5000t/d水泥熟料生产线节能降碳升级改造实践

Upgrading and Transformation Practice of Energy-saving and Carbon Reduction for 5000t/d Cement Clinker Production Line

某5 000t/d水泥熟料生产线存在预热器换热效果差、C1旋风筒出口温度高、分解炉容积偏小、NO_(x)排放浓度高、冷却系统热回收效率低、熟料单位产品综合能耗指标较高等问题,是水泥行业碳达峰和碳减排技改试点项目。该项目提出了烧成系统节能降碳升级改造方案,并同步对生料粉磨系统及水泥粉磨系统进行了整体优化升级。通过采取分解炉扩容、应用低能耗自脱硝技术、将五级预热器升级为六级、扩大烟室缩口尺寸、更换三次风管、采用带中置辊式破碎机的行进式稳流冷却机并配套高效风机等技改措施,熟料单位产品综合煤耗低于国标1级能效指标,每年可节约标煤3.5×10^(4)t,减少CO_(2)排放7.7×10^(4)t,节约氨水用量0.3×10^(4)t,NO_x排放浓度<50mg/Nm^(3),节能降碳效果显著。

A certain 5000t/d cement clinker production line with problems such as poor heat exchange efficiency of preheater,high outlet temperature of C1 cyclone outlet,small calciner volume,high NO_(x) emission,low heat recovery efficiency of cooler,and high energy consumption per unit product of clinker.It is a pilot project for carbon peak and carbon reduction technology transformation in the cement industry.The project applies an energy-saving and carbon reducing upgrade plan for the pyro system,and simultaneously optimizes and upgrades the raw material grinding system and cement grinding system.By adopting technological transformation measures such as expanding the volume of calciner,applying low-energy self-denitrification technology,upgrading the 5-stage preheater to 6-stage,expanding the kiln chamber,replacing the tertiary air duct,and apply a grate cooler with intermediate roller crusher and high-efficiency fans.The fuel consumption per unit product of clinker is lower than the national standard level 1 energy efficiency index,saving 3.5×10^(4)t of standard coal per year,reducing CO_(2) emissions by 7.7×10^(4)t,saving 0.3×10^(4)t of ammonia water consumption,and NO_(X) emission concentration<50mg/Nm3,with significant energy-saving and carbon reduction effects.