Analysis on the Typical Problems of a 1000MW Ultra Supercritical Coal-fired Boiler in Commissioning Period

The article presents typical problems of ultra supercritical once-through boilers during start-up commissioning period,including boiler steam blowing,water-wall overheat, pulverized coal piping block and others.According to the reasons of the abnormal conditions, it provides reasonable solutions in respect of technology and security,as well as the key points and preventive measures.The boiler operating characteristics can be seen preliminarily by commissioning,which also offers technical references for the same type boilers commissioning and operating.