The project is within the field of chemical separation technology. It developed the international advanced level of combined trapezoid spray trays (CTST), dividing wall column (DWC) technology, heat-integrated distillation column (HIDIC) key technology and equipment, and a number of Energy-saving and consumption reducing new technology ,aiming at the bottleneck problem of separating towers’high flux, high efficiency and the urgent demand of energy conservation, consumption reduction and emission reduction.