Falling Film Evaporator 50L Ethanol Vacuum Distillation
Description of Falling Film Evaporator
The function of single-effect falling film evaporator is to
separate the ethanol from material and condense and recover it
through reduced pressure vacuum and evaporation. The single-effect
falling film evaporator used for ethanol solution production is
different from the general single-effect falling film evaporator
used for aqueous solution production.
Parameter of Falling Film Evaporator
| Model | FFE-20 | FFE-50 | FFE-100 | FFE-200 | FFE-500 | FFE-1000 |
| Evaporation speed (l/h) | 20 | 50 | 100 | 200 | 500 | 1000 |
| Heating area (㎡) | 1.2 | 3 | 5 | 12 | 25 | 50 |
| Condensing area (㎡) | 1.5 | 5 | 7.5 | 16 | 30 | 60 |
| Feeding pump (kw) | 0.55 | 0.55 | 1.1 | 1.5 | 1.5 | 1.5 |
| Discharge pump (kw) | 0.55 | 0.55 | 1.1 | 1.5 | 1.5 | 1.5 |
| Discharge pump (kw) | 0.55 | 0.55 | 1.1 | 1.1 | 1.5 | 1.5 |
| Water ring vacuum pump (kw) | 0.75 | 0.81 | 0.81 | 1.5 | 2.2 | 3.85 |
| Power (kw) | 2.4 | 2.46 | 4.11 | 5.6 | 6.7 | 8.35 |
| Power supply | 220V/60Hz Three-phase power,Other component could be customized |
Working Principle of Falling Film Evaporator
Falling film evaporator can be used for solutions with higher
viscosity, so the concentration of the discharged solution is
higher than that of the natural circulation evaporator. Falling
film evaporator has a large heat transfer coefficient and is not
greatly affected by changes in the heat transfer temperature
difference. It can be operated at a wide heat transfer temperature,
so the heat transfer temperature difference can be changed to adapt
to the unstable feed liquid volume. Falling film evaporator has the
advantages of compact equipment, small heat transfer area, small
amount of liquid storage, not easy to scale, and strong
adaptability to easy foaming solutions.
Application of Falling Film Evaporator
Single-effect falling film evaporator is widely used in food,
dairy, chemical, pharmaceutical, biological
engineering,environmental protection engineering and corn deep
processing, such as for aqueous solutions, organic solvent
solutions, fruit and vegetable juices, milk, eggs, vitamin C,
collagen , Tea immersion liquid, sodium glutamate and other
evaporative concentration. It is especially suitable for
evaporative concentration of heat-sensitive materials, and the
beneficial elements of the material can be protected to the
greatest extent during the heating and evaporation process.
Operation of Falling Film Evaporator
(1) Open the cooling circulating water valve ①. Turn on the vacuum
pump P04.
(2) Turn on electric steam boiler F01 (refer to Appendix 1 for use
of electric steam boiler).
(3) When the vacuum pressure reaches -0.06mpa or more, open the
feed valve ⑦ and the feed pump P01. The liquid level in the
separator can generally reach the middle of the sight glass. After
reaching the liquid level, open the discharge pump P02 and the
return valve ③. Adjust the opening of the return valve ③ to make
the liquid level balanced.
(4) After the inlet and outlet materials are balanced (observe the
L1, L2 scales, and the valve is adjusted to make the flow rate the
same), open the steam valve ②, heat the materials in the system,
and adjust the opening degree of the steam valve ② to meet the
evaporation speed requirements.
(5) When the material concentration meets the requirements
(concentration needs to be sampled and tested), open the discharge
valve ⑤, close the return valve ③, and pour the concentrated liquid
into the concentrated liquid tank. Due to continuous evaporation
and discharge, the liquid level in the intermediate tank V01
gradually decreases, and the material liquid in the intermediate
tank V01 needs to be replenished in time.
(6) When the condensate reaches the sight glass level in the
condensate collection tank V02, start the condensate pump P03,
drain the condensate, and turn off the condensate pump P03 after
draining.
