含油污泥热解炉结焦数值仿真模拟研究  

Numerical Simulation of Coking in Oily Sludge Pyrolysis Furnace

作　　者：周大新 ZHOU Daxin(Daqing Oilfield Design Institute Co.,Ltd.)

机构地区：[1]大庆油田设计院有限公司,黑龙江163712

出　　处：《油气田地面工程》2023年第3期40-43,共4页Oil-Gas Field Surface Engineering

摘　　要：含油污泥热解工艺由于具有处理效果稳定可靠、无害化和资源化利用的特点,已经作为我国含油污泥处理的重要技术。但工艺中核心设备热解炉的结焦现象导致设备堵塞、导热系数降低等,直接影响含油污泥的处理效能。以大庆油田日处理规模为24t的某含油污泥处理站热解炉为例,通过对污泥热解炉内部结构的解析,采用计算流体力学(CFD)软件进行流体动力学数值仿真,分析热解炉筒体壁面温度和炉内速度分布对设备结焦的影响。研究表明,热解炉出口附近炉筒内侧和外侧均存在温度低于其他位置、会增加融化/气化组分二次凝结的风险;热解炉炉筒内部相对速度较小(0.01m/s),使局部油泥和炉筒内部壁面接触时间较长,会增加吸附结焦的风险。研究成果对排查热解炉结焦隐患及节能降耗具有重要意义。The pyrolysis process of oily sludge has been regarded as an important technical method for oily sludge treatment in China because of its stable and reliable treatment effect,harmless and resource utilization.As the core equipment in the process,the coking phenomenon of the pyrolysis furnace leads to equipment blockage and the decrease of thermal conductivity,which directly affects the treatment efficiency of oily sludge.Taking the pyrolysis furnace of an oily sludge treatment station with a daily processing capacity of 24 tons in Daqing Oilfield as an example,this paper analyzes the internal structure of the sludge pyrolysis furnace,uses CFD software to carry out numerical simulation of fluid dynamics,and analyzes the influence of the wall temperature of the pyrolysis furnace and the velocity distribution in the furnace on the coking of the equipment.The results show that the temperature inside and outside the furnace barrel near the outlet of the pyrolysis furnace is lower than other positions,which will increase the risk of secondary condensation of melted/vaporized components.The relative velocity inside the pyrolysis furnace barrel is relatively low(0.01 m/s),which makes the local oily sludge contact with the inner wall of the furnace barrel for a long time,leading to increase the risk of adsorption coking.The research results are of great significance for troubleshooting the coking hidden danger of the pyrolysis furnace and saving energy and reducing consumption.

关 键 词：热解炉 含油污泥 结焦 数值仿真 温度 速度 

分 类 号：X74[环境科学与工程—环境工程]