Shenzhou Decanter Centrifuge - The Most Versatile Solid Bowl Scroll Centrifuge in Mechanical Separation Technology

• Customization: Available
• After-sales Service: Video Online Support
• Warranty: 1 Year
• Model NO.: LW/LWS series
• Separation Mode: Filter Type
• Operating Type: Continuous Type
• Installation: Horizontal
• Centrifuge Type: Horizontal Spiral Centrifuge
• Pressure: Low Pressure
• Condition: New
• Discharge Type: Self-Cleaning
• Bearing: S-K-F Bearing
• Bowl Material: Stainless Steel 304/316L/Duplex Steel
• Separation: 3phase Separation
• Feature: High Efficiency
• Key Selling Points: Famous Brand PLC
• Transport Package: According to The Model
• Specification: According to the model
• Trademark: Shenzhou
• Origin: China
• Package Size: 210.00cm * 120.00cm * 130.00cm
• Package Gross Weight: 1000.000kg
• Lead Time: 30 days (1 - 1 set) ; To be negotiated ( > 1 set)

Product Description

               Shenzhou decanter centrifuge - the most versatile solid bowl scroll centrifuge in mechanical separation technology

 

When it comes to separating solid/liquid mixes with a high solids content, decanter centrifuges are the way to go. These solid-shell scroll centrifuges or decanters, unlike chamber filter presses, run continuously. The finely distributed solid particles are separated from the suspension by strong centrifugal forces. Decanters are useful in a wide variety of industries throughout the world. The centrifuges are optimally adapted for the specific application. Applications range from sludge dewatering to classification or wet classification to the sorting of solids. To obtain optimum results, solid bowl decanter centrifuges must be custom designed to suit specific separation processes.

Low resource consumption

Separating the vegetable water at an early stage removes a majority of the proteins and prevents slimy accumulations on subsequent process machines. This reduces the required cleaning work and saves enormous quantities of wash water. Using SHENZHOU's energy-optimized separation technology, you can significantly reduce your resource consumption.

Shenzhou decanter centrifuge - the most versatile solid bowl scroll centrifuge in mechanical separation technology
How Do Decanter Centrifuges Actually Work?
A decanter is just a sedimentation tank wrapped around an axis. Solid particles that are heavier than liquid move to the bottom of the sedimentation tank by gravity and form a sediment (solid phase) at the bottom. A wine decanter, for example, can be thought of as a sediment vessel. The solid and liquid phases of a centrifuge are separated by centrifugal acceleration. The solid particles, which have a higher density and are hence heavier than the liquid, migrate outwards in the centrifuge's revolving bowl due to centrifugal force. The sediment forms on the inside of the centrifuge bowl's inner wall. The separation of solid particles from liquid is more faster and more efficient in a centrifuge because centrifugal forces of roughly 3000 g are applied instead of 1 g in a gravitational field.
Specification

Model	Diameter(mm)	Lenght(mm)	Max speed	L/D ratio	G-force	Capacity(m3/h)	Main motor power(Kw)	Weight(kg)	Dimension (mm)
LW250*1000	250	1000	5000	4	2722	0.5-5	7.5	950	2120*1250*680
LW300*900	300	900	4200	3	2964	1-6	11	1160	2150*1300*900
LW300*1200	300	1200	4000	4	2784	2-6	11	1350	2450*1300*900
LW355*1160	355	1160	3600	3.3	2576	2-8	15	1400	2470*1350*830
LW355*1460	355	1460	3600	4	2576	2-10	15	1800	2750*1350*830
LW400*1200	400	1200	3200	3	2294	3-12	18.5	1800	2730*1600*1080
LW400*1600	400	1600	3000	4	2016	3-15	22	2000	3130*1600*1080
LW450*1800	450	1800	2800	4	1976	4-25	37	2500	3320*1700*1130
LW500*2000	500	2000	2800	4	1750	5-35	45	4000	3520*1800*1170
LW530*1855	530	1855	2600	3.5	2006	5-38	55	4680	3885*1350*1600
LW530*2120	530	2120	2400	4	1709	5-40	55	4800	4150*1350*1600
LW550*2000	550	2000	2800	4	2414	6-40	55	5700	4570*1380*1600
LW650*1950	650	1950	2200	3	1761	6-45	75	5000	4840*1510*1720
LW650*2600	650	2600	2000	4	1456	6-65	90	6000	5490*1510*1720
LW720*2160	720	2160	2000	3	1612	7-80	120	6000	5200*1600*1800
LW720*2880	720	2880	2000	4	1306	7-90	120	8000	3100*1600*1800
LW800*2400	800	2400	1800	3	1451	20-100	150	12000	5820*2000*1300
LW800*3200	800	3200	1800	4	1451	20-120	150	1300	7100*2000*1300

Shenzhou decanter centrifuge - the most versatile solid bowl scroll centrifuge in mechanical separation technology
Decanter Feed Pipe Inlet
The product is fed into the decanter scroll's inlet chamber through a centrally located feed pipe. It then travels through the distributor apertures into the decanter bowl after modest pre-acceleration.
Decanter Bowl
The cylindrical/conical decanter bowl rotates at a pre-set speed that is perfectly calibrated for the purpose. The slurry rotates at the working speed within the bowl, forming a cylindrical layer on the bowl wall. Under the influence of centrifugal force, the solids in the product settle on the inner wall of the bowl due to their higher density. The length of the cylindrical bowl section and the cone angle are chosen to fit the application's specific needs.
Decanter Scroll
The separated solids are conveyed toward the conical end of the bowl by the decanter scroll, which rotates at a slightly different speed than the bowl. The solids' residence period in the decanter bowl is determined by this differential speed. Cake dryness is influenced by the amount of time it spends in the oven. It may be modified by adjusting the scroll's differential speed, resulting in appropriate separation. Scrolls are constructed differently depending on the application and activity.
Solids Discharge
Settled solids are ejected into the solids housing through ports at the conical end of the bowl and fall through the discharge chute.
Overflow The cleared liquids (fluid phase) flow to the bowl's cylindrical end and exit through weir plates. The pond depth (liquid layer) in the bowl is regulated by extremely precisely adjustable weir plates (overflow weirs) in these apertures. The liquid is gathered in the drain housing and expelled via gravity.
Impeller
The clarified liquid can alternatively be expelled via an impeller and discharged from the bowl under pressure in a closed system as an alternative to the overflow weir. A separate chamber pump is no longer required. The adjustable impeller, a more advanced type, allows for infinitely changeable pond depth control during the run. This allows for quick and delicate adjustments to changing conditions without shutting down the decanter centrifuge.
Types Of Decanters
There are several types of decanter centrifuges currently utilized in the industry, the most widely recognized are vertical, horizontal and conveyor centrifuges. The principle behind a decanter centrifuge is based on the theory of gravitational separation. For example, if you fill a vessel with a mixture of mud and water, over time the weight of the mud will cause it to settle down at the base of the vessel. With the mud congealed at the bottom, the water will be forced upwards, creating a clear separation between the two.
Decanter Principles
A decanter centrifuge employs the same principles of gravitational force. However, unlike the glass mixture, the process is expedited through the use of continuous rotation. In fact, rotation provides anywhere from 1000 to 4000 times the normal gravitational force, reducing the time required for separation from hours to seconds.
Rotational Separation
The concept of rotational separation is similar to rides found at amusement parks and county fairgrounds. In these rides, placing yourself at an angle allows you to overcome the gravitational forces induced by rotation. Similarly, a decanter centrifuge is essentially a bowl tube that rotates at an extremely high speed. The bowl tube is equipped with an internal conveyor which moves in the same direction but at a different velocity.

Decanter centrifuge details

Decanter centrifuges process characteristics
The separation process in a decanter centrifuge relies on a few process characteristics such as centrifugal force or G-force,sedimentation rate and separating factor, differential speed between the conveyor and bowl, and clarity of the liquid
discharge.Decanter centrifuges require a centrifugal force for the separation of the solids from the liquid. This characteristic is dependent on the radius of the centrifuge and its angular rotational speed. A decanter centrifuge applies a force equivalent to several thousand G's, which reduces the settling time of the particles. It is also favored to maintain a large G-force, which wil result in an improved separation.The rate at which sedimentation occurs is an important characteristic of the decanter centrifuge separation process. The sedimentation rate is influenced by the particle size, the shapes of the particles, their differential densities and the viscosity between the particles and the liquid. This process characteristic can be improved by utilizing flocculating agents. The sedimentation rate is also dependent on the separating factor of the decanter centrifuge, which is related to the centrifugal force.The exterior bowl and the scroll conveyor rotate at different high speeds. This differential speed between the two is accountable for the sedimentation throughout the decanter centrifuge cylinder. A high differential speed results in a smaller residence time of the cake settlement, so it is necessary to keep the cake thickness to a minimum to avoid impairing the discharge quality.

Keeping the cake thickness to a minimum also aids in the improvement of the cake dewatering process. For this reason, it is necessary to obtain an optimal differential speed to balance the cake thickness and quality.The characteristic above all affects the clarity of the liquid output which is dependent on the volumetric throughout rate, where a higher flow rate will result in a poor liquid clarity. Another characteristic that influences the clarity of the liquid output is the differential speed. A low differential speed results in a better clarity, therefore, aiding in the separation process. The G-Force also plays a role in the clarity of the liquid discharge. Higher G-force results in an increase in the separation of the solid particles from the liquid and yields a better clarity.
 

How it works

How does it work
The feed product is pumped into the decanter centrifuges through the inlet. Feed goes into a horizontal bowl, which rotates. The bowl has is composed of a cylindrical part and a conical part. The separation takes place in the cylindrical part of the bowl. The fast rotation generates centrifugal forces up to 4000 x g. Under these forces, the solid particles with higher density are collected and compacted on the wall of the bowl. A scroll (also screw or screw conveyor) rotates inside the bowl at a slightly different speed. This speed difference is called the differential speed. This way the scroll is transporting the settled particles along the cylindrical part of the bowl and up to the end conical part of the bowl. At the smallest end of the conical part of the bowl, the dewatered solids leave the bowl via discharge opening. The clarified liquid leaves through a paring disc (internal centripetal pump).
3-phase separation with a decanter

With a 3 phase decanter centrifuge, it is possible to separate 3 phases from each other in one process step only. For example, two liquids which cannot be mixed because of different densities (e.g. oil and water) are separated from a solids phase. The heavy liquid (water) collects in the middle between the oil and the solids layer. Thus the two liquids separated from each other can be drawn off from the decanter. The solids are transported via the scroll to the discharge
openings as it happens also in 2-phase separation.Typical applications of 3-phase separation are the production of edible oils such as olive oil, oil sludge processing, the production of biodiesel etc.
Parameters and influencing factors of the separation
Feed, throughput and residence time
Through the feed, the separation medium to be processed can be input into the center of the infeed chamber of the scroll, where it is accelerated. The throughput will have an influence on the residence time.
Decanter Centrifuges Acceleration
The separation medium reaches its maximum speed in the decanter bowl, causing the solids to settle on the bowl inner diameter. A characteristic feature of the bowl is its cylindrical/conical shape.
Differential speed

There is a differential speed between the decanter bowl and the scroll, which is created by a gear unit on the
industrial decanter centrifuges. The differential speed determines the solid content in the outfeed.
Filling volume / Weir discs or overflow weir The clarified liquid flows to the cylindrical end of the bowl in the decanter centrifuge, from where it runs out through openings in the bowl cover. These openings contain precisely adjustable weir discs/weir plates by means of which the pond depth in the bowl can be set. The weir discs determine the filling volume of the bowl.

Advantages and limitations over competitive processes
Generally the decanter centrifuge has more advantages than disadvantages; however, there are some limitations when compared to other processes.
Decanter Centrifuges Advantages:
* Decanter centrifuges have a clean appearance and have little to no odor problems.
* Not only is the device easy to install and fast at starting up and shutting down but also only requires a small area for
operation compared to other competitive processes.
* The decanter centrifuge is versatile as different lengths of the cylindrical bowl section and the cone angle can be selected for different applications. Also, the system can be pre-programmed with various design curves to predict the sludge type, while some competitive processes, such as a belt filter press, cannot change the belt type to operate for different sludge types. Its versatility allows the machine to have various functions such as operating for thickening or dewatering.
* The machine can operate with a higher throughput capacity than smaller machines. This also reduces the number of units required.
* The device is simple to optimize and operate as it has few major variables and reliable feedback information.
* The decanter centrifuge has reduced labor costs compared to other processes, as it requires low continuous maintenance and operator attention.
* Compared to some competitive process such as the belt filter process, the decanter centrifuge has more process flexibility and higher levels of performance.
Decanter Centrifuge Application fields
1. Food
A Flesh processing,aquatic products processing and edibleprotein recovery;
B Extract plant protein from soybean,oily seeds andleguminous plants;
C Recovery of brewing leach liquor,malt and yeast;
D Treatment and recovery of wine lees liquid;
E Extract of instant coffee and tea;
F Clarification of palm oil,olive oil and seed oil;
G Extract juice from fruits ,berries and vegetables;
H Recovery of refined pectin; Clarification of grape juice and grape wine.
2. Environmental protection
Drilling mud,industrial efluentwaste water of municipal works, fertilizer,organic waste water,paint sludge ,plastic particles,gravel washing water,waste water in steel-making,fluegas desulfurization,sewage sludge treatment of waterworks.
3. Petroleum and chemical industry
A Processing of kaolin and calcium carbonate,production ofbentonite and titanium dioxide;
B Exploration of petroleum oil,natural gas,crude oil refiningand related industries,additive of lube oil and waste oil recovery;
C Intermediate products and final products of organic chemistry industry;
D Thermoplastic materials,includes PVC,polypropylene,polystyrene, synthetic rubber and fiber;
E Inorganic chemical industry,includes bleach,acid ,ilicaproducts and fertilizers;
F Treatment of spent wash and molasses fermentationresidues;
G Extraction of starch from wheat,corn,cassava and potato;
H Waste liquid recovery and recycling from above industries.

Company Profile

Liaoyang Shenzhou Machinery Equipment Co., Ltd.belongs to SHENZHOU Group. We are the professional manufacturer of Centrifuge & Separator, Liquid Filling Machine and packing machine. With many years producing experience, our factory have become leading manufacturer with professional technical team and Independent after-sale department.

Our international trade department can supply the whole project service. With many years development, we have known which factories have strong product with competitive price and we have built long-term and stable cooperation relationship with them. Our main area are the food and pharmacy project. Our successful project are coconut oil production line, liquid filling production line, packing production line and the tablet press production line, soft gelatin production line and so on. Our aim is providing you efficiently solution and superior after-service. We sincerely hope YOU are our next customers! Exported country: At present, our products have been exported to South Korea, India, Denmark, Russia, Georgia, Jordan, Bangladeshi, Tailand, Ethiopia, Finland, the United States, Canada, Australia, Spain, Japan, Colombia, Romania and so on more than 30 countries

Packing & Delivery

1.Parking:standard wooden box
2.Spare parts :we supply some parts and accessories for free.
3.Electronic module:it is made up of electronic control cabinet.
4.Special tools:we supply a set special tools for free.
FAQ
1. 12 months guarantee period from machine arriving date.
2. Abundant spare parts in stock are available to provide.
3. Our technicians could be dispatched for overseas service.
4. 7*24 hours technical consultation.
5. Your workers could get trained both in our factory and yours.
6. Routine tracing till the machine work properly will be done timely.
7. We will remind you to do the normal maintenance.
8. Your suggestions or any comments & reflection would be treated in priority.
9. Marketing team will visit you during our visit in your country if you require.