研究了以煤焦油来源的粗吡啶为原料精制获得吡啶系列产品的节能型工艺技术。预分馏塔轻、重组分进行馏程分割采出，以避免三甲基吡啶等重组分长流程高温加热；利用热耦合技术，总加热热负荷可节省38.4%，总冷凝热负荷可降低32.3%，同时预分馏塔塔顶冷凝器产生1 813.5 kW热量的低压蒸汽，且可省去甲基吡啶塔、二甲基吡啶塔和苯胺塔塔顶冷凝器等设备。运用Aspen Plus软件模拟计算并设计精制吡啶系列产品工艺流程，提出各个精馏塔的操作参数，最终获得高纯度吡啶系列产品。

The energy-saving technologies are studied for producing pyridine series products by refining crude pyridine materials that come from coal tar.Light and heavy components are respectively extracted from the pre-fractionator so that several heavy components,such as trimethylpyridine,will not be heated in a long high-temperature flow path.By undertaking the heat integrated technology,the total heat load of the reboilers can be saved by 38.4% and the total heat load of the condensers can be reduced by 32.3%.In the meanwhile,the condenser at the top of the pre-fractionator can generate low-pressure steam with 1 813.5 kw of heat capacity.Furthermore,the condensers at methyl pyridine tower,dimethyl pyridine tower and aniline tower can be cancelled.Aspen Plus software is utilized to simulate and design the purification process for refining pyridine series products.The operating parameters for each distillation column are provided from the simulation,and the final pyridine series products with qualified purity are obtained.