Real-time monitoring on boiler combustion based on acoustic measurement

Abstract

The temperature field is one of the most important parameters of combustion safety in boiler. In this paper, acoustic pyrometry, a new diagnosis tool of combustion safety in boiler, is given. The principle of acoustic pyrometry is introduced. The unique benefits of diagnosis on combustion safety are described. Two key techniques of acoustic pyrometry, the measurement of time of flight (TOF) of sound wave and the reconstruction algorithm of two-dimensional temperature field, are solved, based on cross correlation analysis and series expansion reconstruction algorithm respectively. According to a corner tangential temperature field mode, the accuracy and feasibility of acoustic pyrometry is proved by computer simulation