Multi Effect Force Circulation Evaporating of Beverage Evaporator System
Multi Effect Evaporator
In a single effect evaporator steam is supplied for heating the liquid. The total heat is not transferred from the steam. So the rest of the heat is wasted.To use the heat efficiency, connections evaporator are made so that vapor from one effect can serves as the heating medium for the next effect.
The dilute feed enter the first effect where it is partially concentrated; then it flows to second effect for additional concentration and soon. The final concentration is done in last effect.
In the first effect raw steam is fed in which the vapor pressure is highest P1,The second effect has p2.
P1>p2. >p>.…..P,n is the number of effects. This pressure gradient is maintained by the vacuum pump and the condenser.
Depending on lower in vapour pressure,boiling point of liquid also lowered as liquid move.
Structure
Multiple-effect falling film evaporator consists of (first-effect, second-effect, third-effect)separators and evaporators and pre-heaters,condenser and vacuum pump, feeding pump,circulation pump, discharge pump, condensed water pump, pipeline and fittings, etc. It is equipped with vacuum gauge, thermometer,pressure gauge,and so on.
Characteristic
1. Evaporation capacity: From 500Kg/h to 80T/h
2. Material: Stainless steel 304 or Stainless steel 316L;
3. Full closed process, fast and low temperature evaporation;
4. Inside pipes are mirror polishing seamless sanitary pipes, so material is not easy to paste on the pipe. It's easy for cleaning;
5. Low evaporation temperature:part of secondary steam can be inhaled into single-effect heater through spray type hot pressure pump. This would make full use of the heat and the evaporation temperature is low.
6. Large concentration ratio: adopt falling film evaporation, which make the material liquid with larger viscosity be easy to flow and evaporate, hard to scale, short concentration time.
7. This equipment can realize automatic production, intellectual system management.
8. Can be designed into different technological process according to the different characteristics of the materials and different users' requirements.
Application
Multiple Effect Evaporators are widely used in the following areas as per the requirement.
Effluent Treatment: Industries like Chemical, Pharmaceutical, Textile, Dyeing, Breweries, Automobiles, Milk, Food industries etc, generates process effluents which are harmful to the environment. These effluents generally consist of water in huge amount and waste(contaminants). By evaporating the water from the effluent using MEE system results in the recycling of water.
Desalination: Reject of RO (Reverse Osmosis) have a huge amount of water. With MEE the water can be recycled.
Chemical Industry/ Pharma Industry: For the production of product the desired concentration is required or desired material need to be separated. Using MEE system desired concentration is achieved.
Milk Industry: Milk can be concentrated in the MEE system.
Sugar Industry: Sugar cane juice can be concentrated with MEE system.
Food industries: Tomato juice concentration, Sausages, Fruit juice concentration can be done in MEE system.
Advantages: Evaporation can be achieved with low consumption of heat source.
Typical three effect falling film evaporator specifications and technical parameters:
|
Parameter/ Specifications |
HP-3.0 | HP-4.5 | HP-6.0 | HP-9.0 | HP-12.0 | HP-15 | HP-20 | HP-24 | HP-30 | HP-50 | |
|
Evaporation capacity(kg/hr) |
3000 | 4500 | 6000 | 9000 | 12000 | 15000 | 20000 | 24000 | 30000 | 50000 | |
|
Consumption of raw steam(kg/hr) |
900 | 1350 | 1800 | 2700 | 3600 | 4500 | 4500 | 7200 | 9000 | 15000 | |
|
Vacuum degree of each effect |
First Effect |
0 | |||||||||
|
Second Effect |
448 | ||||||||||
| (mmHg) |
Third Effect |
640 | |||||||||
|
Evaporation temperature of each effect |
First Effect |
99 | |||||||||
|
Second Effect |
76 | ||||||||||
|
Third Effect |
53 | ||||||||||
|
Steam pressure for evaporation(MPa) |
0.6-1.0(Absolute pressure) | ||||||||||
| Solid content in feed(％) | 6-7(Corn pulp example) | ||||||||||
| Solid content outlet(％) | 42-48(Corn pulp example) | ||||||||||
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