Inlet solution is fed into the boiling chamber through a series of heat exchangers. The first heat exchanger extracts residual heat out of released concentrate. The second heat exchanger extracts residuel heat out of released distillate.

Already heated inlet solution enters the boiling chamber where it mixes with the solution in boiling chamber. From there the solution is circulated by the circulation pump through heat exchanger of heat pump, where it heats up, then it is brought back to boiling chamber. Upon arival to boiling chamber flash evaporation occurs. Due to high temperature of solution and high pressure drop part of the solution evaporates instantly. Unevaporated part of solution stays in boiling chamber and undergoes another circulation in concentrate circuit.

Evaporated part of solution rises to the top of boiling chamber. From there the vapour is sucked out by a mechanical blower. The blower produces vacuum in the boiling chamber. It also compresses the vapours and heats them even more. Overheated vapour condeses in heat exchanger of circulation ciruit and releases heat to the circulated solution. Condensed vapour is called distillate. The distillate is held in the retention tank and then released out of the evaporator.

Evaporators AQUADEST-D are characterized by continuous operation. This means that the solution in the boiling chamber is kept at maximal desired concentration. Concentrate is continuously poured out of the evaporator. Fresh inlet solution is continuously poured into the boiling chamber.