| 摘要 |
PURPOSE:To prevent the occurrence of noise of low frequency due to the vibration of air by providing an air inlet in the midway of a bypass duct and before and behind an electric dust collector, connecting the front and rear of an induction ventilator by a duct. CONSTITUTION:Air inlets 18, 19, and 20 are provided in the bypass duct 17 of an electric dust collector, the outlet duct 8 of a boiler, and the outlet duct 10 of the dust collector in such a way that the electric dust collector 9 does not serve as an air spring. Or, a connecting duct 21 is provided between the outlet duct 10 of the electric dust collector and the outlet duct 14 of am induction ventilator. Thus, even when an evergy-saving operation is made by throttling the outlet damper of the boiler, noise of low frequency due to the self-excitation vibration of air can be prevented. |
