管式裂解炉2种稀释比调节方法的正交数值模拟

 用自建的管式裂解炉二维工艺数学模型对2种不同稀释比调节方法进行了模拟计算，并用正交实验设计法对模拟计算结果进行了处理和分析。结果表明，用目前工业上所采用的稀释比调节方法改变稀释比时，稀释比对乙烯收率的影响在显著性0.01下是非常有限的，而任意2因素的交互作用项的影响比误差项要大，且乙烯收率随着稀释比的增加逐渐减小。采用笔者设计的新稀释比调节方法，在裂解温度为1113K~1133K、停留时间为270~330kg/h和稀释比在0.45~0.65范围内变化时，温度、停留时间和稀释比的F_Ration值分别为1700、350和293。裂解温度是最主要的影响因素，其次为停留时间和稀释比，其它因素的影响规律与文献报道一致。

SIMULATION OF TWO METHODS FOR REGULATING THE DILUTION RATIO IN THE TUBULAR CRACKING FURNACE WITH THE ORTHOGONAL DESIGN METHOD

Abstract: Two regulating methods used for adjusting the dilution ratio in tubular cracking furnace were simulated by self-built two-dimensional mathematical model and the simulation was processed and analyzed by orthogonal design. The results showed that when the regulating method adopted by the current industry was used to adjust the dilution ratio, although the impact of dilution ratio on ethylene yield was limited under the level of 0.01， the impact of the interaction of any two factors was greater than that of errors，and ethylene yield was gradually decreased with the increase of dilution ratio. While the regulating method designed by authors was used to adjust the dilution ratio, the FRation value of temperature, residence time and dilution ratio was 1700, 350, 293, respectively, at the pyrolysis temperature from 1113K to 1133K and the residence time varying within 270-330kg/h and dilution ratio varying in the range of 0.45-0.65. Among the factors influencing ethylene yields, temperature was the domain one, residence time and dilution ratio were the next ones, which was consistent with the reported literature.