| In recent years,due to the rapid development of China's industry,air pollution has become more and more serious.The emission of nitrogen oxide from coal-fired boilers in power plants is one of the main factors causing air pollution.Since the environmental protection departments have strengthened the protection of the environment,it is necessary for the power plant to take certain measures to improve the emission standards of flue gas,especially reducing the emission of NO_x.Therefore,denitration technology is particularly important.At present,there are more mature denitrification technologies for coal-fired power plants in power plants:Selective catalytic reduction of denitration(SCR)and selective non-catalytic reduction and denitration(SNCR).Among them,due to the selective non catalytic reduction denitration technology without expensive catalyst system?the advantages of simple equipment are widely used in coal-fired power plants.Therefore,the SNCR denitrification technology is used to remove the nitrogen oxides from the flue gas,to a certain extent,good environmental and economic benefits can be obtained.Hanfeng Power Plant 1,2 coal-fired units with the actual operation,Combined with the new standards for pollutant discharge from thermal power plants in the current state,Through the comparison of various denitrification technologies?route verification and investment cost estimation,the power plant finally decides to adopt the SNCR denitrification scheme,and using urea as a reducing agent.This topic in Hanfeng Power Plant 1,No.2 coal fired boiler NOx emission reduction as the research target,according to the status of boiler operation,fuel characteristics and so on,the revamping scheme of SNCR flue gas denitrification is summarized,and the results are further analyzed to provide a theoretical reference for the transformation of flue gas denitrification in domestic coal-fired units. |
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