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循环流化床的特点:燃烧效率和锅炉热效率高。通过添加石灰石,可进行炉内脱硫处理,脱硫率可达90%以上。采用低温燃烧,有害气体NOx生成量减少,有利于环境保护。煤种适应性广,有利于灰渣的综合利用,提高经济效益。 1 炉膛正压的形成循环流化床锅炉正常燃烧时,一般要求炉膛保持负压燃烧(10～30Pa),但是,有些锅炉在运行时,常常又会发生正压燃烧的现象,其原因有以下几个方面。
Circulating fluidized bed features: high combustion efficiency and boiler thermal efficiency. By adding limestone, furnace desulfurization can be carried out, desulfurization rate of up to 90%. The use of low-temperature combustion, NOx reduction in harmful gases, is conducive to environmental protection. Wide adaptability of coal, is conducive to the comprehensive utilization of ash, improve economic efficiency. 1, the formation of a positive pressure chamber When circulating fluidized bed boiler normal combustion, the general requirements of the furnace to maintain negative pressure combustion (10 ~ 30Pa), However, some boilers are often running, often positive pressure combustion phenomenon, the following reasons several aspects.