火电厂SCR脱硝催化剂寿命预估研究

Study on Life Prediction of SCR Denitrification Catalyst in Thermal Power Plants

火电厂SCR烟气脱硝装置的核心是SCR脱硝催化剂,其使用寿命直接影响着SCR工艺的效率和运行费用。针对火电厂SCR脱硝催化剂在运行过程中的失活机理,建立了催化剂的失活动力学模型以及寿命计算方法,并基于物理和数学方法对失活动力学模型进行了修正,采用催化剂实际运行的失活数据进行验证,确定了催化剂失活动力学的最佳修正模型为k=φk0e-At,利用该模型对催化剂进行寿命估算具有较为准确的结果,可为火电厂SCR脱硝催化剂的寿命管理提供一定的参考依据。

SCR denitrification catalyst is the key component of the denitrification equipment in thermal power plants.Its working life directly influences the efficiency of flue gas denitrification and operation costs. Based on the deactivation mechanism of the SCR catalyst in the operation process,the deactivation kinetics model and the life calculation method are established. The deactivation kinetics model is further modified based on physical and mathematical methods. By verifying the typical experimental data of the catalyst deactivation in the actual operation,the optimal modified model for catalyst deactivation is determined to be k = φk0e- At. The newly modified model is able to give accurate results of life prediction of the SCR catalyst,which can provide basic reference for the life management of the SCR catalyst in the thermal power plants.