In the simplest of terms, evaporation is the process by which a solvent can be separated from a solution by boiling, while crystallisation makes it possible to separate the salts, in their solid state, dissolved in a solvent.

Evaporation systems in modern industry are highly complex heat transfer units in which evaporation takes place under closely controlled conditions.
These systems used to concentrate solutions and recover solvents also enable to reduce environmental pollution by reusing their concentrated fraction as a fuel or by recovering solvents for secondary uses.

Over the past years an increasing interest has been noted for problems related to the re-use of waste water and the recovery of reusable byproducts (chemicals, fuels, fertilizers).
The use of evaporators/crystallisers for the treatment of liquid waste in many chemical industries enables to recover salts of commercial grade at a relatively low cost and to recirculate optimum quality water.

At first sight, the evaporation process may appear simpler, but selection of the right system is a most important factor and must be based on sound theoretical knowledge and extensive field experience.
Thanks to its wide experience, Termokimik's Water Treatment Division is in a position to select the equipment and materials best suited to each installation, to optimize the costs and to properly evaluate the automatic control requirements.

The Company can offer the following types of evaporators of the single and multi-effect design:

- Rising, falling and combined film evaporators
- Short tube vertical evaporators
- Natural and forced recirculation evaporators

These type of evaporators - widely applied in the chemical, pharmaceutical, mining and metallurgical industries - find also an application in the pulp and paper plants and in fertiliser and food industries. Special features, such as thermocompression and mechanical recompression, flash vessels and regenerative heat exchangers are included in each basic evaporating plant. Finally, Termokimik evaporating systems afford substantial savings in steam.



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