DiFlow Semi-Continuous Deodorizing System

DiFlow Semi-Continuous Deodorizing System

Measuring
VesselTo Vacuum

ScrubberHeat recovery anddeaerating tray
Pre-stripping andheating tray

DiFlow stripping anddeodorizing trays
Feed
Filters

Distillate
to storage
Distillate
ReceiverDeodorizing andpre-cooling tray

Distillate
CoolerAntiOxidant

Cooling tray

Collection tray
SteamDeodorizer

Feed
HeaterProductCooler

PolishFilters

Deodorized oil
to storage

BleachedOil

PROCESS BASICS
Designed for minimum product co-mingling.
Highest deodorizing efficiency with shallowlayer stripping in DiFlow cascading film tray.
Optional double thermo siphon loops for optimum heat recovery.
Optional hot water heat recovery system.
Zero air leaks with steam sealed man-ways.
Easy access for service and maintenance.

Batches of pre-heated oil are charged to the Measuring Vessel where
the oil is partially deaerated and dried. The batch is dropped into theDeodorizer at 15-20 minute intervals. There the oil is progressivelydeaerated, stripped, deodorized, heat bleached and cooled.
The oil is pre-heated in the heat recovery tray with steam generated by
hot deodorized oil in the pre-cooling tray. The coils of the trays areconnected in a closed system partially filled with water. This creates athermo-siphon effect that naturally circulates the fluid in the coils as it
alternates between the liquid and vapor phases.
The DiFlow stripping and deodorizing tray has three steam agitatedsub-compartments. Steam is also injected in multiple lift tubes risingfrom the bottom compartment to the middle and top compartments.
The oil collecting in the bottom is thereby rapidly recycled to the overlying compartments from where it cascades back to the bottom. This
produces a falling curtain of oil between the compartments which,combined with the shallow layers, substantially increases the surface
area of oil exposed to full vacuum and thereby improves the efficiency.
Fatty acids and other materials, evaporated from the oil, are condensed
by contact with recycled and cooled distillate in the Scrubber.

Crown Iron Works

The heating steam for the heating tray is supplied by a self-contained
high pressure steam generating system.

P.O. Box 1364, Minneapolis, MN 55440 USA
Tel: +1-651-639-8900 Fax: +1-651-639-8051
sales@crowniron.com www.crowniron.com

The entire system operates under deep vacuum (1-3 mbar) generated
by either a traditional vacuum system or an ice condensation system.

DiFlow Semi-Continuous Deodorizing System
FEATURES AND ADVANTAGES••••Minimum product co-mingling with trays, internal structures andexternal equipment designed for maximum drainage.
Minimum steam requirements due to shallow layer stripping in
DiFlow cascading film trays.
Highest heat recovery with double thermo siphon (TS) loops.

Optional thermo-siphon heatingtray

Up to 200,000 kJ per metric ton of additional heat recovery possible by using spent cooling water to heat boiler feed water etc.

•Seamless and X-rayed coils for high durability.

•Coil bundles removable through man-ways.

•Thermo siphon pre-heating anddeaerating tray

Final heating and pre-stripping
tray
Internal reflux collector

Zero air leakage into the deodorizer ensured by steam sealed manways and sight glasses.

•Easy access for service through strategically placed man-ways.

•Plant sizes from 50 to 650 TPD (metric tons per 24 hours).
DiFlow stripping, deodorizing
and heat-bleaching trays (1 - 3)
UTILITY CONSUMPTION
Typical figures per metric ton of oil entering at 60 oC:
Electric Power:

1,5 - 2,5 kWh depending on plant size
Add about 4,2 kWh for ice condensation

Steam (10 barg):

120 kg (with surface condensers)
25 kg with ice condensation

Heating Energy:

317,000 kJ + 3,500 kJ/% FFA (single TS)
223,000 kJ + 3,500 kJ/% FFA (double

Lift tubes for recycling oil frombottom of tray to upper levels

Optional thermo siphon coolingtrayTS)
Cooling Water (30 oC): 15 m3 at UT 6 oC
4 m3 at UT 6 oC with ice condensation

Thermo siphon cooling tray

Citric Acid:

Anti-oxidantNote:0,05 kg(optional as anti-oxidant)

Cooling water is amount circulated per metric ton of oil.

Cooling tray

EQUIPMENT SPACE REQUIREMENTS
50 - 300 TPD:
300 - 650 TPD:

Four levels, each 55 m2 with 6 m elevation
Four levels, each 70 m2 with 6 m elevation

Collection tray

The deodorizer will require a total elevation of 24 - 34 m.
Note: Control room, MCC, HP steam generator and refrigeration
system (for ice condensation) are not included.

Crown Iron WorksEuropa Crown Ltd.

a CPM Company
P.O. Box 1364
Minneapolis, MN 55440 USA
Tel: +1-651-639-8900 Fax: +1-651-639-8051
sales@crowniron.com www.crowniron.com

a CPM Company
Waterside Park. Livingstone Road
Hessle, East Yorkshire, HU13 0EG England
Tel: +44-1482-640099 Fax: +44-1482-649194
sales@europacrown.com www.europacrown.com

OFFICES: ARGENTINA, BRAZIL, CHINA, HONDURAS, INDIA, MALAYSIA, MEXICO, RUSSIA, UKRAINE

10/09