Qingdao Ruipute plate evaporator is welded with a special corrugated pair of plates to produce high intensity turbulence, which greatly improves the heat transfer coefficient. The increase in heat transfer efficiency means a reduction in the required heat exchange area, which greatly saves investment costs, especially when special materials are required. The plate evaporator is compact and economical, so it replaces the conventional bulky and costly falling film equipment. The plate evaporator has a wide plate gap, a wide channel opening and laser welding that ensuring the vacuum low pressure evaporation process to be performed in both aqueous and organic systems.