【作者】 胡巍；

【导师】 孙保民； 唐建成；

【作者基本信息】 华北电力大学（北京） ， 动力工程， 2008， 硕士

【摘要】 燃煤电厂污染物NO_X的排放日益严重地影响着环境、气候和人类的健康,解决电站锅炉NO_X排放对环境的影响,已成为一个重要问题。本论文系统阐述了已有氮氧化物的控制技术,并对其技术经济特性进行了相应地分析,进而针对北京国华热电厂锅炉的脱氮改造方案进行了一系列的研究。该厂首先通过主燃区低NOx燃烧器燃料再燃、低氧分级燃烧的燃烧手段控制炉膛燃烧生成的NO_x浓度小于350 mg/m~3,继而在炉膛上部区域喷入一定量的尿素溶液溶液还原NO,进一步降低锅炉NO_x排放浓度至200 mg/m~3,在此基础上提出了SCR烟气脱硝技术改造方案,分析了SCR催化剂、SCR安装位置、投资运行成本及锅炉热力计算等方面因素对NOX排放的影响规律,研究结果表明方案实施后能达到降低NO_X排放的要求。更多还原

【Abstract】 Pollutant NOX emission is an increasing threat to environment and human health, so solving the environment pollution problem of NO_X emission from power plant boiler has became an urgent problem. A systematic description is given of existing NO_X control technology and its technology and economic characteristics in this paper. On this basis, this text has made a series of research aiming at the nitrogen removal of boiler in Guohua Thermal Power Plant, Beijing. First, the NO_X emission is reduced to about 350mg/Nm~3 through Fuel Reburning and Air Staged Combustion of Low-NO_x Burners, and then by the technology of SNCR, the NO_X emission is reduced to about 200mg/Nm~3, next it proposed the innovation scheme of SCR DeNO_X technology, analyzing the influence regulation of such factors as SCR catalyst, installation position, investment operating cost and thermal calculation of boiler on NO_X emission. The results show that the innovation scheme can reach the standard of NO_X emission.更多还原