Method for estimating activity of catalyst in denitration device of coal-fired boiler

• Main Authors: Luo Huayi, Huang Xiaoying, Shi Weijing, Hu Ting, Wang Bohui, Wang Hongyuan, Ding Chenggang, Lu Jing, Yuan Jingqi, Lu Liangliang, Wang Jingcheng, Guo Shiyi
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; SEPARATION; TRANSPORTING

The invention provides a method for estimating activity of a catalyst in a denitration device of a coal-fired boiler. The method is characterized in that in the activity estimation process, the online operation parameters and data of a data collecting system are utilized, the catalyst periodic test data and the denitration process and structure parameters are combined, a chemical reaction model in the denitration process is used for estimating the denitration efficiency, and the activity of the denitration catalyst is estimated according to the denitration efficiency; if the activity of the catalyst is in the activity deactivating area (about 50%), a catalyst replacement plan is considered; for the catalyst replacement plan, the local catalyst activity condition is obtained according to the nitrogen oxide concentration distribution estimation, ammonia spraying accumulation computing, design parameters of a denitration system, and equivalent methods, and a to-be-replaced area is determined. A local replacement