首套南疆渣油加氢装置长周期运行难点及对策

摘要

The VRDS unit is the first unit for processing southern Xinjiang oil. Due to high asphaltene content in southern Xinjiang oil, the conversion rate is low, low temperature part of the main fractionator system is prone to asphaltene precipitation fouling, refined oil pipeline pressure drop increases, resulting in the device to run under low load, heat transfer effect of heat exchanger of refined oil and crude oil decreases after fouling of heat exchanger, entrance temperature of reaction heating furnace decreases, which can increase the reaction furnace load and can directly affect long period operation of the unit. So various measures have been taken, the operation cycle of the residue hydrotreating unit has been extended.%该套渣油加氢装置为首套加工南疆油的渣油加氢装置,由于南疆油中难溶沥青质含量较高,其转化率较低,装置分馏系统低温部位易出现沥青质析出积垢,精制渣油外输压降增大,导致该装置被迫降负荷生产,换热器结垢后精制渣油与原料油换热器换热效果下降,反应加热炉入口温度下降,增加了反应加热炉的负荷,直接影响装置长周期运行,通过各种措施的有效实施,装置运行周期得到延长.