空气预热温度对立式圆筒加热炉效率与NO_x排放规律的影响  

Effect of Preheated Air Temperature to Efficiency of Vertical Cylindrical Heater and Rule of NO_x Discharge

作　　者：张永学[1] 侯虎灿[1] 师志成[1] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249

出　　处：《化工设备与管道》2012年第4期16-20,共5页Process Equipment & Piping

基　　金：国家自然科学基金青年基金(编号:50809075);重点交叉学科"低碳能源工程"项目资助

摘　　要：炉膛内温度是炼厂加热炉最重要的工艺指标之一。用计算燃烧学的方法对某石化公司F101立式圆筒加热炉内的温度场进行了计算,实际工况温度计算结果与现场测试结果吻合良好,证明计算所选模型是可靠的。综合分析各工况热流场的计算结果表明,当空气预热温度小于500 K时,炉膛内平均温度随着空气预热温度的增加而升高;当空气预热温度大于500 K时,炉膛内平均温度趋于稳定,炉膛内温度分布更为均匀;当预热温度为468 K时,加热炉热效率为90.6%,烟气中NOx生成量为285 mg/m3,低于国家标准。综合考虑,该加热炉选择的理想空气预热温度为468 K。The temperature in furnace is one of the most important process indexes. In this paper, by using computational combustion method, the simulation of temperature distribution in F101 vertical cylindrical tube furnace in Harbin Petrochemical Company was carried out. The result is identical to that from measured in practical conditions, which proved the calculation model is reliable. From the results of comprehensive analysis of heat fields under different conditions, it was indicted that when preheat air temperature is less than 500 K, the average temperature in furnace will increase with the increase of preheat air temperature; when preheat air temperature is larger than 500 K, the average temperature in furnace will tend toward stable and the temperature in furnace will more evenly distribute. When preheat air temperature is 468 K, the efficiency of heater can reach 90.6%, and NOx volume is 285 mg/m3 which is less than that stipulated in national standard. With comprehensive consideration, ideal preheat air temperature for this furnace is selected as 468 K.

关 键 词：立式圆筒加热炉 计算燃烧学 预热空气温度 NOx 温度场 

分 类 号：TQ054[化学工程]