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三、减压蒸馏的主要设备1.减压炉润滑油型减压炉的主要功能是为减压蒸馏提供足够的热量,但要严格避免油品在炉管内裂解。为此,应从以下几方面注意:(1)炉型我国减压炉除少数老式双斜顶炉外,大多是圆筒立管炉。这种炉的炉管受热不均匀系数高达2.06,管内容易出现局部过热,造成油品分解、结焦。国外不少炼油厂的减压炉采用卧管立式炉,可减少过
Third, the main equipment of vacuum distillation 1. The main function of decompression furnace oil-based vacuum furnace is to provide enough heat for vacuum distillation, but to strictly avoid cracking of oil in the furnace tube. To this end, should pay attention to the following aspects: (1) Furnace In addition to a few of our old vacuum furnace decompression furnace double bevel top furnace, mostly cylindrical riser furnace. This furnace tube heating uneven coefficient of up to 2.06, the tube prone to local overheating, resulting in oil decomposition, coking. Abroad, many refineries vacuum furnace using vertical tube furnace can be reduced