Operation Principle

System is ideally suitable for separation of heat sensitive products at high vacuum and temperature. The system has a kettle on which a falling film calendria / reboiler and distillation column is mounted. The feed material is taken in the kettle. The recirculation pump recirculates the feed material from the kettle in to the falling film calendria where the product vaporizes. The recirculation pump recirculates the feed material from the kettle in to the falling film calendria where the product vaporizes. The liquid and product vapors enters back in the kettle. The concentrated liquid falls back in to the kettle, the product vapor rise in to the packed column. The packed column is provided structure packing for minimal pressure drop through which the vapor rises in to the condenser. The vapors are condensed in the condenser. Part of the distilled product can be sent back as reflux if required and balance is the product.

The advantages of the system are as follows :- No heating in the kettle hence no thermal degradation due to liquid head. Since vaporization / heating is in falling film the liquid exposed to high vacuum hence very low thermal degradation. Recirculation pump ensure constant wetting of falling film evaporator tubes hence no dry spots. Complete product can be stripped out of feed as system volume required for pump operation is minimum. System robust economically with minimum moving parts may replace more expensive scraped surface evaporators. Operating vacuum can be up to 1 - 2 mm. Hg. and temperature up to 300°C. The system can be operated continuously if required. Industry : Bulk Drugs, Intermediates, Specialty Chemicals, Flavor/ Fragrance, Resins, Petrochemicals.

These systems are pre assembled or site assembled Distillation system that are custom engineered to meet your specification. These system can be Pilot / Semi or Full scale production units. The system may contain all equipments including Columns, Heat Exchangers, Pumps, Vessels, Piping, Valves, Electricals, Instrumentation, Structural shed etc. As single source supplier we can provide you with following services. 1) Process Design With Performance Guarantee. 2) Detailed Engineering. 3) Project Engineering. 4) Supply of all Hardware. 5) Commissioning. 6) Continued service and advice.

We can offer following Distillation solutions.

• Distillation-Continous, Batch under vacuum, atmospheric or pressure.
• Azeotropic Distillation.
• Extractive Distillation.
• Steam stripping.

Due to our experience in other areas namely,

• Evaporation.
• Mixing.

We can provide complete solutions to difficult separation applications. Pilot trials can be offered.

Industry:
Bulk Drugs, Intermediates, Speciality Chemicals, Flavor / Fragrance

Evaporator operates on "thermo-siphon" principle. The operation of this evaporator is straightly forward. Feed enters from the bottom of the calendria. As the liquid rises up the external heat of system or other heat source preheats and then vaporizes the feed. The vapor or steam generated during boiling helps the liquid & vapor to flow upwards and as more & more vapors are formed it presses the liquid in to a thin film on the internal surface of the tube in a form annular ring. This film rises and simultaneously up ward motion of vapor & liquid gives a turbulence in the liquid enhancing the heat transfer coefficient. The vapors and liquid formed in the calendria enter in to centrifugal cum mist separator, where the vapor rises through the top and is condensed. The concentrate falls from the bottom.

Key Advantages

• The evaporator operates at a temperature difference < 10-12° C.
• Residence time in these units are in few minutes for single pass operation.
• Reticulation loop can provided to provide adequate wetting of tube to prevent dry spots.
• Multieffect evaporators can be provided for steam economy or better wetting rates.

M.O.C. :-Carbon steel / SS 304 / SS 316 or higher alloy. Design Code :- ASME / TEMA

Industrial Applications:

1)Chemical
2) Bulk drugs
3)Intermediates
4) Speciality chemicals
5)Flavor/Fragrance
6) Resins & Petrochemicals