System design and testing research of minimal-oil ignition burner on pulverized coal fired boilers

In terms of the retrofit of minimal-oil ignition technology in the 600 MW unit of Tianjin Datang International Panshan Power Generation Co., Ltd., the working principal, retrofit scheme and system components of the minimal-oil ignition technology are introduced in this paper. The concretely adopted scheme involves that the small gasified oil gun is adopted to replace the starting-up oil gun, and the concentration device is arranged to realize the concentration-staged combustion of pulverized coal, without any influence to the boiler´s performance. The experiment results indicate that the minimal-oil ignition technology can be applied in startup, stopping and aided combustion in low load condition of pulverized coal fired boilers. The average fuel oil consumption after retrofit is reduced by over 90%. The minimal-oil ignition system is simple, operation convenient and little maintenance is needed. Its extensive application can bring prominent economic and environmental advantages.