The medium to be thickened is thickened via vertically aligned tube bundles. The substance forms a thin film on the inside of the tube and flows downwards with gravity.

Vaporization of the more volatile medium on the heating surface produces steam, which is channeled in the tubes in co-current with the boiling liquid.

The vapor phase is then separated from the liquid phase in the lower evaporator chamber via integrated droplet separators or cyclone separators. Steam is generally used to heat the evaporator on the shell side.

• Concentration of moderately fouling liquids and wastewater

• Volume reduction of liquid-liquid mixtures

• Recovery and separation of solvents like alcohols

• Separation of multi-component mixtures and separation of water

• Recovery of valuable materials

• Dimensions: 50 – 10.000 sqm

• Feed rates: 500 kg/h – 150.000 kg/h

• Operating pressure: ≥ 80 mbar abs.

• Heating temperature: ≤ 200°C

• Operating pressure: -1 / +20 bar(g)

• Viscosity: ≤ 250 mPas

For optimization, multiple evaporator stages can be integrated into a single unit, significantly increasing the evaporation performance.

To ensure efficient operation and consistent evaporation performance, regular washing cycles should be carried out depending on the medium. During planned downtimes, additional manual cleaning can be performed. The use of cleaning chemicals is also a feasible and effective option if needed.

For media that are particularly prone to heavy fouling, there is a risk of complete blockage of the tubes. In such cases, cleaning is often no longer possible, and the affected tubes must eventually be sealed off.

As an alternative, GIG Karasek offers the plate falling-film evaporator.

GIG Karasek also provides other evaporator designs in tube design, including:

• Rising film evaporator

• Forced circulation evaporator

• Natural circulation evaporator

However, due to significantly higher operating costs and lower evaporation rates, these technologies are now rarely used.

In addition, we supply condensers, heat exchangers, preheaters, and other components in tube construction.