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Auf dem Steine 4 · D-98693 Ilmenau · www.normag-glas.de Tel.: +49 (0) 3677-2079-0 · Fax: +49 (0) 3677-2079-20 · [email protected]
NORMAG Falling Film Evaporator FFE
The NORMAG-Falling film evaporator is due to istwide operation range from 0,01 up to 1 bara andthe robust and corrosion resistant design ideal forthe flexible requirements in laboratories andexperimental halls. Due to its modular design theevaporator can be combined e.g. with acondenser or a distillation column. Especially thisflexibilty, the product sensitive operation and thevery good reproducibility of results makes thedifference to other evaporators such as electricalheaters. The evaporator itself is – as illustrated – a verticalevaporator tube, heated by oil or steam. At theinner tube of the evaporator rinses – illustratedlight brown – a thin and equally distributed liquidfilm downwards and is partially evaporated. Thevapor and remaining liquid flow cocurrent into thesump and will be separated in the vaporous sidestream and the – dark brown illustrated – liquidhold-up. The liquid overflow is level controlled. Amajor part of the hold-up will be redistributed ontop of the evaporator by the NORMAG magneticpump and the - dark brown illustrated - innerpump tube for pre-heating of the liquid ontoevaporation temperature.
Evaporator Tube in stainless steel or borosilicate glass 3.3
Equal liquid film thickness and distribu-tion by spezial structure or roughening of the evaporator tube surface
Wide operation range due to NORMAG-Pump- and apparatus design
Product sensitive evaporation by opti-mised residence time and heat stress
High evaporation rates possible
Minimised Hold-Up
Design for high reproducibility as the ba-sis for feasibility studies and scale-up
Single apparatus or complete systems
Modular Design
Options
- Complete corrosion resistant design - Batch or continous operation - Operation with solid content - Fractionation of distillate
Falling Film Evaporator with modular flange for a
condenser or distillation column
1 Umbrella distributor andspezial NORMAG-overflow-weir for a highlyefficient liquid distributiononto the evaporator tube
2 Evaporator tube
- Boro 3.3, roughened, or - stainless steel for high efficient heat transfer- struktured stainless steel evaporator tubes for very high k-values respec- tively very small tem- perature differences for sensitive evaporation
3 Heating jacket options
- themofluid heating with spezial distribution - steam heating
4 Bottom vessel
- minimised hold-up - optional complete heat-
ing of the jacket for highoperation temperatures
5 NORMAG-sump-pump
Special magnetic pump,completely corrosion resis-tant, robust, with extremelylow NPSH even for boilingliquids
6 Flange zone Optimised heating even ofthe flange zones by use ofNORMAG-turn backs asan option
Auf dem Steine 4 · D-98693 Ilmenau · www.normag-glas.de Tel.: +49 (0) 3677-2079-0 · Fax: +49 (0) 3677-2079-20 · [email protected]
Characteristics of NORMAG-Falling Film Evaporator
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Feed-Degasser: In the feed to the evaporatorincludes are inert gases or airsoluted. The content can bedetermined most times by thepressure and temperaturewhile the feed is in contact withthe gas. For Evaporation processeswith a relatively high solutedgas content of the feed andextremely low pressures atmoderate pressures is pro-posed, since this will reducethe rising volume flow of non-condensable gases from theevaporator to the vacuumpump system. Modularity: The evaporator can easilymodular adapted with variousother modules, in most caseswith - a descending condenser - a distillation unit as illus-
trated NORMAG-quality: The NORMAG sign on eachglass component ensures reli-able components in highestquality due to customer re-quirements. Specific dimen-sional & tolerance validationand for complete units func-tional tests ensure our quality Engineering An application specific supportfor the evaporator type choice,the calculation of the requiredheating power and thermalstress can be given byNORMAG. These data areimportant for a later scale-up. Exemplarily is the illustratedheat transfer, the k-value, de-pending on various factors,e.g. the feed rate.
Options
Auf dem Steine 4 · D-98693 Ilmenau · www.normag-glas.de Tel.: +49 (0) 3677-2079-0 · Fax: +49 (0) 3677-2079-20 · [email protected]
Auf dem Steine 4 · D-98693 Ilmenau · www.normag-glas.de Tel.: +49 (0) 3677-2079-0 · Fax: +49 (0) 3677-2079-20 · [email protected]
Example distillation: The feed from the vesel O1 isfed by the pumpe P01 into thecolumn K01/2 and rinsescounter-current to the upstream-ing vapor into the the falling filmevaporator W01. The remainingliquid is collected in the sump ofthe falling film evaporator,pumped with the NORMAG-pump S01 onto the evaporatortube and is then partially andwell controlled evaporated. Bythis evaporation the columnpressure difference is controlledwith respect to the sump tem-perature by thermostate TD2 andthermofluid temperature by TD1to ensure a sensitive and wellreproducable evaporation. The sump product will be drawnby an overflow in the falling filmevaporator via cooler W04 andpump P02 in the vessels B04/05.The sump volume is small com-pared to the column volume.Cause of this the product will beonly for comparably short timethermally stressed and, in addi-tion, the column equilibrium ismuch quicker adjusted. Typical applications: - Lab and Experimental hall
- for thermally sensitive pro- ducts - for high reproducability - for scale-up
- Production Juice, milk, Aroma recovery,various chemicals & pharma-ceuticals
Technical specification: Capacity: 0,1 l/h up to 50 l/h 0,02 m² up to 0,5 m² Operation temperature: Up to 200 °C Operation pressure: appr. 10 mbara up to 1 bara Energy: Power: 230/400 VAC, 50/60 Hz Water: min. 1 barg
Operation and Applications
