High efficient multiple effect vacuum evaporator for
seawater/industrial water chinese supplier
MVR Description
The MVR evaporator compresses the low-temperature steam through the
compressor, increases the temperature and pressure, and increases
the enthalpy, and then enters the heat exchanger for condensation
to make full use of the latent heat of the steam.
Except for the start-up, the secondary steam from the evaporator
without raw steam during the entire evaporation process is
compressed by the compressor, the pressure and temperature
increase, and the enthalpy increases, and then it is sent to the
heating chamber of the evaporator to be used as heating steam. Keep
the material liquid in a boiling state, while the heating steam
itself condenses into water.
In this way, the previously discarded steam is fully utilized,
latent heat is recovered, and thermal efficiency is improved. The
economy of raw steam is equivalent to 30 effects of multi-effect
evaporation.
Main features:
The MVR evaporator energy saving technology is the most advanced
international technology of evaporator, only need few live steam
(When start evaporator need few live steam, during normal running
almost no need live steam), which greatly reduce business operating
costs, reduce environmental pollution.
Due to adopt compressor supply heat source, there is little
temperature difference which compared with traditional evaporator,
and can achieve moderate evaporation,greatly improved product
quality and reduce fouling.
No need condenser or only need small size condenser, the structure
and process are quite simple, it can be full automatic operation,
continuous running, safety and reliable.
This evaporator internal system equipped with CIP clean pipeline,
which can achieve clean in place, easy to operate and without dead
angle.
Liquid material can be evaporated under low temperature (50-100℃)
in this evaporator, the liquid material is uniform and without
running material, not easy coking, material heating denaturation is
minimal.
Due to use of 100% recycling secondary steam latent heat,
completely avoid the use of live steam, so greatly reduced steam
consumption.
For heat-sensitive materials can be used with vacuum pump, which
can be done in close to absolute pressure under vacuum, so as to
realize low temperature evaporation, the minimum evaporation
temperature can be 50 ℃.
Simple process control and automation——Because of the small amount
of fluid retention, the falling film evaporator can be change
according to different vacuum degree/feeding capacity/
concentration/ temperature , which is the basic conditions for
stable quality of products.
In summary the adventages of MVR system are as follow
1.Energy saving: high thermal efficiency, energy saving, lower
power consumption,the energy consumption is about 1/6To 1/5 of
traditional evaporator. significantly reduc the operation cost
2.Environmental protection
3.Low operating costs: only the traditional evaporators One-third
to half
4.Evaporating temperature is low, difficult to corrosion stainless
steel equipment, difficult to scale, very suitalbe for
heat-sensitive material
5.Automatic: The entire system realized automatic control from the
filling, preheating, evaporation, cleaning, maintenance and other
steps of the. Avoid human error, reduce the labor costs, improved
product quality
6.Small footprint
7.Avoiding the purchase of boilers, chimney construction investment
and maintenance costs
Operation cost comparison
The operation of the two evaporation processes for the treatment is
shown in the table.
Operation of two evaporation processes for treating paper waste
water.
| item | 5 effect station | combined evaporation process |
| MVR pre concentration | 5-effect evaporation station |
| Evaporation water (t/h) | 100 | 64.28 | 35.72 |
| Incoming concentration(%) | 10 | 10 | 20 |
| Out concentration(%) | 45 | 20 | 45 |
| Evaporator area(㎡) | 10000 | 8500 | 4000 |
| Condenser area(㎡) | 800 | / | 300 |
| Consumption | Steam (t/h) | 25 | / | 9 |
| Electricity(kWh/h) | 500 | 1600 | 180 |
| Water(t/h) | 900 | / | 350 |
| Running cost | RMB/hour | 4500 | 960 | 1633 |
| RMB/T water evaporation capacity | 45 | 25.93 |
| RMBx10000/Day | 10.8 | 6.2 |
| RMBx10000/Year(340days) | 3672 | 2115 |
Note:In operation cost estimation:steam 150rmb/t,electricity 0.6
rmb/kWh,water 0.5rmb/t.
The investment of combined evaporation process equipment increased:
evaporator (2500 m2) 375x10000 RMB; MVR compressor 400x10000rmb,
total 775x10000 RMB
Annual operating cost reduction of combined evaporation process:
3672-2115 = 1557 (10000RMB)
Investment increase payback period of combined evaporation process:
755 ÷ 1557=0.5year
It can be seen that taking the scale of 100t / h as an example, the
combined evaporation process can recover the increased investment
in half a year, and save 1557 (10000 RMB) every year in the future,
with considerable economic benefits.
The handling capacity can be up to 100T/h, with advantages such as
small floor space, compact structure, stable operation and so on.
Working principle drawing
Our Production Capability and certificate
