Takes a 1000MW ultra-supercritical unit boiler as the research object,the extraction of temporary furnace flue gas is studied,and realizes the key technology and adjustment method of SCR denitration system when the boiler is fired.According to the theoretical calculation,with the increase of ignition operation time of the boiler,the proportion of flue gas extracted from the temporary coal-fired boiler shows a decreasing trend,and the influence on the temporary furnace reheat steam temperature,hot primary wind temperature and hot secondary wind temperature shows a decreasing trend.In boiler ignition 2-3 minutes,the extraction of furnace coal-fired boiler flue gas is larger,in the furnace reheat steam temperature reduce about 22℃,reduce the thermal primary air temperature of about 36℃,reduce the thermal secondary wind temperature of about 40℃,now can adjust the furnace boiler load to BRL condition,shut down the furnace mill cold door opening,makes the bituminous coal fire and unit safety influence controllable.Optimizing the design of the flue gas heating system for the extraction furnace can basically meet the requirements of the SCR denitration system.
coal-fired boilerSCR denitration systemdepth peak regulationscheme study
维普
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