基于实测的燃煤电厂烟气协同控制技术对SO3去除效果的研究

摘要

选取国内10台典型燃煤电厂发电机组,对其主要烟气控制设备进出口SO3浓度进行实测.结果发现,选择性催化还原(SCR)反应器的主要功能是脱硝,而低低温电除尘器、湿法脱硫装置和湿式静电除尘器具有很好的脱硫效果.实测得到某典型发电机组负荷率分别为75％、100％的工况下,SO3综合脱除率可达89.67％、93.98％.因此,SCR反应器/低低温电除尘器/湿法脱硫装置/湿式静电除尘器联用是良好的脱硫脱硝烟气协同控制技术.%10 typical coal-fired power plant equipments were selected to monitor SO3 concentration of entrance and exit in each equipment.Results showed that the selective catalytic reduction (SCR) reactor unit had denitrification function,while low-low temperature electrostatic precipitator unit,wet flue gas desulfurization unit and wet electrical precipitator unit had desulfurization function.The comprehensive removal rate of a typical equipment reached 89.67％ and 93.98 ％ under load rate of 75 ％ and 100 ％,respectively.Therefore,SCR reactor/low-low temperature electrostatic precipitator/wet flue gas desulfurization/wet electrical precipitator was a good technology for co-benefit control of denitrification and desulfurization.