Research on startup scheme for newly-built thermal power plants without auxiliary steam and start-up boiler

The startup scheme was presented for newly-built coal-fired power plant without any start-up boilers and auxiliary steam.According to this scheme,in the absence of external steam(including the steam from start-up boiler),a complete test and start-up procedures were accomplished.In this case,the boiler was directly ignited and heated by oil gun and the desuperheating and decompressive device was used to provide main steam for the heating of grand seal.Such grand-seal heating steam can be adjusted according to the cylinder temperature of steam turbine and available for the startup of power units out of operation after the overhaul.It solved the problem of unit restarting without auxiliary steam after the overhaul of power units.