How to Control Noise from Standard Flue Gas and Dust Removal Boiler Fans

How to Control Noise from Standard Flue Gas and Dust Removal Boiler Fans

Given the noise hazards posed by flue gas and dust removal boiler fans in the manufacture of bricks and tiles, specialist manufacturers have conducted detailed research into noise control for these fans and analysed the situation based on actual conditions. Consequently, by identifying the primary sources of noise and their propagation paths, and implementing effective countermeasures to control noise, it is possible to reduce or block noise along the propagation path and eliminate noise at the source. The aim is to minimise the noise pollution caused by flue gas and dust removal boiler fans in the environment, thereby improving the quality of people’s work and lives. Methods for Controlling Noise in Standard Flue Gas and Dust Removal Boiler Fans To effectively control airflow within flue gas extraction and dust removal boiler fans, three-dimensional blade designs and curved blades are suitable for specific types of these fans. The circumferential direction of the overlap lines and the variations in the meridional plane differ. The influence of the flow channel’s flow field structure on different blades, the pressure gradient generated by the blades, the angle region between the negative pressure surface and the front plate, and the end regions all serve to direct low-energy fluid into the main flow path. Currently, a five-hole probe is used to measure the flow field in the airstream of a centrifugal fan with a trapezoidal cross-section; testing can reveal the actual distribution of internal airflow parameters. Preliminary analysis and results are currently being conducted, leading to improvements in the design and the establishment of certain standard values. The dynamic response of flue gas and dust removal boiler fan blades under unstable air loads is considered in numerical simulations. Three-dimensional simulations of the rotating wheel housing of flue gas and dust removal boiler fans, as well as the spatial relationship between the wheel housing leakage and the unsteady flow field, are utilised. A comparison of experimental measurements with numerically calculated vortex amplitudes shows good agreement, indicating that this method can accurately simulate the dynamic response of vortex flow pressure. In recent years, research on airflow control has been conducted, covering the identification of airborne noise, flow field analysis, prediction of noise fields, and a brief description of noise control sources, alongside theoretical studies and experiments on centrifugal fans.