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通过分析大唐国际托电二期3号炉一次风机运行中频繁失速原因，从运行和热控角度在失速前进行预防处理、失速判断以及失速后设备联锁动作情况，有效的减少运行中一次风机失速的可能性，同时通过运行正确操作提前干预减轻一次风机失去后对风机和机组的不良影响，防止磨煤机堵磨和锅炉灭火等设备损坏等事故的发生。Through the analysis of Datang International Tuoketuo Power Plant Phase two of No. 3 boiler primary air fan in operation frequent stalling, from running and thermal control angle in the stall, stall prevention and treatment of judgment and post-stall interlock operation of equipment, reduce the operation of primary fan stall the possibility, at the same time by running the proper operation of early intervention reduce a fan after losing on fan unit and adverse effects, prevent coal grinding machine grinding and blocking of boiler fire extinguishing equipment damage accident.