GEA Process Engineering Ltd – evaporators for dryer project
When Fonterra commissioned GEA Process Engineering to design, build and install the world’s largest dairy spray dryer, GEA wasted no time calling NDA. The Darfield plant can process 30 tonnes of whole milk powder an hour, and NDA were contracted to manufacture the vessels needed for the evaporation.
A number of vessels had to be made, including five 60-tonne calandrias. Each calandria contained more than 30,500 metres of evaporator tube. This added up to more than 1900 individual tubes – each of which were precisely fitted into the vessel and welded to the tube plates at each end, before being polished and tested.
With this dryer complete, Darfield can process 2.2 million litres of milk every day, enabling New Zealand milk to be shipped to markets all over the world.