三点注汽量对延迟焦化加热炉结焦影响分析

Effect of three-point steam injection quantity on coking degree in delayed coking furnace

对国内某炼油厂延迟焦化加热炉三点注汽量建立了模拟优化方法,取得了与现场数据较为吻合的炉管温度分布数据和三点注汽量优化结果,可以解释该炼油厂三点注汽系统优化问题。基于该模型方法,分析了三点注汽量对于炉管温升和炉管结焦的影响。在热负荷不变的情况下,三点注汽量会对炉管温升和结焦系数产生影响,提高注汽量将会降低出口温度,降低结焦系数,因此应在合适的范围内调节。第1,2点注汽主要影响出口温度和结焦系数,第3点注汽对出口温度影响不大,主要影响结焦系数。相较于注汽点1和注汽点3、注汽点2对炉管温升、结焦系数的调节更加敏感,在实际操作中应保证其数值的稳定。

A simulation optimization method was established for the three-point steam injection quantity of a delayed coking furnace in a domestic refinery. The temperature distribution data of the furnace tube and the optimization result of the three-point steam injection quantity were in good agreement with the field data, which could explain the optimization problem of the three-point steam injection system in the refinery. Through this model, the influence of steam injection quantity on temperature rise of furnace tube and coking coefficient were acquired. With heat load unchanged, increasing the steam injection quantity will reduce the outlet temperature and the coking coefficient. So that the quantity should be adjusted in an appropriate range. Steam injecting at point 1 and 2 mainly influence the outlet temperature and the coking coefficient. Steam injecting at point 3 mainly influence the coking coefficient. Compared with point 1 and 3, point 2 is more effective in controlling the temperature rise and coking coefficient. And its numerical stability should be mainly concerned in practical operation.