300MW Concurrent Boiler Denitration Technology Analysis

Nitrogen oxides NO_x is one of the coal-fired power plant flue gas emissions of the threepollutants （SO₂, NO_x, and total suspended particles TSP）. National and local environmentalpolicy is becoming more stringent, with the new “Emission standard of air pollutants fortheraml power plant”（GB13223-2011） was released on July29,2011, the post-combustionNO_x control imperative. From foreign experience, selective non-catalytic reductiontechnology is a lower cost of flue gas denitrification technology transformation ofconvenience, suitable for other low-NO_x technology collaborative applications, and has broadprospects for development in the domestic. Since the1975Lyon invention SNCR abroad ithas never been interrupted, and future applications in combustion equipment. DomesticSNCR less nitrogen oxide control of environmental policy and research techniques relativelylate start, go to a conservation type the, moderate control environmental road is in line withChina’s national conditionsThis paper analyzes the application background and operation of a300MW DC Boilerdenitration technology. For the effective control of regional air pollution, improve urban airquality, to ensure that the requirements of national standards of the city’s air quality of each ofthe main pollution indicators, the People’s Government of Guangzhou City in June2009issued "on the implementation of key industrial enterprises in lowering nitrogende-denitrification work of the notice"（SuiHouse [2009] on the26th）, the city’s majorindustrial enterprises in the implementation of the notice drop the nitrogen the denitrationwork, Huangpu Power Plant, despite the low NO_xcombustion transformation has effectivecontrol of NO_xemissions, it is still difficult to achievedenitration rate requirements. To thisend, the Huangpu Power Plant boiler on active duty domestic300MW coal-fired unitsSG1025/16.7-M313UP selective non-catalytic reduction （SNCR） DeNO_xsystemtransformation. The SNCR system put into operation, the unit appears a lot of questions:boiler tube, A/B side ammonia escape the concentration deviation and higher, affecting boilerperformance, and denitrification efficiency reach design parameters, so their stocksystemoptimal adjustment of trials, research and analysis based on the test results and provideguidance. SNCR system optimization before adjustment NO_x concentration280mg/Nm3 about ammonia slip concentration of20ppm or so, SNCR system optimization and adjustment,the NO_xemission concentration of basic maintenance at190to220mg/Nm³, the lowest reach180mg/Nm³ammonia slip concentrationreached about10ppm.