2 Phase Decanter Centrifuge for Cleaning of Sunflower Oil

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Product Overview

Description


 

Product Description

 

Decanters with slow rotation speeds are normally based on horizontal separation technology. Decanters ensure optimum separation efficiency in the case of suspensions with a very high proportion of solids. They are also used for the extraction of constituents from liquids and for concentrating, dewatering and classifying solids.

 

Decanters designs:
Type: 2-phase separation, 3-phase separation
Materials: use high-quality stainless steel for all product wetted areas.
Bearings:  SKF brand. A special selection and arrangement of bearings provides for long life and exceptional reliability. 
Wear protection:  welded hard facing or spray coating,ceramic technology.

There are basically two application types in the wastewater treatment industry for the decanter centrifuge:

  • The first is to take liquid slurry (around 1-3% ds.) as feed to the decanter and thicken it to around 8% ds, often prior to going to a biological digester.

  • The second is to feed the decanter with similar slurry and dewater the solids to a dry looking solids mass prior to disposal. In the second case the solids can come from the primary clarifier or the secondary clarifier after biological treatment.

Thickening of Activated Sludge

Many effluent treatment plants use a biological treatment step to reduce the COD and BOD of a wastewater before discharging into the environment via rivers and streams. During the operation, the colonies of bacteria develop and the growing biological body produces a solid waste as it feeds on the chemicals and nutrients.

It is necessary to continuously purge the growing biological mass to control its activity and efficiency. The purge stream is usually in the form of dilute slurry, 0.5% to 3% ds, which is easier to handle if it is first thickened. Some of the thickened slurry can be returned to the biomass to maintain an optimum concentration of bacteria. The remaining waste activated sludge is for disposal.

The Reyes Centrifuge Systems range of decanter centrifuges is well designed for these duties. Controlling the decanter operating parameters can optimize the consistency of the discharged sludge.

Sludge consistency can be chosen to match the needs for disposal. Slurry for land application should be thickened to reduce the volume of water but still needs to be thin enough to be spread evenly on the land. Slurry for feed to a digester can be thicker but often still needs to be pumped. When the disposed slurry is for landfill, dewatering the feed to a stackable consistency will reduce weight, volume and disposal costs.

A simple decanter installation provides the flexibility to ‘dial in’ operating parameters to produce a choice of thickened sludge concentrations. The installation allows for the use of a polymer to help the separation but a polymer is not an essential.

The decanter will thicken an activated sludge without polymer producing solids at 6%-ds ideal for land spraying. However, the liquid centrate remains cloudy, 0.2%-ds, and can still pose a disposal problem. Many companies use a low concentration of polymer to clear up the centrate to only 200-ppm ds.

By increasing the polymer concentration and adjusting the bowl speed and conveyor speed of the decanter, the system will provide clear centrate and solids discharged at 8%-ds. Once the system is set up, the hydraulic conveyor drive automatically adjusts its speed to control the consistency of the discharged solids. These are the parameters most used to produce solids as feed to a digester.

Increasing the concentration of polymer further and again adjusting the decanter operating parameters will thicken the feed and produce stackable solids at 12%-ds. As before, once the conditions are selected, the decanter will control the solids discharge by an automatic adjustment of conveyor speed. You can clearly see the difference in the consistency of the solids in the photograph below.

Models 

Basket diameter

(mm)

Length of the drum

(mm)

Rotation Speed of the drum

(r/min)

Relative centrifugal force

Motor power

(kw)

Productively

M3/h 

Weight

(kg)

Dimension (L*W*H)mm

PC250x900

250

900

5400

4000

11

1-5

1050

1800*1200*600

PC360x1200

360

1200

4200

4200

15

3-12

2100

2600*1580*1040

PC360x1500

360

1500

4200

3550

22

5-10

2600

2900*1600*1040

PC420x1750

420

1750

4000

3750

37/45

6-30

3500

3120*1580*1070

PC420x2100

420

2100

4000

3750

45

6-35

4100

3450*1580*1070

PC500x2000

500

2000

3800

4000

45/55

10-40

6500

3600*2300*1400

PC500x2500

500

2500

3800

4000

55/75

12-45

7200

4100*2300*1400

PC550x1900

550

1900

3200

3154

45/55

13-50

4600

3400*1810*1110

PC550x2400

550

2400

3200

3154

55/75

13-55

5600

3900*1810*1110

PC650x2000

650

2000

2650

2500

55/75

15-65

7100

4000*2300*1400

 

 

Models 

Basket diameter

(mm)

Length of the drum

(mm)

Rotation speed of the drum

(r/min)

Relative centrifugal force

Motor power(kw)

Main/auxiliary motor

Productively

M3/h 

Weight

(kg)

Dimension (L*W*H)mm

PC450X1800

450

1800

4000

4028

45/18.5

10-35

4200

4400*1350*1460

PC450X2100

450

2100

4000

4000

45/18.5

10-40

4600

4700*1350*1460

PC500X2200

500

2200

3800

4000

55/22

15-45

5000

4400*1400*1480

PC500X2550

500

2550

3800

4000

75/22

15-45

5500

4700*1400*1480

PC550X2200

550

2200

3200

3151

55/22

18-55

5300

4500*1500*1500

PC550X2600

550

2600

3200

3151

75/22

18-60

7500

5000*1500*1500

PC650X2200

650

2200

2650

2553

75/22

20-65

7600

4700*1650*1650

PC650X2600

650

2600

2650

2553

90/37

20-70

9100

5100*1650*1650

PC720X2000

720

2000

2540

2600

90/37

25-75

11000

4700*1730*1750

PC720X2500

720

2500

2540

2600

132/37

25-80

12800

5200*1730*1750

PC800X2000

800

2000

2000

1790

132/45

35-100

14000

4750*1800*1830

PC1000X2000

1000

2000

1800

1780

250/45

40-120

17800

4800*2000*2000

 

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Our Services

 

The technical and after-sale services are listed as follows:

1. Provide free technical training, guidance and information of accessories.

2. Our technical staff could instruct our customers on the installation of connector and accessories on site, and deal with technical and quality issues.

3. We guarantee more than 10 years’ service life of our products with 2 years’ warranty and life maintenance.

4. 24-hour hot line: 86-13674188053. Once receive the customer complaints, we will response within 24 hours.

5. Free maintenance and replacement will be provided if defects result from quality failure of our product.

6. Our company will provide technical services by phone, fax, e-mail, etc., please refer to the contact details.

7. Our company will implement the contract strictly; deliver the products to location specified by our customers for free in accordance with the mode of transportation.

8. Our company will provide perfect after-sale services and technical support. Hot line: 86-13674188053

Contact person: Grace Liu

 

Once receive the calling of complaints, we will respond to it within 12 hours at working time and provide solution within 48 hours. If necessary, our company will send technical staff there and provide on-site solution.

 


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