利用三效助剂(TUD)降低催化裂化烟气污染物排放

摘要

分析了蓝色烟羽和硫酸铵盐产生的原因及应对措施,介绍了TUD三效助剂在中国石油化工股份有限公司镇海炼化分公司3.4 Mt/a催化裂化联合装置上的应用情况.结果表明:TUD三效助剂能有效降低锅炉出口烟气中的SO3,NOx和外排烟气中硫酸雾含量,锅炉出口烟气SO3和外排烟气硫酸雾的质量浓度分别从加剂前72.0～83.3,103.8 ～127.1mg/m3,下降到优化期的3.0 ～15.3,4.6 ～ 38.2 mg/m3.三效助剂加入后,烟气下沉现象基本消失,蓝色烟羽颜色明显变淡,而且助剂加入前后装置产品分布无明显变化,再生器稀密相温差变化不大,助剂助燃性能较好,对装置操作无不利影响.%The causes of blue smoke plume and ammonium sulfate and corresponding countermeasures are analyzed.The application of tri-functional additive TUD in the 3.4 MM TPY FCCU in SINOPEC Zhenhai Refining & Chemical Co.,Ltd.is introduced.The results demonstrate that,the TUD can effectively reduce the SO3,NOx content of boiler exit flue gas and sulfuric acid mist content of stack.The concentrations of SO3 in boiler flue gas and sulfuric acid mist are reduced from 72.0 ～ 83.3 mg/m3 and 103.8 ～ 127.1 mg/m3 to 3.0 ～ 15.3 mg/m3 and 4.6 ～ 38.2 mg/m3 respectively,and the smoke sinking has disappeared,and blue smoke plume has faded.The addition of the additive has no impact on the distribution of products of the unit,and there is little variation in the temperature in the dense bed of regenerator.The additive has a good promoting performance and has no negative impact on unit operation.