基于数值模拟的新型重整炉开发

DEVELOPMENT OF NEW-TYPE REFORMING FURNACE BASED ON NUMERICAL SIMULATION

利用数值模拟方法研究了传统重整加热炉和新型重整加热炉辐射室内的流动、燃烧和传热过程。通过模拟计算,得到了两炉型重整炉辐射室内的流场、温度场以及炉管表面热强度分布的详细信息,模拟结果表明:辐射室中心采用气墙并在气墙两侧均布燃烧器的双面辐射炉型,使辐射室内同一高度截面上的流场均匀性得到改善,有利于炉管圆周方向的均匀受热,并可防止炉管由于圆周方向受热不均而变形;同时,新型重整加热炉下一步优化方向应尝试改变燃烧器类型,进一步解决沿炉管长度方向上的烟气温度和炉管表面热强度的分布不均问题。

Numerical simulation is applied to study the fluid flow,combustion and heat transfer in the radiation chamber of the conventional reforming furnace and the new-type reforming furnace.Through simulation calculation,this paper obtains the detailed information about the flow field,temperature field and hot strength distribution of furnace tube surface in the radiation chamber of these two types of reforming furnaces.The simulation results show that it can improve the flow field uniformity on the same height section of the radiation chamber to adopt the doublesided radiant furnace with gas wall and set burners on both sides of the gas wall in the center of the radiation chamber,which is beneficial to the uniform distribution of tube heat flux in the circumferential direction and prevents furnace tube deformation caused by uneven heating in such direction.Meanwhile,the next optimization direction of heating furnace shall be focused on the attempt to change the burner types to further resolve the uneven distribution of flue gas temperature along the longitudinal direction of the furnace tube and hot strength on the surface of the furnace tube.