Noise control of bag filter operation

There are various methods for controlling baghouse noise, which can be summarized into three categories: reducing the noise of the sound source; protective measures of the receiver; noise control of the propagation path. Which method or combination of methods is used to control the bag filter noise depends on the standards to be achieved, as well as the economic and operational considerations. There are various methods for controlling baghouse noise, which can be summarized into three categories: reducing the noise of the sound source; protective measures of the receiver; noise control of the propagation path. Which method or combination of methods is used to control the bag filter noise depends on the standards to be achieved, as well as the economic and operational considerations.

(1) noise control of bag filter dust source

The most fundamental way to control noise in a bag filter is to reduce noise in the sound source. The sound source noise control method is:

1 Reduce the excitation power of the sound source. One is to reduce the impact caused by aerodynamic forces and eddy current noise; the second is to improve the dynamic balance accuracy of the bag filter fan impeller and the rotating shaft to reduce the noise generated by the unbalanced rotation of the bag filter fan; third is to provide good lubrication To reduce the friction; Fourth, the sound source vibration isolation. These methods can effectively reduce the incentive.

2 Reduce the response of noise radiation components in the dust removal system to the excitation force. The first is to change the natural frequency of the resonant component (when the frequency of the excitation force is equal to or close to the natural frequency of a component, it will excite the strong resonance of the component, resulting in intense noise); Second, the use of damping materials to increase Loss of energy, reduced noise radiation.

3 Correctly installed, properly used and maintained to prevent abnormal noise from occurring.

(2) Protective measures of the receiver

The receiver may be a collection of one person or several people, or a noise-sensitive device. Earplugs, earmuffs, or soundproof walls and soundproof rooms can be used to control the noise to a permissible level and to prevent the noise of the bag filter.

(3) Noise control of transmission path

1 source radiation. A well-designed sound enclosure is used around the noise source or around the receiver to keep the sound source sealed and to prevent or reduce outward propagation of the bag filter noise source.

2 sound absorption. Using the sound absorption principle, a good absorbent material is used so that the bag filter noise is continuously attenuated in the transmission path.

3 sound reflections. Using the sound reflection principle, using a discontinuous structure, the sound energy is reflected to the sound source and the noise of the bag filter is blocked.