etc.
- Extraction of animal/vegetable fats and oils
- Starch manufacture for separating wheat starch and gluten
- Oil water and solids separation
- Coal tar treatment
- Biofuel production
- Lubricating oil additives
- Meat/poultry/fish processing

Classifying Decanter Centrifuge is mainly used for classifying of solids. Continuous separation of solids from suspensions with very high solids content of up to 60%, clarification of liquids, concentration of solids, classification of solids according to particle size.

 

Classification, the fractionation or separation of particles by size,could be considered as merely inefficient clarification. The cut, or desired classification, is adjusted by altering the classifying decanter centrifuge's efficiency. This is most easily done by altering the feed rate or bowl speed of classifying decanter centrifuge. However, adjustment of pond depth or differential may. in certain circumstances, be used.

In some classification applications. the required cut point is very sharp and the rheology of both separated phases is such that they remain quite fluid. In this type of application, the classifying decanter centrifuge's pond used would be relatively deep, and separation would be akin to a liquid-liquid separation, using a hydraulic balance under some form of baffle.

Very occasionally there will be found a classification application where it is required to separate two distinctly different particles. such as in the refining of minerals. In these cases, the two different substances to be separated may have markedly different densities. For classifying decanter centrifuge, it is particularly acceptable and quite advantageous when the denser material comprises the larger-sized particles. However, if this is not so. one must consider a combination of density and particle size for the cut point of each of the two substances, in relation to Stokes' law. One could visualize the situation of a large, low-density particle settling faster than a high-density, small particle. Thus for such a process to be feasible.

Each of the two solid constituents will have their own size distribution from which a cut point size can be chosen to give the desired purity of product and yield by classifying decanter centrifuge.

The solid-wall bowl has a cylindrical section for good separation and clarification of the liquid or classification of the solids and a conical section for dewatering the solids or concentration of the precipitated coarse particles.
The product is fed info the decanter through the feed and is conveyed to the separating or classifying chamber through the distributor. The liquid level of classifying decanter centrifuge can be adjusted by regulating plates. The coarse solid particles are forced to the wall of the bowl by the centrifugal force. The scroll conveys the precipitated solids particles to the solids discharge. The clarified liquid or the classified fine particles are discharged from the separating chamber via replaceable regulating plate.

- High product yield of the processed raw materials or preliminary products
- Optimized bowl design for large clarification area and therefore highest performance
- Dynamic stability of the frame design for a long service life and high safety
- Intelligent drive systems for simple differential speed adjustment available achieving optimum dry-substance values
- Overload protection and protected bearings ensure permanent and reliable operation
- Depending on the area of application, the scroll is faced with hard-metal for wear protection
- Corrosion protection for all components which come into contact with product by the use of stainless-steel materials
- Rotational hard-metal wear bushes in the area of the solids discharge double the service life of the bushes
- Ease of access to all relevant components reduces maintenance time
- Available with gravity or pressure discharge of the clarified liquid phase

- Chemical industry
- Mineral processing
- Starch technology

 

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.

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.

 

 

Animal protein Fish and meat by-product processing Surimi processing Edible protein recovery Brewery Recovery of extract, wort and yeast Chinese medicinal materials, coffee and tea Extraction of valuable components from Chinese medicinal materials, coffee and tea Dairy Recovery of casein, lactose, whey fines and cheese fines Edible oil Clarification of palm oil, olive oil and pressed seed oil Juice Extraction from fruit, berries and vegetables Pectin Recovery of extracted pectin Vegetable protein Extraction from soybeans, oil seeds and leguminous crops Wine Must and wine clarification

Mineral industry Kaolin clay and calcium carbonate processing, bentonite and titanium dioxide manufacturers Oil exploration and petrochemical industry Oil exploration, oil refineries and related industries, lubricating oil additives and waste oil stream recycling Organic chemical industry Organic intermediate and end products Polymer industry Thermoplastics including PVC, polypropylene, polystyrene, synthetic rubber and fibres Inorganic chemical industry Bleaching agents, acids, silica products and fertilizers Ethanol production Processing of grain alcohol spent wash and molasses fermenter residues Starch processing Based on wheat, maize, tapioca, cassava and potatoes Waste recycling Recovery and recycling of waste streams from the sectors listed above

 

 

 

 

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