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Vacuum Dehydration systems

Oil vacuum dehydration systems have several filtration steps for removing particulate and vacuum distillation unit for dehydration.

FV (Vacuum Dehydration) Compared to Other Technologies

Centrifuge units removes free water only; has difficulty breaking stable emulsions; larger envelope dimensions but lower flows; higher initial and operating costs.

Desiccant units have limited water removal capability due to absorbing material; only removes air ingressed particles; expensive compared to the volume of water removed. Does not work well in viscous fluids (>100 cSt.)

Coalescer units removes free water only; has difficulty breaking stable emulsions; does not work well in viscous fluids (>32 cSt.)

Water Removal Techniques

Water Type Removed

Separator Type

Dissolved

Emulsified

Free

No

Some

Yes

Gravity

No

Some

Yes

Centrifuge

No

Some

Yes

Coalescing

Some

Yes

Yes

Desiccant Filtration

Yes

Yes

Yes

Vacuum Distillation

 

Factors that affect water extraction Rate

Properties­

Water Extraction Rate

Oil Temperature

Strongly Increased

Operation Vacuum (Negative Pressure in Vacuum Tower)

Increased

Initial Content of Water

Increased

Flow Rate of FV System

Increased

Oil Properties

Viscosity

Reduced

Surface Tension, Detergent Additive

Reduced

Air Humidity

Reduced

  

 

 

FV Series