Multi-stage evaporation plants

LEVEL BY LEVEL HALVED ENERGY REQUIREMENT

In multi-stage evaporation, the vapor from the liquid medium is used to heat the subsequent stages. As a result, the use of primary steam can be significantly reduced and the system operated cost and energy efficient.

GIG Karasek has been a leading supplier of the following concepts for years:

FALL FILM – MULTI-STAGE EVAPORATION

FORCED AND NATURAL CIRCULATION – MULTI-STAGE EVAPORATION

RISING FILM – MULTI-STAGE EVAPORATION

 

applications

PULP INDUSTRY

  • Concentration of sulfite and sulfate liquor
  • Concentration of pulp for pulp production for the regenerated fiber industry
  • Concentration of lignosulfonates
  • Concentration of xylose
  • Concentration of bleaching water
  • Recovery of spinning bath solutions from the fiber industry

GENERAL APPLICATION AREAS

  • Recovery of solvents & alcohols
  • Separation of water, solvents, alcohols and much more.
  • Recovery of recyclables
  • Volume reduction of liquid-liquid mixtures
  • Separation of multicomponent mixtures

OTHER INDUSTRIAL APPLICATIONS

  • starch industry
  • sugar industry
  • salt works
  • sewage
  • Chemical industry
  • Pharmaceutical Industry

advantages of Multi-stage evaporation plants

  • Very high evaporation capacity possible (up to 500 t / h)
  • individually optimized energy consumption
  • Reduction of energy costs by using several stages
  • Wide field of application of multi-stage vacuum systems
  • Ideal for mixtures with high boiling point increases
  • Very high condensate purities through the use of secondary heating surfaces

 

functionality of Multi-stage evaporation plants

Multi-stage evaporation is one of the most widely used processes for evaporation plants, especially with high evaporation capacities required. The principle is simple. It is the first stage heated with live steam, the subsequent stages use the Brüdendampf the previous stage for heating the heating surfaces. With an increasing number of stages, so the use of live steam can be significantly reduced.

However, the number of stages can not be increased arbitrarily, since the maximum temperature gradient is usually predetermined. On the one hand, the temperature sensitivity of the medium and the maximum available heating steam pressure play a role, on the other hand, the cooling water temperature.

Thus, an optimum between energy and investment costs must be found, which is determined in close cooperation with the customer. An essential role is played by the circuit concept in order to find the optimal design of a system.

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