Classical multi-stage evaporators  and multi-stage evaporators with thermal vapour recompression (TVR) have been the standard in the dairy industry for many decades. TVR evaporators can typically reduce one or two evaporation stages compared to classical evaporators. While specific steam consumption is reduced by 50 %, fossil fuels are still used. 
 

Falling film evaporators with mechanical vapour recompression (MVR)

Evaporators with mechanical vapour recompression (MVR) operate using a high-pressure blower. The recompressed steam is used to heat the product. An MVR evaporator can function at relatively low evaporation temperatures, ensuring that the product maintains the same evaporation temperature throughout all stages. Thanks to the low thermal stress, concentrated products of superior quality can be produced. Additionally, evaporation costs are significantly lower compared to other designs, and steam and cooling towers are no longer necessary for production.
 

Conversion of classical and TVR evaporators into MVR evaporators

Bucher Unipektin is your partner for modifying most existing evaporators to an MVR type. The existing multi-stage plants are adapted so that all the multi-stage evaporation columns remain in place but are configured for parallel heating. When evaluating the evaporator and calculating the return on investment, it’s essential to consider the costs of steam, electricity, and cooling water.
 

Milk and whey products

Thanks to our extensive experience in modifying evaporators, Bucher Unipektin is your ideal partner for MVR solutions for the concentration of:

–    Whole and skimmed milk
–    Whey
–    Condensed milk
–    Lactose