摘要
以 SL-Ⅱ型乙烯裂解炉反应管为对象,结合烯烃厂裂解工艺参数,对管内石脑油裂解反应过程进行了模拟研究。裂解反应模型采用 Kumar 提出的分子反应模型,模拟得到了管内油气流速、温度、裂解产物的变化规律。结果表明,近壁层流层的存在使得管内油气径向速度、温度梯度较大,二维管内模型可以更全面地描述裂解反应过程。模拟得到的裂解产物收率与裂解炉的生产运行数据进行了比较,两者基本一致,验证了裂解反应模型的合理性。
Based on the operating conditions of olefin plant, numerical simulation was carried out for naphtha pyrolysis reaction in the reactor tubes of SL-Ⅱ ethylene cracking furnace, adopting the molecular reaction model presented by Kumar. Temperature distribution of tubeskin, temperature distribution of pyrolysis material and yields of products were obtained and compared with those of olefin plant. The results showed that gradients of radial velocity and temperature were larger due to viscous sublayer near the wall of reactor tube. Cracking reaction process could be fully described by two-dimensional model. Yields of pyrolysis products were agreement with testing results which verified the reliability of pyrolysis reaction model.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
2006年第3期265-270,共6页
Chemical Reaction Engineering and Technology
关键词
乙烯裂解炉
石脑油
裂解反应
数值模拟
ethylene cracking furnace
naphtha
pyrolysis
numerical simulation
