... we have achieved four patents:1). Calandria multi-effect distiller with internal heating and circulation, patent NO: 95243492X2). Double ... exchanger, patent NO: 98226059.23). Oil heating multi-effect distiller, patent NO: 022665144). Bidirectional centrifugal separator, patent NO: ... material, parts and equipment. III.LD3000/6 water distiller main technical tarts The machine uses de-ionized water ...