摘要
在一台循环流化床实验台上，研究了石灰石脱硫过程中Ｎ_２Ｏ／ＳＯ_ｘ／ＮＯ_ｘ浓度的变化，并在空床上进行了再燃烧法脱除Ｎ２Ｏ的实验，结果表明，石灰石脱硫会使ＮＯｘ少量增加，再燃烧法可以在不增加ＮＯｘ的同时使Ｎ_２Ｏ大大降低；再燃燃料的挥发分含量越高，Ｎ２Ｏ的消减率越高；气体停留时间越长，Ｎ２Ｏ的分解率越高；
The variation of N 2O/SO x /NO x concentration during desulphurization by limestone was investigated on a bench scale circulating fluidized bed combustor. An experiment on N 2O reduction with the afterburning method was also carried out in an empty bed. The results show that desulfurization with limestone led to a little increase of NO x . Afterburning could greatly reduce N 2O emission without increasing NO x . The higher the volatile matter content of the afterburning fuel is and the longer the residence time of the flue gas is, the higher the N 2O reduction will be. It is recommendable to use as much as possible coal of low nitrogen content and of smaller particle diameter, easy to ignite and burn up as is the afterburning fuel. It has been found that oxygen has a significant influence on N 2O reduction with the afterburning method. It is advisable to adopt combustion in the lowest possible amount of oxygen.
出处
《华中理工大学学报》
CSCD
北大核心
1996年第11期103-106,共4页
Journal of Huazhong University of Science and Technology
基金
国家自然科学基金
清华大学煤的高效低污染燃烧国家重点实验室开放基金
