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| 燃煤电厂石膏雨污染排放实测 |
| Measurement of Gypsum Rain Emissions from Coal fired Thermal Power Plants |
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| DOI： |
| 中文关键词: 石膏雨 可凝结颗粒物 燃煤电厂 |
| 英文关键词: Gypsum rain Condensable particulate matter Coal fired thermal power plants |
| 基金项目:上海市环保局基金资助项目（沪环科2015-42号） |
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| 中文摘要: |
| 对上海市8台燃煤机组开展了石膏雨和相关污染物排放监测，考察部分燃煤电厂石膏雨排放对周边居民生活和电厂生产造成的影响。结果表明，采用GGH并加热到一定温度，同时对除雾器进行优化的机组烟尘和可凝结颗粒物浓度均较低，石膏雨沉降和液滴均未检出，无冷凝回流液；虽然装有湿式电除尘器和GGH的机组石膏雨沉降未检出，但液滴浓度较高；仅装有湿式电除尘器的2台机组中1台检出石膏雨沉降；对照机组石膏雨沉降和液滴浓度均较高。建议电厂提升排烟温度，同时采取措施消除烟气中石膏夹带，彻底消除石膏雨，在标准制定时应充分考虑目前燃煤电厂多种污染物排放情况及其对环境的影响，尤其是石膏雨和可凝结颗粒物，制定相应的监测方法和评价体系，将其纳入火电厂排放标准中。 |
| 英文摘要: |
| Emissions of gypsum rain and other related pollutants in 8 coal fired units were monitored in order to clarify gypsum rain pollution. Results showed that the unit with GGH which was heated to a certain temperature and taking demister optimization measures, the dust and condensable particulate matter(CPM) emissions were low. Gypsum rain precipitation, liquid drop and condensate reflux liquid were undetected. Though gypsum rain precipitation was undetected in unit with wet electrostatic precipitator and GGH, liquid drop concentration were high. Gypsum rain precipitation was detected in one of two units with wet electrostatic precipitator. High concentration of gypsum rain precipitation and liquid drop were found in the contrast unit. It was suggested that power plants should take measures to increase flue gas temperature and to eliminate gypsum rain emissions. The national emissions standard for thermal power plants should include monitoring methods and assessment system, for taking full consideration to kinds of pollutant emissions and their impact on the environment, such as gypsum rain and CPM. |
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