柴油加氢装置反应系统压力波动分析及消除

ANALYSIS AND ELIMINATION OF PRESSURE FLUCTUATION IN THE REACTION SYSTEM OF DIESEL HYDROGENATION UNIT

某柴油加氢装置设计加工能力为0.80 Mt a,实际最大加工能力为0.90 Mt a。当加工量提高至95 t h以上时,加热炉进出口压力出现正弦式波动,加热炉出口管线出现规律性振动。通过对反应系统调节阀、注水泵、换热器跨线等部位进行调整,反应系统压力波动仍未消除。借助热成像发现加热炉出口管线内存在旋转流,在检修期间对加热炉出口管线配管进行优化。装置开工后,不仅反应系统压力波动消除,而且加工能力达到设计值,有效保证装置的经济性和安全性。

The designed processing capacity of a diesel hydrogenation unit was 0.8 Mt a,and the actual maximum processing capacity was 0.9 Mt a.When the processing capacity was over 95 t h,the pressure at the inlet and outlet of the heating furnace fluctuated in a sinusoidal manner,and the pipeline at the outlet of the heating furnace vibrated regularly.The pressure fluctuation of the reaction system had not been eliminated by adjusting control valve,water injection pump,and crossing line of the heat exchanger.With the help of thermal imaging,it was found that there was rotating flow in the outlet pipeline of the heating furnace.After the outlet pipeline of the heating furnace was optimized during the maintenance,not only the pressure fluctuation of the reaction system was eliminated,but also the processing capacity reached the design value,effectively ensuring the economy and safety of the unit.