Pipeline of pressure reducer and attemperator
in a power plant based on vibrationdamping technology
HU Peng, HE Lidong, ZHANG Zhenkun, LV Chenglong
(Engineering Research Center of Chemical Technology Safety Ministry of Education,
Beijing University of Chemical Technology, Beijing 100029, China)
Abstract: In order to solve the problems of the pressure reducer and attemperator water pipeline vibration in a power plant in Fushun, the pipeline damping technology was investigated. The vibration frequency and velocity of piping systems were measured and the drawings were collected. A finite element model for piping system was established. After the structure modal analysis and mechanical analysis were carried out, the vibration characteristics of pipeline were obtained. Damping vibration of pipeline simulation was carried out by applying SAP2000 software. The relationship between the piping vibration characteristics and damping technology was founded. According to simulation results, the best way to solve the pipeline vibration was put forward. The actual results show that, by using damping vibration technology, installing dampers to suitable location in the pipes can effectively suppress the vibration of the pipeline without shutting down the machine set and changing the original structure of the piping systems, then ensure long cycle and stable operation of unit.
Key words: pressure reducer and attemperator; pipe vibration; finite element analysis; damper