关键词: 低凝柴油, 加氢分馏塔, 馏程切割, 侧线, 汽提塔

Abstract: The 1.4 Mt/a gasoline and diesel mixed hydrogenation unit at SINOPEC Tahe Refining and Chemical Co. Ltd. is located in Xinjiang. In winter, the -35# low pour point diesel was produced mainly by mixing a certain proportion of aviation kerosene and pour point depressant components into the -10# low pour point diesel, which not only wastes the aviation kerosene resources, but also may cause wax crystallization and precipitation during the storage and transportation, thus affecting the use of diesel products. Based on the research, the existing No.2 hydrogenation fractionator is planned to be revamped to directly produce -35# low pour point diesel by side line, i.e., a share of diesel components is to be extracted from the hydrogenation fractionator and sent to the newly installed low pour point diesel stripper based on the distillation range cutting experimental data, the gas phase at the top of the stripper will return to the fractionator, low pour point diesel conforming to the -35# National V automobile diesel indicators can be produced from the bottom of the stripper, and the diesel from the bottom of the fractionator can be sold as the blending component for -10# National V automobile diesel.

Key words: low pour point diesel oil, hydrogenation fractionator, distillation range cutting, side, stripper