Stress Analysis of a 600 MW Supercritical Boiler Start-Up Separator in Peak Load Operation

Taking a start-up separator of 600 MW supercritical boiler as the study object, analyse the stress field of it during the process of load pick-up with the three-dimensional finite element analysis method. In the analytical process, it has calculated the thermal stress, mechanical stress and the total stress of them, and analysed the change rules of them, so it provide the guidance of the production operation processes. The calculation results show that: the thermal stress of open pore on start-up separator exists obvious stress concentration phenomenon; The stress concentration of the total stress occurred in the oval long axis of cylinder body wall, where is the danger point of the start-up separator.