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  • 刘含笑,陈招妹,王少权,蔡锡锋,郭高飞,沈敏超,周冰.燃煤电厂SO3排放特征及其脱除技术[J].环境工程学报,2019,13(5):1128-1138.DOI:10.12030/j.cjee.201812137    [点击复制]
  • LIU Hanxiao,CHEN Zhaomei,WANG Shaoquan,CAI Xifeng,GUO Gaofei,SHEN Minchao,ZHOU Bing.Emission characteristics and removal technology of SO3 from coal-fired power plants[J].,2019,13(5):1128-1138.DOI:10.12030/j.cjee.201812137   [点击复制]
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燃煤电厂SO3排放特征及其脱除技术
刘含笑,陈招妹,王少权,蔡锡锋,郭高飞,沈敏超,周冰
0
(浙江菲达环保科技股份有限公司,诸暨 311800)
摘要:
通过现场实测和文献调研相结合的方式,对目前燃煤电厂SO3排放特征进行较全面的表征,排放浓度为0.3~22.7 mg·m-3,按10 mg·m-3和5 mg·m-3排放限值考核,达标率分别为89.8%、66.7%。对现有除尘、脱硫设备及新技术的SO3脱除能力进行定量分析,常规电除尘器对SO3脱除率仅为10%~20%;低低温电除尘技术可达95%以上;电袋复合除尘器可达80%以上;常规石灰石石膏湿法脱硫技术多在30%~60%,采用旋汇耦合、双托盘等技术后,SO3脱除率可达90%以上;金属板式湿式电除尘器多在50%~80%,导电玻钢管式湿式电除尘器多在60%~90%;碱基干粉或溶液喷射技术均可达到80%以上的SO3脱除效果;烟气冷凝相变凝聚技术在消除有色烟羽的同时,也具有一定的SO3脱除效果。根据不同SO3脱除技术对比结果,碱基喷射技术不仅可以实现较高SO3脱除效果,还可有效解决空预器的腐蚀、堵塞等问题,将是未来解决高浓度SO3问题的主流技术方向。
关键词:  燃煤电厂  SO3  排放特征  脱除技术
DOI:10.12030/j.cjee.201812137
投稿时间:2018-12-20
基金项目:国家重点研发计划项目2016YFC0209107;浙江省重点研发计划项目2018C03SA631191国家重点研发计划项目(2016YFC0209107);浙江省重点研发计划项目(2018C03SA631191)
Emission characteristics and removal technology of SO3 from coal-fired power plants
LIU Hanxiao,CHEN Zhaomei,WANG Shaoquan,CAI Xifeng,GUO Gaofei,SHEN Minchao,ZHOU Bing
(Zhejiang Feida Environmental Science & Technology Co. Ltd., Zhuji 311800,China)
Abstract:
The current emission characteristics of SO3 from coal-fired power plants was comprehensively characterized by field measurement and literature survey, the emission concentration was determined as 0.3~ 22.7 mg·m-3 with the compliance rates of 89.8% and 66.7% according to the emission limits of 10 mg·m-3 and 5 mg·m-3, respectively. Based on quantitative analysis of the SO3 removal capacities of the existed equipment for dust removal and desulphurization and new technology, the SO3 removal efficiencies of conventional ESP, LL-ESP and EF were only 10%~20%, higher than 95% and higher than 80%, respectively. For the conventional WFGD, the SO3 removal efficiency was mostly 30%~60%, while it could be improved up to higher than 90% when spiral-sink coupling, double pallet and other technologies were used. Moreover, the SO3 removal efficiencies were mostly 50%~80%, 60%~90% and higher than 80% for the metal plate type WESP, the conductive glass tube type WESP and alkaline dry powder or solution injection technology, respectively. The colored plume and SO3 could be synchronously removed by PCA technology. Based on the comparison of different SO3 removal technologies, the alkaline dry powder injection technology can not only achieve higher SO3 removal effect, but also solve the corrosion, blockage and other problems of air heater effectively, which will be a major technology direction for solving the problem of SO3 with high concentration in the future.
Key words:  coal-fired power plant  SO3  emission characteristics  removal technology