ROTARY EVAPORATORS >> JUMBO ROTARY 

Rotary Film Evaporator is a very regular usage product in the R&D of chemical & pharmaceutical industry. It is also being used nowadays for manufacturing purpose for high value pharmaceutical & specialty chemical products. The existing rotary film evaporators, which are used, are with spherical evaporating flasks. What happens is when the requirement of volume for process increases it is practically very difficult to handle the sizes beyond 50 Liters.

Chemical reactors are cylindrical in shape with a particular L/D ratio in general, which are given for a particular reaction surface area. The cylindrical vessel has a higher surface area than spherical vessel. This prompted us to think in the direction; why only spherical vessel is used when we can exploit the advantage of cylindrical shape evaporation flask in a rotary film evaporator.

Thus the innovation for a better rotary film evaporator with better efficiency in terms of rate of evaporation was done. The results showed that rate of evaporation was enhanced to 20% as compared to conventional spherical shaped rotary film evaporator. Also the mechanical stability was far superior to spherical vessel, inclined drive rotary film evaporator.

Then we designed the largest Rotary Film Evaporator Jumbo Rotary, Capacity 400Ltrs. made from Borosilicate Glass 3.3 cylindrical evaporation flask. In spherical flask rotary film evaporator the drive is inclined and the flask is held from it's neck only. Thus a inclined cantilever type of loading happens on the rotating assembly. This is highly unstable mechanically as for the same neck size of flask, higher stresses develop in the flask neck compared to a horizontal drive simply supported flask as in the case of cylindrical rotary film evaporator. The cylindrical flask of the jumbo rotary evaporator is also held by the neck, but the drive centerline is not inclined, instead it is horizontal.

The rotating flask is also supported axially at two cross-sectional circumference over it's whole length, thus making the loading effectively a simply supported one and not a cantilever type. This reduces the stress on the neck of the flask and is the only safer solution for making higher size rotary film evaporator. Another advantage of the cylindrical flask is it's lower diameter compared to a spherical flask for a particular volume, which is a very critical factor for glass MOC as the pressure rating goes down drastically with the increase in diameter. Also material removal & cleaning becomes easier from the cylindrical rotary film evaporator. it is simply opening the quick release coupling from one end. The material can be easily scooped out where as in spherical rotary film evaporator the whole flask is to be separated out & spherical flasks becomes too bulky and handling becomes very difficult for sizes above 100Ltrs.

This development has overcome the constraint of the size in Rotary Film Evaporators from laboratory scale applications to industrial applications for sizes above 100Ltrs. i.e. Up to 800Liters with a diameter of 800mm !!

 
TECHNICAL SPECIFICATIONS  MODEL : GRFE 100 J

Cylindrical Flask :
Diameter           = 600mm
Capacity           = 100Ltrs.

Heating Bath :
MOC SS 316
Electrical Heaters 5KW X 3 No. = 15KW
MOC  SS 304 with flameproof connections

Canopy
Polycarbonate Canopy

Drive Motor :

Power 5HP (Flameproof),  50 Hz, 415 V, 3 Phase motor.
RPM : 2-50 RPM, Variable

Controllers and Indicators :

#  Bath Temperature controller with digital temperature indicator (Range : 0 - 300°C, RTD Sensor)
#  Rotation controller with digital RPM indicator (VFD Type)
#  Vapour Temperature Indicator (RTD Sensor)
#  Process/Operation time indicator

Glass Specification :

#  All the contact parts are made of Borosilicate 3.3 glass / PTFE
#  Heat Exchanger 2.5 m² heat transfer, 9" small diameter.
#  Receivers 50Ltrs with Drain, Vacuum & Vacuum Release valve
#  Trap SS304 enclosed with 10Ltr. spherical glass vessel.
#  Seals & Gasket PTFE & GFT
#  Tubular Structure & Structure parts SS304

Overall Dimension of the Unit (Approx.)
2000 (L) X 1000 (W) X 2000 (H)

TECHNICAL SPECIFICATIONS MODEL : GRFE 400 J

Cylindrical Flask
Heating Bath

Length              = 1800mm
Diameter           = 600mm
Neck Diameter  = 225DN
Capacity           = 400Ltrs.

Length              = 1500mm
Breadth            = 800mm
Height              = 410mm
MOC SS 316
Electrical Heaters 9KW X 3 No. = 27KW
MOC  SS 304 with flameproof connections

Canopy
Polycarbonate Canopy

Drive Motor
Power 5HP (Flameproof),  50 Hz, 415 V, 3 Phase motor.
RPM : 2-50 RPM, Variable

Controllers and Indicators

  • Bath Temperature controller with digital temperature indicator (Range : 0 - 300°C, RTD Sensor)
  • Rotation controller with digital RPM indicator (VFD Type)
  • Vapour Temperature Indicator (RTD Sensor)
  • Process/Operation time indicator

Glass Specification

  • All the contact parts are made of Borosilicate 3.3 glass / PTFE
  • Heat Exchanger 2.5 m² heat transfer, 9" small diameter.
  • Receivers 50Ltrs with Drain, Vacuum & Vacuum Release valve.
  • Trap SS304 enclosed with 10Ltr. spherical glass vessel.
  • Seals & Gasket PTFE & GFT
  • Tubular Structure & Structure parts SS304

Overall Dimension of the Unit (Approx.)
3600 (L) X 1500 (W) X 2500 (H)

 

 

 


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