thin film evaporation and drying

Thermal Separation Technology VM/MKA / 13.5.20141

OFITechnical / Scientific

Conference

ISTANBUL

Tuesday May 13, 2014


Thin Film Evaporation and DryingThin Film Evaporation and Drying

An advanced technology for treatmentof

edible oils, fats

and related products


Evaporation and Drying Technology

General Definition:

Transition from liquid to vapor phase

Related to our applications:

Separation of volatiles frommixtures or relative thin slurriesby evaporation of this fraction.

The remaining product will bea liquid or a dry product.


Properties of sensitive products:

• Heat sensitivity

• Viscosity

• Foaming

• Fouling

• Solids in product


Requirements for gentle separation process bythermal evaporation:

• Short residence time

• Low temperatures

• High heat flux

• High evaporation rates

• Continuous agitation of the film forcleaning and heat transfer purpose

This leads to Thin Film Evaporation and Drying technology.


SMS thin-film evaporation technologyquickly

separates volatiles from less volatile components

using indirect heat transfer and

mechanical agitation of a flowing product film

within a short treatment time

under controlled conditions.

What is Thin-Film Evaporation ?


Thin Film Evaporator

Feed inlet

Concentrate

Vapour / Distillate


Thin Film Mechanism

• High film turbulence

• Rapid film renewal

• Increased heat & mass transfer

• Controlled residence time

• High squeezing factor

• Viscosity up to 20 kPa*s

Thin Film Evaporator - Principle

heated wall

thin liquid film

rotor blades

bow wave


Solution for temperature sensitive products

Special requirements of the product mixture:

• Very high boiling temperature of volatiles• Temperature sensitive components

Very low vacuum has to be applied:

≥ 0,001 mbar (abs)

This pressure range cannot be handled by

Thin Film Evaporators with external condensers!


Solution: Short-Path Evaporator


Examples of typical applications in theoleo-chemical industry

LecithinDistilled MonoglycerideGlycerine• Methyl Ester• Fatty Acid• Carotene• Vitamin E• Omega 3 Fatty Acids• Biodiesel drying and distillation• Many others


Application 1: Lecithin Drying

SOYBEAN OIL

2- 3 % LECITHIN

DEGUMMING

STAGE1 - 4 % WATER

SEPARATOR

STAGE

Degummed

Soybean Oil

DRYING STAGE

BUSS-SMS

THIN FILM DRYERS

Type KH

WATER

TO STORAGE

WET GUMS

WATER : 40 - 60 %

OIL : 15 - 20 %

LECITHIN : 35 - 40 %

Dryed LECITHIN

WATER : 0,3 - 1 %

OIL : 30 - 35 %

LECITHIN : 65 - 70 %


Lecithin: : Typical Process Flow Diagram

PFAD

Y:\BUECHELH\VERTRIEB\POWER-POINT PRÄSENTATIONEN\PRINCIPAL-LECITHIN-DRYING-PLANT.VSD

Wet

Lecithin

Vacuum

System

MP Steam

Destillate

Dried

Lecithin

Waste

Water

LP Steam

M Lecithin Dryer

LP Cond.

Condenser

Vent

CW Out

CW In

CW In

CW Out

Cooler

H1

H2

H3

P1

P2

P3

V2

V1

VS1

VM-VD/HGB/10-Jul-2006

CW In

CW Out


Application 2: Distilled Monoglyceride

Monoglyceride is the most frequently applied emulsifier in foods,such as

Mono-Glycerides are also used in composing pharmaceuticalproducts and cosmetics plus a variety of technical applications.

• Bakery products • Ice-cream• Cooking ingredient • Chocolate• Sweets • Packing material for food (cheese)

• Chewing Gum • Pasta etc.• Margarine


Process Block Diagram Manufacturing of DMG

Glycerine

Fat

Pre-Heating

MonoglyceridePowderSpray Cooling

DistillationSeparation ofGlycerine and

Catalyst

Inter-Esterification Cooling

FluidMonoglyceride

Catalyst

Glycerine

Glycerine

Di-/Triglyceride

DMG > 95%

DMG < 95%


Distillation Process for DMG

Step 1 Step 3Step 2

Feed Residue

Di- andTriglyceride

Glycerin GlycerinFatty acids

Monoglyceride

Distillate

Pressure 2,5 mbar abs. 0,2 mbar abs. 0,005 mbar abs.

Boiling point ~ 136 °C ~ 130-140 °C ~ 150-160 °C

Heating temperature ~ 180°C ~ 160 °C ~ 185 °C

Solidification point ~ 25-30 °C ~ 68 °C


Application 3: Glycerine Distillation

Purpose:Producing Glycerine of pharmaceutical grade by Thin FilmEvaporation and Distillation.

Process Steps: Elimination of excessive water to < 1 % Distillation of Glycerine in a special developed distillation

column Squeezing of the column bottom by means of our Vertical

Thin Film Evaporator for the highest Glycerine yield Deodorising of Glycerine Bleaching for pharmaceutical grade


Block Diagram Glycerine DistillationG

lyc

eri

ne

Pre

-Co

nc

.

Vent

Thin Film

Evap. Typ

CP-Dryer

Purified

Glycerine

De-

Watering

Deo-

Column

Condes.

M.S. Steam

Jets

Column

Reboiler

Salt, Mong,

Glycerine

Waste

waterGlycerine

Distillation

Column


Pilot test runs

Process design

Basic and detailed engineering

Key equipment manufacture

Quality Control

Assembly supervision -

commissioning

Start-up

After sales services

Buss-SMS-Canzler: Scope of Services


Thank for yourkind attention!

Visit us at booth D 2

thin film evaporation and drying

Documents