关键词: 柴油, 加氢降凝, 级配技术, 节能降耗

Abstract: According to the composition of diesel distillates and hydrocarbon reaction characteristics，combining the principle of heat release from hydrogenation reaction and heat absorption of hydrodewaxing reaction, by optimizing the grading combination of hydrotreating catalyst and hydrodewaxing catalyst, SINOPEC Dalian Research Institute of Petroleum and Petrochemicals has developed a high-efficiency diesel distillates hydrodewaxing technology. The results of industrial application in a 0.6 Mt/a hydrodewaxing unit showed that the temperature distribution of the catalyst bed in the hydrodewaxing reactor is reasonable and the inlet temperature is reduced by 25 ℃. Compared with the conventional hydrodewaxing technology used in the last cycle, the yield and cetane number of the main product No.－35 low condensation point diesel were increased. The hydrogen consumption and energy consumption of the unit were reduced by more than 10%，which could meet the energy saving and consumption reduction goal of the refinery, and the economic benefits of the unit was greatly improved.

Key words: diesel, hydrodewaxing, grading technology, energy saving and consumption reduction