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通过分析变工况除尘系统运行时管网和风机特性曲线的变化规律，推导出了变工况除尘系统风机调速的计算方法和步骤，阐述了确定变工况系统设计风量时应该注意的问题。
By analyzing the changing rules of the pipe network and the fan characteristic curves when the dedusting system is in operation, the calculation method and steps of the fan speed control in the dedusting system with variable operating conditions are deduced. The problems that should be paid attention to in the design of the variable air volume system are expounded .