燃煤火电机组SO2超低排放改造方案研究

国家对环保要求日趋严格，部分大气污染防治重点控制区域省份及部分发电集团已启动火电厂烟气超低排放技术改造试点，要求主要污染物排放指标达到GB13223—2011《火电厂大气污染物排放标准》天然气燃气轮机组排放限值，其中SO2（标准状态）为35 mg/m3。根据目前脱硫技术发展现状，通过对燃煤火电机组石灰石-石膏湿法烟气脱硫装置SO2超低排放改造案例的分析研究，给出了不同方案的成功应用结果，对燃用不同硫分的燃煤机组提出了原则性的SO2超低排放改造方案和建议。

Study on Modification of Ultra-Low SO2 Emission in Coal-Fired Power Plants

The government is being more strict on environment protection and in some of the primary air pollution prevention and control areas, the local government and the power generation groups have already launched pilot projects of flue gas ultra-low emission to meet the emission requirements by Emission Standard of Air Pollutants for Thermal Power Plants(GB13223-2011), of which the SO2 emission limit is 35 mg/m3 in the standard state. Based on the current development of desulphurization technologies and the case analysis and studies on the modification schemes of ultra-low SO2 emission from coal-fired units adopting wet limestone/gypsum FGD, the successful applications of different scenarios are presented，and the modification proposals for units using coals of different sulphur contents are suggested.