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MEE Multiple Effect Evaporation System

1 set
MEE Multiple Effect Evaporation System
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Name: Multi Mvr Evaporator Crystallization
Applicable Industries: Manufacturing Plant, Food & Beverage Factory
Evaporation Type: Falling Film
Material: SUS304/SUS316L
Usage: Large Operational Capacity Liquid
Power Source: Steam & Electricity
Core Components: PLC, Engine, Bearing
Feature: Energy Saving
After Warranty Service: Facility Installment And Commission
Warranty: 1 Year
High Light:

SUS304 Multiple Effect Evaporation System


OEM Multiple Effect Evaporation System


Falling film MEE evaporator

Basic Infomation
Place of Origin: Jiangsu,China
Brand Name: HANPU
Certification: ISO,CE
Model Number: HP-MEE
Payment & Shipping Terms
Packaging Details: Bulk
Delivery Time: 30days
Payment Terms: T/T, L/C, D/A, D/P, Western Union
Supply Ability: 1 set/month
Product Description

New technology of black liquid concentration by vapor compressor heating



At present, multi effect evaporation is widely used in pulping alkali recovery evaporation. In the multi effect evaporation system, the more effective the evaporator is, the better the economy is, but the investment cost is also increased simultaneously. According to different requirements of evaporation water, 5-7-effect evaporation system is generally used at present, which has good economy.


In recent years, with the maturity of mechanical vapor recompression (MVR) technology. This technology has been widely used in wastewater treatment (including chemical pulp black liquor, APMP & BCTMP and other chemical mechanical pulp wastewater), food industry, seawater desalination and other fields.


1. MVR Technology

MVR technology is to compress the secondary steam of the evaporator by mechanical method, increase its pressure and temperature, increase its enthalpy, and then send it back to the heating chamber of the evaporator to be used as heating steam, so as to keep the feed liquid in boiling state, while the heating steam itself condenses into water. Compared with the multi effect evaporation technology, MVR technology compresses and recycles all the secondary steam and recovers the latent heat, so it is more energy-saving than the multi effect evaporation technology.


Application of MVR Technology:


When the concentration of evaporated liquid is raised and its boiling point is raised within a certain limit, for example, when the concentration of evaporated black liquid is below 20%, the boiling point is raised no more than 1.5 ℃.


It is used in the areas or enterprises where the electricity price is cheap and the heat energy is expensive.


2. Application of technology in black liquor evaporation of pulp

Taking the evaporation of wheat straw pulp black liquor as an example, the combination evaporation process of MVR technology and multi effect evaporation was compared with the multi effect evaporation process. The details are as follows.


2.1 main parameters and evaporation scheme


The results show that the flow rate of dilute black liquor is 128.6t/h, the temperature of dilute black liquor is 70 ℃, the concentration of dilute black liquor is 10%, the concentration of concentrated black liquor is 45%, and the evaporation water is 100t / h. The multi effect evaporation process is 5-effect evaporation station, and the combined evaporation process is MVR pre concentration + 5-effect evaporation station.


2.2 Operation

The operation of the two evaporation processes for the treatment of wheat straw pulp black liquor is shown in the table.

Operation of two evaporation processes for treating paper pulp black liquor


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.



Advantages of MVR Technology:

After start-up, there is no need for fresh steam, or a small amount of fresh steam is consumed, so the operation cost is low.

Simple structure, single effect operation, simplify the pipeline, instrument, electrical system.

Easy to start, simple operation, stable operation, less maintenance.

It occupies a small space and has few utilities. In general, there is no need for condenser and cooling tower

MEE Multiple Effect Evaporation System 0


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MEE Multiple Effect Evaporation System 1


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MEE Multiple Effect Evaporation System 2MEE Multiple Effect Evaporation System 3



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