Research on condition monitoring, failure risk and three dimensional fault location technology of utility boiler

Abstract

With the increasing capacity of thermal power units in China, due to the influence of Coal mixed combustion, peak load regulation and combustion conditions and other factors, the boiler burst accident has not yet reached the design life. Considering the factors of coal quality, heat transfer mechanism, equipment deterioration, material aging and off-line data, on-line model combined with off-line data is used to monitor the pipeline life damage. A boiler monitoring system based on digital twin technology is developed to realize the mapping of key equipment states in boiler spatial structure. By displaying the status of digital twin, operators can directly perceive the weak links of boiler equipment and accurately locate the high-risk parts of the equipment. Put forward condition based maintenance opinions or operation optimization measures three days before the occurrence of risk to avoid unnecessary shutdown of the unit and effectively ensure and improve the reliability of boiler equipment.