摘要:
[目的] 文章主旨为满足国家对火力发电厂烟气污染物排放"超洁净"排放指标的要求。 [方法] 通过对广东某火力发电厂除尘和脱硫技术进行研究,提出了高效脱硫及除尘一体化超洁净技术,并在该电厂顺利应用。在常规烟尘和SO2脱除方案上的基础上,通过对已有除尘和脱硫设备进行一体化设计和优化,并增加MGGH装置和电除尘除雾装置,协同对污染物包括烟尘和SO2进行脱除,并提高烟囱出口烟气温度,减少烟气中液滴和烟尘浓度。 [结果] 机组投运后,实测烟囱出口烟尘和SO2排放浓度为2.2 mg/Nm3和16.7 mg/Nm3,满足并优于火力发电厂"超洁净"排放的要求,且消除了烟囱出口的"石膏雨"现象。 [结论] 应用该项技术,可以在不设置湿式除尘器的条件下即可满足"超洁净"的排放要求,对新建或改造项目有很好的指导和借鉴意义。
Abstract:
[Introduction] Aimming to satisfy the state's "ultra-clean" emission requirements for the emission of flue gas pollutants from thermal power plants. [Method] With the research on the technology of dust removal and desulphurization in a thermal power plant in Guangdong, an integration ultra-clean technology of high-efficiency desulphurization and ultra-clean dust elimination has been put forward and applied successfully. Based on the conventional scheme on dust removal and desulphurization, the integration of high-efficiency desulphurization and ultra-clean dust elimination technology was researched and optimized, and the equipment of MGGH and electrostatic dust and mist eliminator was added. The dust and sulfur dioxide was removaled synergistically, and the temperature of flue gas outlet of the chimney was improved, and the concentration of liquid drop and dust was reduced. [Result] The results shows that the concentration of dust and sulfur dioxide is only 2.2 mg/Nm3和16.7 mg/Nm3.It means satisfy and is better than the requirement of "ultra-clean",and the gypsum rain is eliminated. [Conclusion] With this technology, it is possible to satisfy the "ultra-clean" emission requirements without WESP, and it is a guidance for the newly-build and reformed project.
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