Integrated life synthesis for boiler sootblowers in fossil power plants

Abstract Boiler sootblowing in a typical fossil power plant is intended to prevent accumulation of deposits, resulting from the combustion of coal from choking the boiler gas passes. The paper presents a new avenue in the process of maintaining the highest possible thermal efficiency in boilers by improving the sootblower's structural integrity. This is achieved through an integrated approach to life synthesis of sootblowers. The approach proposes a practical and simplified model for sootblowers in the form of an axisymmetric finite element. The model is axisymmetric in geometry, but not in loading. The analysis of the model is integrated with optimal design for new sootblowers. Also, it is integrated with the optimal remnant design for sootblowers already in service. The integrated life synthesis yields the acceptable calculated number of cycles to failure and corresponding reliability. This process monitors the functional life and improves the structural integrity of sootblowers in boilers. Consequently, the proposed integrated life synthesis is a systematic and well-organised methodology that results in optimal structural performance.