摘要
本研究利用Fluent软件耦合详细反应机理的方法建立了某660 MW燃煤机组三维SCR反应器模型。通过模型研究了不同喷氨方式以及催化剂比表面积对脱硝反应的影响,结果表明:对于刚投运的催化剂,脱硝反应主要在第一层催化剂内完成,第二层催化剂主要起到吸收氨逃逸的作用,30区喷氨与10区喷氨获得的脱硝效果相同。当投运一段时间后,首层催化剂发生堵塞磨损等问题,导致脱硝效率降低,出口氨逃逸增大,此时30区喷氨效果略优于10区喷氨。
A three-dimensional SCR reactor model of 660 MW coal fired unit was established by using Fluent coupled detailed reaction kinetics. The effects of different ammonia injection methods and the specific surface area of catalyst on the De-NOxreaction were studied by the model. The results show that when the catalyst is newly put into operation,DeNOxreaction is mainly accomplished in the first layer catalyst,while the second layer catalyst mainly plays a role in the absorption of ammonia. The De-NOxeffectiveness is the same for both 30 and 10 area ammonia injection method. After the catalyst is operated for a period of time,the De-NOxefficiency is reduced and the escape of ammonia is increased as the first catalyst suffers from clogging and wear. At this point,the De-NOxeffectiveness of the 30 area ammonia injection method is slightly better than that of 10 area ammonia injection method.
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第8期81-86,125-126,共6页
Journal of Engineering for Thermal Energy and Power
关键词
选择性催化还原
详细反应机理
比表面积
喷氨方式
selective catalytic reduction
detailed reaction kinetics
specific surface area
ammonia injection method
