中国燃煤烟气汞排放控制策略OA

Mercury in the emission from coal combustion is highly toxic,volatile and bioaccumulative,posing a long-term threat to the ecosystems and human health.In this paper,the current status and control policies of mercury emissions from coal combustion in China were systematically reviewed,and the distribution characteristics and transformation mechanisms of mercury during coal combustion were analyzed,with a focus on the mechanisms and performance of collaborative mercury removal in the pollution control devices after ultra-low emission retrofitting.Furthermore,a progressive strategy of"synergistic enhancement-deep purification-resource recycling"for mercury emission reduction was proposed,including three tiers:optimizing the operational parameters of pollution control systems to improve the synergistic mercury removal efficiency of various control devices;developing an efficient mercury adsorption and catalytic oxidation technology for coal-fired flue gas,with a focus on the industrially applicable mercury removal technologies;developing an integrated mercury removal and recovery technology for coal-fired power plants(e.g.,magnetospheres mercury removal and mercury recovery technologies),focusing on the high-value utilization of mercury.Finally,combining the latest international compliance requirements and domestic environmental tax policies,the future research directions on the emission control of mercury in coal-fired flue gas in China were outlined,providing theoretical and technical support for the China's international commitments and near-zero emissions of coal combustion pollutants.