- Brand
- FBR
- Model
- QE/500
- Manufacture year
- 1985
- Volts (v)
- 380
- Frequency (hz)
- 50 Hz
- Production capacity
- 500 Tn/ 24 hours
This 4 effect evaporator was created in order to reduce the steam, water, and energy consumptions while keeping the production unchanged. The technological principles. suited by the concentration technics are the product circulation high speed and the short period heating.
The main features
of this equipment are as follows:
- work intensive speed having high
«K" exchange coefficient factors
- lack of incrustations, therefore longer working periods without breaks
for the complete chemical washing of the plant
- possibility to reach high consistence
at forced flux in all the four stages
Besides, the
evaporator at 4 effects has the flexibility to process 2 products of a different
dry residue at the same time; i.e. 4 effects steam and 2 plus effects, separately
in product cycle.
Plant
Description
The plant is technically like the double and triple effects.
It is formed of four essential groups "1st- 2nd - 3rd- 4th effects"
that run together in quadruple effect, with the possibility to exclude one or
two effects to work respective/y in triple or double effect.
Every effect
is formed by an evaporation chamber, a tube nest and a pump-reducer-turbine (or
electric motor) group.
In the first,
third and fourth stage, the product circulation is exclusively descending while
in the second stage it is ascending and descending.
The high speed, together with the low temperature, doesn’t allow the formation of incrustations, so the concentration process can continue without breaks for long periods.
The steam
cycle is: 1st- 2nd- 3rd- 4th effect, while the product one is 4th - 3rd - 1 st
- 2nd effect.
The vacuum
values in the evaporation chambers at rate are:
- 20 cm/Hg equivalent to a
temperature of 92º C in the 1st effect
- 48 cm/Hg equivalent to a
temperature of 74ºC in the 2nd effect
- 60 cm/Hg equivalent to a
temperature of 61ºC in the 3rd effect
- 70 cm/Hg equivalent to a temperature of 40ºC in the 4th effect
A
condensation column and an auxiliary condenser, both semi-barometrical, are
used for the steam condensation. A series of staggered plates installed in the top
part, allow the water to form a liquid fog while it falls producing the steam
condensation. The water extraction is effected by means of a centrifugal pump,
operated by an electric motor. Liquid ring special pumps are installed for the
vacuum making or alternatively, an ejectors group at steam jet at two stages.
The product
extraction takes place by means of a mono pump that gets it through a photoelectric
refractometer which points out the dry residue value.