关键词:

生活垃圾；催化剂；高温再生；脱硝效率 ')">"> 生活垃圾；催化剂；高温再生；脱硝效率

Abstract:

To explore the effect of SCR catalysts offline high-temperature regeneration in municipal solid waste incineration, a certain municipal solid waste incineration of Everbright Environment in Tianjin was taken as the research object. Through testing the offline high-temperature regeneration process of SCR catalysts, the durations of each stage were recorded in each stage of heating up, holding and cooling down, as well as SO₂ concentration, which is helpful to provide an application reference for the operation of the offline high-temperature regeneration process. XRF tests were conducted on new and old catalysts before and after regeneration. The results showed that the main factors causing the deactivation of SCR low-temperature catalysts in municipal solid waste incineration were the contents of ammonium bisulfate (ABS) and ammonium sulfate (AS) in the flue gas. Through performance test and analysis, it was found that compared with before regeneration, the flue gas pressure drop of the catalysts is reduced by 300 Pa, and the relative activity recovered by 72% after catalyst regeneration. The offline regeneration process has achieved the expected effect. Taking 4×750 t/d municipal solid waste incineration as an example,  through cost analysis and comparison, it was found that 4.03 million RMB could be saved annually. The offline high-temperature regeneration process has high economic efficiency and high promotion value.

Key words: municipal solid waste')">

municipal solid waste, Catalyst, High-temperature regeneration, Denitration efficiency