WATER DESALINATION METHODS AND FACILITIES USING MECHANICAL VAPOUR COMPRESSION DISTILLATION

摘要

The invention implements several innovations relative to MVC water distillation methods and facilities in order to decrease the specific electricity consumption to values of only 2 to 4 kWh/m3 of distillate produced, as well as the manufacturing costs. The vapour transport system is reduced to its simplest expression and has a practically null total dynamic pressure loss. The compression system is completely integrated into the evaporator-condenser, installed in the inlet of the condensation zones, provided with a vapour desuperheating system, and driven at a high speed of rotation. The auxiliary equipment is installed in the enclosure under a partial vacuum. The evaporator-condenser offers a degree of openness on the condensation chambers of more than 95% and the condensation chambers have a section that decreases with the path of the vapour. The exchangers on the incoming and outgoing flows are supplied with continuously balanced heat loads. Heat losses are offset by auxiliary heating. The unit can be made using a modular concept.