Damper Control Method and Application Based on Furnace Burnout Air Temperature Monitoring

In this paper, a damper control method and device based on furnace burnout air temperature monitoring are introduced. In this method, the flue gas temperature distribution inhomogeneity and opening variation curves are obtained by testing the unilateral burnout damper of the target boiler under different burnout damper opening degrees on one side of the target boiler. The unilateral combustion damper of the target boiler is tested, and the uneven flue gas temperature distribution and wind speed variation curves under different unilateral combustion wind velocities of the target boiler are obtained. The obtained curves were fitted separately to obtain a comprehensive first transfer function to characterize the uniformity of the flue gas temperature distribution of a single burnout damper opening and wind speed change. The developed device includes a temperature monitoring module, a data acquisition module, a fitting module and a control module. The research method was applied in the target power plant, and the implementation effect showed that the system could ensure the uniformity and adequacy of furnace combustion and reduce the occurrence of furnace eccentricity.