When the primary dedusting fan of wet-type dedusting system for converter uses frequency converter drive, to appropriately set up the valve on the air inlet pipe of the fan can switch fans without production shutdown of the converter. This method requires mini-mum investment and brings the steel plant with maximize benefit.%转炉湿法除尘一次除尘风机采用变频器传动时，在风机进气管道上合理设置阀门，使得转炉不停产就可切换风机，且设备投资最小，可为炼钢厂争取最大效益。
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