摘要
结合新疆某电厂2×300 MW机组尿素SNCR烟气脱硝工程设计实例,详细阐述了尿素SNCR烟气脱硝系统各主要单元的工艺流程及相关设备选型选材,介绍了喷枪布置依据及系统运行效果,并分析了氨水SNCR脱硝工艺和尿素SNCR脱硝工艺运行、投资费用。实践结果表明,尿素/NO_x摩尔比为0.5、原烟气NO_x质量浓度(标准状态)为178~187 mg/m^3时,脱硝效率可稳定在50%以上,逃逸氨质量浓度(标准状态)为1.2~1.9 mg/m^3,满足环保排放标准和设计要求。
Taking the design of urea SNCR flue gas denitrification project for 2×300 MW units in a power plant in Xinjiang as an example, this paper presents in details the workflow process of major component units and related equipment and material selection of the urea SNCR flue gas denitrifieation system. It also introduces the fundamental basis of spray gun layout design and the system operation effects. Finally the investment and operation costs of the ammonia SNCR denitrification technology as well as the urea SNCR denitrification technology are analyzed. The operation practice results show that when the urea/NOx mole ratio is 0.5, and the original flue gas NOx concentration ranges between 178-187 mg/m^3, the denitrifieation efficiency can be stabilized at more than 50% with the escape ammonia concentration of only 1.2×1.9 mg/m^3, meeting the environmental protection standard and design requirement with .the escape ammonia concentration only 1.2×1.9 mg/m^3.
出处
《中国电力》
CSCD
北大核心
2016年第4期6-11,共6页
Electric Power
关键词
尿素
SNCR
烟气脱硝
除盐水
喷枪
urea
SNCR
flue gas denitrifieation
desalted water
spray gun
