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根据330 MW锅炉的试验数据,重点探讨了中速磨煤机工作特性与旋流燃烧器的匹配性及其对燃烧稳定性、火焰温度分布和锅炉效率的影响.通过优化调整磨煤机挡板开度、一次风压和输粉管煤粉分配均匀性以及煤粉细度,改善了单只燃烧器出口的燃烧条件,增强了燃烧稳定性,使着火条件较差的A层燃烧器出口着火区火焰温度上升40 K,A、B层燃烧器出口火焰平均温度提高70 K,火焰温度分布均匀性随之提高.在此基础上,进一步调整二次风控制方式和过氧量,降低了飞灰和灰渣可燃物含量.该优化调整方案可使锅炉效率提高1.8%.
According to the test data of 330 MW boiler, the matching between working characteristics and swirling burner and its influence on combustion stability, flame temperature distribution and boiler efficiency are discussed emphatically.After optimizing the coal mill baffle Opening, primary air pressure and pulverized coal distribution uniformity and fineness of pulverized coal improve the combustion conditions at single combustor outlet, enhance the combustion stability, and make the ignition of A-layer combustor with poor ignition condition fire The temperature of the flame in the zone rises 40 K, the average flame temperature at the outlet of the A, B burner increases by 70 K, and the uniformity of the flame temperature distribution increases accordingly. On this basis, the secondary air control method and the amount of oxygen are further adjusted, Ash and ash combustible content.The optimization adjustment scheme can improve boiler efficiency by 1.8%.