Comparing with industrial extraction machine and concentracting machine with single-effect allocation,the industrial extraction machine or extracting and concentrating unit with dual-effect allocation has the prominent advantages as follow; 1,it reserves the essence from the circulative and dynamic extraction and concentraction of the solvent: The twice steam or condensed water produced during the concentration will reflow to the extracting tank so that higher strength gradient is always maintained in the extracting tank,which accelerates the leaching speed and shortens the extracting times. 2,The twice steam from the first effect acts as the heat source of the second effect,and  the potential heat for condensing of twice steam can be fully used,which saves the steam and cooling water, saving about 40% energy consumption,Especially in the large production,it has high economic benefit and social  benefit. 3,The twice steam of the evaporator has passed through the secondary and tertiary condensation,which  can guarantee the alcohol comsumption during alcohol consumption during alcohol extraction and is environmentally protective. 4,As the technological flows allocated are different, the unit with dual-effect allocation has lower requirements to the height of the factory building. 5,The industrial extraction machine extracting and concentrating machine through dual-effect preparation can be used for water extraction and alcohol extraction,

         industrial scale ultrasonic vacuum concentration system for extracting Licorice