BASE-LOCATED LOW NOX BURNER APPLICABLE TO LARGE LOAD ADJUSTMENT

摘要

The invention relates to a bottom-mounted low-nitrogen combustor suitable for large-range load adjustment. The bottom-mounted low-nitrogen combustor comprises a center flame adjusting pipe, a primary air pipe, a secondary air pipe and a tertiary combustion supporting device, all of which are sequentially arranged from inside to outside in a sleeved manner. A coal dust flow stabilizing mechanism is arranged at an inlet of the primary air pipe, and a primary air cyclone is arranged at an outlet of the primary air pipe. An air premixing device is arranged at an inlet of the secondary air pipe, and a secondary air cyclone is arranged at an outlet of the secondary air pipe. A flame stabilizing device is further arranged at an outlet of the secondary air pipe. An air outlet of the tertiary combustion supporting device communicates with the flame stabilizing device. According to the bottom-mounted low-nitrogen combustor, due to the reasonable arrangement of the structure, classified combustion can be achieved, the load adjustment range of the combustor is greatly enlarged, the adaptability of the combustor to different conditions in the industry is improved, a low-nitrogen combustion technology is adopted, the initial emission index of the combustor is far lower than the emission condensation of the natural regulation, and the beneficial effects of high efficiency, energy conservation, emission reduction and environment friendliness are achieved.