The objective of evaporation is to concentrate a non-volatile solute, carrying out the elimination of a volatile compound. Water is the volatile
compound used in most evaporations.
The rising or falling film evaporators are very useful if high temperatures can degrade the product that we want to concentrate, so these
evaporators work at less temperature. They can be used, for example, for concentration of fruit juices, milk and milk products, effluents, etc.
Basically, the unit consists of the following circuits:
The feed circuit that consists on a feed pump that introduces the product in a double jacket column, which has temperature sensors. The product
leaves the tank through a cyclone placed at the output of the column and it is collected in a 500 ml graduated vessel. The vessel is also connected to a 10 l. tank for the storage of the concentrated product. This last tank is connected to the feed tank for its recirculation.
The distillation circuit starts at the top of the column, where a joint with a pressure meter has been assembled. It is also connected to the cyclone to separate the concentrated product and the distilled one that goes through a spiral condenser. The distilled product is stored in a graduated vessel that is connected to a 10 l. collection tank. This last one is connected to the feed tank for its recirculation in a continuous process.
The steam circuit, introduced in the external jacket of the column, contains a pressure meter for the control of the temperature of steam. This
meter is connected to a high-pressure cutout control that opens or closes a control electrovalve for the steam supply.
The vacuum circuit consists on a vacuum pump; one trap placed at the output of the condenser and other trap placed at the output of the
cyclone.
Specifications:
- Anodized aluminium structure and panels in painted steel.
- Main metallic elements in stainless steel.
- Diagram in the front panel with similar distribution to the elements in the real unit.
- 3 Evaporation double jacket column, with a heating surface of 0.122 m , 30 mm of internal diameter, 60 mm of external diameter and 1300 mm of length.
- Membrane dosing pump, maximum flow 15 l./h, with flow control.
- 3 Single effect vacuum pump, maximum flow 3m /h and maximum vacuum of 150 microns.
- Three 10 l. tanks (for feeding, concentrated and evaporated).
- Two 500 ml. graduated vessels for the storage of concentrated and evaporated product.
- Coil coolant with length of 400 mm.
- Heating resistance, range: 300 W.
- Pressure safety cut out for pressure control in the column.
- 10 Temperature sensors, type “J”.
- 1 Flow meter (0.2 to 2 l./min).
- 2 Manometers (0 to 2.5 bar).
- Solenoid valve.
- The unit incorporates wheels for its mobility.
Electronic console:
- Metallic box.
- Temperature sensors connections.
- Digital display for temperature sensors.
- Selector for temperature sensors.
- Pumps switches.
- Heating resistance switch.
- Heating resistance temperature control.
- Solenoid valve connection.
- Pressure safety cut out connection.
- Cables and Accessories, for normal operation.
- Manuals: This unit is supplied with the following manuals: Required Services, Assembly and Installation, Starting-up, Safety, Maintenance &
Practices Manuals.
- Optional accessory (not included in the supply):
EPDB. Falling Film Evaporator (for adding to EPAB).
- See more at: https://batavialab.com/rising-film-evaporator-detail-419687.html#sthash.k4L2FPGM.dpuf