摘要
利用安大略法对国内某300 MW机组的燃煤用不同氯含量煤种时,不同氨氮比条件下,选择性催化还原(selectivecatalytic reduction,SCR)装置前后烟气汞形态进行测试分析,结合SCR脱硝装置技术原理,分析了SCR脱硝装置对汞的协同控制作用及煤中氯元素含量、氨氮比对其协同控制效果的影响。研究表明,SCR脱硝装置对烟气中总汞的减排效果不显著,且SCR前后颗粒态汞的浓度变化不大,但烟气经过SCR脱硝装置后,烟气汞的形态会发生改变,煤中氯元素的含量对烟气经过SCR脱硝装置汞形态的转变程度有较大影响;喷氨后,烟气中的氨气对形态汞转化有抑制作用。
The paper analyzed the cooperative control impact of selective catalytic reduction （SCR） denitration device on mercury and chlorine content in coals as well as the impacts of ammonia nitrogen ratios on mercury. Based on the SCR denitration device＇s technical principle, taking a 300MW unit as an example, when the unit fueling different coals with different Chlorine contents and under the condition of different ammonia nitrogen ratios, the mercury morphology distribution before and after going through SCR was analyzed by using the Ontario Hydro method. The research shows that the effects of SCR on emission reduction of mercury in flue gas are woak and the changes in the concentration of particulate mercury are small before or after SCR. However, the morphology of mercury changes after the flue gas goes through SCR, and the degree of the change is greatly affected by the chlorine contents in coals. After the injection of element ammonia in flue gas, ammonia shows depressive impact on the mercury conversion.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第14期32-37,12,共6页
Proceedings of the CSEE
基金
国家环保公益性行业科研专项项目(200909025)~~
关键词
选择性催化还原
汞
协同控制
氯元素
氨氮比
selective catalytic reduction （SCR）
mercury
cooperative control
chlorine content
ammonia nitrogen ratios
作者简介
王铮（1990），男，硕士研究生，研究方向为燃煤电厂污染物减排及监测技术，本文通讯作者，jesse900109@126．com；
薛建明（1964），男，教授级高工，长期从事火电厂污染物减排技术的研究、开发和工程应用，xjm_gdhb@126．com。
