摘要
垃圾焚烧技术由于其自身特点,有望成为未来中国城市垃圾处置的主要方式。而焚烧烟气中NO_x污染的控制是垃圾焚烧技术得以广泛应用的重要前提。目前处理NO_x的主流方法为SNCR和低温SCR。SNCR将还原剂直接喷入炉膛内,易操作,但脱硝效率较低。低温SCR采用低温低尘布置,能耗小,但硫酸氢铵的生成制约了低温催化剂的广泛应用。需进一步研发低温具有良好抗硫性能的催化剂,并在工程应用中优化反应器和脱硫工艺的设计,以减少NH_4HSO_4的生成,增加催化剂在线加热装置,从而延长催化剂的寿命。
Incineration,because of its unique characteristics,will become one of the main disposal methods of MSW in the future in China. While the treatment of NOxis an important prerequisite for the popularization of the technology of waste incineration. SNCR and low temperature SCR are the mainstream disposal technology of NOxat present. SNCR injects the reducing agent into the furnace,is easy to operate,but its efficiency is comparatively lower. Low temperature,low dust,and low energy consumption are the advantages of low-temperature SCR,but the formation of ammonium sulfate affected the application of low temperature SCR catalyst. Further research and development of catalyst with better performance at low temperature are needed. In the project,the design of optimizing reactor and desulfurization process was adopted,the production of ammonium sulfate was reduced,and on-line catalyst heating device should be added to prolong the service life of the catalyst.
出处
《环境工程》
CAS
CSCD
北大核心
2017年第2期64-67,88,共5页
Environmental Engineering