RDNOx助剂技术在再生烟气NO_x达标排放中的应用

为实现烟气NO_x达标排放,在中国石化安庆分公司DCC装置无烟气脱硝后处理设施上进行了RDNOx助剂工业应用试验。结果表明,在助剂占系统藏量约2.5%(w)、按进料计剂耗0.03kg/t加注时,可在烟气过剩氧含量不受严格限制的情况下,将烟气中NO_x质量浓度稳定控制在小于70mg/m^3(在线仪表),达到国家最新环保标准(特别限值)要求。逐步调整助剂加注量至0.015kg/t、约占新鲜催化剂补充量的1.5%时,NO_x浓度依然保持稳定达标。相对加注脱硝助剂前的NO_x质量浓度空白值400～500mg/m^3,NO_x浓度降幅达到80%以上。在RDNOx助剂应用过程中,产品分布和主要产品性质基本不变。

APPLICATION OF RDNOx ADDITIVE TO MEET EMISSION REGULATIONS OF NOx IN FLUE GAS

The DCC unit in SINOPEC Anqing Company is lack of NOx reduction equipment. To meet the requirement of NOx emission regulations，a commercial trail of RDNOx additive was conducted. The results showed that, when additive was accumulated to about 2.5% of catalyst inventory and added by 0.03 kg/t (based on fresh feed) without strict controlling of excess O2, NOx in flue gas could be decreased to 70 mg/m3, which meets the requirements of the latest national regulations. Nowadays, the addition of RDNOx is adjusted to 0.015 kg/t (about 1.5% of fresh catalyst); NOx in flue gas is still lower than the limitation. Compared with the 400~500 mg/m3 NOx emissions before adding the additive, NOx is decreased by over 80%. In addition, the application of RDNOx additive has little influence on product distribution and properties.