Research And Practice Of Ultra-low Emission Reconstruction Scheme Of Unit 5 In A Power Plant

In the coal-fired generating units production process,coal combustion produces large amounts of nitrogen oxides(NOx),sulfur oxides(SOx),soot,etc.,these pollutants has great harm on the environment and the hum an body.Reduce pollutant emissions is an important measure to control air and reduce haze.As countries have introduced increasingly stringent thermal power plant pollutant emission standards,many large thermal power plants are actively transform Ultra-low emissions.In 2015,to implement the national plan of action for the control of air pollution and energy development strategy,the NEPA,the National Development and Reform Commission,the Department of Energy jointly published the notice file which require to speed up the pace of retrofitting ultra-low emissions of active coal-fired generating units and achieve comprehensive realization of ultra-low emission in 2017(namely under the condition of 6% oxygen content,dust,sulfur dioxide,nitrogen oxide emissions concentration were respectively less than 10,35,5 mg/m3).By implementing ultra-low emissions effectively,it will resolve the contradiction between the coal resource utilization and environmental carrying capacity,thus further enhancing green development ability of energy utilization of coal-fired enterprise.The construction of ultra-low emissions project is not only related to the sustainable development of the electric power industry,but also affects the social environmental benefits.Huaneng Group "on the" 13 th Five-Year "apply for the preparation of ultra low emission coal-fired power plant retrofit scheme of the emergency notice" requirements:ahead of schedule to be completed in 2017;the original eastern region extended to the country;for all areas of the service unit capacity of 300 MW and above coal-fired units.All this is clear in the fact that ultra low emission transformation imminent.This article through to a power plant unit 5 denitration system added SCRcatalyst layer,the electric dust removal system reformation of high frequency power supply,ultra low emission transformation of FGD desulfurization system adding the spray layer and the tray of the scheme for the research and engineering practice,after the completion of the transformation,the unit of the emissions targets to reach and better than the national low emission index.The scheme is feasible and efficient,which can provide practical reference for the same type of power plant in china.