BIAN Fang, ZHANG Yugang, WANG Huaiyong, et al. Reason analysis and treatment for vibration in a supercritical unit tower type boiler[J]. Thermal power generation, 2015, 44(5): 113-117.
BIAN Fang, ZHANG Yugang, WANG Huaiyong, et al. Reason analysis and treatment for vibration in a supercritical unit tower type boiler[J]. Thermal power generation, 2015, 44(5): 113-117.DOI:
High frequency vibration occurred in upper part and tail flue duct of the 600 MW supercritical unit tower type boiler firing lignite in Huaneng Jiutai Power Plant
resulting in frequent heat leakage of heat surface.Analysis shows the major reason is the sympathetic vibration between the vortex shedding frequency resulted from the Karman vortex shedding from the heating surface and the acoustic standing wave frequency occurred in gas room.Therefore
to eliminate the sympathetic vibration by changing the acoustic standing wave frequency in gas room
a countermeasure that adding baffles in the flue duct was proposed.After the baffles were added
the boiler vibration was thoroughly eliminated.Moreover
over temperature of the final super heater tube wall with large area never occurred again.