Abstract:Selective catalytic reduction technology(SCR) denitration technology is commonly used in power plants in China.The flue gas temperature is strictly required in operation.How to control the inlet smoke temperature of SCR is an important subject to improve the denitration efficiency of SCR at present.In view of the current situation,the key factors affecting the denitration efficiency of SCR and the common wide load denitration technical reform were analyzed.With the wide load denitration technical reform,the smoke temperature at the entrance of SCR was significantly improved,and the denitration efficiency was improved and the ammonia escape rate was reduced,which provides practical reference for the development of denitration technology in the power industry.