火力发电厂锅炉烟气脱硝催化剂性能评估

Boiler Flue Gas Denitrification Catalyst Performance Evaluation of Thermal Power Plant

NOx是大气环境的主要污染物之一,其主要来源为火力发电机组。依靠低氮燃烧技术,远达不到排放要求。选择性催化还原脱硝(简称SCR)技术是目前效率最高、最成熟、应用最广泛的电厂烟气脱硝技术。催化剂是SCR技术的核心部分,决定了SCR系统的脱硝效率和经济性,催化剂建设成本占烟气脱硝工程成本的20%以上,运行成本的30%以上。钒钛系废弃脱硝催化剂,已归类为危险废物。延长催化剂使用年限,可大幅度降低运行费用。因此,做好催化剂管理、维护及性能评估十分重要。

NOx is one of the main pollutants in the atmospheric environment,which is mainly from the thermal power generating units. Relying on low nitrogen combustion technology can not meet the emission requirements. Selective catalytic reduction （SCR） technology for the power plant flue gas denitrification is currently the most widely used, high efficient and mature technology. Catalyst is the core part of SCR technology which determines the denitration ef- ficiency and economy of the SCR system. The catalyst costs accounted for 20% of the denitration project and 30% of the operation cost. Vanadium titanium as an abandoned denitration catalyst has been classified as a hazardous waste. Prolonging the catalyst life can greatly reduce the operating cost. Therefore, it is very important to conduct manage- ment,maintenance and performance evaluation of catalyst.