Understanding the Evaporation Process of Mechanical Evaporators

From nature to industries, evaporation is used everywhere. But wait, did you ever wonder about evaporators’ need in industrial applications?

If yes, then you are on the right page. This blog focuses on the meaning of the mechanical vapour recompression evaporator, popularly known as the MVR evaporator, and its evaporation process. Let’s get started.

What is MVR Evaporator?

MVR evaporators are devices or industrial equipment that vaporizes liquid by increasing the pressure and temperature with the help of mechanical energy. MVR evaporators use latent heat to complete the evaporation process, which allows them to minimize energy consumption while delivering higher efficiency and quality.

They are used in several industries but are highly popular in chemical, food and beverages, pharmaceutical, and wastewater treatment industries. MVR evaporators of Thermosag India Pvt Ltd, an established manufacturer of industrial process equipment and fabricated components, play a crucial role in industrial applications that require managing wastewater volumes or dealing with heat-sensitive substances.

Evaporation process of MVR evaporators

Now that you know what an MVR evaporator is, let us briefly understand the mechanical evaporation process.

Starting with the literal meaning, evaporation refers to the process of boiling volatile liquid molecules, ultimately transforming those components into vapour. Continue reading to understand the standard approach of mechanical evaporators purchased from MVR evaporator manufacturers in India.

• The feed pump sends wastewater to the circulating stream via a heat exchanger, where an adequate amount of heat is transferred from the hot condenser to a cold feed to treat wastewater.
  
  
• The cycle of transferring effluents from a separation tank to an orifice plate from a condenser by a pump and back to the separation tank begins. Finally, latent heat is transmitted from the heat exchanger to the wastewater.
  
  
• The orifice plate then reduces the pressure of the flowing stream, whereby the downstream force is sufficient to let the stream flash into vapour and liquid components.
  
  
• In the separation tank, vapour, and liquid are separated, followed by the steam exit from tank’s bottom to flow towards the recirculation pump. The evaporated steam then moves towards the compressor by departing from the top of the tank.
  
  
• The mist pad on top of the tank removes tiny liquid droplets from the vapour.
• The vapour compression takes place with the help of a vapour compressor, ultimately increasing the pressure and temperature.
  
  
• The vapour is then sent to the heat exchanger, where the latent heat is transferred to the effluents in a recirculation loop.
  
  
• The condensate tank separates persisting vapour received from the significant heat exchanger, which is further transferred to the feedstock heat exchanger. Finally, the incoming effluents receive sensible heat.
  
  
• The residue valve purges effluent from the recirculation loop when the wastewater is at the desired concentration. Depending on the requirements, electric heaters can either add energy or remove it with the help of a steam relief valve.

Wrapping up

MVR evaporators manufactured by Thermosag India Pvt Ltd work on the dynamic or positive displacement principle. Even though MVRs are a little expensive compared to traditional evaporators, they are a beneficial long-term investment with high returns, including lower operational costs in the long run and higher energy saving from the beginning.

It is an effective option for several industrial applications such as concentration, distillation, and crystalization.