论文部分内容阅读
洛阳石化1400kt/a延迟焦化装置加热炉采用一炉两塔流程,于2008年6月投产,计算热负荷为45.41MW,加热炉为两室四管程双面辐射箱式结构,加热介质为减压渣油。为降低装置能耗,于2011年9月对加热炉进行改造。改造内容包括更换燃烧器、改造空气预热器、采用先进控制、改造炉墙和增加仪表监测。改造后,利用FLUENT软件,对燃烧室中燃料气的燃烧特性和新型燃烧器某截面的温度场进行数值模拟,分析得出,新型燃烧器大幅降低了燃烧过程中氮氧化物的生成,保证了燃料气在低过剩空气系数下的充分燃烧;计算表明,空气预热器的改造提高加热炉热效率0.92%。先进控制技术的应用,减轻了劳动强度,提高了调节精度和加热炉运行的平稳率,达到了提高加热炉热效率的目的。综合改造后,加热炉热效率高达93.45%,与改造前相比,热效率提高1.81%。
Luoyang Petrochemical 1400kt / a delayed coking unit furnace using a two-furnace process flow, put into operation in June 2008, calculate the thermal load of 45.41MW, heating furnace for the two-chamber four-tube two-sided radiation box structure, heating medium minus Residue oil. In order to reduce the energy consumption of the unit, the heating furnace was retrofitted in September 2011. Retrofits include replacing burners, revamping air preheaters, using advanced controls, retrofitting furnace walls and increasing instrumentation. After the transformation, using FLUENT software to simulate the combustion characteristics of the fuel gas in the combustion chamber and the temperature field of a section of the new burner, it is found that the new type of burner greatly reduces the generation of nitrogen oxides in the combustion process and ensures The fuel gas is fully burned at low excess air coefficient. The calculation shows that the air preheater is improved to improve the thermal efficiency of the furnace by 0.92%. The application of advanced control technology has reduced the labor intensity, improved the adjustment precision and the smooth operation rate of the heating furnace, and achieved the goal of improving the thermal efficiency of the heating furnace. After the comprehensive transformation, the heating furnace thermal efficiency as high as 93.45%, compared with before the transformation, the thermal efficiency increased by 1.81%.