MVR Thin Film Evaporator is a new kind of evaporator with high
adaptability. It is applicable for materials of high viscosity,
heat-sensitive and materials easy to crystallize and scale, etc.
MVR compressor transforms electricity into heat through secondary
steam compressed by the high-efficient steam compressor, which can
increase the content of enthalpy. Then the secondary steam is added
into the heater to warm the materials so as to achieve its recovery
and recycling process. In this way, the evaporation and
concentration can be realized by self-circulation of the evaporator
without generating steam from outside.
Systematic components of MVR Thin Film Evaporator:
The structure is very simple with the components of scraped heater,
separator, compressor, vacuum pump, recycle pump, operation
platform, automatic control system and pipe line, etc.
1. MVR evaporator can save more than 80% of energy, 90% of cooling
water, and 50% of floor area than the traditional ones.
2. The secondary steam is used totally. The economy of fresh steam
is twenty times as efficient as the multi-effect evaporated one,
which can reduce the demand for heat from outside and cooling
resources. It is also beneficial to reduce the energy consumption
3. Due to the fact that the heat is provided by the compressor, the
temperature difference is much smaller than the traditional
evaporators. Therefore, it can greatly improve the quality of the
product and reduce scaling by mild evaporation.
4.There is no need for condenser or just a small area of it if
necessary. The structure and process is very simple. It can be run
continuously and securely by automatic operation.
5. The materials are evaporated under low temperature (evaporation
temperature: 40℃-100℃ ), which makes them even and prevents them
from running as well as coking. Meanwhile, the denaturation of the
materials can be limited to minimum during the process.
6. The scraped heater has high coefficient of heat transfer and
high capacity of evaporation. Besides, the thermal efficiency is
very high with the evaporation intensity of 200kg/m2·hr.
7.The time for heating is short which is between 5 to 10 seconds
under the vacuum condition. It is more beneficial to the materials
of high sensitivity because it can guarantee the quality of the
product by remaining every content without any breaking down
8. The range for viscosity change is wide enough. Materials of
different viscosity can all be processed with the maximal of
9.The equipment covers a small area with its simple structure. It
is convenient to maintain and easy to wash.
10.The vacuum resistance is reduced. Thanks to its unique
evaporation style, the materials being processed only form film on
the surface without accumulating on it. Therefore, there is no
possibility of vacuum offset by the liquid from other forms of
evaporation. ( The vacuum degree of other forms of evaporation only
reflects the vacuum degree of the liquid surface in the system. )
The vacuum degree shown in the system is exactly that of the
materials when being evaporated.
11.The evaporation intensity is high. The increase of vacuum degree
decreases the boiling point of the materials being processed, which
strengthens the driving force of the medium between the cold and
the hot in temperature. Meanwhile, the forced effect of the scraper
makes the liquid film faster and thinner. And the self-cleaning
function of the scraper resists the scaling on the heater surface,
increasing the coefficient of heat transfer and the capacity of
12.The time for heating is short. As the scraped evaporator is a
special falling evaporator, therefore, the materials just stay on
the heater surface for a short time in around 10 to 60 seconds. (
which is different according to its specification. ) And it is
especially suitable for processing materials of high sensitivity.
13.It is flexible for operation. The amount into the evaporator in
unit time decides the thickness of the liquid film on the heating
surface. And as the liquid film of the scraped evaporator is formed
forcibly by scrapers, the amount of the materials can be regulated
on a large scale.