MVR Multiple Effect Evaporation System , Multiple Effect Vacuum Evaporator For Salt

Easy to Operate Multi Effect MVR Evaporator for Pharmaceutical Wastewater Sodium Chloride

Process description – Example Parallel flow principle

The solution enters the evaporator circuit of the first stage. Here it mixes with the circulated solution and is heated in heater H with steam. In the evaporator V1, solvent (water) evaporates while cooling the solution to the boiling temperature. The solution then flows to the second stage, which is operated under reduced pressure and thus at a lower temperature. The vapour generated in the first stage is used as a heating medium for evaporation of the solution in the second stage. This process can be repeated several times depending on the boiling point elevation of the solution and existing frame conditions. The vapour of the last stage is condensed via cooling water. If salt shall be crystallized in the plant, further evaporation concentrates the solution to such an extent that crystals are formed. If desired, the crystals in the suspension can then be separated from the solution and dried.

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:

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